JPH05246447A - Manufacture of twin tube container - Google Patents

Abstract

PURPOSE:To manufacture a twin tube container easily and inexpensively without requiring an outer cylindrical container by a method wherein a head part is fitted on the top of two tube bodies for storage which are put back to back, and at the same time, the bottoms of these containers are fixed to each other. CONSTITUTION:A twin tube container 15 has two storage chambers 9, 10, respective openings 5 of which are adjacent, and respective contents in them can be pushed out at the same time. In manufacturing, a first tube body l is set first on a content filling line with the top opening 5 facing up, and a first content 13 is filled from the first opening 5. Also, a second content 14 is filled in a second tube body 2 in the same manner. Then, respective back parts 7 of both tube bodies 1, 2 are put together, and a head part 3 is screwed on threaded parts 6 of these tube bodies, and at the same time, a cap 4 is clamped on the head part 3. Then, respective bottom parts 8 of both tube bodies 1, 2 are heat-welded 16 to form an integrated tube container which is equipped with respective chambers 9, 10 and push-out ports 11, 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to cosmetics, adhesives, etc. in which two components having different colors and properties are separately stored and mixed at the time of use (the properties of each component are paste, cream, Gel, etc.) are filled independently,
The present invention relates to a method of manufacturing a twin-tube container that can be stored.

[0002]

2. Description of the Related Art A twin-tube container as described above has two storage chambers, and normally, different components (mixing of the components causes chemical reaction or instability) when the storage chambers have different storage chambers. Etc.),
It is for putting in what is extruded and mixed at the time of use. Further, by using a twin tube container, it is possible to simultaneously extrude two components having different color tones, and using such a method can enhance the commercial value in terms of color sense.

Conventionally, as a method for producing such a twin tube container, for example, Japanese Utility Model Publication No. 58-12743, Japanese Utility Model Publication No. 58-116555, and Japanese Utility Model Publication No. 61-3 is used.
The methods described in Japanese Patent No. 5154 and Japanese Utility Model Laid-Open No. 61-90739 are known. In any of these twin-tube container manufacturing methods, after forming two independent chambers with two tubes, two types are used from the two extrusion ports on the container head side or the two openings before sealing on the container butt side. The method of simultaneously filling the contents of

[0004]

However, the conventional method for manufacturing a twin tube container as described above has the following problems. (1) In the case of simultaneous filling of extrusion ports, the positional relationship of the extrusion ports is fixed, but since the two extrusion ports are very close to each other, two types of contents are near the extrusion port when filling the contents. Therefore, it is easy to mix, and since the opening area of the extrusion port is small, it takes a long time for the filling work. (2) In the case of simultaneous filling of the tail side opening, although the opening area is wide and the filling can be performed for a short time, it is difficult to determine the shape of the opening and the positional relationship of the inner container with respect to the outer container. The contents may overflow, a part may be mixed, or two kinds of contents to be divided and filled may be filled in only one chamber in a mixed state. Further, due to the abnormal filling, the body near the opening of the bottom of each container is contaminated with the contents, resulting in defective welding of the ends and leakage of the contents. (3) The stability is improved by separately storing the two types of contents, but the economical efficiency is extremely deteriorated due to the complicated workability at the time of filling and the increased cost due to the complicated container.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that if the method of fitting the body portion of the twin tube body and the head portion is used, They have found that the contents can be easily filled prior to mating and have arrived at the present invention. That is, the present invention has two storage chambers adjacent to each other in the opening, and in the method of manufacturing a twin-tube container capable of simultaneously pushing out the contents of the storage chambers, the backs of the two storage tube bodies are aligned with each other. A method for producing a twin-tube container, characterized in that the upper part is fitted to a head part, and the lower parts of the two tube bodies are fixed.

[0006]

EXAMPLES The method of the present invention, including the production of members, comprises the following steps.

(1) Manufacturing process of storage tube body and head part (and cap) Usually, since the twin tube container is provided with a cap, it is preferable to manufacture the cap together.

(2) Assembly Step (2-1) Fitting Step Each storage tube body may be filled with contents in advance.
Filling the head parts before fitting has an advantage that the contents can be filled more easily than the wide mouth.

(2-2) (Cap Closing and) Lower Part Fixing Step Usually, after fitting, the lower parts of the two tube bodies are fixed and integrated. When filling the contents in the item (2-1), it is better to tighten the cap before fixing the lower part in order to prevent the contents from being pushed out.

Each step will be described below with reference to FIGS. 1 to 5 showing an embodiment of the present invention. In the following method, an example of manufacturing a container filled with contents and having a cap will be described.

(1) Manufacturing process of housing tube body, head part and cap FIG. 1 is a perspective view showing an embodiment of the housing tube body. In FIG. 1, 1 is a first tube body and 2 is a second tube body. Both have the same shape and size, but when the filling amounts of the respective contents are different, the shapes and sizes may be different from each other as long as they can be integrated by the method of the present invention. Both tubes are made of blow-molded thermoplastic resin such as polyethylene, polypropylene, soft vinyl chloride, ethylene-propylene copolymer, polybutadiene resin, etc. by a single layer structure, or ethylene-vinyl acetate copolymer is used as a barrier material for these resins. It is manufactured by blow molding with a coextrusion composite structure in which a combined saponified product, nylon, vinylidene chloride, acrylonitrile resin, etc. are combined. Further, decoration processing such as offset printing, screen printing, thermal transfer printing, hot stapping processing, and painting may be applied to the outer surfaces of both containers in order to display the product, decorate, or improve the ability to protect the contents. Further, a label subjected to printing or hot stapping may be attached, or a heat shrinkable film may be used as the label.

