Apparatus for producing molded foam articles without defects

Details Apparatus for producing molded foam articles without defects Apparatus for producing molded foam articles without defects

1975-03-14

1976-09-28

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Female mold, pallet handling means and means to charge...

425444, 425817R, 264DIG83, B29D 2700

Patent

active

039828700

ABSTRACT:
Apparatus to practice the method of forming foam molded articles without the defects caused by incompletely mixed reactants in the mold cavity is provided. A mixing chamber bounded by a sidewall portion having injection apertures, an outlet aperture which communicates with the mold cavity and a first ejector piston displaceable within the bore of the mixing chamber is provided. Opposite said outlet aperture is a second ejector piston which is retracted at the start of the mold filling operation to provide a receiving chamber in the mold wall. As the mold filling proceeds, this piston is displaced towards the mold cavity until its end surface forms a planar surface with the mold wall. Optionally, this piston may be displaced into the mold cavity to eject the molded article.

REFERENCES:
patent: 3174187 (1965-03-01), Schriever
patent: 3706515 (1972-12-01), Keuerleber et al.
patent: 3793415 (1974-02-01), Smith
patent: 3811813 (1974-05-01), Taccone

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