JP7694232B2 - Pouch manufacturing method and pouch manufacturing device - Google Patents

Description

The present invention relates to a pouch manufacturing method and a pouch manufacturing apparatus.

Conventionally, as shown in FIG. 7(a), a pouch 110 is known as a container for storing liquid detergent, food, drink, etc., having a bag-making seal section 112 formed by heat welding at a predetermined location on a resin film (see, for example, Patent Document 1). As an example of a method for manufacturing such a pouch 110, as shown in FIG. 7(b), a pouch 110 is manufactured by carrying out a heat sealing process to form a bag-making seal section 112 on a raw film group 120 made of multiple overlapping raw film rolls 121 having multiple pouch-planned regions 122, and a cutting process to cut the raw film group 120 at the boundary between the pouch-planned regions 122.

International Publication No. 2019/106984

In the above-mentioned heat sealing process, as shown in Figures 8 and 9, a heat sealing bar 133a is applied to at least a portion of the bag-making sealing area 123 set on the raw film group 120 to perform heat sealing, and then the raw film group 120 is intermittently moved downstream in the conveying direction by a distance equivalent to one pouch-making area 122, and downstream of the heat sealing bar 133a, a cooling bar 134a is applied to the bag-making sealing area 123 that has been heat sealed to cool it and fix the heat sealing.

However, since the heat-sealing bar 133a and the cooling bar 134a cannot be placed in contact with each other, when the heat-sealing area 133b and the cooling area 134b are set adjacent to each other as shown in FIG. 8, the processing area 134c by the cooling bar 134a must be set narrower than the intended bag-making sealing area 123 by the amount of the gap S set between the heat-sealing bar 133a and the cooling bar 134a. This causes a problem that the fixation of the heat seal in a part of the intended bag-making sealing area 123 that is not cooled (the part corresponding to the gap S) becomes poor, resulting in reduced sealing performance.

As shown in FIG. 9, it is also possible to set the heat sealing area 133b and the cooling area 134b apart by a distance equivalent to one pouch-making area 122. In this case, however, the timing of cooling the heat-sealed bag-making sealing area 123 will be delayed, which may cause problems such as poor adhesion of the heat seal and reduced sealing performance. Also, the production line will be longer by the distance between the heat sealing bar 133a and the cooling bar 134a, which will result in an increase in the size of the pouch production device.

Therefore, the present invention is devised to solve these problems, and has an object to provide a pouch manufacturing method and a pouch manufacturing apparatus which have a simple configuration, achieve good sealing performance , and enable the pouch manufacturing apparatus to be made smaller.

