Metal Injection Molding (MIM) is a combination of Powder Metallurgy (PM) and Plastic Injection Molding. The technology provides alloying advantages of Powder Metallurgy along with complex shape making capabilities of Plastic Injection Molding. Metal Injection Molding is a “Green technology”.

Characteristic Minimum Maximum Optimum
Mass 0.01 g 250 g <50 g
Wall Thikness 0.125 mm 7.62 mm 2.03 mm
Dimension 0.3 mm 200 mm 50 mm
Annual Usage 25,000 Millions >100,000

*Density > 97%
Tolerance: +/- 0.5% of base dimension
Surface finish : 0.6 – 1.6 R a

TECHNOLOGY

MIM MATERIALS
MOLDING
DEBINDING
SINTERING

MOLDING

The homogeneous feedstock comprising of powders & binders is heated & injected to the desired size & shaped mould with a moulding machine. The output of this process is called green part.

DEBINDING

The polymer binders decomposes with the help of acid catalyst & comes out by making the part porous. Here the secondary binders hold the powder particles & the output of this process is called brown part.

SINTERING

In this process, the removal of secondary binders & densification happens isotropically by the application of heat in a controlled temperature & pressure atmosphere. This process gives parts its required dimension with mechanical and chemical properties.

MIM MATERIALS

Low-alloy steels Condition
FN02 Case hardening
FN0205 Hardenable
4605 Hardenable
FN08 Hardenable, Case hardening
8620 Case Hardening
8740 Hardenable
42CrMo4 Hardenable
4340 Hardenable
100Cr6 Hardenable
1010 Case Hardenable
Stainless Steel Condition
316L Non-magnetic
PANACEA Non-magnetic, Ni-free
17-4PH Hardenable
420 Hardnable
430 Ferro magnetic
440Nb Hardenable
42CrMo4 Hardenable
310 Heat resistant
Soft Magnetic
FeSi3
FN50
Special
GHS-4 Heat, Wear resistant
Ti Non - mangetic, inert
M2 Wear resistant
Inconel-713

A wide range of alloys as well as pre-alloys can be molded using this process.