JP2024022552A - Pouch manufacturing method and pouch manufacturing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pouch manufacturing method and a pouch manufacturing device capable of improving handling ability of a pouch after manufacturing a pouch.

SOLUTION: A pouch manufacturing method for manufacturing a pouch P includes applying thermal welding treatment to a thermal welding target part of a long first film material F1 and a second film material F2 sent along a transportation passage R in a thermal welding area A set in the transportation passage R, wherein the pouch manufacturing method is characterized by that, in the thermal welding treatment applied repeatedly, a thermal welding target part F1' of the first film material F1 and a thermal welding target part F2' of the second film material F2 having a size in a film longitudinal direction under unloaded condition being larger than the thermal welding target part F1' of the first film material F1 are applied with thermal welding by sandwiching with a thermal welding bar 61 in the film surface and rear directions.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

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

Conventionally, pouches made of flexible resin film materials by thermal bonding have been used to store various fluid contents such as sanitary products such as detergents and shampoos, and food products such as soy sauce and seasonings. It is widely used as a packaging container for packaging, and in particular, it is frequently used as a packaging container called a refill pouch, which is used by refilling the contents into other containers such as plastic bottles and glass bottles.

For example, as shown in Patent Document 1 below, such a pouch is made by sequentially unrolling a long resin film wound into a roll, and attaching it to two upper and lower film materials and their sides. The sandwiched bottom film material is continuously conveyed, and heat welding processing is performed to thermally bond both sides in the film conveyance direction (vertical direction) and the transverse portions at predetermined intervals extending in the film width direction (horizontal direction), and the adjacent The pouches are manufactured by cutting the film material at cut lines set between the pouches and separating the pouches into individual pouches.

Japanese Patent Application Publication No. 2007-168147

However, when the pouch manufactured as described above is placed flat on a horizontal surface, some or all of the four corners may float, which is so-called warpage. The causes of such warpage are the uneven thickness of the film material, slipperiness, orientation of the biaxially stretched film (twisting due to anisotropy), pitch elongation and shrinkage in the film lamination process, etc. of the raw film itself. It is assumed that this is a combination of various factors such as characteristics.

In addition, if only a portion of the manufactured pouches warps, or if pouches with different warp directions are mixed together, it becomes difficult to handle the pouches after they are manufactured. there were.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and aims to provide a pouch manufacturing method and a pouch manufacturing apparatus that have a simple configuration and improve the handling of the pouch after manufacturing. be.

In the pouch manufacturing method of the present invention, in a heat welding area set on a conveyance path, a heat welding area of a long first film material and a second film material sent along the conveyance path is A pouch manufacturing method in which a pouch is manufactured by performing a heat welding process, wherein in the heat welding process that is repeatedly performed, the heat welding location of the first film material and the longitudinal dimension of the film in an unloaded state are The problem is solved by performing heat welding by sandwiching the heat welding area of the second film material, which is larger than the heat welding area of the first film material, between heat welding bars in the front and back directions of the film. It is something to do.
In a heat welding area set on a conveyance path, the pouch manufacturing apparatus of the present invention applies heat welding points to heat welded parts of the elongated first film material and second film material sent along the conveyance path. A pouch manufacturing apparatus that manufactures pouches by performing a heat welding process, wherein in the heat welding process that is repeatedly performed, the heat welding location of the first film material and the longitudinal dimension of the film in an unloaded state are The heat welding is performed by sandwiching the heat welding location of the second film material, which is larger than the heat welding location of the first film material, between heat welding bars in the front and back directions of the film. This solves the above problem.

According to the inventions according to claims 1, 19, and 20, in the heat welding process that is repeatedly carried out, the heat welded portion of the first film material and the lengthwise dimension of the film in the no-load state are the same as the heat welded portion of the first film material. Heat welding is performed by sandwiching the heat welding area of the second film material, which is larger than the welding area, with a heat welding bar in the front and back directions of the film, thereby guiding the direction of warpage that occurs in the manufactured pouch in one direction. In other words, it is possible to induce the warpage of the pouch so that the corners of the pouch are closer to the first film material side, and to suppress the mixture of pouches with different warp directions in the manufactured pouches. The subsequent handling of the pouch can be improved.

According to the invention according to claim 2, in the first processing area, the heat-welded portion of the second film material is moved closer to the first film material side as it goes downstream in the film transport direction, or from the first film material side. By tilting them away from each other, with a simple structure, the longitudinal dimension of the film in the no-load state of the heat-welded part of the second film material, which is sandwiched between the heat-welding bars, is equal to that of the heat-welded part of the first film material. The longitudinal dimension of the film can be made larger than the length in the no-load state.
According to the invention according to claim 3, by pushing the second film material in the direction away from the first film material by the guide member on the upstream side of the heat welding area, the second film material is pushed in the direction away from the first film material in the first processing area with a simple configuration. The heat-welded location of the two film materials can be tilted.
According to the invention according to claim 4, the guide member is installed upstream of the heat welding area and downstream of the film merging section, so that it can be guided to an existing pouch manufacturing apparatus equipped with a film merging section. With a simple configuration in which only an additional member is provided, it is possible to tilt the heat-welded portion of the second film material in the first processing area.
According to the invention according to claim 5, the guide member is provided so as to be movable in the front and back directions of the film, so that when performing heat welding treatment, the guide member pushes the second film material and presses the second film material. It is possible to avoid pushing the second film material by the guide member when sending it to the downstream side, so that the second film material can be transported smoothly.
According to the invention according to claim 6, by pushing the second film material with the guide member, in the first processing area, the center part in the width direction of the second film material is farther away from the first film material than the both sides in the width direction. By setting the pouch in a state where it is biased in the direction, it is possible to reliably induce the warping mode of the pouch so that the corners of the pouch are biased toward the first film material side.
According to the invention according to claim 7, by making the tension of the first film material larger than the tension of the second film material in the heat welding area, the second film sandwiched between the heat welding bars has a simple structure. The lengthwise dimension of the film in the no-load state of the heat-welded portion of the material can be made larger than the lengthwise dimension of the film in the no-load state of the heat-welded portion of the first film material.
According to the invention according to claim 8, the film material can be smoothly conveyed while maintaining the tension of the film material.
According to the inventions according to claims 9 to 13, the tension of the first film material in the heat welding area can be easily made larger than the tension of the second film material with a simple configuration.
According to the invention according to claim 14, the heat shrinkage rate of the first film material is larger than that of the second film material, so that the corners of the pouch are closer to the first film material side. In this way, the pouch can be reliably warped.
According to the invention according to claim 15, heat welding is performed between the plurality of upstream heat welding bars with the first film material and the second film material having different lengths in the width direction. By doing this, it is possible to make the film width direction dimensions in the unloaded state of the first film material and the second film material different during the width direction welding process by the downstream welding bar, and to reduce the warping that occurs in the manufactured pouch. By guiding the direction in one direction, it is possible to prevent pouches having different warpage directions from being mixed in the manufactured pouches, thereby improving the handling properties of the pouches after the pouches are manufactured.
According to the invention according to claim 16, by pushing the second film material in the direction away from the first film material by the guide member, the first film material and the second film material are bonded together during the widthwise welding process by the upstream heat welding bar. It is possible to make the film width direction dimensions of the two film materials different under no-load conditions, to guide the direction of warpage that occurs in manufactured pouches in one direction, and to prevent pouches that warp in different directions from coexisting in the manufactured pouches. Since it is possible to suppress the pouch from being put away, it is possible to improve the handling properties of the pouch after the pouch is manufactured.
According to the invention according to claim 17, by pressing both the first film material and the second film material with the guide member, the first film material and the second film material are free from each other during the welding process by the heat welding bar. It is possible to vary the dimensions of the film under load, guide the direction of warpage that occurs in manufactured pouches in one direction, and prevent pouches with different warp directions from being mixed in the manufactured pouches. It is possible to improve the handling properties of the pouch after the pouch is manufactured.
According to the invention according to claim 18, by pushing either the first film material or the second film material with the guide member so as to be inclined in the conveyance direction, during the width direction welding process by the upstream heat welding bar, , the longitudinal dimension and width dimension of the first film material and the second film material in an unloaded state can be made different at the same time, and the direction of warpage occurring in the manufactured pouch is guided in one direction, so that the manufactured pouch is manufactured. Since it is possible to suppress pouches having different warpage directions from being mixed together, it is possible to improve the handling properties of the pouches after the pouches are manufactured.

