Refrigerator reduced-pressure foaming box clamp

Abstract

The invention relates to the field of refrigerator foaming and particularly relates to a refrigerator reduced-pressure foaming box clamp comprising an upper assembly, a lower assembly, an electric control system, a waterway temperature control system, a pneumatic control system, a reduced-pressure air drafting system and a gun head foam injection mechanism. The refrigerator reduced-pressure foaming box clamp is characterized in that the upper assembly is arranged above the lower assembly; the left side of the lower assembly is provided with the pneumatic control system; the front side of the lower assembly is provided with the electric control system; the rear side of the lower assembly is provided with the waterway temperature control system; the reduced-pressure air drafting system is connected above the upper assembly; and the front side of the upper assembly is provided with the gun head foam injection mechanism. Compared with the prior art, the refrigerator reduced-pressure foaming box clamp has the advantages that the hard sealing of a V-shaped structure is adopted, so that the flow speed of an air flow can be effectively reduced, and a negative-pressure environment is achieved; and the hard sealing of an elastic structure is adopted, so that the adjustability of equipment is improved, a gap generated by a foaming force in a foaming process can also be made up, and a negative-pressure foaming environment is guaranteed.

Description

technical field [0001] The invention relates to the field of refrigerator foaming, in particular to a refrigerator decompression foaming box fixture. Background technique [0002] Refrigerators, as daily necessary household appliances, are becoming more and more popular in the homes of ordinary people. At the same time, people have put forward higher requirements for the functions and types of refrigerators. Among them, the refrigerator box is the main component of the refrigerator. In order to preserve food at low temperature, polyurethane is widely used as the insulation material, and the processing process of the box adopts foaming technology. [0003] Principle of polyurethane foam: Polyurethane foam is the continuous increase of molecular weight during the reaction process of polyol and isocyanate, and at the same time, bubbles are continuously generated in the reaction liquid phase to form foam. Continue to increase, and at the same time, bubbles are continuously gene...

AI Technical Summary

Problems solved by technology

However, in practical application, it is found that due to the repeated opening and closing of the fixture, even though the soft seal is used, it is still difficult to control the negative pressure airtight space

Because the system is a completely closed system, even when the clamp is closed, even when the clamp is closed, the slight leakage of the joint will cause the internal pressure to be unstable

As a result, the technology was discontinued after the introduction of the production line and used as normal pressure foaming, resulting in waste of equipment

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