Accumulator head

Details Accumulator head Accumulator head

1984-08-06

1985-10-22

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

425130, 425523, B29D 2304

Patent

active

045485690

ABSTRACT:
An injection molding apparatus includes a plasticizer (A) for plasticizing plastic pellets. An accumulator head (B) includes a plasticized material receiving entrance (40) for receiving the plasticized material. A mandrel (14) is disposed centrally within the outer body such that an annular cavity (12) is defined therebetween. A ram assembly (16) is mounted in the annular cavity for longitudinally reciprocating motion therein. Reciprocation of the ram assembly urges accumulated plasticized material through a downstream die (C). The ram assembly includes an outer ram member (30), an intermediate ram member (34), and an inner ram member (36). The ram members define a first passage array (60) between the intermediate and outer ram members and a second passage array (70) between the inner and intermediate ram members. The first and second passage arrays are operatively connected with the outer body plasticized material entrance to receive plasticized material therefrom and are operatively connected with the outer body cavity to discharge concentric annular flows of plasticized material thereto.

REFERENCES:
patent: 3801254 (1974-04-01), Godtner
patent: 4047868 (1977-09-01), Kudo et al.
patent: 4120633 (1978-10-01), Feuerherm
patent: 4152104 (1979-05-01), Przytrilla et al.
patent: 4302170 (1981-11-01), Goron
patent: 4362496 (1982-12-01), Uhlig
patent: 4382766 (1983-05-01), Feuerherm
patent: 4422838 (1983-12-01), Iwawaki et al.

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