CN114746345A

CN114746345A - Film packaging bag with contents, vertical bag-making, filling and packaging machine, and method for manufacturing film packaging bag with contents

Info

Publication number: CN114746345A
Application number: CN202180006901.XA
Authority: CN
Inventors: 鹤田正贵; 山口晶; 神泽洋树; 横山隆之
Original assignee: Orihiro Engineering Co Ltd
Current assignee: Orihiro Engineering Co Ltd
Priority date: 2020-05-23
Filing date: 2021-04-12
Publication date: 2022-07-12
Also published as: JP2021185086A; WO2021241035A1; JP6980057B2

Abstract

A vertical bag-making, filling and packaging machine (1) for producing a film packaging bag (100) and enclosing a fluid (X), comprising: a film conveying part (50) for conveying the tube film (Fc) downwards; a filling unit (30) for feeding a fluid to the inside of the tube membrane (Fc); a horizontal sealing part (60) which welds the tube film (Fc) in the whole width direction to form a bag body (Fa); and a cutting unit (70) that cuts the bag body (Fa) from the tube film (Fc). The lateral seal section (60) is provided with: a preheat seal portion (61) which heats and welds the tube film (Fc); and an ultrasonic sealing part (65) for further applying ultrasonic waves to the preheating seal (105) formed by the preheating sealing part (61) for welding.

Description

Film packaging bag with contents, vertical bag-making, filling and packaging machine, and method for manufacturing film packaging bag with contents

Technical Field

The present invention relates to a film packaging bag containing contents, a vertical bag-making, filling and packaging machine, and a method for manufacturing a film packaging bag containing contents.

Background

Film bags filled with food are in circulation. Such film packaging bags are known as pouches. In a vertical bag-making and filling machine for manufacturing a film packaging bag and filling food or the like, heat sealing for heating and welding a film is used.

In recent years, ultrasonic seals have been developed for the purpose of improving efficiency and simplification of seal formation, and for the purpose of improving quality stability.

Documents of the prior art

Patent document

Patent document 1: japanese laid-open patent publication No. 2018-002215

Disclosure of Invention

Problems to be solved by the invention

However, ultrasonic seals also suffer from various disadvantages. For example, if the film is not softened, a seal cannot be formed in a short time. When the film has a step in the thickness direction, a seal cannot be formed.

Further, when a seal (immersion seal) is formed in a state where a fluid such as a liquid is filled in a tubular thin film, a seal failure or edge breakage is likely to occur. In particular, if inclusions remain in the portion where the seal is formed, steam explosion (blistering) occurs during welding, and a sealing failure such as a pinhole or a crack occurs.

The invention aims to provide a film packaging bag with contents, a vertical bag-making, filling and packaging machine and a manufacturing method of the film packaging bag with contents, wherein the film packaging bag with contents can achieve the formation efficiency of a sealing part or the quality stability.

Means for solving the problems

An embodiment of the content-containing film package bag according to the present invention is a content-containing film package bag in which a fluid is sealed in a film package bag having a sealed portion formed by welding films to each other, wherein the sealed portion has a first seal, and the first seal includes: a heat pre-seal which is formed by thermally welding the films to each other; and an ultrasonic seal formed by further performing ultrasonic welding to the heat-sealing step.

In an embodiment of the film packaging bag with contents according to the present invention, the sealed portion has a second seal, the second seal includes only a heat seal obtained by heat-sealing the films to each other, and the heat seal has a lower welding strength than the second seal.

An embodiment of the film packaging bag with contents of the present invention is characterized in that the width of the ultrasonic seal is narrower than the width of the pre-heat seal.

An embodiment of the film packaging bag with contents according to the present invention is characterized in that the width of the ultrasonic seal is 50 to 90% of the width of the pre-heat seal.

In an embodiment of the film packaging bag with contents according to the present invention, the ultrasonic seal and the pre-heat seal are arranged to overlap each other on the outer side of the film packaging bag, and only the pre-heat seal is arranged on the inner side of the film packaging bag.

In an embodiment of the film packaging bag with contents according to the present invention, the first seals are disposed on opposite side edges of the outer periphery of the film packaging bag, respectively.

An embodiment of a vertical bag-making, filling and packaging machine according to the present invention is a vertical bag-making, filling and packaging machine that manufactures a film packaging bag and seals fluid therein, the vertical bag-making, filling and packaging machine including: a film conveying part for conveying the tube film downwards; a filling unit for feeding a fluid to the inside of the tube film; a horizontal sealing part for welding the tube film in the whole width direction to form a bag body; and a cutting unit for cutting the bag body from the tube film, wherein the lateral sealing unit includes: a preheating seal part for heating the pipe film to perform welding; and an ultrasonic sealing part for welding the preheating seal formed by the preheating sealing part by further applying ultrasonic waves.

In an embodiment of the vertical bag-making, filling and packaging machine according to the present invention, the vertical bag-making, filling and packaging machine includes a vertical seal portion that forms the tube film by thermally welding strip-shaped films to each other, and the heating time of the preheat seal portion is shorter than the heating time of the vertical seal portion.

An embodiment of the vertical bag-making, filling and packaging machine according to the present invention is characterized in that the ultrasonic sealing portion further cools and solidifies the pre-heat seal.

In the vertical pouch-making, filling and packaging machine according to the present invention, the sealing width of the ultrasonic sealing portion is narrower than the sealing width of the preheat sealing portion.

In the vertical pouch-making, filling and packaging machine according to the present invention, the ultrasonic seal portion is formed by being overlapped to the pre-heat seal portion formed by the pre-heat seal portion in a vertically symmetrical manner.

An embodiment of the vertical form-fill-seal packaging machine of the present invention is characterized in that the ultrasonic seal portion has a non-seal forming region extending in the seal length direction at the center in the seal width direction.

In an embodiment of the vertical bag-making, filling and packaging machine according to the present invention, the cutting section cuts off a portion of the transverse seal formed by the transverse sealing section, the portion corresponding to the non-seal forming region.

