Feedhead device for the moulding of plastics materials to be for

Details Feedhead device for the moulding of plastics materials to be for Feedhead device for the moulding of plastics materials to be for

1974-08-08

1976-12-07

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Dough divider type including trap chamber

Rotating trap chamber pickup

425817R, 425DIG229, B29F 106

Patent

active

039959813

ABSTRACT:
The invention relates to a feedhead device for the moulding of plastics materials, especially foamable plastics, to be formed from a plurality of liquid constituents, the device having a mixing chamber charged with the pressurized constituents and a sprue runner adjoining the mixing chamber and leading to a mould cavity. The sprue runner flares toward the mould cavity. To create a uniform distribution of velocity over the cross-section of the sprue runner despite the widening thereof and to prevent the occurrence of evaporation prior to the plastics constituents inter-reacting, the invention proposes the forming of at least one restriction in the sprue runner.

REFERENCES:
patent: 2696640 (1954-12-01), Weinand
patent: 2770011 (1956-11-01), Kelly
patent: 3051453 (1962-08-01), Sluijters
patent: 3339240 (1967-09-01), Corbett
patent: 3394924 (1968-07-01), Harder
patent: 3577308 (1971-05-01), Van Drunen et al.
patent: 3669600 (1972-06-01), McLean, Jr.
patent: 3723037 (1973-03-01), Formo

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