JPH0346754B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an apparatus for manufacturing a refrigerator door that is attached to an opening of a refrigerator and that opens and closes the opening.

(b) Conventional technology Conventional refrigerator doors of this type are, for example,
This is the configuration shown in Publication No. 38622. That is,
The door is constructed by filling an outer panel, a sash, an inner panel, and a space surrounded by these with a heat insulating material. Insulation materials include inserting foamed plastic in advance, or combining a sash and outer panel into a mold and filling it with urethane foam, etc. In either case, the inner panel is After forming the heat insulating layer, it is fixed to the sash with screws.

(c) Problems to be solved by the invention In such a structure, after inserting a pre-formed heat insulating material into the assembled outer panel and sash or foaming the insulating material on site, the inner panel is screwed. As a result, there were many work steps, leading to a significant drop in mass productivity.

(d) Means for Solving the Problems In order to solve the problems, the present invention provides an apparatus 1 for foam-filling a heat insulating material 29 between a door exterior material 6 and a door interior material 15. The upper mold 4 is rotatably pivoted to one side of the lower mold 2, and the lower surface of the upper mold 4 fits into a recess 18 of a door inner member 15 to hold the door inner member 15. forming an elastic protrusion 21;
The structure is such that when the upper mold 4 is rotated and superimposed on the lower mold 2 with the door outer material 6 stored in the lower mold 2, the door inner material 15 covers the door outer material 6.

(E) Function According to the present invention, the door inner member can be easily held on the lower surface of the upper mold simply by fitting the recess of the door inner member into the elastic protrusion of the upper mold. Further, by rotating the upper mold and superimposing the upper mold onto the lower mold, the door inner material covers the door outer material, thereby eliminating the need for complicated operations such as positioning both members.

(f) Examples Examples will be explained with reference to the drawings. FIG. 1 shows a foaming mold 1 as a door manufacturing apparatus of the present invention. 2 is a container-shaped lower mold having a surrounding side wall 3 and opening upward. Reference numeral 4 denotes an upper mold, which is rotatably attached to one side of the lower mold 2 at a hinge portion 5. The upper mold 4 is rotated and positioned so as to overlap the lower mold 2. The lower mold 2 has an inner surface shape that follows the outer shape of the door exterior member 6, as shown in FIG. The door exterior member 6 consists of a front plate 7 and a frame-shaped sash 9 whose edge is engaged with and accommodated in a groove 8 in the front edge. The rear edge of the side wall 10 of the sash 9 is formed with an inward flange 12 extending slightly inward, and a groove 13 for engaging a gasket (not shown) opened rearward at the base of the flange 12. . Such a door exterior member 6 is stored in the lower mold 2 with the front plate 7 facing downward and opening upward as shown in FIG.

Next, FIG. 3 shows a side sectional view of the inner plate 15 as a door interior member. The inner plate 15 is formed by vacuum forming a thermoplastic resin plate, and the surrounding flange part 16
A pair of protruding walls 17 for forming a pocket later are formed on the inside, and a groove-shaped recess 18 slightly recessed outward is formed at the inner base of each of the protruding walls 17. On the other hand, the lower surface of the upper mold 4 has a shape that follows the shape of the inner plate 15, and a recess 20 for accommodating the protruding wall 17 is formed, and the inner edge of the opening of this recess 20 has a small opening outward. An elastic protrusion 21 made of a rubber material or the like is formed so as to protrude. To temporarily fix the inner plate 15 to the upper mold 4,
The protruding wall 17 of the inner plate 15 is inserted into the concave part 20 of the upper mold 4, and when the concave part 18 comes into contact with the elastic protrusion 21, the elastic protrusion 21 and the inner plate 15 themselves are recessed. The elastic protrusion 21 is forcefully inserted into the position 18. By this fitting, the inner plate 15 is held on the lower surface of the upper mold 4.

