Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1988-06-23
1991-09-10
Dawson, Robert A.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 468, 264511, B29C 6722
Patent
active
050471848
ABSTRACT:
A vacuum mold and process for manufacturing a textile-covered cushion. The process broadly comprises back foaming, wherein (i) the cover is placed on the edge of a vacuum molding part at least partly containing a mold cavity and is stretched before a vacuum is applied to the mold cavity, (ii) the cover is sucked into position, (iii) a foamable reaction mixture is then applied to the back of the cover and (iv) when the reaction mixture has set to form the foam core, the cushion is removed from the mold, the improvement wherein prior to the application of the vacuum to the mold cavity, the cover is brought into contact with at least one moveable section of the wall of the mold cavity as it is positioned over the mold cavity, the cover is fixed to this section and the section together with the cover fixed thereto is then moved into the molding position.
REFERENCES:
patent: 3337664 (1967-08-01), Lyon
patent: 3943215 (1976-03-01), Grune et al.
patent: 4087224 (1978-05-01), Moser
patent: 4501541 (1985-02-01), Bethell et al.
patent: 4761257 (1988-08-01), Bunn
Busch Ralf
Onnenberg Volker
Bayer Aktiengesellschaft
Dawson Robert A.
Gil Joseph C.
Kuhns Allan R.
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