FIG. 1 is an explanatory diagram showing a pouch manufacturing apparatus according to an embodiment of the present invention. FIG. 6 is an explanatory diagram showing a state in which the second film material is pushed by the guide member. FIG. 3 is an explanatory diagram showing how the guide member is installed when viewed from above. FIG. 7 is an explanatory diagram showing a modification of the installation mode of the guide member as seen from above. FIG. 3 is an explanatory diagram showing the configuration of first and second conveyance paths. FIG. 3 is an explanatory diagram showing the configuration of first and second conveyance paths. An explanatory diagram showing an example of a manufactured pouch. FIG. 7 is an explanatory diagram showing a state in which the second film material is pushed by the guide member of the second embodiment. FIG. 7 is an explanatory diagram showing a state in which the second film material is pushed by the guide member of the third embodiment. FIG. 7 is an explanatory diagram showing a state in which the second film material is pushed by the guide member of the fourth embodiment.

Below, a pouch manufacturing apparatus 10 and a pouch manufacturing method that are one embodiment of the present invention will be described based on the drawings.

In a heat welding area A set on a conveyance path R, the pouch manufacturing apparatus 10 heat-welds the elongated first film material F1 and second film material F2 sent along the conveyance path R. By sequentially performing heat welding treatment on the pouch P, a flexible resin film is heat welded at predetermined locations to continuously produce a pouch P as a bag-like packaging container.

In this embodiment, as shown in FIG. 7, the pouch P includes a first film material F1 and a second film material F2 made of resin films arranged to face each other, and a first film material F1 and a second film material F2 at the bottom thereof. The bottom film material F3 is made of a resin film and is placed between the film materials F2 in a folded state. By forming the bottom seal portion S1 and side seal portion S2 shown in FIG. 7, the pouch is configured as a standing pouch having a gusset at the bottom.
In addition, in the pouch P manufactured by the pouch manufacturing apparatus 10, the top seal scheduled location S3 shown in FIG. 7 is not thermally welded. This top seal scheduled location S3 is a location that is heat welded after the contents are filled into the pouch P.

Each component of the pouch manufacturing apparatus 10 will be explained below based on the drawings.

First, as shown in FIG. 1, the pouch manufacturing apparatus 10 includes a film transport facility 20 that transports film materials F, F1, F2, and F3 along the film transport direction, and a heat welding process for film materials F1, F2, and F3. The pouch manufacturing apparatus 10 includes a heat sealing mechanism 60 that performs the cutting process, a cutting mechanism 70 that performs the cutting process, and a control unit (not shown) consisting of a personal computer, PLC, or the like having a CPU or the like that controls each part of the pouch manufacturing apparatus 10.

As shown in FIG. 1, the film transport equipment 20 includes a continuous feed mechanism 30 that continuously feeds film materials F, F1, and F2, and an intermittent feed mechanism that feeds film materials F1, F2, and F3 intermittently downstream of the continuous feed mechanism 30. It includes a feed mechanism 50 and a feed adjustment mechanism 40 provided between the continuous feed mechanism 30 and the intermittent feed mechanism 50.

As shown in FIG. 1, the continuous feed mechanism 30 includes a film supply section 31 that supplies the film material F before division, a continuous feed roll group 32 installed on the downstream side of the film supply section 31, and a continuous feed roll group 32. The dividing means 33 is provided on the downstream side of the dividing means 33.

As shown in FIG. 1, the film supply unit 31 is configured to pivot around a horizontal axis a raw roll R in which a pre-divided film material F is wound into a roll.
As shown in FIG. 1, the continuous feed roll group 32 is composed of a plurality of feed rolls supported around a vertical axis and driven by a control drive unit (not shown) consisting of a motor, etc., and feeds the film material F before division. It is configured to feed continuously.
As shown in FIG. 1, the undivided film material F pulled out horizontally from the film supply section 31 is passed around a plurality of inclined guide roll groups, deflected along a vertical plane, and then transferred to a continuous feed roll. Group 32 is fed.
The dividing means 33 is composed of a cutter or the like, and as shown in FIG. 1, divides the undivided film material F at the center and continuously divides it into an upper first film material F1 and a lower second film material F2. is configured to do so.
The divided film materials F1 and F2 are again deflected along the horizontal plane by the dividing means 33 and fed to the downstream feed adjustment mechanism 40.

In the feed adjustment mechanism 40, as shown in FIG. 1, the film materials F1 and F2 fed from the continuous feed mechanism 30 are fed along symmetrical paths spaced vertically, and at the downstream film merging section 43, The sheets are overlapped with each other by the overlapping roll 43a and fed to the intermittent feed mechanism 50.

Here, the above-mentioned film merging section 43 is provided on the conveyance path R (more specifically, the merging conveyance path R3 to be described later), and is arranged between the first film material F1 and the second film material on the upstream side of the thermal welding area A. This is the part where the materials F2 are merged so as to be in contact with each other.
In this embodiment, as shown in FIG. 1, the bottom film material F3, which functions as the bottom material of the standing pouch after manufacturing, is supplied from before the film merging section 43, and the upper and lower two sheets are separated at the film merging section 43. The film materials F1 and F2 are overlapped and sandwiched between both sides of the film materials F1 and F2.

Among the upper and lower routes of the feed adjustment mechanism 40 (the upper route for sending the first film material F1 and the lower route for sending the second film material F2), the upper route (first conveyance route R1 to be described later) is As shown in FIG. 1, a plurality of first guide rolls 41 each having a cylindrical outer peripheral surface and configured as driven rolls that rotate by contact with the film materials F1 and F2 to be fed are installed. The first guide roll 41 includes at least one first dancer roll 41a and at least one first tension detection roll 41b, which function as tension control means for controlling (adjusting) tension fluctuations occurring in the film materials F, F1, and F2. and is included.

