During the working process, the squeegee of the screen printing machine sometimes fails to move or presses on the screen. What is the reason?
1. Incorrect squeegee angle
If the angle of the squeegee is too large or too small, the squeegee may not move during screen printing. It needs to be adjusted to a suitable angle, generally 45 degrees is suitable.
2. Ink viscosity is too high
The scraper pushes the ink. If the scraper does not move, it may be that the viscosity of the ink is too high and the scraper cannot push it. Replace the ink with a lower viscosity to solve the problem.
3. Insufficient force applied by the operator
Sometimes the operator exerts a relatively large pressure on the squeegee at the beginning, and then relaxes the pressure on it when moving the squeegee, which may cause the squeegee not to move, and also affect the printing quality.
4. Electrical failure
There may be electrical faults, such as button damage, PLC fault, solenoid valve or flow limiting valve damage, cylinder damage, etc. It is necessary to find out the cause of the fault and carry out maintenance.
