聚丙烯保压注射成型冷却过程温度场的研究

摘要

采用数值模拟结合实验验证的方法,对聚丙稀（PP）注射成型（保压和不保压）冷却过程实验和数值模拟进行分析。用数据采集器对不同共混物注射冷却过程中的温度变化进行数据采集,并将采集所得温度的实验值与根据改进焓法用Matlab软件对聚丙烯冷却过程中温度分布进行数值模拟计算所得的值进行了比较分析,结果表明聚丙烯在液体冷却段温度分布的实验值与理论值几乎完全吻合,在结晶段和固体冷却段实验值略有不同。%Via the numerical simulation coupled with experimental measurements,the polypropylene（PP） was injected in the packing and unpacking injection molding.Under some assumptions,the temperature profiles were numerically solved through the mathematical software package MATLAB.The model was tested by measuring the temperature profiles in a slab mold instrumented with a thermocouple.Measurements of temperature profiles show good agreement with the numerical prediction during the liquid cooling stage,whereas the theoretical values are a little different with the experimental in phase change stage as well as solid cooling stage.