What are the key points in repairing an injection molding machine?

Is it useful to put a set of books up, according to what you said above, it is not half a day and can not find a reason, if you want to say, or to do it for a period of time, first understand the machinery, besides, learning to repair is not a day or two can be learned, only to do it will be. As for the main point, the main point is to be able to distinguish the classification of faults, which are generally mechanical, electrical, and oil circuits, and there are other processes or something, and it is unclear to say that it is not clear, if there is an actual problem, it will be remembered after doing it.

Ensure the quality of maintenance, choose appropriate materials and methods to solve the problem: if a part fails, the wire connection may be unstable; The large injection molding machine is large in size, and the injection molding workshop does not have a constant temperature working environment, which is easy to cause the failure of the injection molding machine; The general production and topping mold will be ejected after cooling with thermoplastic, pay attention not to damage the surface of the mold; The cleanliness of the mold cavity for imported molds is selected as abrasives, and polishing materials are not allowed to be used on the textured surface.

I have helped you find the results; Injection molding machine maintenance Injection molding machine is a complex mechanical equipment, which will produce various faults and problems after long-term use, and needs to be maintained and maintained regularly. Here are some methods and steps for injection molding machine maintenance:1

Regularly inspect all parts of the injection molding machine, including hydraulic part, electrical part, mechanical part, etc., and deal with abnormal situations in time. 2.Wash all parts of the injection molding machine frequently to keep the machine clean and hygienic.

3.Check whether the mold of the injection molding machine is damaged or worn, and replace or repair it in time. 4.

Check the lubrication system of the injection molding machine to ensure that the lubricating oil in each part is sufficient, and replace the aging or polluted lubricating oil in time. 5.When the injection molding machine fails, the fault should be eliminated in time, and the correct maintenance methods and tools should be adopted to avoid secondary damage and safety accidents.

It should be noted that injection molding machine maintenance requires professional technology and experience, and it is recommended to find a professional injection molding machine maintenance company or technician for repair and maintenance. When choosing a maintenance service provider, the puncher needs to consider factors such as the company's qualification, reputation and service quality to ensure the quality and safety of the maintenance.

Common faults and solutions of injection molding machines: 1. The oil pump motor does not start 1. The motor does not rotate, and at the same time makes an abnormal sound, immediately close the emergency stop button, check whether the fuse is blown or loose, and then check whether the three-phase power supply of the motor is normal; 2. Press the motor start button, the motor sound is not possible to button the switch, the line of the AC contactor is loose, or the thermal relay is moving; 3. The motor does not rotate due to the oil pump being stuck (at this time, the motor has some sounds); 4. The motor burns out, repair it according to the original specifications and find the cause (such as early phase break, overload, bad AC relay contact, loose contact of the motor line, or unbalanced and unstable three-phase power supply voltage) Second, the motor can rotate, but it does not have pressure or the large pump does not pressurize 1. The electromagnetic coil of the small pump electromagnetic relief valve or the compression code Jianzhaoli proportional valve does not suck or the internal valve core is stuck by debris, remove and clean, and check whether the solenoid coil is burned, whether the wiring is loose, or the contact is poor; 2. If the oil pump is damaged, repair or replace the oil pump; 3. The oil surface is too bottom, causing the pump to be hollowed out; 4. Whether the oil filter screen is blocked due to late rent; 5. Whether the motor is reversed and commuted; 6. If there is air in the oil pump, it should be deflated first; 7. The main valve core that controls the overflow valve of the large pump is stuck, and the overflow valve is removed for cleaning. Hello kiss The above is the operation steps sorted out for you I hope mine is helpful to you, yo kiss <>

First, the oil pump motor and oil pump start, but no pressure.

1. The wiring of the proportional valve on the oil pump is loose or the coil is burned - check whether the proportional pressure valve is energized.

Buy jadeite first to see here, first-hand supply, raw stone cutting, manufacturers direct supply. Ad.

2. Impurities block the oil port of the proportional pressure valve on the oil pump - remove the proportional pressure valve to remove impurities.

3. The pressure oil is unclean, and debris accumulates on the surface of the oil filter, which prevents the pressure oil from entering the pump - clean the oil filter and replace the pressure.

4. Oil leakage inside the oil pump, due to damage caused by too long use, internal wear and tear or unclean pressure oil - repair or replace the oil pump.

5. Oil leakage from oil pumps, oil pipes and joints - eliminate leakage places.

6. The oil is stuck - check whether the oil valve core is active normally.

Second, the temperature of the melt cartridge cannot be controlled.

1. The temperature cannot be controlled, check whether the contacts of the electric thermal contactor are sticky, and whether the wires of the thermocouple are loose or damaged.

2. If the temperature cannot rise, check whether the electric heating air switch in the electric box is adjusted, whether the contactor and relay are engaged, whether there is voltage, whether the fuse is burned out, and whether the heating ring is burned out.