The pouch manufacturing method of the present invention is a method for manufacturing a pouch having a bag-making sealed section formed around a content-accommodating section, an independent sealed section formed vertically spaced apart from the bag-making sealed section, and an unsealed section formed so as to vertically separate the bag-making sealed section and the independent sealed section, by performing a heat-sealing process and a cutting process on a group of original films formed by stacking a plurality of original films extending along a conveying path, wherein a plurality of pouch-planned regions are set in the group of original films aligned in the conveying direction, and each of the pouch-planned regions includes a bag-making sealed section planned region that will become the bag-making sealed section after pouch manufacturing, an independent sealed section planned region that will become the independent sealed section after pouch manufacturing, and an unsealed section planned region that will become the unsealed section after pouch manufacturing, The above-mentioned pouch intended areas are set such that, between adjacent pouch intended areas in the conveying direction, the area intended for bag making seal of one pouch intended area and the area intended for independent seal of the other pouch intended area are continuous in the conveying direction, and the heat sealing process includes a sealing process in which a heat sealing bar is applied to a processing target area in which at least a portion of the area intended for bag making seal of one of the pouch intended areas adjacent in the conveying direction and at least a portion of the area intended for independent seal of the other pouch intended area are continuous in the conveying direction, and then the raw film group is conveyed downstream and a cooling bar installed downstream of the heat sealing bar is applied to the processing target area to cool it, thereby solving the above-mentioned problem.
The pouch manufacturing apparatus of the present invention is a pouch manufacturing apparatus that manufactures a pouch having a bag-making sealing section formed around a content-accommodating section, an independent sealed section formed spaced apart in the vertical direction from the bag-making sealing section, and an unsealed section formed to separate the bag-making sealing section and the independent sealed section in the vertical direction by performing a heat-sealing process and a cutting process on a group of original films formed by stacking a plurality of original films extending along a conveying path, wherein the group of original films has a plurality of pouch-planned regions set in a line in the conveying direction, and each of the pouch-planned regions includes a bag-making sealing section planned to become the bag-making sealing section after the pouch is manufactured, an independent sealed section planned to become the independent sealed section after the pouch is manufactured, and an unsealed section planned to become the unsealed section after the pouch is manufactured, and each of the pouch-planned regions is arranged such that one of the pouch-planned regions is adjacent to the pouch-planned regions in the conveying direction. The area intended for bag-making sealing in one pouch area and the area intended for independent sealing in the other pouch area are set to be continuous in the conveying direction, and the pouch manufacturing apparatus includes a conveying mechanism that conveys the group of raw films along the conveying direction, a heat sealing mechanism that applies the heat sealing process to the group of raw films, and a cutting mechanism that applies the cutting process to the group of raw films, and the heat sealing mechanism has a heat sealing bar that abuts against a processing target area in which at least a portion of the area intended for bag-making sealing in one of the pouch areas adjacent in the conveying direction and at least a portion of the area intended for independent sealing in the other pouch area are continuous in the conveying direction to perform heat sealing, and a cooling bar that is installed downstream of the heat sealing bar and abuts against the processing target area to perform cooling.This solves the above problem .

According to the pouch manufacturing method and pouch manufacturing device of the present invention, the heat sealing process includes a sealing process in which a heat seal bar is applied to a processing target area in which at least a portion of the bag-making seal area of one of the pouch-planned areas adjacent to each other in the conveying direction and at least a portion of the independent seal area of the other pouch-planned area are continuous in the conveying direction, and then the raw film group is conveyed downstream and a cooling bar installed downstream of the heat seal bar is applied to the processing target area to cool it. As a result, even if the heat seal area and the cooling area are installed adjacent to each other, it is possible to install the heat seal bar and the cooling bar apart in the conveying direction by utilizing the unsealed area, so that good heat seal fixation and sealing performance can be ensured by performing heat seal and immediately performing cooling, and the pouch manufacturing device can be made smaller by avoiding a long production line.

Furthermore, the pouch of the present invention has a bag-making sealed section formed around the content-accommodating section, an unsealed section formed from one horizontal edge of the pouch to the other horizontal edge, and an independent sealed section formed vertically spaced apart from the bag-making sealed section across the unsealed section, which makes it possible to employ the pouch manufacturing method described above, and not only can good sealing performance and a compact pouch manufacturing apparatus be achieved, but the following effects can also be achieved.
In other words, according to the pouch of the present invention, by forming an independent sealed portion that is formed vertically away from the bag-making sealed portion and sandwiches the unsealed portion, it is possible to obtain effects that utilize the formation of the unsealed portion while preventing the gap between the films located in the unsealed portion at the outer edge of the pouch from opening up.In other words, it is possible to obtain effects that utilize the formation of the unsealed portion, such as the effect of preventing pain to the user's fingers and hands by using the film located in the unsealed portion, which is not heat-sealed and is highly flexible, as the part that comes into contact with the user's hands and fingers, and the effect of improving the ease of folding the film by utilizing the difference in rigidity between the sealed portion where the film is heat-sealed and the unsealed portion where the film is not heat-sealed.

