JP2004042967A - Bag-like container with rib, and forming method and forming apparatus for the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag-like container with ribs, whose rigidity can be improved to give the container superior shape-retainability without raising the price and forming cost of the container, and which is easy to grip and nonslip. <P>SOLUTION: The container is made of a soft packaging material, and is filled with contents and sealed. A plurality of ribs 20 are formed at least one side face of the container, and the ribs 20 are projections formed by extruding part of the side face from the inside to the outside or vice versa. Ribs 21 may be formed by pressing each projection from its both sides to glue together at least part of side walls 20b, 20b of a groove 20a formed on the back of the projection. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bag-like container such as a pouch suitable for filling semi-fluid or fluid contents such as foods, beverages, detergents, etc., a method for molding the bag-like container, and a molding apparatus therefor About.
[0002]
[Prior art]
In recent years, bag-like containers such as pouches are frequently used as containers that are filled with contents such as foods, beverages, detergents, and adhesives and are arranged on store shelves. Among these, in particular, a self-supporting bag-like container arranged in a standing state on a display shelf of a store is often used for refilling detergent or the like.
[0003]
FIG. 8 is a perspective view of an example of such a self-supporting bag-like container.
The bag-like container 100 is composed of a trunk portion 101 and a bottom portion 102 that are made of soft packaging material. A side seal 103 is applied to the peripheral edge of the body 101, a top seal 105 is applied to the top, and a bottom seal 104 is applied between the body 101 and the bottom 102. . Further, a spout 106 is formed by cutting a part of the top seal 105 as indicated by a dotted line in the figure.
[0004]
The body portion 101 of the self-supporting bag-like container 100 is formed with a constricted portion 108 at an intermediate portion thereof. The constricted portion 108 is narrower than other portions, so that the user can easily grasp it.
When the bag-like container 100 is filled with contents such as detergent, the folded bottom 102 expands at the fold line 102a, and the bag-like container 100 becomes conical or pyramid-shaped and can be made independent. .
[0005]
However, the bag-shaped container 100 having the above-described configuration has the following problems.
That is, since the bag-like container is soft, it is easy to sag when placed in a store, and the appearance is poor. In addition, since the bag-like container is soft, the bag-like container 100 is difficult to hold, and when the body 101 of the bag-like container 100 is inadvertently gripped in order to take out the contents from the spout 106, the contents are removed from the spout 106. May jump out. Further, when the contents are taken out by grasping the constricted portion 108, the bag-like container 100 is bent at the constricted portion 108, making it difficult to take out the contents.
[0006]
Although the above problem can be solved to some extent by increasing the thickness of the bag-like container 100 and increasing its rigidity, not only does the amount of material increase increase the price of the bag-like container 100, but the molding cost also increases. There is a new problem of becoming higher. Moreover, the problem of being difficult to hold still cannot be solved.
Furthermore, Japanese Patent Application Laid-Open No. 7-291303 discloses a self-supporting bag-like container in which a pair of linear ribs or linear grooves extending vertically are formed symmetrically inside the side seal 3. ing. Although this bag-shaped container has the advantage that excellent self-supporting stability can be obtained by maintaining the shape of the bag-shaped container, the problem that it is difficult to grasp still cannot be solved, and the contents are taken out. The strength at the time is also insufficient.
Further, the linear rib or the linear groove is formed by pressing a pressing mold heated to a temperature higher than the melting point of the soft packaging material against the soft packaging material forming the bag-like container, When the linear rib or the linear groove is formed, the soft packaging material is thinned, and the bag-like container may be broken by an impact such as a drop impact.
[0007]
[Problems to be solved by the invention]
The present invention has been made in view of the above-mentioned problems, and without increasing the price and molding cost, it is possible to increase rigidity and obtain excellent shape retention, and it is easy to grip and non-slip, It is an object of the present invention to provide a ribbed bag-like container that facilitates taking out an object, a method for molding the ribbed bag-like container, and a molding device.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is a bag-like container molded from a soft wrapping material and sealed by filling the contents, and is provided on at least one side surface of the bag-like container. In this configuration, a plurality of ribs are formed.
According to the bag-shaped container having this configuration, the plurality of ribs formed on the side surface can sufficiently increase the rigidity of the bag-shaped container, so that the bag-shaped container is not easily bent when the contents are taken out. It becomes possible to easily take out objects.