An embodiment of a method for manufacturing a content-filled film package bag according to the present invention is a method for manufacturing a content-filled film package bag in which a fluid is sealed, the method comprising: a film transfer step of transferring the tube film in a downward direction; a filling step of filling the inside of the tube film with a fluid; a transverse sealing step of welding the tube film in the whole width direction to form a bag body; and a cutting step of cutting the bag body from the tube film, the lateral sealing step including: a preheating and sealing step of heating the tube film to perform fusion bonding; and an ultrasonic sealing step of further applying ultrasonic waves to the pre-heat seal formed in the pre-heat sealing step to perform welding.

The method for manufacturing a film packaging bag with contents according to an embodiment of the present invention includes a longitudinal sealing step of forming the tube film by thermally welding band-shaped films to each other, and the heat seal formed in the preheating sealing step has a lower welding strength than the longitudinal seal formed in the longitudinal sealing step.

Effects of the invention

According to the present invention, it is possible to realize a film packaging bag with contents, a vertical bag-making, filling and packaging machine, and a method for manufacturing a film packaging bag with contents, which can achieve efficient formation of a sealed portion and stable quality.

Drawings

Fig. 1 is a front view of a film packaging bag 100 containing contents according to an embodiment of the present invention.

Fig. 2 is a side view showing a schematic configuration of the bag-making, filling and packaging machine 1 according to the embodiment of the present invention.

Fig. 3 is a front view showing the filling part 30 and the like.

Fig. 4 is a front view showing the cross seal portion 60 and the cutting portion 70.

Fig. 5 is a side view showing the cross seal portion 60 and the cutting portion 70.

Fig. 6 (a) is a longitudinal sectional view of the heater rod 62, and (b) is a front view of the anvil rod 67.

Detailed Description

The film packaging bag 100, the vertical bag-making, filling and packaging machine 1, and the method of manufacturing the film packaging bag 100 filled with the contents according to the embodiment of the present invention will be described below.

[ film packaging bag 100 ]

Fig. 1 is a front view of a film packaging bag 100 containing contents.

The film packaging bag 100 is a so-called standing bag type packaging body, and is manufactured by a vertical bag-making, filling and packaging machine 1 described later.

The film package bag 100 is formed by sealing (heat welding, ultrasonic welding) four edges of a band-shaped film F. The film packing bag 100 has sealing portions at four sides thereof. The sealing portion includes: a bottom seal 101, a bottom reinforcement seal 102, a top seal 103, and a side seal 104.

The film F is a laminated film obtained by laminating high-strength films such as nylon and polyester. The film F has a sealant layer on the inner surface, and is laminated so that the inner surfaces are welded to each other and the outer surfaces are not welded to each other.

The film packaging bag 100 is filled with a content X such as a food (food and drink). The content X is a fluid such as a liquid. Or a mixture of fluid and solid. Fluids also include liquids, gels, pastes.

The film package bag 100 can be self-standing (set upright) in a state filled with the content X.

The vertical direction when the film packaging bag 100 is set up is also referred to as the vertical direction.

The width direction of the film packaging bag 100 when it is set is also referred to as the transverse direction. The inside of the film packaging bag 100 in the transverse direction is referred to as the inside, and the outside (end side) is referred to as the outside.

The directions orthogonal to the longitudinal direction and the transverse direction, respectively, are referred to as thickness directions.

The extending direction, the width direction, and the thickness direction of the side seal 104 are respectively aligned with the seal length direction, the seal width direction, and the seal thickness direction.

Bottom seal 101, bottom reinforcement seal 102

A bottom seal (a seal portion, a second seal, a vertical seal) 101 is formed on the lower side of the film packaging bag 100 by a bottom seal portion 21 described later.

Bottom reinforcing seals (seal portions, second seal, vertical seal) 102 are formed at both lower ends of the film packaging bag 100 by the 2 nd bottom reinforcing seal portions 22 described later.

A gusset 100a formed by folding the film F into a double layer (M-shape) is provided on the lower end side of the film packaging bag 100. The gusset 100a includes: 2 outward folded parts formed by adhering the inner surfaces of the films F to each other; and 1 inward folded part formed by adhering the outer surfaces of the films F to each other. An inner folded part is arranged between the 2 outer folded parts.

The gusset 100a is provided by forming a bottom seal 101 and a bottom reinforcing seal 102 in a state where the film F is folded into an M-shape.

The back seal 101 welds each of the 2 folded-over portions of the gusset 100 a. The bottom reinforcing seal 102 is welded to the lower end of the side edge of the film packaging bag 100 from both ends of the gusset portion 100 a. The bottom reinforcement seal 102 extends from both ends of the bottom seal 101 toward the side seals 104 through the inward folded portions.

In the gusset 100a, the inner surfaces of the films F are welded to each other by the bottom seal 101 and the bottom reinforcement seal 102, but the outer surfaces of the films F are not welded to each other. Therefore, the gusset portion 100a has a bifurcated shape. The lower end of the film packaging bag 100 can be opened and closed with the inward folded portion of the gusset 100a as a starting point.

When the gusset portion 100a is opened, the thickness of the lower portion of the film packaging bag 100 becomes large. Thus, the film packaging bag 100 can stand by itself (stand on its bottom) with the gussets 100a as the bottom.

On the other hand, when the gusset 100a is closed, the thickness of the lower portion of the film packaging bag 100 becomes thin. Thus, the film packaging bag 100 is easily laid (superposed).

Top seal 103

A top seal (a seal portion, a secondary seal, a vertical seal) 103 is formed at the upper end of the film packaging bag 100 by a top seal portion 24 described later.

The top seal 103 welds the upper edge of the film package 100 and forms the peripheral edge of the drinking spout of the film package 100.

A tear notch N is provided on the upper end side of the top seal 103. The film F is torn in the transverse direction with the notch N as a starting point, and the top seal 103 is cut off at its upper end. Thus, a drinking spout appears at the upper end of the film wrapper 100.

