JP3598628B2 - Manufacturing method of heat insulating material for heat insulating housing - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for manufacturing a heat insulating material serving as a core material of a heat insulating wall constituting a heat insulating casing such as a vending machine for hot and cold products and a showcase.
[0002]
[Prior art]
The structure of the conventional insulation casing noted head, but construction filled with etc. glass wool between the inner and outer double wall were common, and recently its inside and outside for example a foam plastic plate polyurethane as a core material The housing is configured by combining a heat insulating wall having a sandwich structure with a wall plate.
[0003]
By the way, taking the cabinet of a vending machine as an example, the outer box of the cabinet is formed of a flat heat insulating wall. In particular, the heat insulating wall disposed at the bottom of the cabinet leads the drain drain hole and the drain to the hole. Since the recess, the groove for the refrigerant pipe of the refrigerator, and the like are formed, the heat insulating material serving as the core of the heat insulating wall has a complicated shape in which the recess, the hole, and the notch are formed on the plate surface. . Therefore, in order to produce a complicated heat insulating material having such a shape, a general manufacturing method is to prepare a foaming mold corresponding to the shape of the heat insulating material, and inject a foaming resin liquid such as polyurethane into the foaming mold. Has been adopted.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional manufacturing method of forming a heat insulating material by the above-mentioned foam molding method, a variety of foam molds having different sizes and shapes are required for each model such as a vending machine, and the foam molding operation is time-consuming. Therefore, the productivity is low and the cost for the foaming mold is increased due to the addition of the cost for the foaming mold.
[0005]
SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to solve the above-described problems and to manufacture a heat insulating material having a complicated shape at a low cost and with high productivity without employing a foam molding method which increases the cost. It is an object of the present invention to provide a method of manufacturing a heat insulating material for a heat insulating housing that can be made.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, according to the manufacturing method of the present invention, there is provided a method for manufacturing a plate-like heat insulating material which is a core material of a heat insulating wall constituting a heat insulating housing, wherein a concave portion and a hole portion are formed on a plate surface of the heat insulating material. , Notches, etc., shall be manufactured by laminating a plurality of foamed plastic plates made of foamed plastic slab material as the heat insulating material. After processing the portions corresponding to the concave portions, the hole portions, and the cutout portions, these are laminated to produce a heat insulating material.
[0007]
According to the above-mentioned manufacturing method, a foaming mold which causes a high cost is not required, and a foamed plastic slab material obtained from the market is used as a raw material, and a plurality of foamed plastic plates are laminated and manufactured. After processing the portions corresponding to the recesses, holes, and cutouts in the slab material for each foamed plastic plate, simply attaching them together makes it possible to produce a heat insulating material having a complicated shape with good productivity at low cost. it can.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
First, the principle of the method for manufacturing a heat insulating material according to the present invention will be described with reference to FIG. First, a slab material 1 of foamed plastic (for example, polyurethane foam) shown in FIG. 1a is a kraft paper for protection attached to both front and back surfaces of the slab material 1. Next, as shown in FIG. 2 (b), a notch 1b having a predetermined depth is formed in the plate surface of the slab material 1 using a cutting blade (Thomson blade) 2 along the contour of the concave portion and the hole portion. Next, as shown in FIG. 3C, the cut portion in the above step is compressed and punched by a press die 4 to form a concave portion 1c and a hole portion 1d in the plate surface of the slab material 1.
[0009]
Next, a specific embodiment of the manufacturing method according to the present invention is shown in FIG .
[Example 1]
FIG. 2 shows an embodiment of a manufacturing method according to claim 1 of the present invention. In this embodiment, as shown in FIG. 2 (c) , a heat insulating material 6 is formed of two foamed plastic plates 6I. 6II is to be manufactured as a two-layer structure in which it is superimposed on top and bottom. Then, using a foamed plastic slab material having a thickness half that of the heat insulating material 6 as a material, an upper foamed plastic plate 6I shown in FIG. 2A and a lower foamed plastic plate 6II shown in FIG. Manufactured in a pressing process. The upper foamed plastic plate 6I is punched by using a press die as an opening 6d at a portion corresponding to the recess 6a of the heat insulating material 6. The lower foamed plastic plate 6II has a hole 6b and a cutout 6c. Is punched. Next, the upper foamed plastic plate 6I and the lower foamed plastic plate 6II are superimposed on each other as shown in FIG. 2 (c) , and an adhesive tape 7 is stuck over the periphery thereof or adhered to the superimposed surface. The heat insulating material 6 having the two-layer structure integrated by applying the agent is completed.
[0010]
According to the manufacturing method of this embodiment, the formation of the concave portion 6a can be dealt with only by punching without needing press working to compress the slab material in the thickness direction. As a result, high dimensional accuracy can be obtained.
[0011]
【The invention's effect】
As described above, according to the manufacturing method of the present invention, a heat insulating material having a complicated shape can be manufactured with high productivity only by punching a slab material of a foamed plastic that is available at a low price, without using a foam molding method. It has the economical advantage that the production cost is about half that of the foam molding method.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating the principle of a method of manufacturing a heat insulating material according to the present invention.
FIGS. 2 (a), (b), and (c) are external perspective views of an upper foam plastic plate, a lower foam plastic plate, and a completed heat insulating material, respectively. Explanation of reference numerals]
DESCRIPTION OF SYMBOLS 1 Slab material of foamed plastic 2 Cutting blade 6 Insulating material 6a Depression 6b Hole 6c Notch 6I Upper foamed plastic plate 6II Lower foamed plastic plate 7 Adhesive tape

Claims (1)

This is a method of manufacturing a plate-like heat insulating material which is a core material of a heat insulating wall constituting a heat insulating housing, wherein a concave, a hole, a notch or the like is formed on a plate surface of the heat insulating material. A plurality of foamed plastic plates made of the above slab material are superimposed and manufactured. After processing the portions corresponding to the recesses, holes, and cutouts in the slab material for each layer of the foamed plastic plate, And a method of manufacturing a heat insulating material for a heat insulating housing, characterized by laminating these .

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