JP2013244619A - Method of manufacturing pouch container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing a pouch container, which has superior self-standing stability and shape retainability, is reducible in capacity, secures sufficient liquid-tight properties between a body part and a bottom part, and facilitates automation of a bag manufacturing operation.SOLUTION: There is provided a method of manufacturing a pouch container 1 that includes a body part molding process and a bottom part fitting process. The bottom part fitting process includes the processes of: loading a body part 2C in a tubular bottom part fitting tool 30 upside down in a spread state; forming a joint part 2a comprising an endless annular folding-back part at the body part 2C on an upper side of the bottom part fitting tool 30 by folding a tubular lower part 2g, projecting upward from the bottom part fitting tool 30, of the body part 2C, back externally so that the inside and outside are turned over; forming an annular lower joint part 4a which projects sideward at a lower end part of a container body 4 by fusing a bottom part molding film 3B to the joint part 2a of the body part 2C; and cutting away the lower part 2g of the body part 2C and an unnecessary part of the bottom part molding film 3B except the lower joint part 4a.

Description

  The present invention relates to a method for manufacturing a pouch container that can be folded and reduced in volume.

  In general, a foldable pouch container made of a soft film is used as a refill container for storing liquid substances such as shampoos, rinses, hand soaps, etc., or as a container for storing gel foods such as jelly. Is widely put into practical use (for example, see Patent Document 1).

  By the way, as the above-mentioned pouch container, a self-supporting one that is filled with the contents has been put into practical use, but since the container body is composed of a soft film, basically, the contents can be reduced. Along with this, there is a problem that the container body is deformed into a flat shape, the self-supporting stability is lowered, and the appearance is lowered. Also, because the shape retention is not so good, the contents may overflow when held by hand, and if it is a liquid for refilling, it can be used because it only transfers the contents at once. It has been difficult to use as a container for filling beverages.

  In addition, as a container made of a film material, a plurality of mountain fold lines are formed in the longitudinal direction in the trunk portion toward the outside, and a bottom portion made of another member is joined to the lower end opening of the trunk portion, Containers with improved shape retention and self-supporting stability have also been proposed (see, for example, Patent Document 2). However, since the container described in Patent Document 2 does not have a gusset, there is a problem that it is difficult to reduce the volume by folding the container after the contents are used.

International Publication No. 2008/096392 JP 2011-168306 A

  Therefore, the present applicant has intensively studied the configuration of a pouch container that is excellent in self-supporting stability and shape retention and can be folded to reduce the volume. As a result, a substantially cylindrical body portion having a gusset and a bottom portion for closing the lower surface opening of the body portion are formed, and a joint portion formed by bending outward is formed at the lower end portion of the body portion, and the joint portion The outer peripheral part of the bottom part is fused to the lower surface of the pouch, and the annular lower joint part formed by fusing two films to the lower end part of the pouch container is formed to project outward, so that the pouch container is gusseted. A foldable pouch container has been developed. In this pouch container, it is possible to reduce the volume of the pouch container by folding the trunk part with the gusset, and furthermore, the gusset forms a plurality of mountain fold corners extending in the height direction with respect to the trunk part. Improve shape retention and self-supporting stability, and when installing a pouch container, install almost the entire bottom and install a bowl-shaped lower joint that protrudes outward from the lower end of the pouch container. Thus, the self-supporting stability of the pouch container can be enhanced.

  However, since this pouch container is manufactured by fusing the bottom part to the trunk part after producing the trunk part, the conventional manufacturing method as described in Patent Document 1 cannot be adopted as it is, Further, since it has a gusset, it cannot be manufactured even by the manufacturing method described in Patent Document 2, and it is necessary to develop a completely new manufacturing method. Therefore, in the production method of the prototype, a cut was made in the vertical direction at the lower end portion of the corner portion of the trunk portion, and the lower end portion of each side surface of the trunk portion was bent outward to form a joint portion. In this method, it is difficult to automate the bag making operation, and the area of the fused portion between the corner portion and the bottom portion of the body portion is reduced, and the portion is inevitably weakened.

  An object of the present invention is a pouch container that is excellent in self-supporting stability and shape retention, can be reduced in volume, and can sufficiently secure liquid tightness between the body and the bottom, and can easily automate bag making operations. It is to provide a manufacturing method.

