Top rollers are used in pairs to form the glass ribbon with precise control of its width and thickness.
Each pair works synchronously and thereby creates optimal conditions for a smooth production process.
The most important component of each top roller is the knurl.
The knurl is a type of gearwheel with a tooth profile, which is screwed onto a hollow shaft and specially adapted to the application process.
A servomotor allows for infinitely adjustable rotation speed of the knurl.
A rotary transmission at the end of the hollow shaft ensures optimal cooling water supply for the shaft and the knurl.
Installed in a water-cooled casing pipe, the knurl with its drive shaft is optimally equipped to operate inside the hot tin bath.
All machine movements, such as extension and retraction, angle adjustment and positioning relative to the glass ribbon, as well as the so-called nip, are effected by electric motors. Manual operation of all machine movements is also possible, e.g. to remove the machines from the tin bath in order to avoid serious damage to the machines or plant in the unlikely event of power failure.