BACK-FLOW PREVENTING MECHANISM FOR INJECTION MOLDING MACHINE

PROBLEM TO BE SOLVED: To prevent a back-flow of a melt from the sliding face between a check ring and a cylinder. SOLUTION: The check ring 20 integrally possesses: nail 22 which, is guided to melt passage 19 formed on the periphery of cylinder head 26, slides through the passage 19; cylindrical port...

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Bibliographische Detailangaben
1. Verfasser:	UEKI SHINICHI
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:	PROBLEM TO BE SOLVED: To prevent a back-flow of a melt from the sliding face between a check ring and a cylinder. SOLUTION: The check ring 20 integrally possesses: nail 22 which, is guided to melt passage 19 formed on the periphery of cylinder head 26, slides through the passage 19; cylindrical portion 20a which, by covering part of taper 17 of the cylinder head 26, forms space 21 around the taper 17 for admitting a melt, outer face 20c of which slides on inner peripheral face 1a of cylinder 1, and which expands by receiving on inner face 20d the pressure generated when melt 25 is extruded from nozzle 24 fixed on the cylinder 1; and rear edge face 20b which, by coming into contact with tip face 4a of screw 4, cuts off the communication between the screw (4) side and the cylinder head (26) side to form sealing face 23. COPYRIGHT: (C)2004,JPO