Process for producing metallic shaped parts by powder injection molding

• US 5,737,683 A
• Filed: 09/13/1995
• Issued: 04/07/1998
• Est. Priority Date: 09/15/1994
• Status: Expired due to Term

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: BASF AG (BASF SE)
• Inventors: Sterzel, Hans-Josef
• Primary Examiner(s): Jenkins, Daniel J.
• Application Number:
  US08/527,682
• Time in Patent Office: 937 Days
• Field of Search: 419/38, 419/36
• US Class Current: 419/36
• CPC Class Codes: B22F 2003/1042 with support for articles to be sintered
• CPC Class Codes: B22F 2998/00 Supplementary information concerning processes or compositions relating to powder metallurgy
• CPC Class Codes: B22F 3/10 Sintering only
• CPC Class Codes: B22F 3/1283 Container formed as an undeformable model eliminated after consolidation
• CPC Class Codes: B22F 3/22 for producing castings from a slip
• CPC Class Codes: B22F 3/225 by injection molding

Abstract

In a process for producing a metallic shaped part by processing an injection-molding composition, where

a. the injection-molding composition is processed to give the shaped part and

b. a part of the binder present in the shaped part is removed at from 90° to 600° C. and

c. the shaped part thus obtained is sintered,

the shaped part is sintered on a support which has approximately the contour of the finished shaped part, with the contour of the support being essentially maintained during the sintering process.

Claims

1. A process for producing a metallic shaped article by injection molding in the following sequence,

a) an injection molding composition is injected into a mold to give a shaped article,

b) the shaped part is removed from the mold, and

c) the shaped article thus obtained is sintered,

wherein the sintering is on a non-flat support which has approximately the contour of the finished shaped article,

the contour of the non-flat support being maintained stable during sintering except for insignificant creep.

2. A process as claimed in claim 1, wherein the support is built up of ceramic materials.

3. A process as claimed in claim 1, wherein the support is produced by injection molding.

4. A process as claimed in claim 2, wherein the support is produced by injection molding.