B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/27 (2006.01) B21D 37/08 (2006.01) B21D 37/10 (2006.01) B21D 47/00 (2006.01) B21D 51/00 (2006.01) B23P 15/00 (2006.01) B29C 45/00 (2006.01)
Patent
CA 2138353
A method of making an injection molding melt distribution manifold wherein the melt passage branches through a number of elbows leading to different gates. Each elbow is preformed in a cylindrical plug which fits in a bore in an outer end of the manifold in alignment with a lateral portion of the melt channel. A brazing hole with an upward mouth is drilled in the outer surface of the plug and nickel alloy brazing powder is poured into it. After insertion into the bore in the manifold, the plug is rotated with a suitable tool to a predetermined position with the mouth of the brazing hole pointed downward. The manifold is then heated in a vacuum furnace to integrally braze the plugs in place simultaneously with brazing an electrical heating element in a channel in the manifold. The melt passage is then completed by drilling an outlet bore from the front face of the manifold to the outlet of each elbow.
Gellert Jobst Ulrich
Guenther Hans
Zuest Randy
4437667 Canada Inc.
Mold-Masters Limited
Ridout & Maybee Llp
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