Abstract: As optical electronic equipment is widely applied in the field of aerospace, instruments and meters and consumer electronics, etc, there are various design forms of the display screen and decoration panel of the optical electronic devices. Meanwhile,3D curved shape surface has become a trend. Therefore, compression molding has become one of the most important technologies in the curved glass manufacturing. The critical technology of the compression molding is studied about temperature distribution and the control of temperature and pressure. The simulation model of multi-station molding process is established to simulate the temperature history of glass during the molding process. The heat transfer model of heating plate is built to simulate the temperature distribution of the surface of the heating plate. And a new type of snake heating tube has been optimally designed. The precision temperature control system and precision pressure control system are developed. The results of tests show that the temperature control precision is within ±2℃ and the accuracy of pressure control can reach 0.001 MPa, both of which can meet the requirements of compression molding. Finally a precision multi-station compression molding tool is developed, and the reliable compression molding technological process is established, which sets the foundation for experimental research of compression molding. The experimental results show that the profile tolerance of glass less than 0.01 mm, the surface roughness Ra less than 0.02 μm,and the yield above 90% can be realized by the developed multi-station compression molding tool under the molding temperature of 800℃ and the molding pressure of 0.8 MPa.

Key words: compression molding, curved glass, multi-station molding process, temperature control, temperature uniformity