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RE: Any Ideas On Casting Blanks?

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Posted by Bill HIgdon (willard561@aol.com) on May 30, 2000 14:38:05 UTC

Steve & Co.
If you can find a library with Scientific American back to about 1940, you should be able to find an article in the Amature Scientist column from a ATM who cast his own blank during the WW 2 time. He couldn`t buy a pyrex blank, and a truck load of pyrex baking dishes wrecked close to him. So he picked up the glass from the wreck and cast his own blank. This article was also in the Amature Scientist book covering the 1940`s & 50`s. The library in Ogden UT removed it because of too many "hazardous ideas". I would recommend the article though as a good recipe from someone did it. Oh yes his mold was made out of refractory grade graphite as I remember. and he used a normal Kiln. Given the thermal mass, a good PID Temp control should work fine. I have seen these controllers used in semi-cond. manufacturing and they show up surplus all of the time.
Bill Higdon

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