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How Worn Can A Die Be and Still Strike MS Coins?
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<p>[QUOTE="GDJMSP, post: 3507431, member: 112"]The thing you're not accounting for is the timing of the strike sequence. From my first post on the subject I have readily agreed that metal flows to fill the rim and legends. But, the only metal that is doing that, is the metal immediately adjacent to those things. And once those things are filled - the flow in that area stops, and stops cold, it no longer continues to flow towards those things. From that point on all the metal that is flowing, is flowing towards the center of the coin.</p><p><br /></p><p><br /></p><p><br /></p><p>Well maybe this is the problem you're having, why you don't understand. What do you think 'basining" means ? Based on your comments, I can only think that you think it means the surface of the die is curved slightly. But this is not the case at all. Dies are flat, completely flat. Basining is nothing more than a word for polishing. Yes, all dies are basined, all dies are polished before they are ever used - that's what it means.</p><p><br /></p><p>Now, given that understanding, at the very instant the surface of the die fields first come into contact with the planchet - they are in contact with that surface everywhere on the planchet - at the exact same moment. So pressure is being applied everywhere on the planchet at the exact same moment. This means that the smallest recesses of the die are the recesses that are filled first. And yes, at the very same instant that is happening, metal in the rest of the planchet is also flowing towards the center. But, the recesses in the center of the dies are not filled yet, because it takes a whole lot more metal to fill them. So from that fraction of a second on, all metal on the entire planchet that is still flowing, and make no mistake it is still flowing - is flowing towards the center of the coin.[/QUOTE]</p><p><br /></p>
[QUOTE="GDJMSP, post: 3507431, member: 112"]The thing you're not accounting for is the timing of the strike sequence. From my first post on the subject I have readily agreed that metal flows to fill the rim and legends. But, the only metal that is doing that, is the metal immediately adjacent to those things. And once those things are filled - the flow in that area stops, and stops cold, it no longer continues to flow towards those things. From that point on all the metal that is flowing, is flowing towards the center of the coin. Well maybe this is the problem you're having, why you don't understand. What do you think 'basining" means ? Based on your comments, I can only think that you think it means the surface of the die is curved slightly. But this is not the case at all. Dies are flat, completely flat. Basining is nothing more than a word for polishing. Yes, all dies are basined, all dies are polished before they are ever used - that's what it means. Now, given that understanding, at the very instant the surface of the die fields first come into contact with the planchet - they are in contact with that surface everywhere on the planchet - at the exact same moment. So pressure is being applied everywhere on the planchet at the exact same moment. This means that the smallest recesses of the die are the recesses that are filled first. And yes, at the very same instant that is happening, metal in the rest of the planchet is also flowing towards the center. But, the recesses in the center of the dies are not filled yet, because it takes a whole lot more metal to fill them. So from that fraction of a second on, all metal on the entire planchet that is still flowing, and make no mistake it is still flowing - is flowing towards the center of the coin.[/QUOTE]
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