Method and apparatus for producing sheet molding compound

Details Method and apparatus for producing sheet molding compound Method and apparatus for producing sheet molding compound

1979-01-10

1980-08-26

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

264313, B29C 1500, B29D 302, B29D 714

Patent

active

042195241

ABSTRACT:
The invention relates to apparatus and method for forming a sheet molding compound. The sheet molding compound is linearly advanced. A moveable upper surface formed by a belt passing around a series of driven rollers is adapted to contact the upper surface of the sheet molding compound. The belt is held in biased relationship to the sheet molding compound. In one arrangement of the invention, the sheet molding compound is caused to undulate vertically while retained in compression to induce one form of shear effect. In still another embodiment, as the molding compound is passed in vertically undulating fashion between compressing mesh belts, one of the belts is driven at a fixed rate, while the opposite is driven at rates oscillating above and below the fixed rate.

REFERENCES:
patent: 2989775 (1961-06-01), Pekarek
patent: 3222439 (1965-12-01), Bolomey et al.
patent: 3568245 (1971-03-01), Jetzer
patent: 3966856 (1976-06-01), Williams

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