| 摘要 |
<p>A filter for molten metal prior to casting in a mold has a plurality of ceramic elements in contact with each other, each element (11) having numerous apertures, e.g. slots (13) separated by ribs (12), and the contacting portions (14) of the elements are arranged, so that the apertures (13) of adjacent elements are staggered so that the metal flowing out of one aperture passes through the space (16) between adjacent elements before flowing through aperture of the next element; thus fine filtration is achieved. …<??>The distance (H) between the ribs of different elements is preferably less through the widths (W) of the aperture, e.g. H < 0.8 mm. …<??>The elements may be flat plates rectangular in shape (Figs 1-3) or circular; or frusto-conical or tubular; in the latter cases they nest one inside each other. The apertures may be rows of circular holes (Fig 21-22). Successive elements may be identical or non-identical as regards their arrangement and size of apertures. …<??>Elements can be made by injection molding and sintering of a ceramic, e.g. silica, and a binder; preferably they are microporous.</p> |
