JP2014231377A - Extraction tool for bag body, bag body with extraction tool, formation metal mold of extraction tool for bag body, and manufacturing method for extraction tool for bag body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an extraction tool for a bag body, a bag body with the extraction tool, a formation metal mold of the extraction tool for the bag body, and a manufacturing method for the extraction tool for the bag body, in which a blockage cylinder having high barrier properties can be disposed in a base material resin without contacting with a content over a long time and detachment thereof from the base material resin, and thus, easy manufacture and quality improvement can be achieved.SOLUTION: An extraction tool for a bag body is configured from a peripheral wall 10 surrounding a bung hole 5, a blockage cylinder 11 having barrier properties, and a peripheral wall body part 10a made of a base material resin in which the blockage cylinder 11 is embedded. The blockage cylinder 11 is disposed at a position separated from one end and the other end of the peripheral wall body part 10a in an axial direction, and an inner peripheral surface of the blockage cylinder 11 on one end side in the axial direction is so embedded as to be exposed in the bung hole 5. A base material exposed part 41 and a blockage cylinder exposed part 40 of the inner peripheral surface of the peripheral wall 10 are formed into a continuous surface having no step. The blockage cylinder exposed part 40 is covered by a seal wall of a seal cap.

Description

  The present invention provides a bag body pouring tool that is attached to a bag body to pour out the contents in the bag body, a bag body with a pouring tool, a molding die for the bag body pouring tool, and the manufacture of the bag body pouring tool It is about the method.

  In recent years, a bag body with a pouring tool called a spout pouch has become widespread. This pouch with a pouring tool is a plastic pour tool (spout) that is integrally attached to the top of a pouch made of a resin film called aluminum and a barrier material such as aluminum. After filling, a sealing resin cap is attached to the end of the pouring tool.

  This pouch with a pourer is characterized by its light weight, flatness after use before use, and no space, reducing transportation costs or reducing volume as waste That's what it means. In addition, the bag body with the pouring tool is excellent in the extrudability (squeeze property) of the contents because the bag body itself is flexible. For example, in products such as mayonnaise and ketchup, the inside of the container may be Air can be kept to a minimum. Therefore, it can be said that this bag body with a pouring tool is suitable as a container for dairy products such as the aforementioned mayonnaise and ketchup, edible oil, alcoholic beverages, seasonings, condensed milk and the like that are easily oxidized.

  However, this bag with a pouring tool can provide a sufficient gas barrier property by selecting and laminating a film having gas barrier properties in the bag portion, while the pouring tool portion is made of polyethylene or polypropylene. It is difficult to say that it is sufficient in terms of gas barrier properties when composed of a simple resin such as.

  In addition, when fruit juice with low viscosity is the contents, the contents in the bag with the pouring tool convect due to vibration during distribution, temperature changes at the time of inventory, etc., so it is difficult for the contents to deteriorate due to oxidation. However, when the aforementioned mayonnaise, ketchup, or the like is the content, the viscosity of the mayonnaise is high, so the content tends to stay in the vicinity of the pouring tool for a long time, and the content may deteriorate due to oxidation. .

  As a pouring tool for coping with this problem, an arrangement has been devised in which a blocking cylinder made of a material excellent in gas barrier properties is arranged inside a peripheral wall surrounding the pouring hole of the pouring tool (for example, a patent) References 1 and 2).

  The pouring tool described in Patent Document 1 forms a skeleton part of a shut-off cylinder with a material excellent in gas barrier properties, and is easily welded to the surface of the skeleton part with a base resin filled in a mold during injection molding. A blocking cylinder is formed by bonding resin, and the blocking cylinder is placed in a mold and injection molded.

  The pouring tool described in Patent Document 2 is formed by disposing a blocking cylinder made of a material excellent in gas barrier properties in a molding die and performing injection molding so that one end surface in the axial direction of the blocking cylinder is exposed to the outside of the product. It is what I did. In this pouring tool, a separate ring-shaped protective layer is bonded and fixed to a portion where the blocking cylinder is exposed to the outside after injection molding. For this reason, also in this extraction | pouring tool, the interruption | blocking cylinder excellent in gas barrier property does not touch a content directly.

