Method and plant for manufacturing a belt structure, a belt package, and a crown structure of a green tire

摘要

A method and a plant for manufacturing a belt structure of a green tire are described, wherein the belt strips (113a, 113b) which constitute the belt structure are produced in a substantially continuous manner immediately upstream of at least one assembly drum (13, 14). Such method and plant are integrated respectively in a method and in a plant for manufacturing a belt package and a crown structure incorporating the belt structure thus obtained. The method for producing the belt package provides for the subsequent formation on said belt structure of a rubber mixture layer incorporating a plurality of reinforcing cords (104), while the method for producing the crown structure provides for the subsequent assembly of a tread (105) on the belt package thus formed. The rubber mixture layer incorporating the reinforcing cords (104) and the tread (105) are both produced in a substantially continuous manner immediately upstream of at least one assembly drum (18). Advantageously, this ensures a high and constant quality level of the belt structure and of the belt package, achieving at the same time a reduction in production costs and an increase in the production capacity of the plant.