| 摘要 |
PROBLEM TO BE SOLVED: To quantitatively supply a powder raw material, by preventing a bridge caused in the powder raw material, while restraining powder pressure of the powder raw material from being directly transmitted to the passage outlet side, in a powder carrying passage.SOLUTION: The powder bridge preventive device is arranged in the powder carrying passage surrounded by a casing, and prevents the bridge caused in the powder raw material supplied from a passage outlet by passing through the powder carrying passage, and comprises a core arranged in the direction for crossing with the carrying direction of the powder raw material in the powder carrying passage, a rotary member rotatingly driven around the core and a rotatingly driving device for rotatingly driving the core and a plurality of rotary members, and the core is arranged so as to substantially cover the passage outlet in the carrying direction of the powder carrying passage. |
