A DEVICE WITH A MICROCONTROLLER THAT KEEPS THE TEMPERATURE STABLE DURING THE PRODUCTION OF PLASTIC PIPES

Abstract

The quality of plastic pipes is negatively affected by many destabilizing factors, which include improper operation of the traction mechanism, vacuum forming, cleanliness of the forming head, dependence on the screw, etc. All these destabilizing factors affect the quality of the product. But an important destabilizing factor among these reasons, of course, is the temperature of the molten raw material and its stability over the entire production cycle. Due to the inaccurate setting of the temperature of the raw material and its change during the production process, the raw material can be more or less liquid or viscous, which directly affects the quality of the pipe. Due to the temperature error, it is difficult to accurately determine the wall thickness of a plastic pipe. When the pipe is stretched to the required thickness, intramolecular deformations of the pipes may occur, which can have a deplorable effect on the operation of the pipes in the future. Therefore, all pipe manufacturers pay special attention to temperature control. The article analyzes the process of thermal stability of raw materials, proposes a scheme for accurately setting and maintaining a stable temperature based on microprocessor technology, and a full-scale verification of the work done. Experiments have shown the correctness of theoretical studies. Keywords: Proportional-integral-derivative controller, temperature control, control program, automatic control device, heating element, differential, temperature error, deformation, exploitation, melt raw materials, a heating element.