Needle shut-off nozzle for plastic injection moulding compounds

Details Needle shut-off nozzle for plastic injection moulding compounds Needle shut-off nozzle for plastic injection moulding compounds

1993-07-09

1995-01-10

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means between charger and mold to cut off flow of...

425564, B29C 4523

Patent

active

053801881

ABSTRACT:
A needle shut-off nozzle for plastic injection moulding compounds with an internal chamber for a spring acting on a shut-off nozzle has a basic body. The end of the shut-off needle (11) facing the spring (7) is designed as a cylinder (12) which is closed on the end facing the tip of the needle. The cylinder (12) engages an opposing cylinder (13), designed as a hollow cylinder, in sliding fashion, producing a sealing effect.

REFERENCES:
patent: 3295169 (1967-01-01), Moslo
patent: 3933312 (1976-01-01), Fries
patent: 3954209 (1976-05-01), Ramond
patent: 4010903 (1977-03-01), Sakuri et al.
patent: 4427361 (1984-01-01), Saito
patent: 4681528 (1987-07-01), Maruyama et al.
patent: 4990083 (1991-02-01), Bernhardt
patent: 5049062 (1991-09-01), Gellert
patent: 5059113 (1991-10-01), Ito et al.

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