injection machine maintenance

The core of injection molding machine maintenance is fault judgment and fault treatment. It involves a wide range of knowledge, a large degree of complexity and a certain depth (such as the level of comprehensive professional knowledge). It is necessary to have not only the basic knowledge of mechanical equipment maintenance, but also the basic knowledge of hydraulic maintenance and electrical maintenance.

In fact, the maintenance 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, regardless of various models.

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, so as to avoid false judgment and false disassembly.

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 fault judgment may not be reliable. 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 belongs to 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 achieve accurate, reliable and timely maintenance, it is necessary to study and master the contents in the operation manual 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 insufficient, 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 controlled by each other. Correct use of instruments and meters, adjustment of detection circuit, maintenance of oil circuit and commissioning of mechanical part position and action are important means to judge faults.

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 the maintenance work. Attention must be paid to collecting and sorting out relevant data in all aspects during daily maintenance. Such as electrical, electronic, mechanical spare parts, oil circuit, electromagnetic valve body, etc.

For example, in the electrical aspect, 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 maintenance.

Measure the specific parameters of its detection points. When necessary, it is also necessary to make its own power supply, analog input and output signals, conduct analog test or adjustment, so as to master and obtain first-hand maintenance data, such as parameters of working points at all levels.

The same is true for oil circuit maintenance. Comprehensive adjustment and maintenance must be carried out according to the characteristics of oil circuit and oil pressure solenoid valve. Remove, clean, inspect and install the solenoid valve frequently when possible. These treatments can cause a lot of trouble, but they are crucial.

The maintenance work must master and sort out the fault maintenance methods and judgment procedure diagrams in accordance with the principle and logic system. In combination with the actual daily maintenance work, collect relevant data of the injection molding machine, such as 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, the adjustment shall be carried out again, and the load test shall be carried out to make the equipment work within the parameter range of the data listed in the operation manual