JP 2001-213455 A JP 2007-261630 A

  However, the dispensing tool described in Patent Document 1 must be prepared with a blocking cylinder having a structure in which the surface of the skeleton part with excellent gas barrier properties is covered with a material with excellent weldability. Therefore, many complicated processes are required, and there is a concern that the manufacturing cost will rise.

The pouring tool described in Patent Document 2 is injection-molded so that one end in the axial direction of the blocking cylinder is exposed to the outside of the product. One end surface in the axial direction of the blocking cylinder is brought into contact with the portion, and in this state, the base resin that covers the outside of the blocking cylinder is injected. In this case, although the blocking cylinder is positioned at an appropriate position in the product, one end surface in the axial direction of the blocking cylinder is completely exposed from the end of the base resin, that is, the end of the base resin Since an opening that substantially matches the cross-sectional shape of the blocking cylinder is formed, there is a concern that the blocking cylinder and the base resin may be peeled off after manufacturing and the shape cannot be maintained.
That is, when the shielding cylinder is formed of a resin having a high gas barrier property, the resin usually does not have a property of adhering to the base resin such as polyethylene. The shape may not be maintained.

  In view of this, the present invention facilitates manufacturing by allowing a high barrier barrier cylinder to be placed in the base resin without touching the contents for a long time and without causing separation from the base resin. It is intended to provide a bag body pouring tool, a bag body with a pouring tool, a molding die for the bag body pouring tool, and a method for producing the bag body pouring tool that can improve quality.

The bag body pouring tool according to the present invention has a pouring hole for conducting the inside and the outside of the bag body, and a barrier cylinder having a barrier property is embedded in the base resin of the peripheral wall surrounding the pouring hole. In addition, in a bag body pouring tool in which a sealing cap is detachably attached to one axial end portion of the peripheral wall, the peripheral wall is formed from the blocking cylinder and the base resin in which the blocking cylinder is embedded. An inner peripheral surface at least on one end side in the axial direction at a position spaced from one end and the other end in the axial direction of the peripheral wall main body. Of the inner peripheral surface of the peripheral wall that is embedded so as to be exposed in the hole, the interrupting tube exposing portion where the inner peripheral surface of the blocking tube is exposed, and the peripheral wall main body portion on one end side in the axial direction of the blocking cylinder The base material exposed portion where the base resin of the base material is exposed is formed by a seal wall protruding from the sealing cap. Aru Te those characterized by being covered.
In the case of this bag body pouring tool, the blocking cylinder is arranged so that at least a part of the inner peripheral surface is exposed to the pouring hole, but the circumferential wall main body portion is provided with one end portion in the axial direction of the peripheral wall main body portion. Since it is embedded so as to be separated from the other end, separation of the peripheral wall main body from the base resin is regulated. Further, the blocking cylinder exposed portion on the inner peripheral surface of the blocking cylinder is exposed in the pouring hole, but when the sealing cap is attached to one end portion in the axial direction of the peripheral wall, the blocking cylinder exposed portion is The exposed portion is continuously covered with the sealing wall of the sealing cap. As a result, long-term contact between the shielding cylinder exposed portion and the contents can be prevented.

In the bag body extraction tool according to the present invention, the first concave portion in which the other end surface in the axial direction of the shielding cylinder embedded in the peripheral wall main body portion faces the outer peripheral surface on the other axial end side of the peripheral wall main body portion. May be provided.
In this case, at the time of manufacturing, a part of the molding die is brought into contact with the other end surface in the axial direction of the shielding cylinder at a portion corresponding to the first recess, whereby the axial position of the other end in the axial direction of the shielding cylinder It is possible to regulate the deviation.

Moreover, the bag body extraction tool which concerns on this invention is the outer peripheral surface of the axial direction other end side of the said interruption | blocking cylinder embed | buried in the said peripheral wall main body part on the outer peripheral surface of the axial direction other end side of the said surrounding wall main body part. A second recess facing the surface may be provided.
In this case, at the time of manufacture, a part of the molding die is brought into contact with the outer peripheral surface on the other end side in the axial direction of the shielding cylinder at a portion corresponding to the second recess, thereby It is possible to regulate the displacement in the radial direction.

  The bag body with a pouring tool according to the present invention is characterized in that the bag pouring tool according to any one of the above is attached to the bag body.

