Process for producing negative pressure foamed refrigerator

A production process and refrigerator technology, applied in the field of refrigerator foaming, can solve the problems of high foam density, increased flow resistance, and poor thermal insulation performance of refrigerators, and achieve the effects of high foam strength, small flow resistance, and reduced porosity

Inactive Publication Date: 2011-02-23
CHANGHONG MEILING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the foaming production efficiency of refrigerators is gradually improving, and the assembly process of the box body and the door body is becoming more and more refined. , the release of gas is accelerated, the air pressure in the cavity increas

Method used

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  • Process for producing negative pressure foamed refrigerator
  • Process for producing negative pressure foamed refrigerator
  • Process for producing negative pressure foamed refrigerator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] Embodiment: The production process of the negative pressure foaming refrigerator of the present invention is carried out according to the following steps:

[0026] a. Place the refrigerator box in a sealed system;

[0027] b. Vacuum the cavity of the box body before injection to make it in a negative pressure state;

[0028] c. Inject material into the box cavity, and the material liquid is foamed, filled, and solidified to form a foamed box.

[0029] The vacuuming step is that the vacuum degree of the box cavity is in the range of 0 to -0.08Mpa;

[0030] The injection step is to inject a feed liquid composed of isocyanate and combined polyether in parts by weight of 1.1 to 1.3:1 into the cavity of the box body. The combined polyether contains a foaming agent, and the foaming agent is added The weight percent in ether is 9~23%;

[0031] The foaming agent is one or a combination of cyclopentane, isopentane, 245fa, 365mfc, and 134a.

[0032] In concrete implementation...

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PUM

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Abstract

The invention discloses a process for producing a negative pressure foamed refrigerator, which comprises the following steps of: putting a refrigerator box into a sealing system, vacuumizing a box cavity to ensure a negative pressure state, feeding the box cavity, foaming feed liquid, filling and curing to form a foamed box. Compared with the conventional foamed refrigerator, the refrigerator manufactured by the process has the advantages of uniform foam density distribution, low feeding amount, low power consumption, high demoulding efficiency and the like.

Description

Technical field: [0001] The invention relates to a negative pressure foaming refrigerator production process, which belongs to the technical field of refrigerator foaming. Background technique: [0002] The foaming of refrigerators and freezers generally refers to rigid polyurethane foaming. The foam is between the outer shell and the inner lining of the refrigerator. Inject into the cavity of the mold box or door body to react and release heat. The foaming agent in the raw material is vaporized by heat to form micro-bubbles, which grow and expand, fill the cavity of the box body or door body, and solidify to form a hard foam. Polyurethane closed-cell foam. The performance and production process of the foam determine the performance of the refrigerator and freezer. [0003] The foam performance and production process are related to the reaction speed, and the gel time can be used to characterize the reaction speed. Generally, the faster the reaction speed, the finer the c...

Claims

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Application Information

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IPC IPC(8): B29C44/42B29C44/18
Inventor 水江波王贞平江峰叶小三黄玲
Owner CHANGHONG MEILING CO LTD
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