碎纸机塑件外壳大型注塑模具设计  

Paper shredder plastic parts shell large injection mold design

作　　者：赵利平[1] 张小娟 彭新华 ZHAO Liping;ZHANG Xiaojuan;PENG Xinhua(School of Mechanical and Electrical Engineering,Guangdong University of Science and Technology,Dongguan 523000,China;Guangdong College of Hotel Management,Dongguan 523000,China;Maoxin Hardware(Shenzhen)Co,Ltd,Shenzhen 518106,China)

机构地区：[1]广东科技学院机电学院,广东东莞523000 [2]广东酒店管理职业技术学院,广东东莞523000 [3]茂新五金(深圳)有限公司,广东深圳518106

出　　处：《中国塑料》2024年第7期106-111,共6页China Plastics

基　　金：广东科技学院教科创教育相长项目(GKJXXZ2023032);广东科技学院高等教育教学改革项目(GKZLGC2022067);东莞市科技局工程技术研究中心项目(现代模具设计与制造工程技术研究中心20221600402242)。

摘　　要：以碎纸机塑件外壳为研究对象,设计了一副结构复杂的大型热流道塑胶模具。根据塑件的结构特点和使用要求,模具设计两点热咀进胶方式保证进胶的均衡性;采用1个油缸驱动的定模隧道滑块抽芯机构,1个天侧油缸驱动的滑块抽芯机构,1个地侧斜销驱动的滑块抽芯机构,滑块还包括延时弹针设计,5个斜顶抽芯机构,解决塑件所有倒扣的脱模难题。定模采用U形水路设计,动模采用水井均布的方式,滑块上单独水路冷却设计,使模具在实际生产过程中塑件的成型周期和品质均表现优异。模具顶出主要采用直顶块顶出机构的方式配合斜顶完成。Taking the plastic shell of paper shredder as the research object,a large hot runner plastic mold with a complex structure was designed.According to the structural characteristics of the plastic parts and the requirement of use,a twohot‑nozzle‑feeding mode was designed in the mold to ensure the balance of feeding.A sliding block core‑pulling mechanism of female die tunnel driven by an oil cylinder,a sliding block core pulling mechanism driven by an overhead cylinder,a sliding block core‑pulling mechanism driven by a ground side‑inclined pin together with a time‑delay elastic pin,and five inclined pin core‑pulling mechanisms were designed.These designs solved the demolding problem in all of inverted plastic parts.A U‑shaped waterway was designed for the female die.The uniform distribution way for water wells was adopted for the male die,and the water‑cooling system on the slider was separately designed.With such designs,the mold exhibited excellent performance in the molding cycle and quality of plastic parts in the actual production process.The die ejection was mainly completed by a declined pin core‑pulling mechanism and a straight ejecting mechanism.

关 键 词：碎纸机 热流道 注塑模具 抽芯机构 模具排气 水路设计 

分 类 号：TQ320.662[化学工程—合成树脂塑料工业]