FIG. 2 is an explanatory diagram showing a pouch according to one embodiment of the present invention. FIG. 2 is an explanatory diagram showing a group of original films used to manufacture the pouch shown in FIG. 1 . FIG. 2 is an explanatory diagram showing a method for manufacturing the pouch shown in FIG. 1 . FIG. 13 is an explanatory diagram showing a modified example of the pouch. FIG. 5 is an explanatory diagram showing a group of original films used to manufacture the pouch shown in FIG. 4 . FIG. 5 is an explanatory diagram showing a method for manufacturing the pouch shown in FIG. 4 . FIG. 1 is a reference diagram showing a conventional pouch and a group of original films. FIG. 8 is a reference diagram showing an example of a method for manufacturing the pouch shown in FIG. 7 . FIG. 8 is a reference diagram showing another example of the method for manufacturing the pouch shown in FIG. 7 .

Below, a pouch manufacturing device 30, which is one embodiment of the present invention, is described with reference to the drawings.

As shown in Figures 1 to 3, the pouch manufacturing device 30 manufactures pouches 10 by performing heat sealing and cutting processes on a group of original films 20, which is made up of multiple layers of original films 21 extending along a conveying path 31.

First, the configuration of the pouch 10 in this embodiment will be described below.

The pouch 10 is made by heat-welding a film 10a made of a flexible resin film at predetermined locations, and contains contents such as liquid detergent, food, and drink. As shown in FIG. 1, the pouch 10 has a bag-making sealed section 12 formed around a content-containing section 11 that contains the contents, an independent sealed section 13 formed at a distance in the vertical direction X from the bag-making sealed section 12, and an unsealed section 14 formed from one edge of the pouch 10 to the other edge in the horizontal direction Y, separating the bag-making sealed section 12 and the independent sealed section 13 in the vertical direction X. The sealed sections 12 and 13 are formed by heat-welding two pieces of film 10a.

As shown in FIG. 1, the pouch 10 has a handle that allows the user to lift the pouch 10 with their hands or fingers. The handle penetration 15 is a slit-like (no material has been removed) or hole-like (material has been removed) handle that penetrates the two films 10a that make up the pouch 10 in the front-to-back direction, a handle piece 16 that is separated from the surrounding area by the handle penetration 15, and a folding connecting part 17 that connects the handle piece 16 to the surrounding area.

At least a portion of the outer edge of the handle through-hole 15 (in this embodiment, the entire outer edge of the handle through-hole 15) is formed in the unsealed portion 14 as shown in FIG. 1, and a handle piece 16 is also formed in the unsealed portion 14.
As shown in FIG. 1 , the folding connecting portion 17 is formed on the outer edge of the handle piece 16 on the side of the independent sealed portion 13, and at least a portion of the folding connecting portion 17 (in this embodiment, the entire portion) extends overlapping the boundary line 18 between the unsealed portion 14 and the independent sealed portion 13.

This prevents the user's fingers from coming into contact with the folded film 10a near the folding connecting portion 17 when lifting the pouch 10 using the handle, thereby preventing the user's fingers from feeling pain.
Furthermore, when using the handle to lift the pouch 10, the portion that comes into contact with the user's fingers is the film 10a located in the unsealed portion 14, which is not heat-welded and is highly flexible (low rigidity), thereby further preventing the user's fingers from feeling pain.
Furthermore, since the outer edge of the handle-piercing portion 15 (handle piece portion 16) is formed in the unsealed portion 14, pain to the user's fingers or hand can be suppressed when the user's fingers or hand come into contact with the outer edge of the handle-piercing portion 15 (handle piece portion 16).
In addition, since the folding connecting portion 17 extends overlapping the boundary line 18 between the unsealed portion 14 and the independent sealed portion 13, the user can easily fold the film 10a at the folding connecting portion 17 by taking advantage of the difference in rigidity between the portion where the film 10a is heat-sealed (independent sealed portion 13) and the portion where the film 10a is not heat-sealed (unsealed portion 14).

