CN112607083B

CN112607083B - Roll paper film-drawing packaging method

Info

Publication number: CN112607083B
Application number: CN202011395359.5A
Authority: CN
Inventors: 黄雅宋; 马标
Original assignee: Jiangsu Bodner System Engineering Co ltd
Current assignee: Zhongzhida Intelligent Electric Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2022-06-21
Anticipated expiration: 2040-12-03
Also published as: CN112607083A

Abstract

The invention discloses a roll paper stretch film packaging method, wherein a roll paper stretch film packaging line comprises a roll paper conveying unit, an automatic weighing unit, an automatic label printing and pasting unit, a stretch film packaging unit and a centralized electric control unit, and the stretch film packaging method specifically comprises the steps of packaging preparation, automatic weighing, automatic printing and labeling at one time, stretch film packaging, outputting, automatic printing and labeling at two times and the like. The web stretch film packaging method utilizes the structural characteristics of a cylindrical product of the web, adopts a mode of automatically winding the packaging film along the circumferential direction of the horizontal diameter direction on the web horizontally arranged in the axial direction, can effectively reduce the labor intensity of operators on the premise of effectively packaging the finished product web, simultaneously reduces the occupation of packaging space, and is particularly suitable for packaging the finished product web output by a paper machine.

Description

Roll paper film-drawing packaging method

Technical Field

The invention relates to a packaging method, in particular to a web film-drawing packaging method for packaging web products produced by a paper machine, and belongs to the technical field of packaging.

Background

Paper is generally made from an aqueous suspension of plant fibers that has been subjected to a pulping process, combined in a web-like manner, preliminarily dewatered, compressed, and dried. Paper is currently manufactured by mechanisms that include stock preparation, pulping, papermaking, and continuing on the paper machine until a web or sheet is made.

The industrial roll paper is a paper roll which is formed by cutting and rolling paper made by a paper machine through a rewinder and has width and diameter meeting national standards or user requirements, can be used for various industries such as rotary printing, automatic packaging and the like, generally the width of the industrial roll paper in China is 1575mm, 1092mm, 880mm, 787mm and the like, and the single roll paper has heavier weight and can reach the tonnage level generally. The finished web needs to be weighed before being put in storage and then is pasted with a label and packaged in a moisture-proof way, and usually, the label is pasted once before and after the moisture-proof packaging. Although automatic operation is realized in machine-made paper making, most of the existing finished product roll paper packaging procedures still adopt manual operation, namely, the finished product roll paper is manually pushed to carry out weighing, primary label pasting, packaging, moisture-proof plastic diaphragm pasting and secondary label pasting after being detached from the paper making machine. The manual operation mode has low efficiency, and because the finished roll paper is usually large in diameter and heavy in weight, the labor intensity of operators is high, and the risks of rolling and squeezing feet exist; in addition, because the diameter of the finished web is usually large, the manual rolling packaging method requires a long rolling path, and thus the packaging in a narrow space cannot be realized.

Although the film drawing packaging machine in the prior art can realize automatic winding packaging, the film drawing packaging machine can only carry out automatic winding packaging of the diaphragm for surrounding the axis along the vertical axis generally, and the top surface and the bottom surface of the packaged object can not be automatically wound and packaged, even if the top surface of the packaged object can be realized and independent diaphragm is paved and then automatic winding packaging is carried out, the packaging of the bottom surface of the packaged object can not be realized, therefore, the film drawing packaging machine is generally suitable for the whole winding film drawing packaging after a plurality of independently packaged regular packaging boxes are neatly stacked on the tray. For a single roll of paper with heavy weight and large size, it is difficult to realize automatic film-drawing packaging in which a diaphragm is laid on two circular end faces and then automatically wound, so people in the industry of papermaking generally do not consider to adopt a film-drawing packaging machine to perform film-drawing packaging on a roll of paper product, and how to realize full-automatic rapid packaging on a roll of paper product with heavy weight and large size is still a difficult problem in the industry at present.

Disclosure of Invention

Aiming at the problems, the invention provides a web stretch film packaging method which can effectively reduce the labor intensity of operators and reduce the occupation of packaging space on the premise of effectively packaging finished webs, and is particularly suitable for packaging finished webs produced by a paper machine.

In order to realize the aim, the roll paper film-drawing packaging line comprises a roll paper conveying unit, an automatic weighing unit, a label automatic printing and pasting unit, a film-drawing packaging unit and a centralized electric control unit;

the roll paper conveying unit comprises a conveying device and a roll paper conveying electric control device. The conveying device is a multi-section conveying structure which is connected end to form a whole linear structure conveying line, the multi-section conveying structure sequentially comprises a roll paper input section, a roll paper weighing section, a roll paper film-drawing packaging section and a roll paper output section from back to front, the conveying device is a belt conveying structure or a roller-arrangement conveying structure comprising a roller driving motor, the roll paper conveying electric control device comprises a roll paper conveying controller and a roll paper conveying control loop, and the roll paper conveying controller is electrically connected with the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roller driving motor of the roll paper output section respectively;

the automatic weighing unit is arranged corresponding to the roll paper weighing section of the roll paper conveying unit and comprises an electronic scale and a weighing electric control device; the electronic scale is horizontally positioned and installed under a roll paper weighing section of the roll paper conveying unit; the weighing electric control device comprises an automatic weighing controller and a weighing control loop, and the automatic weighing controller is electrically connected with the electronic scale;

the automatic label printing and pasting unit comprises a roll paper weighing section label printing and pasting part, a roll paper output section label printing and pasting part and an automatic label printing and pasting electric control device; the label printing and pasting part of the roll paper weighing section is correspondingly arranged on the left side or the right side of the roll paper weighing section of the roll paper conveying unit, and the label printing and pasting part of the roll paper output section is correspondingly arranged on the left side or the right side of the roll paper output section of the roll paper conveying unit;

the label printing and pasting part of the roll paper weighing section and the label printing and pasting part of the roll paper output section respectively comprise an automatic printing and marking machine, an automatic label pasting mechanical arm and an automatic label pasting mechanical arm; the automatic printing and marking machine is arranged on the ground; the automatic label pasting mechanical arm is correspondingly arranged near the automatic printing and marking machine and at least comprises an X coordinate driving mechanism moving along the horizontal left-right direction and a Z coordinate driving mechanism moving along the vertical up-down direction; the label automatic pasting mechanical arm is arranged on the tail section of the label automatic pasting mechanical arm and comprises a label negative pressure grabbing device, the label negative pressure grabbing device comprises a negative pressure sucker arranged through a sucker support, and the negative pressure sucker is connected with a negative pressure source through an air channel pipeline and an air channel control valve;

the automatic label printing and sticking electric control device comprises an automatic label printing and sticking controller, an automatic label printing control loop and an automatic label sticking control loop, wherein the automatic label printing and sticking controller is respectively electrically connected with an automatic printing and marking machine, a coordinate driving mechanism of an automatic label sticking mechanical arm and an air passage control valve of a label negative pressure grabbing device;

the film drawing and packaging unit is arranged corresponding to a roll paper film drawing and packaging section of the roll paper conveying unit and comprises a rocker arm type film drawing machine, a roll paper cylinder carrying and rotating device, a film drawing automatic tail cutting device and a film drawing and packaging electric control device;

the rocker arm type film drawing machine comprises a rocker arm supporting frame, a rocker arm and a film frame; the rocker arm comprises a horizontal section and a vertical section, the horizontal section is arranged on the rocker arm supporting frame through a vertically arranged rotating shaft, the axial lead of the rotating shaft is arranged right opposite to the geometric center of the roll paper film drawing and packaging section of the roll paper conveying unit, a rotating driving motor is arranged on the rotating shaft, the vertical section is fixedly arranged at the end part of the horizontal section, a film frame comprising a vertically arranged packaging film roll supporting rod is arranged on the vertical section of the rocker arm, and the height dimension of the film frame corresponds to the height dimension of the axial lead of the roll paper;

the roll paper tube supporting and rotating device comprises a lifting roller horizontally arranged below the ground, the lifting roller with the central axis arranged along the front and back direction is symmetrically arranged into two pieces left and right relative to a roll paper film-drawing packaging section of a roll paper conveying unit, the lifting roller comprises a lifting guide mechanism I and a lifting driving mechanism I, and at least one lifting roller is also provided with a roller rotating driving motor;

the automatic film-drawing and tail-cutting device is horizontally arranged below the ground on the left side or the right side of a roll paper film-drawing packaging section of the roll paper conveying unit and comprises a supporting underframe, a shear type automatic clamping part, an automatic film-drawing and tail-cutting part and an automatic adhesive tape sticking part; the support underframe is arranged below the ground through a sliding guide mechanism I and a sliding driving mechanism I which are arranged along the front-back direction; the shear type automatic clamping part comprises a supporting seat, a fixed clamping plate, a swinging clamping plate and a swinging driving part, wherein the supporting seat is arranged on a supporting underframe through a lifting guide mechanism II and a lifting driving mechanism II which are arranged along the vertical direction; the film drawing automatic tail cutting part comprises a lifting frame, a pushing vertical frame and an arc-shaped pressing plate, the lifting frame is arranged on a supporting bottom frame through a lifting guide mechanism III and a lifting driving mechanism III which are arranged along the vertical direction, the lifting frame is positioned in front of or behind the shearing type automatic clamping part corresponding to the rotation direction of the rocker arm, the pushing vertical frame is arranged on the lifting frame through a sliding guide mechanism II and a sliding driving mechanism II which are arranged along the left and right directions, the arc-shaped diameter size of the arc-shaped pressing plate is matched with the outer diameter size of the roll paper, the arc-shaped circle center position of the arc-shaped pressing plate is arranged corresponding to the axis position of the roll paper, the arc-shaped pressing plate is fixedly arranged on the pushing vertical frame, a plurality of pressing wheels which are arranged in a rolling manner along the front and back direction are uniformly distributed on the arc-shaped pressing plate along the arc-shaped direction, and a film drawing cutting edge, a film cutting edge, a, The protruding height of the cutting edge of the film drawing and cutting edge in the direction facing the arc-shaped circle center of the arc-shaped pressing plate is smaller than the protruding height of the pressing wheel in the direction facing the arc-shaped circle center of the arc-shaped pressing plate; the automatic adhesive tape pasting part comprises a mounting vertical plate, a main pressure welding pasting roller, an adhesive tape guide roller, an adhesive tape roll mounting seat, an auxiliary pressure welding pasting roller and an adhesive tape cutting blade, the mounting vertical plate which is positioned in front of or behind the pushing vertical frame and corresponds to the rotation direction of the rocker arm is fixedly mounted on the pushing vertical frame, the main pressure welding pasting roller is mounted on the upper part of the mounting vertical plate through a telescopic control part I which is arranged in a telescopic mode along the left-right direction, the axial direction of the main pressure welding pasting roller is arranged along the front-back direction, the auxiliary pressure welding pasting roller with the central axis parallel to the main pressure welding pasting roller is arranged below or above the main pressure welding pasting roller and corresponds to the rotation direction of the lifting roller, the auxiliary pressure welding pasting roller is mounted on the mounting vertical plate through a telescopic control part II which is arranged in a telescopic mode along the left-right direction, the adhesive tape cutting blade is arranged between the main pressure welding pasting roller and the auxiliary pressure welding pasting roller, The adhesive tape cutting edge is arranged on the mounting vertical plate through a telescopic control component III which is arranged in a telescopic mode along the left and right directions, and an adhesive tape guide roller and an adhesive tape roll mounting seat, of which the central axes are parallel to the main compression bonding roller, are arranged on the mounting vertical plate;

the film drawing and packaging electric control device comprises a film drawing and packaging controller, a film drawing machine control loop, a paper roll carrying and rotating control loop and a film drawing automatic tail cutting control loop, wherein the film drawing and packaging controller is respectively electrically connected with a rotary driving motor of a rocker arm type film drawing machine, a lifting driving mechanism I of a lifting roller, a roller rotating driving motor of the lifting roller, a sliding driving mechanism I of a supporting chassis, a lifting driving mechanism II of a supporting seat, a swinging driving part of a swinging clamping plate, a lifting driving mechanism III of a lifting frame, a sliding driving mechanism II of a pushing vertical frame, a telescopic control part I of a main pressure welding and pasting roller, a telescopic control part II of an auxiliary pressure welding and pasting roller and a telescopic control part III of a tape cutting blade;

the centralized electric control unit comprises a central controller, an automatic roll paper conveying control loop, an automatic roll paper weighing control loop, an automatic printing and pasting label control loop and a roll paper film-drawing packaging control loop, wherein the central controller is respectively and electrically connected with the roll paper conveying controller, the automatic weighing controller, the automatic label printing and pasting controller and the film-drawing packaging controller;

