JP2000093278A - Tableware and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate adverse effect of harmful substances, improve mechanical strength, make tableware thin, and improve design by joining a metallic inner vessel with an outer vessel which covers its outer side and is made of a synthetic resin and bending an end fringe part of an opening of the inner vessel outward to embed it into a synthetic resin layer of the outer vessel. SOLUTION: Tableware means, for example, a bowl, which is composed of a bowl main body 1 and a lid 2. The bowl main body 1 is constituted by making an inner vessel 3 and an outer vessel 4 adhere closely and mutually and joining them integrally. Moreover, the inner vessel 3 is molded like a bowl using a metal plate, and an end fringe part of its opening is folded back outward to from a winding in type folding back part 5. The outer vessel 4 is molded by a thermoplastic resin and thermosetting resin so as to cover an outer side of the inner vessel 3, and a yarn bottom 6 is arranged in a bottom part thereof. When the inner vessel 3 and the outer vessel 4 are joined mutually, the folding in part 5 bites a synthetic resin layer of the outer vessel 4 in the end fringe part of the opening of the inner vessel 3 and is embedded therein. Consequently, it is possible to obtain such tableware that prevents toxic substances from oozing out, has excellent mechanical strength, can be made thin, and can improve the design property.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to tableware such as bowls and dishes made of metal and synthetic resin, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, tableware made of melamine resin, polycarbonate resin, polypropylene resin and the like has been used for school lunches and the like, and tableware made of polypropylene resin and the like for hospitals and the like has been used for school meals. It is being used. However, in such synthetic resin tableware, trace amounts of harmful substances such as formaldehyde and hormone-like substances may be extracted from the resin material used, which is a major social problem in terms of safety and the like. I have.

For this reason, there has been proposed a tableware in which the inner container in contact with the contents is made of metal such as stainless steel, the outer container is made of synthetic resin, and both are joined by an edge. The tableware also has a double hollow structure, which makes it thick and bulky, making it not beautiful in design, and it is not possible to firmly join the inner container and the outer container. When performing automatic cleaning with, the air inside expands and deforms, gaps occur at the joints during use, water enters, and the mechanical strength decreases, making it difficult to handle, There was a problem that concerns remained.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a tableware such as a bowl or a plate which is not affected by harmful substances, has a high mechanical strength, can be made thin, and has a beautiful design. Is to get

[0005]

The object of the present invention is to provide a metal inner container and a synthetic resin outer container which covers the outer surface of the inner container in a tightly and integrally joined manner. The problem can be solved by adopting a structure in which the structure is folded into the synthetic resin layer of the outer container. In addition, when the opening edge of the inner container is positioned lower than the opening edge of the outer container, the lip is not burned when eating and drinking hot contents. further,
If a step is formed at the position of the opening edge of the inner container, it serves as a seat for the lid.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
1 to 4 show an example of the tableware of the present invention.
This example is a bowl such as a rice bowl or a soup bowl, and is composed of a bowl body 1 and a lid 2. The bowl main body 1 has an inner container 3 and an outer container 4 which are closely attached and integrally joined. The inner container 3 has a bowl shape made of a metal plate such as stainless steel or an aluminum alloy having a thickness of 0.1 to 0.5 mm. It is folded over and turned back to form a folded part 5 in a roll-up shape. The depth of the inner container 3 is such that when the bowl main body 1 is filled with contents such as rice and juice, the contents do not overflow.

The outer container 4 is made of a thermoplastic resin such as ABS resin, polypropylene resin or polycarbonate resin or a thermosetting resin such as melamine resin or phenol resin, and is formed so as to cover the outside of the inner container 3. And the thickness is about 1 to 5 mm. A thread bottom 6 is provided at the bottom of the outer container 4. It is desirable that an inorganic filler such as calcium carbonate is blended in the synthetic resin constituting the outer container 4 so that the coefficient of thermal expansion of the resin is close to the coefficient of thermal expansion of the metal constituting the inner container 3.

The inner container 3 and the outer container 4 are in close contact and integrated with each other, and especially at the opening edge of the inner container 3, as shown in FIG. Embedded in the synthetic resin layer. In addition, a step is formed at the position of the folded portion 5 of the inner container 3, and the outer container 4 in a portion above this is slightly thinned. This step serves as a receiving seat for receiving the lid 2.

As shown in FIGS. 3 and 4, the lid 2 also has a metal inner container 7 and a synthetic resin outer container 8 which covers the outside of the inner container 7 in the same manner as the bowl body 1, and is integrally joined. The material constituting the inner container 7 and the outer container 8 is the same as that of the bowl main body 1. In addition, the opening edge of the inner container 7 is folded outward to form a wrap-around folded portion 9, which is buried in the synthetic resin layer of the outer container 8. The points are the same as those of the bowl body 1. However, the positions of the opening edge of the inner container 7 and the opening edge of the outer container 8 coincide with each other, and are the opening edge of the lid 2.

