| 摘要 |
A high-efficiency dust collecting device with two gateways is connected with exits of a cover of a sand grinder and above two sanding belt rollers., composed of a first gateway set and a second gateway set, which are both formed integrally with a metallic panel and provided respectively with a first and a second arc-like panel, a first and a second blocking plate, and two first and two second dust-guiding plates. A first and a second gateway are respectively formed between the arc-like panel and the blocking plate so as to suck in the dust or the wood flour generated while grinding a workpiece. The dust or the wood flour is then sucked further to pass through the exits to the collecting device, favored by the dust-guiding plates.
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