- The device used for this purpose is referred to as “worm press”, in which the shaft is in the shape of a continuous worm drive that fits horizontally inside the press.
- In order to increase the pressure while material is being passed through the press and to compensate for any pressure loss, the diameter of the worm housing tapers gradually in the direction of travel.
- The worm normally consists of several segments, with varying pitches and shapes, allowing the press to adapt to different nuts.
All by mechanical expression, no solvents are ever used at Caloy.