  The method for producing a pouch container according to the present invention uses a multilayer molding film and a bottom molding film having at least a base material layer and a sealant layer, and a single or a plurality of trunk molding films. A body forming step in which the body part of the container body is formed and the bottom molding film is fused to the lower end part of the body part with the sealant layer on the body side. And a bottom mounting step for forming the bottom of the container main body to close the lower end opening of the container in a liquid-tight manner, wherein the bottom mounting step is provided in a cylindrical bottom mounting jig. A loading step of loading the body portion in an unfolded state, and a cylindrical lower portion of the body portion protruding outward from one end portion of the bottom portion mounting jig, centering on one end edge of the bottom portion mounting jig Folded outward so that the inside and outside are reversed, for the bottom mounting A folding step of forming a joining portion consisting of an endless annular folding portion on the barrel portion at one end side of the tool, and a bottom forming film is fused to the joining portion of the barrel portion, and laterally to the lower end portion of the container body A fusion process for forming a projecting annular lower joint part, and a trimming process for cutting off a lower part of the body part and an unnecessary part of the bottom molding film while leaving the lower joint part.

  In this manufacturing method, the cylindrical lower portion of the body portion loaded in the bottom mounting jig is folded outward so that the inside and outside of the bottom mounting jig are reversed, and the bottom mounting jig Since one end side of the body is formed with a joint portion consisting of an endless annular folded portion on the body portion, the lower end portion of the corner portion of the body portion is cut in the vertical direction as in the method of manufacturing the prototype described above, Compared to the case where the lower end portion of each side surface of the portion is bent outward to form the joint portion, the joint portion can be efficiently formed at the lower end portion of the body portion. In addition, the body folding process can be automated relatively easily, and the loading process, fusing process, and trimming process can be automated relatively easily, so the entire bottom mounting process can be automated. It becomes. Furthermore, since the width of the joint portion of the body portion is a size corresponding to the width of one end face of the bottom mounting jig, the lower joint formed by fusion-bonding the joint portion of the body portion and the outer peripheral portion of the bottom portion. The width of the portion can be sufficiently ensured over the entire circumference, and a decrease in bonding strength and a decrease in liquid-tightness due to a partial decrease in the fusion area can be prevented. Moreover, since the body and bottom of the pouch container manufactured by this manufacturing method are composed of a film, after use of the contents, the body and bottom are crushed flat to reduce the volume of the pouch container. It becomes possible. In addition, the lower end of the container body is formed by fusing the joint portion of the trunk portion and the outer peripheral portion of the bottom portion, and an annular lower joint portion that is harder than the trunk portion and the bottom portion is formed to protrude outward. Moreover, since the bottom part and the lower joint part are arranged in substantially the same plane, when installing the pouch container, the pouch container can be installed by bringing the entire bottom part and the lower joint part into contact with the installation surface. Stability and shape retention can be improved.

  Here, it is a preferred embodiment that the thickness of the sealant layer of the body forming film and the bottom forming film is set to 10 to 200 μm. As described above, when the lower portion of the body portion is folded using the bottom mounting jig, wrinkles are inevitably generated at the folded portion. Therefore, by appropriately setting the thickness of the sealant layer as in the present invention, even when wrinkles occur in the folded portion of the trunk, the wrinkles are filled with a melted sealant layer, This is preferable because liquid tightness with the outer peripheral portion of the bottom portion can be sufficiently secured.

  In the trimming step, it is also a preferred embodiment that the width of the lower joint portion is set to 1 to 10 mm. That is, when the width of the lower joint portion is less than 1 mm, the joint strength of the lower joint portion cannot be sufficiently ensured, and when it exceeds 10 mm, workability when folding the lower portion of the body portion is lowered, and the pouch Since the external appearance of the container is lowered, it is preferable to set it to 1 to 10 mm.

  In the fusing step, it is also a preferred embodiment that a seal portion formed of an annular protrusion over the entire circumference of the lower joint portion is formed by fusion at a middle portion in the width direction of the lower joint portion. In this case, the sealing performance between the joint portion of the trunk portion and the outer peripheral portion of the bottom portion can be further improved by the seal portion. Specifically, the lower joint portion is formed by sandwiching the joint portion of the body portion and the outer peripheral portion of the bottom portion between the heating surfaces of a pair of heating dies, and heat-sealing them. An annular fitting groove is formed in the middle in the width direction of the annular heating surface of one heating mold, and an uneven fitting is fitted in the fitting groove in the middle in the width direction of the annular heating surface of the other heating mold. Using an annular fitting protrusion, when the lower joint is heat-sealed by sandwiching the joint of the body and the outer periphery of the bottom between both heating molds, it fits into the fitting groove By forming the seal portion with the protrusion, the sealing performance between the joint portion of the trunk portion and the outer peripheral portion of the bottom portion can be further improved.

  A band-shaped bottom molding film is fed onto one end of the bottom mounting jig over the fusion process and the trimming process, and in the fusion process, the bottom molding film is fused to the folded portion of the barrel. After trimming, when trimming the unnecessary part in the trimming process, part of the fused part is trimmed so that it remains on the unwanted part side, and the unnecessary part at the lower end of the body part is unnecessary for the bottom molding film. It is a preferred embodiment to discharge with the part. By comprising in this way, it becomes possible to discharge | emit the unnecessary part of the film for bottom part shaping | molding, and the unnecessary part of the lower end part of a trunk | drum to the outside of a line easily.

