About MIM

MIM is a modern technological procedure comes out of the traditional injection molding, MIM is based on a combination of two procedures, powder metallurgy and plastic injection molding, it’s a kind of multiple process.

 

MIM technology has the unique advantages for the complex and precision shaped parts, also can be integrated manufacturing of different materials, with no limitation design, widely material selection, high production capacity, lower production cost etc. which brings to the“hottest process for the metal parts” in MIM industry.

MIM process

Mixing
Kneading
Injection
Debinding
Sintering
Post-sintering operations

MIM advantage

Batch Convert

the same as plastic, can produce multiple pieces at one time, easy arranged the production to meet the demand

High stability

the density after sintering is very closed to the theoretical density, stable quality, can easily make the post-sintering operations to the parts, like CNC and heating processing

Excellent surface

the roughness of sintering parts is > 1um, also can be reached other surface request via different ways

High performance

high strength , high toughness and elongation, good abrasion resistance, resistance to fatigue, well formation

High accuracy

the tolerance accuracy of ± 0.5% can be achieved, and higher dimensional accuracy can be obtained by cooperating with other processing methods

Multiple choices

most metal materials can be used, which can meet the material selection needs of most customers to the greatest extent

Recyclable

the utilization rate of raw materials is high, close to 100%, which is a near net forming technology, which can effectively avoid the waste of materials and also respond to the call of the national resource recycling

Difference between MIM and other processes

Characteristics MIM HPM PM Die casting Investment casting CNC
Complexity High Low Low High Mid High
Min.wall thickness 0.1 mm 1mm 1mm 0.8mm 2mm 0.5 mm
Surface roughness Mid (1.2-1.6μm Ra) Mid (1.2-1.6μm Ra) Poor Mid Mid (5 μm Ra) Mid
Mechanical properties High High Mid Poor Mid High
Varieties of materials Many Average Average Lew Average Many
Density 96% 96% < 95% 99～100% 99～100% 99～100%
Accuracy Average High High Average Average High
Plating quality Good Good Low Mid Good Good
Productivity High High High High Mid Low
Cost Mid-high Mid-low Low Low Mid-low High

High technology products

Medical parts

High performance:

  • High density > 7.5g/cm3(PM:<7.2)
  • High strength, high toughness and elongation
  • High precision
  • Cost for mess production

Next

HPM technology