Upsetting Question

Friday night Cointalk Q&A. I have a question on the Upsetting Stage of the minting process. This photo is from the U.S. Mint video and shows one interior part of the Upsetting Mill, where the planchet travels down a path that gets narrower and narrower.



I understand the results. This causes the rim to be formed. But what's puzzling me is why the planchet doesn't get wedged in and become stuck as it glides further and further down a narrowing track. As always, thanks in advance.

 

Log in or Sign up to hide this ad.

I believe this is because the farther side of the upsetting mill is moving, pushing the planchet as it goes; while the other side is stationary. This is how the upsetting mill at the ANA museum works, which is less advanced but I assume that's how the US mint ones work. Correct me if I'm wrong.

 

I'm afraid I'm too upset now to discuss it.

 

I guess I see it simpler. If it got stuck they wouldn't use it. As the rim is formed the planchet is made narrower so it needs to grow smaller. See, simple.

 

I went to watch the video again. You're right. My eyes were so focused on the rim getting formed that I didn't notice that the circular part of the machine is rotating very quickly.

 

How does one insert images these days?

 

OMG, you're right! My question assumes the coin remains the same width - which is not the case. *Smacks forehead*

 

Clicking on "Upload a File" no longer works as it did?

 

Try downloading the image to your computer first and then uploading it to your post using the upload a file button.

 

Aha! Thanks!

 

Yes, but I had been using the "image" button. That doesn't work for me now it seems.

 

It's not just you, it's a known issue. Peter's aware of it, but I'm guessing the fix is turning out to be complicated.

 

Does this have something to do with why some emojis and pictures are being replaced by some tiny default icon with letters after them ?

 

Yep. Same issue.

 

I'm laughing with you but I'm sure laughing.

 

You are right. It rolls the blank through the upsetting machine.

 

Sheer brute force. As the steel central wheel spins and rolls the coinage material blank along the steel outer "shoe," the steel wins out over the coinage material, just as the steel dies will reshape the planchet later.

 

Thanks for the education guys. Be safe

 

What does ears of coins have to do with numismatics? I must be missing something or is this some kind of crazy pun about "corn" and "coin"?

 

That was a reference to the quality of my joke.