JPH05312465A - Thermally insulated box - Google Patents

Abstract

PURPOSE:To facilitate disposal work and disintegration work by a method wherein the principal material of an outer box and an inner boxs is composed of the same material as that of expanded insulating material loaded into the gap between both the boxes, thereby eliminating the need to separate the inner and outer boxes and the insulating material at the time of disposal and disintegration work. CONSTITUTION:An insulated box of the refrigerator is composed of an outer box 2 and an inner box 3 made of thermosetting polyurethane resin or thermoplastic styrene resin and expanded insulating material 4 such as thermosetting urethane foam is loaded into the gap between the boxes 2, 3. In this manner, the boxes 2, 3 have the same principal component as that of the material 4, whereby it is not necessary to separate the boxes 2, 3 and the material 4 at the time of disposal and disintegration thereof, so that disposal work can be performed easily. And thermoplastic resin is used as a principal component, as material, and hence equipment cost of a mold is made lower than that of a rim mold and moldability is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating box for a refrigerator or the like.

[0002]

2. Description of the Related Art In recent years, commercialization of refrigerators and the like, which can be easily discarded or recycled, has been advanced.

An example of a conventional heat insulating box will be described below with reference to the drawings. FIG. 3 is a sectional view of a conventional heat insulating box. In FIG. 3, reference numeral 1 is a heat insulating material such as a rim-molded urethane foam.

[0004]

However, in the above conventional structure, the jacket of the heat insulating material 1 is formed of a urethane resin layer having a high density, and the central portion is formed of a resin layer of urethane having a low density. Therefore, it is necessary to apply heat to the outside and inside of the mold. Therefore, there are drawbacks that the equipment cost of the mold is high, the moldability is poor, the material cost is high, large-scale molding is difficult, and the defective molding rate is high.

The present invention eliminates the conventional drawbacks, that is, the equipment cost of the mold is lower than the rim molding, the moldability is good, the material cost is low, the large-scale molding is easy, and the defective molding rate is low. An object of the present invention is to provide a heat-insulating box body that does not require separation of an outer box, an inner box and a heat insulating material at the time of disposal or disassembly.

[0006]

In order to achieve this object, the heat insulating box body of the present invention comprises an outer box, an inner box, and a foamed heat insulating material filled in a gap between the inner box and the outer box. It is a material of the main component of.

Further, the inner box, the outer box, and the foamed heat insulating material are mainly composed of a thermosetting material.

Further, the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermoplastic material.

[0009]

In the heat insulating box of the present invention, the outer box, the inner box, and the foamed heat insulating material are made of the same main component material by the above-described structure. Since separation is not required, disposal work can be easily done.

Further, since the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermosetting material, the facility cost of the mold is lower than the rim molding, the moldability is good, and the material cost is low. It is cheap, large-scale molding is easy, the defective rate of molding is low, and at the time of disposal,
At the time of disassembly, it is not necessary to separate the inner box, the outer box and the heat insulating material, so that the disposal work can be easily performed.

Further, since the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermoplastic material, the material can be reused as compared with the thermosetting material, and the mold can be used more than the rim molding. Equipment cost is low, moldability is good, material cost is low, large-scale molding is easy, molding failure rate is low, and it is necessary to separate the inner box from the outer box and the heat insulating material at the time of disposal or disassembly. Since it does not, it is easy to dispose of it.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An insulation box body according to an embodiment of the present invention will be described below with reference to FIG. The same components as those of the conventional one are designated by the same reference numerals, and the detailed description thereof will be omitted.

FIG. 1 is a sectional view of a heat insulating box in an embodiment of the present invention. In FIG. 1, 2 is an outer box made of thermosetting polyuthan resin, 3 is an inner box made of thermosetting polyutan resin, 4 is thermosetting filled in a gap between the outer box 2 and the inner box 3. It is a foamed heat insulating material such as urethane foam.

In the above construction, after the outer box 2 and the inner box 3 are combined, the foam insulation material 4 such as urethane foam is foamed and filled.

As described above, since the outer box 2, the inner box 3 and the foamed heat insulating material 4 are made of the same thermosetting main component material, the outer box 2, the inner box 3 and the heat insulating material are disposed at the time of disposal or disassembly. Since it is not necessary to separate from 4, the disposal work can be easily performed. Further, since the foam insulation material filled in the gap between the inner box and the outer box and the inner box and the outer box is mainly composed of a thermosetting material, the facility cost of the mold is lower than that of the rim molding. The moldability is good, the material cost is low, large-scale molding is easy, and the molding defect rate can be lowered.

FIG. 2 is a sectional view of a heat insulating box in another embodiment of the present invention. Hereafter, the same components as those in the above embodiment are designated by the same reference numerals, and the detailed description thereof will be omitted. Will be described only. In FIG.
Reference numeral 5 is an outer box made of thermoplastic styrene resin, 3 is an inner box made of thermoplastic styrene resin, and 4 is a thermoplastic polystyrene foam insulating material filled in a gap between the outer box 2 and the inner box 3. ..

In the above construction, the thermoplastic outer box 5 and the thermoplastic inner box 6 are combined, and then the thermoplastic styrene foam insulation 7 is foam-filled.

As described above, since the outer box 2, the inner box 3 and the foamed heat insulating material 4 are made of the same material having the same thermoplastic main component, the material can be reused more easily than the thermosetting material. .. Also, the equipment cost of the mold is cheaper than the rim molding, the moldability is good, the material cost is low, the large-sized molding is easy, the molding defect rate is low, and the outer box 2 and the inner box at the time of disposal or disassembly. Since it is not necessary to separate the heat insulating material 3 and the heat insulating material 4, the disposal work can be easily performed.

[0019]

As described above, the present invention comprises the inner box, the outer box, and the foamed heat insulating material filled in the gap between the inner box and the outer box. However, since it is a material having the same main component as the foam insulation material filled in the gap between the inner box and the outer box, it is not necessary to separate the outer box, the inner box and the heat insulating material at the time of disposal or disassembly. Easy to dispose of.

Further, since the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermosetting material, the facility cost of the mold is lower than the rim molding, the moldability is good, and the material cost is low. It is cheap, large-scale molding is easy, the defective rate of molding is low, and at the time of disposal,
At the time of disassembly, it is not necessary to separate the inner box, the outer box and the heat insulating material, so that the disposal work can be easily performed.

Further, since the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermoplastic material, the material can be reused as compared with the thermosetting material, and the mold can be used more than the rim molding. Equipment cost is low, moldability is good, material cost is low, large-scale molding is easy, molding failure rate is low, and it is necessary to separate the inner box from the outer box and the heat insulating material at the time of disposal or disassembly. Since it does not, it is easy to dispose of it.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a heat insulating box according to an embodiment of the present invention.

FIG. 2 is a sectional view of a heat insulating box in another embodiment of the present invention.

FIG. 3 is a sectional view of a conventional heat insulating box.

[Explanation of symbols]

 2 Outer box made of polyurethane resin 3 Inner box made of polyurethane resin 4 Urethane foam foam insulation 5 Outer box made of styrene resin 6 Inner box made of styrene resin 7 Styrofoam insulation

Claims (3)

[Claims] 1. An inner box, an outer box, and a foamed heat insulating material filled in a gap between the inner box and the outer box, wherein the outer box and the inner box are the inner box and the outer box. An insulating box body, which is made of a material having the same main component as that of the foamed insulating material filled in the gap between and. 2. The heat-insulating box body according to claim 1, wherein the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermosetting material. 3. The heat insulating box body according to claim 1, wherein the inner box, the outer box and the foamed heat insulating material are mainly composed of a thermoplastic material.