  It is a preferred embodiment that a filling step for filling the body portion with the contents is provided between the folding step and the fusion step. In this case, since the contents can be filled from the lower end opening of the body portion having a large opening area, it is possible to employ a large discharge nozzle for filling the contents, and the filling time of the contents can be reduced. Can be greatly shortened.

  According to the method for manufacturing a pouch container according to the present invention, the cylindrical lower portion of the trunk portion loaded in the bottom mounting jig is moved outward so that the inside and outside of the bottom mounting jig are inverted. Folded to form a joint consisting of an endless annular folded portion on the barrel at one end of the bottom mounting jig, so that the lower end of the corner of the barrel is It is possible to efficiently form the joint portion at the lower end portion of the trunk portion as compared to the case where the joint portion is formed by cutting in the direction and bending the lower end portion of each side surface of the trunk portion outward. Become. In addition, the body folding process can be automated relatively easily, and the loading process, fusing process, and trimming process can be automated relatively easily, so the entire bottom mounting process can be automated. It becomes. Furthermore, since the width of the joint portion of the body portion is a size corresponding to the width of one end face of the bottom mounting jig, the lower joint formed by fusion-bonding the joint portion of the body portion and the outer peripheral portion of the bottom portion. The width of the portion can be sufficiently ensured over the entire circumference, and a decrease in bonding strength and a decrease in liquid-tightness due to a partial decrease in the fusion area can be prevented. Moreover, since the body and bottom of the pouch container manufactured by this manufacturing method are composed of a film, after use of the contents, the body and bottom are crushed flat to reduce the volume of the pouch container. It becomes possible. In addition, the lower end of the container body is formed by fusing the joint portion of the trunk portion and the outer peripheral portion of the bottom portion, and an annular lower joint portion that is harder than the trunk portion and the bottom portion is formed to protrude outward. Moreover, since the bottom part and the lower joint part are arranged in substantially the same plane, when installing the pouch container, the pouch container can be installed by bringing the entire bottom part and the lower joint part into contact with the installation surface. Stability and shape retention can be improved.

Perspective view of pouch container II-II sectional view of FIG. III-III sectional view of FIG. Cross section of the torso in the folded state Perspective view of the pouch container in the folded state FIG. 2 equivalent view of a pouch container of another configuration Front view of the trunk in the folded state before the bottom and spout are attached Outline diagram of the production line Explanatory drawing of trimming method of spout mounting hole Explanatory drawing of spout mounting method (A)-(e) is explanatory drawing of the bottom part attachment method.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<< Pouch container >>
First, the configuration of the pouch container 1 will be described.
As shown in FIGS. 1 to 5, the pouch container 1 includes a container body 4 made of a flexible film having a cylindrical body portion 2 and a bottom portion 3 that closes a lower end opening of the body portion 2. The spout 5 is fused and fixed to the upper end, and after use of the contents, the body 2 and the bottom 3 can be folded to reduce the volume as shown in FIG.

  The body film 2A constituting the body portion 2 and the bottom film 3A constituting the bottom portion 3 are each composed of a soft film, and the soft film is melted on one outer surface side by heat sealing, ultrasonic sealing or the like. A sealant layer made of a thermoplastic synthetic resin material such as polyolefin resin is provided, and a base material layer made of a synthetic resin material excellent in abrasion resistance that cannot be fused to each other is provided on the other outer surface side. Further, it is composed of a laminate film having at least a two-layer structure. However, it is a laminate film of three or more layers in which functional layers having functions such as gas barrier properties and light shielding properties are provided between the sealant layer and the base material layer in accordance with the contents contained in the pouch container 1, for example. It is also possible to configure. Moreover, the trunk | drum 2 and the bottom part 3 can also be comprised with the soft film which consists of the same raw material, and can also be comprised with the soft film which consists of a different raw material.

  The trunk | drum 2 is formed in the hexagonal cylinder shape which carried out the diameter reduction of the upper part moderately. The body 2 is composed of two front and rear body films 2A, and the two body films 2A are overlapped in the front and back with the sealant layer side inward to heat the sides of both body films 2A. It is formed into a cylindrical shape by joining with a seal or an ultrasonic seal, and side joint portions 2b formed by joining the front and rear body film 2A to both sides of the body portion 2 are outward over the entire length in the height direction. It is formed to protrude to the side. A flat first side surface portion 2c is formed at the center portion in the width direction of the front and rear body film 2A, and the second side surface portion 2d disposed on both sides of the first side surface portion 2c is shown in FIG. Gussets 6 capable of changing the posture between the unfolded state and the folded state shown in FIG. 4 are formed over the entire length in the height direction. In order to form the gusset 6, a mountain fold line 6a protruding outward is formed at the boundary between the first side surface portion 2c and the second side surface portion 2d over the entire length in the height direction, and the second side surface portion 2d. A valley fold line 6b that protrudes inward is formed in the middle in the middle in the width direction over the entire length in the height direction. The body 2 is folded into a flat plate shape shown in FIGS. 4 and 5 from the unfolded state shown in FIG. 3 by folding the second side surface 2d along the valley fold line 6b to the inside of the body 2. It is configured so that it can be easily folded by hand.

