| 摘要 |
A scarifier for preparing molding sand comprises a housing made in the form of a closed vessel, a drive shaft with fixed arms, on each of which blades are detachably secured. The blades are coated with a high strength material, such as "Ledurit", at the ends with a thickness equal to S, on a flat surface - equal to S, where S= 5 ÷ , and on the flat surface - S= 3 ÷ . |
