Study and application of pressure-volume behaviors of entrained gas materials in foam injection molding
In this study,in-line measurement of pressure-volume-temperature in injection molding was achieved by using a modified conventional microcellular injection molding machine that generates high pressure on the recovered entrained gas polymer melt.The studies on the pressure-volume behavior of entrained gas melts of polystyrene and polypropylene at a certain temperature indicated that the compressibility of entrained gas polymer melts was much greater than that of gas free polymer melts at specific temperature.In practical applications,the larger compressibility of entrained gas polymer melts can be used to assist in injection and speed up the gas integration process into the melt,thereby improving foaming quality.On the other hand,the pressure release test based on the potential safety hazards of entrained gas polymer melt due to its large compressibility of the melt has put forward a new safety operation guide for injection molding of entrained gas materials for the first time in China.
microcellular foam injection moldingpolystyrenepolypropeneentrained gas meltcompressibilitysafetypressure-volume
国家科技期刊平台
NSTL
万方数据
