JPS5828967Y2 - Composite container with spout - Google Patents

Description

[Detailed description of the invention] The present invention is a composite container made of a combination of synthetic resin and paperboard, that is, a blank plate made of sheet-like material is fed into an injection mold, and the edges of the blank plate are molded with injection molding resin. This invention relates to improvements in bonded composite containers.

In general, when considering the long distribution period of a paper-based container with an easy-open mechanism filled with liquid, the functions required of the container include (a) high barrier properties, and (b) non-permeability of liquids. Is required.

Therefore, if the end surface of the paper is exposed inside the container, it is impossible to use it for that purpose.

However, the opening of a conventional paper-based container is formed by punching an opening into the blank plate, or is made of a laminated material of paper, plastic film, and/or aluminum foil attached to the opening. In many cases, the pull tab is peeled off to open and pour out, and the edge of the paper is exposed, making it unsuitable for long-term distribution.

On the other hand, a film or aluminum foil is pasted on the inner side,
There are containers on the market that prevent the edges of the paper from being exposed, but these do not open even if the tab is peeled off and must be broken open with a straw or the like, and the manufacturing process is also complicated. .

The present invention has been devised in view of the above points, and provides a high-barrier container for long-term room-temperature distribution of liquids, powders, etc., which is provided with an easily openable spout.

That is, in a composite container made by supplying a blank plate to an injection molding die and joining the edges of the blank plate with injection molding resin, a part of the blank plate is cut out or punched to form a spout, and the injection port is formed by cutting out or punching out a part of the blank plate. Either provide a thin wall part of an arbitrary shape in the molded resin part that will serve as the outlet, or set a part that should be a spout in a part of the resin plate where there is no blank plate, provide a thin wall part of an arbitrary shape there, and surround it with the thin wall part. This is a composite container with a spout formed so that the spout opens by pressing down on the lowered part.

The embodiments shown in the drawings will be described below.

Composite containers made of a combination of synthetic resin and paperboard are first printed on base paper and then laminated on its surface. After that, blanks are punched out to match the shape of the container (circular, square, polygonal, etc.), and this is injected. The synthetic resin is supplied to a molding die and sandwiched between a male die and a female die, and a synthetic resin is injected into the mold hole formed by the blank and the die to form the blank, and then the mold is opened to take out the product.

The following types of base paper are used depending on the contents:

For example, from the outside to the inside, PP (polypropylene)/
Paper/PE (polyethylene)/Al (aluminum)/P
P or PE/Paper/PE/AI/PE or PE/Paper/PE
This is laminated paper such as

Figure 1 shows an example of the base paper, which is sandwiched between paper 2 and laminated with either PE or CCPI, 4, on the inner and outer surfaces, or with AI foil 3, etc., depending on the barrier properties required for the container. Laminate the film.

Using this base paper 5, a blank consisting of a closed end piece 6 and a semicircular side piece 7 connected thereto via a connecting part 8 is punched out.

During this punching, a spout 9 is punched out in the closed end piece 6.

At this time, the notch 10 is also punched out at the same time.

The blank plate 5 produced as described above is inserted into an injection mold, and the rope pieces 7, 7, the open end flange portion 11, and spout 9, which are the blank plate joints, are injection molded and integrated.

In this case, the injection molding resin 12 is a resin that can be thermally bonded to the film on the inner surface of the blank.

The structure of the injection molded resin 12a at the spout part consists of a protrusion 13ξ thin wall part 14, a rising part 15 for preventing return, and a wedge-shaped projection part 16. Since the spout is triangular, the outer periphery has a triangular thin wall part 17. It is formed.

The above structure is integrally molded with the injection molded resin of the blank joint.

In addition, a plurality of protrusions are formed on the surfaces of the protrusion 13 and the rising n portion 15 for preventing return.

The contents are filled from the open end of the container made as described above, and the open end is made of a suitable material and a sealable lid 18 is attached to the container body by an appropriate method such as heat sealing or ultrasonic sealing. Seal the container.

To open the spout, first, the projection 13 is broken in the direction of the imaginary line in FIG. 6 using the thin wall portion 17, and then the whole is broken in the direction of the arrow B as shown in the imaginary line in FIG.

At this time, the base portion of the rising portion 15 is not torn.

Further, the thin wall portion 14 has the function of bending upward when pushing the open resin piece inside, thereby eliminating resistance.

In some cases, a portion to be used as a spout is set in a portion of the resin plate where the blank plate does not exist, and a thin-walled portion of an arbitrary shape is provided there to open the spout.

Figure 7 shows this.

The container made as described above has a high barrier and can be opened easily, and since the opening is integrally formed when forming the composite container, the cost is also low.

Furthermore, unlike the pull top of a general metal can, the opening piece does not separate from the container body when opened, which is advantageous in terms of garbage disposal.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the base paper, Figure 2 is a developed view of the blank board, Figure 3 is a slope view of the proposed container, Figure 4 is a plan view of the proposed container, and Figure 5 is a partial cross-section of the proposed container. Fig. 6 is a partial cross-sectional view for explaining the opening operation of the spout, and Fig. 7 is a cross-sectional view of an embodiment different from that in Fig. 5. 6... Closed end piece, 7...
...Rope piece, 8...Connection part, 9...
Pour spout, 12... Molding resin, 13...
Protrusion, 14...Thin wall part, 15...Return prevention rising part, 16...Protrusion, 17...
...Thin wall part.

Claims (1)

[Scope of utility model registration request] In a composite container made by supplying a blank plate to an injection mold and joining the edges of the blank plate with injection molding resin, a spout is formed by cutting or punching a part of the blank plate, and A thin wall part of an arbitrary shape is provided in the molded resin part that will serve as a spout, or a part of the resin plate where there is no blank plate is set as a spout and a thin wall part of an arbitrary shape is provided there. A spout with a spout formed by forming a protrusion at the tip of the surrounded part, providing a rising part at the part that contacts the thin part of the part surrounded by the thin part, and forming this part apart from the protrusion. Composite container.