The molding die for the bag body pouring tool according to the present invention has a pouring hole for connecting the inside and the outside of the bag body, and has a barrier property in the base resin of the peripheral wall surrounding the pouring hole. In a molding die of a bag body extraction tool in which a blocking cylinder is embedded, a first molding die for shaping at least a part of the inner peripheral surface and one end in the axial direction of the peripheral wall, and at least one outer peripheral surface of the peripheral wall And a second molding die for shaping the other end in the axial direction, the first molding die is provided with a cylinder holding portion for holding the blocking cylinder, A plurality of positioning bases that protrude toward one end surface in the axial direction of the shielding cylinder and that abut on the one end surface in the axial direction of the shielding cylinder at a plurality of positions spaced apart in the circumferential direction are provided. It is.
In the case of manufacturing a bag body pouring tool using this molding die, first, the cylindrical holding portion is held in an externally fitted state by the cylinder holding portion, and in this state, the first molding die and the second molding die are brought into contact with each other. A molding space is formed between the two, and a molten base resin is injected and filled into the molding space. Thus, after the base resin is solidified, the first mold and the second mold are opened, and the cylinder holding part is pulled out from the inner peripheral surface of the blocking cylinder. A bag body pouring tool that is embedded in a position spaced from the other end portion and the other end portion and has no step between the base resin portion and the blocking cylinder portion on one end side in the axial direction of the inner peripheral surface of the peripheral wall is formed.

In the molding die of the bag dispensing tool according to the present invention, the second molding die may be provided with a first restriction projection that abuts against the other end surface in the axial direction of the blocking cylinder.
In this case, the position of the axial displacement of the blocking cylinder in the other end direction is regulated by the first regulating projection.

Further, in the molding die for the bag body dispensing tool according to the present invention, the second molding die is provided with a second restricting protrusion that contacts the outer peripheral surface of the other end side in the axial direction of the blocking cylinder. Anyway.
In this case, the radial displacement of the other axial end of the blocking cylinder is regulated by the second regulating projection.

  The manufacturing method of the bag body pouring tool according to the present invention uses the molding die of any one of the bag body pouring tools, and when the tube holding portion holds the block tube, the block tube is The fitting stroke of the blocking cylinder with respect to the cylinder holding part is managed so as to be arranged at a predetermined distance from one end and the other end in the axial direction of the peripheral wall, and the base resin is placed in the molding die. It is characterized by injection filling.

  Therefore, according to this invention, it becomes possible to arrange the blocking cylinder in the base resin without causing separation between the blocking cylinder and the base resin, thereby facilitating the manufacture and improving the quality. . Further, according to the present invention, the sealing wall of the sealing cap continuously covers the base material exposed portion and the blocking cylinder exposed portion with the sealing cap attached to one end portion in the axial direction of the peripheral wall. Therefore, it is possible to prevent contact between the blocking cylinder and the contents for a long time.

It is a side view of the extraction tool of one embodiment of this invention. It is a perspective view of the extraction tool of one embodiment of this invention. It is sectional drawing corresponding to the AA cross section of FIG. 2 of the extraction tool of one Embodiment of this invention. It is sectional drawing which follows the axial direction of the shaping die of one Embodiment of this invention. It is a perspective view of the core type | mold (1st shaping | molding die) of the shaping die of one Embodiment of this invention. It is an expanded sectional view corresponding to the B section of Drawing 4 of a metallic mold of one embodiment of this invention. It is sectional drawing which follows the axial direction of the shaping die of one Embodiment of this invention.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
1-3 is a figure which shows the extraction tool 1 for bag bodies (henceforth "the extraction tool 1") of this embodiment. The pouring tool 1 of this embodiment is attached to the sealed bag body 2 so that the inside is conducted, and constitutes the bag body 100 with the pouring tool (see FIG. 1).
The pouring tool 1 is inserted into the bag body 2, and is formed on the outer surface of the bag body 2 by welding and fixing the inner surface of the bag body 2 by heat sealing. A projecting mouth portion 4 is provided. The mouth portion 4 is formed in a substantially cylindrical shape, and the bonding portion 3 is formed in a substantially elliptical cross-sectional shape that is slightly larger than the outer diameter of the mouth portion 4. To be precise, the cross section of the bonding portion 3 is formed in a substantially elliptical shape in which both end portions on the long diameter side are flattened. Thereby, in a state where the bonding part 3 of the dispensing tool 1 is inserted into the bag body 2, the opposing film surface of the bag body 2 is welded and fixed to the outer surface of the bonding part 3 without a gap.

