Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By gas forming or expanding
Patent
1988-03-22
1991-01-22
Lorin, Hubert C.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By gas forming or expanding
264334, 264DIG10, 425577, 249145, 249151, B29C 3926, B29C 6720
Patent
active
049869426
ABSTRACT:
A single-piece foam pattern for use in the lost foam casting of a ported cylinder sleeve is formed in a molding tool having a pair of displaceable elements and a removable center core. Ports, of preselected size, shape and location, are defined by movable cores which are extended into position between the displaceable elements and the center core. Following introduction of a molding material, the movable cores are retracted after which the mold elements and center core are separated and the foam pattern is removed.
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Bailey Francis V.
Irgens Christopher R.
Lorin Hubert C.
Outboard Marine Corporation
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