MAGPUL's new knives.

[The True North]

I'm not sure investment casting and MIM are even close to the same thing.

It's very different.


The main differences though, is the materials to which they can be applied. The investment casting process allows for a variety of materials.


MIM can only be performed with alloys with a fairly high melting temperature.

 

[Maximumbob54]

I thought investment casting was about pouring metal into the molds and because the alloy was a known variable that when cooled was within a specific tolerance allowing minimal machining.

 

[Mk-211]

I’m not sure that this analogy works. You compared 2 wildly different items, both of which are still commonly used to an incremental and currently failure prone change in the mass production of a single type of item.



I do have a question for experts on mim. How does it differ from Bill Rugers molding of revolver frames and golf club heads?

That was lost wax casting, not MIM

I’m not sure that this analogy works. You compared 2 wildly different items, both of which are still commonly used to an incremental and currently failure prone change in the mass production of a single type of item.



I do have a question for experts on mim. How does it differ from Bill Rugers molding of revolver frames and golf club heads?

Ruger uses lost wax casting to make parts, totally different from MIM.

 

[The True North]

That was lost wax casting, not MIM


Ruger uses lost wax casting to make parts, totally different from MIM.

Utter nonsense.

Ruger has been an industry leader in MIM for years.

 

[Chefget]

 

[DocJD]

When Cold Steel was trying to prove the value of the Tri-ad Lock , they built it into a huge folding "sword " .


Magpul's current MIM knife is not very much of a challenging test , even if it works , IMO .

 

[The True North]

What does that video have to do with MIM?

 

[The True North]

When Cold Steel was trying to prove the value of the Tri-ad Lock , they built it into a huge folding "sword " .


Magpul's current MIM knife is not very much of a challenging test , even if it works , IMO .

Not sure what you're trying to say here Doc.

 

[Chefget]

What does that video have to do with MIM?

Nothing

It shows their investment casting process

 

[The True North]

Nothing

It shows their investment casting process

Ok, guess I'm just confused what that has to do with this thread.

 

[Chefget]

The video was in response to your comment:

Utter nonsense.

Ruger has been an industry leader in MIM for years.

Investment casting is first cousin to lost wax casting.

It is not MIM

 

[Maximumbob54]

I'm guessing it's because investment casting is (and this is super simplified) still pouring molten metal into a mold. MIM is powdered metal and resin injected into a mold, but then you have to bake the resin from the metal allowing the metal to fuse together eliminating voids.

I guess there's nothing saying you couldn't figure out a way to investment cast blades where the end result would require minimal milling.

 

[The True North]

It is not MIM

That's exactly my point. This thread is about MIM.

 

[Mk-211]

My point was, Ruger was casting these products, not using MIM technology.

Ruger uses lost wax technology and MIM for internal parts.

 

[Blues]

We've gone in circles enough here. Please open a thread upon receiving and testing the knives if you care to do so. I'm sure we'll all be looking forward to it.