B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/73 (2006.01) B22C 9/00 (2006.01) B29C 33/02 (2006.01)
Patent
CA 2302976
A mold assembly including moveable mold parts, one of which includes a plurality of hollow cavities. Each hollow cavity forms an outer wall of an elongated, generally annular portion of a molded part and the other mold part includes a corresponding plurality of core elements, which form an inner wall of the same portion of the molded part. Each core is disposed within a corresponding cavity to define a generally annular mold chamber portion for receiving molten material to be molded to form the shape of the portion of the molded part. Each core element includes a cooling apparatus and each cavity includes an outside cavity-cooling device. Each core element includes a first portion made of high strength material and a tip portion made of material having a greater heat diffusivity and heat transfer coefficient than said first portion.
Check John M.
Macrae & Co.
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