The electrical operating system of hot chamber die casting machine is mainly composed of motors, electrical components, instruments, and electrical circuits.
The electrical operating system of hot chamber die casting machine is usually controlled by the PLC (Programmable Logic Controller) to achieve precise control of each mechanism of the die casting machine. There are some steps for electrical operation system of hot chamber die casting machine
- Brief summary of the electrical operation system of the machine
- Hydraulic and pneumatic control
- While the machine is working
- Combustion Furnace Control Unit
- Total power
- Environmental protection
Brief summary of the electrical operation system of the machine
Hydraulic and pneumatic control systems for hot chamber die casting machines play a vital role in modern industry. Traditional hot chamber die-casting machines are usually equipped with open-loop control systems to operate the hydraulic systems that drive the injection function. However, with the development of technology, many new hot chamber die casting machines utilize proportional control hydraulic drive systems.
Hydraulic and pneumatic control for Electrical operation system of hot chamber machine
The hydraulic and pneumatic control device is mounted in the cabinet. It provides three sets of program modes, i.e. “MANU”, “SEMIAUTO”, and “AUTO”, “PULLING CORE SELECT”, “DIE HIGH SELECT”. There also are some buttons on it, such as the “EMERGENCY STOP” button, “ACC CHARGE” button, and other buttons.
“semi-automatic”： close the front and back guard gate， startup oil pump， let the machine set to its original state， and the transform option switch set on the position of “SEMIAUTO”， open the front guard gate，
press the “DIE CLOSE” buttons with two hands， close the front guard gate， just open and close the front guard gate, and the second operation can go on. (If you chose push button to die closing, make sure that have closed the front guard gate first, then press the die close button with both hands, complete one period action, and continue the second action, just press the die close button with both hands).
Servo energy-saving hydraulic control system:
The servo energy-saving hydraulic control system realizes high control accuracy and energy saving through the use of components such as servo motors, oil pumps, tanks, and reversing valves.
This type of system realizes precise control of the hydraulic system through communication between the upper computer and the programmable logic controller (PLC), as well as setting operating parameters on the touch screen.
Electro-hydraulic servo system design and control:
The design of the electro-hydraulic servo system takes into account the needs of precision hot press molding machines, and significantly improves the production efficiency and product yields through the direct-drive electro-hydraulic servo system and fuzzy PID control algorithm.
Integrated Injection Cylinder for Electrical operation system of hot chamber machine:
The design of the integrated injection cylinder simplifies the structure, reduces pressure loss, and improves system stability.
Pump-valve composite control hydraulic system:
The pump-valve composite control hydraulic system realizes the fine control of the injection molding machine through the synergistic work of constant displacement hydraulic pumps and servo motors.
Pneumatic control of hydraulic systems:
Pneumatic control of hydraulic systems through pressure regulating valves, pneumatic control valves, and pneumatic booster pumps and other components, to achieve a simple and economical control of the hydraulic system.
When the machine is operating in the “Manual” mode, the correct operational procedures are as follows: close the front and back guard gate； Press the “DIE CLOSE” buttons with two hands and complete the die-closing action.; Press the “INJECTION” button and then release the button and complete the injection return action; Die-opening cooling press the “DIE OPEN” button and complete the die-opening action.
When the machine is operating in the “AUTO” mode, let the machine be in the condition of the home position, close the front and back guard gate， Press the “DIE CLOSE” buttons with two hands at the same time and the operation will start. In the condition of “automatic”， after the action of pressing the “DIE CLOSE” buttons with two hands， the machine will work go round and begin again.
When need to emergency stop, press the red “EMERGENCY STOP” button. For more information about related technical parameters adjustment, please refer to the human-computer interface. When the working pressure of the hydraulic system pipeline is above 12MPa, the relief valve will automatically overflow.
While the machine is working
all operating sequences （operate）main command signal will achieve different movement cycles by the control of the PC.
Combustion Furnace Control Unit:
the control system of the combustion furnace adopts a 220V AC power source， and 220V AC relay control circuit， In the control panel, there are three temperature-control instruments with a digital display and two ammeters. One of the ammeters for controlling the temperature of the crucible has over high-temperature alarm.
The thermostatic control option can be set by a temperature-control instrument with a digital display. When the heaters are started, the control circuit operates and the
working currents of electrical heating elements can be shown in their respective ammeters. Heat it until the established temperature, the temperature-control instrument controls the heating component to cut out, and when it is lower than the established temperature, the temperature-control instrument controls the heating component to electrify. It can also control automatic burner is heated or not.
Total power for Electrical operation system of hot chamber machine:
a) Heating by Combustion furnace, the total power of the machine will not be less than 15kVA.
b) Heating by electrical furnace, the total power of the machine will not be less than 55kVA.
The main role of the hydraulic system in a hot chamber die casting machine is to provide stable power to ensure that the closing and opening of the molds as well as the filling process of the metal runs smoothly. For example, the HM series hot chamber die-casting machine ensures the stability and high quality of the production process through the enhanced hydraulic control system. In addition, the use of servo control systems can further improve the speed and accuracy of die casting.
Environmental protection
Accurate calculation and positioning control: The motion control and accurate calculation capabilities of PLC are used to achieve accurate control of key parameters such as injection speed and boost pressure.
Conclusion
In conclusion, the hydraulic and pneumatic control systems of hot chamber die casting machines greatly improve the efficiency of the die casting process and product quality by providing stable power and precise control.