摘要
调整芯、壳层熔体的注射温度、速率均可降低夹芯注射成型中芯层熔体冲破趋势。利用Moldflow软件的coinjection模块和正交实验法,分析评价如何调整熔体的注射温度和速率可以最有效地降低芯层熔体冲破趋势。实验发现,芯层熔体冲破趋势对芯/壳层熔体黏度比(R)极敏感,通过减小芯层熔体注射温度、增大壳层熔体注射温度或增大壳层熔体注射速率,均可显著降低芯层熔体冲破趋势,且熔体注射温度的影响更为显著;选取的芯、壳层物料假塑性不同,芯层熔体注射速率对芯层熔体冲破趋势的影响效果不同,甚至相反。
The tendency of core-meh breakthrough could be reduced by adjusting temperature or flow rate of core-melt and skin-melt. By means of the co-injection module in the software of Moldflow and orthogonal experiment,it was analyzed and evaluated to prevent core-melt breakthrough most effectively by adjusting temperature or flow rate of core-meh and skin-meh. It was found that the tendency of core-meh breakthrough was sensitive to the viscosity ratio of core-melt to skin-melt,the tendency of core-meh breakthrough could be reduced by reducing the flow rate of core-meh, increasing the temperature of skin-melt,or increasing flow rate of skin-melt,and the effect of melt temperature seemed more significant. When pseudoplasticity of materials of core-meh and skin-meh was different, the effect of flow rate of core-meh on core-meh breakthrough was different, even reverse.
出处
《塑料》
CAS
CSCD
北大核心
2013年第4期28-31,共4页
Plastics
基金
邢台市科学技术研究与发展计划自筹经费(2012ZC016)
关键词
夹芯注射成型
芯层熔体冲破
注射温度
注射速率
假塑性
数值模拟
sandwich injection molding
core-melt breakthrough
injection temperature
injection rate
pseudoplasticity
numerical simulation
