The reasons why the scraper of the screen printing machine does not move may involve multiple aspects, which are complex and diverse, and need to be investigated and resolved according to specific situations. Here are some common reasons and corresponding analyses:

1、 Improper adjustment of scraper

Incorrect scraper angle: The angle of the scraper should be consistent with the conical surface of the silk screen board. If the angle deviation is too large, it will cause the scraper to not move smoothly.

Inappropriate gap between scraper and printed material: The gap between scraper and printed material should be controlled within an appropriate range, usually between 0.1-0.3mm. A gap that is too small or too large may cause the scraper to not move properly.

2、 The scraper blade is aging or damaged

The scraper blade may experience wear or aging after prolonged use, which can reduce its ink scraping effect and even prevent the scraper from moving. At this point, it is necessary to replace the scraper blade with a new one in a timely manner.

3、 Insufficient pressure on silk screen mesh board

The pressure of the screen printing plate is crucial for the movement of the scraper and the printing effect. If the pressure is insufficient, the scraper may not be able to overcome the resistance of the ink and stop moving. At this point, it is necessary to increase the pressure on the screen printing plate appropriately, but attention should be paid to avoiding excessive pressure that may cause color cracking or damage to the surface of the printed product.

4、 Machine malfunction

Electrical component failures, such as PLC malfunctions, damaged solenoid valves, and damaged current limiting valves, can all cause the scraper to stop moving due to the inability to receive the correct control signal.

Mechanical component failures, such as cylinder damage, piston ring leakage, etc., can also cause the scraper to stop moving due to insufficient power.

5、 Other reasons

Excessive ink viscosity: Excessive ink viscosity can increase the difficulty of scraper movement and even cause scraper jamming. At this point, it is necessary to adjust the viscosity of the ink to an appropriate range.

External environmental influences: Changes in environmental factors such as temperature and humidity may also affect the movement of the scraper. It is necessary to ensure that the working environment of the machine meets the requirements to reduce the impact of external environment on the movement of the scraper.

In summary, the reasons why the scraper of the screen printing machine does not move may involve improper adjustment of the scraper, aging or damage of the scraper blade, insufficient pressure on the screen printing screen, machine failure, and external environmental influences. When troubleshooting and solving such problems, it is necessary to comprehensively consider various factors and take corresponding measures to ensure the normal operation of the screen printing machine.