RU2689708C1 - Rewinding machine and method for production of logs from rolled material - Google Patents

Abstract

FIELD: transportation, packaging and storage.SUBSTANCE: group of inventions relates to winding of rolled materials. Rewinding machine comprises bearing surface, first winding support and second winding support. Support surface extends around first winding roller and limits feed channel of winding sleeves. First winding support is formed between the first winding roller, the second winding roller and the third winding roller. First winding roller and the second winding roller limit the gap for passage of winding sleeves with rolled material wound around them. Winding feed direction extends between the first winding roller and the third winding roller. Second winding support is formed between the first winding roller, the second winding roller and the fourth winding roller. In the winding method, roll material is fed around the first winding roller. First winding sleeve is inserted into the first winding support. First part of the winding cycle is made in the first winding support. Shaped log is moved from first to second winding support. Second part of winding cycle is performed in second winding support. At the end of winding of the first log, the second winding sleeve is inserted into the first winding support.EFFECT: efficient control of winding cycle, log shape and winding density.23 cl, 9 dwg

Description

The technical field to which the invention relates.

The present invention relates to methods and machines for the production of logs from roll material, in particular, but not non-exclusively, logs from paper, in particular toilet paper, for example, rolls of toilet paper, kitchen towels, etc.

The level of technology

In the field of paper production, in particular for the production of rolls of toilet paper, kitchen towels, etc., large rolls (rolls wound on a tambour shaft) of toilet paper are wound, coming directly from the machine for continuous production of rolls. These large rolls are consistently unwound and rewound to produce rolls or logs of smaller diameters, corresponding to the diameters of the finished product intended for sale on the market. These logs have an axial length, a multiple of the length of the finished roll, intended for sale and sale, and further cut on the machines for cutting in order to obtain the finished product, intended for packaging and subsequent sale on the market.

For the production of logs from the roll material in modern rewinding machines, winding rollers are used, which, using various combinations and arrangements and adjustable rotation, allow you to automatically produce logs in a rapidly changing sequence by continuously feeding the rolled material. At the end of the winding of the log, this log must be moved out of the winding area, and the web material must be separated (by cutting, breaking, etc.) to ensure the start of the winding of the next log. Typically, the winding is carried out around the winding sleeves, usually, but not exclusively, made of cardboard, plastic or other similar suitable material. In some cases, the winding is carried out around the mandrels that are retrievable and reusable, i.e. mandrels that are extracted from the finished log after winding is completed and inserted into the rewinding machine to wind the next log.

In winding machines of a more modern design, the winding movement is transmitted to the logs formed by contact with two or more rollers rotating at an adjustable rotational speed. These rewinding machines are referred to as peripheral or surface rewinding machines, since the rewinding movement is transmitted peripherally through the contact between the surface of the winding rollers and the surface of the logs generated. Examples of rewinding machines for automatic continuous rewinding of this type are given in US Pat. No. 5,979,818 and in other patents of the same patent family, and in the patent literature referenced in this patent. The improvement of the machine described in this US patent is disclosed in documents WO-A-2011/104737 and WO 2007/083336. In these winding machines according to the prior art, the separation of the web material is carried out using a separating, tearing or cutting element that interacts with the winding roller with a fixed axis, around which the web material is fed and which limits the gap with the second winding roller to insert the winding sleeves into the winding support.

These machines are also defined as machines for continuous automatic rewinding, since the various steps of the winding cycle of each log automatically follow each other, passing from the production of one log to the next without interrupting the roll material feed and at approximately constant or essentially constant speed. The expression “automatic continuous rewinding machine” is used in the present description and appended claims to indicate the type of machine.

One of the critical stages in the operation of the rewinding machine for automatic continuous peripheral rewinding of the type described above is the replacement stage, i.e. the stage of separation of the roll material, unloading of the finished log and the start of winding a new log around the new winding sleeve inserted into the winding support.

For quick automatic execution of operations, various technical solutions were studied, for example, the use of winding rollers rotating at variable speed, which are accelerated synchronously and / or reduce speed to facilitate the proper movement of finished logs and new cartridges. In some cases, tearing systems are provided in which the web material is disconnected at the end of the winding due to the difference in speed. In other cases, compressed air systems, suction systems, mechanical systems, etc. are used to perform the separation of the web material.

Document WO-A-2012/042549 describes a rewinding machine for peripheral automatic rewinding with four rollers. The use of four rollers, provided that all or at least some of them have moving axes, allows you to limit the two winding supports and to provide more efficient control of the log formed. In some embodiments of the invention described in this document, the log is always formed in contact with at least three winding rollers, and in some cases it may be temporarily in contact with four winding rollers. This provides a particularly effective control over the winding cycle, the log form and the winding density that must be provided. In some embodiments of the invention, the web material is disengaged by stretching the web material in the direction of its path between two winding rollers. Stretching causes a rupture of the web material, forming the free rear end of the finished log and the free front end to start winding the next log on the new sleeve. Despite the fact that this machine provides very noticeable results in terms of winding accuracy and operational reliability, there are some aspects that can be improved. In particular, the proper functioning of the cycle mode and the reproducibility of the winding cycle in some cases may depend on the properties of the material being processed, i.e. rolled material and / or winding sleeves.

Disclosure of the invention

The present invention proposes a rewinding machine with four rollers for automatic continuous peripheral winding, in which the logs of the web material are wound in a rapidly changing sequence around the winding cores without interrupting the web material, i.e. by continuously or essentially continuously feeding the web material to the winding head, which in addition to the winding rollers also contains a mechanism for separating the winding material at the end of each winding cycle.

Continuous or essentially continuous feed in this description means that the web material has a feed rate that is essentially independent of the winding cycle, it should be understood that other factors can, and even significantly, change the feed rate of the web material. For example, when a coil being wound on a tambour shaft from which the web material is to be distributed has to be replaced, or when the web material is torn, it may be necessary to slow down or even stop the supply of the web material to the winding head. However, this variation in speed or stop is not tied to the winding cycle of individual logs.

According to an aspect, an automatic continuous peripheral rewinding machine is proposed for producing logs of web material wound around the winding sleeves, comprising a first winding support formed between the first winding roller, the second winding roller and the third winding roller. The first winding roller and the second winding roller limit the gap through which the winding sleeves with roll material being wound around them resemble. The winding machine also has a feed path of the winding sleeves, which continues between the first winding roller and the third winding roller. Preferably, a second winding support is also provided, which is formed between the first winding roller, the second winding roller and the fourth winding roller. The third winding roller is located in front of the gap, and the fourth winding roller is located after the gap relative to the direction of supply of the winding sleeves through the gap. The rewinder may contain a supporting surface for the winding sleeves, continuing partially around the first winding roller to the third winding roller. A channel for insertion is formed between the support surface and the first winding roller, i.e. filing winding sleeves. In the rewinding machine, a feed path for the web material can be formed, which continues between the first winding roller and the third winding roller and between the first winding roller and the second winding roller. The support surface is configured and positioned with respect to the first winding roller in such a way that the supplied sleeves, by rolling, come into contact with the supporting surface and the web material moving around the first winding roller.