Side seal 104

Side seals (a seal portion, a first seal, and a transverse seal) 104 are formed at both ends of the film packaging bag 100 in the transverse direction by transverse seal portions 60 described later.

The side seals 104 are disposed on opposite sides of the outer periphery of the film wrapper bag 100.

The side seals 104 weld the sides of the film package 100. Side seals 104 extend in the longitudinal direction and connect top seal 103 to bottom reinforcement seal 102.

The side seal 104 includes a pre-heat seal 105 and an ultrasonic seal 106.

The pre-heat-seal 105 is formed by heating the films F to be incompletely welded to each other. The pre-heat seal 105 functions as a temporary fixing. That is, the welding strength is lower than that of the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103. The pre-heat seal 105 is sometimes broken (leaked) when an external force is applied to the film-packaging bag 100. For example, the pre-heat seal 105 may sometimes be broken when the film packaging bag 100 is grasped.

The ultrasonic seal 106 is formed by applying ultrasonic waves to the pre-heat seal 105 to further weld the films F to each other. The ultrasonic seal 106 is formed by double-layer welding the film F in the thickness direction of the film packaging bag 100. At the ultrasonic seal 106, the films F are sufficiently welded to each other.

The side seals 104 extend linearly in the longitudinal direction. The seal width of the side seals 104 is constant (6.5mm) in the longitudinal direction.

The pre-heat seal 105 has a seal width equal to the seal width of the side seal 104. The seal width of the ultrasonic seal 106 is narrower than the seal width of the pre-heat seal 105. For example, the seal width of the ultrasonic seal 106 is 5mm and the seal width of the pre-heat seal 105 is 6.5 mm. Preferably, the sealing width of the ultrasonic seal 106 is 50 to 90% of the sealing width of the preheat seal 105.

The ultrasonic seal 106 is disposed so as to completely overlap the preheating seal 105. A pre-heat seal 105 and an ultrasonic seal 106 are arranged to overlap each other from the outer side to the center of the side seal 104. Inside the side seal 104, only the pre-heat seal 105 is disposed. The preheating seals 105 are exposed 1.5mm inward in the sealing width direction of the ultrasonic seal 106.

Since the side seals 104 include the pre-heat seal 105 and the ultrasonic seal 106, the film packaging bag 100 can not only take advantage of the ultrasonic welding, but also compensate for the disadvantage of the ultrasonic welding by the temporary heat welding.

Since the film F is softened by the formation of the pre-heat seal 105, the ultrasonic seal 106 can be formed in a short time.

Even when there is a step in the thickness direction at the portion where the ultrasonic seal 106 is formed (the side edge of the film packaging bag 100), the formation of the pre-heat seal 105 softens the film F to eliminate the step, and thus the ultrasonic seal 106 can be formed satisfactorily.

The ultrasonic seal 106 is most often formed by a process known as immersion sealing. That is, the ultrasonic seal 106 is formed in a state where the inside of the film F is filled with the fluid (the content X). In this case, a sealing failure or edge breakage is likely to occur. However, since the preheat seal 105 is formed before the ultrasonic seal 106 is formed, a sealing failure or edge breakage is less likely to occur.

Further, by forming the pre-heat seal 105, it is less likely that foreign matter will remain in the area where the ultrasonic seal 106 is formed. Therefore, bubbling of inclusions (steam explosion) does not occur when the ultrasonic seal 106 is formed, and the possibility of occurrence of poor sealing such as pinholes and cracks is small.

Therefore, the film packaging bag 100 can achieve the formation efficiency or quality stability of the side seal 104.

[ vertical bag-making, filling and packaging machine 1 ]

Fig. 2 is a side view showing a schematic configuration of the bag-making, filling and packaging machine 1.

Fig. 3 is a front view showing the filling part 30 and the like.

Fig. 5 is a side view showing the cross seal portion 60 and the cut portion 70.

Fig. 6 (a) is a longitudinal sectional view of the heater bar 62, and fig. 6 (b) is a front view of the anvil bar 67.

The vertical bag-making, filling and packaging machine 1 forms a film packaging bag 100 from a strip-shaped film F and fills the film packaging bag 100 with a content X.

The vertical bag-making, filling and packaging machine 1 divides a strip-shaped film F into two parts in the width direction, and manufactures a film packaging bag 100 from the respective divided films F. Thus, the vertical form, fill, and package machine 1 can efficiently produce the film package 100 containing the contents.

The vertical bag-making, filling and packaging machine 1 is controlled by a control unit (not shown) to fill the contents X while intermittently conveying the film F in a downward direction.

The vertical bag-making, filling and packaging machine 1 feeds (seals) the content X into the film packaging bag 100. The film packing bag 100 is filled with the contents X without containing air.

The vertical form-fill-seal packaging machine 1 continuously manufactures the film packaging bags 100 filled with contents.

In the vertical bag-making, filling and packaging machine 1, 2 sets of members and the like are provided on the downstream side of the M-shaped guide 12 described later. These members and the like are arranged in parallel along the conveying direction of the film F.

In the following description, a structure for manufacturing the film package bag 100 from one of the two films F (hereinafter, simply referred to as film F) will be described.

The longitudinal direction of the film F is also referred to as the transport direction. The width direction of the film F is also referred to as the transverse direction.

The longitudinal direction of the film F when the content X is filled is referred to as the vertical direction. The vertical direction is a vertical direction, and the downward direction is a conveying direction of the film F.

The transverse direction (width direction) of the film F when the content X is filled is also referred to as the left-right direction.

The thickness direction of the film F when the content X is filled is also referred to as the front-back direction.

The vertical direction of the vertical form, fill, and package machine 1 corresponds to the lateral direction of the film package pouch 100.

The front-rear direction of the vertical bag-making, filling and packaging machine 1 corresponds to the thickness direction of the film packaging bag 100.

