JPS5875683A - Manufacture of heat insulating box body of 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 The present invention relates to a method of manufacturing a disconnected box body for a refrigerator or the like, which is formed by injecting and foaming rigid polyurethane foam between an inner box and an outer box.

Conventional cold storage warehouses generally insert a separate partition into the inner box to divide the inner box into two compartments. However, using a separate partition reduces manufacturing costs and assembly. This method has disadvantages in that it requires a large number of steps and requires a seal between the partition member and the inner box.

Therefore, it has been devised that a raised part is integrally formed on the inner box to form a partition part that divides the inside of the inner box into two chambers. but,
``It is difficult to completely fill the rigid polyurethane foam inside the partition, so it has not been widely put into practical use.

The present invention has been made to overcome these drawbacks. Immediately, a raised part 2a is integrally molded on the inner box 2 formed by vacuum forming a synthetic resin plate to form a partition part that divides the inner box into two chambers, and the partition part $3 is made of styrene resin or the like. A concave part 3a for storing a cooler is provided on the upper surface, and after inserting the partitioned heat 5 so as to fill the space inside the raised part 2a of the inner box 2, a rigid polyurethane foam 8 is inserted between the outer box 1 and the inner box 2. It is an object of the present invention to provide a method for producing a disconnected box body for a cold M storage, etc., characterized in that the rigid polyurethane foam 8 is injected into the space to be formed and foamed, and the rigid polyurethane foam 8 is brought into direct contact with the partitioning heat 5. , details of the present invention will be explained using an example Mi shown in the drawings. The outer box of the refrigerator is constructed by combining the top plate 1a, rear plate 1b, etc. On the other hand, the inner box 2 is formed by vacuum forming synthetic resin material. During the molding process, the raised portion 2af is integrally molded to serve as a partition portion that divides the inside of the inner box into two sections. A partition break 3 made of styrene resin or the like is inserted into the raised portion 2a of the inner box 2. A recess 6a for storing a cooler is formed on the upper surface of the partition heat 6, and a suction pipe extraction hole 3b communicating from this recess 3a is formed on the back surface.
It is formed at an angle. Next, the front flange portion 1C of the outer box 1 and the front flange portion 2b of the inner box 2 are combined to form a box body. Thereafter, the cooler 4 is housed in the four parts 6a of the partition break 5, and its suction pipe 5 is led out of the frame through the rear plate 1b at an angle. Similarly, a heat insulating pipe 6 is wrapped around the suction pipe 5. A pusher 7f is provided to seal the passage of the suction pipe 5 through the rear plate 1b. In this state, rigid polyurethane foam 8 is injected into the space between outer box 1 and inner box 2 and foamed.

Therefore, according to the manufacturing method of a heat insulating box for a refrigerator or the like using hard polyurethane foam, the partition heat 6 is produced by integrally molding the raised part 2a on the inner box 2 to form a partition that divides the inside of the inner box into two compartments. Compared to the method in which a separate partition member is inserted, the manufacturing process and assembly man-hours are significantly reduced, and there is no need to seal the partition member and the inner box. Furthermore, by inserting and arranging the partitioning heat 5 made of styrene resin or the like into the space within the raised portion 2a of the inner box 2 and injecting and foaming the rigid polyurethane foam 8, it is necessary to fill the space within the raised portion 2a with rigid polyurethane foam. This eliminates the problem of not filling the space within the raised portion 2a with the rigid polyurethane foam 8, and also allows the partition portion M3 to directly contact the rigid polyurethane foam 8 and securely fix it. Furthermore, since the recess 3a for housing the cooler 4 is formed in the partition heat 3, a space for housing the cooler 4 can be easily secured. Furthermore, since the suction pipe 5 of the cooler 4 is guided out with a downward slope, it can be easily pulled out and repaired as shown in the imaginary line.

As explained above, according to the present defense, the raised portion 28 is integrally formed on the inner box 2 formed by vacuum forming a synthetic resin plate to form a partition portion that divides the inner box into two chambers, and the styrene resin A concave portion 3a for storing a cooler is provided on the upper surface of the partition heat 5, and the partition heat 3 is transferred to the raised portion 2a of the inner box 2.
After inserting the inner nitrogen so as to fill the space between them, a hard polyurethane foam 8 is injected and foamed into the gap formed by the outer box 1 and the inner box 2, and the hard polyurethane foam 8 is heated to the partitioning heat 6. [Manufacturing]
Step 2 - Assembly man-hours are significantly reduced, sealing between the partition part 10A and the inner box is no longer required, and the hard polyurethane foam 8 is not filled into the inner space 1111 of the raised part 2a, and the partition heat 6 is securely fixed. In both cases, a space for housing the cooler 4 can be easily secured.

[Brief explanation of drawings]

The figure is a cross-sectional view of the refrigerator according to the present invention. 1... Outer box, 2... Inner box, 5... Partitioning heat, 4.
...Cooler, 5...Suction pipe, 6...Insulation pipe, 7...
・Boom, 8...Urethane foam.

Claims (1)

[Claims] 1. Inner box formed by vacuum forming synthetic resin plate (2)
) is integrally molded with a raised part (2a) to form a partition part that divides the inner box into two compartments, and a concave part (filter a) for storing a cooler is provided on the upper surface of the partitioning heat (3) made of styrene resin, etc. After inserting this partitioning heat (3) so as to fill the space inside the raised part (2a) of the inner box (2), the rigid polyurethane foam (8) is inserted into the outer box (1) and the inner box (2). A method for producing a heat insulating box for a refrigerator or the like, characterized in that the rigid polyurethane foam (8) is injected and foamed into the space formed by the partitioning heat (3).