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05' D Oregon quarter shattered die???
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<p>[QUOTE="playpossum0985, post: 1809349, member: 23806"]The planchet is soft and will give, absorbing a great deal of pressure, but only to a point. Imagine blowing up a balloon in a glass jar, same basic concept, eventually it will run out of places to go. I know the mint presses slam down on the coins at very fast rate and super high pressure, I believe it is around 20 tons? Try slamming two hammers together face to face, somewhere amongst the shattered chunks you will see something called pressure flaking. The edges of some of the pieces will be sharper than surgeons scalple's. That is how thin hardened steel can shatter too, a few microns. Now if you were to try and contain all that pressure from going outward, and it had no where else to go, it will find it's own week points and damage will be more severe and localized to the faces of the hammers. It would also be feesable for the pieces to remain attached to each other due to surface tension between the erraticly formed pieces (a mechanical bond rather than a molecular). Plus the heat created with these extreme pressures could also give the fragments some bite to each other from the metal expanding naturally. </p><p><br /></p><p>If a planchet error why then no damage to the devices?</p><p>Same question for a strike through?</p><p><br /></p><p>I dont believe the planchet itself would crack unless it was broadstruck, or out of collar, that would be more of a stress tear than a crack. Please correct me if I am wrong.[/QUOTE]</p><p><br /></p>
[QUOTE="playpossum0985, post: 1809349, member: 23806"]The planchet is soft and will give, absorbing a great deal of pressure, but only to a point. Imagine blowing up a balloon in a glass jar, same basic concept, eventually it will run out of places to go. I know the mint presses slam down on the coins at very fast rate and super high pressure, I believe it is around 20 tons? Try slamming two hammers together face to face, somewhere amongst the shattered chunks you will see something called pressure flaking. The edges of some of the pieces will be sharper than surgeons scalple's. That is how thin hardened steel can shatter too, a few microns. Now if you were to try and contain all that pressure from going outward, and it had no where else to go, it will find it's own week points and damage will be more severe and localized to the faces of the hammers. It would also be feesable for the pieces to remain attached to each other due to surface tension between the erraticly formed pieces (a mechanical bond rather than a molecular). Plus the heat created with these extreme pressures could also give the fragments some bite to each other from the metal expanding naturally. If a planchet error why then no damage to the devices? Same question for a strike through? I dont believe the planchet itself would crack unless it was broadstruck, or out of collar, that would be more of a stress tear than a crack. Please correct me if I am wrong.[/QUOTE]
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05' D Oregon quarter shattered die???
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