Hydraulic press for compressing metallic powder

Details Hydraulic press for compressing metallic powder Hydraulic press for compressing metallic powder

2006-04-25

2006-04-25

Smith, Duane (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Means for molding powdered metal

C425S149000, C425S150000, C425S355000, C425SDIG058

Reexamination Certificate

active

07033155

ABSTRACT:
A hydraulic press for compressing metallic powder or the like to form compacts, comprising a die-plate, an upper ram, and at least one lower ram which interact with a die-bore and are operable each by a dual-action hydraulic press cylinder, whereby a limited dead path length is provided for the return stroke in the force path between the press cylinder and the upper ram in which the upper ram is not carried along, and that a separate pressure generator producing a variable pressure is arranged in parallel with the force path via which a compression force is produced on the upper ram during the dead path length.

REFERENCES:
patent: 3890413 (1975-06-01), Peterson
patent: 4260346 (1981-04-01), Anderson, Jr. et al.
patent: 4946634 (1990-08-01), Shaner
patent: 5043111 (1991-08-01), Hinzmann et al.
patent: 6432158 (2002-08-01), Harada et al.
patent: 07-266086 (1995-10-01), None

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