Tape cartridge, tape reel, and method of producing reel hub

A tape reel, comprising:

• a first flange;
• a second flange;
• and
• a reel hub disposed between the first flange and the second flange, wherein
• the reel hub includes
• a cylindrical metal ring, and
• a molded body formed of a synthetic resin, the molded body including a first resin portion formed on an inner peripheral surface of the metal ring and a second resin portion formed on an outer peripheral surface of the metal ring, and
• the first resin portion includes a plurality of first recessed portions formed at intervals in a circumferential direction of the metal ring.

A method of producing a reel hub, comprising:

• disposing a metal ring in a first mold that includes a columnar portion facing an inner peripheral surface of the metal ring, a first base portion that is integrally formed with the columnar portion and faces one end of the metal ring in an axial direction, and a plurality of ridges that extends along the axial direction and protrudes from an outer peripheral surface of the columnar portion toward the inner peripheral surface of the metal ring;
• combining a second mold with the first mold, the second mold including a cylindrical portion facing an outer peripheral surface of the metal ring and a second base portion that is integrally formed with the cylindrical portion and faces the other end of the metal ring in the axial direction;
• and
• injecting a synthetic resin material between an outer periphery portion of the columnar portion and an inner peripheral surface of the cylindrical portion via an injection port formed between the columnar portion and the second base portion.