Maintenance and handling of common faults in injection molding machines

Maintenance and dealing with of not unusualplace faults in injection molding machines
Before repairing the injection molding system, it's miles important to first have a whole and clean know-how of the system's operating principles, inclusive of electric principles, hydraulic principles, and mechanical principles. Secondly, it's miles important to observe the 4 steps of seeing a medical doctor in historic times, particularly looking, smelling, asking, and cutting. Persist in waking up your mind, do not be impatient, first pick out which thing of the hassle belongs to the electric, hydraulic, or mechanical aspects, and actually pick out it via way of means of following the subsequent steps:
The following are not unusualplace issues and answers for reference
1, The oil pump motor does now no longer begin
1. If the motor can not rotate and emits an bizarre sound, right now flip off the emergency prevent button, test if the fuse is blown or unfastened, after which test if the three-section strength deliver of the motor is normal
2. Press the motor begin button, however there may be no opportunity of the motor creating a sound. The button transfer, AC contactor twine can be unfastened, or the thermal relay can be activated
3. The oil pump is caught, inflicting the motor to now no longer rotate (there may be a few noise from the motor at this time)
4. The motor is burnt out, restore in keeping with the unique specs and discover the cause (inclusive of section failure, overload, bad AC relay contacts, unfastened motor twine contacts, or choppy and risky three-section strength deliver voltage)
2, The electric powered motor can rotate, however it does now no longer generate strain or the big pump does now no longer generate strain
1. The electromagnetic coil of the electromagnetic overflow valve or strain proportional valve of the small pump isn't suction or the inner valve middle is caught via way of means of debris. Remove and smooth it, and test whether or not the electromagnetic coil is burned out, whether or not the wiring is unfastened, or if there may be bad contact
2. Oil pump damaged, repaired or replaced
3. The oil stage is just too low, forming a pump suction void
4. Can the oil clear out out be blocked
5. Can the motor opposite and extrade phases
6. There is air withinside the oil pump, please launch the air first
7. The most important valve middle of the manipulate pump overflow valve is caught, do away with the overflow valve for cleaning
3, Incoherent model
1. The wiring of the protection door tour transfer is unfastened or damaged, and the protection door tour isn't pressed down. Check SQ1, SQ2, and SQ3
2. SQ4 tour transfer closed
3. Lock mode solenoid valve caught or solenoid valve socket unfastened
4. The transfer for the backward motion of the ejector pin isn't closed
5. System strain now no longer present: restore in keeping with item (2)
4, No injection or sluggish speed
1. Low injection strain, too sluggish speed: Increase the injection strain, growth the injection speed
2. Plastic heating temperature bottom: growth the temperature
3. Nozzle blockage, do away with for heating and cleaning
4. The injection time is just too short
5. Injection solenoid valve caught
6. The injection solenoid valve have to now no longer be electrified. Check the electric reasons
5, Not pre molded or pre molded too slowly
1. The pre molding termination tour transfer has been closed, and the collision block of the tour transfer has been opened,
2. One manner throttle valve tightly closed
3. If the cloth temperature is just too low, growth the cloth temperature
4. Pre molded solenoid valve caught, do away with for cleaning
5. The pre molding strain is just too low, growth the pre molding strain
6. Foreign items coming into the screw are jamming the screw. Disassemble the screw for cleaning, and smooth the cloth barrel
7. Hydraulic motor faulty, bearing caught
6, During pre molding, the screw rotates however does now no longer feed
1. High returned strain
2. Lack of cooling water on the feeding port results in the bridging of substances withinside the feeding port; Adjust the water quantity and do away with the plastic blocks of the adhesive structure
3. Shortage of substances, including substances
4. Screw breakage
5. Setting the returned strain too excessive or too low
7, Unable to modify or tough to modify the mildew
1. The gadget strain has been adjusted to a low stage
2. The pull rod nut of the rear template is caught because of impurities or loss of clean oil and grease; Clean the pull rod nuts and restore them. When putting in the device, be aware of making sure that the axial clearance of the 4 nuts is different, after which upload clean grease
3. Mold regulating solenoid valve caught or socket unfastened: inspection and restore
4. Damaged hydraulic motor for mildew adjustment, repaired or replaced
8, Hydraulic oil temperature too excessive
1. Excessive oil pump strain: Stop adjusting the operating strain accurately in keeping with the plastic molding process
2. Lack of oil withinside the gasoline tank: upload sufficient hydraulic oil
3. The oil cooler has been used for too long, accrued scale, and has bad cooling effect. Cleaning the cooler
4. Insufficient cooling water glide charge or inadequate cooling water temperature
9, Semi computerized operation failure
The semi-computerized operation of this system is completed via way of means of establishing the protection door, ultimate the tour transfer, sending a sign to begin the semi-computerized motion of the system, then ultimate the mildew. When it touches the SQ4 tour transfer, the mildew is closed, and injection starts offevolved on the equal time. The injection time relay begins offevolved timing. When the injection time is up, pre molding starts offevolved. When it touches the pre molding finished tour transfer, anti glide starts offevolved. When it touches the anti glide tour transfer, the cooling time relay begins offevolved timing. When the time is up, the mildew is opened, and while it touches the mildew establishing give up tour transfer, the ejection motion is performed. When it touches the ejection give up tour transfer, the ejection motion is performed. W

