process for the continuous production of an extruded section having dimensions of cross section variations as a function of the length of the profiled same

摘要

In the method for the continuous production of an extruded profile having cross-sectional dimensions which vary with its length, effected with the use of an extrusion head provided with at least one movable member which is adapted to modify the section of the extrusion orifice, data and/or information representing the law of variation of the position of the movable member in dependence on the length of the extruded profile according to a predetermined model of the profile to be produced are stored on a recording medium, an operating and control unit being provided for reading information and/or data from the recording medium and for causing the controlled displacement of the movable member of the extrusion head according to the law read from the medium, the deviations from the desired value of at least one parameter of the shape of the section of the profile produced by the extrusion head being monitored and adjustment means associated with the control and operating unit being operated in dependence on the deviations detected to alter from outside the law of variation of the position of the movable member so as to minimise the deviations.