Molding materials for non-ferrous casting
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United States of America Patent
Stats
-
Feb 13, 2018
Issued Date -
N/A
app pub date -
Dec 14, 2016
filing date -
Dec 18, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A molding material mixture for producing casting molds for metal processing, particularly for non-ferrous metals, such as aluminum or magnesium, is intended to reduce problems such as metal-mold reaction and/or shrinkage porosity defect. The free-flowing refractory molding material in the molding material mixture is coated with a mixture of inorganic salts exhibiting a eutectic melting point in the range of about 400 C to about 500 C, particularly in the range of about 420 C to about 460 C. Preferably this coating occurs by contacting the inorganic salt mixture with the molding material mixture at a temperature between 500 C and 700 C, in a manner that maintains the free-flowing nature of the coated product. One mixture of inorganic salts that is used is a mixture consisting of, by weight: 74% potassium fluoroborate; 15% potassium chloride; and 12% potassium fluoride. This mixture has a eutectic melting point of 420 C.
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International Classification(s)
- 2016 Application Filing Year
- C04B Class
- 1471 Applications Filed
- 1077 Patents Issued To-Date
- 73.22 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C04B Class
- 38.42 % this patent is cited more than
- 7 Age
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