In this way, with the inner plate 15 of the door exterior material 6 placed on the lower mold 2 and the upper mold 4, a foamed insulation material stock solution 25 such as polyurethane is injected from the upper opening into the door exterior material 6 from the nozzle 26 into the door. Inject into the external material 6. After that, when the upper mold 4 is rotated about the hinge 5 and lowered as shown by the arrow in FIG.
7 and polymerize on the lower mold 2. In this state, the flange portion 16 of the inner plate 15 is in contact with the flange 12 of the sash 9, and after the stock solution 25 is injected, a foaming reaction is gradually caused between the inner plate 15 and the door outer material 6. It fills and hardens to form a heat insulating material 29, and the adhesive force of the heat insulating material 29 allows both 6,
15 are combined. After that, when the upper mold 4 is opened upward, the elastic protrusion 21 moves into the recess 18 due to its elasticity.
Since it comes off more easily, the refrigerator door 30 as shown in FIG. 5 is completed by lifting it out from the lower mold 2.

In the present invention, the upper mold 4 is rotatably attached to the lower mold 2 by the hinge part 5, and can be superimposed on the lower mold 2 at a predetermined position by simply rotating and lowering the upper mold 4. There is no need to position both molds 2 and 4 each time. Further, the inner plate 15 is easily held on the upper mold 4 by simply fitting the elastic protrusion 21 of the upper mold 4 into the recess 18, and is also easily removed. At this time, since the recess 18 is located at the base of the projecting wall 17, the holding force for the inner plate 15 can be effectively exerted even if the recess is shallow. That is, since the protruding wall 17 usually has a tapered shape due to die cutting, the distance between them increases as they get closer to the tip, and the hardness of the inner plate 15 itself decreases, so the holding force tends to become weaker. Because it will be. Furthermore, since the recess 18 is located at the inner base of the protrusion 17, it is less conspicuous than those located on the outside, and does not cause any design problems.
Since it is provided at the inner opening edge of the recessed part 20 on the lower surface,
The manufacturing of the upper mold 4 itself becomes easier, and the elastic protrusion 21
It can also be easily replaced if it deteriorates over time. Furthermore, in the present invention, since the inner panel 15 and the door outer member 6 are integrated by the adhesive action of the heat insulating material 29, there is no need to connect them with screws or the like, and the number of work steps can be significantly reduced.

Note that a sealing material is usually provided between the flange 12 and the flange portion 16 to prevent leakage of the heat insulating material 29.

(G) Effects of the Invention According to the present invention, the upper mold is rotatably attached to one side of the lower mold, and by simply lowering the upper mold and overlapping it on the lower mold, the door exterior material and the door can be easily connected. Since the inner material can be formed in a predetermined positional relationship, the troublesome work of positioning both molds each time the insulation material is foamed is omitted, and the device structure is also simple. In addition, a recess is formed at the base of the pair of projecting walls to form a pocket formed in the door interior material, and an elastic protrusion on the lower surface of the upper mold is fitted into and engaged with the recess to hold the door interior material. Because it is a door door, even if the recess is shallow, it can effectively hold the inner door material, making it easy to attach and remove, significantly improving work efficiency, and having a simpler structure than one that uses a suction device to hold it. Furthermore, compared to those that are held by magnetic force or the like, contamination by iron powder and the like does not occur. Furthermore, since the elastic protrusion is provided on the lower surface of the upper mold, manufacturing of the upper mold itself becomes easy, and replacement work when the elastic protrusion deteriorates over time becomes easy.

[Brief explanation of drawings]

Each figure shows an example of the present invention. Figure 1 is a perspective view of a foaming mold, Figure 2 is a diagram showing the door manufacturing procedure, Figure 3 is a sectional view of the inner plate, and Figure 4 is a perspective view of a foaming mold. FIG. 5 is a sectional view of the door and the foaming mold after foaming of the heat insulating material is completed, and FIG. 5 is an inward perspective view of the door. 2...Lower mold, 4...Upper mold, 6...Door exterior material, 1
5...Inner plate, 18...Recess, 21...Elastic protrusion, 29...Insulating material.

Claims (1)

[Claims] 1. This device is composed of a lower mold and an upper mold rotatably attached to one side of the lower mold, and forms a door by foam-filling a heat insulating material between a door exterior material and a door interior material, and A pair of protruding walls for configuring a pocket are formed on the door interior material, a recess is formed at the base of the protrusion wall, and the door interior material is fitted into and engaged with the recess on the lower surface of the upper mold. An elastic protrusion is provided to hold the door outer material, and the upper mold is rotated to overlap the lower mold with the door outer material being stored in the lower mold and the door inner material being held in the upper mold. A manufacturing apparatus for a refrigerator door, wherein the inner door member sometimes covers the outer door member.