INJECTION MOLDING MACHINES AND METHODS FOR ACCOUNTING FOR CHANGES IN MATERIAL PROPERTIES DURING INJECTION MOLDING RUNS

摘要

A method and a machine that account for changes in material properties of molten plastic material during an injection run. If viscosity of the molten plastic material changes during an injection run, a controller alters a step time of the injection cycle to ensure that molten plastic material completely fills and packs a mold cavity to prevent part flaws such as short shots or flashing.