1.长沙航空职业技术学院，长沙 410124； 2.湖南工业职业技术学院，长沙 410208； 3.湖南财经工业职业技术学院，湖南衡阳 421002
Optimum Design of Die Structure for Middle Beam of Air Conditioner Hanger
Zhang Jiafeng1, Xiong Jianwu1, Long Hua２, Hu Zhiqing3
1. Changsha Aeronautical Vocational and Technical College, Changsha 410124, China; ２. Hunan Industry Polytechnic, Changsha 410208, China; 3. Human Financial & Industrial Vocational-Technical College, Hengyang 421002, China
Abstract：According to the difficulty in the structural design of middle beam of air conditioner hanger plastic parts, one mold, one cavity, three plates and injection mold were designed on the basis of optimizing the design of plastic parts. Three point gates were used for balanced injection moulding. In order to simplify the structure of the mould and the demoulding mechanism, the main and secondary parting surfaces were used to partition the plastic parts vertically in the direction of open mold. Six slider mechanisms and three inclined top mechanisms were set up to demould the parts with local characteristics. All the six slider mechanisms adopt the external positioning of the block and the auxiliary driving of the spring pull rod to reduce the occupancy of the space of the die base and the structural size of the die base. In the design of the corresponding slider mechanism, the two-stage tunnel slider structure was adopted, which improves the utilization rate of the space of the die base and helps to reduce the overall cost of the mold. In the fixed mold, a new type of inclined top mechanism of the fixed mold was designed. The mechanism used the spring to drive the inclined top rod to eject the plastic parts from the cavity, so as to realize the purpose of the bending hook characteristics and hole characteristics of the plastic parts and the side core pulling and demoulding of the fixed mold. The mechanism was ingenious in conception and simple in structure, which was conducive to simplifying the mold. The overall structure and mold manufacturing cost were reduced.
Keywords：optimum design; three plate mould; slider mechanism; inclined top mechanism; mould structure
Zhang Jiafeng，Xiong Jianwu，Long Hua，et al. Optimum design of die structure for middle beam of air conditioner hanger[J]. Engineering Plastics Application，2020，48(12)：：81-88.