Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1991-06-24
1995-02-21
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264219, 264327, B29C 6722
Patent
active
053913370
ABSTRACT:
A method for making expandable foam patterns for use in an evaporative casting process includes 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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Kearney Dolores C.
Matz Bruno
Ford Motor Company
Kuhns Allan R.
Malleck Joseph W.
May Roger L.
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