JPH04369380A - Manufacture of insulated box - Google Patents

Abstract

PURPOSE:To easily form the foamed insulated box and dividers for use in the refrigerator for business use without leaving any unexpanded portion and under low pressure. CONSTITUTION:A method for making an insulated box which comprises the steps of forming a box body 2 composed of an inner and an outer box; attaching a divider 5 to the upper edges of the box body 2 spaced from the bottom thereof; providing a foaming liquid pour-in opening 17 at the one end of the divider 5; inserting insulating materials 15 into the rest of the ends thereof; securing the divider 5 to a front opening part 18 of the box body 2; and introducing the foaming liquid into the divider 5 through the pour-in opening 17 and into the box body 2 through the pour-in openings 12 provided at the suitable places thereof to effect the foaming independently of each other.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] The present invention relates to a heat insulating box having a structure in which a space between an inner box and an outer box is filled with a heat insulating material, and in particular, the inside of this heat insulating box is divided into a plurality of sections, and a plurality of The present invention relates to a method of manufacturing an insulating box having a storage compartment.

0002

2. Description of the Related Art Storage warehouses, such as commercial refrigerators installed in the kitchens of restaurants, etc., are equipped with a plurality of storage compartments in order to be able to store a large variety of food and drinks. In order to create a storage with multiple storage compartments like this,
It is necessary to provide the front opening with a partition that divides the opening of the storage into a plurality of openings. Then, a storage is manufactured by attaching an opening/closing door to each opening.

[0003] Foamed urethane is foamed and injected as a heat insulating material into the box body and partitions of the storage. Therefore, ensuring that urethane foam is injected into the box body and partitions of the storage box influences the insulation performance of the storage box.

FIG. 2 shows an example of a conventional method of manufacturing a heat insulating box.

[0005] The storage box body 2 consists of an inner box 3 made of a thin steel plate and an outer box 4 made of a stainless steel plate, and a constant distance is maintained between the two to form a space inside. On the other hand, the partition body 5 is also constructed by, for example, connecting a metal front plate and a rear plate each having a U-shaped cross section at their upper and lower sides with a resin connecting member, thereby creating a hollow space having a rectangular cross section. A partition body 5 is formed.

[0006] The cross-shaped inner partition 5 is passed through its ends 6a, 6b, 6c, and 6d to the storage box main body 2.
It is assembled so that it communicates with the internal space of the Further, the central intersection portion 9 of the partition body 5 is also hollow inside. In this way, a storage box 1A is formed in which the front opening 8 is divided into a plurality of parts by the partitions 5. In the same figure, 1
0A is the bottom wall of the storage, 10B and 10C are the left and right side walls, 10D is the back wall, and 10E is the top wall. An opening 11 is formed in the ceiling wall 10E to which a base equipped with a refrigeration unit (compressor, condenser, etc.) is attached.

Foaming is injected into the box 1A thus completed in the following manner.

First, the box 1A is fixed to a foaming jig (not shown) heated to a predetermined temperature, with the opening 8 facing upward. Then, a predetermined amount of the foaming stock solution is injected from the injection port 12 formed in the top wall 10E of the box body 1A. The injected stock solution is poured into the lower part of the box body 1A (in this case, the back wall 10D
It grows upward in order from the part), gradually rising up the space of the box body 1A, and filling the space as a foamed heat insulating material. The insulation material rising inside this space is located at the opening 8.
When the foam reaches the part where the foam is located, it is guided to the hollow part of the partition 5 that communicates with the space, and the inside of the partition 5 is also filled with foam.

[0009]

[Problems to be Solved by the Invention] As mentioned above, in the prior art, the box body 2 and the partition 5 are integrally foamed, and the foaming liquid is injected through one injection port 12 to manufacture the box. . However, in this method, it is difficult for the foaming liquid to flow around the inner partition 5, so that the inner partition may not be filled with foam.

As a countermeasure to this problem, it is possible to foam the foam by increasing the injection pressure of the foaming liquid, but this poses a problem in that the high injection pressure causes the box to bulge.

The present invention has been made in view of the above-mentioned problems, and does not cause unfilled foaming in the partition portion, can be performed at a low foaming pressure, has high heat insulation performance, and can reduce manufacturing costs. The purpose of the present invention is to provide a method for manufacturing a heat insulating box.

