How to Deal with Glue Hanging on the Dispenser?

Common problems when using high-viscosity glue for automatic and desktop dispensers are nozzle/needle sticking glue, residual glue, sticking glue, residual glue will produce wire drawing or large ends/tails, which will affect the quality of the dispensing effect. Let's look at the solution below:

Cleaning position for discharging and wiping: Install a vacuum discharging device on the machine to clean the needle or nozzle at the cleaning position after each dispensing is completed. In addition, if it is a relatively awkward needle or nozzle, you can directly use nylon Wipe with a cloth to remove any glue or residual glue.

Suction back: Use a controller with suction back function. The air pressure of the controller is connected to the feeding tube. When the dispensing is finished, the feeding air pressure is switched to the suction air pressure to suck the glue back into the nozzle. Pay attention to adjust the amount of suck back Re-suction is sufficient to ensure that the nozzle is free of glue. Excessive suction will affect the next glue output.

Heating glue: The viscosity of the glue will decrease with the increase of temperature, and the viscosity will increase with the decrease of temperature, so heating enhances the fluidity of the glue to avoid hanging glue.

Closing the valve in advance: closing the valve body in advance, in the programmed trajectory gluing, turn off the valve body switch before reaching the end point, and run the remaining part of the programming distance with the remaining pressure and remaining glue and other parameters unchanged, that is, Can avoid hanging glue or residual glue and wire drawing at the end.If you are using a spray valve, you can set the valve to close in advance in the parameters, that is, turn off the glue switch in advance. At this time, there will be glue hanging on the needle and the programming stroke has not ended, and the atomization is still Continue to atomize the residual glue or hanging glue on the needle to the last stroke of the programming.