METHOD AND DEVICE FOR TAKING OFF EXTRUSION PRODUCTS, IN PARTICULAR FOR ALIGNING THE CATERPILLAR TAKE-OFF UNIT WITH THE EXTRUSION AXIS

摘要

An endless track take-off with two or more endless tracks (10, 10') is employed. The tracks are symmetric to longitudinal axis (12) of the take-off unit (6). When extruded product (8) cross-section changes are made the change is measured and the distance of the tracks from the axis is automatically adjusted so that the axis of symmetry of the extruded product remains in line with the axis. During product (8) cross-section change the tracks above a plane through the unit axis (12) are deflected and the deflection is measured. Measured deflection is fed to a control unit which calculates the required change in distance from the axis and effects this change so that the position of tracks below the plane is also changed to ensure the product axis and endless track unit axes remain coincident. An independent claim is included for a endless track take-off unit (6) which has a system for measuring deflection of the endless tracks orthogonal to the unit axis (12).