Apparatus for the continuous manufacture of phenolic resin foam

Details Apparatus for the continuous manufacture of phenolic resin foam Apparatus for the continuous manufacture of phenolic resin foam

1974-10-09

1977-08-16

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

With interposed non-adhering web or sheet type parting means

425149, 425224, 425329, 425817C, B29D 2704

Patent

active

040423140

ABSTRACT:
An apparatus for the continuous manufacture of phenolic resin foam in an endless sheet which includes mixing means for expandable liquid phenolic resin with a blowing agent and an acid-containing curing agent, optionally with the addition of additives, and means for processing the mixture in a temperature-controllable double belt press. The apparatus also comprises a device for cooling the phenolic resin to a temperature of from about 8.degree. to about 15.degree. C., a mixing section for admixing a blowing agent under a high pressure with said resin to form a resin premix, for mixing said resin premix with a curing agent resin to form a resin premix, and mixing said resin premix with a curing agent and other foam additives to form a curable reaction mixture, an applicator device for continuously applying said mixture uniformily onto a moving substrate, a unit for covering the mixture on said substrate with a continuous protective layer, a conveyor belt for passing the covered mixture into the double belt press, means for heating the belt press to promote foaming of the mixture under pressure until a desired sheet thickness has been obtained and a device for measuring the foam pressure within said belt press so that the foaming pressure and also the sheet thickness can be regulated.

REFERENCES:
patent: 3039887 (1962-06-01), Schneider et al.
patent: 3144376 (1964-08-01), Plumberg et al.
patent: 3152361 (1964-10-01), Edwards
patent: 3178768 (1965-04-01), Edberg
patent: 3566448 (1971-03-01), Ernst
patent: 3627275 (1971-12-01), Gusmer
patent: 3706516 (1972-12-01), Kisteneich et al.
patent: 3734668 (1973-05-01), Porter
patent: 3773876 (1973-11-01), Rath et al.
patent: 3812227 (1974-05-01), Blackwell et al.

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