  Further, a continuous extraction hole 5 having a circular cross section is formed at the axial center position of the mouth portion 4 and the bonding portion 3. The pouring hole 5 has an end portion on the adhesive portion 3 side opened inside the bag body 2 and an end portion on the mouth portion 4 side of the bag body 2 when the pouring tool 1 is attached to the bag body 2. It opens to the outside. In this embodiment, the mouth part 4 and the adhesive part 3 constitute a peripheral wall surrounding the extraction hole 5. Hereinafter, the mouth portion 4 and the bonding portion 3 are collectively referred to as a peripheral wall 10 as appropriate.

  A resin sealing cap 6 for sealing the opening of the pouring hole 5 is detachably screwed into the mouth portion 4 arranged on one end side in the axial direction of the peripheral wall 10. . A thread 7 to which the sealing cap 6 is screwed is formed on the outer peripheral surface of the mouth portion 4. Further, a locking flange 8 that projects outward in the radial direction is integrally formed on the outer peripheral surface of the mouth portion 4 on the side close to the bonding portion 3. The locking flange 8 is provided so as to be easily gripped when the pouch body 100 with the dispensing tool is conveyed.

The entire main portion of the dispensing tool 1 is formed of a resin such as polyethylene or polypropylene (hereinafter referred to as “base resin”), and the peripheral portion of the dispensing hole 5 is made of a material excellent in oxygen barrier properties. A cylindrical blocking cylinder 11 is embedded. The blocking cylinder 11 of this embodiment uses an ethylene-vinyl alcohol copolymer resin (EVOH) as a basis and a polymer obtained by further polymerizing a polyolefin resin for the purpose of improving moldability. Below, it demonstrates as what uses polyethylene as an example of base resin.
In this embodiment, the blocking cylinder 11 made of a material excellent in oxygen barrier properties is used. However, the blocking cylinder 11 is made of a material excellent in barrier properties against gases other than oxygen, or ultraviolet rays or the like. It is also possible to use a material excellent in light barrier properties. When a material excellent in barrier properties against light rays such as ultraviolet rays is used for the blocking cylinder 11, for example, a barrier property against light rays can be imparted by adding a pigment to the resin. As the pigment added to the resin, inorganic pigments such as carbon black and titanium oxide can be used.
Moreover, it is also possible to give the barrier property with respect to both a light beam and a gas by combining the barrier cylinder 11 with a light beam barrier layer and a gas barrier layer to form a multilayer.
The blocking cylinder 11 of this embodiment uses an ethylene-vinyl alcohol copolymer resin (EVOH) as a basis and a polymer obtained by further polymerizing a polyolefin resin for the purpose of improving moldability.
Moreover, the part (part other than the interruption | blocking cylinder 11) formed with base-material resin among the surrounding walls 10 of the extraction tool 1 shall be called the surrounding wall main-body part 10a.

  As shown in FIG. 3, the blocking cylinder 11 embedded in the base resin of the pouring tool 1 is a range extending from the vicinity of the end of the mouth portion 4 to a part of the bonding portion 3 in the peripheral wall main body portion 10 a. (A position separated from one end and the other end in the axial direction). Although the blocking cylinder 11 blocks oxygen that permeates the pouring tool 1 and penetrates into the pouring tool 1, the adhesive portion 3 is disposed inside the bag body 2 through which oxygen hardly permeates. By arranging in the above range, the intrusion of oxygen into the inside of the extraction tool 1 can be substantially blocked.

  Moreover, as shown in FIG. 2, FIG. 3, the inner peripheral part by the side of the opening | mouth part 4 of the surrounding wall main-body part 10a is shown. It is cut into an annular shape over a predetermined range from the end on the mouth 4 side. By this meat removal, the inner peripheral surface of the blocking cylinder 11 is exposed in the pouring hole 5 over a certain range from the end on the mouth portion 4 side, and the blocking cylinder 11 and the inner peripheral surface of the peripheral wall main body 10a A region adjacent on the mouth 4 side is a continuous surface having no step with the inner peripheral surface of the blocking cylinder 11. The inner peripheral surface of the blocking cylinder 11 exposed in the pouring hole 5 by the meat removal constitutes the blocking cylinder exposed portion 40 of the inner peripheral surface of the peripheral wall 10, and the inner periphery on the mouth 4 side of the peripheral wall main body 10a. The surface constitutes the base material exposed portion 41 on the mouth portion 4 side of the inner peripheral surface of the peripheral wall 10. In addition, the annular step part 44 by base-material resin is provided in the adhesion part 3 side by the said meat removal on the internal peripheral surface of the surrounding wall 10. As shown in FIG.