As described above, in this embodiment, the film 10a is formed with the handle through-hole 15 to form the handle piece 16 separated from the surrounding area by the handle through-hole 15, and the film 10a is folded at the folding joint 17 to allow the user's finger or hand to pass through the handle piece 16 before folding. However, the handle through-hole 15 may be formed as a hole so that the user's finger or hand can pass through the hole-shaped handle through-hole 15. In this case, it is preferable to form at least a part of the outer edge of the handle through-hole 15 in the unsealed portion 14 to prevent pain in the user's finger or hand when the outer edge of the handle through-hole 15 hits the user's finger or hand.

Next, the raw film group 20 used in manufacturing the pouch 10 will be described below.

As shown in Figures 2 and 3, the original film group 20 is made by stacking multiple original films 21 (two in this embodiment) that extend along the transport path 31, and multiple pouch intended areas 22 that will become pouches 10 after production are arranged in the transport direction so that the vertical direction X of the pouch 10 faces the transport direction (the longitudinal direction of the original film group 20).

As shown in Figure 2, each pouch intended area 22 includes a bag making sealing intended area 23 which will become the bag making sealing section 12 after the pouch 10 is manufactured, an independent sealing intended area 24 which will become the independent sealing section 13 after the pouch 10 is manufactured, and an unsealed area 25 which will become the unsealed section 14 after the pouch 10 is manufactured.
As shown in FIG. 2 , each pouch-intended region 22 has a film-piercing portion-intended portion 26 that will become a handle-piercing portion 15 after the pouch 10 is manufactured.

As shown in Figure 2, between adjacent pouch intended areas 22 in the conveying direction, each pouch intended area 22 is set so that the bag making seal intended area 23 of one pouch intended area 22 (the upstream side in this embodiment) and the independent seal intended area 24 of the other pouch intended area 22 (the downstream side in this embodiment) are continuous in the conveying direction.
Conversely, the bag-making seal intended area 23 of the pouch intended area 22 on the downstream side and the independent seal intended area 24 of the pouch intended area 22 on the upstream side may be set to be continuous in the conveying direction.

Next, the configuration of the pouch manufacturing device 30 will be described below.

As shown in FIG. 3, the pouch manufacturing device 30 includes a conveying mechanism (not shown) that conveys the raw film group 20 along the conveying direction, a heat sealing mechanism 32 that applies a heat sealing process to the raw film group 20, a cutting mechanism (not shown) that applies a cutting process to the raw film group 20, and a control unit (not shown) consisting of a personal computer having a CPU or the like, a PLC, or the like that controls each part of the pouch manufacturing device 30.

The conveying mechanism (not shown) conveys the original film group 20 (original film group 20 before cutting, or original film group 20 before and after cutting), and in this embodiment is configured to intermittently move the original film group 20 in at least a portion of the production line. The conveying distance of the original film group 20 for each intermittent movement is set to the distance of one pouch intended area 22 in the conveying direction.

In this embodiment, the conveying mechanism (not shown) is installed at multiple specified locations in the conveying direction, and is composed of a roller unit (not shown) consisting of a pair of conveying rollers that clamp the raw film group 20 from the front and back (the front and back sides of the paper in Figure 3) and send it out in the conveying direction, and a conveying guide (not shown) that guides the raw film group 20 in the conveying direction.
However, the specific form of the conveying mechanism (not shown) may be anything capable of conveying the raw film group 20 in the conveying direction, such as a mechanism using the above-mentioned conveying rollers, etc., a mechanism using belt drive or air conveyance, or a mechanism formed by combining multiple different driving means.

The heat sealing mechanism 32 forms the bag-making seal section 12 and the independent seal section 13 by applying a heat sealing process to the original film group 20 (original film group 20 before cutting, or original film group 20 before and after cutting), and as shown in FIG. 3, has a heat sealing unit 33 that applies heat sealing to predetermined locations of the original film group 20, and a cooling unit 34 that cools the locations that have been heat sealed by the heat sealing unit 33 to fix the heat sealing.