Similarly, as shown in FIG. Two guide rolls 42 are installed, and the plurality of second guide rolls 42 include at least one second dancer roll 42a configured similarly to the first dancer roll 41a, and at least one second dancer roll 42a configured similarly to the first tension detection roll 41b. and at least one second tension detection roll 42b.

As shown in FIG. 1, the dancer rolls 41a and 42a are provided so as to be able to swing back and forth in the direction of the arrow shown in FIG. 1, and are configured to be swing-driven by a drive source (not shown) such as an actuator or a motor. ing.
Tension sensors (not shown) are connected to the tension detection rolls 41b and 42b to detect the force applied to their rotational shafts, and are configured to detect the tension of the film materials F1 and F2.

In the intermittent feed mechanism 50, as shown in FIG. 1, an intermittent feed roll 51 installed at the most downstream feeds two film materials F1 and F2, which are stacked on top of each other with a bottom film material F3 in between, in predetermined amounts. It is configured for intermittent feeding.

A two-dimensional optical sensor (not shown) is installed in the section between the film confluence section 43 and the intermittent feed roll 51 to detect the position of the film material by detecting a plurality of marks provided on the surface of the film material. ing.

As shown in FIG. A heat sealing mechanism 60 is provided for performing a welding process.

As shown in FIGS. 1 and 5, the conveyance path R includes a first conveyance path R1 that conveys the first film material F1 alone, a second conveyance path R2 that conveys the second film material F2 alone, and a second conveyance path R2 that conveys the second film material F2 alone. The first film material F1 and the second film material are provided on the downstream side of the first transport route R1 and the second transport route R2, and are arranged such that the inner surfaces of the first film material F1 and the second film material F2 are opposed to each other (in contact with each other). It includes a combined conveyance path R3 that merges and conveys the material F2, and an upstream conveyance path R4 that is provided upstream of the first conveyance path R1 and the second conveyance path R2 and conveys the pre-divided film material F. .

In this embodiment, as shown in FIG. 1 and FIG. The upstream transport path R4 is a section from the film supply section 31 to the dividing means 33.

As shown in FIG. 5, the plurality of first guide rolls 41 described above are installed on the first conveyance path R1, and as shown in FIG. A plurality of first inner guide rolls 41c installed so as to contact the inner surface of the first film material F1, and a plurality of first outer guide rolls 41d installed so as to contact the outer surface of the first film material F1 are included.

Similarly, as shown in FIG. 5, the plurality of second guide rolls 42 described above are installed on the second conveyance path R2, and as shown in FIG. A plurality of second inner guide rolls 42c installed so as to contact the inner surface of the film material F2, and a plurality of second outer guide rolls 42d installed so as to contact the outer surface of the second film material F2. included.

As shown in FIGS. 1 and 2, the heat sealing mechanism 60 is a flat member that heat-seals predetermined portions of the film materials F1, F2, and F3 by sandwiching them in the front and back directions of the film (in the case of the present embodiment, the top and bottom directions). A heating means (not shown) consisting of a plurality of metal heat welding bars 61 having a pressing surface 61a, a heater etc. that heats the heat welding bars 61, and predetermined locations of the film materials F1, F2, F3 in the front and back directions of the film. A plurality of metal cooling bars 62 having flat pressing surfaces that are sandwiched in the vertical direction (in the case of this embodiment) to perform cooling, and a cooling means (not shown) that cools the cooling bars 62 using cooling water or the like. (not).
The flat pressing surface 61a of each heat welding bar 61 and the flat pressing surface of each cooling bar 62 are formed perpendicular to the front and back direction (vertical direction) of the film.

As shown in FIG. 1, in the heat welding area A, a plurality of processing areas A-1 and A-2 are set side by side in the film conveyance direction to perform heat welding processing, and in this embodiment, the plurality of processing areas A- 1, A-2 includes a first processing area A-1 set to the most upstream side of the plurality of processing areas A-1 and A-2, and a second processing area A- set to the downstream side thereof. 2. Two processing areas A-1 and A-2 are included.
As shown in FIG. 1, in the first processing area A-1, there is a thermal welding bar 61 (and a cooling In addition, in the second processing area A-2, a side seal portion S2 (in this embodiment, a side seal portion S2) having a shape extending along the film width direction, which is a direction perpendicular to the film transport direction, is arranged. A heat welding bar 61 (and cooling bar 62) is arranged.
Note that the arrangement and number of the heat welding bars 61 (and cooling bars 62) in the heat welding area A, as well as the portions formed by the heat welding bars 61 (and cooling bars 62), are not limited to those described above, and are similar to those in the embodiment. It can be set arbitrarily depending on the situation. For example, if the pouch P to be manufactured is not a standing pouch but a so-called flat pouch, the top seal part or bottom seal part of the pouch P is formed by heat welding in the first processing area A-1, and the top seal part or bottom seal part of the pouch P is formed in the second processing area A-2. The side seal portion of the pouch P may be formed by thermal welding. Alternatively, the side seal portion of the pouch P may be formed by thermal welding in the first processing area A-1, and the top seal portion or the bottom seal portion of the pouch P may be formed by thermal welding in the second processing area A-2. .

Further, downstream of the intermittent feed roll 51, a cutting mechanism 70 consisting of a cutter or the like is disposed, and the cutting mechanism 70 cuts the film materials F1, F2, and F3 that have been subjected to heat welding treatment to individually cut the film materials F1, F2, and F3. It is configured to be cut and separated into pouches P.
In addition, the code|symbol P1 shown in FIG. 3 has shown the area|region which becomes each pouch P after a cutting process.

A control unit (not shown) of the pouch manufacturing apparatus 10 controls the film materials F and F1 due to periodic fluctuations in the film feed amount between the continuous feed in the continuous feed mechanism 30 and the intermittent feed in the intermittent feed mechanism 50. , F2 is configured to perform tension control to control (adjust) tension fluctuations occurring in F2.

Specifically, the control unit (not shown) of the pouch manufacturing apparatus 10 includes a drive control unit (not shown) including motors for the dancer rolls 41a and 42a, and a control drive unit (not shown) including the motors for the continuous feed roll group 32. ), a drive control unit (not shown) consisting of a motor for the intermittent feed roll 51, etc., the above-mentioned tension sensor (not shown), the above-mentioned two-dimensional optical sensor (not shown), etc. Based on the information, the drive of the dancer rolls 41a and 42a (reciprocating swing speed, swing width, drive timing), the drive of the intermittent feed roll 51 (drive speed, drive timing), and the drive of the continuous feed roll group 32 (drive By controlling the speed), the slack of the film materials F1 and F2 is absorbed, and the tension of the film materials F1 and F2 is controlled (adjusted).

Next, the pouch manufacturing method in this embodiment will be described below.

First, as shown in FIG. 1, the undivided film material F supplied from the film supply section 31 is divided into the first film material F1 and the second film material F2 in the dividing means 33, and then in the film merging section 43. , the first film material F1 and the second film material F2 join together with the bottom film material F3 disposed between them, and are sent to the heat welding area A.

