METHOD AND HYDRAULIC PRESS FOR PRESSING PLASTIC AND VISCOELASTIC MATERIALS IN MOULD OF HYDRAULIC PRESS Russian patent published in 1995 - IPC

FIELD: hydraulic presses. SUBSTANCE: material to be moulded, is sealed under simultaneous effect of vibration. After that, vibration is used cyclically and the material is sealed periodically. Then the material has to be deformed and held under pressure. Time of application of vibration at cyclical action is chosen depending on type of moulded material. Hydraulic press for moulding has bed, into which the matrices are disposed, movable plate with electromagnet vibrator, onto armature of which the punch is placed. Hydraulic press has systems for controlling operation of press. The systems have hydraulic system and electric circuits. EFFECT: improved reliability of operation. 2 cl, 5 cl, 4 dwg