As shown in Figure 3, the heat welding unit 33 has a metal heat welding bar 33a with a flat press surface that clamps and heat-welds predetermined locations of the raw film group 20 from the front and back (the front and back sides of the page in Figure 3), and a heating means (not shown) consisting of a heater or the like that heats the heat welding bar 33a.
The symbol 33c shown in Figure 3 indicates the processing area on the raw film group 20 where the heat sealing bar 33a is pressed (contacted) against the processing area to perform heat sealing in the first sealing process of the multiple sealing processes included in the heat sealing process by the heat sealing mechanism 32.
In this embodiment, two heat welding bars 33a are provided, one for a first sealing process and the other for a second sealing process, which will be described in detail later.

As shown in Figure 3, the cooling unit 34 has a metal cooling bar 34a with a flat press surface that clamps and cools specific locations of the raw film group 20 from the front and back (the front and back sides of the page in Figure 3), and cooling means (not shown) that cools the cooling bar 34a using cooling water or the like.
The cooling bar 34a is disposed at a distance from the heat welding bar 33a in the conveying direction.
As for the specific form of the cooling bar 34a, any type may be used as long as it is capable of cooling the raw film group 20, but one possible example is a metal backup plate with rubber attached to the press surface side.
The symbol 34c shown in Figure 3 indicates the processing area on the raw film group 20 where cooling is performed by pressing (contacting) the cooling bar 34a against it in the first sealing process of the multiple sealing processes included in the heat sealing process by the heat sealing mechanism 32.
In this embodiment, two cooling bars 34a are provided, one for a first sealing process and the other for a second sealing process, which will be described in detail later.
The raw film group 20 may be cooled in an area wider than the treatment area 34c shown in FIG.

The cutting mechanism (not shown) is installed downstream of the heat sealing mechanism 32 and uses a cutter to perform a cutting process in which the raw film group 20 is cut at the boundary lines between the pouch-intended areas 22 to separate the group into individual pouch-intended areas 22.

In addition, the pouch manufacturing apparatus 30 of this embodiment is equipped with, in addition to the above-mentioned equipment, a penetration processing mechanism (not shown) that uses a cutter or the like to perform penetration processing on the intended film penetration portion 26 of the raw film group 20 in a penetration processing area (not shown) to form the handle penetration portion 15.
The location of the penetration processing mechanism (not shown) may be either downstream or upstream of the cutting mechanism (not shown); that is, the penetration processing may be performed on the original film group 20 before it is cut into units of pouch intended areas 22, or the penetration processing may be performed on the original film group 20 after it has been cut into units of pouch intended areas 22.

Next, the pouch manufacturing method using the pouch manufacturing device 30 will be described below.

First, the heat sealing process in this embodiment includes multiple sealing processes in which the processing target area 27 is thermally sealed by the thermal sealing bar 33a, the raw film group 20 is transported downstream, and the processing target area 27 is cooled by the cooling bar 34a in the cooling area 34b. Figure 3 shows the first of the multiple sealing processes.

That is, in the first sealing process, as shown in FIG. 3, the processing target area 27 of the raw film group 20 that has been sent to the heat sealing area 33b provided on the transport path 31 is first heat-sealed by the heat sealing bar 33a.
As shown in FIG. 3, the processing target area 27 of the raw film group 20 is set as a continuous area in the conveying direction, which is made up of at least a portion of the bag-making sealing planned area 23 of one (the upstream side in this embodiment) of the pouch intended areas 22 adjacent to each other in the conveying direction (a part of the bag-making sealing planned area 23 in this embodiment) and at least a portion of the independent sealing planned area 24 of the other (the downstream side in this embodiment) of the pouch intended area 22 (the entire independent sealing planned area 24 in this embodiment), and in the heat welding area 33b, a common heat welding bar 33a is applied to the processing target area 27 set in this manner to perform heat welding.

The reference numeral 23a in FIG. 3 indicates an unsealed portion of the bag-making sealing area 23 that is not heat-sealed in the first sealing process and is intended for filling the contents in the contents storage section 11.