  In order to gradually reduce the diameter of the upper part of the body film 2A, the upper part of the side joint part 2b is formed to be inclined toward the spout 5 side, and the upper part of the body film 2A is inclined to the mountain fold line 6a. The upper joint portion 2e is formed.

  The bottom 3 is composed of a hexagonal bottom film 3A that fits the lower end of the unfolded body 2 and is attached to the lower end of the body 2 so as to close the lower end opening of the body 2. When folding the trunk 2, fold lines are formed diagonally or radially so that the bottom 3 can be easily folded, corresponding to the mountain fold lines 6 a and valley fold lines 6 b of the trunk 2 with respect to the bottom 3. You can also

  The attachment structure of the bottom part 3 to the lower end part of the trunk part 2 will be described. The lower end part of the trunk part 2 is provided with an endless annular hook-like joint part 2a that protrudes outward by being bent outward. The bottom part 3 is below the part 2, the sealant layer is on the body part 2 side, and the outer peripheral part is sealed to the lower surface of the joint part 2 a so as to close the lower end opening of the body part 2. It is attached by joining by.

  An endless annular thick lower joint portion 4a formed by fusing the joint portion 2a of the body portion 2 and the outer peripheral portion of the bottom portion 3 is provided on the lower end portion of the container body 4 so as to protrude outwardly. The part 4a and the bottom part 3 are arranged in a substantially horizontal and same plane, and the container body 4 is configured to be able to stand upright in a vertical direction by installing the lower joint part 4a and the bottom part 3 on the installation surface. In addition, as shown in FIG. 6, the lower joint part 4a is formed in an inclined surface shape in which the outer peripheral side is disposed slightly below the horizontal surface, and the bottom part 3 is formed in a curved surface shape whose central part side protrudes upward. It can also be formed. In the container body 4, in a state where the contents are not filled, the lower joint portion 4 a can be self-supported in the vertical direction by being installed on the installation surface, and when the contents are filled, the bottom portion 3 bulges downward, The substantially entire surface excluding the outer peripheral portion of the bottom portion 3 and the outer peripheral portion of the lower joint portion 4a are installed on the installation surface, so that they can stand upright in the vertical direction. Moreover, since the center part of the bottom part 3 curves downward and the inner edge of the lower joint part 4a is disposed at a position away from the installation surface in a state where the contents are filled, the space between the body part 2 and the bottom part 3 It is possible to effectively prevent a problem that the inner edge of the lower joint 4a that contributes most to the liquid tightness is damaged by contact with the installation surface.

  The thickness of the sealant layer of the soft film constituting the body part 2 and the bottom part 3 is 10 to 10 so that the bonding between the joint part 2a of the body part 2 and the outer peripheral part of the bottom part 3 can be reliably performed without a seal failure. It is set to 200 μm. In addition, when the width of the lower joint portion 4a is less than 1 mm, the joint strength of the lower joint portion 4a cannot be sufficiently secured, and when it exceeds 10 mm, workability when the lower portion 2g of the trunk portion 2 is folded back is lowered. In addition, since the appearance of the pouch container 1 is lowered, it is set to 1 to 10 mm.

  In the middle of the lower joint 4a in the width direction, a seal portion 4b formed of an annular protrusion over the entire circumference of the lower joint 4a is formed. The lower joint portion 4a is formed by sandwiching the joint portion 2a of the body portion 2 and the outer peripheral portion of the bottom portion 3 between a pair of heating dies, and heat-sealing both sealant layers. As a pair of heating dies, an annular fitting groove is formed in the middle in the width direction of the annular heating surface of one heating die, and fitted in the middle in the width direction of the annular heating surface of the other heating die. It is formed by sandwiching the outer peripheral part of the joint part 2a and the bottom part 3 between both heating dies by using an annular fitting protrusion that is unevenly fitted into the groove, and heat-sealing both. The A plurality of seal portions 4b can be formed.

