MIM

[1026man]

Please tell me what "MIM" means.

 

[brucev]

Metal Injection Molding.

 

[thorsa]

Catamold® Feedstock for Metal Injection Molding (MIM) - YouTube

 

[chief38]

It means that the parts in the new S&W's that are MIM have been cast out of powdered granular metal similar to how plastic is manufactured.

 

[setxn]

M aybe I t's M etal ?

 

[chief38]

If you don't like powdered metal you can of course always but a vintage model pre '96.



Chief38

 

[had3nuf]

I was curious as to what MIM was myself, so I researched it on the web,getting into the older generation ( seeing as how I didn't know kow to turn a computer on until 1996 ) I understand how people tend to have reserves about new technology. Any of the older forgeing techniques has a density value of around 70%, which meens there is 30% of some other form other than your intended material, but with the MIM moulding they are getting 90% to 99% density. and the denser the material the stronger it should be.

 

[Hapworth]

I was curious as to what MIM was myself, so I researched it on the web,getting into the older generation ( seeing as how I didn't know kow to turn a computer on until 1996 ) I understand how people tend to have reserves about new technology. Any of the older forgeing techniques has a density value of around 70%, which meens there is 30% of some other form other than your intended material, but with the MIM moulding they are getting 90% to 99% density. and the denser the material the stronger it should be.

There's strength in flexibility -- and gun parts need a lot of that to absorb the repeat concussions. A harder density does not always make for a longer lasting product or better performing product.

 

[Fat Old Guy]

but with the MIM moulding they are getting 90% to 99% density. and the denser the material the stronger it should be.

Packed sand is pretty dense but not very strong. Glass is dense but not very strong.

Do they make the landing gear for F-18s out of MIM?

 

[mlapaglia]

You might find this interesting reading from S&W.

 

[Fat Old Guy]

but with the MIM moulding they are getting 90% to 99% density. and the denser the material the stronger it should be.

S&W said that the MIM parts were almost but not quite as dense as wrought parts. Density isn't measured in percentages unless you have some reference as in "this is 90% as dense as that."

 

[Titegroups]

I was curious as to what MIM was myself, so I researched it on the web,getting into the older generation ( seeing as how I didn't know kow to turn a computer on until 1996 ) I understand how people tend to have reserves about new technology. Any of the older forgeing techniques has a density value of around 70%, which meens there is 30% of some other form other than your intended material, but with the MIM moulding they are getting 90% to 99% density. and the denser the material the stronger it should be.

I don't where that 70% number came from from but it sounds way off. Forgings are very dense due from the metal being beat into shape, MIM is more like a casting but quite strong also but i don't think there's a 30% difference in density at all. I would guess the forgings were more dense. Of coarse "strength" is measured in many ways. Forgings have a grain structure and a MIM part wouldn't. Comparing apples and oranges really but I will take the forged parts over MIM.

 

[Tom C]

Packed sand is pretty dense but not very strong. Glass is dense but not very strong.

Do they make the landing gear for F-18s out of MIM?

I don't know about landing gear struts and MIM, but they make turbine disks and blades of it and they spinning pretty fast.

 

[Fat Old Guy]

I don't know about landing gear struts and MIM, but they make turbine disks and blades of it and they spinning pretty fast.

Odd, I can't find anything to support this assertion. In fact, when I googled this, what I found were people from the aerospace world denying.

 

[Tom C]

That could be because in the aviation industry they call it “sintered metal.” A friend of mine was in the first F-18 ejection in Sept, 1980. They lost the a/c because one of the engine disks, made of powdered metal, came apart and damaged the a/c sufficiently to cut flight controls. They were forced to punch out.

I believe the problem may be multiple names for similar, but slightly different processes, all using powdered metal technology.

 

[Fat Old Guy]

More reasons to never fly again. TSA and engines made of powder.

 

[Tom C]

How do you think they make those blades of such intricate shapes without something like powdered metal technology?

Who told you that you were going to live forever? There is nothing in the world like flying fighters.

 

[Fat Old Guy]

How do you think they make those blades of such intricate shapes without something like powdered metal technology?

Actually, the blades are cast, machined and welded. The disk is made of Bisquick.

Who told you that you were going to live forever?

Duncan MacLeod.

There is nothing in the world like flying fighters.

Depends on your perspective.