Method and device for manufacturing belt material for tire

A device for manufacturing a belt material for a tire, comprising:

• a ribbon winding mechanism for spirally winding a ribbon formed of a plurality of cords arranged longitudinally and coated with a rubber around an outer peripheral surface of a drum at a predetermined pitch;
• a sticking mechanism for sticking side edges of the wound ribbon to each other to form a wound body;
• a wound body cutting mechanism for spirally cutting said wound body at a predetermined pitch larger than the winding pitch of said ribbon to form a belt material having a predetermined width and a cord inclination angle;
• a belt material peeling mechanism for peeling the belt material from said drum;
• a tray for receiving the belt material peeled from the drum;
• and
• a tray transportation mechanism for transporting said tray in a direction intersecting an axial line of the drum, wherein the tray transportation mechanism includes a moving table, which is movable in the direction intersecting the axial line of the drum, and a turntable, which is pivotally supported on the moving table, said tray being carried on the turntable.

A device for manufacturing a belt material for a tire comprising:

• a ribbon winding mechanism for spirally winding a ribbon formed of a plurality of cords arranged longitudinally and covered with a rubber coating around an outer peripheral surface of a drum having a predetermined outer diameter at a predetermined pitch;
• a sticking mechanism for sticking side edges of the wound ribbon to each other to form a cylindrical wound body;
• a wound body cutting mechanism for spirally cutting said wound body at a predetermined pitch larger than the winding pitch of said ribbon to form a belt material having a predetermined width and a cord inclination angle;
• a peeling shaft for peeling the belt material from said drum, said peeling shaft being capable of approaching and separating away from said drum;
• a tray for receiving the belt material peeled from the drum;
• a rotatable press-roller for pressing the belt material peeled from the drum onto the tray;
• and
• a tray transportation mechanism for transporting said tray in a direction intersecting an axial line of the drum while the belt material is pressed onto the tray by the press-roller.

A method of manufacturing a belt material for a tire comprising the steps of:

• alternately reversing first and second drums to first and second locations, the first and second drums having different outer diameters;
• spirally winding a ribbon, which is formed of a plurality of cords arranged longitudinally and covered with a rubber coating around an outer peripheral surface of the first drum arranged at the first location at a predetermined pitch, and sticking side edges of the wound ribbon to each other to form a first cylindrical wound body around said first drum;
• spirally cutting said first wound body on the first drum arranged at the second location at a predetermined first pitch larger than the winding pitch of said ribbon to form a first belt material having a predetermined first width and a cord inclination angle;
• spirally winding the ribbon around the second drum arranged at the first location to form a second wound body when said first wound body on the first drum arranged at the second location is being spirally cut;
• and
• spirally cutting said second wound body on the second drum arranged at the second location to form a second belt material when the ribbon is being spirally wound around the first drum arranged at the first location, the second wound body being spirally cut at a predetermined second pitch different from the predetermined first pitch so that the second belt material has a predetermined second width different from the predetermined first width,
• wherein the ribbons are wound around the first and second drums in directions opposite to each other and the first and second wound bodies on the drums are each spirally cut in directions opposite to each other such that cord inclination angles of the linear cords of the first and second belt materials obtained from the drums are substantially symmetric.