The manufacture of the bowl body 1 and the lid 2 is as follows.
This is performed as follows. First, a metal plate to be the inner containers 3 and 7 is formed into a shape shown in the drawing by press working. At the time of this molding, it is needless to say that the opening edge portions are folded to form the folded portions 5 and 9. Next, the inner containers 3 and 7 are set at predetermined positions in the cavity of the resin molding die, and the resin is filled in the die, and the outer containers 4 and 8 are molded.

This molding can be carried out by an injection molding method when the synthetic resin constituting the outer containers 4 and 8 is a thermoplastic resin, or by a transfer molding method when the synthetic resin is a thermosetting resin. Thereby, the inner containers 3, 7 and the outer containers 4, 8 are brought into close contact with each other and integrated, and the folded portions 5, 9 of the inner containers 3, 7 are embedded in the synthetic resin layers of the outer containers 4, 8. .

In the tableware having such a structure, since the inner container 3 which is in contact with the contents such as juice is made of metal such as stainless steel, harmful substances are not extracted and it is safe. In addition, the folded portions 5 at the opening edges of the inner containers 3, 7
9 is buried and buried in the synthetic resin layers of the outer containers 4 and 8, so that the inner containers 3 and 7 and the outer containers 4 and 8 are firmly connected and integrated. It does not peel or break even if it is repeatedly received.

Further, since the tableware itself is made of a composite material of a metal and a synthetic resin, the mechanical strength is high, the thickness can be reduced, and a beautiful design can be achieved. In addition, the heat retention becomes sufficiently high for practical use, which is comparable to the heat retention of the conventional double structure type tableware. Furthermore, in the bowl main body 1, since the opening edge of the inner container 3 is located at a lower position below the opening edge of the outer container 4, there is a risk that the lips may be burned when filled with hot contents. Absent.

FIG. 5 shows a modification of the bowl body 1.
In this example, a step for receiving the lid 2 is formed slightly above the opening edge of the inner container 3, and the folded portion 5 of the inner container 3 is completely embedded in the synthetic resin layer of the outer container 4. ing. For this reason, in this bowl main body 1, the coupling force between the inner container 3 and the outer container 4 is further increased. Further, as shown in FIG. 6, a step for receiving the lid 2 may not be formed, and an inclined surface may be used.

In the tableware of the present invention, various decorations can be applied to the inner and outer surfaces. The decoration includes, for example, painting and printing. For painting, drawing with synthetic resin paint such as acrylic resin and urethane resin,
A screen printing method, a spraying method, and the like are used, and a printing method in which a pattern paper or the like is printed in advance on the inner surface of a mold when the outer container is formed is used. In addition, the texture of high quality tableware can be given by applying a paint or an inlay finish with a mulch.

The tableware of the present invention is not limited to the bowl of the above-described example, but also includes plates, bowls, cups and the like.

[0017]

As described above, according to the first aspect of the present invention,
In the tableware of the above, the inner container and the outer container are tightly integrated, so that they will not be deformed or damaged even if subjected to severe handling, and that water will enter between the inner and outer containers. There is no. In addition, it has high mechanical strength, can be made thin, and can have a beautiful design. Also, since no harmful substances are extracted from the inner container, the safety is high.

In the tableware according to the second aspect, the lips are not burned when the contents are further filled with high temperature.
Further, in the tableware according to claim 3, the step can be used as a seat for the lid.

Further, in the method for manufacturing tableware according to claim 4,
The above-mentioned tableware can be manufactured efficiently and inexpensively.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of the tableware of the present invention.

FIG. 2 is a cross-sectional view showing an enlarged main part of an example of the tableware of the present invention.

FIG. 3 is a sectional view showing an example of the tableware of the present invention.

FIG. 4 is an enlarged sectional view showing a main part of an example of the tableware of the present invention.

FIG. 5 is an enlarged sectional view showing a main part of a modified example of the tableware of the present invention.

FIG. 6 is an enlarged sectional view showing a main part of another modification of the tableware of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Bowl body 2 ... Lid 3 ... Inner vessel 4 ... Outer container 5 ... Folding part

Claims (4)

[Claims] 1. An inner container made of metal and an outer container made of synthetic resin that covers the outside of the inner container are tightly and integrally joined together, and an opening edge of the inner container is bent outward to form an outer container. A tableware characterized by being embedded in a synthetic resin layer of a container. 2. The tableware according to claim 1, wherein an opening edge of the inner container is located lower than an opening edge of the outer container. 3. The tableware according to claim 1, wherein an opening edge of the inner container is located lower than an opening edge of the outer container, and a step is formed at this position. . 4. An inner container made of metal and having an open end portion bent outward is set in a mold, the outside of the inner container is tightly and integrally covered, and the open end portion of the inner container is closed. A method for manufacturing tableware, wherein a synthetic resin serving as an outer container is injected into a mold so as to be embedded.