  In this container main body 4, the bottom 3 is configured as a flat surface, and an annular lower joint 4a is projected outward from the body 2 so that substantially the entire surface of the bottom 3 and the lower joint 4a are brought into contact with the installation surface. Since the container body 4 can be installed, the container body 4 in the unfolded state can be installed with good stability. In addition, the pair of side joints 2b formed on the body portion 2 functions as reinforcing ribs of the body portion 2, and the four mountain fold lines 6a of the gusset 6 function as reinforcing portions. The shape retention is improved, and the container body 4 can be installed in a stable manner in a deployed state, and the deformation of the container body 4 while being held by hand can be suppressed.

  The spout 5 includes a cylindrical portion 5a for discharging contents, a flange portion 5b provided integrally with a lower end portion of the cylindrical portion 5a, and a lid 5c that is detachably screwed to the upper end portion of the cylindrical portion 5a. It has. When the spout 5 is attached to the container body 4, the spout 5 is inserted inside the trunk portion 2 before the bottom portion 3 is attached to the trunk portion 2 of the container body 4, as will be described later. The cylindrical portion 5a is inserted into the spout mounting hole 2f at the upper end of the portion 2, and the lower surface side of the peripheral portion of the spout mounting hole 2f is fused to the upper surface of the flange portion 5b by heat sealing, ultrasonic sealing, or the like. It is attached to the main body 4 in a liquid-tight manner. The spout 5 is made of a resin (for example, a thermoplastic resin such as high-density polyethylene) that enables fusion with the body 2.

  As shown in FIG. 10, one or more annular protrusions 5d are formed concentrically with the cylindrical portion 5a on the upper surface of the flange portion 5b before being fused to the body portion 2, and are formed on the upper surface of the flange portion 5b. When the body 2 is fused, the annular protrusion 5d is melted and fused to the body 2 so that a seal failure between the upper surface of the flange 5b and the body 2 can be prevented. Yes. In addition, as the spout 5, it is also possible to employ a spout having a known configuration having a shape other than that shown in FIGS. For example, a so-called boat shape having a mounting portion with a constant height as the center portion is widest in plan view and tapered toward the both sides in the longitudinal direction, and a mouth portion provided in a protruding shape at the center portion of the mounting portion It is also possible to employ a spout or a spout having a mounting portion having a rhombus or cross shape in plan view. For example, when using a boat-shaped spout, use a circular or elliptical cylindrical trunk as the trunk, overlap the upper end of the trunk, and attach the boat-shaped spout mounting part to the center in the width direction. The boat-shaped spout is attached to the trunk portion by arranging and fusing both sides of the upper end portion of the trunk portion and the central portion of the upper end portion of the trunk portion and the peripheral surface of the mounting portion of the boat-shaped spout.

  In addition, this invention is the attachment structure of the bottom part 3 with respect to the lower end part of the trunk | drum 2, ie, the endless annular hook-shaped junction part which protrudes outward by bending outside at the lower end part of the cylindrical trunk | drum 2. 2a, with the bottom 3 on the lower side of the body 2 and the sealant layer on the side of the body 2 so that the lower end opening of the body 2 is closed. It has a feature in that it is joined by an ultrasonic seal or the like, and any other configuration can be adopted. Specifically, the body 2 has a hexagonal cross section, but has a polygonal shape such as a pentagonal shape or a quadrangular shape, or a cross sectional shape such as a circular shape, an elliptical shape, a flat circular shape, or a streamline shape. Can also be adopted. In addition, the body 2 was formed into a cylindrical shape by superimposing the two body films 2A and fusing the side portions thereof. However, the body film 2 was rolled into a cylindrical shape and melted at both ends. It is also possible to adopt a barrel portion that is configured by wearing, or that is formed into a cylindrical shape by joining three or more barrel portion films. Although the side part which protruded outside from the gusset 6 of the trunk | drum film 2A was melt | fused in parallel linear form, it extended over the side part which protruded outward from the gusset 6 of the trunk | drum film 2A, and the formation position of a gusset 6, or 6 only in the formation position, the side part of the body film 2A is linear, parallel to the length direction of the body film 2A, linearly inclined with respect to the length direction, curved, It is also possible to fuse them in the form of a line formed by combining them. For example, the side part of the body film 2A is fused in a parallel straight line at the position where the gusset 6 is formed, or the side part of the body film 2A is fused in a straight line which is not curved or parallel at the position where the gusset 6 is formed. It is also possible to do. In the case where the body film 2A is fused in a curved shape at the position where the gusset 6 is formed, for example, the central portion, the upper portion and the lower portion in the height direction of the body portion can be formed into a constricted shape or a bulged shape. When the body film 2A is fused in a straight line that is not parallel at the formation position, that is, wider or narrower as it goes upward, the body part can be configured in a truncated cone shape or a truncated pyramid shape, and has a pouch container. It can be configured easily, the self-supporting stability of the pouch container can be increased, the functionality of the pouch container can be increased, and the design of the pouch container can be increased. Furthermore, although four gussets 6 are provided for the body portion 2, the number of gussets 6 can be arbitrarily set or omitted. Further, in the present embodiment, the present invention is applied to the pouch container 1 provided with the spout 5, but the present invention can also be applied to a pouch container not provided with the spout 5.

