Nozzle arrangement for an edge strip applying device for supplying hot air to an edge strip or workpiece which is adhesive-free and can be activated by heat or which is coated with a hot-melt adhesive, and edge strip applying device comprising a nozzle arrangement

Abstract

The invention relates to a nozzle arrangement (1) for an edge strip applying device for supplying hot air to an edge strip (2) or workpiece which is adhesive-free and can be activated by heat or which is coated with a hot-melt adhesive, comprising a nozzle body (3) with - at least one air inlet channel (20, 21) which can be connected to a hot air generator such that pressurized hot air can be fed to the nozzle body (3) during the operation of the edge strip applying device, - at least two groups (4a, 4b, 4c) of air outlet openings (40), wherein the air outlet openings (40) are formed on an air outlet surface (30) of the nozzle body (3) at a distance from one another in the vertical direction, said outlet surface facing the edge strip (2), and are fluidically connected to the at least one air inlet channel (20, 21) such that the at least two groups (4a, 4b, 4c) of air outlet openings (40) are spaced from one another in the advancing direction of the edge strip (2) and the hot air fed to the nozzle body (3) can be discharged out of the air outlet openings (40) and supplied to an edge strip (2) functional layer which can be activated by heat, and - a number of closing organs (6, 6') which are designed such that at least some of the air outlet openings (40) can be optionally opened or closed dependent on the width of the fed edge strip (2), said number corresponding to the number of groups (4a, 4b, 4c) of air outlet openings (40).

Description

technical field [0001] The invention relates to a nozzle system for an edge-strip application device that impinges hot air on an adhesive-free, heat-activatable or provided edge strip or workpiece. Furthermore, the invention relates to an edge strip application device with a nozzle system. Background technique [0002] It is known in the prior art to have various embodiments of edge strip application plants (often also called edge gluing plants) with which edge strips can be applied to workpieces on the narrow side. The edge strip, which is also generally called wraparound tape, can have, for example, a heat-activatable adhesive on one side. The adhesive is activated in the edgeband application system by impinging hot air or air, so that after the edgeband has been applied and pressed against the narrow side of the workpiece, a material bond of the edgeband to the narrow side is achieved The (stoffschluessig) seam connection. In some cases, the edge strip is only provide...

AI Technical Summary

Problems solved by technology

It has been found that the use of adhesives when applying edge strips to narrow sides of workpieces has several disadvantages

In addition to process-technical difficulties, there is often the problem that the adhesive layer remains visible to the observer after the edgeband has been applied to the workpiece and thus impairs the visual image

However, the operating speeds achievable so far are still unsatisfactory

Images