Analysis on the failure of filling and stoppering machine

The phenomenon analysis of filling and stoppering machine appears after * times, and always four (or five) heads of a group are filled at the same time It is certain that the start signal of the second filling is received From the display screen, there is a "running" display Because the equipment does not detect the start signal during the filling process, it indicates that another start signal is received at the end of filling Since it does not appear every time, it indicates that it is an interference signal Why does it not appear in the stable period, and the probability of it is high when filling at a slow speed? Through field observation, it is found that the time when the start signal light on the PLC is on becomes shorter with the increase of the filling speed, and the slower it is, the longer it is It indicates that the closer the time of starting signal ending or lagging the filling time, the easier the secondary filling phenomenon will appear In other words, when the start signal on our control board disappears, it is easy to be affected by the interference signal, causing the secondary trigger Conclusion: the long start signal + interference signal is easy to cause the phenomenon of repeated filling Solution: due to the high pulse frequency of interference signal, anti-interference measures can be added on the starting line, but the interference signal can not be predicted and determined At the end of each filling, extend a period of time before the next detection to avoid the unstable period at the end of the previous start signal, but it may lead to the disadvantages that fast filling cannot be realized PLC sends the start signal for a short time (such as 20ms), so that no matter what kind of filling is completed, the start signal will always enter into a stable period, so that the control circuit is not easily affected by the interference signal This is the fundamental solution The fiber optic detection of the bottle feeding detection of the filling and stoppering machine is not sensitive, and there are some missed detection signals that cause the peristaltic pump not to fill Processing method: adjust the detection fiber or replace the new fiber The filling setting parameters are not set well, and the peristaltic pump does not work due to exceeding the normal working range Processing method: set up the filling parameters as required The silica gel tube has air leakage, the peristaltic pump has been working, and the liquid medicine has not been filled Treatment: check the air leakage part of the pipe and replace the new silica gel pipe There is a problem with the electrical control program, resulting in sometimes not filling Treatment: modify the electrical control program The sealing of suction port is poor, the sealing of discharge port is poor, the aging sealing of silicone rubber pipe is poor, the installation matching number is incorrect, and the wall of silicone pipe is too thin Methods check whether the silicone tube gasket and silicone tube at the suction end are well sealed, and check whether the silicone tube gasket and silicone tube at the discharge end are well sealed Replace the silicone tube with a new one and install it again according to the factory matching number.