Rigid core mold removal device and tire manufacturing method
AssigneeSumitomo Rubber Industires Ltd.
InventorHiroyuki Onimatsu
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a tire T comprises a step for forming a green tire on the outside of a rigid core mold 2, a step for vulcanization-molding and obtaining a tire-accompanying rigid core mold G, a step for setting, at an assembly station P3, a core 5 taken out from the tire-accompanied rigid core mold G, and a removal and assembly step for removing one core segment 3 from the tire T by moving in inwardly in the tire radial direction from the tire-accompanying rigid core mold G and mounting it on the core 5 set at the assembly station. The removal and assembly step is performed for every core segment in the tire, whereby a rigid core mold 2 is assembled at the assembly station P3, while removing the rigid core mold 2 from the tire T.
Claims20
A tire manufacturing method which is a method for manufacturing a tire and characterized by comprising
- a step for forming a green tire on an outside of an assembling type rigid core mold,
- the rigid core mold comprising
- a core main portion formed in a circular ring having a central hole including the tire revolution axis, by arranging a plurality of core segments in the tire circumferential direction, and
- a cylindrical core being able to fit in the central hole and able to be removed from the central hole by its axial movement,
- wherein
- by being fitted, the core allows each core segment to be fixed in the tire radial direction and the tire circumferential direction, and
- by being removed, the core allows the core segments to move inwardly in the tire radial direction,
- a step for obtaining a tire-accompanied rigid core mold by vulcanization-molding the green tire together with the rigid core mold,
- a step for
- removing the core from the tire-accompanied rigid core mold and
- setting the core at an assembly station, and
- a core segment removal and assembly step for
- removing one of the core segments from the tire by moving it inwardly in the tire radial direction from the tire-accompanied rigid core mold from which the core is removed, and
- mounting it on the core set at the assembly station,
- wherein
- the removal and assembly step is performed for every core segment in the tire, whereby the rigid core mold is assembled at the assembly station while removing the rigid core mold from the tire.
A rigid core mold removal device which is an apparatus for removing a rigid core mold from a tire-accompanied rigid core mold made up of the rigid core mold and an vulcanized tire formed on the outside thereof, and characterized in that
- the rigid core mold includes
- a core main portion formed in a circular ring having a central hole including the tire revolution axis by arranging a plurality of core segments in the tire circumferential direction, and
- a cylindrical core being able to fit in the central hole or able to be removed from the central hole by its axial movement,
- and it is an assembling type in which
- by being fitted, the core allows each core segment to be fixed in the tire radial direction and the tire circumferential direction, and
- by being removed, the core allows the core segments to move inwardly in the tire radial direction, and
- the apparatus has
- a core holding unit for taking out the core from the tire-accompanied rigid core mold, and holding it,
- a tire holding unit for
- pressing a tread portion of the tire of the tire-accompanied rigid core mold from which the core has been taken out, from the outside in the tire radial direction, and
- holding it,
- a segment removing unit
- being able to enter the central hole of the tire-accompanied rigid core mold held by the tire holding unit
- for coupling with one core segment through the central hole,
- pulling it inwardly in the tire radial direction from the tire, and
- removing it from the tire, and
- a segment assembling unit for
- receiving the core segment from the segment removing unit and
- mounting the core segment on the core held by the core holding unit.
Dependencies are inferred from the claim text.