摘要
为能水辅助注塑成型壁厚较小且较均匀的聚丙烯弯管,设计了一种自锁式喷嘴,既满足高流量的要求,又可防止熔体堵塞喷嘴。在相同的工艺条件下,分别使用自锁式喷嘴和孔形喷嘴,对成型的弯管壁厚进行比较,结果表明:与孔形喷嘴相比,使用自锁式喷嘴时制品的残留壁厚更小更均匀。此外,使用该自锁式喷嘴,研究了水辅助注塑中注水压力和延迟时间对制品残留壁厚和水穿透长度的影响。
This paper describes the design of a self-locked pin for water-assisted injection molded polypropylene curved pipes, which meets the demand of high flow rate and preventing being stuck by melt. The wall thickness of parts molded using both self-locked and orifice pins were compared under the same processing parameters. The parts molded using the self-locked pin resulted in more uniform and thinner wall thickness. The effects of the water pressure and injection delay time on the wall thickness and water penetration length of parts were investigated using the self-locked pin.
出处
《中国塑料》
CAS
CSCD
北大核心
2008年第3期52-56,共5页
China Plastics
基金
广东省自然科学基金资助项目(06025643)
高等学校优秀青年教师教学科研奖励计划
关键词
水辅助注塑
注水喷嘴
聚丙烯
水穿透长度
残留壁厚
water-assisted injection molding
water injection pin
polypropylene
water penetration length
residual wall thickness