  Here, the blocking cylinder 11 has a part of the inner peripheral surface on the mouth portion 4 side exposed in the pouring hole 5, but the end portion on the mouth portion 4 side of the blocking cylinder 11 has a base of the peripheral wall main body portion 10 a. Since the base material resin of the material exposed portion 41 wraps around (this portion is referred to as “wraparound portion 42”), the positional deviation on the mouth portion 4 side in the axial direction is restricted by the wraparound portion 42. Further, the end of the blocking cylinder 11 on the bonding portion 3 side is completely embedded in the base resin of the peripheral wall main body portion 10a (this portion is referred to as “embedding portion 43”), and thus the bonding in the axial direction is performed. The positional deviation on the part 3 side is regulated by the embedded part 43.

  On the other hand, as shown in FIG. 3, the sealing cap 6 has a substantially cylindrical sealing wall 12 protruding from the inner surface of the bottom wall facing the peripheral wall 10 side. When the sealing cap 6 is screwed into the mouth portion 4, the seal wall 12 is provided almost over the entire area of the base material exposed portion 41 and the blocking cylinder exposed portion 40 on the inner peripheral surface (pour hole 5) of the peripheral wall 10. Closely. At this time, the front end side region of the seal wall 12 is also in close contact with the step portion 44 of the base resin. Therefore, the blocking cylinder exposed portion 40 on the inner peripheral surface of the peripheral wall 10 is covered with the seal wall 12 continuously with the base material exposed portion 41 inside the pouring hole 5.

In addition, a first recess 15 that is recessed in a part of the outer peripheral surface (the outer peripheral surface on the other end side in the axial direction) of the bonding portion 3 of the peripheral wall main body portion 10 a to a position facing the other end surface in the axial direction of the blocking cylinder 11. And the 2nd recessed part 16 shallower than the 1st recessed part 15 is formed continuously. The second recess 16 is disposed adjacent to the mouth 4 side of the first recess 15, and is recessed to a position substantially facing the outer peripheral surface of the blocking cylinder 11.
Since the first concave portion 15 and the second concave portion 16 are formed on the bonding portion 3 of the peripheral wall main body portion 10a, when the film surface of the bag body 2 is welded and fixed to the outer surface of the bonding portion 3, It is sealed by the film surface.

4-7 is a figure which shows the molding die 20 for injection molding which manufactures the extraction tool 1. FIG.
The molding die 20 includes a core die 21 (first molding die) for modeling the inner peripheral surface of the peripheral wall 10 (peripheral wall body portion 10a) of the pouring tool 1 and one end in the axial direction (end portion on the mouth portion 4 side). And a cavity mold 22 (second mold) for modeling the outer peripheral surface of the peripheral wall 10 of the pouring tool 1 and the other end in the axial direction (the end on the bonding part 3 side).

  The core mold 21 is provided with a base wall 23 that forms one end face (end face on the mouth 4 side) of the peripheral wall main body portion 10a of the pouring tool 1 and a front wall projecting from substantially the center of the base wall 23. And a molding shaft 25 for modeling a part of the inner peripheral surface (the extraction hole 5). The molding shaft 25 includes a large-diameter shaft portion 25a protruding from the base wall 23, a medium-diameter shaft portion 25b coaxially connected to the large-diameter shaft portion 25a, and a small-diameter coaxially connected to the medium-diameter shaft portion 25b. And a shaft portion 25c.

