Shaping apparatus for a synchronizer ring

A shaping apparatus for a synchronizer ring having:

• synchronizer ring carrying means for carrying thereon a synchronizer ring on which a frictional material is set at a predetermined position;
• pressurizing means movable relative to said synchronizer ring carrying means;
• and
• heating means for heating said synchronizer ring carrying means and said pressurizing means;
• wherein said pressurizing means is provided with a pressurizing member, an intermediate member selectively movable in a predetermined direction relative to said pressurizing member, and oil groove forming means adapted to effect a relative movement with respect to said pressurizing member coincident with that of said intermediate member, to press, together with said intermediate member, the entire frictional material against said synchronizer ring when said intermediate member is stationary relative to said pressurizing member, and to move transversely to said predetermined direction when said intermediate member moves relative to said pressurizing member and thereby form oil grooves in the frictional surface of said frictional material in the longitudinal direction and the circumferential direction of said synchronizer ring;
• and
• biasing means for normally biasing said oil groove forming means so as to oppose said transverse movement thereof and hold said oil groove forming means in a predetermined non-groove-forming position relative to said intermediate member.