HYDRAULIC CIRCUIT FOR TOGGLE TYPE MOLDS CLAMPING APPARATUS

PURPOSE:To provide a hydraulic circuit which can effectively suppress push return of a piston rod of a molds clamping cylinder during a period from molds clamping completion to molds opening start without providing a hydraulic oil supply source such as ACC, etc., reduce number of components and larg...

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Bibliographische Detailangaben
1. Verfasser:	MIKI MITSUZO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING PERFORMING OPERATIONS PRESSES PRESSES IN GENERAL 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:	PURPOSE:To provide a hydraulic circuit which can effectively suppress push return of a piston rod of a molds clamping cylinder during a period from molds clamping completion to molds opening start without providing a hydraulic oil supply source such as ACC, etc., reduce number of components and largely reduce a cost. CONSTITUTION:A pressure holding circuit for applying hydraulic pressure of molds clamping direction to molds clamping cylinder during a period from molds clamping completion to mold opening start is provided between a molds switching control solenoid switching valve 10 for controlling molds switching operation and a molds clamping cylinder 2, operated as a function of molds opening brake circuit at the time of molds opening stroke, and a check valve function and a relief valve function are provided in a logic valve 11 of the circuit.