Maintenance work requires understanding of equipment operation methods and having some basic knowledge of injection molding, as well as being able to use injection molding machines correctly. If you don't know how to operate the injection molding machine, maintenance work is very difficult, and diagnosing faults may also be unreliable. The circuit board and electrical components in the injection molding machine are subject to long-term effects such as high temperature, environment, and time, resulting in device operating point deviation and aging degree, which are within the normal range.So, debugging injection molding machines is also one of the essential basic skills in maintenance work. Understanding the working procedures of injection molding machines and debugging their electronic circuits and hydraulic oil circuits is a crucial step. To achieve accurate, reliable, and timely maintenance work, it is necessary to study and master the contents of the user manuals of various types of injection molding machines. In the general maintenance process, the maintenance idea is usually the circuit oil circuit mechanical component action. And the calibration work is carried out in reverse, such as mechanical action and insufficient 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 is working properly, calibrate the circuit electronic board. Of course, in the end, the three are interdependent and mutually controlled. Proper use of instruments, calibration of detection circuits, maintenance of oil circuits, and adjustment of the position and action of mechanical parts are important means of diagnosing faults.Generally, injection molding machine manufacturers only provide the electrical block diagram of the equipment, the block diagram of the oil circuit, and the main mechanical parts, which is not enough for maintenance work. Attention must be paid to collecting and organizing relevant information from various aspects in daily maintenance work.Information on electrical, electronic, mechanical spare parts, oil circuits, solenoid valve bodies, etc. For example, in the electrical field, if there is an opportunity, it is necessary to survey the circuit schematic, the schematic and actual wiring diagram of the electronic board, and measure the relevant information such as the devices corresponding to the wiring terminals, in order to provide accurate detection points for fault diagnosis and analysis during maintenance. Measure the specific parameters of its detection point.When necessary, one also needs to create their own power supply, simulate input and output signals, conduct simulation testing or calibration, in order to grasp and obtain first-hand maintenance data, such as parameters of various working points. The same applies to oil circuit maintenance, which requires comprehensive calibration and maintenance based on the characteristics of the oil circuit and oil pressure solenoid valve. It is important to regularly disassemble, clean, inspect, and install solenoid valves whenever possible. These treatments can cause a lot of trouble, but they are crucial. Maintenance work must master and organize fault repair methods and judgment program diagrams that conform to principles and logical systems. In combination with daily maintenance work, relevant information about injection molding machines should be collected. If faults are dealt with, various methods such as step-by-step inspection, simulation inspection, voltage testing, on-off testing, circuit board replacement, etc. should be used.
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