Injection nozzle with cushion ring

Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool

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Details

26432815, 425564, 425566, B29C 4520

Patent

active

06050806&

ABSTRACT:
An injection nozzle with a cushion ring is disclosed. In the injection nozzle used for injecting pressurized and melted resin into the cavity of a mold during an injection molding process, an axial hole is formed at the lower end of a nozzle body with an annular step being formed at the upper end of the axial hole. A nozzle tip is axially received in the axial hole and is stepped at its external surface, thus forming a stop shoulder at the external surface. The nozzle tip is brought into contact with the core of the cavity at its lower end during an injection molding process. A cushion ring, made of a stainless steel and having an O-ring shape, is interposed between the annular step of the axial hole and the top end of the nozzle tip. The stop shoulder of the nozzle tip is stopped by a stop ring, thus retaining the nozzle tip in the axial hole of the nozzle body.

REFERENCES:
patent: 4010903 (1977-03-01), Sakuri et al.
patent: 5554395 (1996-09-01), Hume et al.

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