STRUCTURE FOR PREVENTING RESIN INTRUSION INTO HEATER, INJECTION DEVICE, AND INJECTION MOLDING MACHINE

To provide a structure for preventing resin intrusion into a heater in a shut-off nozzle.SOLUTION: A shut-off nozzle (5) includes: a nozzle body (25) having an injection flow path (33); and a shut-off valve (26) configured to open and block the injection flow path (33). The nozzle body (25) has a sl...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEYA MASAHIKO, SHIMOAKA YOSUKE, NAKAYAMA SEIKI
Format:	Patent
Sprache:	eng ; jpn
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:	To provide a structure for preventing resin intrusion into a heater in a shut-off nozzle.SOLUTION: A shut-off nozzle (5) includes: a nozzle body (25) having an injection flow path (33); and a shut-off valve (26) configured to open and block the injection flow path (33). The nozzle body (25) has a sliding portion for driving the shut-off valve, and a sliding exposed portion (39) is formed therein. A structure (6) for prevention of resin intrusion into heaters is provided in the vicinity of the sliding exposed portion (39), and is configured to prevent the resin leaking from the sliding exposed portion (39) from intruding into a heater (38) provided in the shut-off nozzle (5).SELECTED DRAWING: Figure 3 【課題】シャットオフノズルにおいてヒータへの樹脂の侵入を阻害する構造を提供する。【解決手段】シャットオフノズル（５）は、射出流路（３３）が形成されているノズル本体（２５）と、射出流路（３３）を開閉するシャットオフ弁（２６）とを備えている。ノズル本体（２５）には、シャットオフ弁を駆動する摺動箇所があり摺動露出部（３９）が形成されている。ヒータへの樹脂侵入阻害構造（６）を摺動露出部（３９）の近傍に設け、摺動露出部（３９）から漏れる樹脂がシャットオフノズル（５）に設けられているヒータ（３８）へ侵入するのを阻害するとして構成する。【選択図】図３