The large-diameter shaft portion 25a has a base region connected to the base wall 23 as a modeling portion 25a-1 for modeling the base material exposed portion 41 on the inner peripheral surface of the peripheral wall 10, and a region adjacent to the base portion is an outer periphery. It is set as the cylinder holding | maintenance part 25a-2 by which the interruption | blocking cylinder 11 is fitted by the surface. The outer peripheral surface of the large-diameter shaft portion 25a is a continuous cylindrical surface having a constant diameter. Therefore, the modeling part 25a-1 and the cylinder holding part 25a-2 are formed on a continuous surface having no step. As shown in FIG. 6, an arcuate curved surface R is provided at the outer peripheral corner portion on the distal end side of the large diameter shaft portion 25a, and the blocking cylinder 11 can be easily attached to the outer peripheral surface of the large diameter shaft portion 25a from the distal end side. Can be fitted to.
The medium-diameter shaft portion 25b is disposed with a predetermined gap on the inner peripheral side of the blocking cylinder 11 held by the large-diameter shaft portion 25a, and on the bonding portion 3 side of the blocking cylinder 11 on the inner peripheral surface of the peripheral wall 10. Model adjacent areas. Further, the small-diameter shaft portion 25 c shapes an end region on the bonding portion 3 side in the inner peripheral surface of the peripheral wall 10.

  By the way, when the blocking cylinder 11 is set on the large-diameter shaft portion 25a of the core mold 21, as shown in FIG. 5, the blocking cylinder 11 is press-fitted into the large-diameter shaft portion 25a by the conveying device 30. The press-fitting stroke of the blocking cylinder 11 with respect to the large-diameter shaft portion 25a is accurately managed by the controller of the transport device 30. That is, the blocking cylinder 11 is set to the cylinder holding part 25 a-2 on the large diameter shaft part 25 a by the stroke management of the conveying device 30.

On the other hand, the cavity mold 22 is connected to an injection cylinder (not shown) for supplying a base resin, and is constituted by a plurality of divided blocks that can be separated so that a product can be taken out after molding. Further, in the portion of the cavity mold 22 facing the molding space M, the position corresponding to the first concave portion 15 and the second concave portion 16 of the peripheral wall main body portion 10a of the pouring tool 1 is arranged in the axial direction of the blocking cylinder 11. A first restricting protrusion 28 that abuts on the other end face and a second restricting protrusion 29 that abuts on the outer peripheral face on the other end side in the axial direction of the blocking cylinder 11 are provided. In the case of this embodiment, the first restricting protrusion 28 and the second restricting protrusion 29 are integrally formed as shown in FIG.
Further, the divided block of the cavity mold 22 that holds the first restricting protrusion 28 and the second restricting protrusion 29 can move in the radially outward direction of the product (pouring tool 1) when the mold is opened.

Next, the manufacture of the dispensing tool 1 using the above molding die 20 will be described.
First, the prepared blocking cylinder 11 is set on the large-diameter shaft portion 25a of the molding shaft 25 of the core mold 21 as shown in FIG. This setting is performed by the conveying device 30 as described above, and the blocking cylinder 11 is press-fitted into the range of the cylinder holding portion 25a-2 in the large diameter shaft portion 25a.
The blocking cylinder 11 is formed by forming a long cylinder by an extrusion molding machine using the above-described oxygen barrier resin as a raw material, and cutting the long cylinder into a predetermined dimension.

  Next, as shown in FIG. 4, the core mold 21 and the cavity mold 22 are clamped to form a molding space M between the core mold 21 and the cavity mold 22. At this time, the first restricting protrusion 28 and the second restricting protrusion 29 projecting into the cavity mold 22 are end faces on the other end side in the axial direction of the blocking cylinder 11 as shown in FIGS. In contact with the outer peripheral surface or in close proximity to them.

  Thereafter, a molten base resin is injected and filled into the molding space M from an injection cylinder (not shown). The injection filling of the base resin is performed from the bottom side of the cavity mold 22. When the molten base resin is injected and filled from the bottom side of the cavity mold 22, the base resin wraps around the outer peripheral side and the inner peripheral side of the blocking cylinder 11 and spreads into the molding space M. At this time, the base resin that wraps around the inner peripheral side of the blocking cylinder 11 flows to the step portion between the medium-diameter shaft portion 25b and the large-diameter shaft portion 25a of the molding shaft 25, and wraps around the outer peripheral side of the blocking cylinder 11. The base resin strikes the base wall 23 and flows into the one end face side of the blocking cylinder 11 in the axial direction. Thus, the molten resin that has flowed into the one end face side of the blocking cylinder 11 forms the wraparound portion 42 of the peripheral wall 10 of the pouring tool 1 as shown in FIG.