In addition, by forming a plurality of ribs on the side surface over a predetermined width, the ribs prevent slipping, the bag-like container can be easily grasped, and the contents can be easily taken out.
Furthermore, since it is possible to obtain sufficient rigidity even if it is thinner than the conventional bag-like container, the amount of material used for the bag-like container (soft packaging material) is reduced, and the price of the bag-like container is reduced accordingly. can do.
[0009]
According to a second aspect of the present invention, the bag-like container may be a self-supporting container having a trunk portion and a bottom portion, and the rib may be formed on the side surface of the trunk portion in the vertical direction.
According to this configuration, when the self-supporting bag-like container is displayed at the storefront, it is difficult for the neck to drop.
According to a third aspect of the present invention, the rib may be a protrusion formed by extruding a part of the side surface from the inside to the outside or from the outside to the inside.
Such ribs can increase the rigidity of the bag-like container. In addition, since the rib is formed by using a part of the soft packaging material for forming the bag-like container, the material cost is not increased.
[0010]
According to a fourth aspect of the present invention, the ribs are formed by pressing the protrusions from both sides, closely contacting at least a part of the opposing side walls of the groove formed on the back side of the protrusions, and bonding the side walls. As a configuration.
Since such a rib has particularly high rigidity, the rigidity of the bag-like container can be further increased.
Adhesion of the side wall of the groove may be performed by filling the groove with an adhesive, but as described in claim 5, a heat-sealable material is used as the soft packaging material, and the side wall is overheated. It may be melted and bonded.
[0011]
The invention according to claim 6 is characterized in that the rib is formed in at least one direction of the bag-like container, and the seal portion of the soft wrapping material is sealed from one seal portion or the vicinity thereof to the other seal portion. It is the structure formed toward
When a rib is formed by extruding a part of the side surface from the outside to the inside or from the inside to the outside, a force acts in the direction of contracting the width of the side surface. Since the sealed portion is a portion having high rigidity in the bag-like container, the shrinkage increases as the portion is farther from the seal. Therefore, even if a means for forming the constricted portion is not taken in advance, the constricted portion can be formed in the middle portion of the side surface only by forming the rib.
In addition, the direction which forms a rib may be either the longitudinal direction of a bag-like container, or a transversal direction, and these both directions may be sufficient as it.
[0012]
The invention according to claim 7 is a method for forming the ribbed bag-shaped container, wherein a bag-shaped preform is formed in the middle of the ribbed bag-shaped container forming step, and a side surface of the preform is formed. A plurality of cores are pressed against each other at a predetermined interval, and a part of the side surface inserted between the cores is sandwiched by narrowing the interval between the cores, and the ribs are formed by heating and cooling.
Although heating may be performed after a part of the side surface is sandwiched between the cores, a part or the whole of the preform may be heated in advance and then sandwiched between the cores.
In this case, as described in claim 8, when a fluid is press-fitted into the preform and a part of the side surface of the preform is inserted between the cores by the pressure of the fluid. Good. The preform is expanded by the pressure of the fluid, and a part of the side surface can be inserted between the cores. In addition to air, an inert gas such as carbon dioxide or nitrogen gas can be used as the fluid. You may make it press-fit liquids, such as water.
In addition, as described in claim 9, the external pressure of the preform is set lower than the internal pressure, and a part of the side surface of the preform is inserted between the cores. Also good. For example, by drawing the air outside the preformed body to a negative pressure, the preformed body swells and a part of the side surface can be inserted between the cores.
[0013]
As described in claim 10, it is preferable that a part of the side surface sandwiched between the cores is heated from the inside or the outside of the preform. In this case, as described in claim 11, the core may be provided with heating means and heated by the heating means. Furthermore, as described in claim 12, the fluid heated to a predetermined temperature is press-fitted into the preform, and the preform is heated by the pressure of the fluid, and a part of the side surface is placed on the core. You may make it insert between.
[0014]
The invention described in claim 13 is a method for forming the ribbed bag-like container, wherein a part of the side surface of the preform is formed from the outside to the inside or inside by a plurality of protruding members arranged at predetermined intervals. In this method, the ribs are formed by projecting outward from one side and heating and cooling.
According to this method, the rib is formed by forming the groove in a part of the side surface of the preform.
In the invention according to claim 14, in the case where the rib is formed by extruding a part of a side surface from the inside to the outside or from the outside to the inside, the ribs are pressed to press both sides of the rib. This is a method in which at least a part of both side walls of the groove formed on the back side of the groove is adhered and adhered.
