The process parameters such as melt pre-injection volume,melt temperature,mold temperature,gas injection pressure,delay time,and gas injection time directly affect the quality of gas assisted molding.Taking products with typical gas-assisted structures as the research object,and using gas penetration length and maxmum-gas finger as measurement indicators,the orthogonal test and response surface method are used to study the multi-objective optimization of gas assisted molding process parameters.Through orthogonal experiment range analysis and quadratic regression analysis of response surface method,the optimal molding process was:melt pre-injection volume was 85％,gas injection time was 10 s,melt temperature was 240 ℃,gas injection pressure was 3 MPa,delay time was 4 s,and mold temperature was 40 ℃.The numerical simulation and experiments showed that the gas penetration length and gas finger under the optimized parameter group were excellent,which can be used in the actual production of gas-assisted molding.
维普
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