What should we pay attention to when using dispensing machin
Release date：2021-08-24 10:20 Views：
The glue dot diameter of the dispenser shall be half of the pad spacing. If it is a post veneer dispenser, the glue dot diameter shall be 1.5 times that of the ordinary dispenser. This ensures that there is enough glue to bond the components while avoiding too much glue on the pad. Moreover, the dispensing amount and dispensing amount are mostly determined by the rotation time of the screw pump. In fact, we still have to choose the rotation time of the pump according to the production situation.
Generally, the inner diameter of the needle selected for the dispensing machine needle is about 1 / 2 of the diameter of the dispensing point. When the dispensing machine needle works in the dispensing machine, the dispensing needle shall be selected according to the product size, and the spacing between the needle and the working face. Different dispensing machines use different needles, and some needles have a certain blocking force. Therefore, it is required to master the spacing of the dispensing needle, Before each task, calibrate the distance between the needle and the task surface, that is, z-axis height calibration. Excessive back pressure is easy to cause glue overflow and excessive glue amount; If the pressure is too small, the dispensing of the dispensing machine will be interrupted and leak, resulting in defects. The pressure shall be selected according to the glue of the same quality and the working ambient temperature. High ambient temperature will reduce the viscosity and fluidity of glue in the dispenser. At this time, it is necessary to reduce the back pressure to ensure the supply of glue, and vice versa.