before a roll paper film drawing packaging line is used for packaging roll paper products, in an initial state, a film frame of a rocker arm type film drawing machine is stopped at the position on the same side with an automatic film drawing and cutting device through a rocker arm, a lifting roller of a roll paper tube carrying and rotating device is positioned at the lower position of a lifting stroke of a lifting guide mechanism I below the carrying surface of a roll paper film drawing packaging section of a roll paper conveying unit, a supporting bottom frame of the automatic film drawing and cutting device is positioned at the front section or the rear section of a sliding stroke of the sliding guide mechanism I corresponding to the rotating direction of the rocker arm, a supporting seat of a shear type automatic clamping part is positioned at the lower position of the lifting stroke of a lifting guide mechanism II, a swing clamping plate is positioned at the horizontal state separated from a fixed clamping plate, a lifting frame of the automatic film drawing and cutting part is positioned at the lower position of the lifting stroke of the lifting guide mechanism III, and a pushing vertical frame is positioned at the left end or the right end of the sliding stroke of the sliding guide mechanism II, the main compression joint pasting roller, the auxiliary compression joint pasting roller and the adhesive tape cutting blade of the automatic adhesive tape pasting part are all in a completely retracted state;

the film-drawing packaging method specifically comprises the following steps:

a. preparing for packaging: an operator firstly controls a central controller to call relevant specification data including gram weight, grade and paper core diameter for a batch of roll paper products, then the operator sleeves a packaging film roll on a packaging film roll supporting rod and draws out a packaging film end of the packaging film roll, the packaging film end is attached to a fixed clamping plate of a scissor type automatic clamping part after a supporting seat of the scissor type automatic clamping part is controlled to rise by a film pulling packaging controller, then the swing driving part is controlled by the film pulling packaging controller to act to enable the swing clamping plate and the fixed clamping plate to be in a closed clamping state, the packaging film end is clamped on the scissor type automatic clamping part, then the operator installs an adhesive tape roll on an adhesive tape roll mounting seat, draws out the end part of the adhesive tape and wraps around an adhesive tape guide roller to be overlapped on a main compression bonding roller;

b. automatic weighing and one-time automatic printing and labeling: the central controller starts an automatic roll paper conveying control loop, the roll paper conveying controller controls a roll paper input section of a roll paper conveying unit and a roll paper weighing section of a roll paper driving motor to synchronously act and convey forwards, roll paper which finishes a roll cutting process sequentially enters the roll paper input section at intervals, and after a first roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section and the roll paper weighing section to synchronously stop conveying for standby; the central controller controls and starts an automatic roll paper weighing control loop, after the automatic weighing controller sends weight data of a first roll paper fed back by the electronic platform scale to the central controller, the central controller starts an automatic printing and label pasting control loop, the automatic label printing and pasting controller prints and outputs a gum label by an automatic printing and marking machine of a roll paper weighing section label printing and pasting part and controls a gas circuit control valve of a label negative pressure grabbing device of the roll paper weighing section label printing and pasting part to open and then controls a coordinate driving mechanism of a label automatic pasting mechanical arm of the roll paper weighing section label printing and pasting part to act so that a label automatic pasting mechanical arm coordinate of the roll paper weighing section label printing and pasting part moves to carry out negative pressure adsorption grabbing on the gum label, after grabbing the gum label, the label automatic printing and sticking controller controls the coordinate driving mechanism of the label automatic sticking mechanical arm of the label automatic sticking part of the roll paper weighing section label printing and sticking part to act so that the label automatic sticking mechanical arm moves to the set sticking position of the first roll paper for sticking the label by adsorbing the gum label coordinate, and after the sticking is completed, the label automatic printing and sticking controller firstly controls the air passage control valve of the label negative pressure grabbing device of the label printing and sticking part of the roll paper weighing section label printing and sticking part to close and then controls the coordinate driving mechanism of the label automatic sticking mechanical arm of the roll paper weighing section label printing and sticking part to act for resetting, so that one-time automatic printing and sticking of the first roll paper is completed;

c. and (3) film pulling and packaging: the roll paper conveying controller controls a roll paper input section, a roll paper weighing section and a roll paper film-drawing packaging section of the roll paper conveying unit to synchronously act and convey forwards, and after a first roll paper enters the roll paper film-drawing packaging section and a subsequent second roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section and the roll paper film-drawing packaging section to synchronously stop conveying for standby; when a second roll paper is printed and labeled once automatically, the central controller controls and starts a roll paper film-drawing packaging control loop, the film-drawing packaging controller firstly controls the lifting driving mechanism I of the lifting roller to act to jack the lifting roller and stably support and carry the first roll paper, then the film-drawing packaging controller controls the rotary driving motor of the rocker arm type film-drawing machine to act to drive the rocker arm to drive the film frame to rotate around the axial lead of the rotary shaft, the rocker arm draws the packaging film roll and releases the packaging film in the rotating process, the packaging film is sequentially wound according to the sequence of end face-cylinder-end face-cylinder, when the rocker arm draws the packaging film through the film frame to wrap at least one roll paper end face wound in the first circle, the film-drawing packaging controller firstly controls the swing driving part to act to reset the swing clamping plate to the initial state, and then controls the supporting seat of the shear type automatic clamping part to reset to the initial state, Then controlling a supporting underframe of the automatic film-drawing and tailing-cutting device to reversely slide to a rear section of a sliding stroke or a front section of the sliding stroke, and enabling the end of the packaging film to be separated from the scissor-type automatic clamping part and to be wrapped in the packaging film in the process of continuing rotation of the rocker arm; when the rocker arm pulls the packaging film through the film frame to enable the packaging film to at least complete the first circle of winding, the film pulling packaging controller controls a roller rotation driving motor of a lifting roller to start, the lifting roller drives a first piece of roll paper to rotate, the rotation speed of the lifting roller is controlled by matching with the rotation speed of the rocker arm, the step pitch that the width size of the first piece of roll paper is smaller than that of one packaging film in a stepping rotation mode after the packaging film is wound around the roll paper for one circle is achieved, and the film pulling packaging of the outer surface of the whole first piece of roll paper is completed after the first piece of roll paper rotates for one circle;

after the first roll paper is subjected to film drawing and packaging on the whole outer surface, a film drawing and packaging controller firstly controls a rotary driving motor of a rocker arm type film drawing machine and a roller rotary driving motor of a lifting roller to stop acting at the same time and then controls a supporting seat of a shear type automatic clamping part to rise, a rocker arm drives a film frame to gradually slow down and stop at an initial position, meanwhile, a packaging film is attached to a fixed clamping plate of the shear type automatic clamping part under the drawing action of the film frame, and then the film drawing and packaging controller controls a swing driving part to act so that the swing clamping plate and the fixed clamping plate are in a closed clamping state to position and clamp the packaging film on the shear type automatic clamping part; then the film-drawing packaging controller controls the lifting frame of the film-drawing automatic tail-cutting part to lift up and controls the pushing vertical frame to extend out in the direction close to the first roll paper, the packaging film close to the end part of the first roll paper is pressed on the outer surface of the first roll paper by the pressing wheel on the arc-shaped pressing plate, then the film-drawing packaging controller controls the supporting bottom frame of the film-drawing automatic tail-cutting device to positively slide for setting a step pitch, the pressing wheel rolls in the positive sliding process of the supporting bottom frame, and the packaging film clamped on the shearing type automatic clamping part is abutted against the film-drawing cutting edge under the rolling force of the pressing wheel and the pulling force of the arc-shaped pressing plate and is cut by the film-drawing cutting edge under the tension action, so that the film-drawing automatic tail cutting of the packaging film is completed;

then the film-drawing packaging controller controls the pushing vertical frame to retract reversely to a set step distance to enable the pressing wheel to be separated from the outer surface of the first roll paper, controls the main pressing and pasting roller to extend out and abut against the outer surface of the first roll paper, enables the end part of the adhesive tape lapped on the main pressing and pasting roller to be extruded and pasted on the cut tail packaging film by the main pressing and pasting roller, controls the film-drawing packaging controller to start a roller rotating driving motor of a lifting roller, controls the auxiliary pressing and pasting roller to extend out and abut against the outer surface of the first roll paper, controls the main pressing and pasting roller to retract reversely to a set step distance to enable the main pressing and pasting roller to be separated from the outer surface of the first roll paper, and enables the adhesive tape to be pressed and pasted on the outer surface of the first roll paper through the auxiliary pressing and pasting roller in the rotating process of the first roll paper; after the first roll paper rotates for at least one circle, the film-drawing packaging controller firstly controls a roller rotation driving motor for closing the lifting roller and then controls the adhesive tape cutting edge to extend to a set distance, the adhesive tape is cut by the extending adhesive tape cutting edge, and the film-drawing packaging controller controls the main compression joint pasting roller, the auxiliary compression joint pasting roller and the adhesive tape cutting edge to reset to finish the automatic pasting of the adhesive tape; finally, the film drawing packaging controller sequentially controls the pushing vertical frame and the lifting frame of the automatic film drawing and tail cutting part to reset to an initial state, controls the supporting bottom frame of the automatic film drawing and tail cutting device to reset to the initial state for standby, and controls the lifting roller to fall and reset to the initial state to complete the whole film drawing packaging process of the first roll paper;

d. outputting and secondary automatic printing and labeling: the roll paper conveying controller controls a roll paper input section, a roll paper weighing section, a roll paper film-drawing packaging section and a roll paper output section of the roll paper conveying unit to synchronously act and convey forwards, and after a first roll paper enters the roll paper output section, a subsequent second roll paper enters the roll paper film-drawing packaging section and a subsequent third roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roll paper output section to synchronously stop conveying for standby; when the second roll paper is subjected to film drawing packaging and the third roll paper is subjected to one-time automatic printing and labeling, the label automatic printing and labeling controller prints and outputs the relevant specification data of the grammage, the grade and the core diameter and the weight data of the first roll paper through the automatic printing mark discharging machine of the label printing and labeling part of the roll paper output section, then the label automatic printing and labeling controller firstly controls the air passage control valve of the label negative pressure grabbing device of the label printing and labeling part of the roll paper output section to be opened and then controls the coordinate driving mechanism of the label automatic labeling mechanical arm of the label printing and labeling part of the roll paper output section to act so that the label automatic labeling mechanical arm of the label printing and labeling part of the roll paper output section moves to perform negative pressure adsorption and grabbing on the back adhesive label, and after the back adhesive label is grabbed, the label automatic printing and labeling controller controls the coordinate driving mechanism of the label automatic labeling mechanical arm of the label printing and labeling part of the roll paper output section label printing and labeling part to act The label automatic pasting manipulator moves to a set labeling position of a first roll of paper by adsorbing the coordinates of the gum label to carry out secondary labeling, and after the secondary labeling is finished, the label automatic printing and pasting controller firstly controls a gas circuit control valve of a label negative pressure gripping device of a label printing and pasting part of a roll paper output section to be closed and then controls a coordinate driving mechanism of a label automatic pasting mechanical arm of the label printing and pasting part of the roll paper output section to act to reset, so that the secondary automatic printing and labeling of the first roll of paper is finished; after the first roll paper is subjected to secondary automatic printing and labeling, the central controller independently controls a roller driving motor at the roll paper output section to act so as to output the first roll paper forwards;

and the continuous packaging operation of the batch roll paper is realized by analogy.

