Extrusion device and extrusion method

An extrusion device for a plastic profile, with an extruder, an extrusion nozzle arranged at the exit of the extruder for forming the plastic profile, wherein the plastic profile is subsequently guided through a calibration device, a downstream removal device for the plastic profile and a cutting device for separating parts of the extruded plastic profile, comprising:

• a profile monitoring device for detecting at least one profile parameter of the plastic profile in the extrusion direction after it has emerged from the extrusion nozzle and/or
• a process monitoring device for detecting at least one process parameter in and/or before:
• the extruder,
• the extrusion nozzle,
• the calibration device,
• the removal device, and/or
• the cutting device,
• wherein the data of the profile monitoring device and/or the process monitoring device is used by a control device to adjust at least one manipulated variable or a set of manipulated variables on the extruder, on the extrusion nozzle, on the calibration device, on the removal device and/or on the cutting device as a function of the data,
• wherein the control device is configured to perform a mathematical optimization of a set of manipulated variables under at least one constraint with respect to a value of the at least one profile parameter, the at least one process parameter and/or the at least one manipulated variable of the set of manipulated variables and wherein the at least one constraint is a penalty function,
• wherein the at least one manipulated variable on the extruder is at least one of the group of:
• a mixture setting of at least one of the plastic fed to the extruder, the temperature, and/or a rotational speed of the extrusion screws,
• a temperature which can be set by a temperature control device;
• or
• a fluid flow which tempers at least a part of the plastic profile inside the extrusion nozzle and/or outside the extrusion nozzle;
• and
• wherein the at least one manipulated variable at the calibration device is at least one of the group of:
• a temperature and/or a pressure, in a dry and/or wet calibration and/or a water flow rate in a wet calibration;
• or
• a positioning change of at least one dry calibration device with respect to the extrusion nozzle.