1.衡阳技师学院模具系，湖南衡阳 421001； 2.湖南工业职业技术学院，长沙 410208； 3.浙江工商职业技术学院现代模具学院，浙江宁波 315012
Mould Design of Conical Table Hollow Ring with Circular Revolving Core-pulling Mechanism
Deng Yuanhua1, Xiong Jianwu2, Liang Bei3, Xiao Guohua3
1. Die and Mould Department of Hengyang Technician College, Hengyang 421001, China; 2. Hunan Industry Polytechnic, Changsha 410208, China; 3. School of Engineering, Zhejiang Business Technology Institute, Ningbo 315012, China
Abstract：According to the forming requirement of the conical shell support ring, a single cavity, two plates and multi-point side gate injection mould was designed. The three-point inner wall side gate was used to ensure the balanced injection of the parts and reduce the injection quality defects of the parts. In order to realize the shaping and demoulding of 30 side holes around the whole circle of the outer wall of the plastic parts, a double cylinder synchronously driven circle was designed. There were 15 slider synchronous core-pulling mechanisms. The mechanism used the cylinder to drive two racks to do linear core-pulling action first, thus synchronizing a driving circular drive gear to rotate at a small angle. The driving groove was arranged on the driving gear. Driven by the driving groove, 15 circular arc sliders were driven by the driving pin to rotate core-pulling so as to achieve the synchronous core-pulling of 30 holes on the outer wall of plastic parts. The purpose of core demoulding was reached. The mechanism design was simple, reliable, and the die structure was simple, which was conductive to the reduction of manufacturing cost. It can provide useful reference for the design of the forming die of the same kind of plastic parts.
Keywords：rotary core pulling; die design; demoulding mechanism; circumferential drive; mechanism
Deng Yuanhua，Xiong Jianwu，Liang Bei，et al. Mould design of conical table hollow ring with circular revolving core-pulling mechanism[J]. Engineering Plastics Application，2019，47(9)：98-102.