The laying head pipe can be divided into three sections: the first is the initial section, which is linear, in which the wire does not undergo plastic bending deformation; the second is the deformation section, in which the wire carries out plastic bending deformation with the bending shape of the tube; the third is the setting section, The plastic bending deformation of wire rod continues to form a stable coil, and the setting section is very important for the coil shape. The outlet of the spinning tube.
The end section is generally at a certain angle with the surface of the spinneret, so that the ejected coil can produce forward partial speed, and then the whole and horizontal of the spinneret can be adjusted.
The coil can be smoothly ejected from the spinning tube and laid flat on the air-cooled roller table with a horizontal angle of 10℃ to 20 ℃. The nozzle angle of most wire drawing machines is not adjustable, so when the rolling speed changes, the horizontal forward speed of the coil will be different, which will cause the coil falling on the air-cooled roller table to deviate from the set optimal condition, that is, the coil shape is not ideal. For this reason, the first section of the air-cooled roller table is generally designed in the form of adjustable height, so that the vertical distance from the spinning tray to the air-cooled roller can be adjusted. By adjusting the height of the roller table, the coil can be correctly laid on the roller table, but in actual production, it is often difficult to master due to lack of operation experience, resulting in the coil falling obliquely.
In the production of small-scale wire rod, due to the large horizontal speed, the coil is in front of the coil. When the height is not adjusted properly, the coil will be tilted on the roller table. Because the wire is thin and soft, the coil is easy to form an ellipse.