模具技术Issue(4)：43-47,5.
无尘板擦板体—板盖组件注塑成型工艺分析
Analysis on injection moulding of dust-free board body-board cover eraser
摘要
Abstract
The dust-free board erasers made of polypropylene can be used in the school daily teaching to avoid the dust caused by traditional hard board erasers and chalks. The body and cover of this board erasers were different shaped parts. To reduce the number of the moulding product die as well as the cost, we designed the plastic injection mould of one die with two cavity to mould board body and cover at the same time, but it was difficult to solve the problem of runner balance. To ensure the quality and requirements of the components of board body and cover, Firstly, the reasonable gate locations at the components of board body and cover are determined by gate location module of Moldflow. Then set the balance constraint conditions and did iterative calculation to fix the reasonable section dimension of each flow path to obtain flow balance. The result shows that the method will improve the melt's unbalance flow in the cavity and prevent the over pressure preservation defect etc. caused by unbalance flowing. So it can apparently improve the quality of the product, reducing defected products, decreasing the cost and shortening the production cycle.关键词
无尘板擦/板体—板盖/注塑成型/模具/MoldflowKey words
dust-free board eraser/ board body-board cover/ injection molding/ mould/ Moldflow分类
矿业与冶金引用本文复制引用
董海东,宁煜,史妮君..无尘板擦板体—板盖组件注塑成型工艺分析[J].模具技术,2012,(4):43-47,5.基金项目
中国高等教育研究会“十二五”规划立项课题“高职模具专业技能培训与社会服务创新实践研究”的阶段性成果(GZYLX2011219) （GZYLX2011219）
陕西工业职业技术学院2011年立项院级课题“可吸尘黑板擦的开发与制造”的阶段性成果(ZK-07). （ZK-07）
