JPH048300B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing an extruded laminate tube with a blind lid, and in particular, the blind lid, which has excellent fragrance retention and impermeability to oxygen, etc., can be easily attached to the tube extrusion outlet. The purpose of this invention is to prevent the contents from deteriorating by attaching the tube to the tube, as well as to streamline the production of extruded laminate tubes with blind lids and significantly reduce product costs.

(Prior art) An extruded tube with a so-called blind lid, which is a metal tube formed by impact molding and whose extrusion opening is closed with a seal made of synthetic resin or aluminum foil, is already known (1983- No. 134151).

Later, plastic tubes (Japanese Unexamined Patent Publication No. 79258/1979) and laminate tubes were developed in order to ensure the tube's resilience, and these also had blind lids on their extrusion ports to protect their contents and maintain virginity. Attempts have been made to implement this.

(Problems to be Solved by the Invention) However, in the field of plastic or laminate tubes, there are various problems in making the blind lids made of the same material as the containers.

In other words, in the former case, although the blind lid can be formed integrally with the container by blow molding, etc., the materials that can be used must be specified due to molding restrictions, and the barrier properties of the container body as well as the integrated lid are significantly lacking, and at best it is virgin-like. In the latter case, the barrier properties of the tube body are sufficient, but due to manufacturing limitations with materials with such barrier properties, such as laminated materials containing aluminum foil. However, it was impossible to mold the blind cover in one piece.

For this reason, in the latter case, a blind lid material made of a separate material is prepared separately from the tube body and shoulder parts, and then it is applied to the extrusion port of the shoulder part. Currently, it is necessary to prepare a process and materials separate from the process of joining the shoulder parts.

On the other hand, in the manufacturing process of laminated tubes, in order to maintain fragrance blocking properties so that outside air does not affect the contents through the shoulder parts, polypropylene resin, polyamide resin, urea resin, etc. are used in the tube manufacturing process. After drawing a laminated material of one or more materials having fragrance retention properties and impermeability to oxygen, such as aluminum foil, the punched barrier material is integrally fused to the outer peripheral surface of the shoulder. It is being put on.

This barrier material is shaped like a donut with a circular cutout in the center, and all of the circular scraps in the center have been discarded.

However, the diameter of this barrier material is not only large enough to cover the mouth of the tube, but also the material is selected from a material that inherently retains fragrance and is impermeable to oxygen, etc. Therefore, it is most preferable as a material for shielding the opening of the tube, and it goes without saying that it has good heat-sealing properties for the opening of the tube.

(Means for Solving the Problems) Under such circumstances, the present invention aims at reducing costs and perfecting the integrity of heat sealing, particularly in the field of laminated tubes. As a result of our research, we found that the idea was to use the scraps of the barrier material produced during the manufacturing process of the laminate tube mentioned above as a blind lid for the opening, and specifically, the shoulder and extrusion port were integrally molded. In the process of manufacturing a laminated tube by joining the shoulder part with a barrier material to the opening of the tube body, which is formed into a cylindrical shape, an extrusion hole is formed in the center to insert the annular barrier material. and a step of forming a blind lid by drawing the scraps of the barrier material generated when punching out the extrusion outlet insertion hole into a dish shape to match the opening shape of the extrusion outlet, and forming a blind lid. Apply barrier material to the outer circumferential surface of the shoulder part of the shoulder part.
The present invention also relates to a method for manufacturing an extruded laminate tube with a blind lid, characterized in that the blind lids are integrally attached to the openings of the extrusion ports.

(Function) However, with the above-described configuration of the present invention, material costs can be reduced because the blind lid is formed using scraps of the barrier material that is attached to the shoulder, and various equipment can be simplified and the number of man-hours can be reduced. In addition, since the dish-shaped blind lid is fitted into the opening of the extrusion port, positioning is accurate and easy. There will be no misalignment, and so-called blind defects can be prevented as much as possible.
The total manufacturing cost of the laminate tube can be reduced.

(Example) The specific content of the present invention will be explained below based on the embodiment of the drawings. 1 is a collapsible laminate tube body, and a shoulder part 1A is connected to the opening of the tube body 1. ing.

The shoulder part 1A includes a base 1C having approximately the same diameter as the laminate tube body 1, a shoulder 2 whose diameter gradually decreases from the base 1C, and an extrusion port 3 connected to the side where the diameter of the shoulder 2 is reduced. It consists of

The opening edge 1B of the extrusion port 3 is formed to be substantially flat, and a threaded portion 4 is provided on the outer peripheral wall surface.

