Parallel guidance by toothed rack

You see the entry in

Using 2 or 4 coupled toothed rack guides, the pressure differences in the hydraulic system of veneer or through-feed presses are compensated. The connection of the toothed racks ensures a precisely parallel lifting and lowering of the press plates and thus, prevents their jamming.

Alternatively, push rods (scissor system) are used.

Advantages of both systems:

  • no movements of the material to be pressed during pressure build-up
  • protection of the seals between the piston rod and the cylinder

Images

Zahnstangenführung 4-fach
JOOS
Schubstangen, Scherensystem (AMD Bürkle)
AMD