The Plastic Extruder Machine control system includes heating systems, cooling systems and process measurement system, usually by the electrical, instrumentation and implementing agencies component. Its main role should be to: control and dangerous the key auxiliary drive motor, the output meet the technical requirements of speed and power, and allows coordination from the main auxiliary; testing and damaging plastic extruder temperature, pressure, flow; to realize management of the full unit or automatic control. Out from the electric control unit drive control could be put into two parts and temperature control to achieve the extrusion process, including temperature, pressure, screw rotation, screw cooling, cylinder cooling, product cooling and diameter from the control, and traction speed, neat lines and rows for the reel to be sure a clear chair plate to full plate in the constant tension take-up control.

To reflect the extrusion head of situations, need to test out the nose when the pressure did not die because of domestic pressure sensor extruder, the general thrust is measured after the screw extrusion head pressure measurement replace the screw Load Table (ammeter or voltmeter) to accurately reflect the size of the extrusion pressure. Extrusion pressure fluctuations, but also the quality of instability caused by out of one of the important factors, fluctuations in extrusion pressure and extrusion temperature, cooling system, the duration of continuous operation is closely related to other factors. When an abnormal phenomenon, can be excluded quickly ruled out, must re-organization of production downtime should be decisive, not only can avoid the increase in waste, better prevention of accidents. By detecting the pressure gauge readings, you can know when the pressure in extrusion plastic state, and generally limit the alarm after the thrust control.

Wire and cable insulation and sheathing are based on thermoplastic extrusion plastic deformation, so that the flow pattern in the sticky. In addition to requirements of the external screw and barrel heating, spread the melted plastic to make out, but also when considering plastic screw extrusion of its own heat, thus requiring a whole host of temperature should be considered, it is necessary to consider the heating heater open and shut, but also consider the extrusion screw to cool the heat spillover factor, to have effective cooling facilities. And requested the right to determine a reasonable location of the thermocouple measurement devices and installation methods, instrument readings from the temperature sections accurately reflect the actual temperature of the host. And require the precision of temperature control instrumentation and systems with the good, the whole fluctuation of temperature control system of the host stability to a variety of plastic extrusion temperature requirements.

To ensure the products mentioned above the size of the cable diameter, in addition to the core requirements of the Line of Control (cable core) outside dimensional tolerances in the extrusion temperature, screw speed, line speed traction control, etc. should be guaranteed, the outer diameter measurement and control is a comprehensive reflection of the level of precision and control. In the extrusion unit equipment, especially high-speed extrusion production line, should be equipped with line diameter detector, cable diameter were detected at any time, and the ultra poor signal feedback to adjust the screw speed traction or to correct external diameter tolerance.

Screw speed and stability in the regulation of the host drive one of the important process requirements. Screw speed directly determines the amount of the adhesive and extrusion speed, the normal production always want to achieve the highest possible speed and to achieve high yield, the extruder screw speed requirements of the work from start to the desired speed, speed range available to be large. But also for high speed stability, because the speed fluctuation will lead to fluctuations in the amount of extrusion, impact extrusion quality, so no change in the speed traction situations, it will cause changes in cable diameter. Similarly, such as wire-speed traction device can also cause large fluctuations in changes in cable diameter, screw speed and traction through the operation of the platform reflected the appropriate instrument, extrusion should be closely observed to ensure quality and high yield.

This is a high-speed extrusion line should have the process control requirements, mainly: Power temperature interlock; work stress protection and interlock; out, pulling the two parts of the ratio of synchronous drive control; closing line of synchronization with the traction control; diameter line detection and feedback control; according to the different needs of various component parts of the stand-alone machine tracking and control.

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