MIM ? Showing my ignorance

3daman!

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What does the MIM stand for? I keep seeing in some of the recent posts and just dont have a clue.
Thanks in advance,
Dave
 
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Metal injection molding; powdered metal with bonding agent and put into a mold of the part, then heated to remove most of the bonding agent, then heat-treated and finished. By report the parts work very well, but some miss the forged and fitted hammers and triggers.
 
I always remember it as "Mashed Into Metal"...

Not exactly correct, but it works.
 
Not Exactly

Traditional sintered parts are made by compressing metal powder in a mold and then heating at high temperature to sinter the powder together.

MIM feedstock is a blend of metal and polymers. This material is injection molded using plastic molding technology. Almost any details that can be molded into plastic can be molded in the MIM materials (embossed or engraved letters or checkering). The molded parts are debound to get the plastic out. Finally the parts are sintered to yield a part wish almost no porosity. The parts shrink about 30% during the sintering process.
 

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