Furthermore, 5 indicates a barrier material fused to the outer circumferential surface of the shoulder portion 2, and the barrier material 5 is an element sheet made of a material that has excellent fragrance retention and impermeability to oxygen, etc. A barrier material that is circular and has a hole approximately equal to or slightly larger in diameter than the extrusion port 3 (a hole to avoid the extrusion port 3) is punched in the center so that the entire barrier material has a donut shape. After forming, it is further drawn into a shape that substantially overlaps and matches the shoulder part 2 using a drawing die, and is integrated into the outer circumferential surface of the shoulder 2 by heat sealing when the tube body 1 and the shoulder part 1A are engaged. It is fused to.

Furthermore, 6 indicates a blind lid for sealing the opening of the extrusion port 3. The material of the blind lid 6 is exactly the same as that of the barrier material 5, which is formed when a hole is punched in the center to avoid contact with the extrusion port 3 during the process of molding the barrier material 5.
Use Nukikasu.

This scrap has a diameter that is equal to or somewhat larger than the diameter of the extrusion port 3 described above, and is therefore large enough to seal the opening of the extrusion port 3.

The scraps generated during the molding process of the barrier material 5 are drawn into a dish shape to match the opening shape of the tube extrusion port 3 to form a blind lid 6 having a flange 6A at the periphery. After drying the convex portion inward of the extrusion port 3, the peripheral flange 6A is attached to the flat opening edge 1B of the extrusion port 3.
They are superimposed and sealed together by heat sealing or high frequency sealing.

At this time, if you seal the blank with the aluminum foil layer side facing up, the adhesion between the resin layer side on the back side and the resin at the extrusion port will be good, and when the blind lid is opened, the metal layer will be on the front side. This makes it easy to open the cap, and even after opening the cap with a protruding point, there is no chance of the broken pieces turning outward when pushing out the contents. .

(Effects of the Invention) As described above, the present invention is advantageous because the scum that is inevitably generated during the molding process of the barrier material itself has good fragrance retention properties and impermeability to oxygen, etc. for the contents of the tube. , we focused on the fact that the material has a desirable function as a material for blind lids as it is, and planned to collect it and use it as a blind lid for the extrusion outlet, and we designed it with an extrusion outlet insertion hole in the center. A step of forming a hole to form an annular barrier material, and further a step of drawing the scrap of the barrier material produced when punching out the extrusion outlet insertion hole into a dish shape to match the opening shape of the extrusion outlet and blinding it. First, since the barrier material is integrally attached to the outer peripheral surface of the shoulder part of the shoulder part and the blind cover is integrally attached to the opening of the extrusion port, The manufacturing process is simplified as there is no need to procure materials and process lines to manufacture the blind lid in addition to manufacturing the barrier material, which was previously thought of in the case of laminated tubes with blind lids. It is possible to streamline the production of laminated tubes with blind lids, and in addition, it is possible to attach blind lids at an extremely low cost, which has been an unavoidable factor in the production cost increase in the field of laminate extrusion tubes. .

Second, not only the main body and shoulder of the laminate tube but also the opening of the extrusion port are coated with a barrier material, which not only provides excellent virginity but also provides sufficient protection against the contents of the tube. It has aroma retention properties and is impermeable to oxygen, etc., and can prevent the contents from deteriorating.

Thirdly, since the blind lid is constructed by drawing the scraps of the barrier material into a dish shape to match the opening shape of the tube extrusion opening, when manufacturing the tube, the central convex part is drawn inside the extrusion opening. When sealing the tube in one piece after fitting it toward the other side, it becomes easy to align the above-mentioned blank and the tube extrusion opening, and the blind lid can be placed on the opening edge of the extrusion outlet. Even when the lid is transported to the sealing process, it is possible to prevent the lid from accidentally falling off.

In addition to preventing the formation of wrinkles, the opening of the lid is improved, and it also improves the appearance by preventing the opened fragments from turning outward when extruding the contents after opening the lid. It has various beneficial effects such as improved health.

[Brief explanation of drawings]

The figure is an enlarged vertical sectional view of the main part of an extruded tube with a blind lid, which is an embodiment of the present invention. 1...Tube body, 1A...Shoulder parts, 1B...Opening edge, 1C...Base, 2...
Shoulder part, 3...Extrusion port, 4...Screw part, 5...Barrier material, 6...Blind lid.

Claims (1)

[Claims] 1. In the process of manufacturing a laminated tube by joining the shoulder part, which has a shoulder part and an extrusion port integrally molded, to the opening of the tube body, which is formed into a cylindrical shape using a laminated material with barrier properties, an extrusion port insertion hole is formed in the center. forming an annular barrier material, and further drawing the scraps of the barrier material generated when punching out the extrusion outlet insertion hole into a dish shape to match the opening shape of the extrusion outlet to form a blind lid. The blind lid is characterized in that the barrier material is integrally applied to the outer peripheral surface of the shoulder part of the shoulder part, and the blind lid is integrally applied to the opening of the extrusion port. Method of manufacturing extruded laminate tubes.