| 摘要 |
PROBLEM TO BE SOLVED: To enhance the molding accuracy of a rubber strip to suppress the deterioration of tire uniformity.SOLUTION: An apparatus 1 for manufacturing a rubber strip, capable of intermittently forming a rubber strip Gs comprises: a rubber extrusion apparatus 2 including a rubber extruder body 6 for extruding an unvulcanized rubber Gu toward a discharge port 6d and an extrusion head 8 having a pre-molding port 10 for pre-molding the unvulcanized rubber Gu extruded from the discharge port 6d; and a calendar head 3 including a pair of calender rolls 3b and 3c for rolling the pre-molding rubber strip Gp to mold the rubber strip Gs. The opening area of the pre-molding port 10 is 120-160% of the cross section of the rubber strip Gs.SELECTED DRAWING: Figure 1 |
