| 摘要 |
PURPOSE:To form a casting mold having an excellent collapsing property after casting and good surface stability by adding a specific ratio of an inorg. binder, starch binder, and water to refractory particles, packing rhe mixture thereof in a pattern and hardening the same by microwave heating. CONSTITUTION:0.5-3% An inorg. binder, and 0.5-2% a starch binder are mixed with refractory particles and water is added at 0-5% thereto, then the mixture thereof is kneaded. The mixture is packed in a pattern of hardening by microwave heating and is hardened by microwave heating and thereafter the hardened mold is removed from the pattern. Silica sand, zircon sand, alumina sand, etc. are used for the refractories, water glass, potassium silicate, etc. are used for the inorg. binder, and wheat, rye, corn, etc. are used for the starch binder. |
