Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1976-11-01
1978-02-21
Hoag, Willard E.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264250, 264255, 264259, 264322, 264329, 264328, B29C 1704, B29D 900, B29F 100
Patent
active
040752666
ABSTRACT:
Process for coating foil material of any desired shape with an injectable and pressable mass which stabilizes the foil material. An initially planar heated foil material is pressed by means of a depressor against a movable mold member of an injection mold having a movable mold member and a stationary mold member, with the injection mold having a shape which corresponds to the later shape of the foil material. The foil material is then pulled against the surface of the movable mold member by subatmospheric pressure. Subsequently, the movable mold member is moved toward the stationary mold member of the injection mold to provide a gap between the foil material and stationary mold member and the mass is slowly injected into the gap remaining between the foil material and the stationary mold member. The two mold members are further closed to finally distribute the mass over the foil material and press the mass to the required thickness. An apparatus is provided for practicing this method.
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patent: 3944645 (1976-03-01), Farrell
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