This utility model provides a pre-formed component for molded flat composite materials, relating to the field of
composite material molding technology. It includes: a base, an equipment box mounted on top of the base, a lower mold installed inside the equipment box, an upper mold mounted on top of the lower mold, and a filter box mounted on one side of the equipment box; an ejection
assembly located inside the lower mold, comprising: an equipment cavity, a
drive motor, a rotating rod, an ejection rod, and an ejection plate; and a purification
assembly located between the equipment box and the filter box, comprising: a gas collection hood, a conduit, an annular
pipe, a filter screen, and an exhaust fan. This design, through the ejection
assembly, allows the component to be ejected from the molding groove after pre-forming, which is convenient, quick, and saves demolding time. The purification assembly also removes and filters harmful gases generated during the molding process, reducing emissions.