Method and tooling for making evaporative casting patterns

Details Method and tooling for making evaporative casting patterns Method and tooling for making evaporative casting patterns

B - Operations, Transporting

29

C

B29C 35/00 (2006.01) B29C 33/00 (2006.01) B29C 33/04 (2006.01) B29C 33/30 (2006.01) B29C 67/20 (2006.01)

Patent

CA 2068502

FMC 0274 PUS -18- 89-325 Abstract A method for making expandable foam patterns for use in an evaporative casting process comprises assembling a plurality of mold parts of a molding tool having mold walls defining a mold cavity, each mold part having a housing wall separated from the mold wall to form a heat exchange cavity adjacent the mold wall, inserting at least one heat pipe adjacent a mold wall portion, filling the mold cavity formed by the mold parts with expandable foam beads, heating the tool by introducing a fluid heat exchange medium to the heat exchange cavity to heat the cavity for a predetermined time, cooling the tool and separating the mold parts to release the expanded foam pattern.

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