The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 12, 2006
Filed:
Aug. 22, 2002
Jurgen Hinzpeter, Schwarzenbek, DE;
Ulrich Zeuschner, Schwarzenbek, DE;
Ingo Schmidt, Schwarzenbek, DE;
Thomas Pannewitz, Schwarzenbek, DE;
Udo Baltruschat, Hamburg, DE;
Thorsten Ehrich, Hamburg, DE;
Ulf Hauschild, Schwarzenbek, DE;
Jurgen Hinzpeter, Schwarzenbek, DE;
Ulrich Zeuschner, Schwarzenbek, DE;
Ingo Schmidt, Schwarzenbek, DE;
Thomas Pannewitz, Schwarzenbek, DE;
Udo Baltruschat, Hamburg, DE;
Thorsten Ehrich, Hamburg, DE;
Ulf Hauschild, Schwarzenbek, DE;
Fette GmbH, Schwarzenbek, DE;
Abstract
A method for minimizing the spread of the maximum compression forces in compacting powder, specifically metallic powder, by means of a powder press which has a die-plate, an upper ram, and at least one lower ram which are associated with a die-bore and are respectively operable by a hydraulic press cylinder, and a charging shoe movable on the die-plate along a predetermined path for filling the die-bore with the powder, wherein the maximum compression force of at least the upper ram is measured upon arrival at a predetermined position, the charging shoe, the die-plate, the upper ram and/or lower ram are vibrated at a predetermined frequency and amplitude during the filling operation and/or at the beginning of the compression procedure and, in addition, the filling time or the course of charging shoe motion in time are predetermined, wherein the frequency distribution of the maximum compression force values is determined at intervals and the standard deviation is determined therefrom for the maximum compression force, the standard deviation is compared to a predetermined value, if desired, and the vibration parameters, the course of motion in time and/or the path of charging shoe travel are varied according to a predetermined program until the standard deviation has reached the predetermined value or a minimum.