Compared with the prior art, the web film-drawing packaging method utilizes the structural characteristics of a cylindrical product of web paper, the web paper horizontally arranged in the axial direction is wound with the packaging film in the circumferential direction along the horizontal diameter direction, the packaging film is wound around the web paper tube and is driven to rotate around the central axis, the rotating speed of the lifting roller can be controlled by the aid of the web paper carrying and rotating device matched with the rotating speed of the rocker arm type film-drawing machine, the step pitch of the web paper stepping rotation smaller than the width size of one packaging film after the packaging film is wound around the web paper tube for one circle is realized, the web paper stepping rotation for one circle can be realized, the web film-drawing packaging of the outer surface of the whole web paper comprising two web paper end surfaces is completed, meanwhile, the automatic film-drawing tail-cutting and the automatic adhesive tape pasting after the tail-cutting can be realized by the automatic film-drawing tail-cutting device, and the supporting underframe of the automatic film-drawing tail-cutting device is driven to slide through the sliding guide mechanism I and the sliding driver The moving mechanism I is arranged below the ground, so that before the roll paper is subjected to film drawing packaging, the rotating direction of a shear type automatic clamping part of the film drawing automatic tail cutting device, which clamps the end of the packaging film, corresponding to the rocker arm is close to the winding starting end face of the roll paper, after the film drawing packaging of the outer surface of the whole roll paper is finished, the rotating direction of a shear type automatic clamping part of the film drawing automatic tail cutting device, which corresponds to the rocker arm, is close to the winding ending end face of the roll paper, so that the packaging film is clamped, and the film drawing automatic tail cutting and the adhesive tape automatic sticking after the tail cutting are carried out through the film drawing automatic tail cutting part and the automatic adhesive tape sticking part of the film drawing automatic tail cutting device, so that the waste amount of the packaging film is greatly reduced, and the utilization rate of the packaging film is greatly improved; the automatic weighing unit is arranged, so that the online weighing of the roll paper before film drawing and packaging can be realized; the automatic label printing and pasting unit is arranged, so that the automatic label printing and pasting unit can realize the automatic printing of the web twice in real time before the film drawing and packaging and the automatic label printing and pasting of product information including online weighing data and the like on the surface of the web; the roll paper film-drawing packaging line can effectively reduce the labor intensity of operators and reduce the occupation of packaging space on the premise of effectively packaging finished roll paper, and is particularly suitable for packaging the finished roll paper output by a paper machine.

Drawings

FIG. 1 is a schematic three-dimensional structure of a web stretch film packaging line;

FIG. 2 is a schematic representation of the three-dimensional structure of a web weighing section of the present invention;

FIG. 3 is a schematic three-dimensional representation of a web output section of the present invention;

fig. 4 is a schematic three-dimensional structure of a label automatic-pasting robot for a label printing-pasting part of a web output section according to the present invention;

FIG. 5 is a schematic three-dimensional view of the perforation device of the present invention;

FIG. 6 is a schematic three-dimensional structure of a web-stretch wrap segment of the present invention;

FIG. 7 is a schematic diagram of a three-dimensional structure of the combination of the supporting and carrying rotary device of the paper winding cylinder and the automatic tail cutting device of the film drawing of the invention;

FIG. 8 is a schematic three-dimensional structure diagram of a left front view angle when the automatic film drawing and tailing device of the invention is arranged on the left side of a roll paper film drawing and packaging section and a rocker arm of a rocker arm type film drawing machine rotates anticlockwise;

FIG. 9 is a schematic three-dimensional structure diagram of a left rear viewing angle when the film drawing and automatic tail cutting device of the invention is arranged on the left side of a roll paper film drawing and packaging section and a rocker arm of a rocker arm type film drawing machine rotates anticlockwise;

FIG. 10 is a schematic diagram of a three-dimensional structure of a right front view angle when the automatic film drawing and tailing device of the invention is arranged on the left side of a roll paper film drawing and packaging section and a rocker arm of a rocker arm type film drawing machine rotates anticlockwise;

fig. 11 is a partially enlarged view of fig. 10.

In the figure: 1. a roll paper conveying unit, 2, an automatic weighing unit, 21, an electronic platform scale, 3, an automatic label printing and pasting unit, 31, an automatic label printing and outputting machine, 32, an automatic label pasting mechanical arm, 33, an automatic label pasting mechanical arm, 34, a perforating device, 341, a pressure plate, 342, a perforating shaft, 343, a puncture rod, 344, a top sleeve, 345, a packaging film waste collecting barrel, 35, a roll paper detecting device, 4, a film drawing and packaging unit, 41, a rocker arm type film drawing machine, 411, a rocker arm supporting frame, 412, a rocker arm, 413, a film frame, 42, a roll paper barrel supporting and rotating device, 421, a lifting roller, 43, an automatic film drawing and cutting device, 431, a supporting bottom frame, 432, a scissor type automatic clamping part, 4321, a supporting seat, 4322, a fixed clamping plate, 4323, a swinging clamping plate, 4324, a swinging driving part, 433, an automatic film drawing and cutting part, 4331, 4332 and a pushing vertical frame, 4333. the automatic adhesive tape sticking device comprises an arc-shaped pressing plate, 4334, a pressing wheel, 4335, a film pulling and cutting edge, 434, an automatic adhesive tape sticking part, 4341, a mounting vertical plate, 4342, a main pressing and sticking roller, 4343, an adhesive tape guide roller, 4344, an adhesive tape roll mounting seat, 4345, an auxiliary pressing and sticking roller, 4346 and an adhesive tape cutting edge.

Detailed Description

The present invention will be further described with reference to the drawings (hereinafter, the web is described with the web transport direction as the forward direction, and the horizontal left-right direction as the X coordinate, the horizontal front-rear direction as the Y coordinate, the vertical up-down direction as the Z coordinate, the direction of rotation around the X coordinate as the rotation center as the a coordinate, the direction of rotation around the Y coordinate as the rotation center as the B coordinate, and the direction of rotation around the Z coordinate as the rotation center as the C coordinate).

As shown in fig. 1, the roll paper stretch film packaging line includes a roll paper conveying unit 1, an automatic weighing unit 2, a label automatic printing and pasting unit 3, a stretch film packaging unit 4, and a centralized electronic control unit.

The roll paper conveying unit 1 comprises a conveying device and a roll paper conveying electric control device. The conveying device is a multi-section conveying structure which is connected end to form a whole linear structure conveying line, the multi-section conveying structure sequentially comprises a roll paper input section, a roll paper weighing section, a roll paper film drawing packaging section and a roll paper output section from back to front, the conveying device is a belt conveying structure or a roller arrangement type conveying structure comprising a roller driving motor, taking the belt conveying structure as an example, the roll paper input section, the roll paper weighing section, the roll paper film drawing packaging section and the roll paper output section respectively at least comprise a front supporting roller, a rear supporting roller and a conveying belt, the front supporting roller and the rear supporting roller which are arranged in a rolling manner along the front and rear directions are arranged in a front and rear parallel opposite mode, the conveying belt is closed at the end to form a ring shape and is installed on the front supporting roller and the rear supporting roller in a matched and sleeved mode, the conveying belt is supported by the front supporting roller and the rear supporting roller to form an upper layer and a lower layer, and the roll paper can be conveniently conveyed up and down, the belt type conveying device is horizontally arranged below the ground, and the bearing surface of the upper layer conveying belt of the conveying belt is flush with the ground; the roller driving motor is arranged on the front supporting roller and/or the rear supporting roller; in order to stably support and convey the roll paper, a carrying roller which can be arranged in a rolling manner along the front-back direction can be arranged between the front supporting roller and the rear supporting roller; the conveying belt can be of a conveying rubber belt structure or a conveying chain belt structure; in order to avoid the situation that the roll paper rolls to separate from the conveying belt in the conveying process, when the conveying belt with the conveying belt structure is adopted, the three supporting rollers are sequentially connected into a group of supporting roller sets with an inverted trapezoidal structure, the supporting roller sets are uniformly distributed and arranged in multiple groups along the front and back directions, and the roll paper can press the conveying belt on the supporting roller sets with the inverted trapezoidal structure to realize stable supporting; in order to avoid the phenomenon that the roll paper rolls to separate from the conveying belt in the conveying process, when the conveying belt with the conveying chain belt structure is adopted, the bearing surface of each section of chain belt plate is of an arc surface structure matched with the outer diameter of the roll paper, and the roll paper can be clamped on the arc surface structure of the chain belt plate to realize stable bearing; in order to realize stable continuous carrying, transition rollers which are arranged in a rolling manner along the front-back direction are positioned at the butt joint positions of the adjacent roll paper input section, the roll paper weighing section, the roll paper film drawing and packaging section and the roll paper output section. When the conveying device of the roller-arranging type conveying structure with the plurality of carrying rollers arranged side by side is adopted, the roller driving motor is arranged on the carrying rollers, and the roller surfaces of the carrying rollers can be arc-shaped roller surface structures matched with the outer diameter size of roll paper. The roll paper conveying electric control device comprises a roll paper conveying controller and a roll paper conveying control loop, wherein the roll paper conveying controller is electrically connected with roller driving motors of the roll paper input section, the roll paper weighing section, the roll paper film drawing packaging section and the roll paper output section respectively.

As shown in fig. 2, the automatic weighing unit 2 is disposed corresponding to a web weighing section of the web conveying unit 1, and includes an electronic scale 21 and a weighing electric control device. The electronic scale 21 is horizontally positioned and installed right below the roll paper weighing section of the roll paper conveying unit 1. The weighing electric control device comprises an automatic weighing controller and a weighing control loop, and the automatic weighing controller is electrically connected with the electronic scale 21.

As shown in fig. 2 and 3, the label automatic printing and pasting unit 3 comprises a web weighing segment label printing and pasting part, a web output segment label printing and pasting part and a label automatic printing and pasting electric control device; the label printing and pasting part of the roll paper weighing section is correspondingly arranged on the left side or the right side of the roll paper weighing section of the roll paper conveying unit 1, and the label printing and pasting part of the roll paper output section is correspondingly arranged on the left side or the right side of the roll paper output section of the roll paper conveying unit 1.

The label printing and pasting part of the roll paper weighing section and the label printing and pasting part of the roll paper output section respectively comprise an automatic printing and marking machine 31, an automatic label pasting mechanical arm 32 and an automatic label pasting mechanical arm 33; the automatic printing and marking machine 31 is installed on the ground through the marking machine base, and the automatic printing and marking machine 31 can realize automatic printing and output of the back adhesive label (the automatic printing and marking machine 31 is the prior art, and detailed description is not given here); the automatic label pasting mechanical arm 32 is correspondingly arranged near the automatic printing and marking machine 31, and the automatic label pasting mechanical arm 32 at least comprises an X coordinate driving mechanism moving along the horizontal left-right direction and a Z coordinate driving mechanism moving along the vertical up-down direction; sign self-adhesive manipulator 33 installs on the end of sign self-adhesive arm 32, in order to increase the flexibility of sign self-adhesive manipulator 33, realize reducing the motion stroke of sign self-adhesive arm 32 under the prerequisite of firm sign of pasting, sign self-adhesive manipulator 33 can install on the end of sign self-adhesive arm 32 through being rotatory B coordinate rotation drive assembly of rotation center along Y coordinate axis and/or being rotatory A coordinate rotation drive assembly of rotation center along X coordinate axis, sign self-adhesive manipulator 33 includes sign negative pressure grabbing device, sign negative pressure grabbing device includes the suction cup through sucking disc support mounting, the suction cup passes through the gas circuit pipeline and is connected with the negative pressure source with the gas circuit control valve.

The automatic label printing and sticking electric control device comprises an automatic label printing and sticking controller, an automatic label printing control loop and an automatic label sticking control loop, wherein the automatic label printing and sticking controller is respectively and electrically connected with the automatic printing and marking machine 31, a coordinate driving mechanism of an automatic label sticking mechanical arm 32, a coordinate rotation driving assembly of an automatic label sticking mechanical arm 33 and an air path control valve of a negative-pressure label grabbing device.

As shown in fig. 6, the stretch film packaging unit 4 is disposed corresponding to the roll paper stretch film packaging section of the roll paper conveying unit 1, and includes a rocker arm type stretch film machine 41, a roll paper tube carrying and rotating device 42, a stretch film automatic tail cutting device 43, and a stretch film packaging electric control device.

The rocker arm type film drawing machine 41 comprises a rocker arm supporting frame 411, a rocker arm 412 and a film frame 413; the rocker arm 412 comprises a horizontal section and a vertical section, the horizontal section is installed on the rocker arm supporting frame 411 through a vertically arranged rotating shaft, the axis of the rotating shaft is arranged right to the geometric center of the roll paper film drawing and packaging section of the roll paper conveying unit 1, a rotary driving motor is arranged on the rotating shaft, the vertical section is fixedly arranged at the end part of the horizontal section, a film frame 413 comprising a vertically arranged packaging film roll supporting rod is installed on the vertical section of the rocker arm 412, the height dimension of the film frame 413 corresponds to the height dimension of the axis of the roll paper, in order to achieve the universality of roll paper with different outer diameter dimensions, the film frame 413 is installed on the vertical section of the rocker arm 412 through a height adjusting mechanism, the height adjusting mechanism can be a positioning pin and a positioning hole structure which are arranged in a matched mode, and can also be other height adjusting structures such as an electric cylinder structure.