Next, the raw film group 20 is transported downstream by a transport mechanism (not shown) a distance equivalent to one pouch-designated area 22 in the transport direction to a position (cooling area 34b set adjacent to the heat-sealing area 33b in the transport direction), where a common cooling bar 34a is pressed against the processing target area 27 that has been heat-sealed by the heat-sealing bar 33a to cool it.

The thermal welding of the upstream treatment target area 27 by the thermal welding bar 33a and the cooling of the treatment target area 27 located downstream of the treatment target area 27 by the cooling bar 34a are performed simultaneously (or almost simultaneously).

Then, the raw film group 20 is sent downstream in the conveying direction, and is cut into pouch-intended areas 22 by a cutting process performed by a cutting mechanism (not shown) in a cutting area (not shown), and is then pierced by a piercing process mechanism (not shown) in a piercing process area (not shown) to form the handle piercing portion 15.

Then, downstream of the cutting area (not shown) and the penetration processing area (not shown), the contents are filled into the contents storage section 11 through the unsealed section for filling 23a by the contents filling mechanism, and then, as the second sealing process of the heat sealing process in this embodiment, the film 10a is heat-sealed and cooled in the unsealed section for filling 23a as the processing target area using the heat sealing bar (not shown) and cooling bar (not shown) of the heat sealing mechanism 32, thereby performing a sealing process between the film 10a in the unsealed section for filling 23a.

In this embodiment, various processes such as heat welding by the heat welding unit 33 (heat welding bar 33a), cooling by the cooling unit 34 (cooling bar 34a), cutting by the cutting mechanism (not shown), and penetration processing by the penetration processing mechanism (not shown) are performed when the conveying mechanism (not shown) stops moving intermittently.

Although the embodiments of the present invention have been described above in detail, the present invention is not limited to the above embodiments, and various design modifications can be made without departing from the invention described in the claims. For example, the embodiments and modifications described above or below may be combined in any manner.

For example, the specific embodiment of the film 10a constituting the pouch 10 may be a film having a heat-sealable layer on at least one side, such as a low-density polyethylene or polypropylene olefin-based film, or a polyester-based film such as PET, and may be a single heat-sealable layer or a heat-sealable layer to which any other layer is laminated. Any material may be used to form the laminate, and any desired layer may be formed by laminating known polyesters, polypropylene, polyamide, polyethylene, polybutylene terephthalate, aluminum foil, etc.

In the above embodiment, the pouch 10 is described as being configured as a so-called flat pouch formed by heat-welding two sheets of film 10a at predetermined locations, but the specific form of the pouch 10 may be any form formed by heat-welding one or more sheets of film 10a at predetermined locations, such as a so-called horizontal gusset-type pouch with gussets formed on both the left and right sides as shown in FIG. 4, a so-called standing pouch with a gusset on the bottom side, or a pouch with a spout in which a spout is attached to a predetermined location of the film 10a.

In addition, in the above-described embodiment, as shown in FIG. 3, it has been described that a plurality of pouch intended areas 22 are set in the raw film group 20 so as to be arranged in a row along the conveying direction, but the pouch intended areas 22 may also be set in a plurality of rows in the left-right direction perpendicular to the conveying direction in the raw film group 20.
In this case, the processing target area 27 onto which the heat welding bar 33a and the cooling bar 34a are applied can be set so as to span the pouch intended areas 22 (the bag making sealing intended area 23 and the independent sealing intended area 24) lined up in the left-right direction, and the cutting process in the cutting mechanism (not shown) also cuts the boundary lines between the pouch intended areas 22 in the left-right direction.

