1. Plastic pipe production line failure: rough outer surface of the plastic pipe
Adjust the process temperature; reduce the cooling water temperature, PE pipe cooling water temperature for the best 20 ~ 25 ℃; check the water circuit, whether there is blockage or insufficient water pressure phenomenon; check the barrel, the head of the machine and so on the heating ring whether there is damage; adjusting the diameter set of the inlet flow; check the performance of raw materials and batch size; check the core mold temperature, if higher than the mouth mold section Temperature, if higher than the mouth mold section temperature, lower the core temperature; clean up the mold of the aggregate;
2. Plastic pipe production line failure: the outer surface of the plastic pipe groove marks
Adjust the calibrating set of the water pressure, the amount of water required to be balanced; adjust the angle of the nozzle in the vacuum sizing box, so that the pipe cooled uniformly; check the mouth of the mold, calibrating set, cutter, and other hardware whether there are sundries, burrs, and so on;
3. Plastic pipe production line failure: grooves appear on the inner surface
Check whether the inner pipe water, such as water into the pipe embryo just out of the mold pinch, so that the inner cavity closed; reduce the internal temperature of the mold; clean up and polish the mold;
4. Plastic pipe production line failure: the pipe inside the jiggle ring
Adjust the calibrating set of water, so that the water is even Plastic pipe production line failure: no vacuum
Check whether the vacuum pump inlet is clogged, such as clogging, dredging; check whether the vacuum pump is working properly; check whether the vacuum pipeline is leaking; check whether the mandrel mold presses the water; check whether the mandrel mold presses the water; check whether the mandrel mold presses the water. Whether air leakage; check whether the hole in the middle of the mandrel compression screw is blocked, such as blocking, use fine wire to dredge;
6. Plastic pipe production line failure: pipe roundness size is too poor:
Adjusting the size of the vacuum degree can be changed to change the size of the outer garden; adjusting the hauling speed can be changed to change the size of the outer garden; correcting the size of the inner hole in the calibrated set;
7. Roundness is too poor
Adjust the vacuum sizing machine, spray box nozzle angle, so that the pipe cooling uniformity; check the vacuum sizing machine, spray box water level height, water pressure gauge pressure, so that the spray volume is large and powerful; check the vacuum sizing machine, spray box water temperature, if > 35 ℃, the need to configure the chilled water system or increase the spray cooler box; check the water circuit, clean the filters; adjust the process; check and correct the calibrated set of inner hole garden; adjust the pipe Sets the inner hole of the garden; adjust the pipe guide clamping device, in order to correct the oval degree of the pipe;
8. Plastic pipe production line failure: pipe wall thickness is not uniform
Adjust the wall thickness in the mold; adjust the angle of the nozzle in the vacuum shaping machine and spray box, so that the pipe cooling uniformity; adjust the calibrator set of water, so that the water uniformity; dismantle the mold, check the mold whether the internal screws are loose and retighten;
Tighten the mold;
Tighten the mold;
Tighten the mold. Tighten;
9. Plastic pipe production line failure: plasticizing temperature is too high
Adjust the process; adjust the heating temperature of the mold core, and ventilation cooling of the mold interior; screw shear heat is too high, replace the screw;
10. Plastic pipe production line failure: cutting counting inaccuracy
Check whether the counting wheel is pressed tightly; check the counting wheel is not swinging and tighten the counting wheel holder. And tighten the counting wheel frame fixing bolts; check whether the cutting machine travel switch is damaged; check whether the rotary encoder is damaged; whether the rotary encoder wiring is de-welded (whether the aviation plug seat contact is good); the single machine shell (PE terminal) should be individually led to the grounding wire to a total grounding point of reliable grounding, and the grounding should be in line with the requirements of the electrical grounding grounding stakes, do not allow the single machine shell (PE terminal) in series after grounding, otherwise it will introduce interference pulses. Grounding, otherwise the introduction of interference pulses, caused by the cutting length is not allowed;
11. Plastic pipe production line failure: *** Extrusion marking strip problem
** Extrusion marking strip diffusion: generally due to the user's use of *** Extrusion material selection is not properly caused by the use of PE and other special materials should be used to reduce the temperature of the extrusion section, if necessary;
** Extrusion marking strip can not be extruded: Will be the main extruder shutdown, the first open *** extruder, open *** extruder 10 minutes or so and then open the host;
** extrusion marking strip is too thin or too wide: generally due to *** extruder extrusion and pipe hauling speed mismatch caused by the *** extruder should be adjusted to *** extruder frequency converter or to change the hauling speed so that the two speeds can be matched; followed by *** extruder under the material section of the cooling water jacket did not pass cooling water Reason;
Pipe production line in the actual production process will also appear other abnormalities, according to the actual situation even if the treatment.
