Plastic article or earthenware shaping or treating: apparatus – Reshaping – resizing or vulcanizing means for tire – tire... – Sectional female mold including locking or clamping assembly...
Patent
1992-05-15
1994-03-01
Nguyen, Khanh
Plastic article or earthenware shaping or treating: apparatus
Reshaping, resizing or vulcanizing means for tire, tire...
Sectional female mold including locking or clamping assembly...
425 49, 425 54, 425 55, 425183, 425186, B29C 3342, B29C 3502, B29D 3004
Patent
active
052901637
ABSTRACT:
An annular metal mold portion forming a tire tread is constructed by assembling a plurality of sector metal molds 2 severed in the circumferential direction, and all or some of the sector metal molds 2 are constructed of a plurality of smaller parts 3 severed in the axial direction as well as in the circumferential direction. Joining surfaces between the sector metal molds themselves each consisting of a plurality of smaller parts are formed of contour surfaces in arbitrary shape of the smaller parts. These contour surfaces are such curved surfaces that at every location a radius of curvature is 5 mm or larger and an inclination angle of a tangential plane with respect to a tire axis is 80 degrees or less.
REFERENCES:
patent: 3999907 (1976-12-01), Pappas
patent: 4411175 (1983-10-01), Takahashi et al.
patent: 5190767 (1993-03-01), Beres et al.
Kata Takehiro
Katsumata Shiro
Bridgestone Corporation
Nguyen Khanh
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