Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1991-10-09
1994-05-10
Heitbrink, Tim
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
2643283, 2643285, 425 49, B29C 4500
Patent
active
053105184
ABSTRACT:
A method and device for manufacturing curing bladders (2), whereby a curing mold (3) defines, via a first (4) and second (5) half mold and an inner core (6), an inner molding chamber (7) and an outer injection chamber (34) communicating with the inner chamber (7) and consisting of a variable-volume chamber of an injection cylinder (59); the outer chamber (34) being fed with a mass (35) of heated uncured rubber which is injected into the inner chamber (7) with the mold (3) closed and, when cured, is extracted from the mold (3) by opening the inner chamber (7) and extracting the inner core (6).
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Franzini Marco
Giovannucci Fabrizio
Pomenti Attilio
Tomlinson Gordon M.
Bridgestone/Firestone Inc.
Heitbrink Tim
Thomas D. A.
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