The roll paper tube supporting and rotating device 42 comprises a lifting roller 421 horizontally installed below the ground, the lifting roller 421 with a central axis arranged along the front-back direction is arranged in two pieces in bilateral symmetry relative to the roll paper film-drawing packaging section of the roll paper conveying unit 1, the lifting roller 421 comprises a lifting guide mechanism I and a lifting driving mechanism I, the lifting guide mechanism I can be a sliding rail structure arranged in a matching way or other linear sliding guide structures such as a guide wheel and a guide rail structure arranged in a matching way, the lifting driving mechanism I can be a hydraulic cylinder structure, an electric cylinder structure or other lifting structures such as a matched gear rack structure, a roller rotating driving motor is further arranged on at least one lifting roller 421, in order to realize the universality of roll paper with different outer diameter sizes, a distance adjusting mechanism capable of synchronously adjusting the distance relative to the geometric center of the roll paper film-drawing packaging section of the roll paper conveying unit 1 is further arranged between the two lifting rollers 421, the distance adjusting mechanism can be a telescopic cylinder structure or an electric cylinder structure which is respectively arranged along the left and right directions, and can also be other distance adjusting structures such as a stud bolt structure and a nut structure which are arranged in a matching way.

As shown in fig. 7, the stretch film automatic tail cutter 43 is horizontally installed below the ground on the left or right side of the roll film stretch packaging section of the roll paper conveying unit 1, and includes a supporting base frame 431, a scissor type automatic clamping part 432, a stretch film automatic tail cutter part 433, and an automatic adhesive tape sticking part 434; as shown in fig. 8 to 10, the supporting chassis 431 is installed below the ground through a sliding guide mechanism i and a sliding driving mechanism i arranged along the front-back direction, the sliding guide mechanism i may be a sliding rail structure arranged in a matching manner, or other linear sliding guide structures such as a guide wheel and a guide rail structure arranged in a matching manner, the sliding driving mechanism i may be a hydraulic cylinder or an air cylinder or an electric cylinder structure, or a gear rack structure driven by an electric motor, or other linear reciprocating driving structures such as a belt transmission structure driven by an electric motor; the scissor type automatic clamp portion 432 includes a support base 4321, a fixed clamp plate 4322, a swing clamp plate 4323 and a swing drive part 4324, the support base 4321 is mounted on the support base 431 by a lifting guide mechanism ii and a lifting drive mechanism ii arranged in a vertical direction, the vertically arranged fixed clamp plate 4322 is fixedly arranged on the support base 4321, the bottom of the swing clamp plate 4323 positioned on the left or right side of the fixed clamp plate 4322 is hinge-mounted on the support base 4321, a swing driving part 4324 capable of driving the swing clamping plate 4323 to change angles between a horizontal state and a vertical state is mounted on the supporting seat 4321, the swing driving part 4324 can be an air cylinder, a hydraulic cylinder, an electric cylinder structure, a rotary motor structure or other swing driving structures, when the swing clamping plate 4323 swings to be in the vertical state, the swing clamping plate 4323 and the fixed clamping plate 4322 are in a closed clamping state, and the length dimensions of the swing clamping plate 4323 and the fixed clamping plate 4322 can be both greater than the width dimension of the packaging film; the automatic film drawing and cutting part 433 comprises a lifting frame 4331, a pushing vertical frame 4332 and an arc-shaped pressing plate 4333, wherein the lifting frame 4331 is arranged on the supporting bottom frame 431 through a lifting guide mechanism III and a lifting driving mechanism III which are arranged along the vertical direction, the lifting frame 4331 is arranged in front of or behind the automatic shearing type clamping part 432 corresponding to the rotation direction of the rocker arm 412, the pushing vertical frame 4332 is arranged on the lifting frame 4331 through a sliding guide mechanism II and a sliding driving mechanism II which are arranged along the left-right direction, the arc-shaped diameter size of the arc-shaped pressing plate 4333 is matched with the outer diameter size of the roll paper, the arc-shaped circle center position of the arc-shaped pressing plate 4333 is arranged corresponding to the axis position of the roll paper, the arc-shaped pressing plate 4333 is fixedly arranged on the pushing vertical frame 4332, a plurality of pressing wheels 4334 which are arranged in a rolling manner along the front-back direction are uniformly distributed on the arc-shaped pressing plate 4333 along the arc-shaped direction, a plurality of film drawing and cutting blades which are uniformly distributed behind or in front of the arc-shaped pressing wheel 4334 corresponding to the rotation direction of the rocker arm 412, the cutting edge of the film cutting edge 4335 is arranged corresponding to the arc-shaped circle center of the arc-shaped pressing plate 4333, and the protruding height dimension of the cutting edge of the film cutting edge 4335 in the direction facing the arc-shaped circle center of the arc-shaped pressing plate 4333 is smaller than the protruding height dimension of the pressing wheel 4334 in the direction facing the arc-shaped circle center of the arc-shaped pressing plate 4333; as shown in fig. 11, the automatic adhesive tape applying section 434 includes an installation vertical plate 4341, a main pressure bonding roller 4342, an adhesive tape guide roller 4343, an adhesive tape roll installation seat 4344, an auxiliary pressure bonding roller 4345 and an adhesive tape cutting edge 4346 which are installed on the installation vertical plate 4341, the installation vertical plate 4341 which is located in front of or behind the pushing vertical frame 4332 corresponding to the rotation direction of the swing arm 412 is fixedly installed on the pushing vertical frame 4332, the main pressure bonding roller 4342 is installed on the upper portion of the installation vertical plate 4341 through a telescopic control part i which is telescopically installed in the left-right direction and is arranged in the front-rear direction along the axial direction of the main pressure bonding roller 4342, the telescopic control part i may be a hydraulic cylinder or an electric cylinder or other linear reciprocating structure such as a rack-and-pinion structure driven by an electric motor, and the auxiliary pressure bonding roller 4345 whose central axis is arranged in parallel to the main pressure bonding roller 4342 is arranged below or above the main pressure bonding roller 4342 corresponding to the rotation direction of the lifting roller 421, The auxiliary pressure-bonding pasting roller 4345 is installed on the installation vertical plate 4341 through a telescopic control part II which is arranged in a telescopic mode along the left-right direction, the adhesive tape cutting edge 4346 is arranged between the main pressure-bonding pasting roller 4342 and the auxiliary pressure-bonding pasting roller 4345, the adhesive tape cutting edge 4346 is installed on the installation vertical plate 4341 through a telescopic control part III which is arranged in a telescopic mode along the left-right direction, the adhesive tape guide roller 4343 and the adhesive tape roll installation seat 4344, which are arranged in parallel to the main pressure-bonding pasting roller 4342 in the central axis direction, are installed on the installation vertical plate 4341, and after the adhesive tape roll is installed on the adhesive tape roll installation seat 4344 in a sleeved mode, the end portion of the adhesive tape can be pulled out and wound around the adhesive tape guide roller 4343 to be connected to the main pressure-bonding pasting roller 4342 in a overlapped mode.

The film drawing packaging electric control device comprises a film drawing packaging controller, a film drawing machine control loop, a paper roll carrying rotary control loop and a film drawing automatic tail cutting control loop, wherein the film drawing packaging controller is electrically connected with a rotary driving motor of the rocker arm type film drawing machine 41, a lifting driving mechanism I of the lifting roller 421, a roller rotary driving motor of the lifting roller 421, a spacing adjusting mechanism of the lifting roller 421, a sliding driving mechanism I of the supporting underframe 431, a lifting driving mechanism II of the supporting seat 4321, a swinging driving part 4324 of the swinging clamping plate 4323, a lifting driving mechanism III of the lifting frame 4331, a sliding driving mechanism II of the pushing vertical frame 4332, a telescopic control part I of the main crimping and adhering roller 4342, a telescopic control part II of the auxiliary crimping and adhering roller 4345 and a telescopic control part III of the adhesive tape cutting edge 4346 respectively.

The centralized electric control unit comprises a central controller, a roll paper automatic conveying control loop, a roll paper automatic weighing control loop, an automatic printing and pasting label control loop and a roll paper film-drawing packaging control loop, wherein the central controller is respectively and electrically connected with the roll paper conveying controller, the automatic weighing controller, the label automatic printing and pasting controller and the film-drawing packaging controller.

Before a roll paper product is packaged by using a roll paper film-drawing packaging line, in an initial state, a film frame 413 of a rocker arm type film-drawing machine 41 is stopped at the same side with an automatic film-drawing and tail-cutting device 43 through a rocker arm 412, a lifting roller 421 of a roll paper tube carrying and rotating device 42 is positioned at the lower position of the lifting stroke of a lifting guide mechanism I below the carrying surface of a roll paper film-drawing packaging section of a roll paper conveying unit 1, a support bottom frame 431 of the automatic film-drawing and tail-cutting device 43 is positioned at the front section or the rear section of the sliding stroke of the sliding guide mechanism I corresponding to the rotating direction of the rocker arm 412 (if the automatic film-drawing and tail-cutting device 43 is positioned at the left side of the roll paper film-drawing packaging section and the rocker arm 412 rotates anticlockwise, the support bottom frame 431 of the automatic film-drawing and tail-cutting device 43 is positioned at the rear section of the sliding stroke of the sliding guide mechanism I; if the automatic film-drawing and tail-cutting device 43 is positioned at the left side of the roll paper film-drawing packaging section, And the rocker 412 rotates clockwise, the supporting chassis 431 of the film-drawing automatic tail-cutting device 43 is positioned at the front section of the sliding stroke of the sliding guide mechanism I; if the film-pulling automatic tail-cutting device 43 is positioned at the right side of the roll paper film-pulling packaging section and the rocker 412 rotates anticlockwise, the supporting bottom frame 431 of the film-pulling automatic tail-cutting device 43 is positioned at the front section of the sliding stroke of the sliding guide mechanism I; if the automatic film drawing and tail cutting device 43 is positioned on the right side of the roll paper film drawing and packaging section and the rocker arm 412 rotates clockwise, the supporting bottom frame 431 of the automatic film drawing and tail cutting device 43 is positioned on the rear section of the sliding stroke of the sliding guide mechanism I), the supporting seat 4321 of the automatic scissors-type clamping part 432 is positioned at the lower position of the lifting stroke of the lifting guide mechanism II, the swinging clamping plate 4323 is in a horizontal state separated from the fixed clamping plate 4322, the lifting frame 4331 of the automatic film drawing and tail cutting part 433 is positioned at the lower position of the lifting stroke of the lifting guide mechanism III, the pushing vertical frame 4332 is positioned at the left end or the right end of the sliding stroke of the sliding guide mechanism II, and the main pressure welding and adhering roller 4342, the auxiliary pressure welding and adhering roller 4345 and the tape cutting edge 4346 of the automatic adhesive tape part 434 are all in a fully retracted state;

preparing for packaging: an operator firstly controls a central controller to call relevant specification data of gram weight, grade, paper core diameter and the like of a batch of roll paper products, then the operator sleeves a packaging film roll on a packaging film roll supporting rod and extracts a packaging film end of the packaging film roll, the supporting seat 4321 of the scissor type automatic clamping part 432 is controlled by a film pulling packaging controller to lift, then the packaging film end is attached to the fixed clamping plate 4322 of the scissor type automatic clamping part 432, the swinging driving part 4324 is controlled by the film pulling packaging controller to act so that the swinging clamping plate 4323 and the fixed clamping plate 4322 are in a closed clamping state, the packaging film end is clamped on the scissor type automatic clamping part 432, as shown in fig. 11, and then the operator installs the adhesive tape roll on an adhesive tape roll mounting seat 4344, extracts the adhesive tape end, and overlaps the adhesive tape end on the main pressure welding pasting roller 4342 after passing through the adhesive tape guide roller 4343;

automatic weighing and one-time automatic printing and labeling: the central controller starts an automatic roll paper conveying control loop, the roll paper conveying controller controls a roll paper input section of the roll paper conveying unit 1 and a roll paper weighing section to synchronously act so that a front supporting roll and/or a rear supporting roll drive a conveying belt to convey forwards, roll paper which finishes a roll cutting process sequentially enters the roll paper input section at intervals, and after a first roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section and the roll paper weighing section to synchronously stop conveying for standby; the central controller controls and starts an automatic roll paper weighing control loop, after the automatic weighing controller sends weight data of a first roll paper fed back by the electronic platform scale 21 to the central controller, the central controller starts an automatic printing and label pasting control loop, the automatic label printing and pasting controller prints and outputs a gum label by an automatic printing and marking machine 31 of a roll paper weighing section label printing and pasting part and the weight data of the first roll paper, then the automatic label printing and pasting controller controls an air passage control valve of a label negative pressure grabbing device of the roll paper weighing section label printing and pasting part to open and controls a coordinate driving mechanism of an automatic label pasting mechanical arm 32 of the roll paper weighing section label printing and pasting part to act so that a label automatic pasting mechanical arm 33 of the roll paper weighing section label printing and pasting part moves to perform negative pressure adsorption and grabbing on the gum label, after grabbing the gum label, the label automatic printing and sticking controller controls the coordinate driving mechanism of the label automatic sticking mechanical arm 32 of the label printing and sticking part of the roll paper weighing section label to act so that the label automatic sticking mechanical arm 33 moves to the set sticking position of the first roll paper for sticking the label by adsorbing the gum label coordinate, after the sticking is completed, the label automatic printing and sticking controller firstly controls the air path control valve of the label negative pressure grabbing device of the label printing and sticking part of the roll paper weighing section label to close, and then controls the coordinate driving mechanism of the label automatic sticking mechanical arm 32 of the label printing and sticking part of the roll paper weighing section label to act to reset, so that one-time automatic printing and sticking of the first roll paper is completed;