In addition, in the above-mentioned embodiment, the heat sealing process by the heat sealing mechanism 32 is described as achieving the formation of the bag-making seal portion 12 and the independent seal portion 13 by a first sealing process in which heat sealing is performed by the heat sealing bar 33a and cooling is performed by the cooling bar 34a on the treatment target area 27 as shown in FIG. 3, and a second sealing process in which heat sealing is performed by the heat sealing bar (not shown) and cooling is performed by the cooling bar (not shown) on the position corresponding to the unsealed portion for filling 23a.
However, the heat sealing process by the heat sealing unit 33 of the present invention includes at least one sealing process in which heat sealing is performed by the heat sealing bar 33a and cooling is performed by the cooling bar 34a on a processing target area 27 in which at least a portion of the bag-making seal area 23 of one pouch intended area 22 and at least a portion of the independent seal area 24 of the other pouch intended area 22 are continuous in the conveying direction, and the number of sealing processes and the processing target area may be set arbitrarily depending on the embodiment, as long as the formation of the bag-making seal section 12 and the independent seal section 13 is achieved.

Here, as an example of a modified example of the heat sealing process by the heat sealing unit 33, Fig. 6(a) and (b) show a heat sealing process by the heat sealing unit 33 for producing the pouch 10 shown in Fig. 4 by performing various processes on the raw film group 20 shown in Fig. 5. Note that Fig. 6(a) and (b) show only two sealing processes out of the multiple sealing processes included in the heat sealing process required to form the bag-making seal portion 12 and the independent seal portion 13 of the pouch 10 shown in Fig. 4.
The pouch 10 shown in FIG. 6 is formed as a so-called horizontal gusset type pouch consisting of front and back films 10a and left and right gusset film 10a disposed on the left and right sides.
4 to 6, parts that function similarly to the example shown in FIGS. 1 to 3 are denoted by the same reference numerals as in FIGS.

In addition, in the above-described embodiment, the pouch manufacturing apparatus 30 (pouch manufacturing method) has been described as performing the sealing process in the unsealed filling section 23a and manufacturing a pouch 10 in which the entire area of the bag-making sealing section 12 has been formed.
However, the pouch manufacturing apparatus 30 (pouch manufacturing method) of the present invention only needs to manufacture pouches 10 having at least a portion of the bag-making sealed section 12, at least a portion of the independent sealed section 13, and an unsealed section by performing the heat sealing process, including at least one sealing process, and cutting process on the raw film group 20 as described above. In other words, the pouches 10 of the present invention also include pouches in which a portion of the bag-making sealed section 12 (such as the unsealed section 23a for filling shown in FIG. 3) is not formed, and pouches in which a portion of the independent sealed section 13 is not formed, etc.
In this case, for example, heat welding to form a part of the above-mentioned bag making seal portion 12 or a part of the independent seal portion 13 can be performed by another device installed in a separate facility. For example, for a pouch 10 having an unsealed portion for filling 23a manufactured by the pouch manufacturing apparatus 30 (pouch manufacturing method) of the present invention, heat welding can be performed on the unsealed portion for filling 23a after the contents are filled by another device installed in a separate facility.

In addition, in the above-described embodiment, the pouch 10 is manufactured by subjecting the raw film group 20 to a heat sealing process (thermal welding and cooling) by the heat sealing mechanism 32, a cutting process by a cutting mechanism (not shown), and a piercing process by a piercing process mechanism (not shown).
However, depending on the type of pouch 10 to be manufactured, any processing such as cutting or folding of the film 10a, or attaching a spout to the film 10a may be performed on the original film group 20 (the original film group 20 before or after the cutting process) before or after the cutting process, and it is not necessary to perform a piercing process using a piercing process mechanism (not shown).
The order and timing of the various processes such as the heat sealing process and the piercing process described above may be set arbitrarily depending on the type of pouch 10 to be manufactured.

LIST OF SYMBOLS 10 Pouch 10a Film 11 Contents storage section 12 Bag-making sealing section 13 Independent sealed section 14 Unsealed section 15 Handle-penetrating section 16 Handle piece section 17 Folding connection section 18 Boundary line between unsealed section and independent sealed section 20 Original film group 21 Original film 22 Pouch-designated area 23 Bag-making sealing designated area 23a Unsealed section for filling 24 Independent sealed area 25 Unsealed area 26 Film-penetrating section designated area 27 Area to be processed 30 Pouch manufacturing device 31 Transport path 32 Heat-sealing mechanism 33 Heat-sealing unit 33a Heat-sealing bar 33b: heat welding area 33c: processing area 34: cooling unit 34a: cooling bar 34b: cooling area 34c: processing area X: vertical direction Y: horizontal direction

