Patent ID: 7335010

Claim:
A device for producing rigid plastic pipes of an approximately cylindrical shape, the device comprising: an extruder; and a calibrating station disposed downstream of said extruder following in a direction of production, said calibrating station having an axis and calibrating tools for calibrating an outside diameter of an already partly hardened pipe, said calibrating tools bearing against an outside wall of the pipe, said calibrating tools having lamellae and spindles respectively connected to said lamellae, said lamellae being adjustable in a radial direction perpendicular to said axis of the calibrating station and a feed axis of the pipe being extruded for adapting to different desired outside diameters of the pipes being calibrated; gear wheels meshing with said spindles, said lamellae forming lamellae rings each having a plurality of said lamellae distributed over a circumference of the pipe being calibrated, said plurality of said lamellae of each of said lamellae rings concurrently radially adjustable by said gear wheels; and a gear ring having lateral gear rings concentrically surrounding the pipe; said gear wheels meshing with said lateral gear rings of said gear ring, said gear wheels being rotary driven by said lateral gear rings of said gear ring.