<< Method for Manufacturing Pouch Container >>
Next, a method for manufacturing the pouch container 1 will be described.
The method for manufacturing the pouch container 1 includes a trunk portion forming step, an attachment hole trimming step, a spout attachment step, and a bottom portion attachment step. In the body part forming step, the body part 2C having the structure as shown in FIG. 7 is formed using the two body part forming films 2B. In the attaching hole trimming step, the spout attaching step, and the bottom part attaching step, FIG. The trimming of the spout attachment hole 2f of the trunk portion 2C and the spout 5 with respect to the trunk portion 2C are carried out while the trunk portion 2C molded in the trunk portion molding step is conveyed in a developed state along the production line 10 as shown in FIG. The pouch container 1 is manufactured by sequentially performing attachment and attachment of the bottom 3 to the lower end of the body 2C. However, when the spout 5 is not provided, the mounting hole trimming step and the spout mounting step are omitted. In addition, this body part 2C is formed by connecting the lower part 2g folded back when the bottom part 3 is fused to the lower end part of the trunk part 2 before the spout 5 and the bottom part 3 are fused.

<Body forming process>
In the trunk portion forming step, as shown in FIGS. 4 and 7, a pair of gussets 6 are folded inward in the width direction of the two barrel portion forming films 2 </ b> B, and the base material layer side is folded inward. The two gussets formed with the gusset 6 are formed along the length direction so that the mountain fold side of the gusset 6 is arranged outside in the width direction and the valley fold side is arranged inside in the width direction. The film 2B is superposed with the sealant layer side inward so that the gusset 6 is disposed on the outside, the both sides in the width direction of the body forming film 2B are fused, cooled, and unnecessary portions are removed. The body part 2C in a folded state is formed by cutting and as shown by a solid line in FIG. However, as the body 2, any structure can be adopted as long as it has a cylindrical shape, such as the one not having the gusset 6 as described above, or a polygonal shape other than a hexagon or a cylindrical shape. In the part forming step, the body part 2 </ b> C can be formed by an arbitrary forming method according to the configuration of the body part 2.

<Mounting hole trimming process>
In the mounting hole trimming process, as shown in FIGS. 8 and 9, a mounting hole trimming jig 11 having a dimension that can be fitted into the unfolded body portion 2 </ b> C without a substantial gap is used. Are installed on the outer peripheral portion of the turntable 12 at intervals in the circumferential direction, and the spout attachment hole 2 f is trimmed while the attachment hole trimming jig 11 is rotated together with the turntable 12. Specifically, first, the unfolded body portion 2 </ b> C is set in the mounting hole trimming jig 11 in the vertical orientation with a substantially gap-free fit. Next, the body portion 2 </ b> C is brought into close contact with the mounting hole trimming jig 11, and the body portion 2 </ b> C is adjusted to an appropriate position of the mounting hole trimming jig 11. Next, the spout mounting hole 2f is trimmed by pressing the lower surface of the die plate 14 against the blade 13a of the cutting plate 13 provided at the upper end of the mounting hole trimming jig 11 and punching the upper end of the body 2C. Will do. In addition, when the space | interval of the valley crease line 6b of the right and left gusset 6 is larger than the diameter of the spout attachment hole 2f, this attachment hole trimming process can be skipped. However, since the shape of the spout mounting hole 2f in the unfolded state of the trunk portion 2C is likely to vary, it is preferable to provide this mounting hole trimming step to accurately form the shape of the spout mounting hole 2f in the unfolded state. .

<Spout mounting process>
In the spout mounting step, as shown in FIGS. 8 and 10, a spout mounting jig 20 having a size that can be fitted into the unfolded body 2 </ b> C without a substantial gap is used, and the spout mounting jig 20 is used as a rotary table. The spout 5 is attached to the body portion 2 </ b> C while being installed on the outer peripheral portion of the 21 at intervals in the circumferential direction and rotating the spout attachment jig 20 together with the rotary table 21. Specifically, first, the spout 5 supplied from the spout feeder 22 is externally fitted to a positioning pin 23 that is formed to protrude from the upper end portion of the spout attachment jig 20, and is attached to the upper end portion of the spout attachment jig 20. Position and set spout 5. Next, the body portion 2C obtained by trimming the spout mounting hole 2f in the mounting hole trimming step is externally fitted to the spout mounting jig 20 so that the cylindrical portion 5a and the lid 5c of the spout 5 are inserted into the spout mounting hole 2f. Position and set to the shape. Next, the flange portion 5b of the spout 5 and the peripheral portion of the spout attachment hole 2f are sandwiched between the annular heating portion 24a of the heating plate 24 and the upper end surface of the spout attachment jig 20, and the two are heat-sealed. The spout 5 is attached to the body 2C by fusing with an ultrasonic seal or the like.

