随着现代高效率铸型压缩方法的引用,对铸型材料性质的水平和均匀性的要求也在不断提高。为此,必须对水和澎润土含量的变动容许值作更严格的限定。但是,澎润土的损耗率则因铸型内所制造的铸件形状和壁厚及在型腔内的配置等的所谓的铁/砂比而受到影响。 With the introduction of modern high-efficiency mold compression methods, the requirements for the level and uniformity of the properties of the mold material are also increasing. For this reason, the allowable value of water and bentonite must be more strictly defined. However, the loss rate of bentonite is affected by the so-called iron / sand ratio, such as the shape and wall thickness of castings manufactured in the mold, and the arrangement in the cavity.