and (3) film pulling and packaging: the roll paper conveying controller controls a roll paper input section, a roll paper weighing section and a roll paper film-drawing packaging section of the roll paper conveying unit 1 to synchronously act so that a front supporting roll and/or a rear supporting roll drive a conveying belt to convey forwards, and after a first roll paper enters the roll paper film-drawing packaging section and a subsequent second roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section and the roll paper film-drawing packaging section to synchronously stop conveying for standby; as shown in fig. 7, the film-drawing packaging controller firstly controls the lifting driving mechanism i of the lifting drum 421 to act so that the lifting drum 421 jacks up and stably supports the first roll of paper, then controls the rotary driving motor of the rocker arm type film-drawing machine 41 to act so that the rocker arm 412 drives the film frame 413 to rotate around the axial lead of the rotary shaft, and as the packaging film end is clamped on the scissor type automatic clamping portion 432 and the supporting bottom frame 431 of the film-drawing automatic tail-cutting device 43 is located near the rear end or the front end of the first roll of paper, the packaging film is drawn and released by the film frame 413 during the rotation of the rocker arm 412, and the packaging film firstly wraps the rear end face or the front end face of the first roll of paper near the film-drawing automatic tail-cutting device 43 and then wraps the cylinder, Sequentially winding according to the sequence of end face-cylinder body-end face-cylinder body, when the rocker 412 pulls the packaging film through the film frame 413 to enable the packaging film to at least finish the wrapping of one roll paper end face wound for the first circle, the film pulling packaging controller firstly controls the swing driving part 4324 to act to enable the swing clamping plate 4323 to reset to the initial state, then controls the supporting seat 4321 of the shear type automatic clamping part 432 to fall and reset to the initial state, then controls the supporting bottom frame 431 of the film pulling automatic tail cutting device 43 to reversely slide to the rear section of a sliding stroke or the front section of the sliding stroke, and the end of the packaging film is separated from the shear type automatic clamping part 432 and is wrapped in the packaging film in the continuous rotation process of the rocker 412; when the rocker arm 412 pulls the packaging film through the film frame 413 so that the packaging film is wound for at least the first circle, the film-pulling packaging controller controls the roller rotation driving motor of the lifting roller 421 to start, the lifting roller 421 drives the first roll paper to rotate, the rotation speed of the lifting roller 421 can be controlled by matching with the rotation speed of the rocker arm 412, the step distance that the width size of the first roll paper is smaller than that of the packaging film after the packaging film is wound around the roll paper for one circle is realized, and the film-pulling packaging of the outer surface of the whole first roll paper comprising the end surfaces of the two first roll papers can be completed after the first roll paper rotates for one circle;

after the first roll paper is subjected to stretch film packaging on the whole outer surface, the stretch film packaging controller firstly controls a rotary driving motor of the rocker arm type stretch film machine 41 and a roller rotary driving motor of the lifting roller 421 to stop operating simultaneously, then controls a supporting seat 4321 of the scissor type automatic clamping part 432 to rise, the rocker arm 412 gradually reduces the speed and stops rotating under the action of inertia, meanwhile, the packaging film is attached to a fixed clamping plate 4322 of the scissor type automatic clamping part 432 under the traction action of a film frame 413, then the stretch film packaging controller controls a swinging driving part 4324 to operate so that the swinging clamping plate 4323 and the fixed clamping plate 4322 are in a closed clamping state, and the packaging film is positioned and clamped on the scissor type automatic clamping part 432; then the film drawing packaging controller controls the lifting frame 4331 of the film drawing automatic tail cutting part 433 to lift up, controls the pushing vertical frame 4332 to extend out in the direction close to the first roll paper, controls the packaging film close to the end part of the first roll paper to be pressed on the outer surface of the first roll paper by the pressing wheel 4334 on the arc pressing plate 4333, controls the supporting bottom frame 431 of the film drawing automatic tail cutting device 43 to slide forward to set a step pitch, controls the pressing wheel 4334 to roll in the forward sliding process of the supporting bottom frame 431, and controls the packaging film clamped on the shearing type automatic clamping part 432 to be adhered on the film drawing cutting edge 4335 under the rolling pressure of the pressing wheel 4334 and the pulling force of the arc pressing plate 4333 and to be cut by the film cutting edge 4335 under the pulling force, so as to finish the automatic tail cutting of the packaging film;

then the film-drawing packaging controller controls the pushing vertical frame 4332 to retract reversely to a set step pitch to make the pressing wheel 4334 separate from the outer surface of the first roll paper, controls the main pressing and pasting roller 4342 to extend out and abut against the outer surface of the first roll paper, the end part of the adhesive tape lapped on the main pressing and pasting roller 4342 is pressed and pasted on the cut tail packaging film by the main pressing and pasting roller 4342, then the film-drawing packaging controller firstly controls and starts a roller rotation driving motor of the lifting roller 421, then controls the auxiliary pressure-connecting pasting roller 4345 to extend out and abut against the outer surface of the first roll paper, and then controls the main pressure-connecting pasting roller 4342 to retract into a set step pitch reversely to make the main pressure-connecting pasting roller 4342 separate from the outer surface of the first roll paper, during the rotation process of the first roll paper, the adhesive tape is rolled and stuck on the outer surface of the first roll paper through the auxiliary pressure sticking roller 4345; after the first roll paper rotates for at least one circle, the film-drawing packaging controller firstly controls a roller rotation driving motor for closing the lifting roller 421 and then controls the adhesive tape cutting edge 4346 to extend to a set distance, the adhesive tape is cut by the extending adhesive tape cutting edge 4346, and the film-drawing packaging controller controls the main pressure welding pasting roller 4342, the auxiliary pressure welding pasting roller 4345 and the adhesive tape cutting edge 4346 to reset to finish the automatic pasting of the adhesive tape; finally, the film drawing packaging controller sequentially controls the pushing vertical frame 4332 and the lifting frame 4331 of the film drawing automatic tail cutting part 433 to reset to an initial state, controls the supporting bottom frame 431 of the film drawing automatic tail cutting device 43 to reset to the initial state for standby, and finally controls the lifting roller 421 to fall and reset to the initial state, so that the whole film drawing packaging process of the first roll of paper is completed;

outputting and secondary automatic printing and labeling: the roll paper conveying controller controls the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roll paper output section of the roll paper conveying unit 1 to synchronously act to enable the front supporting roll and/or the rear supporting roll to drive the conveying belt to convey forwards, and after a first roll paper enters the roll paper output section, a subsequent second roll paper enters the roll paper film-drawing packaging section and a subsequent third roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roll paper output section to synchronously stop conveying for standby; when the second roll paper is subjected to film drawing packaging and the third roll paper is subjected to one-time automatic printing and labeling, the label automatic printing and labeling controller prints and outputs the relevant specification data such as gram weight, grade and core diameter and the weight data of the first roll paper through the automatic printing mark discharging machine 31 of the label printing and labeling part of the roll paper output section, then the label automatic printing and labeling controller firstly controls the air passage control valve of the label negative pressure gripping device of the label printing and labeling part of the roll paper output section to be opened and then controls the coordinate driving mechanism of the label automatic labeling mechanical arm 32 of the label printing and labeling part of the roll paper output section to act so that the label automatic labeling mechanical arm 33 of the label printing and labeling part of the roll paper output section moves to perform negative pressure adsorption gripping on the back adhesive label, and after the back adhesive label is gripped, the label automatic printing and labeling controller controls the coordinate driving mechanism of the label automatic labeling mechanical arm 32 of the label printing and labeling part of the roll paper output section label printing and labeling part to perform negative pressure gripping The motive mechanism acts to enable the label automatic pasting mechanical arm 33 to move to a set labeling position of a first roll of paper by adsorbing the gum label coordinates to carry out labeling, after labeling is completed, the label automatic printing and pasting controller firstly controls an air channel control valve of a label negative pressure gripping device of a label printing and pasting part of a roll paper output section label to be closed, then controls a coordinate driving mechanism of a label automatic pasting mechanical arm 32 of a label printing and pasting part of a roll paper output section label to act to reset, and secondary automatic printing and labeling of the first roll of paper is completed; after the first roll paper is subjected to secondary automatic printing and labeling, the central controller can independently control the roller driving motor of the roll paper output section to act so as to output the first roll paper;

Since the web just produced generally has a relatively high temperature, in order to facilitate the perforation of the core end position of the web having been subjected to the stretch film wrapping for heat dissipation, as a further improvement of the present invention, the automatic label pasting robot arm 32 of the web output stage label printing and pasting portion of the automatic label printing and pasting unit 3 includes an X coordinate driving mechanism moving along the horizontal left-right direction coordinate, a Y coordinate driving mechanism moving along the horizontal front-back direction coordinate, and a Z coordinate driving mechanism moving along the vertical up-down direction coordinate, the automatic label pasting robot arm 33 of the web output stage label printing and pasting portion is mounted on the end section of the automatic label pasting robot arm 32 by a C coordinate rotation driving assembly rotating along the Z coordinate axis as the rotation center, as shown in fig. 4, the automatic label pasting robot arm 33 of the web output stage label printing and pasting portion is further provided with a perforation device 34 through a perforation support frame, the punching device 34 comprises a pressing plate 341 and a punching shaft 342 which are installed on a punching support frame, the pressing plate 341 comprises a vertically arranged pressing surface, a punching shaft access hole penetrating through the pressing surface is formed in the vertically arranged pressing surface, the horizontally and telescopically arranged punching shaft 342 is installed on the punching support frame through a punching telescopic control component, the punching shaft 342 and the punching shaft access hole of the pressing plate 341 are coaxially arranged in a sliding fit manner, the punching telescopic control component can adopt a telescopic control structure such as a hydraulic cylinder, an air cylinder or an electric cylinder structure, a cutting edge protruding out of the end surface is arranged on the edge position of the end surface of the extending end of the punching shaft 342, the cutting edges are uniformly distributed along the circumferential direction of the punching shaft 342 and are in an annular structure, and the cutting edge can be in an annular integral edge structure or in a split edge structure with a plurality of sharp edges surrounding in an annular shape; the automatic label printing and pasting electric control device further comprises an automatic perforation control loop, and the automatic label printing and pasting controller is respectively and electrically connected with a C coordinate rotation driving assembly of the automatic label pasting mechanical arm 33 of the label printing and pasting part of the roll paper output section and a perforation telescopic control part of the perforation shaft 342. After the roll paper is subjected to secondary automatic printing and labeling, the automatic label printing and pasting controller starts an automatic perforation control loop, controls the coordinate driving mechanism of the automatic label pasting mechanical arm 32 and the coordinate rotation driving assembly of the automatic label pasting mechanical arm 33 to act so that the perforation shaft 342 of the perforation device 34 moves to be opposite to and close to the end position of the paper core of the roll paper in a coordinate manner, when the pressing surface of the pressing plate 341 abuts against the end of the paper core of the roll paper, the packaging film outside the end of the paper core is positioned and pressed on the end of the paper core, then the automatic label printing and pasting controller controls the perforation expansion control component to move so that the perforation shaft 342 extends out from the perforation shaft inlet and outlet hole of the pressing plate 341, and in the process of extending the perforation shaft 342 out, the packaging film outside the end part of the paper core is cut by the annular structure cutting edge of the extending end of the perforating shaft 342, and automatic perforation is completed after the perforating telescopic control part is reset. The positions of the front end and the rear end of the paper core can be perforated to achieve a better heat dissipation effect.

