Two-stage feeding system, two-stage building machine, uni-stage building machine, and feeding method

A two-stage feeding system, comprising a frame;

• a laminating drum arranged on the frame;
• a first belt layer conveying template used for conveying a first belt layer and a second belt layer conveying template used for conveying a second belt layer arranged at one side of the laminating drum;
• a tread conveying template provided on the other side of the laminating drum for conveying the tread;
• and a control device electrically connected to the laminating drum, the first belt layer conveying template, the second belt layer conveying template and the tread conveying template, respectively, characterized in that,
• the laminating drum can move in a first direction to switch between a first preset position and a second preset position;
• the first belt transport template is disposed below the laminating drum, and the first belt transport template can be close to or far away from the laminating drum;
• the second belt transport template is provided on one side of the bonding surface of the laminating drum and is located above the first belt transport template, and the second belt transport template can move along a second direction so as to approach or move away from the laminating drum;
• the tread conveying template is placed above the laminating drum, and the tread conveying template can be close to or far away from the laminating drum;
• when said laminating drum runs to said first pre-set position, said control device controls said first belt layer delivery template to move in the direction close to said laminating drum so as to laminate said first belt layer onto said laminating drum, and said control device controls said second belt layer delivery template to move in the direction close to said laminating drum so as to laminate said second belt layer onto said laminating drum;
• when the laminating drum moves to the second preset position, the control device controls the tread delivery template to move towards the laminating drum so as to laminate the tread onto the laminating drum.