| 摘要 |
The present invention comprises a worktable (100) and a silencer (200). The worktable comprises: an inlet port (110) opened on one side through which powder is entered; and a suction port (120) communicated with the inlet port (110), opened downwards, and arranged on the lower part of the inlet port (110). The silencer comprises a silencer body (210) and a silencing tool (220). The silencer body comprises: a discharge chamber (211) arranged on the lower part; a first silencing chamber (212) arranged above the discharge chamber (211); a second silencing chamber (213) arranged above the first silencing chamber (211); and a third silencing chamber (214) arranged above the second silencing chamber (213). The silencing tool comprises a suction pipe (221) having one end communicated with the suction port (120) of the worktable (100) and the other end communicated with the first silencing chamber (212); a first silencing pipe (222) having one end communicated with the first silencing chamber (212) and the other end communicated with the third silencing chamber (214) comprising a plurality of through-holes (222a) arranged on the circumference; and a second silencing pipe (223) having one end communicated with the third silencing chamber (214) and the other end communicated with the discharge chamber (211) comprising a plurality of through-holes (223a) arranged on the circumference. Thus, the present invention can improve a silencing function and can efficiently discharge the powder. |
