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furan resin sand casting
푸란수지사주물의 결함과 대책
1.Porosity and pinholes Causes： Measures to prevent pore defects In response to the above reasons, take the following corresponding countermeasures:Select resin with low nitrogen content and try every means to reduce the…
푸란 수지 모래 주조 원료의 주요 기술 변수
1.Furfuryl alcohol content The furan resin with acid as a catalyst generally contains more than 50% furfuryl alcohol. The most commonly used is urea-formaldehyde furfuryl alcohol resin. As the furfuryl alcohol content…