Our Chinese injection molder can fine-tune the shrinkage of the parts by adjusting the density of the material, i.e.; how they have packed it out and how long they hold it to cool in the tool. Resin manufacturers provide specific formulations for a range of standard flow rates. Using those standard flow rates as a guide, the operator should select an easy flow material for thinly walled products and a stiffer material for thicker walled products. The operator should use the stiffest material possible for thin or thick walled products since a stiffer flow improves the Chinese plastic injection mold's physical properties. However, the stiffer the material is the harder it is to push. Difficult ... more