Abstract: A method and device for producing a predetermined breaking line in a vehicle interior trim part with a scanning laser beam. An actual position of the vehicle interior trim part held in a working plane relative to a laser scanning device is detected by a camera and the actual position of the predetermined breaking line is derived. A stored desired position for a scan figure corresponding to the predetermined breaking line is corrected to an actual position, whereby the predetermined breaking line is produced at a predetermined position on the vehicle interior trim part during scanning of the scan figure. A positional shift of the scan figure becomes possible because a sensor matrix with an upstream diffuser is used, which can detect transmitted components of the laser beam independently of the position of the laser beam along the scan figure.

Abstract: The invention is directed to a method for introducing a predetermined break line in a multilayer airbag covering with a carrier layer, a supporting layer and a decorative layer by a laser. In order to prevent an undesirable burning of the supporting layer over a large area as a result of the occurring combustion gases, it is suggested that the carrier material is ablated by a width that is greater than the diameter of the impinging beam to facilitate the escape of the combustion gases.

Abstract: A method for producing an interior trim part in a vehicle having a decorative layer of leather, wherein the fiber structure of the leather is fixed by undercooling or by a fixing agent at least along a desired weakened line before the weakened line is produced by a laser and for the duration of the laser treatment. The leather comprises a dermis having an underside and a top skin having a decorative side. The weakened line is preferably formed by a series of perforations.

Abstract: The invention is directed to a method for introducing a predetermined break line in a multilayer airbag covering with a carrier layer, a supporting layer and a decorative layer by a laser. In order to prevent an undesirable burning of the supporting layer over a large area as a result of the occurring combustion gases, it is suggested that the carrier material is ablated by a width that is greater than the diameter of the impinging beam to facilitate the escape of the combustion gases.

Abstract: A method for producing an interior trim part in a vehicle having a decorative layer of leather, wherein the fiber structure of the leather is fixed by undercooling or by a fixing agent at least along a desired weakened line before the weakened line is produced by a laser and for the duration of the laser treatment. The leather comprises a dermis having an underside and a top skin having a decorative side. The weakened line is preferably formed by a series of perforations.

Abstract: The invention is directed to packaging comprising a multiple-layer material construction with a break line which is formed by a line-shaped, successive arrangement of blind holes separated by webs and in which the multiple-layer material construction comprises at least one layer which absorbs laser radiation and a layer which reflects this laser radiation. A radiation-absorbing layer forms the surface layer of the packaging, and the blind holes of the surface layer extend into the packaging until the reflecting layer, and the web widths are substantially constant over the depths of the blind holes so that there are abrupt jumps in material thickness along the break line, and a clearly audible noise is generated when these jumps in material thickness are overcome when the break line tears. The invention is further directed to a method for producing packaging of this kind.

Abstract: In order to prevent mechanical loading of a predetermined breaking line integrated in an airbag covering when arranging an ejection channel by a material engagement, it is proposed, in accordance with the invention, that the material engagement be produced by laser transmission welding, wherein the contact pressing force required for this purpose is applied by a frictional engagement or positive engagement encompassing the joining surfaces to be welded.

Abstract: The invention is directed to a method for introducing an integrated predetermined breaking line in a planar extending article. The method is particularly suitable for introducing an invisible predetermined breaking line with a reproducible, defined tearing resistance by means of a laser in an inhomogeneous material, such as a woven material, which can serve as the decorative layer of an airbag covering. According to the invention, the laser output is controlled depending upon the amount of material along the desired predetermined breaking line.

Abstract: A method for the improvement of welding properties of galvanized steel panels by pretreatment of the surface in the joint zone provided for the welding connection in which a stream of an atmospheric low-temperature plasma is directed onto the surface.

Abstract: A method for introducing a line of weakening with a low opening resistance in an airbag cover, comprising a substrate layer, a foamed material layer and a decorative layer in which a row of pocket holes s generated by laser radiation, wherein, alternately, first groups of pocket holes with a length a and with a quantity x of shallow pocket holes are generated only in the substrate material and second groups of pocket holes with a length b and with a quantity y of deep pocket holes are generated through the substrate material and through the foamed material layer into the decorative layer, and the foamed material layer is retained in the area of the first groups of pocket holes as a supporting layer.

