Tire forming method

A tire building method, comprising the following steps:

• step 1, manufacturing a first carcass assembly on a carcass drum, and transferring the first carcass assembly to a building drum through a first carcass transfer device;
• step 2, manufacturing a second carcass assembly on a belt drum, and transferring the second carcass assembly to the building drum through a second carcass transfer device;
• step 3, on the building drum, respectively driving a first chuck seat and a second chuck seat to move oppositely by a first nut and a second nut, with both the first nut and the second nut sleeved on a lead screw, until arriving at a set position to form a building bladder, and inflating the building bladder to support the first carcass assembly;
• step 4, sleeving the second carcass assembly on the supported first carcass assembly, and fitting the two carcass assemblies together and rolling the same to form a third carcass assembly;
• step 5, processing the third carcass assembly to form a fourth carcass assembly;
• and
• step 6, dismounting the fourth carcass assembly from the building drum, thus completing the tire building operation,
• wherein, the specific steps of transferring the first carcass assembly to the building drum through the first carcass transfer device are as follows:
• step 2-1, preparing:
• the first carcass transfer device is entirely at a waiting position, and a turn-up device faces a carcass drum;
• an oil cylinder on a supporting device retracts back to take back a roller and to cause the roller to leave a balance seat;
• and then, a rotating device rotates, so that a transfer ring device faces the carcass drum;
• step 2-2, clamping:
• the oil cylinder on the supporting device extends out, so that the roller is supported on the balance seat, and the first carcass transfer device moves toward the carcass drum;
• when the first carcass assembly is located in a transfer ring device, the first carcass transfer device stops moving;
• and then, the transfer ring device clamps the first carcass assembly located on the carcass drum;
• step 2-3, transferring:
• the first carcass transfer device moves toward the building drum, and after the transfer ring device leaves the carcass drum, the oil cylinder on the supporting device retracts back to take back the roller and to cause the roller to leave the balance seat;
• and then, the rotating device rotates 180 degrees, so that the turn-up device faces the carcass drum;
• and the oil cylinder on the supporting device extends out, so that the roller is supported on the balance seat, and the first carcass transfer device moves toward the building drum;
• step 2-4, releasing:
• after the transfer ring device sleeves the first carcass assembly on the building drum, the first carcass transfer device stops moving;
• and then, the transfer ring device releases a green tire and sleeves the first carcass assembly on the building drum;
• and
• step 2-5, waiting:
• the first carcass transfer device moves toward the carcass drum and moves to the waiting position.