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<p>[QUOTE=&quot;GDJMSP, post: 332546, member: 112&quot;]OK, think about what you just said - now think about how the rim is formed. The die doesn&#039;t even touch the edge of the planchet, the edge of the planchet is encased by the collar. The rim is formed last, just like the high points of the coin as the metal is pushed up, from the fields, into the die.</p><p><br /></p><p>Metal flows inward and outward both at the same time. Why ? Because you have 2 high areas to fill - 1 being the rim and the other being the center of the coin (devices). The greatest pressure is actually exerted midway across the radius of the planchet. That&#039;s because the planchet is basically flat except for the upset edge. The only extra metal there is in the planchet comes from the area of the planchet that will become the fields of the coin. It is this extra metal that is pushed outwards to fill the collar and form the rim, and at the same time it is pushed inwards to fill the recesses of the dies forming the devices.[/QUOTE]</p><p><br /></p>

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