This bonding may be performed by filling the inside of the groove with an adhesive, or may be performed by melting the side wall by heating the groove.
[0015]
A molding apparatus for molding the ribbed bag-like container is realized by the inventions according to claims 15 to 18.
The molding apparatus according to claim 15 is provided on the outer side of the side surface of the bag-shaped preform formed during the molding process of the ribbed bag-shaped container, and along an arc having a center of curvature on the side surface side. A plurality of arranged fixed cores, a movable core connected to the fixed core by a link member and movable in the radial direction of the arc, a forward position where the movable core contacts the side surface, and spaced apart from the side surface Moving means for moving forward and backward between the retracted position, insertion means for inserting a part of the side surface between the movable cores, and heating means for heating a part of the side surface inserted between the movable cores It is set as the structure which has.
[0016]
According to this configuration, when the movable core is moved forward and backward by the moving means, the movable core moves forward and backward between a forward position where the movable core contacts the side surface of the preformed body and a retracted position separated from the side surface of the preformed body. Since the fixed cores are arranged along an arc having a center of curvature on the side surface side, the distance between the movable cores becomes narrower as the movable core moves forward. Therefore, in a state where a part of the side surface is inserted between the movable cores by the insertion means, the part of the side surface is sandwiched between the movable cores by further advancing the movable core. And a rib is formed by heating a part of said side surface pinched | interposed between movable cores.
[0017]
The molding apparatus according to claim 16 is provided so as to be able to protrude and retract between the movable cores, and applies a pressing force to a part of the side surface when the movable core moves forward, so that the movable core is interposed between the movable cores. A pressing member for inserting a part of the side surface is provided.
According to this configuration, a part of the side surface can be inserted into the gap between the movable core without using a fluid such as compressed air.
Further, as in the molding apparatus according to claim 17, a heating unit may be provided in the movable core, and a part of the side surface may be heated by the heating unit, or the molding apparatus according to claim 18. As described above, heating means may be provided on the movable core, and a part of the side surface may be heated and melted by the heating means to weld the side wall of the groove formed on the back side of the rib.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a method for forming a container according to the present invention will be described with reference to the drawings.
[0019]
Fig.1 (a) is based on one Embodiment of this invention, and is a perspective view of a bag-shaped container with a rib.
As shown to Fig.1 (a), the bag-shaped container 10 with a rib is comprised from the trunk | drum 11 and the bottom part 12 which were formed with the soft packaging material. Examples of the soft packaging material include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-1, low, medium or high density polyethylene, and linear Polyolefins such as low density polyethylene, ethylene-acetic acid copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), ion-crosslinked olefin copolymer (ionomer), polystyrene, styrene-butadiene copolymer, etc. Aromatic vinyl copolymer, vinyl halide polymer such as polyvinyl chloride, vinylidene chloride resin, nitrile polymer such as acrylonitrile-styrene copolymer, acrylonitrile-styrene-butadiene copolymer, nylon 6, nylon 66, Polyamides such as para or metaxylylene adipamide, polyethylene Single layer structure such as thermoplastic resin films such as polyesters such as phthalate and polytetramethylene terephthalate, various polycarbonates, polyacetals of polyoxymethylenes and paper, etc., and multilayer structure laminated with the above resin films and paper Can be used.
[0020]
A side seal 13 is applied to the peripheral edge of the body 11 of the ribbed bag-like container 10, and a top seal 15 is applied to the top. A bottom seal 14 is provided between the body portion 11 and the bottom portion 12. And the spout 16 is formed by cutting off a part of the top seal 15 as shown by a dotted line in the figure. Further, the body portion 11 is formed with a constricted portion 18 at an intermediate portion thereof.
[0021]
A plurality of ribs 20 (five in this embodiment) are formed on the side surface of the body portion 11 substantially in parallel over a predetermined width. The width for forming the rib 20 may be determined in consideration of the rigidity and ease of gripping of the ribbed bag-like container 10 and the difficulty of slipping when the contents are taken out. For example, it may be about 1/2 to 2/3 of the width of the side surface.
In addition, the ribs 20 may be formed on both front and back side surfaces of the body portion 11, but may be formed on only one side surface as shown in FIG. And it is good to affix a label etc. on the other side surface of the trunk | drum 11 which does not form the rib 20, or to print a brand name.
