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Lab talk, the good, the bad, and the ugly
Metal
Milled Bridges Rocking Again
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<blockquote data-quote="vurban210" data-source="post: 220278" data-attributes="member: 693"><p>When it comes to the bars I am referring to only the spruing part, not the milling process. And I should correct myself, I do not use preformed bars but when a feeder bar is required I will make my own from wire wax. (hard to explain in writing and I will take some photos.) The reason is that when casting it is important to always cast thick to thin. (in mass) Most of these bars that are preformed have small feeders, then a large runner bar and then again small feeders. So it is thin-thick-thin and this makes for troubles. </p><p></p><p>More importantly is the placement of everything in the ring and controlling where the cooling happens. That is the key, you can't stop the forces but you can control them.</p></blockquote><p></p>
[QUOTE="vurban210, post: 220278, member: 693"] When it comes to the bars I am referring to only the spruing part, not the milling process. And I should correct myself, I do not use preformed bars but when a feeder bar is required I will make my own from wire wax. (hard to explain in writing and I will take some photos.) The reason is that when casting it is important to always cast thick to thin. (in mass) Most of these bars that are preformed have small feeders, then a large runner bar and then again small feeders. So it is thin-thick-thin and this makes for troubles. More importantly is the placement of everything in the ring and controlling where the cooling happens. That is the key, you can't stop the forces but you can control them. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Metal
Milled Bridges Rocking Again
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