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为提高型芯的抗拉强度,以粉末材料高岭土、硼酸镁晶须以及硅藻土为添加剂,用单因素实验考察了不同粉末的增强能力,并采用混料实验设计的原理进行配方设计,通过回归分析得到抗拉强度与3组分之间的回归方程,方差及残差分析表明该回归模型具有较高的显著性.实验结果表明:在不考虑加入量的情况下,高岭土、硼酸镁晶须和硅藻土的增强效果依次增加;采用混料设计其复合增强效果更好,且当高岭土/硼酸镁晶须/硅藻土3组分的质量比为0.0∶0.4∶0.6时,型芯的增强效果最好,抗拉强度可达到2.5MPa.
In order to improve the tensile strength of the core, powder materials kaolin, magnesium borate whiskers and diatomaceous earth as additives, using a single factor experiment investigated the enhanced ability of different powders, and the use of mixed experimental design of the principle of formulation design, by Regression analysis showed that the regression equation, variance and residual analysis between the tensile strength and the three components showed that the regression model has a higher significance. The experimental results show that: without considering the amount of addition, kaolin, magnesium borate crystal And the reinforcing effect of diatomite and diatomaceous earth increases in turn; the composite strengthening effect is better with the mixture design, and when the mass ratio of the kaolin / magnesium borate whisker / diatomite 3 component is 0.0: 0.4: 0.6, the core The best enhancement, tensile strength can reach 2.5MPa.