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Article: Filters: the hows & whys. (Casting Facts).
- Article from:
- Modern Casting
- Article date:
- May 1, 2003
- Author:
CopyrightCOPYRIGHT 2003 American Foundry Society, Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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In these days of increasing quality standards, the need for tighter tolerances, better mechanical properties, more efficient production methods and reduced costs, engineers are constantly searching for every tool they can find. One approach that many metalcasters now utilize is molten metal filtration.
The premise is simple. Through the proper use of a filtration device inserted directly into the mold, castings can be produced with better mechanical properties, machinability, appearance and overall quality. These benefits are possible through lower levels of nonmetallic inclusions such as eroded sand, dross and slag. A slight reduction in metallic inclusions also ...