摘要
采用Sanchez-Lacombe晶格理论来预测顺序浇注成型条件下制品的熔接强度,综合考虑了熔接处温度和压力分布对粘结度的影响,并结合数值模拟技术预测了熔接线出现在不同位置时顺序浇注成型制品熔接强度的变化规律.实验表明:预测结果与实际结果吻合良好;制品的熔接强度随阀浇口延迟开启时间的增加而增大,当熔体前锋刚好到达下一个阀浇口时开启此阀浇口,此时熔接强度基本达到了制品没有熔接线处的强度.
The welding strength of the parts fabricated by sequential injection molding was predicted based on the Sanchez-Lacombe lattice theory. Then, by considering the effects of both temperature and pressure distribution in the welding region on the bonding degree, the variation rules of welding strength of the parts in different weld line locations were predicted via numerical simulation. Experimental results indicate that （ 1 ） the predicted rules accord well with the actual ones; （2） the welding strength improves with the delay time of opening the valve gate; and （3） if the downstream valve gate does not open until the melt from the upstream valve gate passes it, the weldline strength is almost equal to that of the part in the location without weld line.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第8期45-48,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
广州市科技计划项目(2007Z2-D9091)
关键词
顺序浇注成型
熔接强度
数值模拟
阀浇口
sequential injection molding
weldline strength
numerical simulation
valve gate
