MIM vs Die casting, Choose Which?

Metal injection molding

It is usually used to make products with small sizes, large quantities, and complex structures. Most MIM parts are made of ferrous metals, such as iron, stainless steel, tungsten alloy, titanium alloy, etc.

MIM Electric Rotating Mechanism

Die casting

Die casting is a metal casting process in which molten metal is forced into a mold under high pressure. The production process in which the part is ejected from the mold after it has cooled. Most die-casting parts are made of non-ferrous metals, especially zinc, copper, aluminum, magnesium, lead, tin, and tin-based alloys.

Comparing the die-casting process with the metal injection molding process, through the comparison of the following aspects, I can better understand the differences between the metal injection molding and die casting  processes and choose a more suitable method:

1.Selection of materials

As mentioned above, casting generally uses non-ferrous metals, MIM usually uses ferrous metals

2.Product accuracy

The precision of casting is low, and CNC is usually required in the background to ensure the tolerance, while the precision of MIM process is relatively high. Unless the tolerance is very high, there is generally no need for secondary CNC machining

3.The surface finish of the product

The casting finish is low, and there are many burrs on the surface. It is necessary to increase the deburring process, and the surface must be ground or sandblasted to maintain the surface finish. The surface finish of MIM products is very high, usually Ra 0.8-1.6 um;

4.Product size

The cost advantage of MIM lies in the production of products less than 100g, and casting has more advantages in products larger than 100g;

5.Molds life

Usually, the mold life of MIM is 200000-300000 times, and the service life of casting mold is about 100000 times.

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Tags   Metal Injection Molding  |  MIM Materials  | Design

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