Impact Plates/Anvils

Impact plates and anvils are critical wear components in horizontal shaft impact crushers and vertical shaft impact crushers. Positioned within the crushing chamber, these plates serve as stationary or adjustable surfaces that receive material accelerated by the rotor. When feed material strikes these plates at high velocity, kinetic energy converts to fracture energy, causing the material to break along natural cleavage planes. The geometry, positioning, and material composition of these plates determine crushing efficiency, product gradation, and wear life. Modern designs often incorporate replaceable segments or reversible configurations to maximize service life and maintain consistent crushing performance.

Impact crushing operates on the principle of accelerated material impacting stationary or semi-stationary surfaces. The rotor assembly accelerates feed material to high velocities (typically 40-80 m/s). This material then strikes the impact plates/anvils, where kinetic energy converts to fracture energy through brittle failure mechanisms. The angle of impact, velocity, and material properties determine breakage patterns. Secondary impacts occur as fragments rebound between plates and rotor, creating additional size reduction through inter-particle collision and further plate impacts.