In the process of blown film production, the uniformity of film thickness is a very key indicator.
The uniformity of the longitudinal thickness can be controlled by the stability of the extrusion and traction speed, while the uniformity of the transverse thickness of the film generally depends on the precision manufacturing of the die. , And change with the change of production process parameters. In order to improve the film thickness uniformity in the transverse direction, an automatic transverse thickness control system must be introduced. Common control methods include automatic die head (thermal expansion screw control) and automatic air ring. Here we mainly introduce automatic air ring. Principle and application.