In the context of the present description and the appended claims, in accordance with the semantic content of this term in the field of paper processing and other endless roll materials and, in particular, in accordance with the terminology adopted by the manufacturers of rewinding machines, the term “winding roller” refers to an electrically driven roller, t . to the roller, which rotates with the help of the engine for transmitting the winding movement to the formed log by means of friction between the surface of the winding roller and the log, which is in contact with the specified winding roller.

Winding rollers are arranged in such a way that they provide, for example, winding logs of roll material through the combined impact of necessarily three winding rollers in contact with the log formed. In addition, the specific layout of the third winding roller with respect to the path for inserting the sleeves and roll material, which continues between the third winding roller and the first winding roller, as well as through the gap between the first winding roller and the second winding roller, which separates the first winding support and the second winding support, can provide the ability to set the appropriate size of the winding rollers in order to use also the winding rollers of small diameter.

In advantageous embodiments of the invention, the rewinder comprises a disconnecting element configured and controlled to disconnect the web material at the end of the winding of the log in the second winding support. For example, the release member may be configured and controlled to interact with the first winding roller.

In some embodiments of the invention, the release member is configured and controlled to press the web material to the first winding roller and separate the web material by creating a tension in the web material that is greater than the breaking stress of the web material.

In some embodiments of the invention, the support surface extends from the entrance of the feed channel of the winding sleeves to the third winding roller. Thus, the winding sleeves are inserted into the channel and move by rolling through the above channel and around the circumference of the first winding roller with the web material between the first winding roller and the winding sleeve that is fed into the channel. The trajectory of the winding sleeves continues after the channel for inserting the sleeves between the first winding roller and the third winding roller and reaches the first winding support.

In advantageous embodiments of the invention, the support surface has openings through which the separating element can penetrate the feed channel of the winding sleeves to press the web material to the first winding roller. For example, the bearing surface may be formed by a cellular structure comprising a plurality of shaped plate elements spaced apart. The shaped edges of the plate elements form the bearing surface for the sleeves. The space between adjacent elements provides a passage for the separating element. The separating element may contain one or more clamping elements, which are placed between the lamellar elements of the honeycomb structure that form the supporting surface.

In some embodiments of the invention, the support surface may be divided into two sections. The first section may be fixed relative to the supporting structure. The second section, located after the first section relative to the direction of supply of the winding sleeves through the channel for inserting the sleeves, can move along with the third winding roller.

In possible embodiments of the invention, at least one of the first winding roller or the second winding roller has a movable axis for adjusting the distance between the first winding roller and the second winding roller and the size of the gap between the first winding roller and the second winding roller. In some embodiments of the invention, preferably both the first winding roller and the second winding roller have a movable axis. The first winding roller or the second winding roller may have axes that move symmetrically with respect to the plane of the center line passing through the gap formed between the first winding roller and the second winding roller.

In other embodiments of the invention, the first winding roller may have a fixed axis, while the second winding roller has a movable axis to adjust the size of the gap between the first winding roller and the second winding roller.

The diameters of the four winding rollers may differ from each other. Preferably, the first winding roller should have a diameter greater than the diameter of the second winding roller.

In some embodiments of the invention, the movement of the first, second, third and fourth winding rollers during log formation is adjusted so that: the first winding portion of the log is performed with a log in contact with the first winding roller, the second winding roller and the third winding roller; the second part of the winding of the log is performed with the log in contact with the first winding roller, the second winding roller, the third winding roller and the fourth winding roller; the third part of the winding of the log is performed with the log in contact with the first winding roller, the second winding roller and the fourth winding roller.

In another aspect, a method is proposed for winding a web material and sequentially generating logs of said web material around winding shells, comprising the following steps:

installing four winding rollers, limiting the first winding support between the first winding roller, the second winding roller and the third winding roller and the second winding support between the above-mentioned first winding roller, the second winding roller and the fourth winding roller;

the location of the support surface, continuing around the first winding roller and forming with it a feed channel of the winding sleeves;

feeding the web material around the first winding roller;

inserting the first winding sleeve into the feed channel and feeding the above-mentioned first winding sleeve along the insertion path between the first winding roller and the third winding roller, and inserting the first winding sleeve into the first winding support;

the first part of the cycle winding the first log around the first winding sleeve in the first winding support;

moving the formed log from the first winding support to the second winding support through a gap bounded between the first winding roller and the second winding roller;

performing the second part of the winding cycle of the first log in the second winding support;

at the end of winding the first log in the second winding support, inserting the second winding sleeve into the feed channel and feeding it along the feed path that continues between the first winding roller and the third winding roller, and inserting the second winding sleeve into the first winding support.

In some embodiments of the invention, the method may comprise the steps of inserting the second winding sleeve to the first winding roller, clamping the coiled material between the second winding sleeve and the first winding roller and separating the coiled material between the first log in the second winding support and the second winding sleeve.

The method may include the following steps: ensuring the presence of a separating element for separating the web material; and the impact using the specified separating element on the rolled material for separation of the rolled material with the formation of the rear edge of the first log and the front edge, which starts winding the second log around the second winding sleeve. The above two edges can be formed between the second sleeve and the first log closer to the end of the winding.

In some embodiments of the invention, the method may comprise one or more of the following steps: location of the support surface near the first winding roller, restriction of the insertion channel for the winding sleeves between the first winding roller and the support surface, the support surface extending from the insertion channel entrance for the winding sleeves to the third winding roller; inserting the second winding sleeve into the insertion channel and feeding the second winding sleeve by rolling it through the insertion channel in contact with the supporting surface and the web material moving around the first winding roller until the third winding roller is reached; the occurrence of the second winding sleeve between the first winding roller and the third winding roller; insertion of the second winding sleeve with the second log wound around it into the first winding support.

A possible embodiment of the method according to the invention includes the following steps:

a) inserting the first winding sleeve into the first winding support in contact with the web material gripped around the first winding roller and in contact with the support surface;

b) securing the front edge of the web material to the first winding sleeve;

c) winding a part of the log of roll material with retaining the first winding sleeve in the first winding support and feeding the first winding sleeve to the second winding support;

d) passing the first winding sleeve with the log wound around it through the gap between the first winding roller and the second winding roller and moving the first winding sleeve with the log formed around it to the second winding support and completing the winding of the roll of roll material in the above second winding support;

e) inserting the second winding sleeve into the first winding support in contact with the web material gripped around the first winding roller and with the support surface;

f) disengaging the web material to form the leading edge of the web material using a separating element and unloading the web log of the web material from the second winding support;

g) repeating steps (b) - (f) to form the next log around the above second winding sleeve without interrupting the feed of the web material.

