PRODUCTION OF MAGNETIC HEAD

摘要

PURPOSE:To adhere and strip cores having very samll and extremely thin shapes with high accuracy and efficiency by disposing an adhesive agent which is decomposed by a heating treatment between reinforcing cores and a jig and disposing an adhesive material which is not destroyed by said heating treatment between the reinforcing cores and metal cores. CONSTITUTION:Many reinforcing cores which are ground on one side are adhered to the prescribed position on an adhering jig 6 by an alpha-cyanoacrylate adhesive agent. Metal chips which are ground on one side are similarly adhered to the prescribed position on an adhering jig 7 by means of an alpha-cyanoacrylate adhesive agent. Both are ground to a prescribed thickness and thereafter a diluted epoxy adhesive agent 8 is thinly coated on both or one of the jigs and the reference planes 6b and 7b, 6a and 7a of the respective adhering jigs are mated to butt both cores to each other. Suitable pressing force F is exerted to the jigs and the jigs are secured by heating. The degree of vacuum is increased upon completion of epoxy adhesion and the jigs are heated to the temp. above 210 deg.C at which the alpha-cyanoacrylate adhesive agent softens and decomposes to a gaseous state. The jigs are then cooled in a vacuum and an intermediate product 9 united with metal cores 1 and reinforcing cores 2 and stripped from the adhering jigs is obtd. Another reinforcing core is further similarly adhered.