& nbsp; The HMLC-1 low-pressure casting control system uses PLC as the lower control core and an industrial control computer as the upper monitoring and management machine to achieve automatic sequential action control of the low-pressure casting machine, real-time closed-loop feedback control of the liquid level pressure pouring process, and mold cooling control. It can also set and modify pouring process parameters, display and record fault alarms, and record and query pouring process data. The control system has a high degree of automation, and the monitoring method of the upper and lower computers ensures that even in the event of a malfunction in the upper industrial control computer, the lower control system can still operate automatically according to preset process parameters, further improving system stability. The monitoring and management software adopts a standard Windows style with a full Chinese interface. It has a complete and friendly human-machine dialogue interface, with intuitive display, rich functions, and simple operation. It can easily and flexibly check, set, and adjust the pressurization process parameters and mold cooling control parameters, providing strong support and guarantee for the operation and maintenance of low-pressure casting machines and the management of process parameters& nbsp; The main low-voltage electrical components of the electrical control system adopt products from Siemens or Schneider in Germany, and the control cabinet is equipped with industrial air conditioners to ensure the reliability of the system& nbsp;& nbsp;& nbsp; The control system has been in long-term use on multiple low-pressure casting machines, with reliable performance, convenient use and maintenance, and has received unanimous praise from users, achieving good results.1 Features of the host control system: The position sensor is used to continuously detect and display the position of the dynamic plate. The machine's closing position, picking position, opening position, and acceleration/deceleration position are all digitally set on the upper computer, making position adjustment simple, convenient, accurate, and fast; The machine has various action programs such as inching, mold installation, manual, automatic, etc. to choose from; The machine has a comprehensive action interlock function and can display the machine's action interlock requirements in real-time in text mode during machine operation, providing assistance for operators to operate the machine; ● Real time display of specific machine fault information in text format, and provide detailed fault points, possible causes of fault alarms, and solutions, providing effective assistance for operators and maintenance personnel in troubleshooting. Fault records can be selected for storage and can be traced back to the equipment's fault records by year, day, and shift; ● Dynamically display the actual working conditions of the machine's hydraulic system and the status of switches at various positions of the machine in a graphical manner; ● Real time display of the working status of PLC input, output points, and functional modules; 2 Characteristics of liquid level pressurization control system: Equipped with multi-level linear pressurization function, each level of pressurization pressure and rate can be set arbitrarily within the process range. Using imported proportional valves and high-precision pressure sensors as detection and execution components, software PID adjustment method is used to achieve real-time closed-loop feedback control of the pressurization process; Real time tracking and setting of pressurization process curves to achieve various pressurization specifications; The pressurization process is automatically completed, free from human influence by operators, and has good reproducibility of the pouring process; Equipped with leakage compensation function, the pressurization process is not affected by gas source pressure fluctuations and insulation furnace leakage (within a certain leakage range), fundamentally ensuring the repeatability and reproducibility of the pressurization process; ● Automatic compensation for the increase in pressure caused by the decrease in metal liquid level in the insulation furnace after each pouring, resulting in a decrease in metal liquid level; The actual pressure and mold temperature during the pressurization process can be selected and saved, and historical pouring process parameters, pressurization pressure and mold temperature can be queried, and the deviation between the actual pressurization parameters and the set pressurization parameters can be analyzed; The liquid level pressurization control system can be independently equipped on other low-pressure casting machines. There is a complete set of pouring control devices with valve groups in the electrical control cabinet, which can be automatically pressurized and controlled during the pouring process by connecting to the compressed air pipeline network and insulation furnace. The control device of the host sends a signal to the liquid level pressurization control system after the host meets the pouring conditions; Start pressurizing” After the pouring is completed, the host control device receives the liquid level pressurization control system's signal; Pouring completed” The signal.3 The mold cooling control system has two control methods: time control and mold temperature control. It can achieve several cooling methods for molds, including air cooling, water cooling, and water air mixing; The cooling time and mold temperature can be set and displayed on the upper computer; The maximum number of cooling channels can be selected, and each cooling channel can be independently set to&quo; Work” Or&quo; Non work” Status; Each cooling channel can be independently selected as a time control or temperature control mode; ● For temperature control, the temperature detection points for each cooling channel can be selected; ● Each cooling valve can be manually tested on the monitoring interface;
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