弯管热流道模具的旋转抽芯脱模设计  

Design of Rotary Core-Pulling Demoulding for Hot Runner Mold of Elbow

作　　者：赵利平[1] 秦瑞亮 侯贤州 张维合[1] 彭新华 ZHAO Li-ping;QIN Rui-liang;HOU Xian-zhou;ZHANG Wei-he;PENG Xin-hua(School of Mechanical and Electrical Engineering,Guangdong University of Science and Technology,Dongguan 523000,China;Maoxin Hardware(Shenzhen)Co.,Ltd.,Shenzhen 518106,China)

机构地区：[1]广东科技学院机电工程学院,广东东莞523000 [2]茂新五金(深圳)有限公司,广东深圳518106

出　　处：《塑料科技》2023年第2期84-87,共4页Plastics Science and Technology

基　　金：东莞市科技特派员项目(20221800500722);2022东莞市工程技术研究中心专项。

摘　　要：根据汽车油箱连接管塑件的结构特点和技术要求,设计了一副复杂抽芯的注塑模具,采用三种不同的抽芯方式。采用普通侧向抽芯机构,解决塑件出模方向单向倒扣的脱模问题。采用二次侧向移动滑块抽芯组合机构,解决塑件出模方向多向倒扣的脱模问题。采用一次侧向移动滑块抽芯+一次油缸驱动的曲柄旋转抽芯组合机构,解决了塑件出模方向多向倒扣及狭长形90°圆弧倒扣的脱模难题。设计的二级热流道直接进胶方式使模具生产时保压压力减少15%以上,成功解决塑件变形、翘曲的问题。多层次的水路设计使模具的成型生产效率提高了10%。模具在实际生产过程中各种抽芯机构运行平稳可靠,塑件的成型品质良好,符合实际生产要求。According to the structural characteristics and technical requirements of the plastic parts of the connecting pipe of the automobile fuel tank, an injection mold with complex core pulling was designed, and three different core pulling methods were adopted. The common side core-pulling mechanism is adopted to solve the demoulding problem of one-way back-off in the ejection direction of plastic parts. The secondary lateral moving slider core-pulling combined mechanism is adopted to solve the demoulding problem of multi-directional back-off in the ejection direction of plastic parts. The combined mechanism of one-time lateral moving slider core-pulling+one-time cylinder-driven crank rotating core-pulling is adopted to solve the demoulding problem of multi-directional back-off and narrow 90° arc back-off in the ejection direction of plastic parts. The designed two-stage hot runner direct feeding method reduces the holding pressure by more than 15% during mold production, and successfully solves the problem of plastic deformation and warpage. The multilevel waterway design improves the molding production efficiency of the mold by 10%. In the actual production process,various core-pulling mechanisms of the mold run smoothly and reliably, and the molding quality of the plastic parts is good, which meets the actual production requirements.

关 键 词：弯管热流道 二次侧向抽芯 油缸 曲柄旋转抽芯 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]