The film materials F1, F2, and F3 sent to the heat welding area A are separated by the heat sealing mechanism 60 into the heat welding location F1' of the first film material F1 and the heat welding location F2' of the second film material F1. A heat welding process is performed multiple times by sandwiching the film between the front and back sides between heat welding bars 61, and then the film is cut and separated into individual pouches P by a cutting mechanism 70 on the downstream side.
Note that the heat welding locations F1' and F2' shown in FIG. 2 indicate locations to be heat welded by the heat welding bar 61 disposed in the first processing area A-1.

Here, in the present embodiment, in all the heat welding processes that are repeatedly performed, the size of the heat welded location F1' of the first film material F1 and the longitudinal direction of the film (film conveyance direction) in the no-load state is the first Heat welding is performed by sandwiching the heat welding area F2' of the second film material F2, which is larger than the heat welding area F1' of the film material F1, between the heat welding bars 61 in the front and back directions of the film, As a result, as shown in FIG. 7(b), the direction of warping that occurs in the manufactured pouch P is guided in one direction, that is, the pouch P is moved so that the corners of the pouch P are closer to the first film material F1 side. This induces a warping pattern.

To explain the above specifically, first, in this embodiment, the longitudinal dimension of the film in an unloaded state (that is, the state before thermal welding is applied, and no load including tension is applied to the film material) The longitudinal dimension of the film (when the film material is flattened without being covered) is larger at the heat welding location F2' of the second film material F2 than at the heat welding location F1' of the first film material F1. As a means for increasing the size, as shown in FIG. 2, a guide member 80 is provided that pushes the second film material F2 in a direction away from the first film material F1 (downward) on the upstream side of the heat welding area A. It is provided.

As shown in FIG. 2, this guide member 80 is located between the first film material F1 and the second film material F2 on the upstream side of the heat welding area A and the downstream side of the film merging section 43. , is configured to push the second film material F2 downward.
In this way, by pushing downward with the guide member 80, as shown in FIG. By tilting the film closer to the first film material F1 side toward the downstream side of the direction, the lengthwise dimension of the film in an unloaded state is closer to the second film material than the heat welded part F1' of the first film material F1. The heat-welded portion F2' of F2 is made larger.

In addition, in this embodiment, as shown in FIG. (in parallel to the pressing surface 61a).
Further, in this embodiment, in the thermal welding area A, the tension of the first film material F1 and the tension of the second film material F2 are set to be the same or almost the same, but each film material F1, F2 The tension may be set arbitrarily.

Further, in this embodiment, the guide member 80 is configured as a driven roll supported around a horizontal axis that rotates due to contact with the second film material F2, as shown in FIG. The specific aspect of may be any type as long as it pushes the second film material F2 in a direction (downward) away from the first film material F1 on the upstream side of the heat welding area A. For example, the guide member 80 may be configured not as a rotatable roll but as a sliding member that slides the second film material F2 without rotating.
Further, in this embodiment, the guide member 80 is provided so as to be movable in the front and back directions of the film (vertical direction), as shown in FIG. It may be provided as follows.

Further, in the present embodiment, the guide member 80 is adapted to push the second film material F2 downward over the entire width direction of the second film material F2, as shown in FIG. 4, push only the widthwise center (nearby) of the second film material F2 downward, so that at least in the first processing area A-1, the width is wider than the widthwise both sides of the second film material F2. The direction center portion may be in a state away from the first film material F1 (downward).

Further, in the present embodiment, at least in the first processing area A-1, the heat welding location F2' of the second film material F2 is moved closer to the first film material F1 side as it goes downstream in the film transport direction. However, on the contrary, at least in the first processing area A-1, the heat welding point F2' of the second film material F2 is tilted toward the downstream side in the film transport direction. By tilting it away from the F1 side, the longitudinal dimension of the film under no load is greater at the heat welding point F2' of the second film material F2 than at the heat welding point F1' of the first film material F1. It may be made larger.

Although the bottom film material F3 is not shown in FIG. 2, in this embodiment, the guide member 80 is installed so as to push only the second film material F2 downward, that is, the second film material A guide member 80 is installed above the material F2 and below the bottom film material F3. However, in addition to the second film material F2, the guide member 80 may also be installed so as to push the bottom film material F3 downward, that is, the guide member 80 may be installed above the bottom film material F3. You may.

Further, as a method for making the longitudinal dimension of the film in an unloaded state larger at the heat welding point F2' of the second film material F2 than at the heat welding point F1' of the first film material F1, Instead of the method using the guide member 80 described above (or in addition to the method using the guide member 80), in the heat welding area A, the tension of the first film material F1 is made higher than the tension of the second film material F2. By increasing the size (stretching the first film material F1 more than the second film material F2), the lengthwise dimension of the film in the no-load state of the heat welding point F2' of the second film material F2 sandwiched between the heat welding bars 61 may be made larger than the longitudinal dimension of the film in the no-load state of the heat-welded portion F1' of the first film material F1.

Here, as a specific method for making the tension of the first film material F1 larger than the tension of the second film material F2 in the heat welding area A, the following can be considered.

First, the path length of the first transport path R1 is set to be longer than the path length of the second transport path R2 (that is, the sum of the path length of the first transport path R1 and the path length of the combined transport path R3). , is set longer than the sum of the path length of the second conveyance path R2 and the combined path length of the combined conveyance path R3). It may be made larger than the tension.

In addition, here, the longitudinal dimension of the film in the unloaded state of the first film material F1 arranged (sent out) in the section of the first conveyance route R1 and the combined conveyance route R3 is the same as that of the second conveyance route R2 and the combined conveyance route R3. The dimension in the longitudinal direction of the film in the unloaded state of the second film material F2 disposed in the section R3 is approximately the same as that of the first film (more precisely, as described above, the longitudinal dimension of the film in the unloaded state is the same as that of the first film Since the heat welding point F2' of the second film material F2 is made larger than the heat welding point F1' of the material F1, the heat welding point F2' of the second film material F2 is arranged in the section of the second conveyance route R2 and the combined conveyance route R3. The longitudinal dimension of the second film material F2 in an unloaded state is set to be slightly longer than that of the second film material F2.
Moreover, the width direction dimensions (dimensions in the direction orthogonal to the film longitudinal direction) of the film materials F, F1, and F2 are uniform over the film longitudinal direction.

Furthermore, by setting the force (or pressure value) for pushing the first film material F1 by the first dancer roll 41a to be larger than the force (or pressure value) for pushing the second film material F2 by the second dancer roll 42a, In the thermal welding area A, the tension of the first film material F1 may be made larger than the tension of the second film material F2.

Also, the total value (N/m2) of the pressure value (N/m2) that pushes the first film material F1 by each first guide roll 41 (for example, the pressure value for each of n first guide rolls 41 is P1, P2... By setting P1+P2...+Pn) larger than the sum of the pressure values (N/m2) for pressing the second film material F2 by each second guide roll 42, the thermal welding area A In this case, the tension of the first film material F1 may be made larger than the tension of the second film material F2.

Further, the total value of the circumferential length (the length indicated by the symbol L in FIG. 5) of the first film material F1 in contact with the outer circumferential surface of each first guide roll 41 (for example, When the circumferential length of each roll 41 is L1, L2...Ln, L1+L2...+Ln) is the circumferential length at which the second film material F2 contacts the outer peripheral surface of each second guide roll 42. In the heat welding area A, the tension of the first film material F1 may be made larger than the tension of the second film material F2 by setting the number to be larger than the total value.

