汽车旋钮升举螺杆式推板同步推出机构注射模改进设计

Improved Design of Injection Mold for Car Knob with Screw Push-plate Synchronous-pushing Mechanism

分析了汽车旋钮塑件内螺纹脱模后内螺纹变形甚至损坏问题产生的原因,对模具中的脱螺纹机构进行了改进,将螺纹型芯旋转+弹簧推板式内螺纹脱模机构改进为螺纹型芯旋转+升举螺杆式推板同步推出脱螺纹机构,解决了生产中的实际难题。由于推板同步推出,不会像弹簧弹推板那样会对螺纹较细的产品有损坏,从而适合内螺纹较细和螺纹要求较高的螺纹塑件产品。模具结构选用合理,加工装配较为简单,机构设计动作可靠,有效地提高了高品质要求内螺纹塑件的成型质量。

Base on the causes of deformation and even damage of internal thread after demoulding of bottle cap plastic parts were analyzed.The screw core rotation+spring push plate internal thread demoulding mechanism was improved to screw core rotation+lifting screw push plate push plate synchronous push out mechanism,which solved the practical problems in production.As the push plate is pushed out synchronously,it can not damage the products with thin thread like spring spring push plate,so it is suitable for thread products with thin thread and high thread requirements.The mould structure is reasonably selected,the processing and assembly are relatively simple,and the mechanism design action is reliable,which effectively improves the molding quality of the high-quality internal thread plastic parts.