Another embodiment of the method according to the invention may contain the following steps:

a) setting the third winding roller to its initial position for receiving the first winding sleeve;

b) bringing the first winding sleeve into contact with the web material guided around the first winding roller and the angular acceleration of the first winding sleeve moving it to the first winding support;

c) securing the front edge of the web material to the first winding sleeve;

d) feeding the first winding sleeve between the first winding roller and the third winding roller into the first winding support and winding a portion of the log of coiled material, holding the first winding sleeve in the first winding support, and feeding the first winding sleeve to the second winding support;

e) passing the first winding sleeve with the log wound around it through the gap between the first winding roller and the second winding roller, while the third winding roller is moved from the initial position to the gap between the first winding roller and the second winding roller, following the formed log, and moving to the first winding support and to the second winding support;

f) moving the first winding sleeve with a log formed around it to the second winding support;

g) completion of winding the log of the coiled material in the second winding support;

h) returning the third winding roller to its original position;

i) bringing the second winding sleeve into contact with the web material gripped around the first winding roller;

j) separation of the web material with the formation of the leading edge of the web material using the separating element with the third winding roller in the initial position and unloading the log of the web material from the second winding support;

k) repeating steps (c) - (j) to form the next log around the above second winding sleeve without interrupting the feed of the web material.

In another embodiment, the method may include the following steps:

the location of the supporting surface next to the first winding roller, forming with the first winding roller a feed channel of the winding sleeves;

at the end of the log winding, inserting a new winding sleeve into the feed channel in contact with the supporting surface and the web material gripped around the first winding roller and angular acceleration of the winding sleeve in the feed channel;

insertion of the disconnecting element into the feed channel after the new winding sleeve, causing the web material to break between the new winding sleeve and the log closer to the end of the winding in the second winding support.

Brief Description of the Drawings

The present invention will become more clear from the description below with reference to the attached drawings, which show unlimited practical embodiments of the invention.

FIG. 1-5 are schematic views of a sequence of operations of the first embodiment of a rewinder according to the invention;

in fig. 6 - system centers with electric drive for directing winding sleeves;

in fig. 7 is a sectional view along line VII-VII of FIG. 6;

in fig. 8 shows the position of the system of FIG. 6 and 7 regarding the winding roller group; and

in fig. 9 is another embodiment of a rewinding machine of the present invention.

The implementation of the invention

FIG. 1-5 show an embodiment of a rewinding machine for continuous peripheral rewinding according to the invention and a sequence of operations that, in particular, represents the replacement step, i.e. the stage of unloading the log after its winding is completed, and the insertion of a new winding sleeve to start the formation of the next log.

FIG. 1-5 shows the main elements of the rewinder, limited to the elements necessary to understand the ideas on which the invention is based, and the mode of operation of the machine. The drawing does not show and does not describe in detail the structural elements, auxiliary units and other components that are known and / or can be designed according to the existing level of technology. Specialists in this field may consider using other components based on their experience and knowledge in paper processing equipment.

In short, in the embodiment shown here, the machine, generally designated by the position 2, contains a first winding roller 1 with a rotation axis 1A located adjacent to a second winding roller 3 having a rotation axis 3A. Axes 1A and 3A are essentially parallel to each other. Between the two winding rollers 1 and 3, a gap 5 is formed, through which roll material N is fed (at least during part of the winding cycle of each log) to be wound around winding sleeves A1, A2 in order to form logs L1, L2. The path of the coiled material N continues around the first winding roller 1 with its partial wrapping so that the rolled material N is in contact with the cylindrical surface of the winding roller 1 to form a specific contact arc, which can vary during the winding cycle, as will be clear from the description of the winding process .

As will be clear from the description below, the winding sleeves also pass through the winding gap 5 during the intermediate stage of the winding cycle.

Winding sleeves A1, A2 are inserted into the machine before the gap, namely, into the winding support 6 formed by the first winding roller 1, the second winding roller 3 and the third winding roller 7. Position 7A denotes the axis of rotation of the third winding roller 7, essentially parallel to the axes 1A and 3A of the first winding roller 1 and the second winding roller 3, respectively.

Winding roll material N around the winding sleeves ends when the winding sleeves are in the second winding support 10, located after the gap 5 relative to the direction of supply of the winding sleeves to the winding head formed by the winding rollers. The second winding support is formed by the first winding roller 1, the second winding roller 3 and the fourth winding roller 8. Position 8A indicates the axis of rotation of the fourth winding roller 8, essentially parallel to the axes of the winding rollers 1, 3, 7. Position 12 indicates a pair of shoulders that rotate around axis 12A of rotation and support the fourth winding roller 8. Double arrow f12 denotes the direction of rotation, i.e. rotational reciprocating movement of the shoulder 12 and, accordingly, the fourth winding roller 8. Through movement around the axis 12A and turning the winding roller 8 can move to the gap 5 and from the gap 5 formed between the first winding roller 1 and the second winding roller 3.

In other embodiments of the invention, the fourth winding roller 8 may be supported by a system of sliders moving along linear guides, instead of shoulders, which rotate around a rotary axis. In this case, the forward movement along the linear guides also allows the winding roller 8 to move to and from the gap 5.

In the present description and in the appended claims, the definition of “before” and “after” with respect to the position of the winding rollers refers to the feed direction of the web material and the axis of the winding sleeves, unless otherwise specified.

The third winding roller 7 can move to the winding gap 5 and away from it. To this end, in some embodiments of the invention, the third winding roller 7 is supported by a pair of arms 9, which rotate about an axis 9A for rocking, i.e. rotation with reciprocating movement along the double arrow f9. In other embodiments of the invention, which are not shown, the third winding roller 7 can be supported by sliders moving along linear guides in order to comply, for example, with a straight path.

Before the winding gap 5 between the first winding roller 1 and the second winding roller 3, there is a feeding device or device 11 for inserting sleeves, which can be made in any suitable way and inserts individual winding sleeves A1, A2 into the first winding support, as will be described in detail with reference in fig. 1-5.

Winding sleeves can come from the “sleeve machine” not shown, i.e. from the machine for the formation of winding sleeves associated with the processing line of the coiled material N, which included the rewinding machine 2.

In some embodiments of the invention, the rewinder comprises a support surface 19 for the winding sleeves. The support surface 19 may have an approximately cylindrical shape, approximately coaxial with the first winding roller 1 with the movable axis when it is in the position shown in FIG. 1. The support surface 19 may have a step 19G in the intermediate position of its continuation. The support surface 19 may be divided into a first portion 19A and a second portion 19B, with the first portion located in front of the second portion with respect to the feed direction of the web material N.

