Cushion

The material remaining in the barrel, in front of the screw, after the mold filling and pack stages of the injection process is called the cushion.  Having a cushion ensures that the screw does not bottom out against the front of the barrel, thereby preventing control of packing. Cushion is critical for most parts to assure they can be properly packed out.

cushion

WE'RE HIRING! AIM is hiring an Injection Molding Process Instructor  Learn More