Gate seal time is an important aspect of the packing phase that needs to be understood to produce high quality molded parts. Setting proper gate seal time plays a key role in packing parts. Properly packed parts will have even internal polymer molecular structure, fewer volumetric shrinkage differences, optimized part dimensions, and fewer sink marks and voids.
This lesson covers the factors that influence gate seal time, gate size and process range: injection pressures, clamp tonnages, and gate seal times, and practical steps for setting proper gate seal time.