marlinspike
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I have a piece of copper that I use as a heat sink when welding. It's about 5" square, about 2mm thick. Like most learners I have a problem blowing through the metal on the car body, even when using the thin metal technique.
However, not really understanding the physics of heat transference, I was wondering if there is a preferred size and shape of copper that folk would recommend. There are plenty of flat copper bars on eBay - would say, a 5mm thick by 3cm wide bar be a better heat sink than my current 2mm sheet? Does the heat spread down or across? What are the rest of you guys using? Thanks for any suggestions.
However, not really understanding the physics of heat transference, I was wondering if there is a preferred size and shape of copper that folk would recommend. There are plenty of flat copper bars on eBay - would say, a 5mm thick by 3cm wide bar be a better heat sink than my current 2mm sheet? Does the heat spread down or across? What are the rest of you guys using? Thanks for any suggestions.