As a further improvement of the present invention, as shown in fig. 5, in order to facilitate taking out the cut waste packaging film from the paper core after automatic perforation, a through groove is formed in the perforation shaft 342 and penetrates through the perforation shaft 342 along the radial direction, the through groove is in a long circular groove structure along the axial direction of the perforation shaft 342, a piercing rod 343 is fixedly disposed at the axial position of the perforation shaft 342 and penetrates through the through groove and the end surface of the protruding end of the perforation shaft 342, the end of the pointed cone structure of the piercing rod 343 extends out of the end surface of the protruding end of the perforation shaft 342, the protruding dimension of the end of the pointed cone structure protruding out of the end surface is larger than the protruding dimension of the cutting edge protruding out of the end surface, a clamping groove or an annular groove is further disposed on the end rod body of the piercing rod 343 along the radial direction, a top sleeve 344 is slidably fitted and mounted on the outer portion of the piercing rod 343, the top sleeve 344 is mounted on the perforation support frame through a top sleeve telescopic control component, and the top sleeve 344 is slidably fitted and penetrates through the end surface of the protruding end of the perforation shaft 342, the top sleeve expansion control part is electrically connected with the automatic label printing and sticking controller; as shown in fig. 3, a packaging film waste collection bin 345 is also positioned on the floor adjacent the label automated bonding robot 32. In the automatic punching process, when the pressing surface of the pressing plate 341 abuts against the end part of the paper core of the roll paper, the punching telescopic control component acts to enable the punching shaft 342 to extend out from the punching shaft inlet and outlet hole of the pressing plate 341, the end part of the pointed cone structure of the puncturing rod 343 firstly punctures the packaging film outside the end part of the paper core, the packaging film is clamped on the clamping groove or the annular groove on the rod body at the end part of the puncturing rod 343 through the puncturing hole under the elastic action of the packaging film, after the cutting edge of the annular structure is cut, the cut packaging film waste is remained on the rod body at the end part of the puncturing rod 343, then the automatic label printing and sticking controller firstly controls the coordinate driving mechanism of the automatic label sticking mechanical arm 32 and the coordinate rotation driving assembly of the automatic label sticking mechanical arm 33 to act to enable the punching shaft 342 of the punching device 34 to move in a coordinate manner and to be opposite to and close to the set position of the packaging film waste collecting barrel 345, and then controls the extending telescopic control component of the top sleeve to extend out to enable the top sleeve 344, the packaging film waste remaining on the rod body at the end part of the piercing rod 343 is ejected out of the piercing rod 343 by the ejector sleeve 344 and falls into the packaging film waste collecting barrel 345, so that the packaging film waste is taken out of the paper core and collected.

In order to obtain and print the exact length data of the web on the label, as a further improvement of the present invention, as shown in fig. 2, the label printing and pasting portion of the web weighing section of the automatic label printing and pasting unit 3 further includes a web detection device 35, the web detection device 35 includes two web end face distance detection mechanisms disposed opposite to each other at a front and rear interval corresponding to the web weighing section of the web transport unit 1, and the web end face distance detection mechanism includes a web end face distance sensor; the weighing electric control device or the label automatic printing and pasting electric control device also comprises a roll paper end face distance detection loop, and the automatic weighing controller or the label automatic printing and pasting controller is electrically connected with the roll paper end face distance sensor. In the automatic weighing process, the automatic weighing controller or the label automatic printing and pasting controller firstly sums the roll paper end face distance data fed back by the two roll paper end face distance sensors, and then calculates the difference between the sum data and the distance data between the two roll paper end face distance sensors, the difference is the exact length data of the roll paper, the automatic weighing controller sends the exact length data of the roll paper and the weight data of the roll paper to the central controller together, and the central controller can print the exact length data of the roll paper on the label through the label automatic printing and pasting controller.

In order to obtain and print the exact diameter data of the web on the label, as a further improvement of the present invention, the label automatic pasting manipulator 33 of the label printing and pasting part of the web weighing segment of the label automatic printing and pasting unit 3 is further provided with a web cylinder surface vertical distance sensor, the label automatic printing and pasting electronic control device further comprises a web diameter detection circuit, and the label automatic printing and pasting controller is electrically connected with the web cylinder surface vertical distance sensor. In the automatic weighing process, the automatic label printing and pasting controller can control the action of the automatic label pasting mechanical arm 32 to enable the automatic label pasting mechanical arm 33 to move in a coordinate mode and be positioned at a set detection position right above the roll paper (the detection position and height data before the conveying surface of a roll paper weighing section of the roll paper conveying unit 1 can be preset in the automatic label printing and pasting controller), then the automatic label printing and pasting controller calculates and stores difference between the roll paper cylinder surface height data fed back by the roll paper cylinder surface vertical distance sensor and the height data of the set detection position, the difference is exact diameter data of the roll paper, and the automatic label printing and pasting controller can print the exact diameter data of the roll paper on the label.

In order to make the adhesive tape always located on the wheel surface of the main pressing and pasting roller 4342 and prevent the adhesive tape from falling off, as shown in fig. 11, the main pressing and pasting roller 4342 is a hollow structure, and the wheel surface of the main pressing and pasting roller 4342 is uniformly provided with a plurality of negative pressure through holes penetrating through the wheel surface, the shaft end of the main pressing and pasting roller 4342 is provided with a negative pressure input port, and the negative pressure input port is connected with a negative pressure source through a gas path pipeline and a negative pressure control valve; the film-drawing packaging electric control device further comprises an adhesive tape positioning control loop, and the film-drawing packaging controller is electrically connected with a negative pressure control valve of the main pressure-welding pasting roller 4342.

In order to realize accurate positioning of the negative pressure adsorption label and automatic label pasting by the automatic label pasting mechanical arm 33, as a further improvement scheme of the invention, a distance measuring sensor is arranged on the automatic label pasting mechanical arm 33 and is electrically connected with an automatic label printing and pasting controller. In the process of negative pressure adsorption and automatic label pasting of the label automatic pasting manipulator 33, the label automatic printing and pasting controller controls the position of the label automatic pasting manipulator 33 through the feedback of the distance measuring sensor.

In order to realize accurate positioning of the negative pressure adsorption label and automatic label pasting of the automatic label pasting mechanical arm 33, as a further improvement scheme of the invention, the automatic label pasting mechanical arm 33 is provided with a mode identification sensor, the automatic label printing and pasting electric control device further comprises a mode identification judgment loop, and the automatic label printing and pasting controller is electrically connected with the mode identification sensor. In the process of carrying out negative pressure adsorption and automatic label pasting by the automatic label pasting manipulator 33, the automatic label printing and pasting controller compares the image fed back by the pattern recognition sensor with the image built in the program through the pattern recognition judgment loop and calculates a deviation value, and then the automatic label printing and pasting controller controls the coordinate driving mechanism of the automatic label pasting manipulator 32 to move to carry out coordinate deviation correction according to the deviation value, so that more accurate position positioning of the automatic label pasting manipulator 33 can be realized.

The web stretch film packaging method utilizes the structural characteristics of a cylindrical product of web, adopts a mode of winding a packaging film on the web horizontally arranged in the axial direction along the horizontal diameter direction in a circumferential direction, and when the packaging film is wound around a web cylinder, the web is driven to rotate around the central axis thereof, so that the web can rotate step by less than the width dimension of one packaging film after the packaging film is wound around the web cylinder for one circle, and then the web can be subjected to step by step rotation for one circle to finish the stretch film packaging of the outer surface of the whole web including two web end surfaces, meanwhile, the automatic adhesive tape pasting after the automatic tail cutting and the tail cutting of the web can be realized through the automatic tail cutting device 43 of the web, and the automatic shear type clamping part 432 of the automatic tail cutting device 43 of the web and clamping the end of the packaging film can be controlled to be close to the winding initial end surface of the web corresponding to the rotation direction of the rocker arm 412 before the web is subjected to the stretch film packaging, after the film-drawing packaging of the outer surface of the whole roll paper is finished, the scissor-type automatic clamping part 432 of the film-drawing automatic tail-cutting device 43 can be controlled to clamp the packaging film corresponding to the rotating direction of the rocker 412 and close to the winding end surface of the roll paper, and the film-drawing automatic tail-cutting and the automatic adhesive tape pasting after the tail-cutting are carried out through the film-drawing automatic tail-cutting part 433 of the film-drawing automatic tail-cutting device 43 and the automatic adhesive tape pasting part 434, so that the waste amount of the packaging film is greatly reduced, and the utilization rate of the packaging film is greatly improved; the online weighing of the roll paper before film drawing and packaging can be realized; the automatic printing of the web before and after the film-drawing packaging can be realized, and labels including product information such as online weighing data and the like can be pasted on the surface of the web; the paper packaging machine can effectively reduce the labor intensity of operators and reduce the occupation of packaging space on the premise of effectively packaging finished roll paper, and is particularly suitable for packaging the finished roll paper output by a paper machine.

Claims

1. A web stretch film packaging method is characterized in that a used web stretch film packaging line comprises a web conveying unit (1), an automatic weighing unit (2), a label automatic printing and pasting unit (3), a stretch film packaging unit (4) and a centralized electric control unit;

the roll paper conveying unit (1) comprises a conveying device and a roll paper conveying electric control device, the conveying device is of a multi-section conveying structure which is connected end to form a whole linear structure conveying line, the multi-section conveying structure sequentially comprises a roll paper input section, a roll paper weighing section, a roll paper film-drawing packaging section and a roll paper output section from back to front, the conveying device is of a belt conveying structure or a roller-arrangement conveying structure comprising a roller driving motor, the roll paper conveying electric control device comprises a roll paper conveying controller and a roll paper conveying control loop, and the roll paper conveying controller is respectively and electrically connected with the roll driving motors of the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roll paper output section;

the automatic weighing unit (2) is arranged corresponding to the roll paper weighing section of the roll paper conveying unit (1) and comprises an electronic scale (21) and a weighing electric control device; the electronic scale (21) is horizontally positioned and installed under a roll paper weighing section of the roll paper conveying unit (1); the weighing electric control device comprises an automatic weighing controller and a weighing control loop, and the automatic weighing controller is electrically connected with the electronic scale (21);

the automatic label printing and pasting unit (3) comprises a label printing and pasting part of a roll paper weighing section, a label printing and pasting part of a roll paper output section and an automatic label printing and pasting electric control device; the label printing and pasting part of the roll paper weighing section is correspondingly arranged on the left side or the right side of the roll paper weighing section of the roll paper conveying unit (1), and the label printing and pasting part of the roll paper output section is correspondingly arranged on the left side or the right side of the roll paper output section of the roll paper conveying unit (1);

the label printing and pasting part of the roll paper weighing section and the label printing and pasting part of the roll paper output section respectively comprise an automatic printing and marking machine (31), an automatic label pasting mechanical arm (32) and an automatic label pasting mechanical arm (33); the automatic printing and marking machine (31) is arranged on the ground; the automatic label pasting mechanical arm (32) is correspondingly arranged near the automatic printing and marking machine (31), and the automatic label pasting mechanical arm (32) at least comprises an X coordinate driving mechanism moving along the horizontal left-right direction and a Z coordinate driving mechanism moving along the vertical up-down direction; the label automatic pasting mechanical arm (33) is installed on the tail section of the label automatic pasting mechanical arm (32), the label automatic pasting mechanical arm (33) comprises a label negative pressure grabbing device, the label negative pressure grabbing device comprises a negative pressure sucker installed through a sucker support, and the negative pressure sucker is connected with a negative pressure source through an air channel pipeline and an air channel control valve;

the automatic label printing and sticking electric control device comprises an automatic label printing and sticking controller, an automatic label printing control loop and an automatic label sticking control loop, wherein the automatic label printing and sticking controller is respectively and electrically connected with an automatic printing and marking machine (31), a coordinate driving mechanism of an automatic label sticking mechanical arm (32) and an air passage control valve of a label negative-pressure grabbing device;

the film drawing and packaging unit (4) is arranged corresponding to the roll paper film drawing and packaging section of the roll paper conveying unit (1) and comprises a rocker arm type film drawing machine (41), a roll paper cylinder carrying and rotating device (42), an automatic film drawing and cutting device (43) and an electric film drawing and packaging control device;

the rocker arm type film drawing machine (41) comprises a rocker arm support frame (411), a rocker arm (412) and a film frame (413); the rocker arm (412) comprises a horizontal section and a vertical section, the horizontal section is installed on the rocker arm supporting frame (411) through a vertically arranged rotating shaft, the axial lead of the rotating shaft is arranged right opposite to the geometric center of the roll paper film pulling and packaging section of the roll paper conveying unit (1), a rotating driving motor is arranged on the rotating shaft, the vertical section is fixedly arranged at the end part of the horizontal section, a film frame (413) comprising a vertically arranged packaging film roll supporting rod is installed on the vertical section of the rocker arm (412), and the height dimension of the film frame (413) corresponds to the height dimension of the axial lead of the roll paper;

