Method and apparatus for designing molds, extruder dies and cores

摘要

Simulations are performed for (1) the change in shape of the molten resin when a parison is formed by extruding said resin through the gap between the extruder die and core, (2) the change in shape of the molten resin due to clamping the mold around the extruded parison and blowing compressed air into the parison, and (3) the thermal deformation that will occur in the molded product due to cooling after the molded product, obtained when the molten resin has solidified in the mold, is removed from the mold in a high-temperature state. The shapes of the mold, extruder die and core that will give the desired shape of molded product are determined from the results of these simulations.