Unheated solid chilled cast iron rolls with integrated or bolted-on journals are often being used in Hardnip Calenders / Machine Calenders with two or more rolls. We will be happy to talk to you about possible improvements of your production process with regards to design details of the rolls.
Today’s Hardnip Calenders / Machine Calenders with two or more rolls, Soft-, Super- and Multinip Calenders are normally powered by heated chilled cast iron rolls with peripheral bores. The thermal transfer from heating medium to the roll surface of the peripheral bore system is superior and energy saving compared to other flow principles. On top of the proven flow principles Monopass, Duopass and Tripass we have developed the Counterpass system which provides an especially homogeneous distribution of the temperature over the roll surface.
These alloyed and especially wear resistant heated rolls which are being manufactured using the spin casting process score with a very homogeneous and if necessary even thicker hard layer than our DuraTherm Rolls.
Heated rolls made from nodular iron with peripheral bores used as an intermediate roll in a Multinip Calender ensure a safe operation of the individually used roll cover by means of minimization of the temperature difference between inner and outer diameter of the cover.