| 摘要 |
PROBLEM TO BE SOLVED: To control the rubber material of an extruded ribbon-shaped rubber at respective parts with high accuracy in a tire molding method wherein a plurality of rubber compositions are mixed while the mixed ratio thereof is changed according to a predetermined pattern to be extruded as a continuous ribbon-shaped rubber having a definite cross section changed so that the rubber material changes at least at a part of the ribbon-shaped rubber and this rubber is directly wound around a rotary support spirally to attach a rubber member having a predetermined cross section to the support. SOLUTION: Prior to the mixing of a plurality of the rubber compositions, the respective rubber compositions are individually plasticized at a treatment speed based on a predetermined mixing ratio change pattern. COPYRIGHT: (C)2004,JPO&NCIPI |
