With the continuous development of the control of the injection molding machine, the electrical control systems of the old-fashioned medium and small-sized injection molding machines mostly adopt relay control, the lines are complicated, the failure rate is high, and the maintenance is troublesome, resulting in low production efficiency.
Injection molding machine control using programmable logic controller (PLC), it has high reliability, easy programming, strong anti-interference ability, easy maintenance and other characteristics, the entire process of the PLC-based injection molding machine control system is mainly used hydraulic system and PLC With the application, the machine's actuators (motors, valves, etc.) complete the process in a certain sequence.
First, the process flow chart:
Second, the overall design of the injection molding machine control system The control device of this system uses the Taiwan giant control PLC controller A-5189 with analog and digital input as the basic control unit. The control part of the injection molding machine consists of an I/O acquisition module, a PLC controller, and a hydraulic proportional valve and a switching valve drive circuit. We will write a good program into the PLC, the PLC will then interpret the program. The I/O module uses the A-1051 model which can collect 16 digital signals. It adopts a cyclic scan working mode to collect the status signals of the injection molding machine and input it into the PLC controller. The controller then performs data processing according to the programmed program. Obtain the required output state to make the corresponding control instruction.
Third, summarize PLC because of its high standardization, high reliability, intelligent module, its application in the injection molding machine will be more and more in-depth, not only for injection, mold clamping, shooting and retracting action program control, and temperature control The closed-loop control of the pre-molding measurement process can be said to be a promising application of PLC in injection molding machines. PLC's network communication function is a powerful guarantee for PLC to become the three pillars of industrial automation. The high-speed network connection can meet the needs of various control systems for exchanging information in industrial automation. Taiwan PLC's PLC products quickly occupy the industrial automation market due to its high cost-effectiveness, wide application, and ease of use.
Taiwan giant control yottacontrol China mainland representative office address and contact information:
Contact person: Man Xiang
Contact Tel Fax: +86 0755-83452531
mailbox:
Address: Room 803, Block B, Building 4, Tianan Digital New City, Longgang District, Shenzhen, Guangdong Province, China
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