There are two sets of drums in the tufting machine, which are a high-speed drum group and a low-speed drum group. Different drums can form high and low fluff states.
Considering the tightness of the yarn and the installation space of the air valve, each group of rolls is divided into two, and the upper and lower parts are arranged separately. The yarns are arranged on the corresponding drums according to the parity, and each yarn passes through a high-speed drum. and a low speed roller. The spring piece, the hook knife, the auxiliary piece and the cylinder form a whole, which swings left and right with the connecting rod.
The control signal of the control board controls the action of the solenoid valve. The opening and closing of the solenoid valve leads to the movement of the cylinder, and the action of the cylinder is transmitted to the moving piece through the spring.
The control is divided into two groups: one group pushes the pinch wheel to compress the yarn on the drum, so that the yarn will move downward with the rotation of the drum; the other group will push the spring plate, which is determined by the change of its position Whether to cut the yarn. The difference in drum speed results in different speeds of yarn delivery, which determine the pile height of the tufted carpet. When the yarn is transported from top to bottom, the bottom cloth on the base cloth conveying tube moves from right to left at a certain speed under the drive of the thorn cylinder. When the yarn runs through the base fabric to the lowermost end with the needle, the hook knife also moves synchronously through the yarn from the rightmost end to the leftmost end. After that, the thread feeding needle is lifted up with the movement of the cam. If the spring piece is on the far left relative to the hook knife, then the spring piece, the hook knife, the moving piece and the cylinder move to the right together as a whole, and the spring piece will be hooked. The yarn moves to the right with the base fabric. At this time, the hook knife and the cutting knife form a scissor edge. When the yarn and the base fabric move to the place of the cutting knife together, the knife edge of the cutting knife and the hook knife are closed, and the cutting knife will cut the yarn and form the yarn. The loop pile is cut to form cut pile.
If the spring piece is always on the far right relative to the hook knife, then when the spring piece, the hook knife, the moving piece and the cylinder swing left and right together, since its speed is greater than the movement speed of the base fabric, the yarn will not be affected by the spring piece Hook, but come off from the hook knife, then the loop pile formed by the yarn will not be cut by the cutter, and the loop pile will be formed on the base fabric.
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