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Patent
Title
Verfahren und Vorrichtung zur Homogenisierung einer Pulverschuettung bei der Herstellung von Pulverpresslingen
Other Title
Homogenizing powder charge, e.g. of ceramic or steel, in powder compression molding production, by subjecting powder-filled mold to rotary vibration
Abstract
(B3) Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Homogenisierung einer Pulverschuettung bei der Herstellung von Pulverpresslingen. Bei dem Verfahren wird ein zu verdichtendes Pulver in eine Kavitaet einer Matrize eingefuellt und die Matrize nach dem Einfuellen des Pulvers in eine rotatorische Vibration versetzt. Mit dem Verfahren und der Vorrichtung laesst sich vor allem bei rotationssymmetrischen Kavitaeten eine sehr gute Homogenisierung der Pulverschuettung erreichen.
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DE 102009005859 B3 UPAB: 20100428 NOVELTY - In a method for homogenizing a powder charge in the production of powder compression moldings, where the powder (5) to be compressed is filled in the cavity (2) of a mold (1) and the powder-filled mold is vibrated, the mold is subjected to rotary vibration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for apparatus for carrying out the process, comprising a mold with a cavity (2), a device (3) for filling the cavity with powder (5) and a device for compressing the powder in the cavity, the novel feature being that the apparatus includes a drive for subjecting the mold to rotary vibration. USE - The method and apparatus are useful in the mass production of components of complex geometry, by dry compression of powder followed by sintering. The obtained components are typically of functional ceramic, constructional ceramic, sintered steel or hard metal. ADVANTAGE - A very even, homogeneous spatial distribution of powder in the mold cavity is attained. Compression moldings obtained in the mold thus have a homogeneous density distribution, thus avoiding uneven shrinkage during subsequent sintering of the moldings and consequent distortion of the final components.
Inventor(s)
Bierwisch, C.
Moseler, M.
Kraft, T.
Riedel, H.
Patent Number
102009005859
Publication Date
2009
Language
German