METHOD FOR CLEANING SCREW AND PADDLE OF KNEADER FOR EPOXY MOLDING COMPOUND BY USING SHOT BLAST APPARATUS

摘要

PURPOSE: A method for cleaning a screw and a paddle of a kneader for epoxy molding compound is provided to decrease the abrasion or damage of the paddle or screw as well as to reduce the time and the cost of cleaning while giving good cleaning effect. CONSTITUTION: The method for cleaning a screw and a paddle of a kneader for epoxy molding compound(EMC) comprises the steps of: (i) disassembling an assembly of the paddle and the screw in the kneader after the kneading process of the EMC, deposing the disassembled paddle and/or screws in a shot blast apparatus; and (ii) projecting abrasives onto the paddle and/or the screw to eliminate the remaining EMC cured products and impurities which are present on the paddle and/or the screw. In the step (ii), the abrasives are projected in an amount of 30-35 kg/min. As abrasives, high carbon cast steels of spherical-shape with a diameter of 1-5mm or of cut wire-shape with a diameter of 0.5-1mm and a length of 0.5-2mm are employed alone or in a mixture of at least two having a different size.