JP2853428B2 - Integrally molded structures such as packaging members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an integrally molded structure such as a packaging member in which a plurality of independent hollow portions are provided at the bottom of a bottomed container or inside four side plates.

[0002]

2. Description of the Related Art Conventionally, as a structure of a packaging member of an electric product such as a VTR or a television receiver or other general products, a foamed resin member formed by injection molding into a predetermined shape, for example, a foamed styrene resin member or a paper sheet member is used. What is formed is used.

[0003]

However, in the above-mentioned structure, in the case of a styrofoam resin member or the like, it is difficult to dispose after use, and there is a problem of pollution and environmental destruction. We also want to reduce the amount of components used to further reduce costs. In the case of a paper sheet, assembling man-hours are required, and when the sheet thickness is small, there is a problem that the sheet is likely to be warped and twisted. SUMMARY OF THE INVENTION In view of the above problems, the present invention improves the strength of a structure by means of injection molding or the like, reduces shape distortion such as warpage and torsion, and is easy to dispose of, and has a pollution-free and highly productive configuration. A member is provided.

[0004]

In order to solve the above-mentioned problems, an integrally molded structure such as a packaging member of the present invention is formed by applying a hollow injection molding technique to the bottom of a bottomed container or the inside of a side plate surrounded by an X-shape. An integrated structure in which a plurality of independent hollow portions are disposed in a predetermined manner via a partition plate (partition wall) that intersects in a cross shape, a cross shape, or a T shape. Formed by one shot molding (single molding). That is, a pair of hollow injection molds in which one mold is slidably fitted with the other mold are prepared, and the pair of mold cavities are enlarged to form a hollow molded product. A plurality of partition plates are assembled so as to be able to move in and out of the mold on the sliding side so as to form a partition crossing in a letter shape, a cross shape or a T shape.

[0005] 2. Injection molding each half by primary molding with one molding die, and then slide the injection molding dies molded with each half on the fixed side and the movable side to perform secondary molding. Thereby, the respective halves are joined by a secondary molding resin member to be integrally molded.

More specifically, as shown in FIGS. 3 to 7, the hollow structural plate 300 is formed by forming two hollow structural plate halves 301 and 302 formed by primary molding into a secondary molded resin member (not shown).
And hollow portions 303 and 304 which are independent inside.
Are arranged in an aligned state. Each half 301, 302
A groove 307 for introducing and filling the secondary molding resin member and connecting the halves to each other is formed in the partition wall 305, and the stepped concave portion 3
Reference numerals 06 are arranged at predetermined positions around the end face. The procedure of the primary molding and the secondary molding is as described above. The above 2
The two injection moldings are constituted by the injection molding method alone or the combination of the injection molding method and the blow molding method of blowing nitrogen gas or the like.

[0007] The injection molding member used is a member obtained by kneading gluten of natural protein contained in flour and an alcoholic solution, a member obtained by kneading corn flour and water, or an adhesive such as paper and starch paste. Is kneaded.

[0008]

According to the present invention, with the above-described structure, it is possible to produce with high productivity, reduce the amount of resin material used, improve the strength of the packaging member, reduce shape distortion such as warpage and twist, and simplify disposal processing. An object of the present invention is to provide a packaging member or the like that is pollution-free and has a configuration excellent in design and productivity.

[0009]

1 and 2 show an embodiment of the present invention.
This will be described with reference to the drawings shown in FIG. FIG. 1 is a cross-sectional view from the side of a bottomed container showing a packaging member according to an embodiment of the present invention, and FIG. 2 is a plan view of FIG. 1 as viewed from the directions of arrows S to S. The integrated molding structure such as the packaging member of the present invention is formed by applying a hollow injection molding technique and incorporating a plurality of independent hollow portions inside a bottom portion or a side plate through a cross plate (partition wall) crossing in a cross shape. Since the structure is integrally molded by one molding die or injection molded by one molding, there is no need to join or assemble parts. Of course, the injection molding method and the blow molding method may be used in combination as needed. 1 and 2 show an example of a packaging member having a configuration in which an electric product, for example, a video tape recorder (VTR) is sandwiched between two box-shaped bottomed containers 1 from above and below. The parts 2 are symmetrically arranged at four places via intersecting partition plates, that is, intersecting partition walls 7. A plurality of predetermined independent hollow portions 3 and 4 are provided inside the four surrounding side plates in a symmetrical or aligned state with partition walls 7 interposed therebetween. Further, in the embodiment of the present invention, the skin thickness of the bottom portion 5 or the side plate is not made constant, and the thickness and the size of the hollow portion are set in a predetermined manner depending on the site. For example, in the bottom portion 5, the hollow portion 2 is sandwiched, and the skin thickness T1 on the side where a load is applied is configured to be larger than the thickness T2 on the opposite side by a predetermined amount, thereby preventing warpage and twisting. Furthermore, the total volume occupied by the hollow portion is set to 20 times the volume occupied by the outer shape of the packaging member 10.
% To 90%. The total volume occupied by the hollow portions may be determined according to the purpose of use, the required strength, and the material (eg, resin, paper, etc.) of the packaging member. By arranging a plurality of hollow portions in the bottom portion or all of the side plates or inside unnecessary portions, rigidity is ensured and shape distortion is prevented. The packaging member according to the embodiment of the present invention is formed by molding and firing a decomposable plastic member, for example, a corn powder and water as a binder, and kneading the mixture into a predetermined shape,
Or it utilizes gluten, a natural protein contained in flour, and adds an alcoholic solution to gluten and pressurizes and heats it to mold, that is, compression molding or injection molding or blow molding to obtain a desired shape. is there. Alternatively, a member obtained by kneading paper and a paste (for example, an adhesive such as starch) is injected or pressed and molded. Corn powder moldings are easily broken by human hands and easily decomposed by water or soil bacteria. Therefore, the molded product is used after being subjected to a surface treatment such as a water-resistant treatment or a heat-resistant coating. When wheat gluten is used, it is easily decomposed by water or soil bacteria, so that disposal is simple and pollution-free, as in the case of the above-mentioned corn powder molded product. When discarding a used packaging member, the member is broken into a plurality of pieces, and then decomposed with water, incinerated, or buried in soil, thereby easily treating without causing pollution and preventing environmental destruction.

