Introduction to the basic method of repairing plas

2022-08-12
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Introduction to the basic methods of repairing plastic injection molding machines

the core of the maintenance of injection molding machines is the judgment of faults. On the whole, the orders of plastic machinery in the United States in 2013 increased by 8% compared with last year And fault handling. It involves a wide range of knowledge, a large degree of complexity, and has a certain depth (such as the level of comprehensive professional knowledge). It is necessary to have basic knowledge of mechanical equipment maintenance, hydraulic maintenance and electrical maintenance. In fact, the maintenance work of the injection molding machine is difficult, but it is also a process of continuous learning and enterprising. As long as we master the basic working principle and basic working methods of the injection molding machine, we can explore a set of maintenance procedures to ensure the normal operation of the injection molding machine, no matter how various models are

maintenance workers must first understand and master the contents of the operation manual of the injection molding machine, be 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, and understand and master the inspection, maintenance and use methods of electrical components and hydraulic components. Know the normal working state and abnormal working state to avoid wrong judgment and wrong disassembly when free

the maintenance work must understand the operation method of the equipment and have some basic knowledge of injection molding, and be able to use the injection molding machine correctly. If you don't know how to operate the injection molding machine, the maintenance work is very difficult, and the judgment of failure may also be unreliable. The circuit board and electrical components in the injection molding machine are affected by high temperature, environment, time and other factors for a long time, the working point of the components 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 the maintenance work. It is very important to understand the working procedure of the injection molding machine and debug the electronic circuit and hydraulic oil circuit of the injection molding machine

in order to make the maintenance work accurate, reliable and timely, it is necessary to study and master the contents in the operating instructions of various types of injection molding machines. In the general maintenance process, the maintenance idea is usually circuit oil circuit mechanical component action. The adjustment work is carried out in turn. If the mechanical action and mode locking 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 unified adjustment, but the relationship between the three is interdependent and mutually controlled. Correct use of instruments and meters, adjustment and calibration of detection circuits, maintenance of oil circuits, and commissioning of the position and action of mechanical parts are important means to judge faults. Generally, the injection molding machine manufacturer only gives the electrical block diagram of the equipment, the block diagram of the oil circuit and the main parts of the machine, which is not enough for the maintenance work. We must pay attention to the daily maintenance of proportional valves. In the basic work of traditional industrial hydraulic valves, we should collect and sort out relevant data in all aspects. Such as electrical, electronic, mechanical spare parts, oil circuit, electromagnetic valve body and other information. For example, in the electrical field, if there is an opportunity, it is necessary to map the circuit schematic diagram, the schematic diagram of the electronic board and the actual wiring diagram, and measure the relevant data such as the devices corresponding to the wiring terminals, so as to provide accurate detection points for fault judgment and analysis in the maintenance technical indicators. Measure the specific parameters of its detection point. When necessary, it is also necessary to make its own power supply, analog input and output signals, and carry out analog testing or calibration, so as to master and obtain first-hand maintenance information and data, such as parameters of working points at all levels

the same is true for oil maintenance at the government level. It must be adjusted and maintained comprehensively according to the characteristics of oil circuit and oil pressure solenoid valve. Always disassemble, clean, inspect and install the solenoid valve when possible. These treatments will cause a lot of trouble, but they are crucial

the maintenance work must master and sort out the maintenance methods and judgment procedure diagrams that conform to the principle and logic system fault. In combination with the actual daily maintenance work, collect the relevant data of the injection molding machine, such as the fault treatment. The methods include step-by-step inspection method, analog inspection method, voltage test method, on-off test method, circuit board replacement method and other methods. After the repair, the working point shall be readjusted, readjusted, and tested with load to make the equipment work within the parameter range of the data listed in the operation manual

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