在低频振动场中注射成型HDPE试样的力学性能及其形态控制

利用自行研制的低频振动注射实验装置探讨HDPE振动注射试样力学性能和微观形态之间的关系 .实验中对常规注射和振动注射成型的试样力学性能和微观形态进行了对比实验 .SEM实验结果显示 ,振动注射制件芯层的形态由常规注射的球晶转变为垂直于振动波传递方向排列的片晶结构 ,在剪切层中同时存在串晶或柱状堆砌的片晶结构 .频率的改变 (0

MECHANICAL PROPERTY AND MORPHOLOGY CONTROL OF INJECTION-MOLDED HDPE IN LOW FREQUENCY VIBRATION FIELD

The self-made low frequency vibration injection-molding device was adopted to explore relationship between mechanical property and morphology for HDPE injected moldings,and the mechanical properties are bettered and the morphology can be controlled in the low frequency vibration force field.In the research the morphology and mechanical properties produced by conventional injection molding(CIM) were used to compare with which obtained via vibration injection molding(VIM).As for the vibration injection molding is concerned,the main vibration processing variables are vibration frequency and vibration pressure amplitude and the effect of tensile strength and morphology influenced by different vibration processing conditions.SE micrographs show the transformation of crystal from spherulite to lamellar is noticed,and the shish-kebab stucture and cylindrite structure were obtained in the shear layer via different vibration injection molding conditions.The changes of frequency (0