ABSTRACT
Die sets Injection blow mold tools must be machined to precise tolerances because of their critical function in the overall molding cycle. The parison molds are more critical than the blow molds because they are subjected to direct molding pressures. The core rods, similarly, are subjected to the same conditions as the parison molds and must be concentric to initiate good blowability. Because of the precise machining needed, the selection of proper tool steels to use, and the interrelations of the number of component parts making up the complete injection blow mold tooling, excessive dimensional variations between components cannot be tolerated. Figure 8.1 depicts the tooling necessary at the parison or the injection station on any injection blow molding machine. Additions to the parison injection tooling shown in Figure 8.1 include insulation under the manifold and a separate end cap to the parison cavity mold.
