高铁机车低压润滑油控制阀盖注射模设计  

Design of Injection Mold for High-speed Railway Locomotive Low Pressure Lubricating Oil Control Valve Cover

作　　者：郭晓昕[1] 张云[2] 熊建武[2,3] 陈黎明 胡智清 Guo Xiaoxin;Zhang Yun;Xiong Jianwu;Chen Liming;Hu Zhiqing(Baotou Railway Vocational&Technical College,Baotou 014060,China;Hunan Industry Polytechnic,Changsha 410208,China;Hunan General Aviation Vocational College,Shaoyang 422000,China;Hunan Financial Industrial Vocational-Technical College,Hengyang 421002,China)

机构地区：[1]包头铁道职业技术学院,内蒙古包头014060 [2]湖南工业职业技术学院,长沙410208 [3]湖南通用航空职业学院,湖南邵阳422000 [4]湖南财经工业职业技术学院,湖南衡阳421002

出　　处：《工程塑料应用》2023年第7期96-102,共7页Engineering Plastics Application

基　　金：内蒙古自治区教育厅科学研究项目(NJSY19351);内蒙古自治区教育厅科学研究项目(NJZY20183);内蒙古自治区教育厅“十三五”规划课题(NZJGH2019172)。

摘　　要：低压润滑油控制阀盖塑件是高铁机车上润滑油控制阀门壳体上设置的以塑代钢零配件,塑件使用改性丙烯腈-丁二烯-苯乙烯塑料(ABS)注塑成型。使用单腔布局使塑件的成型精度达到了MT4(GB/T14486-2008)生产要求。使用点浇口浇注系统避免了主浇道的偏心设置,有效地缩减了模具长宽尺寸,降低了模具对注塑机模板的长宽尺寸的要求。创新设计的哈夫斜顶机构使塑件上5个快速接口外壁的环形倒扣顺利实现自动脱模,哈夫斜顶机构通过方形推杆推动1组2个哈夫斜顶在完成顶出塑件的同时,对环形倒扣实施侧向抽芯。模具结构布置依据塑件的结构特点而展开,使用4次开模三板结构模架来驱动机构组件完成塑件和流道废料的自动脱模。塑件的脱模通过塑件的正面脱模和反面脱模分别进行,正面脱模使用定模推板机构推动1个普通斜顶、3个哈夫斜顶机构实现,反面的脱模通过2个油缸斜抽芯机构、2个圆柱镶件抽芯机构、2个哈夫斜顶机构和4个顶针元件的先后动作来实现。The plastic parts of the low-pressure lubricating oil control valve cover were plastic parts instead of steel parts set on the lubricating oil control valve housing of high-speed railway locomotives.The plastic parts were molded with modified acrylo‐nitrile butadiene styrene(ABS).The use of single cavity layout made the molding accuracy of plastic parts meet the production requirements of MT4(GB/T 14486-2008).The use of the point-gate gating system avoided the eccentric setting of the main runner,effectively reduced the length and width of the mold,and reduced the requirements of the mold on the length and width of the injec‐tion molding machine template.The innovative design of the Half lifter mechanism enabled the automatic demoulding of the annular undercuts on the outer wall of the five quick interfaces on the plastic parts.The Half lifter mechanism pushed a group of two Half lifters through the square push rod,while completing the ejection of the plastic parts,to implement the lateral core-pulling of the annular undercuts.The mold structure was arranged according to the structural characteristics of the plastic parts,and the three-plate structure mold base was used to drive the mechanism components to complete the automatic demoulding of the plastic parts and runner waste.The demoulding of the plastic parts was carried out through the front demoulding and the reverse demoulding of the plastic parts respectively.The front demoulding was realized by using the fixed mold push plate mechanism to push 1 ordinary inclined top and 3 Half lifter ejecting mechanisms.The reverse demoulding was realized by the successive actions of 2 Hydraulic cylinder angle core pulling mechanisms,2 cylindrical insert core pulling mechanisms,2 Half lifter ejecting mechanisms and 4 ejector pin elements.

关 键 词：丙烯腈-丁二烯-苯乙烯塑料 高铁机车 控制阀盖 注塑成型 模具设计 哈夫斜顶 结构布置 

分 类 号：TG243[金属学及工艺—铸造]