Device for producing hollow shaped plastic articles

Details Device for producing hollow shaped plastic articles Device for producing hollow shaped plastic articles

1990-01-30

1993-11-30

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

264572, B29C 4516

Patent

active

052660206

ABSTRACT:
A device for producing hollow plastic articles by injection molding, the device having a nozzle (10) with a first inlet opening for melted plastic from the injection molding machine and a second inlet opening for a gas, the nozzle including a pipe for directing gas into the melted plastic and an outlet opening for the gas and for the melted plastic, the outlet opening, via a gate, being connectable with a mold cavity. The second inlet opening communicates via a conduit (28) with a gas accumulator (29) having a constant volume and in which the gas is maintained at a generally constant pressure. The conduit also has associated with it a variable throttle (32) by which the gas flow through the conduit can be adjusted.

REFERENCES:
patent: 4129635 (1978-12-01), Yasuke et al.

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