Apparatus for forming preformed material

Details Apparatus for forming preformed material Apparatus for forming preformed material

1989-04-17

1990-07-24

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

With interposed non-adhering web or sheet type parting means

425390, 425395, 425DIG19, 425DIG60, 264511, 264547, B28B 2138, B28B 2140

Patent

active

049432222

ABSTRACT:
An apparatus is disclosed for the shaping of a sheet of preform material. A flat planar (heated) sheet of preform material is held tightly between two elastomeric sheets of the apparatus, the sheets and preform material forming a laminate assembly. The laminate assembly is then formed about a mold having the desired contours. The elastomeric sheets maintain the preform material parallel to the surface contours of the mold as the molding process proceeds. A fluid such as air is flowed between the mold surface and the laminate assembly during the forming process to prevent the elastomeric sheets from binding on the mold surface. Wrinkles are eliminated in the final shape of the preform material, and fiber distortion or tears or rips in the material are minimized due to the fluid lubrication between the mold surface and the laminate assembly.

REFERENCES:
patent: 2575734 (1951-11-01), Schulman
patent: 2973558 (1961-03-01), Stratton, Jr.
patent: 3492392 (1970-01-01), Kasamatsu et al.
patent: 3923586 (1975-12-01), Gross
patent: 3933562 (1976-01-01), Cruckshank
patent: 4128375 (1978-12-01), Schubart
patent: 4334850 (1982-06-01), Garabedian
patent: 4715923 (1987-12-01), Knoll
patent: 4808362 (1989-02-01), Freeman
Sales Literature of EMC Machinery, P. O. Box 9800, Fort Worth, TX.
"Preforming of Unifilo" by L. Pimini of Vetrotex St. Gobain, pub. in the Reinforced Plastics Congr. 13th, 1986.

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