Mixer

A mixer comprising:

• a housing extending in one direction, the housing including a supply port provided at a first end portion in the one direction and a discharge port provided at a second end portion in the one direction;
• a first rotary shaft provided in the housing across a first end and a second end of the housing in the one direction;
• and
• a first rotary body mounted on the first rotary shaft inside the housing, the first rotary body being configured to convey a material supplied from the supply port toward the discharge port while mixing the material as the first rotary shaft rotates,
• wherein the first rotary body comprises:
• a first main body having a cylindrical shape and extending in the one direction, the first main body including a first recessed portion recessed in a helical shape, the helical shape advancing in a direction in which the material is conveyed by the first rotary body as the helical shape turns in a rotation direction of the first rotary shaft;
• and
• a plurality of first scrapers provided in the first recessed portion and arranged along the first recessed portion, and
• wherein each of the plurality of first scrapers has a first inclined surface inclined so as to press the material toward the discharge port by rotation of the first rotary shaft.