Wear tip holder for VSI crusher, and method of reducing wear of VSI crusher rotor

A vertical shaft impact crusher (VSI) for crushing material, the VSI crusher comprising:

• a rotor having a vertical rotor wall;
• and
• a wear tip holder arranged to hold a wear tip adjacent to an outflow opening of the vertical rotor wall, said wear tip holder including a mounting plate for mounting the wear tip holder to the vertical rotor wall of the rotor;
• a wear body connected to said mounting plate, the wear body having an elongate recess arranged to receive the wear tip to hold the wear tip adjacent to the outflow opening, the mounting plate having a mounting face abutting the rotor wall and, opposite the mounting face, a wear face facing an interior of the rotor;
• and at least one material retention groove extending along the wear tip recess at a position upstream, as seen in a direction of a flow of material to be crushed, of the wear tip recess, the material retention groove opening into the interior of the rotor into the flow of material to be crushed and having an upstream groove wall and a downstream groove wall, said downstream groove wall forming an acute angle with the wear face for trapping the material to be crushed in said material retention groove.