CONTROL TEMPERATURE BLOW STICK FOR INJECTION MOLD APPARATUS

摘要

An improved blow stick for receiving and forming a thermoplastic parison within an injection mold and includes elongated core forming member having a bore therethrough. A second hollow member is carried within said bore and is provided with an exterior surface which mates with the surface of the bore to form cooling passages for the circulation of a cooling fluid. Additionally, sources of cooling fluids and expansion fluids are connected to said cooling passages and to said hollow member for respectively transferring heat from a parison formed on the core forming member and for subsequently expanding the parison against an expansion mold.