The core of injection molding machine repair work is to determine the fault and fault handling. It involves a wide range of knowledge, complexity, depth (such as a comprehensive professional knowledge level). It is necessary to have a basic knowledge of mechanical equipment maintenance, but also have the basic knowledge of hydraulic maintenance, but also have the basic knowledge of electrical maintenance. In fact, the maintenance of injection molding machine that is difficult, but they continue to learn the progress of the process, as long as the grasp of the basic working principle of injection molding machines, master the basic working methods, regardless of various models, ever-changing, can explore a set of maintenance Work procedures to ensure the normal operation of injection molding machine operation. Maintenance workers must first understand and grasp the operating manual of the injection molding machine, familiar with and grasp the mechanical parts of the injection molding machine, circuits and circuits, to understand the normal operation of the injection molding machine, circuit and circuit work process, understanding and Grasp the use of electrical components, hydraulic components inspection and maintenance methods. Clear normal working conditions and abnormal working conditions, to avoid time-consuming misjudgment and misassembly. Maintenance work must understand the operation of the equipment and have some basic knowledge of injection molding, and the proper use of injection molding machine. If you do not know the operation of injection molding machine, overhaul is very difficult to determine the fault may not be reliable. Injection molding machine circuit boards and electrical components long-term high temperature, environmental, time and other factors, the work of the device offset point, the degree of aging components, are within the normal range. Therefore, debugging injection molding machine is also one of the basic skills necessary for maintenance work. Understand the working procedure of the injection molding machine, debug the injection molding machine electronic circuit, hydraulic circuit is a very important part. Maintenance work to be accurate, reliable and timely, must be on all types of injection molding machine instruction manual to study and grasp the general maintenance process, the maintenance idea is usually the circuit - oil - mechanical parts movements. The calibration work in turn, such as mechanical action and clamping pressure * missing, you can find the oil circuit and the circuit, such as the circuit output is normal, then adjust the oil valve. If the normal oil circuit is adjusted circuit electronic board. Of course, the final adjustment, but the three interdependence, mutual control. Correct use of instrumentation, calibration testing circuit, maintenance of oil, debugging machinery part of the position and action is to determine an important means of failure. General injection molding machine manufacturer only gives the electrical block diagram of the equipment, the block diagram of the oil circuit and the main part of the machine, which is not enough for the maintenance work. Must pay attention to routine maintenance work, collect, organize all aspects of the relevant information. Such as electrical, electronic, mechanical spare parts, oil, solenoid valve body and other aspects of the information. For example, if there is a chance of electrical circuit diagram will be mapping, mapping the schematic diagram of the electronic board and the actual wiring diagram, measuring the terminals corresponding to the device and other relevant information so that the maintenance of the fault diagnosis and analysis to provide accurate Check the point to. Measured the specific parameters of the test point. When necessary, but also make their own power supply, analog input and output signals, simulation tests or adjustments to master and obtain first-hand information on maintenance data, such as the work of all levels of parameters. Oil road maintenance is also true, must be based on the characteristics of oil and hydraulic solenoid valve calibration and maintenance. Have the opportunity to often disassemble, clean, check, install the solenoid valve. These treatments can cause a lot of trouble, but they are crucial. Maintenance work must be mastered and sorted out in line with the principle of logical system failure repair methods and judgments program chart, combined with the actual work weekdays maintenance, collecting injection molding machine-related information, such as failure to deal with the method of step by step inspection, simulation test, Voltage test method, on-off test method, circuit board replacement method and other methods. After the repair, to re-adjust the work point, re-calibration, with a load test, the equipment to work in the data listed in the manual parameters within the parameters.