The left-right direction of the vertical form, fill, and package machine 1 corresponds to the longitudinal direction of the film package pouch 100. The right side of the vertical form, fill, and package machine 1 corresponds to the upper portion (top seal 103) side of the film package 100, and the left side of the vertical form, fill, and package machine 1 corresponds to the lower portion (bottom seal 101) side of the film package 100.

The vertical bag-making, filling and packaging machine 1 includes: a bag-making guide section 10, a vertical sealing section 20, a filling section 30, a pattern cutting (design cutter) section 40, a film conveying section 50, a horizontal sealing section 60, and a cutting section 70. These parts are supported by a frame, not shown.

The film F is wound into a roll 3 and supported on a film shaft.

[ bag-making guide portion 10 ]

The bag-making guide 10 includes: a cutter 11, an M-shaped guide 12, a fold-over guide 13, and a tuck-in guide 14.

The cutter 11, the M-shaped guide 12, the fold-in-half guide 13, and the tuck-in guide 14 are arranged in this order in the conveying direction of the film F. The conveying direction of the film F in the bag-making guide 10 is the forward direction (horizontal direction).

The cutter 11 is disposed at the center of the film F in the width direction in the conveying path of the film F. By conveying the film F in the longitudinal direction, the cutter 11 divides the film F into two at the center in the width direction and cuts the film F along the longitudinal direction.

The M-shaped guide 12 is a plate-shaped member having a main surface perpendicular to the conveying direction of the film F. The M-shaped guide 12 guides the split film F to the outside in the width direction of the film F in a state of being twisted by 90 °.

The double-folding guide 13 is a triangular plate-like member. The half-folding guide 13 halves the film F at the center in the width direction using the main surface and 2 oblique sides.

The tuck-in guide 14 is a triangular plate-shaped member disposed adjacent to the fold-back guide 13. The folding guide 14 folds the mountain fold portion of the folded film F into a valley fold, and folds the folded film F into an M-shape. That is, the folding guides 13 and the tuck guides 14 form gussets 100a of the film packaging bag 100.

The bag-making guide section 10 further includes

guide rollers

15 and 16 for guiding the conveyance of the split film F.

The guide roller 15 is disposed between the M-shaped guide 12 and the fold back guide 13, and guides the film F, which is originally directed outward, inward.

The pair of guide rollers 16 is disposed downstream of the tuck-in guide 14, and sandwiches the film F folded in two.

[ longitudinal seal 20 ]

The longitudinal seal section 20 thermally welds the film F in the longitudinal direction using a heating rod. The vertical sealing portion 20 is intermittently driven in synchronization with the intermittent conveyance of the film F.

The longitudinal seal portion 20 forms the film F into a tubular shape. This tube membrane is called thin film Fc.

The vertical seal portion 20 includes: a bottom seal 21, a bottom reinforcing seal 22, a top seal 24, and a top cooling section 25.

The bottom seal portion 21, the bottom reinforcing seal portion 22, the top seal portion 24, and the top cooling portion 25 are arranged in this order in the conveying direction of the film F.

The bottom seal 21 is formed by heat-sealing the gusset 100a of the film F to form a bottom seal 101 on the film F.

The bottom reinforcing seal part 22 is formed by heat-sealing the gusset part 100a of the film F to form a bottom reinforcing seal 102 on the film F. The bottom reinforcing seal portion 22 is disposed on the downstream side (front direction) of the bottom seal portion 21 adjacent to the bottom seal portion 21 in the conveying direction of the film F.

The top seal portion 24 is formed by thermally welding the side ends of the film F to form a top seal 103 on the film F.

The tip cooling section 25 cools the tip seal 103. The top cooling unit 25 is disposed on the downstream side (downward direction) of the top seal unit 24 adjacent to the top seal unit 24 in the conveying direction of the film F.

By cooling the top seal 103 with the top cooling part 25, the film Fc can be immediately transferred to the next process.

A guide roller 23 is disposed between the bottom reinforcing seal portion 22 and the top seal portion 24. The guide roller 23 changes the conveying direction of the film F from the front (horizontal) direction to the lower (vertical) direction.

The film F is conveyed in the horizontal direction (front direction) in the bottom seal portion 21 and the bottom reinforcing seal portion 22, and the film F is conveyed in the vertical direction (down direction) in the top seal portion 24 and the top cooling portion 25.

[ filling section 30 ]

The filling unit 30 includes an input tube 31 and the like, and inputs the content (fluid) X into the film Fc.

The input pipe 31 is disposed between the bottom seal portion 21 and the top seal portion 24 in the conveying direction of the film F. The input pipe 31 is inserted from the side of the film F to the inner surface side, and is bent downward to enter the inside of the film Fc. The input pipe 31 extends downward, and the tip (discharge port) thereof is disposed directly above the lateral seal portion 60.

[ Pattern cutting part 40 ]

The pattern cut portion 40 is arranged downstream (downward) of the top seal portion 24 in the conveying direction of the film F.

The pattern cutting section 40 includes a base cutter 41 and a top cutter 42.

The base cutter 41 aligns the shapes of the base seal 101 and the base seal 102 formed by the base seal portion 21 and the base seal reinforcing portion 22.

The top cutter 42 aligns the shape of the top seal 103 formed by the top seal portion 24.

[ film conveying section 50 ]

The film conveying unit 50 is disposed downstream of the pattern cutting unit 40 and upstream of the tip end of the input tube 31 (input position of the content X) in the conveying direction of the film F.

The film conveying unit 50 includes 1 pair of 2 sets of conveying rollers 51. The pair of conveying rollers 51 are disposed in close contact with the film Fc in the front-rear direction (thickness direction of the film Fc) with the film Fc therebetween. A pair of conveying rollers 51 is disposed on each side in the width (left-right) direction of the film Fc.

The film conveying unit 50 rotates while holding the film Fc between the conveying rollers 51, and conveys (feeds) the film Fc downward.

[ horizontal seal 60 ]

The horizontal seal portion 60 is disposed below the tip end of the input pipe 31, and welds the film Fc across the entire width thereof. The transverse sealing portion 60 forms a side seal 104 on the film Fc.

