The present invention discloses an extruder for producing a thermoplastic material having a first and second portion comprising an axially extending barrel and a screw conveyer axially disposed within said barrel so as to define a passage for conveying thermoplastic material from an input through a melt zone to an output. The crude product composition contains from 0. When it is determined that the security kit is mounted, or the security function is made effective, an electronic mail address of a device manager is received by starting a notifying destination setting mode and displaying a notifying destination setting screen on a display part. Moreover, the thermal element prevents failure of the voltage regulator element by open circuiting the current path when the heat dissipated by the voltage regulator element, thermally coupled to the thermal element causes the thermal element to enter a high resistance state. In the method, the step of moving of the magnetic powder into the inside of the cavity is performed after the start of the application of the magnetic field.