The glue dispenser sends the compressed air into the syringe or the glue bottle, presses the glue into the feed tube connected to the piston chamber, and uses the pressure to perform the glue dispensing operation. When the piston is on the upstroke, the piston chamber will be filled with glue; when the piston pushes down the glue dispensing needle, the glue will be pressed out from the needle nozzle under pressure. The amount of glue dripped is determined by the distance of the plunger, which can be adjusted manually or controlled by programming.

Glue dispensing machine, also known as glue applicator, glue filling machine, glue machine, glue dispenser, is an automatic machine equipment that controls fluid and drips, coats, and pots liquid on the surface of the product or inside the product. The glue dispenser is mainly used for accurate pointing, pouring, injecting, coating, and dripping of glue, paint and other liquids in the product process to the precise position of each product, and can be used to achieve dots, lines, circles or arcs.