JPS6146887A - Heat-insulating door for refrigerator, etc. - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an insulating door that is pivotably opened and closed at the front opening of an insulated box such as a refrigerator.

Structure of a conventional example and its problems FIG. 2 shows a conventional structure, and 1 is a heat insulating door provided at the front of the refrigerator. The heat insulating door 1 includes a flat front plate 1', a frame 2 provided around the periphery of the front plate 1', and a back plate (not shown) located on the back side of the front plate 1'. Further, the chamber formed by the front plate 1' and the frame 2 is filled with a foam heat insulating material 3. A pair of front and rear retaining pieces 2a are formed on the front end of the frame body 2 so that the entire peripheral edge of the front plate 1' is formed at the front end of the frame 2.
, 2b, and the front plate 1' and the frame 2 are assembled in a predetermined jig, and the space between the front plate 1', the frame 2, and the jig is filled with a heat insulating material 3. Prior to this, the joint portion between the retaining piece 2a of the frame body 2 and the front plate is sealed with a sealing material 4 such as hot melt, putty, or tape. Furthermore, a rust preventive material 5 made of urethane paint is applied to the end of the front plate 1'. Therefore, the work of applying the sealing material 4 and the rust preventive material 5 is time consuming and has the drawback of poor productivity. Furthermore, if the sealing material 4 is applied unevenly, the foamed heat insulating material 3 may enter between the retaining pieces 2a and 2b, causing the front plate 1' and the frame body 2.
There was a problem that it worsened the integrity of the system.

OBJECTS OF THE INVENTION The present invention eliminates the drawbacks of the above-mentioned conventional examples, and prevents the leakage of the heat insulating material and prevents the front panel from rusting, thereby simplifying the manufacture of the heat insulating door, making it cheaper and improving productivity. It is something.

Structure of the Invention In order to achieve the above object, the present invention applies a foaming paint to the entire circumferential edge of the front plate or the front end engagement piece of the frame, and foams the foaming heat generated when the foaming insulation material foams. Since the insulating door is structured so that the paint foams, the insulating material does not leak and the front panel has a rust-preventing effect, simplifying the manufacturing of the insulating door, making it cheaper and improving productivity. be.

DESCRIPTION OF THE EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to FIG. 1, however, the same components as those of the prior art will be given the same reference numerals and detailed explanations thereof will be omitted.

In the figure, 6 is a foamed paint made by mixing a foamed resin that foams at 60 to 120°C and a paint. The frame body 2 is made of hard PVC manufactured by profile extrusion molding, and the retaining piece 2a is formed with the foamed paint 6 in a film thickness of 50 to 200 μm on the front end portion of the frame body 2 in the profile extrusion process.

It is applied between 2b. Of course, the foamed paint 6 may be applied to the entire circumferential edge of the front plate 1. This foamed paint 6 is foamed by the foaming heat generated when filling the space between the front plate 1, the frame 2, and the jig with the heat insulating material 3, so it prevents leakage of the insulating material 3 and prevents the edge of the front plate. It has a rust-preventing effect on the parts, simplifies and shortens the manufacturing process of heat-insulating doors, and improves productivity at low cost.

Effects of the Invention The present invention has the above-mentioned configuration, in which a foaming paint is applied to the entire circumferential edge of the front plate or the front end engagement piece of the frame, and the foaming material is foamed by the foaming heat when the foaming insulation material is foamed. The insulation door is constructed in such a way that the paint foams, so it prevents the leakage of the insulation material and has a rust-preventing effect on the front panel. Instead of replacing it with paint application, it is easy to automate and shorten working time, simplifying the production of heat-insulating doors, making it cheaper and improving productivity.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a heat-insulating door according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a conventional heat-insulating door. 1'...Front plate, 2...Frame, 2a
, 2b... Engaging piece, 3... Foamed heat insulating material, 6... Foamed paint.

Claims (1)

[Claims] A front plate and a frame combined with an end of the front plate are provided, and a foam insulation material is foamed and filled into a chamber formed by the front plate and the frame, and the end of the front plate or the frame A heat-insulating door for a refrigerator, etc., with foam paint pre-applied to the engaging piece at the front end of the body.