Method for the continuous fabrication of cellular products of thermohardenable resin
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United States of America Patent
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-
Jun 1, 1982
Issued Date -
N/A
app pub date -
Mar 13, 1980
filing date -
May 12, 1976
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for the continuous fabrication of blankets or sheets of expanded phenolic resin displaying a hard skin on each of their sides, according to which a mixture, comprising in particular a resole resin, a blowing agent and a hardening catalyst is placed on an essentially flat surface of a moving element, is brought to foam and is conformed between two parallel surfaces entrained in the same direction, the lower surface being situated in the same plane as the surface of the moving component, characterized in that, in a first stage, the mixture is brought into free air towards the conformation surfaces by being submitted to a heating so as to have it expand and then the expanded mass is conformed by exerting a pressure on its free side, at the moment of entry between the conformation surfaces, and the hardening of the resin is completed while maintaining the pressure and the heating.
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