What Do the Numbers Mean?
Find out which sand tests you should be doing on a regular basis and what aspects of your sand system the tests are measuring that will help you produce good castings. SCOTT HONEYMAN, CARPENTER BROTHERS, INC., MINNEAPOLIS
be done regularly? What tests can be done less frequently? What do the tests actually measure anyway? Metalcasters have two primary reasons for green sand testing:
W 26 | MODERN CASTING December 2014
hat does a minimum green sand testing program look like? What tests need to
• To check the consistency of the prepared green sand.
• To determine if the green sand has the physical and chemical proper- ties to produce good castings. Poor quality sand can lead to a number of casting-related defects. To ensure the properties necessary to avoid casting defects and produce
the quality you desire consistently throughout the entire green sand sys- tem, metalcasting facilities need to test their green sand daily for: • Compactability. • Moisture. • Specimen weight. • Permeability. • Green compression strength.
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