聚砜医疗干粉吸入器底座成型与注塑模设计  

Injection Molding and Mould Design for Base of Medical Dry Powder Inhaler Made of Polysulfone

作　　者：石峰 王伟伟 邹锋[1] 朱超挺 周天绮 Shi Feng;Wang Weiwei;Zou Feng;Zhu Chaoting;Zhou Tianqi(Zhejiang Pharmaceutical College,Ningbo 315100,China;School of Mechanical and Electrical Engineering,Zhejiang Business Technology Institute,Ningbo 315012,China)

机构地区：[1]浙江医药高等专科学校,浙江宁波315100 [2]浙江工商职业技术学院机电工程学院,浙江宁波315012

出　　处：《工程塑料应用》2021年第3期91-96,共6页Engineering Plastics Application

基　　金：浙江省基础公益研究计划项目(LGF20E050002);浙江工商职业技术学院科研基金项目(2020Z05,2020Y03)。

摘　　要：使用聚砜(PSU)塑料注射成型医疗干粉吸入器底座塑件。成型前,对PSU材料进行干燥处理的工艺参数为温度125~135℃,时间4~6 h,平铺,铺料厚度18~22 mm,含水量控制在0.1%以下。针对塑件的注射成型设计了1副一模一腔热流道两板注塑模具,使用单点热浇口进行浇注;模具分2次分型打开,1次用于塑件定模侧斜孔的抽芯脱模,1次用于塑件模腔的打开;型腔的表面粗糙度为0.4以上,排气孔的深度应控制在0.08 mm;针对塑件14个斜孔内壁的脱模,设计了定模斜杆复合顶出机构,针对14个斜孔外壁的脱模,设计了动模“万能斜顶”复合机构。运用CAE分析获得了模具中所需的成型时间为1.542 s,注塑压力为58 MPa。塑件成型后须退火处理,控制参数为空气浴,温度150℃,时间2~4 h。The injection molding for base plastic parts of medical dry powder inhaler were done with polysulfone plastic.Before molding,the drying process parameters of polysulfone were as follow,the drying temperature/time was 125-135℃/(4-6 h),the way of paving materials was tiling,the thickness of paving materials was 18-22 mm,and the water content was controlled below 0.1%.In the injection molding of plastic parts,a kind of hot runner two-plate injection mould which has one mould with one cavity was designed.In the mould,the single point hot-gate was used for gating,the mould was opened twice,one for core-pulling and demoulding of the angled hole of the fixed mould,and one for opening of the mould cavity.The surface roughness of the mould cavity is above 0.4,the depth of air vent should be controlled 0.08 mm.For demoulding the inner walls of 14 angled holes of the plastic parts,the angle bar composite ejection mechanism on fixed mould was designed,and for demoulding the outer walls of 14 angled holes,the"universal lifter"composite mechanism on moving mould was designed.The CAE analysis showed that the molding time was 1.542 s and the injection pressure was 58 MPa.The plastic parts must be annealed after molding,the control parameters were:air bath,temperature 150℃,time 2-4 h.

关 键 词：医疗塑件 聚砜塑料 热流道 注塑工艺 模具设计 脱模 

分 类 号：TG243[金属学及工艺—铸造]