Furthermore, the rib 20 may be formed substantially linearly from a portion where the bottom seal 14 on the lower side of the body portion 11 is provided to a middle portion above the body portion 11. Of course, if necessary, the rib 20 may be extended to a portion where the top seal 15 is applied or the vicinity thereof, or may be formed in a meandering shape or a curved shape without being limited to a straight shape. Further, the ribs 20 may be formed not only in one direction but in a plurality of intersecting directions.
[0022]
FIG. 1B is an enlarged view in which the rib 20 is sectioned in the II direction of FIG. In this embodiment, the rib 20 is formed by protruding a part of the side surface of the body 11 outward. A part of the side surface of the body part 11 may be protruded inward to form a rib, or a rib protruded to the outside of the side surface and a rib protruded to the inside of the side surface may be mixed. May be.
Moreover, as shown in FIG.1 (c), pressing force is given from the both sides of the rib 20 of FIG.1 (b), the groove | channel 20a inside the trunk | drum 11 which forms the rib 20 is crushed, and the opposing side wall The ribs 21 may be formed by adhering 20b and 20b in close contact with each other. Adhesion of the side walls 20b and 20b may be performed by an adhesive filled in the groove 20a, but may be performed by heat welding or ultrasonic welding. The rib 21 as shown in FIG. 1 (c) has higher rigidity than the rib 20 as shown in FIG. 1 (b) having the groove 20a inside the trunk portion 11, and the rigidity of the ribbed bag-like container 10 is increased. There is an advantage that it can be further increased and is excellent in terms of ease of gripping.
[0023]
FIG. 2 is a diagram for explaining a procedure for forming the ribbed bag-like container 10 as shown in FIG.
First, as shown in FIG. 2 (a), a bag-shaped preform formed of a body portion 11 and a bottom portion 12 is formed by overlapping soft wrapping materials and applying side seals 13 and bottom seals 14 to three peripheral portions. 10 'is molded.
Next, the preformed body 10 'is inserted into the cavity 1a of the fixed mold 1 constituting the molding apparatus for molding the ribbed bag-like container 10 of the present invention, and the portion to which the side seal 13 is applied is held by the pressing member 3, 3 and the fixed mold 1 are used to position and fix the preform 10 '.
Further, as shown in FIG. 2B, a plurality of movable cores 201 are arranged so as to face one side surface of the body portion 11 that forms the rib 20. When the five ribs 20 are formed as in this embodiment, six movable cores 201 are arranged. The movable core 201 is preferably arranged in an arc shape as shown in FIG. 2B so that the interval between the movable cores 201 becomes smaller as the body 11 approaches the body 11.
[0024]
A lid (not shown) is attached to the upper part of the fixed mold 1 to seal the preform 10 '. Then, a compressed air supply source such as a compressor is connected to the lid so that the compressed air can be supplied into the preform 10 '.
Thereafter, as shown in FIG. 2 (c), the movable core 201 is brought into contact with the side surface of the body portion 11, and the compressed air is supplied from the compressor 6 to the preformed body 10 '. A part of the side surface of the trunk portion 11 is inserted between the movable cores 201 and 201 by the compressed air. That is, in this embodiment, the compressed air supply source such as the compressor 6 constitutes an insertion means for inserting a part of the side surface of the body portion 11 between the movable cores 201 and 201.
[0025]
In this state, a part of the side surface of the trunk portion 11 inserted between the movable cores 201 and 201 is heated by the heating blower 7 serving as a heating means. Simultaneously with heating, the movable core 201 is further advanced, and a part of the side surface is sandwiched between the movable cores 201 and 201.
Thereafter, the heating blower 7 is moved away from the body 11 to cool the body 11. Thereby, the rib 20 is formed in the side surface of preforming body 10 '. If the top seal 15 is applied to the preform 10 ', a ribbed bag-like container 10 as shown in FIG. 1A is completed.
In the example shown in FIG. 2 (c), the preformed body 10 ′ is inserted into the cavity 1 a, and a part of the side surface is sandwiched between the movable cores 201, 201, and then the body 11 is heated by the heating blower 7. A part of the side surface is heated, but before the part of the side surface is sandwiched between the movable cores 201 and 201 or before the preformed body 10 'is inserted into the cavity 1a, the preformed body 10 is preliminarily formed. 'Or a part of the body 11 may be heated.