The lateral seal unit 60 is intermittently driven in synchronization with the intermittent conveyance of the film F. Thus, on the film Fc, the side seals 104 are formed at constant intervals in the up-down direction.

By forming (closing) the side seals 104 on the film Fc, the content X filled in the film Fc is separated vertically with the side seals 104 as boundaries. In addition, when the side seal 104 is formed on the film Fc, a bag body Fa appears at the lower end of the film Fc. The bag Fa is filled with the content X.

The horizontal seal 60 includes a preheat seal 61 and an ultrasonic seal 65.

The preheat sealing portion 61 thermally welds the film Fc in the entire transverse direction using the heating rod 62 and the heat receiving rod 63. The preheat seal portion 61 forms a preheat seal 105 among the side seals 104.

The ultrasonic sealing portion 65 ultrasonically welds the film Fc in the entire transverse direction using a horn bar 66 and an anvil bar 67. The ultrasonic seal portion 65 forms an ultrasonic seal 106 among the side seals 104.

The preheat seal portion 61 and the ultrasonic seal portion 65 are arranged in this order in the conveying direction (downward direction) of the film Fc.

The arrangement interval between the preheat seal portion 61 and the ultrasonic seal portion 65 in the vertical direction is equal to the intermittent conveyance distance of the film Fc. Therefore, the ultrasonic seal unit 65 further ultrasonically welds the portions where the films Fc are thermally welded to each other by the preheat seal unit 61. The ultrasonic seal 106 is formed to overlap the pre-heat seal 105.

That is, the transverse sealing portion 60 performs double-layer (double-pass) welding of the films F to each other in the thickness direction of the films Fc.

The preheat seal portion 61 heats the films F (films Fc) to be incompletely welded to each other. The preheat sealing portion 61 thermally welds the films F to each other to temporarily fix them.

The preheat seal portion 61 is heated for a shorter time than the longitudinal seal portion 20 (the bottom seal portion 21, the bottom reinforce seal portion 22, and the top seal portion 24). Therefore, the preheat seal 105 has lower weld strength than the bottom seal 101, the bottom reinforcement seal 102, and the top seal 103. The pre-heat-seal is also sometimes broken (leaked) when an external force is applied to the film packaging bag 100.

Further, in the manufacture of the film packaging bag 100 containing the contents (until the ultrasonic seal 106 is formed), no external force is applied to the film packaging bag 100, and therefore the pre-heat seal 105 is not broken.

The ultrasonic seal section 65 applies ultrasonic waves to the pre-heat seal 105 to further weld the films F to each other. The ultrasonic seal section 65 sufficiently welds the films F to each other to form an ultrasonic seal 106. The ultrasonic seal 106 has the same welding strength as the bottom seal 101, the bottom reinforcing seal 102, and the top seal 103.

The heater rod 62, the heat receiving rod 63, the horn rod 66, and the anvil rod 67 extend linearly in the left-right direction, respectively. The widths (seal widths) of the seal forming surfaces of the heater bars 62 and 66 are constant.

The seal width of the heater bar 62 and the heat receiving bar 63 is equal to the (downward) width of the side seal 104. The sealing width of the horn rod 66 and the anvil rod 67 is narrower than that of the heater rod 62 and the heat receiving rod 63. For example, the sealing width of the horn rod 66 and the anvil rod 67 is 15mm, and the sealing width of the heater rod 62 and the heat receiving rod 63 is 18 mm. It is preferable that the sealing width of the horn bar 66 and the anvil bar 67 is 50 to 90% of the sealing width of the heating bar 62 and the heat receiving bar 63.

The distance in the vertical direction (distance between centers) between the heater rod 62 and the horn rod 66 coincides with the intermittent transfer distance of the film Fc. Therefore, the ultrasonic seal 106 is configured to be completely overlapped to the preheating seal 105. The ultrasonic seal 106 is overlapped to the center in the vertical direction of the preheat seal 105. The ultrasonic seal 106 is overlapped to the preheating seal 105 symmetrically in the up-down direction. The pre-heat seals 105 are arranged to be exposed by 2mm each in the vertical direction of the ultrasonic seal 106.

As shown in fig. 6 (a), the seal forming surface of the heating rod 62 is uneven, and the center in the seal width direction (up-down direction) slightly protrudes (inclines) toward the film Fc over the entire length in the seal length direction (left-right direction).

In a state where the content X is thrown into the film Fc, the content X is divided in the vertical direction by sandwiching the film Fc between the heating rod 62 and the heat receiving rod 63. At this time, since the seal forming surfaces of the heating rod 62 are slightly inclined in the vertical direction, the content X is pushed out in the vertical direction. That is, the heating rod 62 removes the contents X from the site where the pre-heat-seal 105 is formed. Therefore, almost no inclusions (inclusions X) remain in the preheat seal 105.

Therefore, when the ultrasonic sealing portion 65 applies ultrasonic waves to the preheat seal 105, the inclusions are prevented from foaming (water vapor explosion) and sealing defects such as pinholes and cracks are prevented.

As shown in fig. 6 (b), the seal forming surface of the anvil 67 is not a plane but a pair of parallel strips extending in the seal length direction (left-right direction). The anvil shaft 67 has a non-seal forming region 68 at the center in the seal width direction (up-down direction). The width of the non-seal forming region 68 is, for example, 1 mm. The width of the non-seal forming region 68 is preferably 20% or less of the width of the anvil shaft 67.

Therefore, when the ultrasonic seal portion 65 is formed to overlap the pre-heat seal 105 to form the ultrasonic seal 106, the pre-heat seal 105 extending in the seal length direction remains at the center in the seal width direction. Since the preheat seal 105 corresponds to the non-seal forming region 68, the seal width is 1 mm.