The supporting surface 19 and the cylindrical surface of the first winding roller 1 form a channel 21 for feeding the winding sleeves A1, A2. When the first winding roller 1 is in the position shown in FIG. 1-4, the height of the feed channel 21 of the winding sleeves may be less in the first portion of the feed channel and greater in the second portion of the feed channel 21. The purpose of this variation in the height of the feed channel 21 is to facilitate the start of the rolling movement of each new winding sleeve A1, A2 inserted into the feed channel 21 by the insertion device or the sleeve feeding device 11, as will be described below. In particular, in the first portion of the feed channel 21, the height of the feed channel, i.e. the distance between the winding roller 1 and the supporting surface 19 may be less than the diameter of the winding sleeves A1, A2.

In some embodiments of the invention, the support surface 19 is formed using a mesh structure with a plurality of arcuate plates arranged adjacent to each other, between which free spaces are formed. Through these free spaces between adjacent plates forming the bearing surface 19, a separating element for cutting web material N, generally designated 23, can be inserted. In some embodiments, the cellular structure forms the first part 19A of the support surface and can be fixed, t. e. fixed relative to the support structure, which is not shown. In some embodiments of the invention, the second part 19B of the support surface may be formed by elements 19C that move with the axis 7A of the third winding roller 7, following the movement of the latter.

Elements 19C may also be plates forming a cellular structure.

In other embodiments of the invention, the surface 19B may be formed by a separate arcuate plate that extends laterally in relation to the movement of the web material, i.e. parallel to the axes of the winding rollers 1, 3, 7.

In some embodiments of the invention, the separating element 23 contains a clamp, for example, containing a number of clamping elements 24. The separating element 23 may perform a rotational reciprocating motion about an axis 23A approximately parallel to the axes of the winding rollers 1, 3. Position f23 denotes the movement of the separating element 23 . Each pressure member may contain pressure pad 24A. The pressure pad may, for example, be made of an elastic flowable material, preferably with a high friction coefficient, for example of rubber.

Synchronously with the movement of other elements of the machine, as will be described below with reference to the duty cycle, the separating element 23 is pressed against the first winding roller 1 to clamp the coiled material N between the pads 24A of the pressure elements 24 and the surface of the first winding roller 1. The latter may contain an annular surface strips having a high coefficient of friction, and annular strips having a low coefficient of friction. In this context, the terms "high" and "low" indicate the relative value of the friction coefficients of two groups of alternating annular bands. The low friction bands can advantageously be located in areas in which the pads 24A of the pressure members 24 are pressed. Thus, when the web material N is clamped at the first winding roller 1 by the pressure members 24, it tends to stop with the shoes 24A and slip along the ring strips with a low coefficient of friction of the first winding roller 1.

FIG. 1 shows the final stage of the winding cycle of the first L1 log. As shown in FIG. 1, during this stage of winding the first log L1 around the first winding sleeve A1, the log L1 is in the second winding support 10 in contact with the first winding roller 1, the second winding roller 3 and the fourth winding roller 8. Roll material N is fed along arrow fN around the first winding roller 1 through the gap 5 between the first winding roller 1 and the second winding roller 3 and is wound on the formed log L1, which is rotated by rollers 1, 3 and 8 and thus remains in the winding support 10. Position 27 denotes the guide roller For roll material N, located in front of the winding head formed by the winding rollers 1, 3, 7 and 8.

Preferably, the feed rate of the coil material N is substantially constant. The expression "essentially constant" means a speed that varies slowly with respect to the winding speed and due to factors that do not depend on the operations performed by the winding head elements described above, which are controlled to perform a winding cycle, unload the finished log, insert a new sleeve and start winding A new log with a constant feed rate of the roll material to the group of winding rollers and, in particular, to the first winding roller 1.

During winding the log L1, except for the replacement step, which forms a transitional stage in the machine, the peripheral speeds of the winding rollers 1, 3, 7, 8 are essentially the same, and all the winding rollers rotate in the same direction, as shown by arrows in the drawing. In this case, essentially the above means that the speed may vary, taking into account the limitation regarding the need to control the winding density and tension of the coiled material N between the winding roller 7 and the winding roller 8, for example, to compensate for changes in tension that could be caused by the movement of the center log formed in the direction of the trajectory between the winding rollers.

In some embodiments of the invention, this difference between the circumferential speeds of the winding rollers may be 0.1-1%, preferably 0.15-0.5%, for example 0.2-0.3%, and it is provided that these values are non-limiting examples.

In addition, peripheral speeds may vary slightly to achieve forward movement of the log formed, as described below, so that it passes from the first winding support 6 to the second winding support 10.

The cycle of winding logs is as follows.

FIG. 1 log L1 in the winding support 10, formed by rollers 1, 3, 8, is practically in a ready state with winding the required amount of roll material N around the first winding sleeve A1. The amount of coiled material wound can be determined by the length of the winding. The second winding sleeve A2 is moved by the feeder or device 11 for inserting the winding sleeves to the entrance to the feed channel 21.

Position C denotes a continuous line or groups of points of glue applied to the outer surface of the second winding sleeve A2.

FIG. 2 shows the beginning of the replacement step, i.e. unloading the finished log L1 and inserting a new coil sleeve A2 into the winding head formed by rollers 1, 3, 7, 8.

The second winding sleeve A2 is inserted by the feeder or device 11 for inserting the winding sleeves into the entrance of the feed channel 21, bounded between the first winding roller 1 and the supporting surface 19.

The position of the first winding roller 1 at this stage of the winding cycle is such that it is approximately coaxial with the approximately and basically cylindrical supporting surface 19. The distance between the portion 19A of the supporting surface 19 and the cylindrical surface of the first winding roller 1 is slightly less than the diameter of the winding sleeve A2. Thus, the winding sleeve A2 entering the feed channel 21 is pressed against the supporting surface 19 and to the web material N, which moves around the first winding roller 1.

This pressure creates a frictional force between the surface of the winding sleeve A2 and the supporting surface 19 and between the surface of the winding sleeve A2 and the web material N, which is gripped around the cylindrical surface of the first winding roller 1. As a result of the rotational movement of the first winding roller 1 and the supply of the web material N winding sleeve A2 accelerates in the angular direction and begins to roll on the support surface 19, pushed by the rolled material N and the first winding roller, against which the rolled mother al N.

The radial size of the feed channel 21 along the second portion 19B of the support surface 19 may gradually increase, thereby reducing the deformation of the diameter of the winding sleeve A2 and allowing the winding of the coiled material N to begin around it with the subsequent formation of the turns of the new log.

Stage 19G, if any, may contribute to the initial phase of the angular acceleration of the coil sleeve A2.

During rolling motion of the winding sleeve A2 in the feed channel 21, the line C of the adhesive applied to the winding sleeve A2 comes into contact with the coiled material N, causing the coiled material N to adhere to the winding sleeve.