[0026]
2D, a heater 205 is provided inside the movable core 201, and a part of the side surface of the body 11 inserted between the movable cores 201 and 201 is heated by the heater 205, The rib 20 may be formed, or the rib 20 is further heated using the heater 205 to weld the both side walls 20b and 20b (see FIG. 1B) of the groove 20a, and the rib 21 ( You may make it form FIG.1 (c).
[0027]
FIG. 3 is a plan view showing another embodiment of a method and apparatus for forming a ribbed bag-like container.
In this embodiment, the same parts and members as those of the previous embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.
As shown in FIG. 3 (a), a plurality of ribs 20 (in this embodiment, ribs 20 to be formed) for pushing a part of the side surface of the body portion 11 between the movable cores 201 and 201 into the preform 10 '. Five pressing members 206 are provided in accordance with the number of (21).
The pressing member 206 is formed of a flat plate member having substantially the same length as the rib 20 (21) to be formed, and is provided so as to be movable forward and backward with respect to the gap between the movable cores 201 and 201. ing.
[0028]
The pressing member 206 and the driving means for moving the pressing member 206 forward and backward are provided on, for example, a lid (not shown) attached to the fixed mold 1, and when the lid is attached to the fixed mold 1, the pressing member 206 is provided. Each of these may be positioned at a position facing each gap between the movable cores 201 and 201.
As shown in FIG. 3B, the movable core 201 is moved toward the side surface of the body portion 11, and the pressing member 206 is moved from the inside toward the side surface.
When the movable core 201 comes into contact with the side surface, the pressing member 206 presses a part of the side surface located in the gap between the movable cores 201 and 201, so that the gap between the movable cores 201 and 201 Insert part of the side.
[0029]
Similar to the previous embodiment, in this state, the heating blower 7 heats a part of the side surface inserted into the gap between the movable cores 201 and 201. After cooling, when the movable core 201 and the pressing member 206 are retracted, the rib 20 is formed on the side surface of the trunk portion 11.
In this embodiment, the pressing member 296 constitutes an insertion means for inserting a part of the side surface of the body portion 11 into the gap between the movable cores 201 and 201, so that the compressor 6 or the like as described in the previous embodiment is used. There is no need to provide a compressed air supply.
[0030]
FIG. 4 is a side view for explaining the principle of the core 200 used in combination with the fixed mold 1 of the present invention, and FIG. 5 is a perspective view showing the overall configuration and operation of the core 200. In FIG. 5, for the convenience of illustration, parts other than the movable core 201 and the fixed core 202 are indicated by virtual lines.
As shown in FIGS. 4 and 5, the core 200 includes a plurality of fixed cores 202 attached to a fixed part such as the core body 200 a, and a movable core 201 movably attached to each of the fixed cores 202. It is schematically configured from a drive unit 210 that moves the movable core 201 forward and backward.
The movable core 201 and the fixed core 202 are connected by a connecting member 203 that is rotatably attached to the movable core 201 and the fixed core 202 by hinges 201a and 202a.
[0031]
As shown in FIG. 5, the fixed core 202 and the movable core 201 are arranged along an arc having a center of curvature on the fixed mold 1 side, and are movable with respect to the fixed core 202 while rotating the connecting member 203. When 201 is raised, the movable core 201 moves (advances) toward the curvature center.
The drive unit 210 includes an elevating member 212 that slidably mounts the movable core 202 and a cylinder 211 that elevates the elevating member 212. When the cylinder 211 is driven and the piston rod 211a rises and pushes up the lifting member 212, the movable core 201 moves upward while moving up and down, and the movable core 201 moves forward toward the center of curvature.
[0032]
Further, with this advance, the gap between the movable cores 201 and 201 is reduced, so that a portion of the side surface of the body portion 11 is inserted and sandwiched between the movable cores 201 and 201, whereby the strong rib 20 ( 21) can be formed.
When the elevating member 212 descends as the piston rod 211 descends, the movable core 201 descends due to its own weight or the action of an urging means such as a spring (not shown), retreats, and the gap between the movable cores 201 and 201 increases. Thus, the rib 20 (21) can be taken out from the movable cores 201 and 201 together with the preformed body 10 '.
[0033]
According to the molding method and molding apparatus of the present invention, the constricted portion 18 can be formed in the middle of the trunk portion 11 without providing a special process.
FIG. 6 is a plan view of a bag-shaped container with ribs molded by the molding method and molding apparatus.
