摘要
根据汽车前保险杠外形尺寸大、分型面复杂、侧边装配孔多、内部扣位多的结构特点和技术要求,设计了一套热流道成型的复杂抽芯注塑模具。通过采用侧向抽芯机构、斜顶脱模机构和导向定位机构,成功解决了多方向扣位脱模难的问题;采用“顶针板油缸+直顶杆(推块)+斜顶杆”组合脱模机构,成功解决了因推杆复位不良导致和滑块相撞问题;通过采用组合式的冷却水路结构和水冷温度控制系统,将注射周期缩短了15%;模具各机构先进合理,成型塑件尺寸精度达到了MT3的设计要求,通过了各项实验测试。
According to the structural characteristics and technical requirements of automobile front bumper,such as large size,complex parting surface,many side assembly holes,and many internal buckles,a set of complex core pulling injection mold for hot runner molding was designed.By adopting side core pulling mechanism,inclined top demoulding mechanism and guiding positioning mechanism,the problem of difficult demoulding in multi-directional buckle position was successfully solved;“ejector plate oil cylinder+straight top bar(push block)+inclined top bar”combined demoulding mechanism was used to solve the problem of collision with slide block due to poor reset of push rod;temperature control system was improved,and injection cycle was shortened by 15%.Each mechanism of the mould is advanced and reasonable,the dimensional accuracy of the molded plastic parts can meet the design requirements of MT3,and can pass various experimental tests.
作者
温煌英
赵利平
刘付国宇
Wen Huangying;Zhao Liping;Liu Fuguoyu(GuangDong University of Science&Technology,Dongguan 523000,China;Dongguan Weiyuan Hardware Co.,Ltd.,Dongguan 523000,China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2020年第3期98-103,共6页
Engineering Plastics Application
关键词
汽车前保险杠
热流道
精密组合模芯
侧向抽芯机构
斜顶脱模机构
front bumper
hot runner
precision modular core
lateral core-pulling mechanism
inclined top demoulding mechanism
