JPS5885084A - Manufacture of door of refrigerator - 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 1) Technical Field of the Invention The present invention relates to a method for manufacturing a refrigerator door, particularly for manufacturing a door outer panel.

2) Purpose of the Invention The purpose of the present invention is to provide a method for manufacturing the above-mentioned door outer panel with less work and with high precision.

3) Structure of the Invention The present invention involves cutting at least a corner of a material made of a metal plate, and then positioning the material by aligning the tapered surface of the box with the cut portion, and cutting each side of the material. This is characterized in that the outer panel of the door is machined by bending and raising the door, and then shaping each joining part into a curved surface.

4) 51 inventions! The drawings show one embodiment of the present invention, and will be explained below according to the drawings. First, in Fig. 1, reference numeral 1 indicates an opening in the upper part of the main body 2 of the refrigerator door, for example, the front opening of the freezer compartment 5. This is a door that opens and closes, and 4 opens and closes the opening on the top of the main body 2, for example, the front of the refrigerator compartment 5.The former door 1 opens and closes the opening on the top of the main body 2, for example, in the front of the refrigerator compartment 5. M4 is filled with a heat insulating material 8 such as polyurethane foam, while the latter M4 is also made of a heat insulating material 11 such as polyurethane foam. . In addition, in Fig. 1, 12 are all ton ν, 13
14 is a condenser, 15 is a compressor, 16 is a cooler for the refrigerator compartment, and 15 is a compressor.
is an evaporating dish. The above-mentioned both doors 1, 4D door outer panel 6. ?
is manufactured as follows, and here is the manufacturing method! First of all, 21 shown in Fig. 2 (VCX) and 4 (e) K in Fig. 2 is the above-mentioned door outer panel 6, which is made of a metal plate such as a rectangular steel plate.
The first step is to cut corners on all square parts using an appropriate device (not shown).
I'm doing 2. In addition, although not shown in the drawings, holes for attaching a gasket F, a decoration, or a handle are drilled at necessary locations in the material 21, respectively.

After that, as a second step, as shown in FIG. 2(1))K, the long and short sides 211L, 2111121
ov 2111, and at the same time, each meeting part 21e, 21 for each side part 211L to 21d of 't-O.
ft21st21h are each shaped into a curved surface. Therefore, FIGS. 3 and 4 show the above-mentioned bending and m-shape device, in which 23 is a mold body 25 under the blank space 24 and a tapered surface 26 & 27 is a lower mold base 28.
The lower mold is provided with an upper K11 main body 291, and the mold main body 29 of the lower mold 27 is provided with a positioning 411 of the upper mold 23!
In addition to forming a hole 52 into which the 26 is inserted, a bending mold part 33a for bending and a shaping mold part 33b for subsequent ironing are formed in upper and lower stages on the inner mold surface 53. ing. Therefore, the above-mentioned corner cut 2 is placed on the lower die 27.
2, place the raw material 21, and in that state, lower the upper mold 23. If the raw material 21 is not in the correct position at this time and is shifted as shown in Figure 9, the positioning is done! 26 is inserted into the hole 52, the tapered surface 26& is applied to the corner cut 22 of the material 21, and the material 21 is pushed in the direction shown by arrow A in the figure to correct its position as shown in FIG. Thus 4
Book positioningliI! 26' to position the rope material 21 as shown in FIG. , 21a of the mold body 29 of the lower mold 27 in the range of the bent mold part 35 & of the mold surface 35, and then as shown in FIG.
1 (The mating parts 21e, 21r, 21g, and 21h of 1 are squeezed within the range of the shaping mold part SSS to form a curved shape K11l. After this, the material 21 is pressed between the mating parts 21e to 2
1hc1g welding, especially dewsma welding, is performed, and the nine-bulk material 21 to be welded is shown in Figure 2 ((1)), and after that the material 21 is Each edge 2111'I of the short side 21'b, 21(1)
211! ’ to the inside of the husband, and then (6) K in the same figure.
As shown, the edges 21&', 21 of the long sides 21a, 21a
After bending each of o' inward in the same way and making contact with spot #l, for example, Pc as shown in FIG.
1=Drill the hole 38 and make a finished product (product).

As mentioned above, in this example, the material 2 made of metal plate
Basically, corner cut 22 of 1 and then each side 2
11L~21d are bent and raised, and each side 211L~
A box-shaped door is manufactured by shaping the housing parts 21e to 21h of 21d, in which corners are cut 22, and the nine-bulk material 21 is then bent and raised on each side 21L to 21a. Furthermore, when shaping each of the joint portions 21e to 21h, since the book is positioned by pressing the corner cutters 22 by the tapered surfaces 26 & of the positioning wedge 26,
In particular, according to such a positioning method, the material 21 can be positioned accurately, and therefore, it can also be manufactured as a door with real precision.
There is no possibility that subsequent welding will be impossible due to the gap between Kf1 and the gap between Kf1 and Kf1.

5) Effects of the Invention As is clear from the above, according to the present invention, a refrigerator door can be manufactured by machining a material made of a metal plate by cutting corners, bending each side, and shaping each joint. 5j for positioning the materials when manufacturing the box-shaped door outer panel! It can be done effectively and accurately, which makes it 5J! It is a tortoise that has the remarkable effect of being able to be manufactured with high precision.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, so 1. Figure 1 is a longitudinal cross-sectional side view of the whole, and Figures 2 (a) to (f) show changes in the door outside panel material in the manufacturing process 11, and Fig. 3 is a longitudinal cross-sectional view of a device for bending each side of the material and forming the seam portion o*ys, Fig. 4 is a perspective view of the same device, and Fig. 5 is a part of the lower mold of the same device. FIG. 6 is an enlarged perspective view of the positioning lateral tip O; FIG. 7 is a vertical cross-sectional view during positioning of the material by positioning llK; FIG. 811 is a vertical cross-sectional view after positioning;
The figure is a cross-sectional view after positioning, Figure 10 is a vertical cross-sectional view of the device O in good condition after bending and raising the material, and Figure 11 is a vertical cross-sectional view of the device O in a state where the material has been shaped. It is. In the figure, 1.2 is a door, 6 and 9 are door outer panels, 21 is a base 7 is a lower mold, 33 is a mold surface, 33 & - is a mold part, and SSb is a shaping mold part. Applicant: Tokyo Shibaura Electric Co., Ltd. No. 1 Figure 2 Figure 4 Figure 6 Figure 7

Claims (1)

[Claims] In the refrigerator 11, which consists of a 1fi outer panel, a door inner panel, and a heat insulating material filled between them, the outer panel is made by cutting at least a corner of a material made of a metal plate, and then positioning wedges at the center of the cut portion. The test material is manufactured by bending and raising each side of the test material while aligning the tapered surface of the material, and then shaping each mating portion into a curved surface. Refrigerator #011 construction method.