The rib 20 (21) is formed in a straight line from the portion where the bottom seal 14 between the bottom portion 12 and the trunk portion 11 is provided toward the top seal 15 at the top of the trunk portion 11. When the rib 20 (21) is formed, a force acts in a direction to reduce the width of the body portion 11, but the portion to which the bottom seal 14 and the top seal 15 are applied has high rigidity. small. That is, since the total width l of the rib 20 (21) on the top seal 15 side is smaller than the total width L of the rib 20 (21) on the bottom seal 14 side, the portions provided with the side seals 13 on both sides of the body 11 are attracted to each other. Thus, a constricted portion 18 is formed in the middle of the body portion 11.
[0034]
In the above description, the case where the rib 20 (21) is formed in the self-supporting bag-shaped container including the body portion 11 and the bottom portion 12 has been described, but the present invention is limited to such a self-supporting bag-shaped container. In addition, it can be applied to a flat bag-like container.
FIG. 7 is a perspective view of a flat ribbed bag-like container having ribs formed on the side surfaces.
The rib-like bag-like container 30 is obtained by stacking two soft wrapping materials and applying a side seal 33 around them.
A plurality of ribs 40 (five in the example of FIG. 7) are formed on both the front and back sides or one side 31. The rib 40 may be formed from the vicinity of one side seal 33 to the vicinity of the other side seal 33 along the longitudinal direction of the ribbed bag-like container 30. Thereby, the constriction part 38 is formed in the middle part of the bag-shaped container 30 with a rib.
The width for forming the rib 40 may be determined in consideration of the rigidity and ease of gripping of the ribbed bag-like container 30 and the difficulty of slipping when the contents are taken out, as in the previous embodiment. The width is preferably about 1/2 to 2/3 of the width.
[0035]
Although preferred embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments.
For example, in the first embodiment described above, compressed air is press-fitted into the preformed body 10 ′, a part of the side surface is inserted between the movable cores by the pressure of the compressed air, and one of the side surfaces is inserted by a heating blower. Although described as heating the part, high-temperature compressed air may be press-fitted into the preform 10 'so that heating and insertion between the movable cores can be performed simultaneously.
Further, as the fluid to be press-fitted into the preformed body 10 ′, a gas such as air, carbon dioxide, or nitrogen has been described as an example, but the fluid may be a liquid such as water.
Further, the pressure around the preformed body 10 'is made lower than the internal pressure by, for example, evacuating the air around the preformed body 10'. A part of may be inserted between the cores.
[0036]
【The invention's effect】
As described above in detail, according to the present invention, by forming ribs on the side surfaces, the shape of the bag-shaped container is increased without increasing the price and molding cost of the bag-shaped container, and excellent shape retention. Sex can be obtained. Further, since the ribs are non-slip and are easy to grip, and the rigidity of the bag-like container is increased, the contents do not jump out of the take-out port when the bag-like container is gripped.
Furthermore, according to the present invention, an impact such as a drop impact acts on the bag-like container, and at the same time, the rib expands in a direction perpendicular to the longitudinal direction due to an increase in the internal pressure of the bag-like container. As a result, the internal pressure of the bag-like container is lowered, and the force acting on the seal portion applied to the periphery of the bag-like container is reduced, thereby improving the drop bag resistance.
[Brief description of the drawings]
1A is a perspective view of a ribbed bag-like container according to a first embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along a line II in FIG. 1A. 1 (c) is a cross-sectional view in the II direction of FIG. 1 (a) showing another form of the rib.
FIG. 2 is a diagram for explaining a procedure for forming a ribbed bag-like container 10;
FIG. 3 is a plan view showing another embodiment of a method and apparatus for forming a ribbed bag-like container.
FIG. 4 is a side view illustrating the principle used in combination with a fixed mold.
FIG. 5 is a perspective view showing the overall configuration and operation of the core.
FIG. 6 is a plan view of a ribbed bag-like container molded by the molding method and molding apparatus of the present invention.
FIG. 7 is a perspective view of a flat ribbed bag-like container having ribs formed on the side surfaces thereof.
FIG. 8 is a perspective view of a self-supporting bag-like container according to a conventional example of the present invention.
