| 摘要 |
A filter apparatus (l5) includes a mesh filter (20) consisting of a flexible sheet which has a smooth surface and a multiplicity of through-holes (2l) and is formed into a cylindrical configuration. The leading edge of a scraper (3l) is brought into contact with the outer surface of the cylindrically formed mesh filter, or two scrapers (30, 3l) can be provided on the inner and outer surfaces of the mesh filter with their leading edges against these surfaces. Provided within the mesh filter is a support shaft (l6) serving also as a discharge pipe. The discharge pipe discharges clean oil filtered by the mesh filter, and the support shaft rotatably supports the mesh filter. The cylindrical mesh filter is disposed in a tank (l) for accommodating cutting oil or abrading or machining oil containing solid foreign matter such as cutting chips or abrasive grains. The mesh filter is rotated on the discharge pipe/support shaft by a drive mechanism (24-27). The oil containing the solid foreign matter is passed through the cylindrical mesh filter from the outer to the inner side thereof so that the foreign matter in the oil is trapped by the through-holes. The foreign matter thus trapped is scraped off the mesh filter by the scraper or scrapers as the mesh filter rotates. |
