基于热流道技术的后视镜基座注塑模设计
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摘要
以汽车的后视镜基座为研究对象,分析了汽车后视镜基座注塑模具的关键技术和设计过程,针对热流道模具设计中常见的缺陷,设计了整套热流道液压抽芯的汽车后视镜基座注塑模具。基于对注塑模具的结构和成型零件、温控和定位导向系统、进胶系统以及侧抽芯结构、脱模结构和排气系统的综合分析,可以将热流道技术、液压抽芯技术应用到后视镜基座注塑模具中,采用热流道系统设计既有助于压力的传递,从而降低了注射压力,达到减小内应力的目的,也可以减轻塑件因为注胶不全而出现的不良情况,达到降低废品率的目的。针对汽车后视镜基座塑件的结构设计了热流道侧向抽芯机构,从根本上解决了热流道注塑的困难问题。在生产实践过程中,模具工作稳定,安全可靠。
Based on the automobile rear-view mirror base,the key technology of injection mold and the design process were analyzed. For the common defects in the design of hot runner,hot runner design hydraulic core-pulling automobile rearview mirror base of injection mold was designed. The structure of injection mold and molding parts,temperature control and guide system,into the adhesive system and side core-pulling structure,demoulding structure and exhaust system had been analyzed. Due to the analysis,the hot runner technology,hydraulic core-pulling technology were applied to the rear-view mirror base in injection mold. The use of hot runner system design was also helpful to pressure transmission,the injection pressure and the internal stress were reduced. The plastic parts for injecting insufficiency and adverse circumstances could also be reduced to decrease rejection rate. The hot runner side core-pulling mechanism was designed for the plastic structure of the automobile rearview mirror base,which fundamentally solved the difficult problem in hot runner injection molding. In the process of production practice,the mold was stable,safe and reliable.
Based on the automobile rear-view mirror base,the key technology of injection mold and the design process were analyzed. For the common defects in the design of hot runner,hot runner design hydraulic core-pulling automobile rearview mirror base of injection mold was designed. The structure of injection mold and molding parts,temperature control and guide system,into the adhesive system and side core-pulling structure,demoulding structure and exhaust system had been analyzed. Due to the analysis,the hot runner technology,hydraulic core-pulling technology were applied to the rear-view mirror base in injection mold. The use of hot runner system design was also helpful to pressure transmission,the injection pressure and the internal stress were reduced. The plastic parts for injecting insufficiency and adverse circumstances could also be reduced to decrease rejection rate. The hot runner side core-pulling mechanism was designed for the plastic structure of the automobile rearview mirror base,which fundamentally solved the difficult problem in hot runner injection molding. In the process of production practice,the mold was stable,safe and reliable.
引文
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[3]卫春娟、池成忠、赵日红,等.角接触球轴承保持架注塑模设计[J].工程塑料应用,2014,42(1):75-77.
[4]王成.薄壁螺纹弧形抽芯塑件的模具结构设计[J].中国塑料,2014,38(9):97-102.
[5]唐志玉.大型注塑模具设计技术原理与应用[M].北京:化学工业出版社,2004.
[6]肖国华,程方启,卢星星,等.汽车后视镜面壳热流道二次侧抽芯滑块模具结构设计[J].工程塑料应用,2014,42(10):79-83.
[7]周细枝,钱应平,刘秋菊.高效自动脱螺纹及凝料注射模具设计[J].塑料工业,2008,36(11):33-34
[8]郑爱权.多特征脱模机构与模板开闭控制机构设计[J].塑料,2017,46(6):52-56.
[9]刘丹,钱应平,易国锋,等.基于Moldflow的汽车后视镜座注塑模具优化设计[J].塑料,2014,43(5):95-97.
[10] CHEOK B T,NEE A Y C. Trends and developments in the automation of design and manufacture of tools for metal stampings[J]. Journal of Materials Processing Technology,1998,75(1/2/3):240-252.
[11]陆建军,徐伟.车门外边挡条双色注塑模具设计[J].塑料,2018,47(1):81-83.
[12]徐春林,周建文.基于变形预补偿的汽车水室注射模具设计[J].塑料,2018,47(2):103-107.
[13]吴修德,陈慧敏,徐自立.工程材料[M].武汉:华中科技大学出版社,2011:270-273.
[14]王建华,徐佩弦.注射模的热流道技术[M].北京:机械工业出版社,2006.
[15]陈中一.热固性塑料模塑成型工艺[M].杭州:浙科学技术出版社,1985.