the roll paper tube supporting and rotating device (42) comprises lifting rollers (421) horizontally arranged below the ground, the lifting rollers (421) with central axes arranged along the front and back directions are symmetrically arranged in two left and right relative to a roll paper film-drawing packaging section of the roll paper conveying unit (1), each lifting roller (421) comprises a lifting guide mechanism I and a lifting driving mechanism I, and a roller rotating driving motor is further arranged on at least one lifting roller (421);

the automatic film-drawing and tail-cutting device (43) is horizontally arranged below the ground on the left side or the right side of a roll paper film-drawing packaging section of the roll paper conveying unit (1) and comprises a supporting bottom frame (431), a scissor-type automatic clamping part (432), an automatic film-drawing and tail-cutting part (433) and an automatic adhesive tape sticking part (434); the support chassis (431) is arranged below the ground through a sliding guide mechanism I and a sliding driving mechanism I which are arranged along the front-back direction; the scissor type automatic clamping part (432) comprises a supporting seat (4321), a fixed clamping plate (4322), a swinging clamping plate (4323) and a swinging driving part (4324), wherein the supporting seat (4321) is installed on a supporting chassis (431) through a lifting guide mechanism II and a lifting driving mechanism II which are arranged along the vertical direction, the vertically arranged fixed clamping plate (4322) is fixedly arranged on the supporting seat (4321), the bottom of the swinging clamping plate (4323) positioned at the left side or the right side of the fixed clamping plate (4322) is hinged and installed on the supporting seat (4321), the swinging driving part (4324) capable of driving the swinging clamping plate (4323) to change angles between a horizontal state and a vertical state is installed on the supporting seat (4321), and the swinging clamping plate (4323) and the fixed clamping plate (4322) are in a closed clamping state when the swinging clamping plate (4323) swings to be in the vertical state; the automatic film-drawing tail-cutting part (433) comprises a lifting frame (4331), a pushing vertical frame (4332) and an arc-shaped pressing plate (4333), wherein the lifting frame (4331) is arranged on a supporting bottom frame (431) through a lifting guide mechanism III and a lifting driving mechanism III which are arranged along the vertical direction, the lifting frame (4331) is positioned in front of or behind the automatic shearing type clamping part (432) corresponding to the rotation direction of the rocker arm (412), the pushing vertical frame (4332) is arranged on the lifting frame (4331) through a sliding guide mechanism II and a sliding driving mechanism II which are arranged along the left-right direction, the arc-shaped diameter size of the arc-shaped pressing plate (4333) is matched with the outer diameter size of the roll paper, the arc-shaped circle center position of the arc-shaped pressing plate (4333) is arranged corresponding to the axle center position of the roll paper, the arc-shaped pressing plate (4333) is fixedly arranged on the pushing vertical frame (4332), a plurality of pressing wheels (4334) which are uniformly arranged along the arc-shaped moving direction of the arc-shaped pressing plate (4333) in a rolling manner along the front-back direction, a film drawing cutting edge (4335) arranged along the arc-shaped trend direction of the arc-shaped pressing plate (4333) is further arranged behind or in front of the pressing wheel (4334) corresponding to the rotation direction of the rocker arm (412), and the protruding height dimension of the cutting edge of the film drawing cutting edge (4335) facing the arc-shaped circle center direction of the arc-shaped pressing plate (4333) is smaller than the protruding height dimension of the pressing wheel (4334) facing the arc-shaped circle center direction of the arc-shaped pressing plate (4333); the automatic adhesive tape sticking part (434) comprises a mounting vertical plate (4341) and a main pressure welding sticking roller (4342), an adhesive tape guide roller (4343), an adhesive tape roll mounting seat (4344), an auxiliary pressure welding sticking roller (4345) and an adhesive tape cutting edge (4346) which are mounted on the mounting vertical plate (4341), the mounting vertical plate (4341) which is positioned in front of or behind the pushing vertical frame (4332) corresponding to the rotation direction of the rocker arm (412) is fixedly mounted on the pushing vertical frame (4332), the main pressure welding sticking roller (4342) is mounted on the upper part of the mounting vertical plate (4341) through a telescopic control part I which is telescopically arranged along the left-right direction, the axial direction of the main pressure welding sticking roller (4342) is arranged along the front-back direction, the auxiliary pressure welding sticking roller (4345) with the central axis parallel to the main pressure welding sticking roller (4342) is arranged below or above the main pressure welding sticking roller (4342) or corresponding to the rotation direction of the lifting roller (421), The auxiliary pressure-welding pasting roller (4345) is arranged on the mounting vertical plate (4341) through a telescopic control part II which is arranged in a telescopic mode along the left-right direction, the adhesive tape cutting edge (4346) is arranged between the main pressure-welding pasting roller (4342) and the auxiliary pressure-welding pasting roller (4345), the adhesive tape cutting edge (4346) is arranged on the mounting vertical plate (4341) through a telescopic control part III which is arranged in a telescopic mode along the left-right direction, and an adhesive tape guide roller (4343) and an adhesive tape roll mounting seat (4344) of which the central axes are parallel to the main pressure-welding pasting roller (4342) are arranged on the mounting vertical plate (4341);

the film drawing packaging electric control device comprises a film drawing packaging controller, a film drawing machine control loop, a paper roll carrying rotary control loop and a film drawing automatic tail cutting control loop, wherein the film drawing packaging controller is electrically connected with a rotary driving motor of a rocker arm type film drawing machine (41), a lifting driving mechanism I of a lifting roller (421), a roller rotary driving motor of the lifting roller (421), a sliding driving mechanism I of a supporting underframe (431), a lifting driving mechanism II of a supporting seat (4321), a swinging driving part (4324) of a swinging clamping plate (4323), a lifting driving mechanism III of a lifting frame (4331), a sliding driving mechanism II of a pushing vertical frame (4332), a telescopic control part I of a main pressure welding pasting roller (4342), a telescopic control part II of an auxiliary pressure welding pasting roller (4345) and a telescopic control part III of an adhesive tape cutting blade (4346) respectively;

before a roll paper product is packaged by using a roll paper film-drawing packaging line, in an initial state, a film frame (413) of a rocker arm type film-drawing machine (41) is stopped at the same side with an automatic film-drawing tail-cutting device (43) through a rocker arm (412), a lifting roller (421) of a roll paper tube carrying and rotating device (42) is positioned at the lifting stroke lower position of a lifting guide mechanism I below the carrying surface of a roll paper film-drawing packaging section of a roll paper conveying unit (1), a supporting bottom frame (431) of the automatic film-drawing tail-cutting device (43) is positioned at the front section or the rear section of the sliding stroke of the sliding guide mechanism I corresponding to the rotation direction of the rocker arm (412), a supporting seat (4321) of a scissor type automatic clamping part (432) is positioned at the lifting stroke lower position of a lifting guide mechanism II, a swinging clamping plate (4323) is positioned in a horizontal state separated from a fixed clamping plate (4322), and a lifting frame (4331) of an automatic film-drawing tail-cutting part (433) is positioned at the lifting stroke lower position of the lifting guide mechanism I The pushing vertical frame (4332) is positioned at the left end or the right end of the sliding stroke of the sliding guide mechanism II, and the main pressing and pasting roller (4342), the auxiliary pressing and pasting roller (4345) and the adhesive tape cutting edge (4346) of the automatic adhesive tape part (434) are all in a completely retracted state;

the film-drawing packaging method specifically comprises the following steps:

a. preparing for packaging: the operator first controls the central controller to retrieve relevant specification data including grammage, grade, core diameter for the batch of web products, then the operator sleeves the packaging film roll on the packaging film roll supporting rod and draws out the packaging film end of the packaging film roll, after the supporting seat (4321) of the scissor type automatic clamping part (432) is controlled to rise by the film-pulling packaging controller, the end of the packaging film is abutted against the fixed clamping plate (4322) of the scissor type automatic clamping part (432), the swinging driving part (4324) is controlled by the film-pulling packaging controller to move so that the swinging clamping plate (4323) and the fixed clamping plate (4322) are in a closed clamping state, and the end of the packaging film is clamped on the scissor type automatic clamping part (432), then an operator installs the adhesive tape roll on the adhesive tape roll installation seat (4344), extracts the end part of the adhesive tape, bypasses the adhesive tape guide roller (4343) and then is lapped on the main crimping and pasting roller (4342);

b. automatic weighing and one-time automatic printing and labeling: the central controller starts an automatic roll paper conveying control loop, the roll paper conveying controller controls a roll paper input section of a roll paper conveying unit (1) and a roll paper weighing section to synchronously act and convey forwards, roll paper which finishes a roll cutting process sequentially enters the roll paper input section at intervals, and after a first piece of roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section and the roll paper weighing section to synchronously stop conveying for standby; the central controller controls and starts an automatic roll paper weighing control loop, after the automatic weighing controller sends weight data of a first roll paper fed back by an electronic platform scale (21) to the central controller, the central controller starts an automatic printing and label pasting control loop, the automatic label printing and pasting controller prints and outputs a gum label by an automatic printing and marking machine (31) of a printing and pasting part of a roll paper weighing section label and controls an air passage control valve of a label negative pressure grabbing device of the printing and pasting part of the roll paper weighing section label to be opened and controls a coordinate driving mechanism of an automatic label pasting mechanical arm (32) of the printing and pasting part of the roll paper weighing section label to move a coordinate of an automatic label pasting mechanical arm (33) of the printing and pasting part of the roll paper weighing section label to perform negative pressure adsorption and grabbing on the gum label After a gum label is grabbed, the label automatic printing and sticking controller controls the coordinate driving mechanism of the label automatic sticking mechanical arm (32) of the label printing and sticking part of the roll paper weighing section label to act so that the label automatic sticking mechanical arm (33) moves to a set labeling position of a first roll paper by adsorbing the gum label coordinate to perform labeling, and after the labeling is completed, the label automatic printing and sticking controller controls the air path control valve of the label negative pressure grabbing device of the label printing and sticking part of the roll paper weighing section label to close and controls the coordinate driving mechanism of the label automatic sticking mechanical arm (32) of the label printing and sticking part of the roll paper weighing section label to act to reset to complete one-time automatic printing and labeling of the first roll paper;

c. and (3) film pulling and packaging: the roll paper conveying controller controls a roll paper input section, a roll paper weighing section and a roll paper film-drawing packaging section of the roll paper conveying unit (1) to synchronously act and convey forwards, and after a first roll paper enters the roll paper film-drawing packaging section and a subsequent second roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section and the roll paper film-drawing packaging section to synchronously stop conveying for standby; when a second roll paper is subjected to primary automatic printing and labeling, a central controller controls to start a roll paper film-pulling packaging control loop, a film-pulling packaging controller firstly controls a lifting driving mechanism I of a lifting roller (421) to act to jack the lifting roller (421) and stably support and carry the first roll paper, then the film-pulling packaging controller controls a rotary driving motor of a rocker arm type film-pulling machine (41) to act to drive a rocker arm (412) to drive a film frame (413) to rotate around the axial lead of a rotary shaft, the rocker arm (412) pulls a packaging film roll and releases the packaging film through the film frame (413) in the rotating process, the packaging film is sequentially wound according to the sequence of end face-cylinder body-end face-cylinder body, when the rocker arm (412) pulls the packaging film through the film frame (413) to enable the packaging film to at least finish the packaging of one roll paper end face wound in the first circle, the film-pulling packaging controller firstly controls a swing driving part (4324) to act to enable a swing clamping plate (4323) to reset to the initial state, Then the supporting seat (4321) of the shear type automatic clamping part (432) is controlled to fall and reset to an initial state, then the supporting chassis (431) of the film pulling automatic tail cutting device (43) is controlled to reversely slide to the rear section of a sliding stroke or the front section of the sliding stroke, and the end of the packaging film is separated from the shear type automatic clamping part (432) and is wrapped in the packaging film in the continuous rotation process of the rocker arm (412); when the rocker arm (412) pulls the packaging film through the film frame (413) to enable the packaging film to be wound for at least the first circle, the film-pulling packaging controller controls a roller rotation driving motor of the lifting roller (421) to be started, the lifting roller (421) drives the first roll paper to rotate, the rotation speed of the lifting roller (421) is controlled by matching with the rotation speed of the rocker arm (412), the step pitch that the width size of the first roll paper is smaller than that of the packaging film in a stepping rotation mode after the packaging film is wound for one circle around the roll paper cylinder is achieved, and the film-pulling packaging of the outer surface of the whole first roll paper is completed after the first roll paper rotates for one circle;