At this stage of the winding cycle, the coiled material N is also broken or cut by means of a separating element 23. This separating element is rotated to the first winding roller 1 and clamps the rolled material N at the surface of the first winding roller 1 using pads 24A. Because the winding rollers 1, 3 and 8 continue to rotate, winding the rolled material N onto the log L1, the rolled material is tensioned by the separating element 23 between the log L1 and the clamping point of the rolled material N at the first winding roller 1.

When the tension overlaps the fracture point, for example, the perforation line of the coiled material N, the latter breaks, forming the rear edge Lf, which is wound on the log L1, and the front edge Li, which is wound on the new winding sleeve A2. The front and rear ends of Li and Lf are schematically shown in FIG. 3. In this embodiment of the winding method, when cutting the web material N is performed, the winding sleeve A2 passes through a portion of a smaller radial dimension of the channel 21 for inserting the winding sleeves A2, i.e. level 19G. In other embodiments of the invention, the cutting of the web material N can be carried out before or after passing the winding sleeve A2 in step 19G.

In some embodiments of the invention, the winding may begin without using adhesive C, for example by electrostatically charging the coiled material N and / or the winding sleeve A2, or using a suction system, optionally inside the winding sleeve A2, which may contain openings for suction. In other embodiments of the invention, the winding may begin with air jets. In other embodiments of the invention, the start of the winding can be provided or facilitated by appropriately controlling the movement of the separating element 23. For example, the separating element can be controlled to form a loop of web material that is wound around the winding sleeve.

Although FIG. 1-5, the movement of the separating element 23 is a variable reciprocating movement, in other embodiments of the invention, the movement of the separating element 23 can always be carried out in the same direction, for example, clockwise in the drawing. The speed of the separating element can be adjusted so that the coiled material is torn or cut between the clamping point of the coiled material N with the pads 24A and the log L1, for example, by rotating the separating element 23 at such a rate that the pads 24A are supplied with a lower speed than the peripheral speed of the first winding roller 1. In other embodiments of the invention, the speed of the pads 24A may be greater than the peripheral speed of the first winding roller 1. In this case, the gap or cutting ru The folded material N can be carried out between the clamping point of the roll material N pads 24A and the clamping point of the roll material N between the first winding roller 1 and the new winding sleeve A2.

In other embodiments of the invention, which are not shown, the separating element can be configured in another way and can perform, for example, cutting the web material using a knife that interacts with the anvil on the first winding roller 1. In other embodiments of the invention, the web material can be cut disconnecting element placed in the first winding roller 1 or between this roller and the path of the web material N, and the separating element is configured and is controlled to cut the web material, acting on the side of the web material N facing the winding roller 1.

FIG. 4 shows the next step in which the second winding sleeve A2 rolling along the support surface 19 leaves the bearing surface and comes in contact with the cylindrical surface of the third winding roller 7, which is located at the end of the channel 21 for inserting the winding sleeves.

The third winding roller 7 may contain a group of annular grooves 7S into which the ends of the plates are inserted, forming the end portion 19B of the supporting surface 19. Thus, the winding sleeve A2 is carefully transferred from the supporting surface 19 to the surface of the third winding roller 7.

Rolling across the surface of the third winding roller 7 and maintaining contact with the roll material N moving around the first winding roller 1, the winding sleeve A2, or rather the new log L2, which is formed around it, also comes in contact with the second winding roller 3, as shown in FIG. 4. Therefore, practically the trajectory of the winding sleeves continues between the first winding roller 1 and the third winding roller 7 and through the gap between the first winding roller 1 and the second winding roller 2.

To ensure the supply of the winding sleeve A2 through the feed channel 21, the separating element 23 rotates around the axis 23A until it leaves the feed channel 21. Adhesive C (or another means or element to start winding) causes the coiled material N to adhere to the coil sleeve A2, so that the coiled material starts to be wound on the coiling sleeve A2, starting the formation of the second log L2, while the sleeve is fed by rolling 21.

During the operations described above, the first log L1 starts moving to exit the second winding support 10, for example, by varying the peripheral speeds of the rollers 1, 3 and 8. In some embodiments of the invention, the fourth winding roller 8 may be accelerated and / or the second winding roller 3 can reduce speed to force the log L1 to move from the second winding support 10 to the discharge chute 31. The fourth winding roller 8 moves upward to ensure the passage of the log L1 to the discharge chute 31.

FIG. 4, the second winding sleeve A2 is in the first winding support 6 and is in contact with the first winding roller 1, the second winding roller 3 and the third winding roller 7, and the second log L2 is formed around this sleeve. The finished log L1 is discharged to tray 31. The second winding sleeve A2 passes through a gap or space bounded between the first winding roller 1 and the third winding roller 7 before it comes into contact with the second winding roller 3. Next, as described below, the winding sleeve A2 with a log L2 formed around it, also passes through the gap 5 between the first winding roller 1 and the second winding roller 3.

The formation of the second log L2 continues by feeding the coiled material N around the new coil sleeve A2 and, accordingly, increasing the diameter of the new log L2. The third winding roller 7 can move due to the movement of the shoulders 9 around the center of rotation or axis 9A as a result of increasing the diameter of the second log L2. The portion 19B of the supporting surface 19 may follow the movement of the third winding roller 7, so as not to hinder the movement of the latter to the gap 5 between the first winding roller 1 and the second winding roller 3.

After performing a portion of the winding cycle in the support 6, the log L2 moves to the second winding support 10, where the winding of the log ends. To this end, in some embodiments of the invention, one or, preferably, both winding rollers 1 and 3 can be supported by the respective arms 1B, 3B for turning around the rocking axes 1C, 3C.

As can be seen in FIG. 5, showing the intermediate step of passing from the winding support 6 to the winding support 10, the distance between the centers of the winding rollers 1 and 3 gradually increases, for example, by turning the arms 1B, 3B. In other embodiments of the invention, the winding rollers 1, 3 can be mounted on sliders that perform translational movement instead of rotational reciprocating movement.

Regardless of which mechanism is used to modify the distance between the centers of the winding rollers 1 and 3, moving them apart (Fig. 5) allows the log L2 to pass through the gap 5 and enter the winding support 10.

In some embodiments, during this step, the third winding roller 7 may gradually move to the second winding support 10, accompanying the log L2. Thus, the winding continues in contact with at least three winding rollers 1, 3, 7.

The fourth winding roller 8, which was raised so that the size of the log L1 could increase with the subsequent unloading of this log to the tray 31, returns to the gap 5 until it comes in contact with the log L2, which is fed through the gap 5. In the time of the winding cycle part of the log L2 may be in contact with all four winding rollers 1, 3, 7 and 8.

The third winding roller 7 can move to the gap 5, following the log L2 until it moves beyond the gap between rollers 1 and 3. From this moment the log L2 can contact only rollers 1, 3 and 8, and its final winding will be performed in the second winding support 10.

