Method and system for manufacturing tire member

A system for manufacturing a tire member comprising a plurality of extruders configured to extrude constituent members made of a plurality of different types of unvulcanized rubber and manufacturing, while determining predetermined quality of an elongated tire member formed by bonding the plurality of types of constituent members, the tire member,

• the system comprising:
• a conveying device configured to convey the tire member in a longitudinal direction;
• an X-ray inspection device configured to apply X-rays to a predetermined length range of the tire member from a top surface side of the tire member being conveyed by the conveying device to acquire image data based on X-ray transmittance of the predetermined length range;
• a calculation device to which the image data is input;
• and
• a control device configured to control rotation of a screw disposed in each of the extruders
• and having a configuration in which
• a process of acquiring the image data is continuously performed, the image data of the predetermined length range continuous without gaps in the longitudinal direction is acquired, based on contrast in each piece of the image data acquired, a magnitude of variation in the predetermined quality of the tire member in the longitudinal direction is calculated by the calculation device, and the variation is corrected by controlling, based on the magnitude of the variation calculated, a rotation speed of a screw disposed in at least one of the extruders by the control device.