Also, for each first guide roll 41, the pressure value for pressing the first film material F1 by the first guide roll 41 is multiplied by the circumference length of the first film material F1 in contact with the outer peripheral surface of the first guide roll 41. (For example, let the pressure values of each of the n first guide rolls 41 be P1, P2...Pn, and the circumference length of each of the first guide rolls 41 be L1, L2... ...Ln, P1×L1+P2×L2...+Pn×Ln) is the pressure value for pressing the second film material F2 by the second guide roll 42, and the pressure value applied to the outer peripheral surface of the second guide roll 42 is By setting the value for each second guide roll 42 multiplied by the circumferential length that the two film materials F2 contact to be larger than the total value, the tension of the first film material F1 can be adjusted to The tension may be greater than the tension of the material F2.

Further, the specific method for making the tension of the first film material F1 (the tension applied to the first film material F1) larger than the tension of the second film material F2 (the tension applied to the second film material F2) is as described above. In addition to each method, driving the dancer rolls 41a and 42a (reciprocating swing speed, swing width, drive timing), driving the intermittent feed roll 51 (drive speed and drive timing), and driving the continuous feed roll group 32 (drive By adjusting at least one of the rotational resistance, number, etc. of the guide rolls 41 and 42 that constitute the upper and lower paths of the feed adjustment mechanism 40, the tension of the first film material F1 can be adjusted to that of the second film material. It is conceivable to make the tension larger than the tension of F2.
Further, the tension may be adjusted by arbitrarily combining the methods described above.

In addition, as mentioned above, when the tension of the first film material F1 is made larger than the tension of the second film material F2 in the heat welding area A by adjusting the tension of the film materials F1 and F2, the heat welding area In A, the heat welding points F1' and F2' of the film materials F1 and F2 are in a state where they are not inclined with respect to the film transport direction (a state in which they are parallel to the pressing surface 61a of each heat welding bar 61). ), or (due to the installation method of the guide member 80 described above), or a state tilted with respect to the film transport direction (as the film moves closer to the other film material F1 and F2 as it goes downstream in the film transport direction), or The film may be set in any of the following states (tilted away from the film materials F1 and F2).

Further, as a method for inducing the direction of warpage occurring in the manufactured pouch P in one direction, that is, inducing the warpage mode of the pouch P so that the corners of the pouch P are closer to the first film material F1 side, The following methods may also be considered.
In addition, the method for inducing the warpage of the pouch P so that the corners of the pouch P are closer to the first film material F1 side, which will be described below, is applied to the heat welding location F1' of the first film material F1 described above. This method may be used alone or in combination with various methods for making the heat-welded portion F2' of the second film material F2 larger than the size of the heat-welded portion F2' of the second film material F2.

First, the pressure value for pressing the first film material F1 by each first inner guide roll 41c (for example, if the pressure value for each of n first inner guide rolls 41c is P1, P2...Pn, P1+P2... ...+Pn) is set to be larger than the sum of the pressure values for pressing the first film material F1 by each of the first outer guide rolls 41d, and at the same time, the sum of the pressure values for pushing the first film material F1 by each of the second inner guide rolls 42c is By setting the sum of the pressure values for pressing F2 to be smaller than the sum of the pressure values for pressing the second film material F2 by each of the second outer guide rolls 42d, the corners of the pouch P can be pressed against the first film material. The warping mode of the pouch P may be guided so as to be closer to the F1 side.

Further, the total value of the circumferential length where the first film material F1 contacts the outer circumferential surface of each first inner guide roll 41c (for example, the circumferential length of each of n first inner guide rolls 41c is L1 , L2...Ln), L1+L2...+Ln) is set to be larger than the sum of the circumferential lengths where the first film material F1 contacts the outer peripheral surface of each first outer guide roll 41d. At the same time, the total circumferential length of the second film material F2 in contact with the outer circumferential surface of each second inner guide roll 42c is calculated as By setting the circumferential length that F2 contacts to be smaller than the total value, the warpage of the pouch P may be induced so that the corners of the pouch P are closer to the first film material F1 side.

In addition, the first inner guide is calculated by multiplying the pressure value for pressing the first film material F1 by the first inner guide roll 41c by the circumferential length of the first film material F1 in contact with the outer peripheral surface of the first inner guide roll 41c. The sum of the values for each roll 41c (for example, the pressure value for each of the n first inner guide rolls 41c is P1, P2...Pn, and the circumferential length for each first inner guide roll 41c) are L1, L2...Ln, P1×L1+P2×L2...+Pn×Ln) is the pressure value for pressing the first film material F1 by the first outer guide roll 41d. The value for each first outer guide roll 41d multiplied by the circumferential length of the contact of the first film material F1 with respect to the outer circumferential surface of The sum of the values for each second inner guide roll 42c, obtained by multiplying the pressure value for pressing the material F2 by the circumferential length of the second film material F2 in contact with the outer circumferential surface of the second inner guide roll 42c, is calculated as follows: For each second outer guide roll 42d, the pressure value for pressing the second film material F2 by the second outer guide roll 42d is multiplied by the circumferential length of the contact of the first film material F1 with the outer peripheral surface of the second outer guide roll 42d. By setting the value smaller than the total value, the warp mode of the pouch P may be induced so that the corners of the pouch P are closer to the first film material F1 side.

A pouch manufacturing method according to the second embodiment of the present invention will be described below.
As shown in FIG. 8, in the first processing area A-1, a transport direction welding process is performed using a plurality of upstream heat welding bars 61 extending substantially parallel to the transport direction of the transport path, and a plurality of upstream heat welding bars 61, by pushing the second film material F2 in the direction away from the first film material F1 by the guide member 80, the film width direction dimensions in the no-load state of the first film material F1 and the second film material F2 can be made different. The structure is such that thermal welding is performed in the conveying direction in a state in which the
During the welding process in the transport direction by the upstream heat welding bar 61 in the first processing area A-1, it is possible to make the width direction dimensions of the first film material F1 and the second film material F2 different in the unloaded state. , it is possible to guide the direction of warpage occurring in manufactured pouches in one direction, and to suppress the mixture of manufactured pouches with pouches having different warp directions.

A pouch manufacturing method according to the third embodiment of the present invention will be described below.
As shown in FIG. 9, in the first processing area A-1, a conveyance direction welding process is performed by a plurality of upstream heat welding bars 61 extending substantially parallel to the conveyance direction of the conveyance path. 61, by pushing the first film material F1 and the second film material F2 with the guide member 80, the film width direction dimensions of the first film material F1 and the second film material F2 in the no-load state are made different. The structure is such that thermal welding is performed in the transport direction.
As a result, when the width direction welding process is performed by the downstream heat welding bar 61 in the second processing area A-2, the film width direction dimensions in the no-load state of the first film material F1 and the second film material F2 are different. It is possible to guide the direction of warpage that occurs in manufactured pouches in one direction, and to suppress the mixture of manufactured pouches with pouches that warp in different directions.
In addition, since the guide member of this embodiment does not need to be placed between the first film material F1 and the second film material F2, it is possible to A guide member may be provided between the side heat welding bars 61 to make the longitudinal dimensions different.

