Patent Number: 7,612,310

Title: Manufacturing method of a molded gear

Abstract: A gear piece having a hollow portion of the same shape as a molded gear is formed by performing electrical discharge-machining with respect to a metal member that is smaller in thickness than a tooth width dimension of the molded gear, using a first discharging electrode; a chamfer-application piece having a recess portion of the same shape as the chamfered portions of the molded gear is formed by performing electrical discharge-machining by only a predetermined depth with respect to other metal member, using a second discharging electrode; a molding die is assembled by according the hollow portion of the gear piece with the recess portion of the chamfer-application piece; and the molded gear is manufactured by forming a gear member using the molding die.

Inventors: Ojima; Masaaki (Kawaguchi, JP), Yoshida; Yasutoshi (Kawaguchi, JP)

Assignee: Enplas Corporation

International Classification: B23H 1/00 (20060101); B23H 9/00 (20060101)

Expiration Date: 1/03/02017