I Application Solution of CMC CM530HLS Tension Control Dedicated Inverter for Blown Film Machine
Principle of Blown Film Machine:
A blown film machine consists of an extruder, die head, mold, cooling device, bubble stabilizer, gusset plate, haul-off rollers, and winding device. It relies on the rotating screw inside the extruder to push plastic pellets toward the die. Due to friction between the plastic and the screw or barrel, as well as internal particle collisions, combined with external heating, the plastic gradually melts. The molten plastic is filtered through the die head and exits from the mold. It is then cooled by an air ring, inflated, passed through the gusset plate and haul-off rollers, and finally wound into a film roll by the winding unit.
Solution Description:
The tension system of the blown film machine includes the screw extruder inverter, haul-off roller inverter, and tension winding inverter. The screw extruder and haul-off roller inverters use CMC's CM530H vector control inverters to ensure stable extrusion torque and haul-off speed. The winding inverter uses CMC's CM530HLS dedicated tension control inverter. This system eliminates the need for a tension arm and tension sensor, relying only on internal diameter calculation to control output torque, simplifying the mechanical structure and reducing user costs.
Advantages of CMC CM530HLS Tension Control Dedicated Inverter:
1. Replaces traditional torque motors without changing existing operating habits, no additional thermal loss, and significant energy savings;
2. No encoder feedback required, saving cost while reducing interference and failure points;
3. Automatic diameter calculation ensures precise tension control, especially maintaining constant material tension during acceleration and deceleration.
CMC's CM530HLS dedicated tension control inverter can also be applied to slitters, cast film machines, paper-making, printing, packaging industries, and other open-loop tension control applications where encoders are not required.
II Application Solution of CMC CM580HLS Tension Control Dedicated Inverter for Coating Machine
Advantages of CMC CM580HLS Tension Control Dedicated Inverter:
1. Winding speed is controlled in closed-loop using encoder feedback, ensuring high precision in diameter and torque calculations and stable control;
2. Automatic diameter calculation ensures precise tension control, especially maintaining constant material tension during acceleration and deceleration;
3. Output torque is calculated based on roll diameter, saving space required for installing tension rollers and reducing mechanical costs;
4. Capable of high-speed non-stop roll changing, improving production efficiency.
CMC's CM580HLS tension control dedicated inverter can also be applied to slitters, leather processing machines, printing machines, and other applications requiring high-precision torque control with PG card support.
Principle of Blown Film Machine:
A blown film machine consists of an extruder, die head, mold, cooling device, bubble stabilizer, gusset plate, haul-off rollers, and winding device. It relies on the rotating screw inside the extruder to push plastic pellets toward the die. Due to friction between the plastic and the screw or barrel, as well as internal particle collisions, combined with external heating, the plastic gradually melts. The molten plastic is filtered through the die head and exits from the mold. It is then cooled by an air ring, inflated, passed through the gusset plate and haul-off rollers, and finally wound into a film roll by the winding unit.
Solution Description:
The tension system of the blown film machine includes the screw extruder inverter, haul-off roller inverter, and tension winding inverter. The screw extruder and haul-off roller inverters use CMC's CM530H vector control inverters to ensure stable extrusion torque and haul-off speed. The winding inverter uses CMC's CM530HLS dedicated tension control inverter. This system eliminates the need for a tension arm and tension sensor, relying only on internal diameter calculation to control output torque, simplifying the mechanical structure and reducing user costs.
Advantages of CMC CM530HLS Tension Control Dedicated Inverter:
1. Replaces traditional torque motors without changing existing operating habits, no additional thermal loss, and significant energy savings;
2. No encoder feedback required, saving cost while reducing interference and failure points;
3. Automatic diameter calculation ensures precise tension control, especially maintaining constant material tension during acceleration and deceleration.
CMC's CM530HLS dedicated tension control inverter can also be applied to slitters, cast film machines, paper-making, printing, packaging industries, and other open-loop tension control applications where encoders are not required.
II Application Solution of CMC CM580HLS Tension Control Dedicated Inverter for Coating Machine
Solution Description:
Coating machines are mainly used in surface coating processes for films, paper, and similar materials. They apply a functional layer such as glue, paint, or ink onto the base material in roll form, dry it, and then rewind it. High requirements are placed on the coating process—not only must the coating be highly uniform, but also high-speed, non-stop roll changing must be achievable to improve production efficiency. Coating machines typically use specialized multi-functional coating heads capable of various types of surface coating. Both the unwind and rewind sections are equipped with full-speed automatic splicing mechanisms, usually controlled automatically via PLC with closed-loop tension control.
Advantages of CMC CM580HLS Tension Control Dedicated Inverter:
1. Winding speed is controlled in closed-loop using encoder feedback, ensuring high precision in diameter and torque calculations and stable control;
2. Automatic diameter calculation ensures precise tension control, especially maintaining constant material tension during acceleration and deceleration;
3. Output torque is calculated based on roll diameter, saving space required for installing tension rollers and reducing mechanical costs;
4. Capable of high-speed non-stop roll changing, improving production efficiency.
CMC's CM580HLS tension control dedicated inverter can also be applied to slitters, leather processing machines, printing machines, and other applications requiring high-precision torque control with PG card support.
