BEARING SEAT, BALL JOINT, AND METHOD OF MANUFACTURING METHOD OF THE BEARING SEAT

摘要

PROBLEM TO BE SOLVED: To provide a ball seat 16 which prevents the occurrence of burrs when released from a mold.;SOLUTION: The ball seat body 41, on which an inclination angle α of an inclined plane 45 to the direction intersecting the axial direction perpendicularly is made to be equal to or larger than an inclination angle β to the axial direction at the inner edge side of a first opening 43, is formed at the outside circumferential side including an equator A2 of a spherical core 55 having an outer diameter dimension D1 approximately equal to a ball part. When the ball seat body 41 is released from the mold against the core 55 by pressing the ball seat body 41 from one end side by a stripper plate 56 of a roughly cylindrical shape whose inner diameter dimension D2 is larger than the outer diameter dimension D1 of the core 55, the one end side of the ball seat body 41 is disabled to bite between the outside circumferential side of the core 55 and the inside circumferential side of the stripper plate 56, so that burrs due to biting can be prevented.;COPYRIGHT: (C)2010,JPO&INPIT