Patents Assigned to Mannesmann Aktiengesllschaft
  • Patent number: 5024811
    Abstract: Precision compacts are produced from powdered material in a mold having at least one top plug and at least one bottom plug between which plugs the powdered material is compressed. The course of the pressing force of at least one of the plugs is detected as a function of the path of its travel during compression, and compared with a predetermined path-dependent tolerance range of the pressing force. Upon exceeding such tolerance range, the final pressing position of the plug in question is changed in such a manner that the height of the compact in such final pressing position is reduced by an amount corresponding to the increased springing back of the compact upon its removal from the mold that results from the greater final pressing force.
    Type: Grant
    Filed: June 15, 1990
    Date of Patent: June 18, 1991
    Assignee: Mannesmann Aktiengesllschaft
    Inventors: Gerd Hinzmann, Norbert Nies, Siegfried Radewahn