Die Auftragsköpfe

Order heads are used in automated processes. The application head usually consists of a base body, a solenoid valve and a module.

The application heads for different applications

There are generally different types of application heads. If the costs are to be reduced for large quantities and the precision of a manual application with a hand gun is not sufficient, the space conditions do not allow manual application or the application of the adhesive has to be monitored, the individual application heads of different designs are used. In this case, these are part of the packaging machine and are integrated into a higher-level programmable logic controller or controlled via an individual controller of the sections. The application heads are usually permanently installed and the workpiece is fed through underneath.

Application heads for bead application

Dots or beads are applied in lines according to their arrangement. Depending on the task, one or more heads are used. If there are several heads, they can be combined with several modules to form a block or arranged separately. The hot-melt adhesive can also be applied horizontally or, in special cases, upside down.

The application heads for the spray application

If the individual workpieces have to be glued together over a large area, then spray application heads are used. If a low consumption of adhesive is required, the individual spray application heads have many advantages. A thin strand of adhesive is deflected by an air vortex on the side, carried along and applied in a circular pattern to the workpiece. A flat application pattern can be created by a relative movement between the workpiece and the application head. In this case, the entire surface is not wetted with adhesive, but only a few lines are created and dots are created at the point where the circles cross. This type of application is primarily used when bonding foam and cardboard or paper. The uses are determined by the type of adhesive paper or.

Application heads for area applications

Surface application heads are a special form of bead application heads. Instead of the nozzle, a distributor for the adhesive is flanged on, which applies the adhesive over a certain width over the entire surface and with a particularly thin layer thickness. While spray application heads or beads are always at a certain distance from the workpiece, a surface application head is always in direct contact with the substrate. Because that substrate rubs against the applicator head, the lip of the head is not made of aluminum or brass, but is made of steel and is partially hardened. The surface application heads of the BÜHNEN brand offer very good demolition quality, precise application and are intended for continuous and intermittent application.

The structure of an order header

The main body of the head offers a very good connection option for the heatable hose and has a possibility for attachment to the frame. In the base body there is the option of heating with the cartridge and a temperature sensor. The bores for guiding the adhesive and the compressed air run across the base body. Most of the types also contain a filter with a very fine mesh size.

 

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