Rotor and manufacturing process of rotor

A rotor comprising:

• a plurality of magnets which are arranged in a circumferential direction around a center axis that extends in a vertical direction;
• a laminated core in which a plurality of thin plate cores are laminated in an axial direction;
• and
• an injection molded resin portion;
• wherein
• the laminated core includes an inner core portion which axially extends in a cylindrical shape in a region located farther radially inward than the plurality of magnets, and a plurality of outer core portions which are arranged in the circumferential direction in a region located farther radially outward than the inner core portion;
• the plurality of outer core portions and the plurality of magnets are alternately arranged in the circumferential direction;
• each of the plurality of magnets includes a pair of end surfaces in the circumferential direction which are magnetic pole surfaces;
• the magnetic pole surfaces of the plurality of magnets of the same pole face each other in the circumferential direction;
• the outer core portion includes a through-hole which penetrates in the axial direction;
• the resin portion includes an upper resin portion which covers upper surfaces of the laminated core and the plurality of magnets, a lower resin portion which covers lower surfaces of the laminated core and the plurality of magnets, an outer resin portion which covers radially outside surfaces of the plurality of magnets, and a columnar portion which extends in the axial direction in the through-hole and connects the upper resin portion to the lower resin portion;
• the resin portion includes a gate mark portion at which a gate of a mold is positioned during injection molding;
• the gate mark portion is positioned farther radially outward than the inner core portion;
• and
• at least a portion of the gate mark portion is positioned farther radially inward than the through-hole in plan view.