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Method and device for improving foaming process of refrigerator body or refrigerator door body

A technology for a box and a refrigerator is applied in the field of improving refrigerator box or door foaming, which can solve the problem of lowering the yield of refrigerator box production, and achieve the effects of increasing the yield and improving the exhaust effect.

Active Publication Date: 2012-07-04
HONGBAOLI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the problem that the production yield of the refrigerator box decreases

Method used

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  • Method and device for improving foaming process of refrigerator body or refrigerator door body
  • Method and device for improving foaming process of refrigerator body or refrigerator door body
  • Method and device for improving foaming process of refrigerator body or refrigerator door body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Figure 1-6 It is a schematic diagram of the foaming device of the refrigerator box.

[0028] Described foaming device is made up of foaming unit 1, pressure control unit 2, decompression device 3 and the pipeline that connects them, as figure 1 shown.

[0029] Wherein, the foaming unit 1 is composed of a mold 11 , a pre-foamed body 9 and an air duct 4 . The pre-foam body 9 is surrounded by an inner container 12 and an outer shell 13 . The mold is provided with a hollow protruding part 5 at a corner of the far end corresponding to the foaming raw material filling, and as an exhaust groove, an exhaust pipe 6 is arranged in the exhaust groove, and the air guide pipe 4 passes through the exhaust pipe 6 and the lower vacuum. The first pipeline 17 of high vacuum degree is connected, and the protruding part 5 is connected with the second pipeline 18 of higher vacuum degree. The pressure control unit 2 consists of pressure gauges 21a, 21b, valves 10a, 10b and connected pip...

Embodiment 2

[0043]The rest are the same as embodiment 1, the difference is that this embodiment is the embodiment that the door body of the refrigerator is foamed. Fig. 7 is a schematic diagram of a refrigerator door foaming unit. The mold is composed of an upper clamp 12 and a lower clamp 13, and a sealing material 24 is provided at the junction of the upper and lower clamps. The pre-foam 9 of the refrigerator door body is placed in the mould, and the pre-foam 9 is provided with an air duct 4, and the foaming material is injected by the injection port 19. A hollow protruding portion 5 is provided on the upper clamp of the mold at a corner of the far end corresponding to the filling of the foaming raw material, and as an exhaust groove, the protruding portion 5 is connected to the second pipeline 18 of a higher vacuum degree, and the air guide pipe 4 and A first duct 17 of lower vacuum is connected and extends out of the mould. The space between the pre-foamed body and the mold and the ...

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Abstract

The invention relates to a method and device for improving the foaming process of a refrigerator body or a refrigerator door body. According to the method, foaming is performed in a foaming cavity of a prefoaming body to make a refrigerator body; before foaming, the prefoaming body is arranged in a die, a space is reserved between the prefoaming body and the die, vacuumizing and foaming are performed in the foaming cavity and the space between the prefoaming body and the die at the same time, wherein the vacuum degree of the foaming cavity is lower than the vacuum degree of the space between the prefoaming body and the die. The device especially used for improving the foaming process of the refrigerator body or the refrigerator door body comprises a die and an air-guide tube, the die is provided with a hollow raised part corresponding to one corner of a far end filled with foaming raw material, an exhaust opening is arranged on the raised part and the air-guide tube extends out of the die from the raised part. According to the invention, since pressure reduction is performed on the die and the foaming cavity at the same time and the vacuum degree of the die is high, the shape of the refrigerator body is limited by the die during the foaming process of the hollow wall of the refrigerator body or the refrigerator door body; therefore, the exhaust effect is improved and the yield of refrigerator body production is increased.

Description

technical field [0001] The invention relates to a method and a device for improving the foaming of a refrigerator box or door body. Background technique [0002] With the improvement of living standards, people have higher and higher requirements for refrigerators (or freezers), especially energy-saving requirements. As the volume of the refrigerator becomes larger and larger, the structure of the cavity becomes more and more complicated. The refrigerator is large in size and complex in structure, requiring the reaction mixture to have good fluidity in the cavity of the refrigerator to ensure its filling; on the other hand, the thermal conductivity of rigid polyurethane foam is positively correlated with the reaction parameters, that is, the reaction rate of the reaction mixture Acceleration is conducive to the reduction of thermal conductivity, while the acceleration of reaction speed is not conducive to foam filling, which makes the reaction speed of the reaction mixture ...

Claims

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Application Information

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IPC IPC(8): B29C44/02B29C44/34
Inventor 邢益辉吴一鸣王金祥孔玉荣付振华
Owner HONGBAOLI GRP CO LTD
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