after the first roll paper finishes the film-drawing packaging of the whole outer surface, a film-drawing packaging controller firstly controls a rotary driving motor of a rocker arm type film-drawing machine (41) and a roller rotary driving motor of a lifting roller (421) to stop acting at the same time, then controls a supporting seat (4321) of a shear type automatic clamping part (432) to rise, a rocker arm (412) drives a film frame (413) to gradually slow down and stop at an initial position, meanwhile, the packaging film is attached to a fixed clamping plate (4322) of the shear type automatic clamping part (432) under the drawing action of the film frame (413), and then the film-drawing packaging controller controls a swing driving part (4324) to act to enable a swing clamping plate (4323) and the fixed clamping plate (4322) to be in a closed clamping state to position and clamp the packaging film on the shear type automatic clamping part (432); then the film drawing packaging controller controls a lifting frame (4331) of the film drawing automatic tail cutting part (433) to lift up, controls a pushing vertical frame (4332) to extend out in a direction close to the first roll paper, controls a packaging film close to the end part of the first roll paper to be pressed on the outer surface of the first roll paper by a pressing wheel (4334) on an arc-shaped pressing plate (4333), controls a supporting bottom frame (431) of the film drawing automatic tail cutting device (43) to slide forward to set a step pitch, rolls the pressing wheel (4334) in the forward sliding process of the supporting bottom frame (431), enables the packaging film clamped on the shearing type automatic clamping part (432) to be attached to a film drawing cutting edge (4335) under the rolling pressure of the pressing wheel (4334) and the pulling force of the arc-shaped pressing plate (4333) and to be cut by the film cutting edge (4335) under the pulling force, and finishes the automatic tail cutting of the packaging film;

then the film-drawing packaging controller controls the pushing vertical frame (4332) to retract reversely to a set step pitch to enable the pressing wheel (4334) to be separated from the outer surface of the first roll paper, controls the main pressing and pasting roller (4342) to extend out and abut against the outer surface of the first roll paper, presses and pastes the end part of the adhesive tape lapped on the main pressing and pasting roller (4342) on the cut tail packaging film by the main pressing and pasting roller (4342), then the film-drawing packaging controller firstly controls a roller rotation driving motor for starting the lifting roller (421), then controls the auxiliary pressure-welding pasting roller (4345) to extend out and abut against the outer surface of the first roll paper, then controls the main pressure-welding pasting roller (4342) to retract into a set step pitch in the reverse direction to make the main pressure-welding pasting roller (4342) separate from the outer surface of the first roll paper, in the rotation process of the first roll paper, the adhesive tape is rolled and stuck on the outer surface of the first roll paper through a secondary compression sticking roller (4345); after the first roll paper rotates for at least one circle, the film-drawing packaging controller firstly controls a roller rotating driving motor for closing the lifting roller (421) and then controls the adhesive tape cutting edge (4346) to extend to a set distance, the adhesive tape is cut by the extending adhesive tape cutting edge (4346), and the film-drawing packaging controller controls the main pressure-welding pasting roller (4342), the auxiliary pressure-welding pasting roller (4345) and the adhesive tape cutting edge (4346) to reset to finish the automatic pasting of the adhesive tape; finally, the film drawing packaging controller sequentially controls a pushing vertical frame (4332) and a lifting frame (4331) of the film drawing automatic tail cutting part (433) to reset to an initial state, controls a supporting bottom frame (431) of the film drawing automatic tail cutting device (43) to reset to the initial state to be ready, and finally controls a lifting roller (421) to fall and reset to the initial state to complete the whole film drawing packaging process of the first roll of paper;

d. outputting and secondary automatic printing and labeling: the roll paper conveying controller controls roller driving motors of a roll paper input section, a roll paper weighing section, a roll paper film-drawing packaging section and a roll paper output section of the roll paper conveying unit (1) to synchronously act and convey forwards, and after a first roll paper enters the roll paper output section, a subsequent second roll paper enters the roll paper film-drawing packaging section and a subsequent third roll paper enters the roll paper weighing section, the roll paper conveying controller controls the roll paper input section, the roll paper weighing section, the roll paper film-drawing packaging section and the roll paper output section to synchronously stop conveying for standby; when the second roll paper is subjected to film drawing packaging and the third roll paper is subjected to primary automatic printing and labeling, the label automatic printing and labeling controller prints and outputs the relevant specification data of the gram weight, the grade and the core diameter and the weight data of the first roll paper through an automatic printing mark outlet machine (31) of a label printing and labeling part of the roll paper output section, then the label automatic printing and labeling controller firstly controls an air passage control valve of a label negative-pressure gripping device of the label printing and labeling part of the roll paper output section to be opened and then controls a coordinate driving mechanism of a label automatic labeling mechanical arm (32) of the label printing and labeling part of the roll paper output section to act so that a label automatic labeling mechanical arm (33) of the label printing and labeling part of the roll paper output section moves in a coordinate mode to perform negative-pressure adsorption gripping on a back-coated label, and after the back-coated label is gripped, the label automatic printing and labeling controller controls the label automatic labeling mechanical arm of the label printing and labeling part of the roll paper output section to perform negative-pressure adsorption gripping (32) The coordinate driving mechanism acts to enable the label automatic pasting mechanical arm (33) to move to a set labeling position of a first roll of paper by adsorbing the gum label coordinate to carry out secondary labeling, after the secondary labeling is finished, the label automatic printing and pasting controller firstly controls an air passage control valve of a label negative pressure gripping device of a label printing and pasting part of a roll paper output section to close, and then controls a coordinate driving mechanism of a label automatic pasting mechanical arm (32) of a label printing and pasting part of a roll paper output section to act to reset, so that the secondary automatic printing and labeling of the first roll of paper are finished; after the first roll paper is subjected to secondary automatic printing and labeling, the central controller independently controls a roller driving motor at the roll paper output section to act so as to output the first roll paper forwards;

2. The web stretch film wrapping method according to claim 1, wherein the label automatic application robot (32) of the label printing and applying portion of the web output section of the label automatic printing and applying unit (3) includes an X-coordinate driving mechanism moving in a horizontal left-right direction coordinate, a Y-coordinate driving mechanism moving in a horizontal front-back direction coordinate, and a Z-coordinate driving mechanism moving in a vertical up-down direction coordinate, the label automatic application robot (33) of the label printing and applying portion of the web output section is mounted on the end section of the label automatic application robot (32) through a C-coordinate rotary driving assembly rotating about a Z-coordinate axis as a rotation center, the label automatic application robot (33) of the label printing and applying portion of the web output section is further provided with a perforating device (34) through a perforating support frame, the perforating device (34) includes a pressing plate (341) and a perforating shaft (342) mounted on the perforating support frame, the pressing plate (341) comprises a vertically arranged pressing surface, a perforated shaft access hole penetrating through the pressing surface is formed in the vertically arranged pressing surface, a horizontally telescopic perforated shaft (342) is installed on the perforated support frame through a perforated telescopic control component and is coaxially arranged with the perforated shaft access hole of the pressing plate (341) in a sliding fit manner, a cutting edge protruding out of the end surface is arranged on the edge position of the end surface of the extending end of the perforated shaft (342), and the cutting edge is of an annular structure along the circumferential direction of the perforated shaft (342); the automatic label printing and pasting electric control device also comprises an automatic perforation control loop, and the automatic label printing and pasting controller is respectively and electrically connected with a C coordinate rotation driving assembly of an automatic label pasting mechanical arm (33) of the label printing and pasting part of the roll paper output section and a perforation telescopic control part of a perforation shaft (342);

after the roll paper is subjected to secondary automatic printing and labeling, the automatic label printing and labeling controller starts an automatic perforation control loop, the automatic label printing and labeling controller controls a coordinate driving mechanism of an automatic label labeling mechanical arm (32) and a coordinate rotation driving assembly of an automatic label labeling mechanical arm (33) to act so that a perforation shaft (342) of a perforation device (34) moves to face and be close to the end part of the roll paper in a coordinate manner, when a pressing surface of a pressing plate (341) abuts against the end part of the roll paper, a packaging film outside the end part of the paper core is positioned and pressed on the end part of the paper core, then the automatic label printing and labeling controller controls a perforation telescopic control component to act so that the perforation shaft (342) extends out of a perforation shaft inlet and outlet hole of the pressing plate (341), and in the extending process of the perforation shaft (342), the packaging film outside the end part of the paper core is cut by a cutting edge of an annular structure at the extending end of the perforation shaft (342), and the perforation expansion control part completes automatic perforation after resetting.

3. The web stretch film packaging method according to claim 2, wherein the perforation shaft (342) is provided with a through groove penetrating through the perforation shaft (342) in a radial direction, the through groove is in a long circular groove structure along an axial direction of the perforation shaft (342), a piercing rod (343) penetrating through the through groove and an end face of a protruding end of the perforation shaft (342) is fixedly arranged at an axial center position of the perforation shaft (342), a tip cone structure end of the piercing rod (343) extends out of the end face of the protruding end of the perforation shaft (342), a protruding dimension of the tip cone structure end protruding out of the end face is larger than a protruding dimension of the cutting edge protruding out of the end face, a clamping groove or an annular groove arranged in the radial direction is further arranged on an end rod body of the piercing rod (343), a top sleeve (344) is slidably fitted and mounted on the outer portion of the piercing rod (343), and the top sleeve (344) is mounted on the perforation support frame through a top sleeve telescopic control component, The top sleeve (344) is arranged by sliding fit through the end face of the extending end of the perforated shaft (342), and the top sleeve expansion control component is electrically connected with the automatic label printing and pasting controller; a packaging film waste collecting barrel (345) is also positioned on the ground near the automatic label pasting mechanical arm (32);

in the automatic punching process, after the pressing surface of the pressing plate (341) abuts against the end part of a paper core of roll paper, the punching telescopic control component acts to enable the punching shaft (342) to extend out of a punching shaft inlet and outlet hole of the pressing plate (341), the end part of the pointed cone structure of the puncturing rod (343) firstly punctures a packaging film outside the end part of the paper core, the packaging film is clamped on a clamping groove or an annular groove on a rod body at the end part of the puncturing rod (343) through the puncturing hole, after the cutting edge of the annular structure is cut, cut packaging film waste materials are remained on the rod body at the end part of the puncturing rod (343), and then the automatic label printing and pasting controller firstly controls the coordinate driving mechanism of the automatic label pasting mechanical arm (32) and the coordinate rotation driving assembly of the automatic label pasting mechanical arm (33) to enable the punching shaft (342) of the punching device (34) to move in a coordinate mode and face and against the set position of the packaging film waste material collecting barrel (345) in a set mode, And then the extending action of the top sleeve telescopic control part is controlled to push out the top sleeve (344), and the packaging film waste remained on the rod body at the end part of the piercing rod (343) is pushed out by the top sleeve (344), is separated from the piercing rod (343) and falls into the packaging film waste collecting barrel (345).

4. The web stretch film wrapping method according to claim 1, 2 or 3, wherein the web weighing section label printing and attaching portion of the label automatic printing and attaching unit (3) further comprises a web detecting device (35), the web detecting device (35) comprises a web end face distance detecting mechanism (351) provided in two pieces in a front-rear opposed spaced relation corresponding to the web weighing section of the web transport unit (1), the web end face distance detecting mechanism (351) comprises a web end face distance sensor; the automatic weighing controller or the automatic label printing and pasting controller is electrically connected with the distance sensor on the end face of the roll paper;

in the automatic weighing process, the automatic weighing controller or the label automatic printing and pasting controller firstly sums the roll paper end face distance data fed back by the two roll paper end face distance sensors, and then calculates the difference between the sum data and the distance data between the two roll paper end face distance sensors, wherein the difference is the exact length data of the roll paper, the exact length data of the roll paper and the weight data of the roll paper are sent to the central controller by the automatic weighing controller, and the exact length data of the roll paper are printed on the label by the central controller through the label automatic printing and pasting controller.

5. The web-fed film wrapping method according to claim 1, 2 or 3, wherein a web-roll-surface vertical distance sensor is further provided on the label automatic application robot (33) of the label printing application portion of the web weighing section of the label automatic printing application unit (3), the label automatic printing application electric control unit further includes a web diameter detection circuit, and the label automatic printing application controller is electrically connected to the web-roll-surface vertical distance sensor;

in the automatic weighing process, the automatic label printing and pasting controller controls the automatic label pasting mechanical arm (32) to act so that the automatic label pasting mechanical arm (33) moves in coordinates and is positioned at a set detection position right above roll paper, then the automatic label printing and pasting controller calculates and stores the difference between the roll paper cylinder surface height data fed back by the roll paper cylinder surface vertical distance sensor and the height data of the set detection position, the difference is the exact diameter data of the roll paper, and the automatic label printing and pasting controller prints the exact diameter data of the roll paper on the label.