TERMINAL CAULKING METHOD FOR ELECTROLYTIC CAPACITOR

PURPOSE:To improve air-tightness by buckling a stepped rivet having a large diameter part at the area under the neck of rivet and allowing the large diameter part thereof to eat the rubber part of a phenol resin laminated plate attaching a rubber plate. CONSTITUTION:A stepped rivet providing a large diameter part, having the length of 10 to 15% of the total length of rivet and diameter of 105 to 110% of the axis diameter of the small diameter part of rivet, under the neck of the rivet 4 is inserted into a hole at the bending part of a terminal 3, the bending part and the rear surface of head of rivet are welded, a rivet is inserted into the insertion hole of a phenol resin laminated plate 5 attaching a rubber plate from the side of rubber plate and a washer 6 is applied to the end part of stepped rivet. Thereafter, the end part of rivet is pressed with an exclusive press 7. The small diameter part of rivet is buckled into a large diameter part. The large diameter part is buckled in the radial direction, strongly eating the rubber plate. Accordingly, the caulking part of terminal is perfectly sealed.