防止夹砂缺陷的主要措施是降低型砂的膨胀应力和提高型砂的热湿拉强度。
Reducing expansion stress of the moulding sand and increasing wet tensile strength of moulding sand are the main measures to prevent scab defect.
为减少砂芯在湿度较大环境中存放时的强度下降，可在混砂时加入抗湿剂或增加粘结剂中聚异氰酸酯的比例。
The decrease in strength of sand cores can be reduced by adding an anti-moisture agent or increasing proportion of polyisocyanate in the mixture when the cores is stored up …
该系统能够用于在线检测型砂的紧实率、湿压强度和砂温等性能，并且能够根据检测结果通过控制补加水量将型砂紧实率控制在设定的工艺范围之内。
This system can be used to test the properties of the moulding sand on line, such as sand compactability, green compressive strength, and sand temperature, a...
该系统能够用于在线检测型砂的紧实率、湿压强度和砂温等性能 ，并且能够根据检测结果通过控制补加水量将型砂紧实率控制在设定的工艺范围之内。
This paper analyzes the factors affecting the controlling precision of sand compactibility system and sets up the dynamic model of regression coefficient between sand compactibility and water content.
树脂砂铸造中，增强树脂硅砂的粘合性，提高型砂强度及抗湿性。
When used in the sand casting of resin, it can strengthen the adhesion, improve profile sand strength and antiwetting property.
树脂砂铸造中，增强树脂硅砂的粘合性，提高型砂强度及抗湿性。
When used in the sand casting of resin, it can strengthen the adhesion, improve profile sand strength and antiwetting property.
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