1.浙江工商职业技术学院机电工程学院，浙江宁波 315012； 2.杭州职业技术学院友嘉机电学院，杭州 310018
Optimal Design of Hot Runner Injection Mould with Multi-gate for SUV Instrument Panel
Shen Zhongliang1, Xiao Guohua1, Yang An2
1. School of Mechatronic Engineering, Zhejiang Business Technology Institute, Ningbo 315012, China; 2. Fair Friend Institute of Electromech, Hangzhou Vocational and Technical College, Hangzhou 310018, China
Abstract：A two-plate hot runner injection mould with multi-gate was designed for the plastic parts of a SUV instrument panel. In the mould, 6 hot runner and 12 fan-shaped side-gates were used to gate the mold cavity. In the mould structure, based on the manufacturing cost and the convenience of machining, the following structural optimization designs were made. Firstly, the integral structure was adopted for the molding part to ensure its strength and the convenience of setting the cooling water circuit. Secondly, the structure of the non-standard mould base was simplified, the guide pillar guiding mechanism was canceled, and the inserting rod type guiding mechanism was used for guiding, so as to reduce the repair difficulty of the mould base. Thirdly, the slide mechanism in moving mould was optimized to adopt the driving structure of double angle pins and guide with independent guide strips. Fourthly, the slide mechanism in fixed mould was simplified to the spring slide mechanism, the form of ejector pin + ejector block was adopted in the angled and direct ejection mechanism, so as to simplify the machining and installation. Fifthly, a ejector pin with head split type was designed, which could effectively avoid the use of electrical discharge machining with high cost for the processing of snap-fit foot forming parts. The adoption of above design optimization measures is conducive to the reduction of the overall processing difficulty and cost of the mould.
Keywords：hot runner; mould design; structure optimization; injection molding; demoulding
Shen Zhongliang，Xiao Guohua，Yang An. Optimal design of hot runner injection mould with multi-gate for SUV instrument panel[J]. Engineering Plastics Application，2020，48(10)：86-92.