NOZZLE ASSEMBLY FOR INJECTION MOLDING APPARATUS

摘要

A nozzle assembly (10) for use with injection molding apparatus includes an outer sleeve (12) having a relatively large bore extending from an open rearward end forwardly to a substantially closed forward end, and having an injection orifice (22) therein. An inner nozzle tip (14) is located within the sleeve (12), and has a radial flange and an internal bore extending from a rearward opened end to a forward tip having a plurality of flow orifices upstream of the injection orifice. A manifold insert (18) is located within the outer sleeve (12) and includes a through bore in axial alignment with the bore of the nozzle tip (14). The manifold insert (18) has a forward end which receives the nozzle tip (14) and abuts the radial flange. A coil heater (16) is located radially between the manifold and the outer sleeve, a forward end of the coil heater (16) is seated on the radial flange. The manifold insert (18), nozzle tip (14), and coil heater (16) form a subassembly which is easily removed and reinserted vis-a-vis the outer sleeve.