汽车油泵盖组合式抽芯机构注射模设计  

Design of Injection Moldfor Combined Core-Pulling Mechanism of Automobile Oil Pump Cover

作　　者：毛江峰[1] 毛建冬 MAO Jiangfeng;MAO Jiandong(Zhejiang Industry Polytechnic College,Shaoxing,Zhejiang 312099,China;Zhejiang Business and Technology Institute,Ningbo,Zhejiang 315412,China)

机构地区：[1]浙江工业职业技术学院,浙江绍兴312099 [2]浙江工商职业技术学院,浙江宁波315412

出　　处：《塑料》2024年第5期66-71,共6页Plastics

摘　　要：采用POM材料对某燃油泵盖塑件进行注射成型。模具设计的难点为模腔充填困难、成型精度和尺寸稳定性要求高、难以脱模等。因此,采用1模1腔布局,保证尺寸精度达到MT3级,并且,精度稳定性较好;还需要开设直接浇口,模腔得到充分充填;主要成型件及滑块均设置Φ8mm的水路,模腔得到均衡冷却,保证尺寸精度的稳定性;除此以外,设计了8个滑块抽芯机构,用于局部复杂特征的脱模。机构中设计了一种二次抽芯滑块复合机构和一种复合式顺序抽芯滑块机构。二次抽芯滑块复合机构中,先由斜导柱驱动第一次抽芯滑块抽芯,再由油缸驱动完成第二次抽芯滑块的抽芯和2个复合滑块的移位,解决了外壁上交叉特征的脱模难题。复合式顺序抽芯滑块机构中,先由油缸驱动第一次抽芯滑块完成抽芯,同时解除第二次抽芯滑块的限位,然后,第二次抽芯滑块再完成抽芯,解决了塑件中交叉内孔的脱模难题。POM material was selected for injection molding of a plastic part of a fuel pump cover.The difficulties in mould design include difficulty in filling the mold cavity,high requirements for forming accuracy and dimensional stability,and difficulty in demoulding.Therefore,adapt layout of one mould with one cavity of to ensure that the dimensional accuracy reached MT3 level and the accuracy stability was good;Set a direct gate to ensure sufficient filling of the mould cavity;The main molded parts and sliders were equipped withΦ8 mm water channels to achieve balanced cooling of the mould cavity to ensure dimensional accuracy stability;Designed 8 sliders core pulling mechanisms for demoulding complex local features.A two-times core pulling slider composite mechanism and a composite sequential core pulling slider mechanism were designed in the mould.In the two-times core pulling slider composite mechanism,the first core pulling slider was driven by the angle pin,and then the second core pulling slider and the displacement of the two composite sliders were completed by the oil cylinder,solving the demoulding problem of cross features on the outer wall.In the composite sequential core pulling slider mechanism,the first core pulling slider was driven by the oil cylinder to complete the core pulling,and the limit of the second core pulling slider was released.Then,the second core pulling slider completed the core pulling again,solving the problem of demoulding the intersecting inner holes on the plastic part.

关 键 词：汽车油泵 泵盖 注射模设计 交叉抽芯 复合机构 滑块 

分 类 号：TQ320.6[化学工程—合成树脂塑料工业]