1. Traction speed
In the extrusion operation, the adjustment of the traction speed is very important. The material is melted and plasticized by extrusion, and then traction after continuous extrusion from the machine head, and then enters the shaping device, cooling device, traction device, etc. The traction speed should be consistent with the extrusion speed. match. Generally, during normal production, the pulling speed should be about 1% to 10% faster than the pipe extrusion speed.
2. Temperature control

3. Temperature of sizing device and cooling device

4. Screw speed
As the screw speed increases, the extrusion volume increases, which can increase the output, but it is easy to cause poor plasticization, causing the inner wall of the pipe to be rough and the strength to decrease. At this time, the machine head pressure should be adjusted to achieve better output and quality. The temperature control of the screw will affect the material conveying rate, plasticizing and melting quality of the material, etc. Extruding pipes requires cooling water to lower the screw temperature, which is beneficial to improving the plasticizing quality. The temperature of the screw cooling water is around 50~70 degree .
5. Compressed air and pressure