Device for producing pressed articles

US5906837A · kind A · utility

Assignee

• Mannesmann Aktiengesellschaft · DE

Inventors

• Rainer Link · Heidelberg, DE
• Klaus Vossen · Meerbusch, DE
• Matthias Holthausen · Wassenberg, DE
• Norbert Nies · Neuss, DE

Key dates

• Filing date: Jan 29, 1997
• Grant date: May 25, 1999
• Expiry date: Jan 29, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/00
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A device for producing pressed articles with a main cylindrically-shaped elements and secondary helically-shaped element from powdered material, especially powdered metal, with a female mold and with at least one top punch, which is supported so as to be rotatable about its longitudinal axis, and at least one bottom punch, which is supported so as to be rotatable about its longitudinal axis. The top and bottom punches are movable axially relative to the female mold by means of motor drives and the top punch, of which there is at least one, is driven in rotation about its longitudinal axis to achieve a helical movement in addition to its axial drive the bottom punch, of which there is at least one, is also driven in rotation. Rotary motor drives of the punches are mechanically uncoupled from the drives for the axial movement of the punches and may be regulated separately by an electronic control.