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Hooch cooling system pushing out water from cap
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<blockquote data-quote="DaveKamp" data-source="post: 214378" data-attributes="member: 5122"><p>Okay, so if you look extremely close at the fire ring, you'll see that there's no seam anywheere. That's because when that fire ring is made, it's a copper sleeve... and they 'spin' form a flange on one side.</p><p></p><p>Here's a neat look at how spin-forming works... on copper, and this one is a CNC machine...</p><p></p><p>The gasket material is a sheet that comes off a roll. A cutting die punches the two bore holes, and a square, then the punch retracts, they place two copper rings into the holes, then cycle the press again, with a secondary die from below that comes UP, and forms the lower copper of the sleeve into a flange... then continues upward, curling it inward, and then flat against the gasket material.</p><p></p><p>What you're seeing as being 'fatter', is just the area of the formed copper as it transitions from being flat against itself, to being crimped over the gasket material.</p></blockquote><p></p>
[QUOTE="DaveKamp, post: 214378, member: 5122"] Okay, so if you look extremely close at the fire ring, you'll see that there's no seam anywheere. That's because when that fire ring is made, it's a copper sleeve... and they 'spin' form a flange on one side. Here's a neat look at how spin-forming works... on copper, and this one is a CNC machine... The gasket material is a sheet that comes off a roll. A cutting die punches the two bore holes, and a square, then the punch retracts, they place two copper rings into the holes, then cycle the press again, with a secondary die from below that comes UP, and forms the lower copper of the sleeve into a flange... then continues upward, curling it inward, and then flat against the gasket material. What you're seeing as being 'fatter', is just the area of the formed copper as it transitions from being flat against itself, to being crimped over the gasket material. [/QUOTE]
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Hooch cooling system pushing out water from cap
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