Search International and National Patent Collections

1. (WO1999011584) METHOD FOR PRODUCING COMPONENTS FROM POWDERS

Pub. No.:    WO/1999/011584    International Application No.:    PCT/EP1998/005450
Publication Date: Mar 11, 1999 International Filing Date: Aug 27, 1998
IPC: B22F 3/02
B29B 11/12
B29C 43/00
B29C 67/04
C03B 19/06
C04B 35/64
Applicants: FRAUNHOFER-GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
VELTL, Georg
Inventors: VELTL, Georg
Title: METHOD FOR PRODUCING COMPONENTS FROM POWDERS
Abstract:
The invention relates to a method for producing components from powders and which can be aptly described as hot flow compacting. Components which can be configured in an extremely complex manner are produced from powdery starting materials that are pressed. Production costs are to be kept low and cross-flowing fissures are to be avoided. To achieve this a thermoplastic binding agent or a mixture of binding agents is added to a powder in such a proportion that the dead weight of a green compact does not exceed the liquidity limit when heated during sintering. The powder mixture is incorporated into a heated tool containing the form of the component that is to be produced and the temperature is set above the softening point of the binding agent. The powder mixture is pressed on at least one side by means of a die and is also incorporated into areas perpendicular to direction of pressing by means of a viscous flow. The green compact thus obtained is subsequently sintered.