Claims (4)

A pouch manufacturing method for manufacturing a pouch having a bag-making sealed section formed around a content-accommodating section, an independent sealed section formed vertically spaced apart from the bag-making sealed section, and an unsealed section formed vertically separating the bag-making sealed section and the independent sealed section, by performing a heat-sealing process and a cutting process on a group of original film webs formed by stacking a plurality of original film webs extending along a conveying path, the method comprising the steps of:
A plurality of pouch-planned areas are set in the raw film group in a conveying direction,
Each of the pouch intended regions includes a bag-making sealing intended region that will become the bag-making sealing portion after the pouch is manufactured, an independent sealing intended region that will become the independent sealed portion after the pouch is manufactured, and an unsealed intended region that will become the unsealed portion after the pouch is manufactured,
The pouch planned areas are set such that, between the pouch planned areas adjacent to each other in the conveying direction, the bag-making seal planned area of one of the pouch planned areas and the independent seal planned area of the other pouch planned area are continuous in the conveying direction,
The pouch manufacturing method includes a sealing process in which a heat sealing bar is applied to a processing target area in which at least a portion of the bag-making seal planned area of one of the pouch planned areas adjacent in the conveying direction and at least a portion of the independent seal planned area of the other pouch planned area are continuous in the conveying direction, to perform heat sealing, and then the raw film group is conveyed downstream and a cooling bar installed downstream of the heat sealing bar is applied to the processing target area to perform cooling. The pouch manufacturing method includes intermittently moving the group of raw films along a conveying direction, and performing heat welding by the heat welding bar and cooling by the cooling bar when the group of raw films is stopped,
2. The pouch manufacturing method according to claim 1, wherein a transport distance of the group of original films for each intermittent movement is set to a distance equivalent to one of the pouch-planned areas in the transport direction. The pouch manufacturing method according to claim 2, characterized in that, in the sealing process, after the heat sealing bar is used to heat seal the area to be treated, the raw film group is transported downstream in the transport direction by a distance equivalent to one of the pouch-planned areas, and the cooling bar is applied to the area to be treated to cool it. A pouch manufacturing device that manufactures a pouch having a bag-making sealed section formed around a content-accommodating section, an independent sealed section formed vertically spaced apart from the bag-making sealed section, and an unsealed section formed vertically separating the bag-making sealed section and the independent sealed section, by performing a heat-sealing process and a cutting process on a group of original film webs formed by stacking a plurality of original film webs extending along a conveying path, the pouch manufacturing device comprising:
A plurality of pouch-planned areas are set in the raw film group in a conveying direction,
Each of the pouch intended regions includes a bag-making sealing intended region that will become the bag-making sealing portion after the pouch is manufactured, an independent sealing intended region that will become the independent sealed portion after the pouch is manufactured, and an unsealed intended region that will become the unsealed portion after the pouch is manufactured,
The pouch planned areas are set such that, between the pouch planned areas adjacent to each other in the conveying direction, the bag-making seal planned area of one of the pouch planned areas and the independent seal planned area of the other pouch planned area are continuous in the conveying direction,
The pouch manufacturing apparatus includes a conveying mechanism that conveys the raw film group along a conveying direction, a heat sealing mechanism that applies the heat sealing treatment to the raw film group, and a cutting mechanism that applies the cutting treatment to the raw film group,
The heat sealing mechanism is a pouch manufacturing apparatus characterized in that it has a heat sealing bar that abuts against a processing target area in which at least a portion of the bag-making seal planned area of one of the pouch planned areas adjacent in the conveying direction and at least a portion of the independent seal planned area of the other pouch planned area are continuous in the conveying direction to perform heat sealing, and a cooling bar that is installed downstream of the heat sealing bar and abuts against the processing target area to perform cooling.

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