As described above, according to the embodiment of the present invention, the packaging member has a substantially two-layer structure, and the hollow portions independent between the layers are arranged in a symmetrical or aligned manner via a partition to increase rigidity. Significant improvement and reduction of materials used. as a result,
The weight can be reduced. Furthermore, by setting the size and the shape of the hollow portion to be provided in a predetermined manner, the required mechanical strength can be obtained as desired by changing the value for each portion of the integrated structural member. Further, the position of the hollow portion provided on the bottom or the side plate is shifted from the center of the thickness of the component members, and the thickness of the skin is made uneven, so that the material used can be reduced and the rigidity can be improved. In the above embodiment, an example of the packaging member having a box-shaped appearance has been described.However, the packaging member may have any external shape such as a circular bottomed container or a flat plate without being limited to the box shape. Needless to say. Further, it is also the same that a microcapsule containing a fragrance may be coated on the surface of the packaging member or mixed into an injection material at the time of injection molding to form a fragrant packaging member.

[0011]

As described above, according to the packaging member of the present invention, disposal is simple, pollution-free, and prevents environmental destruction.
By forming the packaging member in a substantially two-layer structure and arranging the hollow portions independent of each other between the layers in a symmetrical or aligned state via intersecting partitions, the rigidity can be improved and the material used can be reduced. As a result, the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a packaging member according to an embodiment of the present invention.

FIG. 2 is a plan view of FIG. 1 as viewed from the direction of cutting lines S to S;

FIG. 3 is a plan view of a hollow structural plate used for explaining a forming means of the embodiment of the present invention.

FIG. 4 is a front view of a hollow structural plate used for describing a forming means according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view from the side of a procedure for forming a hollow structural plate used in the description of the embodiment of the present invention.

FIG. 6 is a plan view of a half plate having a hollow structure used for explaining the embodiment of the present invention.

FIG. 7 is a front sectional view of a hollow structural plate half used for explaining the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 low / low container 2, 3, 4 hollow portion 5 bottom portion 6 electric product 7 partition wall 300 hollow structure plate 301 hollow structure plate half 302 hollow structure plate half 303 hollow portion 304 hollow portion 305 partition wall 306 stepped concave portion 307 groove

──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuhiko Kodama 1006 Kadoma Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-52-130788 (JP, A) JP-A-47-38395 (JP, A) Jiko 50-16843 (JP, Y1) (58) Fields investigated (Int. ⁶ , DB name) B65D 81/113 B65D 1/00 B65D 1/22

Claims (3)

(57) [Claims] [Claim 1] consists of gluten member of the natural protein, Yes
A plurality of hollow portions independent through the partition wall in the interior of the bottom container one
An integrated molded structure of packaging members arranged by injection molding . 2. A natural protein gluten and solution kneaded member or corn flour, water, and a kneaded member, or
Or from one of the members obtained by kneading paper and adhesive.
X-shaped or inside the bottom of the bottomed container or inside the surrounding side plate.
, A plurality of partition plates are inserted into a mold as if a plurality of independent hollow portions were formed via a partition crossing in a cross or T shape .
A method for producing a packaging member, which is formed by one-shot injection molding of an integrated structure which is moved into and out of a container. 3. A mixture of natural protein gluten and a solution.
Components or components obtained by kneading corn flour and water,
Or from one of the members obtained by kneading paper and adhesive.
X-shaped or inside the bottom of the bottomed container or inside the surrounding side plate.
Are separated through a cross-shaped or T-shaped partition
As a result of forming several hollows, the primary
Each half is injection molded by molding and then each half is molded.
The injection mold with the molded body is fixed and movable.
To each other by sliding and
Manufacture of packaging members that are joined by secondary molding members to form an integrated structure
Construction method.