Aluminum shrinkage?

ArtMetal
Bramblebush


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Posted by Jack Fisher on April 09, 19100 at 17:30:12:

Well here goes, my first question to you folks. I've already done a search of the archives but was not able to find the information I need, and

the books I have don't give me a close enough clue. My question is about aluminum shrinkage when sand casting.

I'm under the impression that shrinkage may be as high as 10 percent, is this true? If not what would you say is a reasonable shrinkage

amount to factor in when creating patterns. I may be able to create my own pattern ruler based on the information.

The part I'm casting is an army tank track link about 8 x 2 x 1/2 inches in dimensions, I have to do about 200 of them and I intend to use

petrabond sand for molding.

TIA

Jack Fisher


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