Glue filters have a very important role in adhesive systems. They stop dirt that could clog the nozzle and stop the application of glue to the joined materials. We filter the glue from the tank using the appropriate gradation main filter and in the next stage we filter the glue after the hoses before the guns/heads. The filter gradation is adjusted to the nozzle diameter.
The size of the nozzle opening determines the pressure that is necessary to apply a certain amount of glue at a given rate time. The nozzle diameter should be such that the appropriate amount of glue can be applied required a pressure greater than 30 – 40 bar. This applies to most track applications. Therefore, it is important that the glue nozzle has the appropriate capillary length and diameter.
Heated hose used to melt and maintain a constant, elevated temperature of the glue between the melter and the glue applying head.
We use gear pumps mainly for continuous applications. They ensure constant adhesive pressure during application. The pumps differ in size adapted to the demand for hot melt glue.
Piston pumps – pneumatic, used mainly in the packaging industry. Pumps, depending on the device, are characterized by a ratio, i.e. the amount of air pressure given to the pump translates into the glue pressure, usually 12:1 or 14:1 pumps, i.e. 1 bar of air gives 12 or 14 bars of glue at the pump output.
Glue modules are part of the gun or head for applying glue. Modules are consumable parts, their service life is usually from 40 to 100 million cycles.
Glue guns are the common name for the last element of the glue application system. Guns are divided into single– or multi-module and electric or pneumatic. Guns can be configured for a given application.