The reason why the non-seal forming region 68 is provided at the center in the seal width direction of the ultrasonic seal 106 is to prevent inclusions from being exposed on the cut surface when the side seal 104 is cut by the cutting portion 70. Even if inclusions remain in the pre-heat seal 105, the inclusions move so as to avoid the horn 66 when the pre-heat seal 105 is gripped (pressed) by the horn 66 and the anvil 67. That is, the inclusions move toward the non-seal forming region 68 of the anvil shaft 67. Therefore, no inclusions remain in the ultrasonic seal 106.

Therefore, even if the side seal 104 (ultrasonic seal 106) is cut by the cutter 70 in the subsequent step, no inclusions are exposed on the cut surface. Therefore, the film packaging bag 100 can be prevented from being contaminated with foreign substances (mold, etc.). In addition, contamination of the cutting portion 70 (the cut 71) can also be prevented.

The lateral seal portion 60 does not include a cooling portion for cooling the preheat seal 105. That is, the cooling portion is not provided downstream of the preheat seal portion 61. This is because the ultrasonic sealing portion 65 functions as a cooling portion for cooling the preheat seal 105.

The horn rod 66 and the anvil rod 67 are made of metal, respectively, and thus have a lower temperature than the film Fc. Further, the inside of the anvil 67 is supplied with cooling water to be cooled. Therefore, when the film Fc is held by the horn rod 66 and the anvil rod 67, the heat of the film Fc (the preheat seal 105) is removed and cooled. Further, since the heating time of the preheat seal portion 61 is short, the ultrasonic seal portion 65 can quickly cool and solidify the preheat seal 105.

In this way, the vertical bag-making, filling and packaging machine 1 can suppress the height of the apparatus to a conventional level because the horizontal sealing section 60 does not require a cooling section.

[ cutting part 70 ]

The cutting section 70 has a cutting bar 71 and cuts the side seals 104 of the film Fc in the entire left-right direction (seal length direction). Thereby, the bag body Fa formed at the lower end of the film Fc is cut off from the film Fc. The film-wrapped bags 100 containing the contents are cut out individually.

The cutting section 70 cuts the center of the side seal 104 in the vertical direction into a band shape.

As described above, the transverse seal portion 60 forms the side seals 104 in which 3 preheating seals 105 and 2 ultrasonic seals 106 are alternately arranged. The cutting section 70 completely cuts off the pre-heat seal 105 disposed between the 2 ultrasonic seals 106. At this time, the cutter 70 cuts the side seals 104 so as to cut off part of each of the 2 ultrasonic seals 106.

Therefore, the side seal 104 of the film packaging bag 100 containing the contents has only the ultrasonic seal 106 on the outer side (cut surface).

The pre-heat seal 105 disposed between the 2 ultrasonic seals 106 does not have a cut surface. Therefore, even if foreign matter remains in the pre-heat seal 105 between the 2 ultrasonic seals 106, the cutting bar 71 is not contaminated by the foreign matter.

Since the horizontal seal portion 60 includes the preheat seal portion 61 and the ultrasonic seal portion 65, the vertical bag-making, filling, and packaging machine 1 can compensate for the disadvantage of ultrasonic welding by the heat welding for temporary fixation while taking advantage of the advantage of ultrasonic welding.

Since the film F is softened when the pre-heat seal 105 is formed in the pre-heat seal portion 61, the ultrasonic seal 106 can be formed in a short time in the ultrasonic seal portion 65.

Even when there is a step in the thickness direction at the portion of the ultrasonic seal portion 65 where the ultrasonic seal 106 is formed, the film F is softened by the formation of the pre-heat seal 105 in the pre-heat seal portion 61, and the step is eliminated. Therefore, the ultrasonic seal 106 can be formed satisfactorily in the ultrasonic seal section 65.

The lateral seal portion 60 is formed by forming a side seal 104 in a state where the film Fc is filled with the content X (immersion seal). In this case, the ultrasonic seal 106 is likely to cause a sealing failure or edge breakage. However, since the preheat seal 105 is formed in the preheat seal portion 61 before the ultrasonic seal 106 is formed in the ultrasonic seal portion 65, poor sealing or edge breakage is less likely to occur.

By forming the pre-heat seal 105 by the pre-heat seal portion 61, it is difficult to leave foreign matter in the portion (pre-heat seal 105) of the ultrasonic seal portion 65 where the ultrasonic seal 106 is formed. Therefore, when the ultrasonic seal 106 is formed in the ultrasonic seal portion 65, bubbling (steam explosion) of inclusions does not occur, and the possibility of occurrence of a sealing failure such as a pinhole or a crack is small.

Therefore, the vertical form, fill, and package machine 1 can achieve the formation efficiency and quality stability of the film package bag 100 (side seal 104).

[ method for producing film packaging bag with Contents 100 ]

Next, a process of manufacturing the film packaging bag 100 filled with the content by using the vertical bag-making, filling and packaging machine 1 will be described.

(film conveying step S1, bag making guide step S2)

First, the film F is drawn from the roll supported by the film shaft 3 and intermittently conveyed toward the bag-making guide 10 by the film conveying unit 50.

Then, the film F passes through the bag-making guide section 10, is divided into two in the width direction, and is further folded in two.

Longitudinal sealing process S3

Next, the film F is conveyed to the longitudinal seal portion 20. In the longitudinal seal 20, the film F first forms a bottom seal 101 and a bottom reinforcement seal 102 from a bottom seal 21 and a bottom reinforcement seal 22.

Then, the film F is conveyed to the lower side via the guide roller 23.

The film F is then conveyed to the top seal portion 24 to form the top seal 103. Thus, the film F becomes a tube shape (film Fc). The film heating conditions in the vertical seal part 20 (bottom seal part 21, bottom reinforcing seal part 22, top seal part 24) are, for example, 130 ℃ and 0.7 seconds.

Then, the film Fc is conveyed to the top cooling section 25, and the bottom seal 101, the bottom reinforcement seal 102, and the top seal 103 are cooled and solidified.

