Plasticization device, three-dimensional shaping device, and injection molding device

A plasticization device comprising:

• a cylindrical rotor rotating centered on a rotation axis by a drive motor, the cylindrical rotor having an upper surface connected to the drive motor, a bottom surface, and a side surface that connects the upper surface to the bottom surface, the bottom surface having a groove forming surface in which a first groove portion is formed along a rotation direction;
• a rotor case configured to accommodate the rotor;
• a barrel having a flat surface that faces the first groove portion of the bottom surface of the rotor, a through hole being formed in the barrel that communicates with the first groove portion;
• and
• a heating unit, wherein
• a material supplied between the first groove portion and the flat surface of the barrel is plasticized by rotation of the rotor and heating by the heating unit to flow out from the through hole, and
• the side surface of the rotor has
• a material guiding port configured to guide the material to the first groove portion, and
• a second groove portion formed by a flight portion that spirally protrudes outward from the side surface, and the second groove portion is configured to feed the material supplied between the rotor and the rotor case to the material guiding port.