  As described above, when a high-temperature molten resin is introduced into the molding space M at a high pressure, various loads are applied to the blocking cylinder 11 in the molding die 20 so as to push and move in the axial direction and the radial direction. Since the blocking cylinder 11 is fitted to the large-diameter shaft portion 25a (cylinder holding portion 25a-2) of the molding shaft 25 at one end side in the axial direction, the inside of the molding space M does not vary greatly. Further, when the other end side in the axial direction of the blocking cylinder 11 is swung by the molten resin, the swing is restricted by the first restriction protrusion 28 and the second restriction protrusion 29.

  Thereafter, the core mold 21 and the cavity mold 22 are opened after the base resin in the molding space M is solidified, and the molded product is taken out from the molding die 20. Thereafter, post-treatment such as deburring is performed on the molded product, and the manufacture of the dispensing tool 1 is completed.

  As shown in FIG. 2, the pouring tool 1 manufactured in this way has a blocking cylinder exposed portion 40 formed on the inner peripheral edge of the peripheral wall 10 on the mouth 4 side so that a part of the blocking cylinder 11 is exposed to the inside. The base material exposed part 41 is formed adjacent to the shielding cylinder exposing part 40 so as to be continuous with the shielding cylinder exposing part 40. Further, on the outer surface of the peripheral wall 10 on the bonding portion 3 side, the first concave portion 15 and the second concave portion 16 which are traces of the first restricting protrusion 28 and the second restricting protrusion 29 are formed.

  Since the resin having a high oxygen barrier property that forms the blocking cylinder 11 usually has a hydroxyl group in the molecular structure, the resin tends to become brittle or have a low barrier property when exposed to moisture for a long time. However, as described above, the blocking cylinder exposed portion 40 is a cylindrical seal projecting from the inner surface of the sealing cap 6 when the sealing cap 6 is attached to the mouth portion 4 of the peripheral wall 10 as described above. Since the first concave portion 15 and the second concave portion 16 are covered with the wall 12 and are sealed by the film surface of the bag body 2, such a problem during use does not occur.

Further, in the dispensing tool 1 shaped by the molding die 20 described above, the blocking cylinder 11 is accurately positioned at a predetermined position in the base resin of the peripheral wall body 10a by the cylinder holding part 25a-2 of the molding shaft 25. In addition, the wraparound portion 42 of the peripheral wall main body 10a is formed adjacent to one end surface in the axial direction of the blocking cylinder 11, and the other end in the axial direction is disposed in the embedded portion 43 of the peripheral wall main body 10a. Therefore, peeling between the blocking cylinder 11 and the base resin can be reliably regulated, and the shape of the dispensing tool 1 can be stably maintained.
That is, since the resin having an oxygen barrier property that forms the shielding cylinder 11 does not have adhesiveness with polyethylene or the like as the base resin, if there is an opening space at the axial end of the shielding cylinder 11, the opening stub In the pouring tool 1 manufactured as described above, the separation between the blocking cylinder 11 and the base resin can be ensured by the wraparound portion 42 and the embedded portion 43. Regulated by
Therefore, by using the molding die 20 described above, the blocking cylinder 11 can be accurately positioned and disposed in the base resin without causing separation between the blocking cylinder 11 and the base resin. As a result, it is possible to facilitate the manufacture of the dispensing tool 1 and improve the product quality.

By the way, it is known that by making the blocking cylinder 11 as short and thick as possible, it is possible to prevent deformation due to the deflection of the blocking cylinder 11 during injection molding. However, there is a limit to shortening the blocking cylinder 11 due to the necessity of a barrier function, and there is a limit to increasing the thickness of the blocking cylinder 11 from the viewpoints of dimensional stability and strength maintenance. is there. That is, with regard to the thickness, if the thickness of the shielding cylinder 11 is made too thick, heat is trapped in the center of the shielding cylinder 11 when the shielding cylinder 11 is manufactured, and uneven shrinkage occurs during cooling, resulting in unstable dimensions. In addition, when the thickness of the blocking cylinder 11 is increased, the thickness of the base resin is decreased by an amount corresponding to the increased thickness, and as a result, the strength is reduced.
On the other hand, the molding die 20 can reliably prevent deformation due to the deflection of the blocking cylinder 11 during injection molding without shortening or increasing the thickness of the blocking cylinder 11.

