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Application of furan resin in large gray iron castings

Furan resin can be divided into urea formaldehyde furan resin, phenol urea formaldehyde furan resin, formaldehyde sugar alcohol resin and high sugar alcohol resin. The price of UF resin is low, because of its high nitrogen content (5% – 11%). Although the strength of resin sand is high, the...

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Design principle of riser for large gray iron castings

In the past, riser design basically followed the principle of sequential solidification, which needs to meet the following three conditions: (1) . the solidification time of molten iron in the riser shall not be less than the solidification time of the feeding position. (2) There is enough iron water...

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