초록 ▼

A female die part has an upwardly opening die cavity for receiving a male die plunger, a supporting surface around the cavity for a porous batt of fibrous reinforcing material overlying the cavity, and a first shearing edge defining the periphery of the opening for the cavity. Peripheral portions of

A female die part has an upwardly opening die cavity for receiving a male die plunger, a supporting surface around the cavity for a porous batt of fibrous reinforcing material overlying the cavity, and a first shearing edge defining the periphery of the opening for the cavity. Peripheral portions of the batt are clamped to the supporting surface, whereupon the die plunger presses portions of the batt into a mold formed between the male plunger and the sidewalls of the cavity to completely fill the mold. A cutter having a second shearing edge cooperates with the first shearing edge to shear peripheral portions of the batt from the portions overlying the die cavity. The shearing edges in cooperation with the die plunger seal the mold to enable injection of reactive chemicals that impregnate the porous batt within the mold.

대표청구항 ▼

A reaction injection molding apparatus for forming a fiber reinforced molded article from an impregnatable batt of fibrous material, said apparatus comprising a female die part having an upwardly opening die cavity, first shearing edge defining the periphery of the opening into said cavity, and a la

A reaction injection molding apparatus for forming a fiber reinforced molded article from an impregnatable batt of fibrous material, said apparatus comprising a female die part having an upwardly opening die cavity, first shearing edge defining the periphery of the opening into said cavity, and a landing surface around said periphery of supporting peripheral portions of said batt overlying said opening; clamping means selectively operative for clamping said peripheral portions against said landing surface; shearing means movable into said cavity and having a second shearing edge cooperable with said first shearing edge for shearing said peripheral portions from a central portion of said batt overlying said opening; a male die part having a die plunger movable through said opening to a closed position within said die cavity to provide a mold cavity between said plunger and the wall of said die cavity, said plunger and shearing means cooperating to press said central portion into said die cavity and fill said mold cavity with said fibrous material when said plunger is at said closed position; said shearing means cooperating with said first shearing edge and said male die part at said closed position to seal said opening; and means for injecting reactive chemicals into said mold cavity to impregnate said batt with said chemicals when said male die part is at said closed position.