Plastic helmet liner mould

Helmet shell products shall be designed with streamlined structure to reduce wind resistance and noise, thickness of rubber parts (general 2.5mm-4.5mm) should be enough to ensure sufficient impact strength;  The wall thickness of plastic parts should be as uniform as possible, and there should be no right angles, sharp angles and acute angles to prevent potential safety hazards. It is not good for hand feeling and easy to scratch hands when using, and is not conducive to the control of injection molding and appearance quality.  

Special points of helmet mold design  

1. it is necessary to use the main gate of the center, there are three kinds of external cold runner, internal cold runner and semi-hot runner (there are also a few side sprue, there will be water clamp);  

2. the mold cavity, the core is best to use convex and concave structure of the new design concept is better injection molding;