During the process of printing circuit boards, the reasons for unclear characters and disconnected lines are analyzed as follows:
one,First of all, check whether the board surface after welding is clean and tidy, and make sure there is no dirt on the board surface, so that the printed characters can be clear and continuous. If the board surface is not clean or not cleaned properly, it will cause the characters to fall off due to insufficient bonding force of the ink or It does not stick to oil, which will also cause unclear characters and broken lines, so the board must be cleaned before printing characters.
2,Preparation work before printing characters and checking the state of the screen; whether the ink coating of the printing ink scraper and the scraper mark are smooth; whether the pressure is uniform; the balance of the screen height; the pressure of the ink scraper.
3,If the printed characters are broken and unclear, stop the machine and check whether the screen frame is in good condition; whether the image of the characters is clear; whether the printing ink scraper is covered with ink; and the pressure of the ink scraper.
4,If there are no problems with the above, if there are still unclear characters and disconnection problems that have not been solved, it is recommended to replace the ink and conduct experiments. Because the thermoset character ink itself has poor printing performance due to quality problems, and poor binding force will also cause printed characters Unclear and disconnected.