| 摘要 |
PURPOSE: A cylinder for a raw material supply device is provided to safely operate a cylinder rod even if a rotary body is rotated by supplying air into a cylinder body through an air supply hole. CONSTITUTION: A cylinder(210) for a raw material supply device comprises a cylinder body(212), a cylinder cover(220), a cylinder rod(230), first and second air injection ports(214,244), and a rotary body(240). The cylinder rod is coupled to the cylinder body and is moved forward and backward through the cylinder cover. The first and second air injection ports are coupled to the cylinder body and the cylinder cover and supply air to the inside the cylinder body. The rotary body is coupled to the cylinder cover. The first air injection port or the second air injection port is coupled to the rotary body.
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