Pattern cutting step S4

Next, the film Fc is conveyed to the pattern cutting section 40, and the base seal 101, the base reinforcing seal 102, and the top seal 103 are cut into a predetermined shape. That is, the shapes of the bottom seal 101, the bottom reinforcement seal 102, and the top seal 103 are aligned.

Filling step S5

Next, the film Fc is transported to the filling section 30 (the tip of the input tube 31), and filled with the content X as a fluid.

Transverse sealing process S6

Next, the film Fc is further conveyed downward and sealed by the horizontal sealing portion 60. The film Fc is sealed in the lateral seal portion 60 in the entire lateral (longitudinal) direction, forming side seals 104.

Preheating sealing process S61

In the horizontal sealing portion 60, first, the film Fc is conveyed to the preheat sealing portion 61 to form the preheat seal 105.

The film heating condition in the preheat sealing portion 61 is, for example, a heating temperature of 130 ℃ and a heating time of 0.4 seconds. In addition, as for the film heating conditions, the heating conditions vary depending on the type of film or filler.

The film heating time for preheating the seal portion 61 is shorter than 0.7 second of the film heating time for the longitudinal seal portion 20. Therefore, the preheat seal 105 has lower weld strength than the bottom seal 101, the bottom reinforcement seal 102, and the top seal 103. The pre-heat seal 105 functions as a temporary fixing.

By forming the pre-heat seal 105 on the film Fc, the content X filled in the film Fc is divided up and down with the pre-heat seal 105 as a boundary.

The seal forming surfaces of the heater bars 62 of the preheat seal portion 61 are slightly inclined in the up-down direction, respectively. Therefore, the content X is pushed out in the vertical direction. Therefore, almost no inclusions (inclusions X) remain in the preheat seal 105.

In addition, by forming the side seal 104 on the film Fc, the bag body Fa appears at the lower end of the film Fc. The bag Fa is filled with the content X.

Ultrasonic sealing Process S62

In the transverse sealing portion 60, the film Fc is then conveyed to the ultrasonic sealing portion 65, forming an ultrasonic seal 106.

The ultrasonic seal 106 is formed to overlap the pre-heat seal 105. The ultrasonic seal 106 is formed by further applying ultrasonic waves to the pre-heat seal 105 to perform welding.

The ultrasonic seal 65 sufficiently welds the films F to each other when forming the ultrasonic seal 106. The vibration conditions in the ultrasonic seal 65 are, for example, a frequency of 30kHz and a vibration time of 0.3 seconds.

Thus, the film Fc is completely sealed by the side seals 104.

Thus, the lateral seal portion 60 forms the side seals 104 in which 3 pre-heat seals 105 and 2 ultrasonic seals 106 are alternately arranged.

Even if foreign matter remains in the preheat seal 105 formed by the preheat seal portion 61, the foreign matter moves so as to avoid the anvil 67 when the anvil 67 grips (presses) the preheat seal 105. Therefore, no inclusions remain in the ultrasonic seal 106.

Therefore, when the side seal 104 (ultrasonic seal 106) is cut by the cutter 70 in the subsequent step, no foreign matter appears on the cut surface.

The side seal 104 is not cooled and solidified by the cooling unit as in the top seal 103 and the like. This is because the ultrasonic sealing portion 65 functions as a cooling portion for cooling the preheat seal 105.

The horn rod 66 and the anvil rod 67 are made of metal, and thus, have a lower temperature than the film Fc. Further, the inside of the anvil 67 is supplied with cooling water to be cooled. Therefore, when the film Fc is held by the horn bar 66, the heat of the film Fc (the preheat seal 105) is taken away and cooled. Further, since the heating time of the preheat seal portion 61 is short, the horn rod 66 can quickly cool the preheat seal 105.

Thus, the cooling of the pre-heat seal 105 does not take time, and the efficiency of manufacturing the film packaging bag 100 with the contents can be improved.

Cutting Process S7

Next, the film Fc is further conveyed downward, and the side seals 104 are cut by the cutter 70.

The cutting portion 70 cuts the side seals 104 in the entire left-right direction by the cutting bar. Thereby, the bag body Fa formed at the lower end of the film Fc is cut off from the film Fc. That is, the film-wrapped bags 100 containing the contents are cut out individually.

The cutting section 70 cuts the center of the side seal 104 in the vertical direction into a band shape. The cutting portion 70 completely cuts off the pre-heat seal 105 disposed between the 2 ultrasonic seals 106. In addition, the cutting portion 70 cuts off a part of each of the 2 ultrasonic seals 106.

Even if foreign substances remain in the pre-heat seal 105 between the 2 ultrasonic seals 106, the cutting bar of the cutting portion 70 is not contaminated by the foreign substances.

Therefore, the side edge (cut surface) of the side seal 104 of the film packaging bag 100 containing the contents is only the ultrasonic seal 106.

In the method of manufacturing the film packaging bag 100 containing the content, the transverse sealing step S6 includes a preheating sealing step S61 and an ultrasonic sealing step S62. Therefore, the ultrasonic welding can be performed with the advantage of ultrasonic welding and the disadvantage of ultrasonic welding can be compensated by the temporarily fixed heat welding.

Since the film F (pre-heat seal 105) is softened by the pre-heat sealing step S61, the ultrasonic seal 106 can be formed in a short time in the ultrasonic sealing step S62.

Even when there is a step in the thickness direction at the location where the ultrasonic seal 106 is formed, the film F is softened by the formation of the heat-seal preliminary 105 in the heat-seal preliminary step S61, and the step is eliminated. Therefore, the ultrasonic seal 106 can be formed satisfactorily in the ultrasonic sealing step S62.

In the horizontal sealing step S6, the side seal 104 is formed (submerged seal) in a state where the film Fc is filled with the fluid (content X). In this case, the ultrasonic seal 106 is likely to cause a sealing failure or edge breakage. However, since the pre-heat seal 105 is formed in the pre-heat sealing step S61 before the ultrasonic seal 106 is formed in the ultrasonic sealing step S62, a sealing failure or edge breakage is less likely to occur.

