Paper Making Machinery Roller

Rollers for Calender Machine mainly including chilled roll, oil heating roll, steam heating roll, rubber roll, calendar roll and mirror roll, a three roller calender consists of 3 main calender rolls arranged vertically in a stack. The paper web passes through the nips between these rolls under heat and pressure to produce the desired finish.

The rolls are:
Hard Roll or Calender Roll - Usually a chilled cast iron or steel roll that provides high linear pressure and smoothing action. Located as the center roll.
Soft Roll - Made of a compressible cotton, fabric, polymer or rubber covering over a metal core. The soft roll is located on top and helps distribute pressure.
Heated Roll or Oil Heating Roll - A hollow steel roll heated with steam/thermofluids. Located at the bottom. Heats and softens the paper surface. We call Steam heating roll.
The paper web passes through the top nip between the soft and hard rolls first. It then goes through the bottom nip between the hard roll and heated roll.
Pressure in the nips can be adjusted by mechanical loading systems or hydraulics. Temperatures and roll positions can also be controlled.
This 3 roller arrangement provides conditioning and glossing in a relatively compact design. More rolls can be added for more sophisticated calendering effects. Proper roll technology is crucial for performance.