Chemical foaming prepressing high speed injection molding method

Abstract

The invention relates to a pre compression chemical foaming high speed injection mold forming. It synthetically uses the resources like injection molding equipment, molds, plastic materials and so on. It starts with the tight closing of the mold, injecting the precompressed melt material into the mold cavity, filling the cavity through inside foaming with the melt material closely attached to the metal wall of the cavity, solidification of the material after cooling, opening the male mold and the female mold to get the smooth, tight, and evenly allocated plastic parts. It can eliminate or reduce the shrink dent or warpage of the part, reducing injection pressure and the mold locking pressure, with low running cost, improved product dimension precision and strength, effectively reducing material consumption by 15%-35%, with higher mechanical feature and weight proportion.

Description

technical field [0001] The invention relates to a chemical foaming injection molding process method for foamed plastic parts, in particular to a chemical foaming pre-pressing method for thick-walled plastic foamed parts used in industries such as auto parts, sports equipment, home appliances and toys Injection molding method. Background technique [0002] Affected by factors such as oil prices and material energy shortages, global plastic raw material prices are on the rise, and plastic application technologies that save raw materials and improve efficiency have developed rapidly. In terms of injection molding, foam molding, gas-assisted injection molding and water-assisted injection molding and other application technologies and equipment development are important components of the development of the plastics industry and processing technology in recent years. Foam injection molding technology is one of the most popular technologies in the industry. The most interesting th...

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Problems solved by technology

[0004] Aiming at the problems that the existing foaming injection molding technology has high requirements for auxiliary machine parts, the technical problem to be solved by the present invention is to overcome the above-mentioned shortcomings of physical and chemical foaming methods that require high equipment, and provide a simple and practical comprehensive utilization injection molding machine System resources such as equipment, molds, plastic raw materials, etc., a method for high-speed and efficient production of thick-walled plastic foam parts

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