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Features and advantages of MIM process


 

Date:[2014/3/12]
 

Characteristics of MIM products
The 1 part geometry, a high degree of freedom, like the production of plastic products, forming a complex shape metal parts production.
2, the MIM product of uniform density, good smoothness, surface roughness can reach Ra 0.80 ~ 1.6 μ m, weight is in the range of 0.1 ~ 200g. High precision (± 0.1% and ± 0.3%), generally without the need for subsequent processing.
3, applied range is wide, wide application range, high utilization rate of raw materials, production of high degree of automation, simple process, and can realize continuous mass production.
4, the product quality is stable, reliable performance, relative density can reach 95% ~ products 99%, heat treatment, carburizing, quenching, tempering. Product strength, hardness, elongation rate, high mechanical properties, good wear resistance, fatigue resistance, microstructure
Generally recognized that the development of MIM technology will lead to a revolutionary parts forming and processing technology, known as the "forming parts of the hottest twenty-first Century".
Technical advantage
MIM and traditional powder metallurgy phase contrast
MIM can manufacture products with complicated shapes, to avoid the two machining more.
MIM products with high density, good corrosion resistance, high strength, good ductility.
MIM can turn into a MIM product of 2 or more PM product portfolio, save materials and processes.
MIM and mechanical processing of phase contrast
MIM design can save material, reduce weight.
MIM can be repeatedly broken gate material injection after use, do not affect the product performance, high material utilization rate.
MIM through a mold forming complex products, avoid multiple processing procedures.
MIM can make difficult to machining materials with complex shape parts.
MIM and precision casting phase contrast
MIM can make thin products, the thinnest can do 0.2mm.
MIM product surface roughness better.
MIM is more suitable for fine holes and hole.
MIM greatly reduces two machining work.
MIM can fast high-volume, low cost manufacturing of small parts.
Design Guide
Has the following characteristics of the products, usually suitable for MIM:
Complex shape: MIM allows like injection molding, free design of 3D shape. Because MIM is a forming process,
The shape of the product will not be additional cost increase, if weight loss through the shape design, the cost will be decreased,
This makes MIM become one of the best ways to more than one independent components combined into a multifunctional parts.
MIM design rules and injection molding is very close, it is easy to adapt to the three level of complex shape metal parts.
Precision size: MIM near net forming precision is usually the size of ± 0.5%. Some characteristics of size can reach ± 0.3%.
As with other technologies, high precision means higher cost, so can meet the use cases recommended size
Tolerance to relax. MIM cannot meet the tolerance can be achieved by subsequent processing method.
Thin-walled products: less than 6 mm wall thickness for the MIM is more suitable for the. The outer wall of thick can also,
But the process time will increase a lot, the material cost will increase. Less than 0.5 of MM thin by MIM can achieve,
Think good industry can do 0.2mm very thin-walled products (but there is a certain dependence on the specific shape of the product).
Weight and size: MIM is suitable for weighing less than 100 grams of parts, less than 50 grams is the most common application.
However, weight of 250 grams of parts can also be used MIM technology. The raw material is the key cost MIM process factors.
MIM in the early stage of product design is often as much as possible to reduce the weight of parts. Like plastic products,
Can not affect the product integrity conditions, to reduce the weight of parts through the kernel and support.
MIM outstanding performance in small and micro parts, weighing less than 0.1 grams can be.
The length of more than 250mm products can also be.
Batch size: for MIM products, mold and early stage of product development process is required for MIM process,
So for small batch products (annual demand less than thousands of parts), it will influence the decision making process.
MIM from the small yield every year tens of thousands of pieces of up to tens of millions of pieces of production can be economically achieved.
A wide range of raw materials: MIM can deal with many materials, including iron alloy, stainless steel, copper, KOVAR alloy, high-temperature alloy, hard alloy etc..
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