0012

[Means for Solving the Problems] The present invention provides a box body with a front opening formed by filling a space between an inner box and an outer box with a heat insulating material, and a plurality of front openings of this box body. In an insulating box consisting of an internal hollow partition provided at the opening of the box, the hollow part of which is filled with a heat insulating material, the hollow part of the partition and the box body are connected to each other. It is equipped with an insulating partition made of styrene foam or the like that makes the space non-communicating, an injection port that communicates with the hollow part of the partition, and an injection port that communicates with the space of the box body. When integrally formed, the box body and the partition are foamed separately using the respective injection ports.

[0013]

[Operation] The hollow part of the partition body and the internal space of the box body are prevented from communicating with each other by the heat insulating partition material. The inner partition and the box body are each provided with a dedicated injection port, and the foaming stock solution is injected through each injection port and foamed separately, resulting in unfilled foaming in the inner partition and the box body. I won't let you.

[0014] Furthermore, the foaming of the box body can be carried out at low pressure, eliminating the possibility of the box becoming bulky.

[0015]

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. Note that components that are the same or equivalent to those of the conventional configuration shown in FIG. 2 are given the same numbers.

The structure consisting of a box body 2 consisting of an inner box 3 and an outer box 4, and a partition 5 provided in a cross shape at the front opening 8 of this box body 2 is basically the same as the conventional one.

However, at the end where the partition 5 joins the box body 2 at the front opening 8, except for one end 6d, the remaining ends 6a, 6b, and 6c are filled with styrofoam in advance. Insulating partition materials 15, 15, 15, etc. are inserted. In addition, the end portion 6d of the heat insulating partition material 15 that cannot be inserted
are combined so as to be embedded in the opening side edge portion 16 of the top wall 10E of the box body 2. And this end 6d
, an injection port 17 for the foaming stock solution is formed on the side end surface thereof. Reference numeral 18 denotes a U-shaped heat-insulating partition made of polystyrene foam provided in the top wall 10E of the box body 2 so as to surround this end 6d. The foaming pressure of the material is not applied directly to this end 6d portion of the inner partition 5, and the inner partition 5 is
This prevents deformation. The inner partition body 5 is a heat insulating partition material 15
, 15, 15, the internal hollow space is not communicated with the internal space of the box body 2.

Reference numeral 12 denotes an injection port for foaming stock solution provided in the box body 2.

The method of injecting the urethane foam, which is a heat insulating material, is as follows. That is, the foaming liquid is injected into the box body 2 through the injection port and foamed.

On the other hand, a foaming liquid is injected into the partition 5 through the injection port 17 and foamed. In this way, the box body 2 and the partition 5 are foamed separately.

[0021] In this way, in the partition member 5, the foaming stock solution entering from the injection port 17 is divided into right and left parts in a straight line at the intersection part 9, and is foamed and filled into the partition member 1.
5, 15, 15, and the partition body 5
The inside can be completely filled with foam without any unfilled areas.

[0022] Also, when foaming the box body 2 side, only the space inside the box is filled with foam, and the foaming liquid does not need to be spread all the way to the partition 5, so a high foaming injection pressure is not required. Therefore, foam can be injected at low pressure, there is no need to worry about the box bulging, and there is no need to use a large foaming jig.

[0023]

As described above, according to the present invention, the partition material is inserted into the joint between the box body and the inner partition, and the box body and the inner partition are foamed separately. It is possible to eliminate unfilled foaming of the body, and the injection pressure of the foaming liquid can be reduced to a low pressure, resulting in excellent effects such as eliminating the problem of the box.

[Brief explanation of the drawing]

FIG. 1 is a structural perspective view of a box body when a heat insulating box is manufactured by the foaming method of the present invention.

FIG. 2 is a structural perspective view of a box body when a heat insulating box is manufactured using a conventional foaming method.

[Explanation of symbols]

1A Box body 2　Box body 3 Inner box 4 Outer box 5　Inner partition body 15 Insulating partition material 17 Inlet

Claims (1)

[Claims] Claim 1: A box body with a front opening formed by filling a space between an inner box and an outer box with a heat insulating material, and a box body with a front opening formed by foam filling the space between an inner box and an outer box, and a box body with a front opening formed by foam filling the space between an inner box and an outer box, and a box body with a front opening formed by filling the space between the inner box and the outer box. In an insulating box consisting of an internally hollow partition provided at the opening and whose hollow part is filled with a heat insulating material, a styrofoam box is used to make the hollow part of the partition non-communicating with the space in the box body. etc., an inlet that communicates with the hollow part of the inner partition, and an inlet that communicates with the space of the box main body, and when the box main body and the inner partition are integrally formed, each of the above A method for manufacturing an insulating box, characterized by foaming the box body and the partition separately using an injection port.