Process for providing mixed foamable reactants to a mold

Details Process for providing mixed foamable reactants to a mold Process for providing mixed foamable reactants to a mold

1976-11-18

1978-12-12

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264328, 264DIG83, B29D 2700

Patent

active

041296362

ABSTRACT:
A process is provided for introducing mixed foamable reactants to a mold. The process involves introducing the reactants into a mixing chamber through injection apertures in its side wall portion. The mixing chamber has an outlet aperture communicating with the cavity of the mold. Prior to introducing the reactants into the mixing chamber, a displacement piston having a smaller cross-section than the mixing chamber is inserted into the outlet aperture of the mixing chamber so that the injection apertures communicate with the mold cavity by means of a generally annular passage.

REFERENCES:
patent: 2398318 (1946-04-01), MacMillin
patent: 2448676 (1948-09-01), MacMillin
patent: 3712777 (1973-01-01), Sherer
patent: 3793415 (1974-02-01), Smith
patent: 3984510 (1976-10-01), Chandra et al.

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