1. Check the power connection
Verify that the power input voltage of the extruder matches the voltage of the power supply. Check that the power cable is securely connected and that the wiring terminals are not oxidized or corroded.
Check the wiring in the electrical control cabinet to ensure that the wiring is neat and orderly, without crossover and entanglement, and that the wiring terminals are tightly connected.
2. Check the control system
Turn on the power supply of the electrical control cabinet and check whether the display screen, indicator light and button of the control system work normally.
Go to the operation interface of the control system, and check whether the parameter setting window and operation instruction input window are displayed normally, and whether the operation instruction can be executed accurately.
3. Motor debugging
Point the motor and check whether the steering of the motor is consistent with the working requirements of the extruder. If the motor steering error, adjust the motor phase sequence.
Gradually increase the motor speed, check the operation of the motor at different speeds, and observe whether the motor has abnormal noise, vibration, overheating and other phenomena.
1. Calibrate the temperature sensor
Calibrate each temperature sensor using a standard thermometer to check the error between the measured value of the temperature sensor and the measured value of the standard thermometer. If the error exceeds the allowable range, calibrate or replace the temperature sensor.
Check whether the control mode of the heating system, such as PID control parameters are set properly. According to the actual situation, the PID control parameters are adjusted to achieve the best temperature control effect.
2. Heating function test
Set the heating temperature, start the heating system, and observe whether the heating element works normally and whether the heating speed meets the requirements.
Use infrared thermometer or contact thermometer to measure the temperature of the barrel, screw and other parts to check the deviation between the actual temperature and the set temperature. If the deviation is large, check and adjust the heating system, including checking the working state of the heating element, the output signal of the temperature controller, and the voltage of the heating power supply.
1. Check cooling water flow
Open the cooling water source, check whether there is leakage in the cooling water pipeline, and whether the water speed and flow rate meet the requirements.
Check whether the steering and rotation speed of the cooling fan are normal, and whether the air volume meets the cooling requirements.
2. Cooling effect test
When the heating system is working, start the cooling system and observe the cooling effect of the cooling system on the barrel, screw and other parts. Check whether the temperature after cooling can be stabilized within the set range.
Adjust the cooling water flow speed, cooling fan speed and other parameters to observe the change of cooling effect to determine the best cooling parameters.
1. Screw clearance adjustment
Check the clearance between the screw and the barrel to ensure that the clearance is uniform and meets the technical requirements of the equipment. If the clearance is uneven or does not meet the requirements, adjust by adjusting the installation position of the screw or changing the barrel bushing.
In the case of screw rotation, check whether there is friction and collision between the screw and the barrel. If there is an anomaly, stop the machine in time to check and adjust.
2. Screw speed adjustment
Start the screw at a lower speed, observe the rotation of the screw, and check whether there is abnormal noise, vibration and other phenomena.
Gradually increase the speed of the screw, check the stability of the screw operation and the change of the extrusion amount at different speeds. Record extrusion volume, power consumption and other data at different rotational speeds to provide reference for subsequent production.
1. Feed speed adjustment
Set the feeding speed, start the feeding system, observe the conveying of materials, and check whether the feeding speed is uniform and stable.
Adjust the feeding speed, observe the change of extrusion volume, pressure and other parameters of the extruder, and determine the best feeding speed.
2. Feed quantity control accuracy test
Set different feeding rates and check the error between the actual feeding rate of the feeding system and the set feeding rate. If the error is large, adjust the control parameters of the feeding system or repair and replace the feeding mechanism.
Check the stability and reliability of the feeding system during long-term operation, and observe whether there is plugging, leakage and other phenomena.
1. Check mold installation
Check whether the installation of the extrusion mold is firm, whether the connection between the mold and the cylinder is sealed well, and there is no leakage phenomenon.
Check whether the heating and cooling system of the mold works normally and whether the temperature distribution is uniform.
2. Product molding and debugging
Start the extruder, extrude the material through the mold, and observe whether the shape, size and appearance quality of the extruded product meet the requirements.
Adjust mold temperature, pressure, flow structure and other parameters to improve the molding quality of products. If the product wall thickness is not uniform, the surface is rough, the size deviation and other problems, the mold is adjusted and repaired accordingly.
1. Run tests continuously
Let the extruder run continuously for a certain period of time, such as 2-4 hours, to check the stability and reliability of the equipment during long-term operation.
Observe the operation of each component of the device, check for abnormal noise, vibration, overheating, and leakage, and record the operating parameters and faults of the device.
2. Production capacity test
On the basis of continuous running test, the actual production capacity of the extruder is measured to check whether the production capacity meets the design requirements.
According to the production capacity test results, the process parameters and operation status of the equipment are further optimized and adjusted to improve the production efficiency and product quality of the equipment.
