B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/689
B29C 45/14 (2006.01) B29C 45/26 (2006.01) B29C 45/64 (2006.01) B29C 67/24 (2006.01) B29C 70/48 (2006.01) B29C 70/54 (2006.01)
Patent
CA 2031943
ABSTRACT Reaction injection molding apparatus for forming a fiber-reinforced molded article comprises a male die plunger and a female die part relatively movable between open and closed mold positions. The female part has an upwardly opening die cavity, a surface around the cavity for supporting a batt of fibrous reinforcing material overlying the cavity, and a shearing edge defining the periphery of the cavity opening. A clamp operates to clamp peripheral portions of the batt to the supporting surface, whereupon the die plunger is moved into the die cavity to press the overlying portions of the batt thereinto and into a mold formed between the male plunger and sidewalls of the cavity. A cutter, also movable into the opening of the die cavity, has a shearing edge that cooperates with the first named shearing edge to shear excess portions of the batt at said periphery from the portions within the cavity and also to seal the mold for the subsequent injection of reactive chemicals into the mold, whereby 37,779-F the batt therein is impregnated with the chemicals to form a fiber-reinforced article upon hardening of the reactive chemicals. 37,779-F
Gamache Ronald R.
Waszeciak Douglas P.
Smart & Biggar
The Dow Chemical Company
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