Dial indicator test accurately measures dimensional changes.
The method measures the linear shrinkage of a 1 x 1 x 8 in. (25 x 25 x 200 mm) core using a dial indicator. A core is produced and immediately placed into a fixture with a spring-loaded dial indicator. The indicator is zeroed, and as the core shrinks, negative values are recorded overtime.
Researchers have tested this method and been able to produce repeatable results. A recent study confirmed the test method is capable of detecting core dimensional changes over time with coremaking process and measurement method errors only contributing a small portion of the total changes.
|Printer friendly Cite/link Email Feedback|
|Date:||Oct 1, 2011|
|Previous Article:||Explaining shrinkage: a series of tests show how each variable in chemically bonded molds affects shrinkage.|
|Next Article:||What's your flask IQ? Flask should be regularly inspected to ensure casting quality in horizontal green sand molding. See if you can answer these...|