INJECTION MOLDING COOLING CORE AND METHOD OF USE

摘要

An injection molding cooling core (10) comprises an elongated, hollow core pin (15) having an inner surface (16) and an outer surface (17). The core pin (15) is open at one end, and has an end cap (18) at an opposite end. The core (10) also has an elongated, hollow insert (20) having an inside surface (21) and an outside surface (22). The insert (20) has a plurality of protrusions (25) on the outside surface (22), which extend radially outwardly from the insert (20). The insert (20) is designed to fit within the core pin (15) whereby the protrusions (25) contact the inner surface (16) of the core pin (15). The protrusions (25) are metallurgically joined to the core pin (15) whereby there is a continuous metallurgical path for heat transfer between the outer surface (17) of the core pin (15) and the insert (20). The protrusions (25) also provide strength to the core pin (15) and a great enhanced heat transfer surface.