摘要
以聚合物微型机械运动副模内微装配成型为研究对象,研究了二次成型过程参数和微型轴约束对二次成型充填流动诱发的预成型固体微型轴热流固耦合变形的影响规律和机理。结果表明,预成型微型轴的热流固耦合变形随着二次成型熔体注射温度的提高而增加,而随着预成型微型轴在二次成型模腔中二端的约束程度增加而减小;减小二次成型充填熔体的注射温度或增大微型轴约束程度有利于减小二次成型熔体充填流动诱发的预成型微型轴的热流固耦合变形,可提高聚合物微型运动副微装配成型加工精度。
Taking the in-mold micro assembly molding of polymer micro mechanical motion pair as a research object, the effects and mechanisms of secondary molding process parameters and micro axial constraint on the thermal-fluid-structure coupling deformation of preformed micro shaft induced by the secondary molding melt filling flow were investigated extensively. The resulted indicated that the thermal-fluid-structure coupling deformation of preformed micro shaft induced by the secondary molding melt filling flow exhibited an increase with an improvement in secondary molding melt injection temperature, but a decrease with an increase of the constraining degree of two end for the preformed micro shaft in the secondary molding die. The reduction of secondary molding melt injection temperature or the increase of the constraining degree of the preformed micro shaft in the secondary molding die is favorable to the decrease of thermal-fluid-structure coupling deformation of preformed micro shaft induced by the secondary molding melt filling flow. This can improve the in-mold micro assembly forming precision of polymer micro mechanical motion pair.
出处
《中国塑料》
CAS
CSCD
北大核心
2017年第2期72-76,共5页
China Plastics
基金
国家自然科学基金(21464009)
关键词
模内微装配成型
热流固耦合
微型机械
机理
变形
in-mold micro assembly molding
thermal-fluid-structure coupling
micromachine
mechanism
deformation
