Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – With carbonizing – then adding carbonizable material and...
Reexamination Certificate
2005-09-06
2005-09-06
Staicovici, Stefan (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
With carbonizing, then adding carbonizable material and...
C264S029600, C264S029700, C264S081000, C264S102000, C264S257000, C264S258000
Reexamination Certificate
active
06939490
ABSTRACT:
Molding apparatus for rapid transfer of molten resin or pitch in an infiltration molding process. The apparatus includes e.g. an extruder (4) for melting and conveying a resin or pitch and a mold (10) arranged so that resin or pitch is conveyed to a mold insert cavity (19) within the mold. The mold insert contains an internal protrusion such as a locating ring (25) for positioning a porous body (1, 18) within the mold insert cavity in a position that brings about unidirectional flow of the molten resin or pitch through the porous body. Also, rapid resin or pitch infiltration molding process that includes injecting a high melting point, high viscosity, molten resin or pitch into the mold to effect a unidirectional impregnation of a heated preform via a pressure gradient in the mold.
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J. L. White et al., “A Processing Window for Injection of Mesophase Pitch into a Fiber Preform”, Carbon, vol. 32, No. 2, 1994, pp. 301-310.
La Forest Mark L.
Soos Barry P.
Wahlers Christopher S.
Honeywell International , Inc.
Palguta Larry J.
Staicovici Stefan
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