Needle assembly for gas-assisted injection moulding

Needle assembly for gas-assisted injection moulding

A fluid injection and exhaust needle (10,100) for use in gas injection moulding comprising a needle with two separate flow channels (102,104); a fluid inlet channel and a fluid outlet channel; wherein gas is injected into the melt via the fluid inlet channel to form a gas cavity in the melt, and gas...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: RUI MAGALHAES, GORDON FREDERICK SMITH
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
PERFORMING OPERATIONS
SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR
SHAPING OR JOINING OF PLASTICS
TRANSPORTING
WORKING OF PLASTICS
WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Beschreibung
Zusammenfassung:A fluid injection and exhaust needle (10,100) for use in gas injection moulding comprising a needle with two separate flow channels (102,104); a fluid inlet channel and a fluid outlet channel; wherein gas is injected into the melt via the fluid inlet channel to form a gas cavity in the melt, and gas is simultaneously exhausted from the cavity via the fluid outlet channel.