Abstract: Disclosed is a method for separating optical fibers by means of CO2 laser radiation, appllicable with various types and sizes of fibers with or without cladding as well as with fiber bunches and fiber components. According to the inventive method, separation is performed by means of a special impulse regime adapted to each material, whereby minuscule volumes of material are removed along a line in a sawing-like process until complete separation has been achieved.

Abstract: A device for welding a plurality of thermoplastic plastic parts (parts to be joined) forming a hollow body with an opening by a laser, comprising a vacuum holder having a vacuum chamber which communicates with a vacuum pump, is open on one side and, together with the hollow body, forms a closed chamber that can be evacuated. When a vacuum is applied, the vacuum holder holds the hollow body stationary, holds the joined parts together and enables testing of the tightness of the weld.

Abstract: In a method for joining plastic structural component parts by laser radiation, it is the object of the invention to prevent impairment of the surface quality by the falling in of material of the quality surface in thin-walled plastic structural component parts when the latter are connected to another part. A first thin-walled plastic structural component part having a quality surface is formed so as to be absorbent for the laser radiation and is welded by the transmission radiation method on a side located opposite from the quality surface to a second plastic structural component part which is transparent to the laser radiation.

Abstract: An arrangement for machining workpieces by a laser, particularly for cutting, perforating, notching, engraving, drilling and inscribing workpieces with three-dimensional structures of different sizes. The laser beam is directed to the workpiece, which is fixed on a holding device, by means of a robot-guided articulated mirror arm and a laser scanner. The laser beam is guided by a coordinated time-controlled and position-controlled deflection of the articulated mirror arm and of the mirror elements of the laser scanner.

Abstract: A method for introducing a line of weakening with a low opening resistance in an airbag cover, comprising a substrate layer, a foamed material layer and a decorative layer in which a row of pocket holes s generated by laser radiation, wherein, alternately, first groups of pocket holes with a length a and with a quantity x of shallow pocket holes are generated only in the substrate material and second groups of pocket holes with a length b and with a quantity y of deep pocket holes are generated through the substrate material and through the foamed material layer into the decorative layer, and the foamed material layer is retained in the area of the first groups of pocket holes as a supporting layer.

Abstract: A method for working a parting agent layer applied to a substrate material, in which the parting agent layer is acted upon by the radiation energy of a TEA CO2 laser, so that the parting agent layer is heated at least partly to above the destruction temperature of the parting agent and the parting agent therefore loses its parting properties. The substrate material can be particularly a glass forming a vehicle window or a glass powder coat or rubber applied to a window.

Abstract: An arrangement for machining workpieces by a laser, particularly for cutting, perforating, notching, engraving, drilling and inscribing workpieces with three-dimensional structures of different sizes. The laser beam is directed to the workpiece, which is fixed on a holding device, by means of a robot-guided articulated mirror arm and a laser scanner. The laser beam is guided by a coordinated time-controlled and position-controlled deflection of the articulated mirror arm and of the mirror elements of the laser scanner.

Abstract: An airbag cover is defined by a predetermined breaking line which is introduced into a shaped flat material in a recessed manner. The recesses are achieved by removing material by means of laser radiation. According to the invention, the flat material is provided with a barrier layer. The barrier layer, by reason of its material properties, has greater resistance to removal of material by laser action than the material of the rest of the flat material. The recesses made by removing material extend along the predetermined breaking line in the flat material up to the barrier layer. The barrier layer makes it possible to produce a predetermined breaking line by means of laser machining which allows an exact residual wall thickness of the airbag cover in the area of the predetermined breaking line, so that the tearing strength can be adjusted very accurately, which is critically important for a reliable deployment of an airbag.

Abstract: A device for welding a plurality of thermoplastic plastic parts (parts to be joined) forming a hollow body with an opening by a laser, comprising a vacuum holder having a vacuum chamber which communicates with a vacuum pump, is open on one side and, together with the hollow body, forms a closed chamber that can be evacuated. When a vacuum is applied, the vacuum holder holds the hollow body stationary, holds the joined parts together and enables testing of the tightness of the weld.