Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1990-09-05
1992-05-19
Jones, W. Gary
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 464, 264276, B29C 6722
Patent
active
051146398
ABSTRACT:
In a process and apparatus for the production of a foamed-backed cushion portion comprising a foam core and a cover, a cover portion is introduced into a first mold portion of a mold. The cover portion is secured in position between the first mold portion and a second mold portion along peripherally extending contact portions therebetween, the mold forming a mold cavity when closed. A reaction mixture introduced into the mold cavity foams up and fills the mold cavity and is thus joined to the cover portion. To prevent air from passing out of the mold cavity between the contact portions the mold is sealed in the region of the contact portions by means of a flow of a gaseous flow agent which is directed from the contact portion of at least one mold portion towards the oppositely disposed contact portion of the other mold portion. An elastically yielding sealing element may be provided between the mold portions to improve the sealing action.
REFERENCES:
patent: 3943215 (1976-03-01), Grune et al.
patent: 4959184 (1990-09-01), Akai et al.
patent: 4971541 (1990-11-01), Onnenberg et al.
patent: 4976414 (1990-12-01), Yanagishita
Kurz Helmut
Stoeberl Martin
Grammer AG
Jones W. Gary
Kuhns Allan R.
Lillie Raymond J.
Olstein Elliot M.
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