INJECTION MOLDING MACHINE

To provide an injection molding machine capable of effectively suppressing defects in surface properties of molded products.SOLUTION: An injection molding machine 1 has an air pressure adjusting unit 53 that is connected to a cavity C and sucks gas from the cavity C or sends gas into the cavity C to...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAMOTO SHIRO, NISHIUCHI KENJI
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 an injection molding machine capable of effectively suppressing defects in surface properties of molded products.SOLUTION: An injection molding machine 1 has an air pressure adjusting unit 53 that is connected to a cavity C and sucks gas from the cavity C or sends gas into the cavity C to adjust an air pressure in the cavity C. The air pressure adjusting unit 53 includes a cylinder unit 54 connected to the cavity C, a piston unit 55 accommodated in the cylinder unit 54 so that the piston unit 55 can reciprocate, and a piston drive unit 56 that reciprocates the piston unit 55. Then, a control unit 80 controls the piston drive unit 56 so as to adjust the air pressure P in the cavity C during an injection operation of injecting a resin material J into the cavity C.SELECTED DRAWING: Figure 7 【課題】成形品の表面性状の不良を効果的に抑制できる射出成形機を提供する。【解決手段】射出成形機１は、キャビティＣに接続され、キャビティＣ内から気体を吸い出しまたはキャビティＣ内に気体を送り込んでキャビティＣ内の気圧を調整する気圧調整部５３を有する。気圧調整部５３は、キャビティＣに接続されたシリンダ部５４と、シリンダ部５４に往復移動可能に収容されたピストン部５５と、ピストン部５５を往復移動させるピストン駆動部５６と、を有している、そして、制御部８０が、キャビティＣに樹脂材料Ｊを射出する射出動作中にキャビティＣ内の気圧Ｐを調整するようピストン駆動部５６を制御する。【選択図】図７