METHOD AND DEVICE FOR SCREENING SHORT FIBER OF WHISKER

摘要

PURPOSE:To improve the efficiency of screening and to upgrade the purity of classified short fibers and whiskers by introducing a solvent to the lower surface side of a sieve mesh from the outside while ultrasonically oscillating the mesh thereby generating a concn. difference in the slurry. CONSTITUTION:The slurry 8 is transferred on the sieve mesh 6 of a classifier 5 while the mesh is oscillated by an ultrasonic wave generator 3 and while the stirrer 1 is kept rotated in the stage of screening the short fibers or whiskers of inorg. fibers and metallic fibers in which powder and granular materials are mingled. Only the whiskers are screened by the slurry concn. difference between the plus sieve and the minus sieve and are recovered into a recovering tank 7 when the solvent 9 is passed under the mesh by a pump 12. The whiskers and water are thereafter separated by vacuum suction. The most powder and granular materials are separated and removed in the above-mentioned manner and the most whiskers are passed through the sieve mesh. The high-purity whiskers are thus obtd.