JB/T 54378-1999

Foundry machinery manufacturers use this standard to classify and grade the quality of continuous screw blade resin sand mixers. Quality inspectors and customers rely on this standard to determine whether a mixer meets the levels of qualified, first-class, or premium product. This standard helps unify product quality assessment within the industry and improve manufacturing quality.

铸造机械制造企业使用本标准来对螺旋叶片式树脂砂连续混砂机进行质量分等和定级。质检人员和用户依据本标准判断混砂机是否达到合格品、一等品或优等品水平。该标准有助于统一行业内的产品质量考核，提升制造水平。

This standard establishes a quality grading system for continuous screw blade resin sand mixers, classifying products into three grades: qualified, first-class, and premium. It covers requirements for performance, working characteristics, accuracy, reliability, safety and hygiene, completeness, appearance, packaging, material and heat treatment, part machining, assembly, painting and rust prevention, and user service. Higher grades impose progressively stricter criteria on accuracy reserve, bearing temperature rise, noise, and key part pass rates. Test methods and sampling evaluation follow referenced standards.

本标准规定了螺旋叶片式树脂砂连续混砂机的质量分等体系，将产品分为合格品、一等品和优等品三个等级。标准覆盖了使用性能、工作性能、精度、可靠性、安全卫生、配套性、外观、包装、材质热处理、零件加工、装配、涂漆防锈及用户服务等多个方面的要求。各等级对精度储备量、轴承温升、噪声、关键零件合格率等指标有逐级提高的要求。试验方法和抽样评定依据相关引用标准执行。