A pouch manufacturing method according to the fourth embodiment of the present invention will be described below.
As shown in FIG. 10, in the first processing area A-1, a conveyance direction welding process is performed by a plurality of upstream heat welding bars 61 extending substantially parallel to the conveyance direction of the conveyance path, and a plurality of upstream heat welding bars 61, by pushing the second film material F2 with the guide member 80 so as to be inclined in the width direction of the conveyance path, the longitudinal dimension of the first film material F1 and the second film material F2 in the unloaded state and The structure is such that thermal welding is performed in the conveyance direction while simultaneously changing the widthwise dimensions of the film.
During the transport direction welding process by the upstream heat welding bar 61 in the first processing area A-1, the lengthwise dimension and widthwise dimension of the first film material F1 and the second film material F2 in an unloaded state are simultaneously determined. It is possible to guide the direction of warpage that occurs in manufactured pouches in one direction, and to suppress the mixture of manufactured pouches with pouches that warp in different directions.
Furthermore, the guide member 80 is disposed between the plurality of upstream heat welding bars 61 so as to extend in the conveyance direction, and the second film material F2 is pushed by the guide member 80 so as to be inclined in the conveyance direction of the conveyance path. The first film material F1 and the second film material F2 may be configured to be thermally welded in the transport direction in a state in which the longitudinal dimension and the width direction dimension in an unloaded state are made different at the same time.

In the second to fourth embodiments, the guide member 80 only needs to be present in the width direction of the film, and its dimensions and positional relationship in the transport direction may be arbitrary.
Further, in the second embodiment to the fourth embodiment, the first film material F1 may be pushed in the opposite direction by the guide member 80.
Further, each embodiment has been described with two rows of upstream heat welding bars 61, one pair on each side in the width direction, but three or more rows may be provided, in which case each A guide member 80 may be provided between or upstream of the upstream heat welding bars 61 in the row.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and the pouch manufacturing apparatus 10 and pouches can be manufactured by arbitrarily combining each configuration of the embodiments and modifications described above or below. Various design changes, such as configuring the manufacturing method, can be made without departing from the scope of the present invention as set forth in the claims.

For example, in the embodiment described above, the manufactured pouch P was described as a standing pouch as shown in FIG. Any material may be used as long as F2 is thermally welded, such as a so-called flat pouch without bottom film material F3.

In addition, in the embodiment described above, the film material F before division is divided into the first film material F1 and the second film material F2 in the middle of the conveyance path, but instead of being divided in the middle of the conveyance path, they are separated in advance. The first film material F1 and the second film material F2 formed in the above may be prepared and set in the pouch manufacturing apparatus 10.
Furthermore, in the embodiment described above, the first film material F1 and the second film material F2 have been described as having the same film structure, but the first film material F1 and the second film material F2 have different film structures. For example, the heat shrinkage rate of the first film material F1 may be greater than that of the second film material F2.
Note that the term "same film structure" as used herein means that the basic structure of the film is the same, excluding additional layers such as, for example, a printed layer.

Furthermore, in the above embodiment, the first film material F1 is arranged on the upper side and the second film material F2 is arranged on the lower side in the transport path, but the film materials F1 and F2 in the transport path are The specific positional relationship is not limited to the above, and for example, conversely, the first film material F1 may be placed on the lower side and the second film material F2 may be placed on the upper side.

Further, in the above-described embodiment, the intermittent feed roll 51 was described as being installed on the downstream side of the heat welding area A, but the number and installation location of the intermittent feed roll 51 are not limited to the above. You can install any number of them in any location.

Further, in the above-described embodiment, the thermal welding area A includes a plurality of processing areas A-1 and A-2, but the number of processing areas may be one or three or more. good.