Promotion of the axis of the log L2 can be properly provided by controlling the movement of the winding rollers, which by modifying the relative position of their axes move the log L2 to the region and through the minimum distance between the rollers 1 and 3. For example, the movement can be provided by pushing the log with the third winding roller 7. In some embodiments of the invention, movement of the log may be facilitated, maintained, or affected by a time variation. Bani peripheral speeds of the winding rollers, for example by reducing the peripheral speed of the second winding roller 3 in a short time.

Although the embodiment of the invention shown in FIG. 5, contains a stage in which the log L2 contacts the four winding rollers 1, 3, 7 and 8, in other embodiments of the invention, the third winding roller 7 could lose contact with the log L2 before this log passes through the gap 5 beyond the point the minimum distance between the winding rollers 1 and 3 will come into contact with the fourth winding roller 8. However, in the shown embodiment of the invention, more efficient control of the log at various stages of its formation is provided when the log is always in contact Kte with at least three winding rollers.

The time period during which the second winding sleeve A2 remains in the position shown in FIG. 5, i.e. in the winding support 6, can be adjusted by simply acting on the peripheral speed of the winding rollers 1, 3 and 7 and / or on the position of the rollers. The second winding sleeve A2 will remain substantially in this position without further movement during the entire period of time while the peripheral speeds of the winding rollers 1, 3 and 7 remain equal to each other. As indicated above, further movement is provided, for example, by reducing the speed of the second winding roller 3. It is also possible to set the amount of roll material N to be wound around the winding sleeve A2 while holding this sleeve and the second log L2 formed around it in the winding rollers 1, 3 and 7 for a given period of time.

As soon as the log L2 is in the second winding support 10, the winding of the second log L2 will continue until the state shown in FIG. 1. The third winding roller 7, which can move to the gap and accompany the movement of the log L2 through the gap to the second winding support 10, can be returned to its original position, shown in FIG. 1, in which it interacts with the separating element 23.

In some embodiments of the invention, the structure of the elements of the rewinder is such that the trajectory along which the center of the winding sleeves A1, A2 follows is from the moment they are in contact with the three winding rollers 1, 3 and 7 to the moment when the log, which should be placed between the rollers 1, 3 and 8, begins to lose contact with the winding roller 7, is essentially rectilinear. This provides uniform winding and facilitates the use of centers that can be inserted into opposite ends of the winding sleeves to improve control of the rotation and movement of the sleeve and log during the winding cycle, combining the peripheral winding procedure with axial or central winding, as described, for example, in the patent US 7,775,476 and in the publication US-A-2007/0176039.

Using the described construction, consisting of four winding rollers, and the trajectory of movement of the winding sleeves between the first winding roller 1 and the third winding roller 7, it is possible to use the first and second winding rollers 1, 3 of relatively large diameter without intermediate support, even when winding sleeves have a small diameter. The control of the winding sleeves of small diameter is also provided with winding rollers 1, 3 of relatively large diameter, since the third winding roller 7 may have a small diameter. The low bending stiffness of the third winding roller 7 due to the small diameter of this roller can be compensated for using one or several intermediate supports. In some embodiments of the invention, the third winding roller 7 may be associated with a support beam stiffness that extends parallel to the axis 7A of the third winding roller 7 in the region in which this beam does not interfere with the path of the coiled material N and the logs L1, L2 being formed. The beam can be located, for example, at elements 19C or in diametrically opposite position relative to these elements, i.e. in the area in which the third winding roller 7 does not interact with the roll material N and / or with the formed log L1, L2.

In the embodiment of the invention shown in the attached figures, the first winding roller 1 and the second winding roller 3 have essentially the same diameter and are equipped with movable axes to increase and decrease the size of the gap 5 through which the logs formed around the respective winding sleeves pass. In other embodiments of the invention, the winding roller 1 may have a different diameter, for example, larger than the diameter of the winding roller 3. By increasing the diameter of the winding roller, the support system of the above-mentioned roller can be simplified, since a larger diameter gives better bending rigidity.

In addition, in some embodiments of the invention, only one of the two winding rollers 1 and 3 may have a movable axis, while the other has a fixed axis. Thus, the number of actuators that are required to move the various elements of the winding machine is reduced, and the conditions for controlling the movement of the winding rollers are simplified. If the two winding rollers 1 and 3 have different diameters, it is preferable that the winding roller of a larger diameter, for example the winding roller 1, has a fixed axis, while the winding roller of a smaller diameter will have a movable axis. In this configuration, the sequence of winding the web material around the winding sleeve does not change. Winding begins in the winding support 6 and ends after the winding log passes through the gap 5 into the second winding support 10.

In other embodiments of the invention, both winding rollers 1 and 3 may be movable, but may perform asymmetric movements.

In some embodiments of the invention, the rewind machine described above may be equipped with an electrically driven center system that engages, directs and adjusts the winding sleeves during at least part of their movement between the winding support 6 limited by rollers 1, 3 and 7, before the gap 5 and the winding support 10 formed by rollers 1, 3 and 8, after the gap 5.

The center system may comprise, on each side or each side element of the machine, a center 101 for engaging with a corresponding end of the winding sleeve A1, A2, which is inserted into the winding area. FIG. 6 and 7 show one of these centers and the corresponding control mechanism.

The center 101 may include a rod 103, which ends with a head 105. The head 105 may include a mechanism for engaging with a tubular winding sleeve. In some embodiments of the invention, the head 105 may engage with the winding sleeve by inserting into the sleeve. The head 105 may have expansion elements for engagement with the winding sleeve with the creation of torsional force. In some embodiments of the invention, the expandable elements comprise expandable annular elements 107, for example, pneumatically depressed using a compressed air supply system. Compressed air can flow through the channels 109.

Center 101 can make translational motion along the arrow f101 parallel to the longitudinal axis X-X of the center.

To control the rectilinear reciprocating movement can be used an actuator, for example an actuator 111 with a piston cylinder. This movement allows the heads 105 of the opposite centers 101 on both sides of the machine to move towards each other until the heads 105 engage with the ends of the corresponding winding sleeve A1, A2, which is located in the winding area. The heads 105 may penetrate into the ends of the winding sleeve partially or fully.

As can be seen in particular in FIG. 6, each center 101 may be equipped with a motor 115, for example, an electronically controlled electric motor that rotates the corresponding center 101 around the X-X axis. This movement can be transmitted from the engine 115 to the center 101 using a belt 117, for example a toothed belt. The toothed belt 117 may be driven around the pulley 119 associated with the creation of torsional forces with the bar 103 of the corresponding center 101. In particular, the pulley 119 may be mounted on the sleeve 121, inside which the bar 103 of the center 101 can slide in the direction of the double arrow f101, and the sleeve 121 is connected with the creation of torsional forces with the rod 103, for example, by means of a grooved profile, etc. The sleeve 121 can be supported by bearings 123 mounted inside the insert 125, which can be mounted on the slider 127.