By forming the pre-heat seal 105, it is less likely that foreign matter remains at the portion where the ultrasonic seal 106 is formed (the pre-heat seal 105). Therefore, bubbling of inclusions (steam explosion) does not occur when the ultrasonic seal 106 is formed, and the possibility of occurrence of poor sealing such as pinholes and cracks is small.

Therefore, in the above-described manufacturing method, the efficiency of forming the film packaging bag 100 (side seal 104) and the stability of quality can be achieved.

The present invention has been described above by way of embodiments, but the present invention is not limited to the above embodiments, and can be arbitrarily modified within the scope of the technical idea of the present invention.

For example, although the bag-making guide section 10 has been described as dividing the film F into two parts, the present invention is not limited thereto.

The bag-making guide 10 may divide the film F into three or more parts, and the package may be manufactured from each part. Further, the package may be manufactured without dividing the film F.

Although the case of manufacturing the vertical pouch type package has been described, the present invention is not limited thereto. A four-side seal type package without the gusset 100a may be manufactured.

The bag is not limited to the four-side seal type, but may be a three-side seal type, a two-side seal type, or a pillow bag having a back seal.

Description of the reference numerals

1 vertical bag-making, filling and packaging machine, 20 longitudinal sealing part, 30 filling part, 50 film conveying part, 60 transverse sealing part, 61 preheating sealing part, 62 heating rod, 65 ultrasonic sealing part, 66 horn rod, 67 anvil rod, 68 non-sealing forming area, 70 cutting part, 100 film packaging bag filled with contents, 101 bottom sealing (sealing part, second sealing, longitudinal sealing), 102 bottom strengthening sealing (sealing part, second sealing, longitudinal sealing), 103 top sealing (sealing part, second sealing, longitudinal sealing), 104 side sealing (sealing part, second sealing, transverse sealing), 105 preheating sealing, 106 ultrasonic sealing, F film, Fc film (tube film), Fa bag body, X contents (fluid).

Claims

1. A film packaging bag containing contents, which is a film packaging bag containing contents and in which fluid is sealed in a film packaging bag having a sealing part formed by welding films to each other,

the above-mentioned film-wrapped bag with its contents is characterized in that,

the sealing portion has a first seal, the first seal including:

a heat pre-seal which is formed by thermally welding the films to each other; and

and an ultrasonic seal formed by further ultrasonically welding the heat-preliminarily sealed portions.

2. The contents-containing film packaging bag according to claim 1,

the sealing part has a second seal including only a heat seal formed by heat-sealing the films to each other,

the heat-sealable seal has a lower weld strength than the second seal.

3. The content-containing film packaging bag according to claim 1 or 2,

the width of the ultrasonic seal is narrower than the width of the pre-heat seal.

4. The contents-containing film packaging bag according to any one of claims 1 to 3,

the width of the ultrasonic seal is 50-90% of the width of the pre-heat seal.

5. The contents-containing film packaging bag according to any one of claims 1 to 4,

the ultrasonic seal and the pre-heat seal are overlapped and arranged on the outer side of the film packaging bag,

the heat seal is only arranged on the inner side of the film packaging bag.

6. The contents-containing film packaging bag according to any one of claims 1 to 5,

the first seals are disposed on opposite side edges of the outer periphery of the film packaging bag, respectively.

7. A vertical bag-making, filling and packaging machine for manufacturing a film packaging bag and sealing a fluid therein,

the vertical bag-making, filling and packaging machine is characterized by comprising:

a film conveying part for conveying the tube film downwards;

a filling unit for feeding a fluid to the inside of the tube film;

a horizontal sealing part for welding the tube film in the whole width direction to form a bag body; and

a cutting part for cutting the bag body from the tube film,

the lateral seal portion includes:

a preheating seal part for heating the pipe film to perform welding; and

and an ultrasonic sealing part for welding the preheating seal formed by the preheating sealing part by further applying ultrasonic waves.

8. The vertical form, fill, and seal machine of claim 7,

a vertical sealing part which forms the tube film by thermally welding strip-shaped films to each other,

the heating time of the preheating sealing part is shorter than that of the longitudinal sealing part.

9. The vertical form, fill, and seal machine of claim 7 or 8,

the ultrasonic sealing part further cools and solidifies the preheating seal.

10. The vertical form, fill, and seal machine of any one of claims 7 to 9,

the sealing width of the ultrasonic sealing part is narrower than that of the preheating sealing part.

11. The vertical form, fill, and seal machine of any one of claims 7 to 10,

the ultrasonic seal portion is formed by superposing the ultrasonic seal portion on the pre-heat seal portion in a vertically symmetrical manner.

12. The vertical form, fill, and package machine of any one of claims 7 to 11,

the ultrasonic seal portion has a non-seal forming region extending in the seal length direction at the center in the seal width direction.

13. The vertical form, fill, and seal machine of claim 12,

the cutting part cuts off a part corresponding to the non-seal forming area in the transverse seal formed by the transverse sealing part.

14. A method for manufacturing a film packaging bag with contents, which is a method for manufacturing a film packaging bag and sealing fluid,

the method for manufacturing the film packaging bag with the content is characterized by comprising the following steps:

a film conveying step of conveying the tube film downward;

a filling step of filling the inside of the tube film with a fluid;

a transverse sealing step of welding the tube film in the entire width direction to form a bag body; and

a cutting step of cutting the bag body from the tube film,

the transverse sealing process comprises the following steps:

a preheating and sealing step of heating the tube film to perform fusion bonding; and

and an ultrasonic sealing step of further applying ultrasonic waves to the pre-heat seal formed in the pre-heat sealing step to perform welding.

15. The method of manufacturing a contents-containing film packing bag according to claim 14,

comprises a longitudinal sealing step of forming the tube film by thermally welding strip-shaped films to each other,

the heat sealing strength of the pre-heat seal formed in the pre-heat sealing step is lower than the heat sealing strength of the vertical seal formed in the vertical sealing step.