Abstract: In a manufacturing method of a rack shaft, the rack shaft is formed by mounting a shaft raw material on a receiving groove of a lower mold, the receiving mold having an approximately U-shaped cross section, thereafter arranging an upper mold having a rack-teeth-forming teeth portion formed in a rectangular shape in a bottom view and capable of oscillating in a width direction of the receiving groove around a center in the width direction of the rack-teeth-forming teeth portion, in such a manner that the center of oscillation lies on a vertical line of a center in a width direction of the rack teeth, pressing the shaft raw material in the diametrical direction, deforming the shaft raw material along the receiving groove, and thereafter deforming the shaft raw material while oscillating the upper mold so as to form a rack teeth.

Abstract: In a manufacturing method of a rack shaft, the rack shaft is formed by mounting a shaft raw material on a receiving groove of a lower mold, the receiving mold having an approximately U-shaped cross section, thereafter arranging an upper mold having a rack-teeth-forming teeth portion formed in a rectangular shape in a bottom view and capable of oscillating in a width direction of the receiving groove around a center in the width direction of the rack-teeth-forming teeth portion, in such a manner that the center of oscillation lies on a vertical line of a center in a width direction of the rack teeth, pressing the shaft raw material in the diametrical direction, deforming the shaft raw material along the receiving groove, and thereafter deforming the shaft raw material while oscillating the upper mold so as to form a rack teeth.

Abstract: An electrical connection is formed by using a double laminated conductive fine particle provided with a conductive metal layer on the surface of a spherical elastic base particle by electroless plating and electroplating and a layer of a low-melting-point-metal on the surface of the conductive metal layer and wherein the conductive metal layer comprise a plurality of metal layers.

Abstract: An electrical connection is formed by using a double laminated conductive fine particle provided with a conductive metal layer on the surface of a spherical elastic base particle by electroless plating and electroplating and a layer of a low-melting-point metal on the surface of the conductive metal layer and wherein the conductive metal layer comprises a plurality of metal layers.

Abstract: The present invention has its object to provide a manufacturing device for making conductive particles that efficiently permit a placed layer of uniform thickness to be formed over each of all particles without aggregating the particles in a plating liquid.

Abstract: The present invention has its object to provide a manufacturing device for making conductive particles that efficiently permit a placed layer of uniform thickness to be formed over each of all particles without aggregating the particles in a plating liquid.

Abstract: A method for making conductive particles that efficiently permit a plated layer of uniform thickness to be formed over each of the particles without aggregating the particles in a plating liquid.