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| Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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what do you make moulds out of????
what I'm asking about is the materials used to build the casting moulds for little model engine crankcases. ones cast in alooominumm. what sort of head do you need in the aluminium to get a reliable mould filling? what aluminium alloys do you use for casting? which alloys do you avoid like the plague? how much venting do you guys find necessary? how long do your moulds last? TUMESFFFFFF |
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