摘要
根据水辅助注塑技术应用短射法成型中空圆管制品的聚合物熔体流动的基本特征,把水辅助注塑充模阶段聚合物熔体流动行为简化为等温条件下幂率流体的稳态流动,应用流体力学理论,对圆管水辅助注塑中影响制件壁厚的因素进行分析。结果表明,制件的壁厚主要由水与熔体界面处的压力梯度和熔体前端压力梯度的比值确定,同时制件壁厚也受熔体的流变性能影响。
Based on the basic characteristic of melting flow behavior during filling molding stage when a round and straight tube is produced with the short-shot water-assisted injection molding, the melting is assumed to be isothermal and steady flow. Based on the theory of fluid mechanics, the affecting factors of wall thickness were analyzed through analytical method, taking a round tube as example The analysis shows that wall thickness is influenced by the ratio between the pressure gradient of the melt at the back interface and that of the anterior melt mainly. At the same time, the rheological properties of the melt have important effect on the thickness ratio.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第7期20-23,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金青年基金资助项目(10602018)
关键词
水辅注塑
制件壁厚
压力梯度
流变性能
water-assisted injection molding
wall thickness
pressure gradient
rheological properties
