Patent ID: 6305925
Filing Date: 2001-10-23
Classification: B28B,B30B

Abstract:
An apparatus for dry forming powders, which comprises:a punch;a movable cross-member of a press, wherein the movable cross-member supports the punch;a mold opposing said punch, wherein the mold is provided with a forming cavity;an elastic membrane having a forward and a rear, the elastic membrane being sealed about a perimeter of the punch, wherein the rear of the elastic membrane faces said forming cavity;a feeder for feeding a hydraulic liquid between the membrane and the punch lower surface when the punch interacts with the forming cavity to compress the powder contained within the forming cavity, said feeder comprising a hydraulic liquid source connected to the rear of the membrane via a distributor valve arranged to connect said rear alternately to the source and to discharge, and a pressure pulse generator positioned between said distributor valve and said membrane rear.