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Article: Perils of oil contamination: keeping a closer eye on how hydraulic oil enters your molding sands may be the answer to poor casting finish mysteries. (part 2)
- Article from:
- Modern Casting
- Article date:
- July 1, 1992
- Author:
CopyrightCOPYRIGHT 1992 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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If you're experiencing poor casting finishes from your green sand molding systems, there may be something lurking in your sand. Leaving many clues behind, the source of the damage is elementary--it's hydraulic oil.
Green sand molding systems are the recipient of many undesirable materials. In many cases, problems associated with these materials have such a minor effect on final production that the cost of preventing or eliminating a particular contaminant doesn't justify corrective action. Yet in other cases, the effects of the contamination can be so severe that replacing all of the sand in the system may be necessary.
With the increased use of pressurized ...