토글식 전동사출성형기의 타이바 변형에 관한 연구

A Study on Tie-Bar Deformation of Toggle Type Electric Injection Molding Machine

Injection molding machine plays an important role in making plastic parts. Plastic resin is used to connect barrel to nozzle in injection unit, and new product is made according to this mold pattern. Precise plastic manufactures are being used in lots of industry areas recently. So the performance of injection molding machine’s control system, such as reproducibility, repeatability, etc. is widely studied nowadays. This thesis proposed the relation between the deformation of platen caused by clamping force and the bending stress, elongation at the tie-bar in Toggle type injection molding machine. Results showed that the bending stress of the tie-bar caused by platen deformation is less than 17.2% of average tensile stress. Through the reliability evaluation of the most important terms of injection unit, the method of evaluating the tie-bar elongation is proposed and verified.