Maintenance and dealing with of not unusualplace faults in injection molding machines
Before repairing the injection molding system, it's miles important to first have a whole and clean know-how of the system's operating principles, inclusive of electric principles, hydraulic principles, and mechanical principles. Secondly, it's miles important to observe the 4 steps of seeing a medical doctor in historic times, particularly looking, smelling, asking, and cutting. Persist in waking up your mind, do not be impatient, first pick out which thing of the hassle belongs to the electric, hydraulic, or mechanical aspects, and actually pick out it via way of means of following the subsequent steps:
The following are not unusualplace issues and answers for reference
1, The oil pump motor does now no longer begin
1. If the motor can not rotate and emits an bizarre sound, right now flip off the emergency prevent button, test if the fuse is blown or unfastened, after which test if the three-section strength deliver of the motor is normal
2. Press the motor begin button, however there may be no opportunity of the motor creating a sound. The button transfer, AC contactor twine can be unfastened, or the thermal relay can be activated
3. The oil pump is caught, inflicting the motor to now no longer rotate (there may be a few noise from the motor at this time)
4. The motor is burnt out, restore in keeping with the unique specs and discover the cause (inclusive of section failure, overload, bad AC relay contacts, unfastened motor twine contacts, or choppy and risky three-section strength deliver voltage)
2, The electric powered motor can rotate, however it does now no longer generate strain or the big pump does now no longer generate strain
1. The electromagnetic coil of the electromagnetic overflow valve or strain proportional valve of the small pump isn't suction or the inner valve middle is caught via way of means of debris. Remove and smooth it, and test whether or not the electromagnetic coil is burned out, whether or not the wiring is unfastened, or if there may be bad contact
2. Oil pump damaged, repaired or replaced
3. The oil stage is just too low, forming a pump suction void
4. Can the oil clear out out be blocked
5. Can the motor opposite and extrade phases
6. There is air withinside the oil pump, please launch the air first
7. The most important valve middle of the manipulate pump overflow valve is caught, do away with the overflow valve for cleaning
3, Incoherent model
1. The wiring of the protection door tour transfer is unfastened or damaged, and the protection door tour isn't pressed down. Check SQ1, SQ2, and SQ3
2. SQ4 tour transfer closed
3. Lock mode solenoid valve caught or solenoid valve socket unfastened
4. The transfer for the backward motion of the ejector pin isn't closed
5. System strain now no longer present: restore in keeping with item (2)
4, No injection or sluggish speed
1. Low injection strain, too sluggish speed: Increase the injection strain, growth the injection speed
2. Plastic heating temperature bottom: growth the temperature
3. Nozzle blockage, do away with for heating and cleaning
4. The injection time is just too short
5. Injection solenoid valve caught
6. The injection solenoid valve have to now no longer be electrified. Check the electric reasons
5, Not pre molded or pre molded too slowly
1. The pre molding termination tour transfer has been closed, and the collision block of the tour transfer has been opened,
2. One manner throttle valve tightly closed
3. If the cloth temperature is just too low, growth the cloth temperature
4. Pre molded solenoid valve caught, do away with for cleaning
5. The pre molding strain is just too low, growth the pre molding strain
6. Foreign items coming into the screw are jamming the screw. Disassemble the screw for cleaning, and smooth the cloth barrel
7. Hydraulic motor faulty, bearing caught
6, During pre molding, the screw rotates however does now no longer feed
1. High returned strain
2. Lack of cooling water on the feeding port results in the bridging of substances withinside the feeding port; Adjust the water quantity and do away with the plastic blocks of the adhesive structure
3. Shortage of substances, including substances
4. Screw breakage
5. Setting the returned strain too excessive or too low
7, Unable to modify or tough to modify the mildew
1. The gadget strain has been adjusted to a low stage
2. The pull rod nut of the rear template is caught because of impurities or loss of clean oil and grease; Clean the pull rod nuts and restore them. When putting in the device, be aware of making sure that the axial clearance of the 4 nuts is different, after which upload clean grease
3. Mold regulating solenoid valve caught or socket unfastened: inspection and restore
4. Damaged hydraulic motor for mildew adjustment, repaired or replaced
8, Hydraulic oil temperature too excessive
1. Excessive oil pump strain: Stop adjusting the operating strain accurately in keeping with the plastic molding process
2. Lack of oil withinside the gasoline tank: upload sufficient hydraulic oil
3. The oil cooler has been used for too long, accrued scale, and has bad cooling effect. Cleaning the cooler
4. Insufficient cooling water glide charge or inadequate cooling water temperature
9, Semi computerized operation failure
The semi-computerized operation of this system is completed via way of means of establishing the protection door, ultimate the tour transfer, sending a sign to begin the semi-computerized motion of the system, then ultimate the mildew. When it touches the SQ4 tour transfer, the mildew is closed, and injection starts offevolved on the equal time. The injection time relay begins offevolved timing. When the injection time is up, pre molding starts offevolved. When it touches the pre molding finished tour transfer, anti glide starts offevolved. When it touches the anti glide tour transfer, the cooling time relay begins offevolved timing. When the time is up, the mildew is opened, and while it touches the mildew establishing give up tour transfer, the ejection motion is performed. When it touches the ejection give up tour transfer, the ejection motion is performed.