| 摘要 |
PROBLEM TO BE SOLVED: To prevent clogging from being generated on a filter device, and reduce a resistance when a gas is sucked in. SOLUTION: This injection device has a cylinder member, an injection member, a storage cylinder 29, an air suction unit 72, and the filter device 81. In this case, for the cylinder member, a molding material-feeding port is formed at a specified location. The injection member is arranged in a manner to be rotatable and longitudinally movable in the cylinder member. The lower end of the storage cylinder 29 is faced to the molding material-feeding port, and the storage cylinder 29 stores the molding material which is fed from a hopper 31. The air suction unit 72 is arranged to be higher than the storage cylinder 29, and sucks in a gas in the cylinder member. The filter device 81 is connected with the air suction unit 72 through a communicating tube 77, and removes a fine powder mixed in the gas which is sucked in through the air suction unit 72. The level on the surface of the molding material stays in the storage cylinder 29, and the molding material does not exist in an internal cylinder 73 and the section of a slit 76. Thus, the generation of the fine powder in the internal cylinder 73 and at the section of the slit 76 can be suppressed.
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