Sand making stone double roller crusher machine The roll crusher, also known as roller crusher, double roll crusher or teeth roll crusher, is suitable for medium and fine crushing of hard and medium hard ores and stones in industries of ore beneficiation, chemical, cement, refractory matter, grinding materials, building materials, etc. The roll crusher or roller crusher is with better crushing performance than that of ordinary crushers, thus making it widely used in all over the world. Roller crusher working principle The crushed stone materials fall between two rollers through the feeding port for crushing, and the finished materials fall naturally. In case of hard or unbreakable materials, the roller can automatically retreat by the action of a hydraulic cylinder or spring, so as to increase the roller clearance and drop the hard or unbreakable materials, which can protect the roll crusher from damage. There is a certain gap between the two opposite…