Process for producing double-layered structures

Details Process for producing double-layered structures Process for producing double-layered structures

1984-09-13

1987-01-20

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264545, 156145, 156156, B29C 4320, B29C 4922, B32B 110

Patent

active

046379096

ABSTRACT:
The process for the production of double-walled mouldings for the reduction of sound in vehicles and engines in general by means of a single pressing operation consists in introducing into a compression mould a double package, each individual package consisting of a layer of prepolymer fibres and a foil of thermoplastics material. The foils of the individual packages are situated facing one another and a medium under pressure is blown in between these foils, in order to cause each package layer to be pressed against the internal face of the corresponding half-mould. The compression mould is heated to a temperature which is sufficient to cause complete melting of said foil and complete polymerization of said prepolymer fibres.

REFERENCES:
patent: 3281301 (1966-10-01), Bolesky
patent: 3490973 (1970-01-01), Graff et al.

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