 |
Visits: 86017959
AMS now reading: 1
|
|
|
|
|
 |
|
|
| Bidulský R., Actis-Grande M. |
| THE CHOICE OF METAL POWDER FOR MIM |
Abstract
Metal injection moulding (MIM) is a manufacturing process for the large-scale net shape forming of various metal parts. It combines the geometrical complexity possible from injection moulded plastic with the mechanical properties of high performance metallic alloys. MIM embraces the best practices of injection moulding and powder metallurgy, and because machining operations are reduced, there are real associated economic advantages. The main applications of injected metallic products are related with the dentistry, electronic equipment, laboratory instruments, printed circuits, machinery tools and others. MIM is a process where fine powders of metal are mixed with binder and molded by injection to obtain the piece in the green state. The binder is then extracted and the metallic specimen is sintered. Specimen produced by this way presents larger density, higher mechanical properties and better superficial finishing than specimen produced by traditional powder metallurgy methods. The advantages of injection molding process are related to near net shaping pieces that give a minimum cost of machinery, high productivity that facilitates a fast molding cycle and mass production, the capability of products with complex shape, the high dimensional precision and the quality of the surface finishing and automation. The main categories of MIM powder fabrication techniques are mechanical fabrication, chemical fabrication, and atomization. There is considerable variety in the characteristics of the powder which are determined by those fabrication techniques. The good amount of solids depends on the powder characteristics like particle size distribution, particle shapes and inter-particles friction.
|
| Keywords: powder metallurgy|metal injection moulding|metallic powder| |
| No 3 (2006), p. 309-313 |
|
|
|
|
|
|
|
Editors and press
AMS online
