Polyurethane foaming system and foaming method

Abstract

The invention discloses a polyurethane foaming system and foaming method, and relates to the technical field of foaming. The system comprises a premixing station and a foaming machine platform; the premixing station comprises a low-boiling-point foaming agent storage tank, a combined polyether storage tank, a common foaming agent storage tank, a premixing station white material storage tank and apremixing station black material storage tank; the foaming machine platform comprises a machine front white material tank and a machine front black material tank; the combined polyether storage tank,the combined polyether storage tank and the common foaming agent storage tank are all communicated with the premixing station white material storage tank; the low-boiling-point foaming agent storage tank is communicated with the premixing station black material storage tank; the premixing station white material storage tank is communicated with the machine front white material tank; the premixingstation black material storage tank is communicated with the machine front black material tank; and the machine front white material tank and the machine front black material tank are connected with asame material injection gun head through pipelines. According to the invention, a low-boiling-point foaming agent and a black material are premixed, so that the temperature influence on a white material is reduced, the white material can be controlled at a relatively high temperature, and the problems of high viscosity and influence on the foaming effect of an existing white material are solved.

Description

technical field [0001] The invention belongs to the technical field of foaming, in particular to a polyurethane foaming system and a foaming method. Background technique [0002] Refrigerators and freezers are indispensable electrical appliances in life. Polyurethane foam is an essential link in product manufacturing. With the rapid development of polyurethane foam technology, the thermal insulation performance, physical properties and production efficiency of polyurethane foam are continuously improved. [0003] The current mainstream foaming system is to use two or more foaming agents to mix, generally about 25% of low boiling point foaming agents (such as 245fa, LBA, 134a, 152a, R600, R600a) and about 75% of ordinary Blowing agent (such as cyclopentane) for mixing. Mix these foaming agents into the combined polyether to obtain the white material, then put the white material and black material in the high-pressure mixing injection gun head, mix them and inject them into t...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a polyurethane foaming system, by premixing low-boiling point foaming agent with black material, reducing the temperature influence on white material, so that white material can be controlled at a higher temperature, solving the existing problem The viscosity of the white material is high, which affects the foaming effect

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