FIG. 2 is a perspective view showing a head part, and FIG. 3 is a partially cutaway perspective view showing an embodiment of a cap. These are produced by an injection molding method using a thermoplastic resin such as polyethylene, polypropylene, ethylene-propylene copolymer, ABS or polystyrene. The outer surfaces of the head part 3 and the cap 4 may be further subjected to decoration processing such as coloring and plating.

(2) Assembling process (2-1) Fitting process The upper opening 5 of the first tube body (1 in FIG. 1) is set on the contents filling line with the upper opening 5 facing upward, and the upper opening 5 is opened by the filling nozzle. Fill the first contents from. Similarly, the second tube body (2 in FIG. 1) is filled with the second content. The filling amount of both tube bodies is preferably up to the upper end of the threaded portion 6 of the tube body. The back portions 7 of the tube bodies (FIG. 1) filled with the contents are aligned with each other, and the head part 3 (FIG. 2) is screwed into the threaded portion 6 of the tube body by the reverse screw method. This completes the fitting at the top of both tube bodies. As a method of fitting the head part 3 (FIG. 2), in addition to the screw type of the present embodiment, fitting, adhesion or the like can be applied.

(2-2) Cap Tightening and Lower Part Fixing Step As described above, both tube bodies (FIG. 1) filled with contents are fitted with the head part 3 (FIG. 2), and then the cap 4 (FIG. 3) Cap the head part 3 (Fig. 2) on the cap. Next, the lower parts 8 of both tube bodies (FIG. 1) are fixed to each other by a heat welding method to form an integrated tube container having two chambers. As a method for fixing the lower portions 8 of both tube bodies (FIG. 1) to each other, sandwiching by a clip or the like, adhesion, etc. can be applied in addition to the heat welding method.

In this way, the twin tube container according to the present invention can be obtained. FIG. 4 is a partially cutaway perspective view showing an embodiment of the twin tube container according to the present invention. In FIG. 4, 3 is a head part, 4 is a cap, 9 is a first storage chamber, 1
0 is the second storage chamber, 11 is the first extrusion port, 12 is the second extrusion port, 13 is the first content, 14 is the second content, 15
Is a body part of the tube container, and 16 is a fixed part. FIG. 5 is FIG.
It is a longitudinal cross-sectional view taken along the line I-I. In FIG. 5, 3 is a head part, 4 is a cap, 11 to 16 are the same as in FIG.
Is a head part fitting part.

(3) Method of Use When the cap 4 of the twin tube container of the present invention shown in FIG. 4 is removed and the tube container body 15 is crushed, the first contents 13 are removed from the first storage chamber 9 through the first extrusion port 11. ,
The second contents 14 are each squeezed out from the second storage chamber 10 through the second extrusion port 12 into a semi-cylindrical shape, and immediately after squeezing out, a single cylindrical shape is formed. In order to squeeze out the two contents more uniformly, and in order to prevent unsqueezed residue from occurring, for example, a tube squeezer can be used.

[0017]

As described above, according to the method of manufacturing the twin tube container of the present invention, the backs of the two storage tube bodies are aligned with each other and the upper parts are fitted to the head parts, and the two tube bodies are fitted together. In order to integrate the independent storage chamber, since the lower part of the tube body is fixed,
For example, since an outer cylinder container is not required, the container can be simplified and can be manufactured at low cost. Furthermore, the conventional filling method can be used for a short time from the upper part of the storage chamber having a large opening area. Also,
Since they are joined and integrated after being filled in the respective storage chambers, the respective contents can be surely stored in an independent state without being mixed. Therefore, according to the method of the present invention, it is possible to efficiently and inexpensively and reliably manufacture a twin-tube container which is independently filled and stored by using the existing filling line.

[Brief description of drawings]

FIG. 1 is a perspective view showing a storage tube body according to the present invention.

FIG. 2 is a partially cutaway perspective view showing a head part.

FIG. 3 is a partially cutaway perspective view showing a cap.

FIG. 4 is a partially cutaway perspective view showing a twin tube container according to the present invention.

5 is a cross-sectional view taken along the line I-I of FIG.

[Explanation of symbols]

 1 1st tube body 2 2nd tube body 3 Head part 4 Cap 5 Tube body upper part opening 6 Tube body screw part 7 Tube body back part 8 Tube body lower part 9 1st storage room 10 2nd storage room 11 1st extrusion Mouth 12 Second extrusion port 13 First contents 14 Second contents 15 Tube container body 16 Sticking part 17 Head part fitting part

Claims (2)

[Claims] 1. An opening has two storage chambers adjacent to each other,
In a method of manufacturing a twin tube container capable of simultaneously pushing out the contents of each storage chamber, the backs of two storage tube bodies are aligned with each other and the upper parts are fitted with head parts, and the two tube bodies are fitted together. A method of manufacturing a twin-tube container, characterized in that the lower part of the container is fixed. 2. The manufacturing method according to claim 1, wherein after filling the contents in the two tube bodies, the upper parts are fitted with the head parts.