3. Whether the temperature gauge is damaged.

Third, no clamping.

1. Whether the front opening safety door has been closed, whether the limiter of the safety door has been crimped and loosened for the safety door, and whether the wiring is loose or damaged.

2. The coil of the clamping electromagnetic system may have moved to the valve and stuck with the valve core - clean or replace the clamping control valve.

3. The directional valve may not be reset - clean the directional valve.

4. The thimble cannot be withdrawn back into place - check whether the thimble action is normal.

5. Check whether the origin of the computer controller's mold locking and mold opening electronic ruler has been changed, and whether the mold locking position has been terminated.

6. Check whether the pressure gauge is moving.

7. Press the mode-locking button to see if the display screen displays the mode-locking signal or other signals and alarms.

8. Check whether the position, speed and pressure of the clamping are adjusted normally.

9. Check whether the piston rod of the clamping is broken.

Fourth, do not shoot glue.

1. The coil of the injection electromagnetic system may have been burned, or there may be foreign objects entering the direction valve, and the valve core is stuck and moving-clean or replace the injection valve.

2. The pressure is too low - turn up the injection pressure.

3. The temperature of the injection molding is too low - adjust the temperature gauge to raise the temperature to the required point, if the temperature gauge is still not able to raise the temperature, check whether the heating torch and fuse are burned or loose, if it has been broken, replace it in time.

4. The wiring of the injection combination valve opening system is loose or the contact is poor - connect the wire head of the combination switch properly.

Fifth, the sol screw rotates, but the rubber does not enter the barrel.

1. The sol retreat pressure is too high, and the back pressure valve is damaged or improperly adjusted - adjust or replace the sol back pressure valve. 2. The water transportation is insufficient, so that the temperature is too high, so that the rubber particles are blocked when entering the screw - adjust the water transportation volume and take out the bonded glue block. See if the water flow circle is clogged or the water is not cooled.

3. There is no material in the bucket - feeding.

4. Whether the temperature of the melt cartridge is too high.

Sixth, the shooting table does not move.

1. The moving limit travel switch of the shooting table is adjusted and pressed by the collision block - adjusted.

2. The coil of the mobile solenoid valve of the injection table may have been burned or there are foreign objects.

(1): No clamping:

Solution: 1): Check the travel switch in front of the safety door and fix it.

2): Check the 24V5A power supply in the electrical box, replace the fuse and power box.

3): Check whether the spool is stuck and clean the spool.

4): Check whether the IO board has output and whether the solenoid valve is live.

5): Check whether the hydraulic safety switch is pressed and whether the mechanical lock rod baffle is opened.

2): Mold opening and closing machine ringing:

Solution: 1): Check whether the lubricating oil pipe is disconnected, if so, the oil pipe must be reconnected.

2): The amount of lubricating oil is small, increase the amount of lubricating oil, it is recommended to make 50 molds of oil once or manually add enough lubricating oil.

3): The clamping force is large, check whether the mold needs a large clamping force, and adjust the clamping force.

4): The current of the amplifier plate is disturbed, check whether the current parameters meet the acceptance criteria, and readjust the current value.

5): The parallelism is out of tolerance, and the parallelism of the first two plates is checked with a dial gauge whether it is greater than the acceptance standard; Modulation parallelism.

Three): Wait a few seconds before opening the mold:

Solution: 1): If the starting speed is slow, check whether the screw damping is too large, and adjust the screw damping hole.

2): The middle hole of the damping screw is too large, check whether the damping of the Y-hole screw is too large, and replace the damping nail with a thin center hole.

4): Unlocking and crawling:

Treatment method: 1): The two-plate guide rail and the corinning column are worn out, check the two-plate guide rail and the corin column, replace the two-plate copper sleeve and the corin column, and fill the lubricating oil.

2): improper adjustment of the clamping speed and pressure, set the flow rate 20, the pressure is 99, the second plate of the clamping mold should not crawl, adjust the flow proportional valve hole, or the pilot valve hole, adjust the linear current value of the proportional valve.

Five): the mold is not open:

Treatment method: 1): Increase the clamping speed, the pressure flow is too small and not adjusted, check the unlocking speed, whether the pressure is appropriate, and increase the unlocking pressure and speed.

2): The zero position of the clamping electronic ruler is changed, check whether the clamping and straightening machine is terminated in the zero position after twisting, and readjust the zero position of the electronic ruler.

3): Check whether it is reversed.

1. Unstable or unqualified product production In a stable production cycle, the unstable quality of finished products may be caused by wear and tear of mechanical parts or improper adjustment. 1. Wear of screws, check rings and barrels. 2. The sealing ring in the injection cylinder is damaged and causes internal leakage.

3. The temperature control of the heating cylinder is unstable. 4. The pressure and speed control part is abnormal. Two.