Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Patent
1978-08-08
1981-05-05
Hoag, W. E.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
264 41, B29C 1700, B29D 2700
Patent
active
042658519
ABSTRACT:
The disclosure is of a process for moulding cellular polycarbodiimide, characterized in that it consists essentially in heating a panel by radiation and direct contact in a mould-die assembly, in compressing this panel when the foam reaches its softening point, so as to increase its density, in deforming it and rendering the material less friable, more elastic, smooth, calendered and of higher mechanical quality, while retaining its inherent qualities of non-inflammability, and finally in slightly cooling the mould after the moulding, for example by means of an air jet, so as slightly to harden the moulded product before the die is withdrawn and the said product is withdrawn from the mould.
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Hoag W. E.
Roth Freres S.A.
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