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In fact, the repair work of injection molding machines is difficult, but it is also a process of continuous learning and progress. Just grasp the fundamental working principle of injection molding machines, grasp the fundamental working methods, and regardless of various models, it is impossible to explore a set of repair work procedures to ensure the normal operation of injection molding machines.
It is essential for repair operators to understand and grasp the content of the operation manual of the injection molding machine, familiarize themselves with and grasp the mechanical components, circuits, and oil circuits of the injection molding machine, understand the operation process of the mechanical, circuit, and oil circuits during normal operation of the injection molding machine, and understand and grasp the inspection and repair application methods of electrical and hydraulic components. Clearly distinguish between normal and abnormal work conditions to avoid misidentification and disassembly during free time.
It is necessary to understand the operation methods of the equipment and have some basic knowledge of injection molding for repair work, and be able to use the injection molding machine correctly. If you don't know how to operate the injection molding machine, maintenance work can be very difficult, and identifying faults may not be reliable. The circuit board and electrical components in the injection molding machine are affected by factors such as high temperature, environment, and time for a long time. The deviation of equipment operation points and the degree of aging of components are all within the normal range.
So, debugging the injection molding machine is also one of the essential fundamental skills in repair operations. Understanding the operating procedures of injection molding machines and debugging their electronic circuits and hydraulic circuits is a crucial step.
Repair work should be precise, reliable, and timely. It is necessary to study and grasp the content of the application manual for various types of injection molding machines. In the general repair process, the repair idea is usually circuit oil circuit mechanical component action. And the calibration work is carried out in reverse. If there is a shortage of mechanical action and locking pressure, the oil circuit and circuit can be found. If the circuit output is normal, the oil circuit valve can be calibrated.
If the oil circuit operates normally, adjust the circuit electronic board. Of course, the final adjustment is necessary, but the three are interdependent and controlled by each other. The correct use of instruments and meters, calibration of detection circuits, maintenance of oil circuits, and adjustment of the position and action of mechanical parts are important methods for identifying faults. Generally, injection molding machine manufacturers only provide the electrical block diagram of the equipment, the block diagram of the oil circuit, and the primary part of the machinery, which is not suitable for repair operations.
It is necessary to pay attention to collecting and tidying up relevant materials in daily protective work. Materials such as electrical, electronic, mechanical spare parts, oil circuits, electromagnetic valve bodies, etc. For example, in the electrical field, if there is an opportunity, it is necessary to measure the circuit schematic diagram, the schematic diagram of the electronic board, and the practical wiring diagram, and measure the corresponding equipment and materials of the wiring terminals, in order to provide accurate detection points for the identification and analysis of faults during repair. Measure the detailed parameters of its detection points. When necessary, it is also necessary to make your own power supply, simulate input and output signals, conduct imitation tests or adjustments, in order to grasp and obtain data on hand repair materials, such as parameters of various levels of operation points.
The same applies to oil circuit repair, and it is necessary to summarize, adjust, and repair according to the characteristics of the oil circuit and oil pressure solenoid valve. Whenever possible, it is important to frequently disassemble, clean, inspect, and install solenoid valves. These treatments create a lot of trouble, but they are crucial.
It is necessary to grasp and organize the principles of conformity, the methods of repairing logical system defects, and the identification program diagram for repair work. In combination with daily repair work practice, relevant materials of injection molding machines should be collected, and any defects should be dealt with. The methods include gradual inspection, imitation inspection, voltage testing, on/off testing, circuit board replacement, and other methods. After repair, it is necessary to adjust the operating points from scratch, perform calibration from scratch, and conduct load experiments to ensure that the equipment operates within the parameter range listed in the operation manual.