The core of injection molding machine maintenance work is the fault judgment and fault handling. It involves a wide range of knowledge, a large degree of complexity, and a certain depth (such as comprehensive professional knowledge level). Not only basic knowledge of mechanical equipment maintenance, but also basic knowledge of hydraulic maintenance, and basic knowledge of electrical maintenance. In fact, the maintenance work of the injection molding machine is difficult, but it is a process of continuous learning and progress. As long as you master the basic working principle of the injection molding machine and the basic working method, regardless of the various models, you can explore a set of maintenance Working procedures come to ensure the normal operation of the injection molding machine.

Maintenance workers must first understand and master the contents of the operating instructions of the injection molding machine, familiar with and master the mechanical parts, circuits and oil circuits of the injection molding machine, understand the working process of the machinery, circuits and oil circuits of the injection molding machine during normal operation, understand and Master the inspection and maintenance methods of electrical components and hydraulic components. Clear the normal working state and abnormal working state to avoid time-consuming misjudgment and wrong disassembly.

The maintenance work must understand the operation method of the equipment and have some basic knowledge of injection molding, and will use the injection molding machine correctly. If you do not know how to operate the injection molding machine, the maintenance work is very difficult, and the fault may be unreliable. 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 working point of the device is offset, and the aging degree of the components is within the normal range. Therefore, debugging the injection molding machine is also one of the essential basic skills in maintenance work. Understanding the working procedures of the injection molding machine, debugging the injection molding machine electronic circuit, hydraulic oil circuit is a very important link.

To maintain accurate, reliable and timely maintenance work, we must study and master the contents in the instruction manuals of various types of injection molding machines. In the general maintenance process, the maintenance idea is usually the action of the circuit-oil circuit-mechanical parts. The adjustment work is carried out in reverse. If the mechanical action and clamping pressure are missing, you can find the oil circuit and circuit. If the circuit output is normal, adjust the oil circuit valve. If the oil circuit works normally, adjust the circuit electronic board. Of course, the final adjustment, but the relationship between the three depends on each other and controls each other. Correct use of instrumentation, adjustment of the detection circuit, maintenance of the oil circuit, and adjustment of the position and movement of the mechanical parts are important means of judging the fault. General injection molding machine manufacturers only give the electrical block diagram of the equipment, the block diagram of the oil circuit and the main parts of the machinery, which is not enough for maintenance work. Attention must be paid to the collection and arrangement of relevant data in all aspects during routine maintenance work. Such as electrical, electronic, mechanical spare parts, oil circuit, solenoid valve body and other aspects. For example, if there is an opportunity in the electrical field, it is necessary to survey and map the circuit schematic diagram, the schematic diagram of the electronic board and the actual wiring diagram, and the relevant materials such as the devices corresponding to the terminal blocks, so that the fault diagnosis and analysis can be provided accurately during maintenance Where the detection point is going. Measure the specific parameters of its detection point. When necessary, you must also make your own power supply, simulate input and output signals, conduct simulation tests or adjustments to master and obtain first-hand maintenance data, such as the parameters of working points at all levels.

The same is true for oil circuit maintenance, which must be comprehensively adjusted and maintained according to the characteristics of the oil circuit and hydraulic solenoid valve. Have the opportunity to frequently disassemble, clean, inspect, and install solenoid valves. These treatments will cause a lot of trouble, but they are crucial.

The maintenance work must master and sort out the fault maintenance methods and judgment program diagrams that are in accordance with the principles and logical systems. In combination with the actual maintenance work on weekdays, collect relevant information about the injection molding machine, such as troubleshooting, the methods include stepwise inspection method, simulation inspection method, Various methods such as voltage test method, continuity test method, circuit board replacement method, etc. After the repair, the working point must be readjusted, readjusted, and the load test carried out to make the equipment work within the parameter range of the data listed in the operation manual.