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Extruder is a common plastic machinery and equipment, in the daily operation of the extruder in the process, the extruder will appear a variety of faults, affecting the normal production of plastic machinery, the following we will analyze the extruder failure.
Extruder failure analysis: host current instability
1, production reasons:
(1) uneven feeding.
(2) main motor bearing damage or poor lubrication.
(3) A section of the heater is out of order and does not heat.
(4) Screw adjustment pads are not correct, or phase is not correct, element interference.
2, treatment:
(1) Check the feeder, troubleshooting.
(2) Overhaul the main motor, if necessary, replace the bearings.
(3) Check each heater for proper operation and replace the heater if necessary.
(4) Check the adjustment pad, pull out the screw to check the screw for interference.
Extruder failure analysis: the main motor can not start
1, the cause:
(1) driving program is wrong.
(2) the main motor thread has a problem, whether the fuse wire is burned ring.
(3)The interlocking device related to the main motor works
2. Treatment:
(1)Check the program and drive again in the correct driving order.
(2) Check the main motor circuit.
(3) Check whether the lubricating oil pump starts, and check the status of the interlocking device related to the main motor. The motor cannot be turned on without the oil pump.
(4) Inverter inductance is not discharged, turn off the main power and wait for 5 minutes before starting.
(5) Check whether the emergency button is reset.
Extruder failure analysis: the head of the material out of the poor or blocked
1, the causes:
(1) the heater does not work in a certain section of the material is poor plasticization.
(2) The operating temperature is set low, or the molecular weight distribution of the plastic is wide and unstable.
(3) There may be foreign material that does not melt easily.
2. Treatment:
(1) Check the heater and replace it if necessary.
(2) Verify the set temperature of each section, and if necessary, consult with the processor to increase the temperature setting
(3) Clean and inspect the extrusion system and the head.
Extruder failure analysis: the main electric start-up current is too high
1, the cause:
(1) insufficient heating time, torque.
(2) a section of the heater does not work.
2, treatment:
(1) driving should be hand disk car, if not easy, then extend the heating time or check whether the section heater is working properly.
Extruder failure analysis: the main motor makes an abnormal sound
1, the cause:
(1) the main motor bearing damage.
(2) the main motor silicon controlled rectifier line in a silicon controlled damage.
2, treatment:
(1) Replace the main motor bearings.
(2) check the silicon controlled rectifier circuit, if necessary, replace the silicon controlled components.
Extruder failure analysis: the main motor bearing temperature rise is too high
1, the causes:
(1) poor bearing lubrication.
(2) bearing wear is serious.
2. Causes:
(1) Check and add lubricant. Check motor bearings and replace if necessary.
Extruder failure analysis: head pressure instability
1, the causes:
(1) the main motor speed is not uniform.
(2) Uneven rotational speed of the feeding motor, fluctuations in the amount of feed.
2. Treatment:
(1) Check the main motor control system and bearings.
(2) Check the feeding system motor and control system.
Extruder failure analysis: low lubricating oil pressure
1, the cause:
(1) lubricating oil system regulator pressure setting value is too low.
(2) Oil pump failure or suction pipe blockage.
2, treatment:
(1) Check and adjust the lubricating oil system pressure regulator.
(2) Check the oil pump, suction pipe.
Extruder failure analysis: automatic screen changer is slow or does not work
1, the cause:
(1) low air pressure or oil pressure.
(2) cylinder (or hydraulic station) leakage (or oil leakage)
2, treatment:
(1) check the power system of the screen changer.
(2) Check the sealing of cylinder or hydraulic cylinder.
Extruder failure analysis: safety pin or safety Jian was cut off
1, the cause:
(1) extrusion system torque is too large
(2) the main motor and the input bearing coupling is not centrifugal
2, the treatment method:
(1) check the extrusion system is not the entry of metal and other things stuck screw. At the beginning of the occurrence, check whether the preheating warming time or warming value is
compliant with the requirements.
(2)Adjust the main motor
Extruder failure analysis: extrusion amount suddenly dropped
1, the cause:
(1)Feeding system failure or hopper no material
(2)Extruding system into the hard jammed screw, so that the material can not be passed
2, treatment:
(1) Check the material level of feeding system or hopper
(2) Check and clean the extrusion system.
Taking a look at this will not only solve your problem, but also make you more knowledgeable about the extrusion want machine.
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