Method for forming a product having waved surface by bending a c

Details Method for forming a product having waved surface by bending a c Method for forming a product having waved surface by bending a c

1990-08-21

1992-05-19

Simmons, David A.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

156245, 264285, 264292, 264314, 264319, 264324, 425338, 425345, 425353, 425389, 425406, 425408, 425409, 425419, B28B 300

Patent

active

051146541

ABSTRACT:
For forming a resin-impregnated, fiber reinforced composite material sheet having laminated meshes of fibers into a U-shaped cross section, the sheet is placed onto a stationary forming die and an auxiliary forming die with the fibers of the sheet forming angles of approximately 45.degree. relative to opposite edges of an upper reference forming surface of the stationary die. Then, the sheet is pressed from above by a pneumatically expandable, elastic depressing die, whereby the auxiliary forming die is lowered against a resilient force relative to the stationary forming die. As the sheet is pressed further downwardly by the depressing die, the parts of the sheet which are to form flanges of the product are firmly held between the depressing die and the auxiliary forming die and bent downwards while the parts are subjected to extending forces in directions to prevent creases and lines from being formed by means of auxiliary forming ridges on the auxiliary forming die.

REFERENCES:
patent: 3614811 (1971-10-01), Johnson
patent: 4034054 (1977-07-01), Sauer
patent: 4826420 (1989-05-01), Frey

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