EFFCTS OF MOLD GATING ON SHRINKAGE AND WARPAGE OF INJECTION MOLDED PARTS

摘要

A laser printer frame, which is one of the tightest tolerance injection-molded parts in a printer, was simulated using injection molding simulation software from Moldflow~R Corporation. The part was simulated with different types of gating, including multi-gate cold and hot runner systems. The simulations were used to predict the part deformation using the different gating options. The optimized gating was determined by minimizing the part's shrinkage and warpage. The optimized gating was used in the production mold for the frame. The predicted part shrinkage and warparge was in good agreement with the actual frame deformation.