Energy-saving supercritical EPE foam molding process

Abstract

The invention belongs to the technical field of EPE foam molding, and particularly relates to an energy-saving supercritical EPE foam molding process. The energy-saving supercritical EPE foam plasticforming process comprises the specific forming steps of S1, melting raw materials, wherein mixing the foamed plastic raw material base body, the reinforcing material and the coloring master batch through a mixing device; S2, injecting a foaming agent and mixing, wherein injecting the foaming agent into the mixed raw materials extruded in the step S1, mixing the foaming agent with the mixed raw materials through the mixing equipment to obtain a mixed semi-finished product raw material; S3, injecting a supercritical reaction promoter; and S4, performing physical cooling, cutting and forming, increasing the supercritical reaction promoter, so that the density of the formed foam plastic plate is uniform, and the foaming pore size is relatively uniform. According to the energy-saving supercritical EPE foam molding process, the raw materials are added in a segmented mode, the raw materials can be fully mixed, and the phenomenon of caking is avoided; the rotating speed of an extruding machineis limited, the discharging efficiency can be guaranteed, and meanwhile, the raw materials can be uniformly extruded.

Description

technical field [0001] The invention relates to the technical field of EPE foam molding, in particular to an energy-saving supercritical EPE foam molding process. Background technique [0002] EPE (Expandable Polyethylene), is expandable polyethylene, also known as pearl cotton. It is a non-cross-linked closed-cell structure, which is a high-foamed polyethylene product extruded from low-density polyethylene (LDPE) as the main raw material. [0003] Because the bubbles on the inner wall of the EPE material are closed and do not communicate with each other, the water absorption rate is small and the frost resistance is good, which ensures that it still has good heat insulation performance under water immersion conditions. The experiment of EPE board thermal insulation subgrade in the Kunlun Mountains of Qinghai-Tibet Highway (1990) showed that the 6cm thick EPE thermal insulation layer can reduce the heat flow from the surface to the deep layer, reduce the downward movement o...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an energy-saving supercritical EPE foam molding process to solve the problem of uneven density caused by the foaming agent and the preparation process during the preparation of the expandable polyethylene proposed in the above-mentioned background technology. , Difficulty in forming, reducing the quality of the product

Images