Double nozzle block

Details Double nozzle block Double nozzle block

1980-05-21

1981-09-29

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Temperature control

425548, 425549, 425570, 425572, B29F 103, B29F 108

Patent

active

042920183

ABSTRACT:
A double nozzle injector system includes a manifold block with an internal conical sealing surface which receives an external conical sealing surface of a spindle coupling connected to an extruder for receiving molten plastic into an axial passageway terminating at a main outflow passageway extending transversely through the coupling. An annular flushing groove encircles the coupling with a plurality of angularly spaced radial flush passageways of small diameter extending between the annular flush groove and the interior of the coupling at the main outflow passageway. Runners in the manifold block are provided with plugs having spherical surfaces for directing flow to a pair of nozzle members attached to the manifold block. Upper and lower portions of the manifold block are controlled by separate heaters and thermostats.

REFERENCES:
patent: 2896258 (1959-07-01), Moslo
patent: 3568256 (1971-03-01), Johnson
patent: 3923209 (1975-12-01), Roy

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