INJECTION MOLDING MACHINE

PROBLEM TO BE SOLVED: To provide an injection molding machine that can suppress the variation of the amount of molding material filled into a plurality of cavities.SOLUTION: Check valves 170 allowing the flow of a molding material from a branch portion 141 side to a cavity 321 side and preventing th...

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Bibliographische Detailangaben
Hauptverfasser:	YANAGIDA YUKIHIRO, SUDO KIYOSHI, HIKICHI TAKEO
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an injection molding machine that can suppress the variation of the amount of molding material filled into a plurality of cavities.SOLUTION: Check valves 170 allowing the flow of a molding material from a branch portion 141 side to a cavity 321 side and preventing the flow of the molding material from the cavity 321 side to the branch portion 141 side are disposed in passages each extending from a branch portion 141 to each cavity 321, and each of the check valves 170 is provided with an escape passage allowing the escape of a part of the molding material to the branch portion 141 side when the pressure due to the molding material from the cavity 321 side to the branch portion 141 side. 【課題】複数のキャビティに充填させる成形材料の量のばらつきを抑制可能とする射出成形機を提供する。【解決手段】分岐部１４１と各キャビティ３２１に至る各流路内に、分岐部１４１側からキャビティ３２１側への成形材料の流れを許容し、キャビティ３２１側から分岐部１４１側への成形材料の流れを阻止するチェックバルブ１７０をそれぞれ配置させると共に、チェックバルブ１７０には、キャビティ３２１側から分岐部１４１側への成形材料による圧力が高くなると、成形材料の一部を分岐部１４１側に逃がすことを可能とする逃がし通路が設けられていることを特徴とする。【選択図】図１