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Maintenance and upkeep of fully electric injection molding machines
Time:2026-04-20
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The fully electric injection molding machine adopts servo motor direct drive instead of traditional hydraulic system, which has advantages such as energy saving, high precision, and low noise. However, its maintenance still needs to be systematic and periodic to ensure long-term stable operation.
1、 Key points of daily maintenance
1. Pre startup inspection:
Check if the safety door, protective cover, and mold installation are normal.
Confirm that the set temperature meets the requirements of the raw materials used.
Check if there are any abnormal sounds or vibrations in the servo motor.
Ensure that the emergency stop button is functioning properly.
2. Monitoring during operation
Listen: Pay attention to whether there is any abnormal noise from the motor, synchronous belt, screw, etc.
Touch: perceive whether the servo motor, electrical box, and transmission components are overheated or vibrating abnormally.
Observe whether the movement is smooth, whether there is any stuttering or shaking.
Real time monitoring of the temperature of the material barrel, mold, and servo system to ensure that the temperature difference is within the process range (such as temperature difference between each area of the material barrel ≤ ± 2 ℃).
3. Clean after shutdown
Clean up residual plastic and flying edge waste on the surface of the mold.
Wipe the mold cavity and guide column with a soft cloth and specialized solvent.
Vacuum clean the workbench and surrounding dust to prevent particles from affecting accuracy
2、 Regular maintenance plan
1. Daily
Check the condition of the lubricating grease (some parts need to be manually refilled); Confirm that there is no leakage in the cooling water circuit.
2. Monthly
Check for voltage fluctuations in the power supply (≤± 10V); Check if the locking/injection moving parts lubricating grease has dried up; Clean the dust filter screen of the control cabinet.
3. Every 3 months
Check the lubrication effect of the ball screw, remove dirt and inspect for scratches;
Check the lubrication of the connecting rod/connecting rod bushing;
Clean the dust accumulation on the servo motor and cooling fan;
When using the same mold for a long time, adjust the mold thickness and add gear grease.
4. Every 6 months
Check the tightness, wear or damage of the synchronous belt (locking, ejecting, injecting, pre molding, moving);
Adjust the offset of the locking steel strip;
Check for oil, water, and debris inside the control cabinet, and test the insulation of the power circuit;
Tighten the connecting screws between the front plate of the shooting platform and the cylinder seat.
5. Every year
Measure and adjust the overall levelness of the machine;
Fully tighten all connecting screws;
Check whether the cables and lubrication pipes are worn;
Check if the movable parts move smoothly
Note: Some high-end models are equipped with intelligent diagnostic systems that can automatically generate maintenance prompts. It is recommended to adjust flexibly based on the actual alarm information of the equipment.
3、 Key precautions
1. It is forbidden to idle the high-speed screw: Rotating the screw at high speed without raw materials can easily cause the screw to "bite" with the check ring.
2. Avoid using defective molds: The parallelism error of the mold should be ≤ 0.02mm/m, otherwise it will accelerate the wear of the elbow joint rod and template.
3. Strictly prevent metal foreign objects from mixing into raw materials: especially when using recycled materials, iron filings, screws, etc. must be screened out to prevent damage to screws and barrels.
4. Keep the environment clean: The electrical box and fan vents must not be obstructed by debris to ensure good heat dissipation. Electrical maintenance must be carried out by professional personnel. Operations inside the control box must be powered off and carried out by personnel with electrical qualifications.
4、 Intelligent maintenance trend
Modern fully electric injection molding machines generally have:
AI fault prediction: By monitoring real-time parameters such as vibration, temperature, and current through sensors, potential faults can be alerted in advance.
Modular design: Key components (such as injection units) support quick disassembly and assembly, reducing downtime.
Digitization of maintenance records: Record each maintenance data for trend analysis and spare parts replacement planning.
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