Journal: Transactions of the American Foundrymen's Society V 66 P 484-494, 1958 (11 p)
Author: Rabe, R A
A large percentage of the shell-mold casting scrap
is due to shell cracking and shell expansion defects.
This report covers work performed in cooperation with
the AFS Shell Molding Materials Testing Committee
(8-N) in order to determine the causes of such casting
defects when various sand and resin mixes were used.
Hot expansion and tensile strength tests of the shell
mixes were performed in the laboratory in an attempt
to correlate these tests with the expansion defects
found in test pattern castings.
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