Process and apparatus for the production of a component comprisi

Details Process and apparatus for the production of a component comprisi Process and apparatus for the production of a component comprisi

1991-02-07

1992-05-12

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 468, 264254, 264338, B29C 6722

Patent

active

051125420

ABSTRACT:
In a process and apparatus for the production of a component including a support element and foam portions adhering to the top and bottom surfaces thereof, the support element is arranged with its bottom surface over a first mold cavity of a mold. A cover is then sealingly fixed on the mold in such a way that a second mold cavity is defined between the cover and the support element. A first reaction mixture is introduced into the second mold cavity and reacts to form a first foam portion on the top surface of the support element. The cover with support element and first foam portion are then removed from the first mold cavity. Thereupon a second reaction mixture is introduced into the first mold cavity which is then immediately sealingly closed again by the unit consisting of the cover and the support element with its first foam portion. The second reaction mixture reacts to fill the first mold cavity, forming the second foam portion which is mechanically firmly bonded to the bottom surface of the support element. The mold cover can then be removed from the mold, followed by removal of the finished component.

REFERENCES:
patent: 3534129 (1970-10-01), Bartel
patent: 4420447 (1983-12-01), Nakashima
patent: 4544126 (1985-10-01), Melchert
patent: 4806088 (1989-02-01), Busch et al.
patent: 5011394 (1991-04-01), Katagiri et al.

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