<Bottom mounting process>
As shown in FIGS. 8 and 11, the bottom mounting step includes a loading step, a folding step, a filling step, a fusing step, and a trimming step. While using the cylindrical bottom mounting jig 30 and transporting the bottom mounting jig 30 along the conveyor 31, in the loading process, the body 2 </ b> C having the spout 5 mounted in the bottom mounting jig 30 is attached. In an unfolded state, it is loaded in an inverted state, and in the folding process, the cylindrical lower part 2g of the barrel part 2C is folded outward, and in the filling process, the contents are filled into the barrel part 2C. The bottom molding film 3B is fused to the joint portion 2a, and in the trimming step, the lower portion 2g of the body portion 2C and the unnecessary portion of the bottom molding film 3B are trimmed leaving the lower joint portion 4a to obtain the pouch container 1. It will be.

  First, in the loading process, as shown in FIGS. 8 and 11 (a), the body 2C to which the spout 5 is attached in the spout mounting process is turned upside down so as to be inverted in the unfolded state. It is loaded into the mounting jig 30. The thickness of the bottom mounting jig 30 is set so as to be substantially the same as or slightly larger than the width of the lower joint 4a. Further, the height of the bottom mounting jig 30 is such that the upper end of the trunk 2C protrudes upward from the bottom mounting jig 30 in a state where the trunk 2C is loaded in an inverted manner in the bottom mounting jig 30. It will be set to the height to be.

  Next, in the folding process, as shown in FIGS. 8 and 11B, the cylindrical lower portion 2 g of the body portion 2 </ b> C protruding upward from the bottom mounting jig 30 is used as the upper end of the bottom mounting jig 30. Folded outward so that the inside and outside are reversed with the edge as the center, a joining portion 2a formed of an endless annular folded portion is formed on the body portion 2C on the upper side of the bottom mounting jig 30. Thus, the endless annular joint 2a can be easily and efficiently formed by folding back the lower end of the body 2C. In addition, it is preferable to comprise the lower part 2g so that it may expand in diameter as it goes below, and if it comprises in this way, the folding | returning operation | work of the lower part 2g will become easy.

  Next, in the filling step, as shown in FIG. 8, the contents are filled from the discharge nozzle 32 into the body 2C. As described above, when filling the contents from the lower end opening of the body portion 2C, the discharge nozzle 32 having a large diameter can be adopted, so that the filling time of the contents can be greatly shortened. However, this filling step is omitted when the contents are filled after the pouch container 1 is manufactured.

  Next, in the fusing process, as shown in FIGS. 8 and 11C, the bottom forming film 3 </ b> B is fed to the upper side of the joint portion 2 a of the body portion 2 </ b> C, and the bottom mounting jig 30 is Using a heating plate 33 having a slightly wider hexagonal heating portion 33a, the joining portion 2a and the bottom molding film 3B are sandwiched between the heating portion 33a of the heating plate 33 and the bottom mounting jig 30; The bottom molding film 3B is fused to the joining portion 2a, and then the cooling plate 34 is pressed against the fused portion to cool the fused portion. The bottom molding film 3B can be supplied one by one to the upper side of the joining portion 2a. However, as shown in FIG. 8, the long bottom-like film 3B is formed on the upper side of the joining portion 2a. It is preferable to supply them sequentially. Further, when forming the seal portion 4b formed of a protrusion on the lower joint portion 4a, an annular fitting groove or a fitting protrusion is formed on the upper surface of the bottom mounting jig 30, and heating used in the fusion process. On the heating surface of the plate 33, a fitting projection or fitting groove that is concavo-convexly fitted to the fitting groove or fitting projection of the bottom mounting jig 30 is formed.

  Next, in the trimming step, as shown in FIG. 8 and FIG. 11D, the blade portion 35 a of the trimming blade 35 is pressed against the upper surface of the bottom mounting jig 30 to move outward from the bottom mounting jig 30. A pouch container 1 having a lower joint portion 4a formed by cutting the bottom molding film 3B and the bottom portion 2C of the protruding bottom portion 2C and fusing the joint portion 2a of the trunk portion 2 and the outer peripheral portion of the bottom portion 3 to the lower end portion. Will get. In addition, by constructing such that a part of the fusion part between the bottom molding film 3B and the body 2C remains on the unnecessary part side, the unnecessary part of the body 2C is removed from the line together with the unnecessary part of the bottom molding film 3B. It is preferable because it can be discharged.

