About HPM

HPM is refer to high precision press molding with high technology both in material and process, the density and strength are higher than traditional press molding – PM, HPM is a method of making various different parts and products by pressing and sintering with the mixed powder with metal and non-metal.

Dorst molding press machine

The cutting-adage German equipment, combine with high precision process in CPT, can meet the high- quality request to the HPM parts.

HPM process

Mixing
Kneading
Injection
Debinding
Sintering
Post-sintering operations

HPM advantage

Batch convert

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

no gate mark, no joint line, no dent, the roughness of sintering parts can be Ra1.2 – 1.6 um, 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 ± 0.3% can be achieved, and higher dimensional accuracy can be obtained by cooperating with other processing methods

Multiple choices

most metal materials (including cemented carbide and heat-resistant materials) can be used to meet the material selection needs of most customers to the greatest extent.

Short delivery time

can submit samples quickly, and submit samples to customers in 2-3 weeks at the earliest

Low cost

compared with MIM's high mold cost, HPM only needs 30 ~ 40% of its cost

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

Gear

High performance:

  • High density > 7.5g/cm3(PM:<7.2)
  • High strength, high toughness and elongation
  • Low mold cost: 20%-30% cheaper than MIM
  • Fast sample available: 2-3 weeks
  • Shrinkage: 5-7%
  • Good dimension control: +-0.3%
  • No gate mark, no joint line, no dent
  • New material: 17-4PH,4605 modified
    (Fe-Cr-Ni-Mo）

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