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July 31 2012 at 12:21 PM
Greg Lundy  (Login BALLISTIC1)
Crosman Forum Member
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Response to investment casting ( real world term) nt

Extruding is exactly the correct term and it works ALMOST exactly like the Play Dough FunFactory. An aluminum billet approximately 6" in diameter 3' long is loaded into this big hydraulic press it is heated but not to melting... The die is inserted into the machine and it squirts out the desired shape... Investment casting usually involves making a mold, casting a positive of wax, inspecting wax positive for voids, defects, etc. And if all is good the positive is made into a mold and when the metal flows in the wax is melted out and the metal fills the void... It is also called 'lost wax' method... It is called investment casting because it is a sustantial time and effort to produce parts this way.. It is cheaper to cast a 'Bad Part' out of wax than metal.... Greg

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