A part or all of the embodiments described above may be described as in the following supplementary notes, but the embodiments are not limited to the following.
(Additional note 1)
In a heat welding area set on the conveyance path, a pouch is formed by performing heat welding treatment on the heat welding parts of the elongated first film material and second film material sent along the conveyance path. A pouch manufacturing method for manufacturing,
In the heat welding process that is repeatedly carried out, the heat weld location of the first film material and at least one of the longitudinal dimension and the width dimension of the film in an unloaded state are the same as the heat weld location of the first film material. A method for manufacturing a pouch, characterized in that heat welding is performed by sandwiching the heat welding portion of the second film material, which is larger than the heat welding portion, between heat welding bars in the front and back directions of the film.
(Additional note 2)
The heat welding area has a processing area where the heat welding process is performed,
The processing area includes a first processing area set at the most upstream side among the processing areas,
In the first processing area, the heat-welded portion of the second film material is inclined toward the first film material side or away from the first film material side as you go downstream in the film transport direction. By this, the lengthwise dimension of the film in the no-load state of the heat-welded part of the second film material sandwiched between the heat-welding bars is equal to the length of the film in the no-load state of the heat-weld part of the first film material. The method for manufacturing a pouch according to Supplementary Note 1, wherein the pouch is made larger than the longitudinal dimension.
(Additional note 3)
By pushing the second film material away from the first film material by a guide member on the upstream side of the heat welding area, the heat welding portion of the second film material is heated in the first processing area. The pouch manufacturing method according to appendix 2, characterized in that the pouch is inclined closer to the first film material as it goes downstream in the film transport direction.
(Additional note 4)
A film merging section is provided on the conveyance path upstream of the heat welding area to merge the first film material and the second film material so as to bring them into contact with each other,
3. The pouch manufacturing method according to appendix 3, wherein the guide member is installed upstream of the heat welding area and downstream of the film merging area.
(Appendix 5)
The pouch manufacturing method according to appendix 3 or 4, wherein the guide member is provided so as to be movable in the front and back directions of the film.
(Appendix 6)
By pushing the second film material by the guide member, in the first processing area, the center part in the width direction of the second film material is closer to the direction away from the first film material than the both sides in the width direction of the second film material. The pouch manufacturing method according to any one of Supplementary notes 3 to 5, characterized in that:
(Appendix 7)
In the heat welding area, by making the tension of the first film material larger than the tension of the second film material, no load is applied to the heat welded portion of the second film material that is sandwiched between the heat welding bars. The pouch production according to any one of Supplementary Notes 1 to 6, wherein the lengthwise dimension of the film in the state is larger than the lengthwise dimension of the film in the no-load state of the heat-welded portion of the first film material. Method.
(Appendix 8)
The conveyance path includes a first conveyance path that conveys the first film material alone, a second conveyance path that conveys the second film material alone, and a downstream path of the first conveyance path and the second conveyance path. a merging conveyance path provided on the side for merging and conveying the first film material and the second film material;
The heat welding area is set on the combined conveyance route,
A plurality of first guide rolls that guide the first film material are installed on the first conveyance path,
The pouch manufacturing method according to any one of Supplementary Notes 1 to 7, wherein a plurality of second guide rolls that guide the second film material are installed on the second conveyance path.
(Appendix 9)
The pouch manufacturing method according to appendix 8, wherein the path length of the first conveyance path is set longer than the path length of the second conveyance path.
(Appendix 10)
The plurality of first guide rolls include a first dancer roll that is reciprocatably provided,
The plurality of second guide rolls include a second dancer roll that is reciprocatably provided,
Pouch production according to appendix 8 or 9, characterized in that the force for pushing the first film material by the first dancer roll is set to be greater than the force for pushing the second film material by the second dancer roll. Method.
(Appendix 11)
A total value of the pressure values pressing the first film material by each of the first guide rolls is set to be larger than a total value of pressure values pressing the second film material by each of the second guide rolls. The pouch manufacturing method according to any one of Supplementary Notes 8 to 10.
(Appendix 12)
The sum of the circumferential lengths where the first film material contacts the outer peripheral surface of each of the first guide rolls is calculated as the circle where the second film material contacts the outer peripheral surface of each of the second guide rolls. The pouch manufacturing method according to any one of Supplementary notes 8 to 11, characterized in that the circumferential length is set larger than the total value.
(Appendix 13)
A value for each first guide roll obtained by multiplying the pressure value for pressing the first film material by the first guide roll by the circumference length of the first film material in contact with the outer peripheral surface of the first guide roll. The second guide is calculated by multiplying the total value by the pressure value for pressing the second film material by the second guide roll by the circumferential length of the second film material in contact with the outer peripheral surface of the second guide roll. The pouch manufacturing method according to any one of Supplementary notes 8 to 12, characterized in that the value for each roll is set larger than the total value.
(Appendix 14)
The conveyance path includes a first conveyance path that conveys the first film material alone, a second conveyance path that conveys the second film material alone, and a downstream path of the first conveyance path and the second conveyance path. a merging conveyance path that is provided on the side and that merges and conveys the first film material and the second film material so that the inner surfaces of the first film material and the second film material face each other,
The heat welding area is set on the combined conveyance route,
A plurality of first guide rolls that guide the first film material are installed on the first conveyance path,
A plurality of second guide rolls that guide the second film material are installed on the second conveyance path,
The plurality of first guide rolls include a plurality of first inner guide rolls installed so as to contact the inner surface of the first film material, and a plurality of first inner guide rolls installed so as to contact the outer surface of the first film material. a plurality of first outer guide rolls;
The plurality of second guide rolls include a plurality of second inner guide rolls installed in contact with an inner surface of the second film material, and a plurality of second inner guide rolls installed in contact with an outer surface of the second film material. The pouch manufacturing method according to any one of Supplementary Notes 1 to 13, further comprising a plurality of second outer guide rolls.
(Appendix 15)
The sum of the pressure values pushing the first film material by each of the first inner guide rolls is set to be larger than the sum of the pressure values pushing the first film material by each of the first outer guide rolls, and ,
A total value of the pressure values pressing the second film material by each of the second inner guide rolls is set to be smaller than a total value of pressure values pressing the second film material by each of the second outer guide rolls. The pouch manufacturing method according to appendix 14, characterized by:
(Appendix 16)
The total circumferential length of the first film material in contact with the outer peripheral surface of each of the first inner guide rolls is the sum of the circumferential lengths of the first film material in contact with the outer peripheral surface of each of the first outer guide rolls. Set the circumference length to be larger than the total value, and
The sum of the circumferential lengths of the second film material in contact with the outer peripheral surface of each of the second inner guide rolls is the sum of the circumferential lengths of the second film material in contact with the outer peripheral surface of each of the second outer guide rolls. The pouch manufacturing method according to appendix 14 or 15, characterized in that the circumferential lengths of the pouches are set smaller than the total value of the circumferences.
(Appendix 17)
For each of the first inner guide rolls, the pressure value for pressing the first film material by the first inner guide rolls is multiplied by the circumferential length of the contact of the first film material with the outer peripheral surface of the first inner guide rolls. The sum of the values is calculated by multiplying the pressure value for pressing the first film material by the first outer guide roll by the circumferential length of the contact of the first film material with the outer peripheral surface of the first outer guide roll. The value for each of the first outer guide rolls is set to be larger than the total value, and
For each second inner guide roll, the pressure value for pressing the second film material by the second inner guide roll is multiplied by the circumference length of the second film material in contact with the outer peripheral surface of the second inner guide roll. The sum of the values is calculated by multiplying the pressure value for pressing the second film material by the second outer guide roll by the circumferential length of the contact of the first film material with the outer peripheral surface of the second outer guide roll. The pouch manufacturing method according to any one of appendices 14 to 17, characterized in that the value for each of the second outer guide rolls is set smaller than the total value.
(Appendix 18)
The pouch manufacturing method according to any one of Supplementary Notes 1 to 17, wherein the first film material has a higher heat shrinkage rate than the second film material.
(Appendix 19)
The heat welding area has a processing area where the heat welding process is performed,
The processing area includes a first processing area set at the most upstream side among the processing areas,
In the first processing area, a transport direction welding process is performed by a plurality of upstream heat welding bars extending substantially parallel to the transport direction of the transport path,
The transport direction welding process is performed by performing heat welding between the plurality of upstream heat welding bars with the first film material and the second film material having different film width direction dimensions in an unloaded state. The pouch manufacturing method according to any one of Supplementary Notes 1 to 18, characterized in that:
(Additional note 20)
By pushing the second film material in a direction away from the first film material by a guide member between the plurality of upstream heat welding bars, the first film material and the second film material are in an unloaded state. The method for manufacturing a pouch according to appendix 19, characterized in that the widthwise dimension of the film is made different.
(Additional note 21)
By pushing both the first film material and the second film material between the plurality of heat welding bars with a guide member, the longitudinal direction of the film in the no-load state of the first film material and the second film material is The pouch manufacturing method according to Supplementary note 1, characterized in that at least one of the dimensions and the widthwise dimension is made different.
(Additional note 22)
Upstream or between the plurality of upstream heat welding bars, by pushing either the first film material or the second film material so as to be inclined in the conveyance direction or the width direction, the first film The pouch manufacturing method according to any one of Supplementary Notes 19 to 20, characterized in that the lengthwise dimension and widthwise dimension of the film material and the second film material in an unloaded state are made different at the same time.
(Additional note 23)
The method for manufacturing a pouch according to any one of Supplementary Notes 1 to 22, wherein the first film material and the second film material have the same film configuration.
(Additional note 24)
In a heat welding area set on the conveyance path, a pouch is formed by performing a heat welding process on the heat welded parts of the elongated first film material and second film material sent along the conveyance path. A pouch manufacturing device for manufacturing,
In the heat welding process that is repeatedly carried out, the heat weld location of the first film material and at least one of the longitudinal dimension and the width dimension of the film in an unloaded state are the same as the heat weld location of the first film material. A pouch manufacturing apparatus characterized in that the pouch manufacturing apparatus is configured to perform heat welding by sandwiching the heat welding part of the second film material, which is larger than the heat welding part, between heat welding bars in the front and back directions of the film.

