| 摘要 |
PURPOSE:To accelerate curing and to improve productivity by mulling a binding material consisting of an alcohol soluble phenolic resin, hydroxide or oxide of polyvalent metals,water and hydroxide of alkali metals and refractory particles, putting the mixture in a pattern, permeating CO2 therethrough to cure the mixture, removing the casting mold and heating the same with microwaves. CONSTITUTION:A binding material for a casting mold to be cured by gaseous CO2 consisting of an alcohol soluble phenolic resin, hydroxide or oxide of polyvalent metals, or both, water, hydroxide of alkali metals, and, if necessary, polyhydric alcohol and lower monohydric alcohol is prepd. The binding material is mulled with refractory particles to produce system sand which is then put into a pattern and is molded. Gaseous CO2 is permeated through the molding to cure the same. The casting mold is removed from the pattern after curing and is heated with microwaves. |
