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MIM manufacturing process

Step 1: Blending metal powder with binder
Powder:
Metal powder that is finer than 20μm is required. Either alloy powder or pre-mixed powder may be used. Using powder finer than 20μm ensures better density for sintered parts. Relative density over 95% is usually expected.

Binder:
Plastic material is used as binder for improvement or feedstock’s liquidity to facilitate injection.

Step 2: Blend and heat materials evenly
Kneading:
Blend metal powder with binder and knead while heating them to form the feedstock with metal powder evenly blended on binder base.

Step 3: Inject mold the feedstock into green parts
Injection:
Heat the feedstock to fluid which is injected into the mold to form green parts. This step is repeated several times.

Step 4: Sinter green parts in a vacuum and high heat
Vacuum sintering:
In vacuum state, heat green parts to 1100°C - 1400°C to remove binder and to compact parts. Reducing atmosphere may be used instead, although with possibly of producing inferior part density and mechanical properties.

Step 5: Post-process the sintered parts into finished parts

MIM Injection Machine
MIM Vacuum Sintering
MIM Production Equipment
Equipment Quantity
Injection Molding Machine 20 sets
Kneading & Pilletzing 3 sets
Sintering Furance 5 sets
Debinding Machine (Solvent) 2 sets
Anneal Oven 2 sets 
Magnetic Abrasive Machine 3 sets
Tumbling Machine 3 sets 
MIM Inspection Equipment
Equipment Quantity
2.5D Dimensional Measuring Computer System ( with Profile Projector) 1set

2D Dimension Measuring 1 set 

Hardness Tester 1 set 

Density Tester 1 set
Surface Roughness Instrument 1 set
Heigh Gauge 1 set
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