Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1979-08-31
1981-06-30
Anderson, Philip
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
264 51, 264DIG9, 4254031, 425442, 425444, 425812, B29D 2700
Patent
active
042760089
ABSTRACT:
Expandable thermoplastic polymer beads are introduced into a tank and are agitated therein in a heated moisture-free condition. The beads are pressurized within the tank with a hot gaseous medium to soften them and are then subjected within the tank to a selected degree of vacuum to expand the beads or particles. The vacuum is removed and atmospheric pressure is re-established in the tank. The expanded hot moisture-free particles are introduced into a mold where they are fused into an integral mass, followed by cooling of the fused mass within the mold to form an outer skin on the mass. The fused mass is ejected from the mold.
REFERENCES:
patent: 2707802 (1955-05-01), Gard
patent: 2752635 (1956-07-01), Miller
patent: 3086248 (1963-04-01), Culp
patent: 3158903 (1964-12-01), Fischer et al.
patent: 3160919 (1964-12-01), Carter
patent: 3214794 (1965-11-01), Otis
patent: 3235908 (1966-02-01), Thompson
patent: 3247545 (1966-04-01), Sullivan
patent: 3419648 (1968-12-01), Leach
patent: 3452124 (1969-06-01), Knapp
patent: 3577360 (1971-05-01), Immel
patent: 3587134 (1971-06-01), Premo
patent: 3733159 (1973-05-01), Coffman
patent: 3752437 (1973-08-01), Saidla
patent: 3756756 (1973-09-01), Wilson et al.
patent: 3765814 (1973-10-01), Yaita
patent: 3837769 (1974-09-01), Erlenbach
patent: 3986811 (1976-10-01), Gunnels
patent: 4032609 (1977-06-01), Smith
patent: 4106884 (1978-08-01), Jegelka
Montgomery Robert L.
Smith Stuart B.
Anderson Philip
Southeastern Foam Products, Inc.
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