The slider 127 can be mounted on fixed guides 129, i.e. made as a whole with the supporting structure of the rewinding machine. Thus, the slider 127 can move along the double arrow f127 in the direction defined by the guides 129. In some embodiments of the invention, a straight-forward reciprocating movement along the arrow f127 can be provided by an engine 131, for example, an electric motor with electronic control. The motor 131 may cause the crank 133 to swing, which transmits motion through the connecting rod 135 to the slider 127, the connecting rod 135 being pivotally connected by the hinge 135A to the slider 127 and the hinge 135B with the crank 133.

The movement along the double arrow f127 can be essentially straight and parallel to the movement of the center of the winding sleeve A1, A2 when it passes from one to the other of the two winding supports, limited by sets of three rollers 1, 3, 7 and 1, 3, 8, in the time of the winding process described above. The centers 101 can engage with the winding sleeve A1, A2 when it is in the winding support 6 before the gap 5, and can get out of the engagement with this sleeve when the log L1 is practically manufactured, thereby allowing unloading of this log according to the above description with particular reference to the step shown in FIG. 3 and 4.

During the movement along the double arrow f127 and, in particular, during the upward movement (in the figure) of the centers 101, they accompany the winding sleeve, while the log increases in diameter, while the engine 115 provides with the help of a belt 117 rotational movement of the centers 101, which is transmitted to the winding sleeve and, therefore, to the formed log, as a result of connection with the creation of torsional force between the heads 105 of the centers 101 and the winding sleeve A1, A2. The rotational speed created by the engine 115 can be adjusted so that it is commensurate with the peripheral speed of the wind-up log L1.

The use of centers 101 makes it possible to better control the winding and movement of the L1 log from one to another of the two winding supports 6, 10 and through the gap 5 during all stages of the winding cycle.

In embodiments of the invention shown in FIG. 1-8, the first winding roller 1 and the second winding roller 3 have essentially the same diameter, and both rollers can have a movable axis to facilitate the passage of the sleeve and the coiled material in the first winding stage from the first winding support 6 to the second winding support 10. In others In embodiments of the invention, the first winding roller 1 and the second winding roller 3 can have different diameters, and preferably the first winding roller 1 has a larger diameter than the second winding roller 3.

In possible embodiments of the invention, one of the winding rollers 1 and 3 may have a fixed axis, and the other a movable axis.

Preferably, the first winding roller 1, around which the web material N is wound and guided, may have a fixed axis and have a larger diameter than the second winding roller 3.

FIG. 9 shows a configuration of this type. The same reference numerals designate the same or equivalent parts as those described with reference to FIG. 1 - 8. In particular, the four winding rollers are indicated by the positions 1, 3, 7 and 8. Near the first winding roller 1, a channel 21 is formed for inserting the winding sleeves A1, A2. This channel is limited by the cylindrical surface of the first winding roller 1 and the supporting surface 19, which extends around the circumference of the first winding roller 1 and to the third winding roller 7. The winding sleeves are inserted into the channel 21 so that they contact the supporting surface 19 and the rolled material N, captured around the first winding roller 1. The supporting surface 19 may be a kind of intermediate stage, designated 19G, to facilitate the angular acceleration of the winding sleeve and gripping the coiled material after cutting the coiled material N with the release element 23 in the same manner as described above. This separating element 23 for separating the web material interacts with the first winding roller 1. clamping the web material between the first winding roller and one or more clamping elements 24A located on the separating element 23.

The axis 1A of rotation of the first winding roller 1 is stationary relative to the supporting structure of the machine to provide a more stable and more easily controlled supply of coiled material N into the gap 5 between the first winding roller 1 and the second winding roller 3.

In this embodiment of the invention, the second winding roller 3 has a diameter significantly smaller than the diameter of the first winding roller 1. For example, the diameter of the second winding roller 3 may be less than half the diameter of the first winding roller 1. The second winding roller 3 may be supported by side elements 4, as schematically shown in FIG. 9. Intermediate supports may be located between the side members 4, which support the second winding roller 3 in intermediate positions between its ends. Thus, there is the possibility of designing a second winding roller 3 of small diameter.

To ensure sufficient rigidity of the second winding roller 3, the side elements 4 and intermediate supports may be connected with the transverse beam 14.

The axis 3A of the second winding roller 3 can be movable and rotate around a rotary axis defined by the point 16 of rotation of the side elements 4 relative to the support structure of the rewinder 2. The rotary movement of the second winding roller 3 can be controlled by the engine 18 associated with the crank 20. The connecting rod, which also rotated using the hinge 22B relative to the corresponding side element 4, can be rotated using the hinge 22A relative to the crank 20. Rotation reciprocating The movement of the motor 18 ensures the rotation of the axis 3A of the second winding roller 3 around the axis defined by the turning point 16. In some embodiments of the invention, two symmetrical motors 18 may be provided, operating on two opposite sides 4. Tray 31 or a portion thereof may be installed between the side members 4, so that the tray 31 can follow the movement of the second winding roller 3.

The third winding roller 7 is mounted on the side members 32 connected to the crossbeam 34 and rotated at the turning point 36 relative to the fixed structure of the rewinder 2. To support the third winding roller 7, intermediate supports can be provided at intermediate points between its two ends integer with cross beam 34 and supported by side elements 32. Turning of the third winding roller 7, i.e. the translational movement of its axis of rotation 7A in order to follow the movement of the winding sleeves and the generated logs can be transmitted by the engine 42 by means of a crank-connecting rod system 44, 46 connected to the crossbeam 34 by means of a hinge 46A.

The portion 19C of the supporting surface 19 may be associated with the side members 32, and thus this portion may follow the translational movement of the third winding roller 7 during the various steps of the winding cycle.

The sequence of operations of the machine 2 shown in FIG. 9 is substantially the same as the sequence described with reference to FIG. 1-5, therefore its detailed description is not given. FIG. 9 shows a fully wound log L1 prepared for unloading from the second winding support 10, and a second winding sleeve A2 already inserted into the first winding support 6 between the rollers 1, 3, 7. The operating state shown in FIG. 9, in fact, may occur in the machine, but is not mandatory. Depending on the type of regulation, there may also be a case where the second winding sleeve A2 reaches the position shown in FIG. 9, when the log L1 has already been ejected from the second winding support 10.

The passage of the second winding sleeve A2 with the log formed around it through the gap 5, limited by the first winding roller 1 and the second winding roller 3, is provided or facilitated by moving only the axis 3A of the second winding roller 3, while the axis 1A of the first winding roller remains stationary relative to the design machine tool. Thus, the work of the rewinding machine becomes more uniform, in particular, when the trajectory of the winding material before the gap 5 is not modified.

Another advantage of the embodiment of FIG. 9 consists in simplifying the operation of the separating element 23 for cutting the coiled material N. In fact, it operates in conjunction with the winding roller 1, the axis of rotation of which does not move, and, consequently, the regulation during the cutting of the coiled material N is simplified.

