The VSI Impact Crusher is advanced and high-efficiency equipment. The VSI Impact Crusher in my company is the latest researched results basing on Germany technology. The machine is professional in producing qualified sand and stone for highway, high-speed railway, high building, city project, hydropower dam constructions, and concrete mixing plant. The VSI Crusher is popular to be used in artificial sand making and stone reshaping industry. Working Principle of 1. Center Feeding: 2. Ring Feeding: Features Of JOYAL