Solutions to the problem of unstable output of dispensing machine, small skills and normal operation methods of dispensing machine, factors influencing the output of dispensing machine, how to deal with the problem of wrong output in the use of dispensing machine, adjustment steps of output of dispensing machine and methods of improving precision.
How is the output of dispensing machine unstable?
Dispensing machine to bring you convenience and efficiency at the same time, of course, there will inevitably be a variety of problems. If not solved in time, it will affect work efficiency. Most of them have unstable air pressure, unstable glue and unstable glue output.
Unstable air pressure will lead to unstable dispensing accuracy, wrong point and leakage point. At this time can be equipped with a pressure regulator or control valve pressure to stabilize the amount of glue, but also check the glue out time, the longer the glue out time, the more stable the glue out will be.
Glue instability: This is reflected in the difficulty of glue spitting out, weak fluidity and wire drawing, which is generally due to the use of high viscosity glue. You can take measures to close the glue delay: as the name suggests, there is still glue between the glue outlet of the glue head and the glue valve after closing the glue head. Delay for a period of time, wait for the glue flow, and then perform the follow-up action. 2： The lifting height is that when the dispensing of a section of track is finished, the rubber head will move to the starting point of the next section of track. At the end point, the rubber head will be lifted a little to ensure the safety of the rubber head, and then move to the starting point of the next section of track.
Instability of glue output: it is mainly caused by instability of pressure cylinder or air pressure for storing fluid. The inlet pressure regulator should be set at 10 to 15 psi lower than the minimum pressure in the plant. The pressure used in the pressure cylinder should be above the middle of the regulator. The control pressure of the rubber valve should be at least 60 psi to ensure the stability of the rubber. Finally, check the glue out time. If it is less than 15 / 1000 seconds, the glue out will be unstable. The longer the glue out time is, the more stable the glue out will be.
Formal operation skills:
When operating the automatic dispenser, the problem is the effect of dispensing. The quality of dispensing products is directly related to the control of dispensing quantity. Besides the setting parameters, the effect of dispensing quantity control is also related to the maintenance of the automatic dispenser. There are several reasons for the poor control of the dispensing volume of the automatic dispensing machine. First, the air pressure of the air pipe is not enough, so the control effect of the dispensing volume is not obvious. Second, there are leakage drops and too small dispensing volume. Third, the dispensing needle is blocked due to the second use of the dispensing needle. The air pressure of the automatic dispensing machine should be controlled in an appropriate range, without overpressure and low air pressure, If the air pressure is not within the required range, it is easy to cause poor glue output. The main reason is that the air pressure is insufficient only when the air pressure tank of the dispenser is unstable. The air inlet pressure gauge should be adjusted to about 11 to 14 psi, and the air pipe pressure should be above the glue output control of the automatic dispensing function. The main reason for dripping during dispensing is that the concentration of glue is not enough, which leads to the glue flowing down the needle during dispensing. As long as the vacuum suction function is added, a certain amount of pressure difference between the internal pressure of dispensing valve and the external atmospheric pressure can be used, so that the dispensing valve can be closed to control the amount of glue, In order to improve the control of the amount of glue, it is necessary to carry out the maintenance of the dispensing machine. If you need to use the automatic dispensing machine to complete the special arc dispensing, in addition to controlling the amount of glue, you also need to complete the arc path programming through the dispensing controller to improve the dispensing quality. After a long time of arc path dispensing, the repetition accuracy will be affected, so the maintenance and adjustment of the automatic dispensing machine can improve the quality of arc dispensing.
There are three factors that affect the control amount of dispensing machine
In the electronic manufacturing industry, there are many places need professional equipment for dispensing and sealing. In dispensing, the distance between the dispensing needle and the circuit board and the inner diameter of the needle are the most important parameters. If the distance between the needle and the substrate is not correct, the operator will never get the correct dispensing result. With other parameters unchanged, the larger the distance between the dispensing needle and the circuit board, the smaller the diameter of the dispensing point and the higher the height of the dispensing point; The smaller the distance between the dispensing needle and the circuit board, the larger the diameter of the dispensing point and the lower the height of the dispensing point.
