Resin sand casting 15 questions if you answer?

1. Why is phosphoric acid mostly used as the curing agent of high nitrogen furan self hardening resin, but rarely used as the curing agent of low nitrogen furan self hardening resin? This is due to the low nitrogen and high furfuryl alcohol resin. When acid is used as the curing agent, the curing speed … Continue reading Resin sand casting 15 questions if you answer?