  Here, the first restricting protrusion 28 and the second restricting protrusion 29 on the cavity mold 22 side are not necessarily provided. However, the first restricting protrusion 28 and the second restricting protrusion 29 are not provided as in this embodiment. When provided, it is possible to more reliably regulate the deflection on the other end side in the axial direction of the blocking cylinder 11 during injection molding.

  In addition, this invention is not limited to said embodiment, A various design change is possible in the range which does not deviate from the summary.

DESCRIPTION OF SYMBOLS 1 Pouring tool 2 Bag body 5 Pouring hole 6 Sealing cap 10 Perimeter wall 10a Perimeter wall main-body part 11 Blocking cylinder 12 Seal wall 15 1st recessed part 16 2nd recessed part 20 Molding die 21 Core type | mold (1st shaping | molding die)
22 Cavity mold (second mold)
25a-1 modeling part 25a-2 cylinder holding part 28 first restricting protrusion 29 second restricting protrusion 40 blocking cylinder exposing part 41 base material exposing part

Claims (8)

A shutoff cylinder having a barrier property is embedded in the base resin of the peripheral wall surrounding the pouring hole, and has one end in the axial direction of the peripheral wall. In the pour tool for the bag body, in which the sealing cap is detachably attached to the part,
The peripheral wall has the blocking cylinder, and a peripheral wall main body portion made of the base resin in which the blocking cylinder is embedded,
The blocking cylinder is embedded at a position separated from one end and the other end in the axial direction of the peripheral wall main body so that at least an inner peripheral surface on one end side in the axial direction is exposed in the extraction hole,
Of the inner peripheral surface of the peripheral wall, the shield cylinder exposed portion where the inner peripheral surface of the shield tube is exposed, and the base material exposure where the base resin of the peripheral wall main body portion is exposed on one end side in the axial direction of the shield cylinder. A pour-out tool for a bag, wherein the portion is covered with a seal wall protruding from the sealing cap.   The outer peripheral surface on the other end side in the axial direction of the peripheral wall main body portion is provided with a first recess facing the other end surface in the axial direction of the blocking cylinder embedded in the peripheral wall main body portion. The extraction tool for bag bodies of Claim 1.   The outer peripheral surface on the other end side in the axial direction of the peripheral wall main body portion is provided with a second recess facing the outer peripheral surface on the other end side in the axial direction of the blocking cylinder embedded in the peripheral wall main body portion. The pour tool for bag bodies according to claim 1 or 2. The bag body pouring tool of any one of Claims 1-3 is attached to the bag body, The bag body with a pouring tool characterized by the above-mentioned. A shutoff cylinder having a barrier property is embedded in the base resin of the peripheral wall surrounding the pouring hole, and has one end in the axial direction of the peripheral wall. In the molding die of the pour tool for the bag body, in which the sealing cap is detachably attached to the part,
A first mold for shaping at least a part of the inner peripheral surface of the peripheral wall and one end in the axial direction;
A second mold for shaping at least a part of the outer peripheral surface of the peripheral wall and the other end in the axial direction;
The first molding die is continuously provided in the shaping portion on the inner peripheral surface of the peripheral wall, and in the molding space between the first molding die and the second molding die, in the axial direction of the molding space. A cylinder holding part that holds the blocking cylinder in an externally fitted state at a position spaced from the one end and the other end;
For the bag body, wherein the tube holding portion is formed on one end side region in the axial direction of the modeling portion of the inner peripheral surface of the peripheral wall of the first mold and a continuous surface without a step. Mold for pouring tool.   The molding die for a bag body pouring tool according to claim 5, wherein the second molding die is provided with a first restricting protrusion that abuts against the other end surface in the axial direction of the blocking cylinder. .   7. The bag body according to claim 5, wherein the second mold is provided with a second restricting protrusion that abuts on an outer peripheral surface on the other end side in the axial direction of the blocking cylinder. Mold for pouring tool. Using the molding die of the pour tool for a bag according to any one of claims 5 to 7,
When the blocking cylinder is held by the cylinder holding section, the blocking cylinder is disposed at a position spaced a predetermined distance from one end and the other end in the axial direction of the peripheral wall. Manage the mating stroke of the shut-off cylinder,
A method of manufacturing a bag body pouring tool, wherein a base resin is injected and filled into the molding die.

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