[Explanation of symbols]
1 Fixed mold
3 Holding member
10 Ribbed bag-like container
10 'preform
11 Torso
12 Bottom
18 Constriction
20,21 Ribs
30 Rib-like container
40 ribs
200 cores
201 Movable core
202 fixed core
203 connecting member
210 Drive unit
211 cylinders
212 Lifting member

Claims (18)

A bag-like container that is molded from a soft wrapping material and filled with the contents and sealed,
A rib-like bag-like container, wherein a plurality of ribs are formed on at least one side surface of the bag-like container. The rib-like bag-like container according to claim 1, wherein the bag-like container is a self-supporting container having a trunk portion and a bottom portion, and the rib is formed in a vertical direction on a side surface of the trunk portion. . The rib-like bag-like container according to claim 1 or 2, wherein the rib is a protrusion formed by extruding a part of the side surface from the inside to the outside or from the outside to the inside. 4. The rib is formed by pressing the protrusion from both sides to closely contact at least a part of opposing side walls of a groove formed on the back side of the protrusion, and bonding the side wall to form the rib. The ribbed bag-like container as described. The ribbed bag-like container according to claim 4, wherein a heat-sealable material is used as the soft wrapping material, and the side wall is heated and melted and bonded. The rib is formed in at least one direction of the bag-like container and is formed from one seal portion or the vicinity thereof toward the other seal portion among the portions where the soft packaging material is sealed. The ribbed bag-like container according to any one of claims 3 to 5. A method for forming a ribbed bag-like container according to any one of claims 1 to 6,
Forming a bag-shaped preform in the middle of the ribbed bag-shaped container molding process,
A plurality of cores are pressed against the side surface of the preform at predetermined intervals, and a part of the side surface inserted between the cores is sandwiched by narrowing the interval between the cores, and the ribs are heated and cooled. A method for forming a ribbed bag-like container. 8. A ribbed bag according to claim 7, wherein a fluid is press-fitted into the preform, and a part of the side surface of the preform is inserted between the cores by the pressure of the fluid. Container molding method. The ribbed bag according to claim 7, wherein a part of the side surface of the preform is inserted between the cores with an external pressure of the preform being lower than an internal pressure. Molding method of container. The method for forming a ribbed bag-shaped container according to any one of claims 7 to 9, wherein a part of the side surface sandwiched between the cores is heated from the inside or the outside of the preform. . The rib-shaped bag-like container according to any one of claims 7 to 10, wherein a heating means is provided in the core, and a part of the side surface sandwiched between the cores is heated by the heating means. Molding method. The fluid heated to a predetermined temperature is pressed into the preform, and a part of the side surface is inserted between the cores while the preform is heated by the pressure of the fluid. Item 10. A method for forming a ribbed bag-like container according to Item 8 or 9. A method for forming a ribbed bag-like container according to any one of claims 1 to 6,
With ribs, a part of the side surface of the bag-like container is protruded from the outside to the inside or from the inside to the outside by a plurality of protruding members arranged at predetermined intervals, and heated and cooled to form a rib A method for forming a bag-like container. When the rib is formed by extruding a part of a side surface from the inside to the outside or from the outside to the inside, both sides of the rib formed on the back side of the rib by pressing both sides of the rib The method for forming a ribbed bag-like container according to any one of claims 7 to 13, wherein at least a part of the wall is adhered and adhered. A plurality of fixed cores provided on the outer side of the side surface of the bag-shaped preform formed in the middle of the molding process of the ribbed bag-shaped container, and arranged along an arc having a center of curvature on the side surface;
A movable core connected to the fixed core by a link member and movable in the radial direction of the arc;
Moving means for moving the movable core forward and backward between a forward position where the movable core abuts on the side surface and a backward position separated from the side surface;
An insertion means for inserting a part of the side surface between the movable cores;
Heating means for heating a part of the side surface inserted between the movable cores;
An apparatus for forming a ribbed bag-like container. A pressing member provided between the movable cores so as to be freely movable, and applying a pressing force to a part of the side surface when the movable core moves forward to insert a part of the side surface between the movable cores; The apparatus for forming a bag-like container with a rib according to claim 15 provided. The apparatus for forming a bag-like container with a rib according to claim 15 or 16, wherein a heating means is provided on the movable core, and a part of the side surface is heated by the heating means. 18. The heating core is provided with a heating means, a part of the side surface is heated and melted by the heating means, and a side wall of a groove formed on the back side of the rib is welded. An apparatus for forming a ribbed bag-like container according to claim 1.

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