  As shown in FIG. 8, the pouch container 1 manufactured in this way is transferred to the carry-out conveyor 36 in the vertical direction with the spout 5 on the upper side, and is sequentially carried out.

  In this method of manufacturing the pouch container 1, the cylindrical lower portion 2 g of the body portion 2 </ b> C loaded in the bottom mounting jig 30 is moved outward so that the inside and outside of the bottom mounting jig 30 are inverted. The joint 2a formed of an endless annular folded portion is formed on the body 2C on the upper side of the bottom mounting jig 30 so that the joint 2a can be efficiently formed at the lower end of the body 2 It becomes. In addition, the folding operation of the body portion 2C can be automated relatively easily, and the loading process, the fusion process, and the trimming process can be automated relatively easily, so that the entire bottom mounting process can be automated. It becomes possible. Further, since the width of the joint portion 2a of the body portion 2 is a size corresponding to the width of the upper end surface of the bottom mounting jig 30, the joint portion 2a of the body portion 2 and the outer peripheral portion of the bottom portion 3 are fused. The width of the joined lower joint portion 4a can be sufficiently secured over the entire circumference, and a decrease in bonding strength and a decrease in liquid-tightness due to a partial decrease in the fusion area can be prevented.

  The embodiment of the present invention has been described above. However, the present invention is not limited to the above-described embodiment, and it goes without saying that the configuration can be changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Pouch container 2 Body part 2a Joint part 2b Side part joint part 2c 1st side surface part 2d 2nd side surface part 2e Top joint part 2f Spout attachment hole 2g Lower part 2A Body part film 2B Body part shaping | molding film 2C Body part 3 Bottom part 3A Bottom film 3B Bottom molding film 4 Container body 4a Lower joint part 4b Seal part 5 Spout 5a Tube part 5b Gutter part 5c Lid 5d Annular projection 6 Gusset 6a Mountain crease line 6b Valley crease line 10 Production line 11 Mounting hole trimming treatment Tool 12 Rotary table 13 Cutting plate 13a Blade 14 Die plate 20 Spout mounting jig 21 Rotary table 22 Spout feeder 23 Positioning pin 24 Heating plate 24a Heating unit 30 Bottom mounting jig 31 Conveyor 32 Discharge nozzle 33 Heating plate 33a Heating section 34 Cooling plate 35 Trimming blade 35a Blade section 6 carry-out conveyor

Claims (6)

A container having a multilayer structure having at least a base material layer and a sealant layer and a bottom molding film are used, and one or a plurality of trunk molding films are joined with the sealant layer inside, and a container A body forming step for forming the body of the body, a bottom forming film is fused to the lower end of the body with the sealant layer facing the body, and the lower end opening of the body is closed in a liquid-tight manner. A method for manufacturing a pouch container comprising a bottom mounting step for forming a bottom of a container body,
The bottom mounting step includes
In the cylindrical bottom mounting jig, the loading step of loading the barrel in an unfolded state;
The bottom portion of the barrel portion protruding outward from one end portion of the bottom portion mounting jig is folded outward so that the inside and outside of the bottom portion mounting jig is reversed around the one end edge of the bottom portion mounting jig. A folding step of forming a joining portion composed of an endless annular folded portion on the body portion at one end side of the jig for use;
Fusing step of fusing a bottom molding film to the joint part of the body part to form an annular lower joint part projecting sideways at the lower end part of the container body;
A trimming step for cutting off the lower part of the body part and the unnecessary part of the bottom molding film leaving the lower joint part,
A method for manufacturing a pouch container, comprising:   The manufacturing method of the pouch container of Claim 1 which set the thickness of the sealant layer of the said body part shaping | molding film and the bottom part shaping | molding film to 10-200 micrometers.   The manufacturing method of the pouch container of Claim 1 or 2 which set the width | variety of the said lower junction part to 1-10 mm in the said trimming process.   The sealing part of any one of Claims 1-3 which formed the seal | sticker part which consists of a cyclic | annular protrusion over the perimeter of a lower junction part in the middle part of the width direction of the said lower junction part in the said melt | fusion process. A method for manufacturing a pouch container.   A band-shaped bottom molding film is fed onto one end of the bottom mounting jig over the fusion process and the trimming process, and in the fusion process, the bottom molding film is fused to the folded portion of the barrel. After trimming, when trimming the unnecessary part in the trimming process, part of the fused part is trimmed so that it remains on the unwanted part side, and the unnecessary part at the lower end of the body part is unnecessary for the bottom molding film. The manufacturing method of the pouch container of any one of Claims 1-4 discharged | emitted with a part. The manufacturing method of the pouch container of any one of Claims 1-5 which provided the filling process with which the said trunk | drum is filled with the content between the said folding | returning process and a fusion | melting process.

Images