Shrink tunnel machine is a automatic packing machine, this kind of packing equipment is mainly is wrapped with shrink film products, many industries are now using this kind of packaging machinery, so automatic shrink machine problem solutions, can help us to understand this kind of machine fault problem, let me make a brief introduction for you.
Shrink tunnel machine common fault one: plc failure.
plc fault is mainly output point relay contact adhesion. If the point controls the motor, the fault phenomenon is that there is a signal to start the motor, the motor runs, but after the stop signal is sent, the motor does not stop running, when the plc power failure, the motor stops running. If the point controls the solenoid valve. The fault phenomenon is that the solenoid valve coil is constantly charged and the cylinder is no longer in position. If the external force impinges on plc to separate the adhesion points, it can assist in judging the fault.
Shrink tunnel machine repair method: PLC output points of failure maintenance method has two, a is more convenient to use the programmer modify the program, amend the damage output points to spare output point, at the same time line.
If there is no programmer, you can use the more troublesome second, remove the plc, the standby point of the output relay removed and replaced on the damaged output point. Then install according to the original cable.
Shrink tunnel machine common fault two: proximity switch fault.
Shrink tunnel machine have five proximity switches. Three are used for knife protection and two are used to control the upper and lower film releasing motor. Which is used for the control knife protection, the occasional wrong action, will interrupt the normal operation process, and because of the few times of failure, short time, to the fault analysis and elimination of certain difficulties. The typical failure is the occasional fusible knife drop not in place and automatic lift. The reason for the failure is that the melt knife does not encounter the object to be packaged in the process of descending, and the lift proximity switch of the melt knife loses the signal, just like the knife guard plate touches the object to be packaged, the melt knife automatically returns upward.
Shrink tunnel machine repair method: a switch of the same model can be installed in parallel with the lift proximity switch of the welding knife, and the two switches work in parallel to improve its reliability.
Shrink tunnel machine common fault three: magnetic switch fault.
The magnetic switch is used to detect the cylinder position and control the cylinder travel. The four cylinder movements of lamination, pushing bag, pressing bag and melting knife are interrelated, and their positions are detected and controlled by magnetic switches. The fault is mainly manifested as the following cylinder does not move, the reason is that the cylinder speed is too fast, so that the magnetic switch cannot detect the signal. If the speed of the cylinder is too fast, the cylinder of the pressing and melting knife will not move after the resetting of the pushing bag.
Shrink tunnel machine repair method: adjust the throttle valve on the cylinder and its two-position five-way solenoid valve, reduce the compressed air flow, reduce the cylinder running speed, until the magnetic switch can detect the signal.
Shrink tunnel machine common fault four: solenoid valve failure.
Solenoid valve failure is mainly manifested as the cylinder does not act or no longer position, the reason is that the cylinder solenoid valve can not reverse or channeling.
If the solenoid valve channeling, because of the inlet and outlet of the air road, the air pressure of the machine can not reach the working pressure, the knife beam does not rise in place. The tool beam protection proximity switch does not work, the prerequisites for full machine operation do not hold, and the machine does not operate, which is easily confused with electrical failure.
Shrink tunnel machine repair method: solenoid valve channeling air leakage sound, listen carefully to the sound source and hand search for air leakage point, generally can easily find the electromagnetic valve channeling.
