Controller for a hydraulic press and method for the...

Details Controller for a hydraulic press and method for the... Controller for a hydraulic press and method for the...

2005-12-13

2005-12-13

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

C060S414000

Reexamination Certificate

active

06973780

ABSTRACT:
The invention relates to a controller for a hydraulic press, comprising a pressing cylinder (1), a reservoir (2), a valve group (3), a pressure medium reservoir (7) and a hydraulic pump (6), connected together by means of a cylinder line (4), a reservoir line (5) and a tank line (8). According to the invention, a pressure converter (9) is arranged on the valve group (3), which may operate as a pressure amplifier or pressure reducer. The particular mode of action of said controller is achieved whereby the valve group (3) comprises a pre-press valve (11), a low-pressure chamber outlet valve (12), a low-pressure chamber inlet valve (13), a main press valve (14), a closing valve (15), a pressure release valve (16) and a 3-way valve (17), which may be operated by a particular control sequence. Said invention is applicable in hydraulic presses and of particular advantage in presses for the forming of ceramic pieces such as tiles.

REFERENCES:
patent: 5568766 (1996-10-01), Otremba et al.
patent: 5852933 (1998-12-01), Schmidt
patent: 6370873 (2002-04-01), Schaich et al.
patent: 4308344 (1994-09-01), None
patent: 4320213 (1994-12-01), None
patent: 4436666 (1996-04-01), None
patent: 63256300 (1988-10-01), None

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