I thought vacuum metal casting would require a giant rig the size of my car, or that jewelry casting machine that can only do tiny parts like rings. Turns out it's both cheap and easy to build one for your application! DavidF from AlloyAvenue forums was nice enough to share the details.All that's required is a trip to a steel yard to get a pipe and a base plate. I also got a barbed fitting (MPT) to connect to my vacuum pump. After drilling a hole in the large steel pipe I threaded it with an MPT tap, screwed the fitting in, then used RTV (high temp silicone sealant 300 F) to attach pipe to the base plate and put some RTV around the fitting as well. Flanged perforated flasks (ordered from jewelry supply or custom-built) go in the pipe. The flange lip hits the top of the pipe and a silicone gasket (also bought, or you could use RTV again) provides a vacuum seal. When investment mold is inside the vacuum flask with wax model already melted out, just start the vacuum before pouring metal. Hydrogen and other gases that cause porosity are sucked out through dried
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Бусины в украшениях. - Бисероплетение "М.К." - 162 photos
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Cute Little Butterfly Pendant Tutorial // Jewellery Makaing At Home //Materials Used :-1. 6 mm rondelle2. 4 mm rondelle3. 11/0 seed bead ( 2 colors) 4. drop ...
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