The use of the first winding roller 1 of larger diameter eliminates the need for intermediate support of the first winding roller 1, simplifying the design of the machine and improving the quality of the logs.

Claims (32)

1. Rewinding machine for automatic continuous peripheral rewinding, intended for the production of logs of coiled material, wound around the winding sleeves, containing: a first winding support formed between the first winding roller, the second winding roller and the third winding roller; the first winding roller and the second winding roller limit the gap through which the winding sleeves pass with the web material being wound around them; a second winding support formed between the first winding roller, the second winding roller and the fourth winding roller; moreover, the third winding roller is located before the gap, and the fourth winding roller is located after the gap relative to the direction of supply of the winding sleeves through the gap; a support surface extending around the first winding roller and limiting the feed channel of the winding sleeves between the support surface and the first winding roller; wherein the supporting surface is configured and positioned relative to the first winding roller in such a way that the winding sleeves are fed by rolling in contact with the supporting surface and with the web material gripped around the first winding roller. 2. Rewinding machine according to claim 1, which contains a separating element for separating the coiled material, configured and controlled to separate the coiled material at the end of winding the log in the second winding support. 3. Rewinding machine according to claim 2, in which the separating element is configured and controlled to interact with the first winding roller. 4. Rewinding machine according to claim 2 or 3, in which the separating element is configured and controlled to press the coiled material to the first winding roller and separate the coiled material, creating tension in the coiled material more than the breaking stress of the coiled material. 5. Rewinding machine according to claim 4, in which the separating element is configured and controlled to separate the coiled material between the new sleeve inserted into the feed channel of the winding sleeves and the log formed in the second winding support, and preferably between the disconnect element and the log formed in second winding support. 6. Rewinding machine according to any one of paragraphs. 2-5, in which the separating element is configured and controlled for insertion into the feed channel of the winding sleeves and interaction with the first winding roller at a point after the winding sleeves inserted into the feed channel of the winding sleeves. 7. Rewinding machine according to any one of paragraphs. 1-6, in which the support surface extends from the entrance of the feed channel of the winding sleeves to the third winding roller. 8. Rewinding machine according to any one of paragraphs. 1-7, in which the winding rollers are located and controlled to perform the first part of the winding log in the first winding support between the first winding roller, the second winding roller and the third winding roller and the last part of the winding log in the second winding support between the first winding roller, second winding roller and the fourth winding roller. 9. Rewinding machine according to claim 8, in which the third winding roller and the fourth winding roller have moving axes and are controlled to move perpendicular to their axis, following the movement of the log during the step of increasing the diameter of the log, and to move it from the first winding support to the second winding support. 10. Rewinding machine according to any one of paragraphs. 1-9, in which at least one of the first winding roller and the second winding roller has a movable axis for adjusting the distance between the first winding roller and the second winding roller and the size of the gap between the first winding roller and the second winding roller. 11. Rewinding machine according to any one of paragraphs. 1-10, in which the first winding roller has a fixed axis, and the second winding roller has a movable axis, while preferably the first winding roller has a larger diameter than the second winding roller. 12. Rewinding machine according to any one of paragraphs. 1-10, in which both the first winding roller and the second winding roller have movable axes for moving from each other and towards each other, preferably in a symmetrical manner. 13. Rewinding machine according to any one of paragraphs. 1-12, in which the movement of the first winding roller, the second winding roller, the third winding roller and the fourth winding roller during winding the log is adjusted so that: the first part of the winding log is performed with a log in contact with the first winding roller, the second winding a roller and a third winding roller; the second part of the winding of the log is performed with the log in contact with the first winding roller, the second winding roller, the third winding roller and the fourth winding roller; the third part of the winding of the log is performed with the log in contact with the first winding roller, the second winding roller and the fourth winding roller. 14. Rewinding machine according to any one of paragraphs. 1-13, in which the support surface contains the first part, stationary relative to the support structure of the winding machine, and the part that moves with the axis of the third winding roller. 15. Rewinding machine according to any one of paragraphs. 1-14, which contains a pair of centers with electric drive, configured and intended to engage with the winding sleeve during at least part of the winding cycle, and the centers with electric drive follow the movement of the feed winding sleeve between the winding rollers. 16. Rewinding machine according to any one of paragraphs. 1-15, in which the first winding roller around which the web material moves, preferably has a diameter at least twice the diameter of the second winding roller. 17. Rewinding machine according to any one of paragraphs. 1-16, in which the first winding roller has an axis that is stationary relative to the supporting structure of the rewinding machine, and the second winding roller has an axis that is movable relative to the machine structure to provide or facilitate the passage of the formed log through the gap, limited between the first winding roller and a second winding roller. 18. The method of winding the roll material and the sequential formation of the logs of the specified roll material around the winding sleeves, containing the following steps: feeding the web material around the first winding roller of the first winding support formed by the first winding roller, the second winding roller and the third winding roller, with the first winding roller and the second winding roller limiting the second winding support with the fourth winding roller; inserting the first winding sleeve into the feed channel formed between the first winding roller and the support surface extending around the first winding roller; feeding the winding sleeve by rolling it in contact with the supporting surface and with the web material gripped around the first winding roller; feeding the first winding sleeve along the insertion path between the first winding roller and the third winding roller and inserting the first winding sleeve into the first winding support; the first part of the cycle winding the first log around the first winding sleeve in the first winding support; moving the first formed log from the first winding support to the second winding support through a gap bounded between the first winding roller and the second winding roller; performing the second part of the winding cycle of the first log in the second winding support; at the end of winding the first log in the second winding support inserting the second winding sleeve into the feed channel and feeding it along the insertion path between the first winding roller and the third winding roller, and inserting the second winding sleeve into the first winding support. 19. A method according to claim 18, which comprises the following steps: inserting the second winding sleeve against the first winding roller, clamping the web material between the second winding sleeve and the first winding roller and separating the web material between the first log in the second winding support and the second winding sleeve. 20. The method according to claim 18 or 19, which comprises the step of exposing the web material to the web material with the help of a separating element to separate the web material with the formation of the rear edge of the first log and the front edge, from which winding of the second log begins around the second coil sleeve. 21. A method according to claim 20, which comprises the step of clamping the roll material between the separating element and the first roller. 22. The method according to p. 20 or 21, which further comprises the following steps: moving the third winding roller to the gap between the first winding roller and the second winding roller at the stage of forming the log; moving the third winding roller away from the gap and placing it in the position of interaction with the release member when the log is in contact with the quarter winding roller. 23. A method according to any one of claims. 18-22, in which between the first part of the winding cycle and the second part of the winding cycle, an intermediate part of the winding cycle is performed, in which the winding log is in contact with the first winding roller, the second winding roller, the third winding roller and the fourth winding roller and moves through the gap between the first winding roller and the second winding roller.

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