DESCRIPTION OF SYMBOLS 10... Pouch manufacturing apparatus 20... Film conveyance equipment 30... Continuous feed mechanism 31... Film supply part 32... Continuous feed roll group 33... Dividing means 40... Feed adjustment mechanism 41 ... First guide roll 41a ... First dancer roll 41b ... First tension detection roll 41c ... First inner guide roll 41d ... First outer guide roll 42 ... Each second guide Roll 42a... Second dancer roll 42b... Second tension detection roll 42c... Second inner guide roll 42d... Second outer guide roll 43... Film merging section 43a... Overlapping roll 50... Intermittent feed mechanism 51... Intermittent feed roll 60... Heat seal mechanism 61... Heat welding bar 61a... Pressing surface 62... Cooling bar 70... Cutting mechanism 80... Guide member F... Film material before division F1... First film material F2... Second film material F3... Bottom film material R... Raw roll A... Heat welding area A- 1... First processing area A-2... Second processing area R... Conveyance path R1... First conveyance path R2... Second conveyance path R3... Merging conveyance path R4...・Upstream conveyance path P...Pouch S1...Bottom seal section S2...Side seal section S3...Planned top seal area

Claims (20)

In a heat welding area set on the conveyance path, a pouch is formed by performing heat welding treatment on the heat welding parts of the elongated first film material and second film material sent along the conveyance path. A pouch manufacturing method for manufacturing,
In the heat welding process that is repeatedly carried out, the heat weld location of the first film material and at least one of the longitudinal dimension and the width dimension of the film in an unloaded state are the same as the heat weld location of the first film material. A method for manufacturing a pouch, characterized in that heat welding is performed by sandwiching the heat welding portion of the second film material, which is larger than the heat welding portion, between heat welding bars in the front and back directions of the film. The heat welding area has a processing area where the heat welding process is performed,
The processing area includes a first processing area set at the most upstream side among the processing areas,
In the first processing area, the heat-welded portion of the second film material is inclined toward the first film material side or away from the first film material side as you go downstream in the film transport direction. By this, the lengthwise dimension of the film in the no-load state of the heat-welded part of the second film material sandwiched between the heat-welding bars is equal to the length of the film in the no-load state of the heat-weld part of the first film material. The method for manufacturing a pouch according to claim 1, wherein the pouch is made larger than the longitudinal dimension. By pushing the second film material away from the first film material by a guide member on the upstream side of the heat welding area, the heat welding portion of the second film material is heated in the first processing area. 3. The method for manufacturing a pouch according to claim 2, wherein the pouch is inclined closer to the first film material as it goes downstream in the film transport direction. A film merging section is provided on the conveyance path upstream of the heat welding area to merge the first film material and the second film material so as to bring them into contact with each other,
4. The pouch manufacturing method according to claim 3, wherein the guide member is installed upstream of the heat welding area and downstream of the film merging area. 4. The pouch manufacturing method according to claim 3, wherein the guide member is provided so as to be movable in the front and back directions of the film. By pushing the second film material by the guide member, in the first processing area, the center part in the width direction of the second film material is closer to the direction away from the first film material than the both sides in the width direction of the second film material. The pouch manufacturing method according to claim 3, characterized in that: In the heat welding area, by making the tension of the first film material larger than the tension of the second film material, no load is applied to the heat welded portion of the second film material that is sandwiched between the heat welding bars. 2. The pouch manufacturing method according to claim 1, wherein the longitudinal dimension of the film in this state is made larger than the longitudinal dimension of the film in an unloaded state of the heat-welded portion of the first film material. The conveyance path includes a first conveyance path that conveys the first film material alone, a second conveyance path that conveys the second film material alone, and a downstream path of the first conveyance path and the second conveyance path. a merging conveyance path provided on the side for merging and conveying the first film material and the second film material;
The heat welding area is set on the combined conveyance route,
A plurality of first guide rolls that guide the first film material are installed on the first conveyance path,
8. The pouch manufacturing method according to claim 7, wherein a plurality of second guide rolls for guiding the second film material are installed on the second conveyance path. The pouch manufacturing method according to claim 8, wherein the path length of the first conveyance path is set longer than the path length of the second conveyance path. The plurality of first guide rolls include a first dancer roll that is reciprocably provided,
The plurality of second guide rolls include a second dancer roll that is reciprocably provided,
9. The pouch manufacturing method according to claim 8, wherein the force for pushing the first film material by the first dancer roll is set to be larger than the force for pushing the second film material by the second dancer roll. A total value of the pressure values pressing the first film material by each of the first guide rolls is set to be larger than a total value of pressure values pressing the second film material by each of the second guide rolls. The pouch manufacturing method according to claim 8. The sum of the circumferential lengths where the first film material contacts the outer peripheral surface of each of the first guide rolls is calculated as the circle where the second film material contacts the outer peripheral surface of each of the second guide rolls. 9. The pouch manufacturing method according to claim 8, wherein the circumferential length is set to be larger than a total value. A value for each first guide roll obtained by multiplying the pressure value for pressing the first film material by the first guide roll by the circumference length of the first film material in contact with the outer peripheral surface of the first guide roll. The second guide is calculated by multiplying the total value by the pressure value for pressing the second film material by the second guide roll by the circumferential length of the second film material in contact with the outer peripheral surface of the second guide roll. 9. The pouch manufacturing method according to claim 8, wherein the value for each roll is set larger than the total value. 2. The pouch manufacturing method according to claim 1, wherein the first film material has a higher heat shrinkage rate than the second film material. The heat welding area has a processing area where the heat welding process is performed,
The processing area includes a first processing area set at the most upstream side among the processing areas,
In the first processing area, a transport direction welding process is performed by a plurality of upstream heat welding bars extending substantially parallel to the transport direction of the transport path,
The conveyance direction welding process is performed by performing heat welding between the plurality of upstream heat welding bars with the first film material and the second film material having different film width direction dimensions in an unloaded state. The pouch manufacturing method according to claim 1, characterized in that: By pushing the second film material in a direction away from the first film material by a guide member between the plurality of upstream heat welding bars, the first film material and the second film material are in an unloaded state. 16. The method for manufacturing a pouch according to claim 15, wherein the widthwise dimensions of the film are made different. By pushing both the first film material and the second film material between the plurality of heat welding bars by a guide member, the longitudinal direction of the film in the no-load state of the first film material and the second film material is The method for manufacturing a pouch according to claim 1, characterized in that at least one of dimensions and width direction dimensions is made different. Upstream of or between the plurality of upstream heat welding bars, the first film material is pressed by a guide member so that either the first film material or the second film material is inclined in the conveyance direction or the width direction. 16. The method for manufacturing a pouch according to claim 15, wherein the lengthwise dimension and widthwise dimension of the film material and the second film material in an unloaded state are made different at the same time. The pouch manufacturing method according to any one of claims 1 to 18, wherein the first film material and the second film material have the same film configuration. In a heat welding area set on the conveyance path, a pouch is formed by performing heat welding treatment on the heat welding parts of the elongated first film material and second film material sent along the conveyance path. A pouch manufacturing device for manufacturing,
In the heat welding process that is repeatedly carried out, the heat weld location of the first film material and at least one of the longitudinal dimension and the width dimension of the film in an unloaded state are the same as the heat weld location of the first film material. A pouch manufacturing apparatus characterized in that the pouch manufacturing apparatus is configured to perform heat welding by sandwiching the heat welding part of the second film material, which is larger than the heat welding part, between heat welding bars in the front and back directions of the film.

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