Abstract: A method for separating a workpiece along a separation line by using ultrashort laser pulses of a laser beam includes splitting the laser beam, using a beam splitter optical unit, into a plurality of partial laser beams. Each partial laser beam is focused by a focusing optical unit onto a surface and/or into a volume of the workpiece so that the partial laser beams are arranged next to one another and spaced apart from one another along the separation line. The method further includes implementing material ablation in the workpiece along the separation line by introducing the ultrashort laser pulses into the workpiece. The partial laser beams are repeatedly moved away from an initial position along the separation line by a deflection value and are subsequently moved back into the initial position. The deflection value is less than or equal to a distance between two adjacent partial laser beams.

Abstract: A method for separating a workpiece along a separation line by using ultrashort laser pulses of a laser beam includes splitting the laser beam, using a beam splitter optical unit, into a plurality of partial laser beams. Each partial laser beam is focused by a focusing optical unit onto a surface and/or into a volume of the workpiece so that the partial laser beams are arranged next to one another and spaced apart from one another along the separation line. The method further includes implementing material ablation in the workpiece along the separation line by introducing the ultrashort laser pulses into the workpiece. The partial laser beams are repeatedly moved away from an initial position along the separation line by a deflection value and are subsequently moved back into the initial position. The deflection value is less than or equal to a distance between two adjacent partial laser beams.

Abstract: A method for separating a workpiece along a separation line by using laser pulses of a laser beam includes splitting the laser beam into a plurality of partial laser beams using a beam splitter optical unit, focusing the plurality of partial laser beams onto a surface of the workpiece and/or into a volume of the workpiece using a focusing optical unit, so that the plurality of partial laser beams are arranged next to one another and spaced apart from one another along the separation line, and ablating material of the workpiece along the separation line by introducing the laser pulses of the plurality of partial laser beams into the workpiece. The laser power per partial laser beam is adjusted depending on an ablation depth obtained in the workpiece.

Abstract: A spinning machine and method are provided for feeding a sliver end of a sliver deposited in a can to a spinning position of the spinning machine, wherein the spinning machine includes a plurality of adjacently arranged spinning positions and a plurality of cans arranged in at least a first row under the spinning positions. With a sliver gripper of a robot, the method includes seeking the sliver end from one of the cans in an area that includes at least one adjacent spinning position to a spinning position to be supplied. The sliver end is grasped with the sliver gripper and fed to the spinning position to be supplied.

Abstract: A method for feeding a sliver end (2) of a sliver (8) deposited in a can (9) to a spinning station (3) of a spinning machine (1), wherein the spinning machine (1) comprises a plurality of adjacently arranged spinning stations (3) including cans (9) located under the spinning stations (3) in at least one row, and wherein a robot (12) grasps the sliver end (2) with the aid of a sliver gripper (14) and feeds it to a spinning station (3a) to be supplied. According to the invention, the sliver end (2) is sought in an area of at least one of the adjacent spinning stations (3b) of the spinning station (3a) to be supplied, preferably in the area (Ba) of the spinning station (3a) to be supplied and of at least one of the spinning stations (3b) adjacent to this spinning station (3a), is taken up by the sliver gripper (14) and is then fed to the spinning station (3a) to be supplied.

Abstract: Proposed is a method for producing a rotating disc for machining material surfaces, said disc comprising a disc-shaped main body (10), which has a central receptacle (14) for direct or indirect connection to a drive shaft, and a material machining coating (18), which is applied to a ring zone (12) of the main body (10) that is arranged on an end face, comprising the following steps: placing glass fabric mats in a mold cavity of a production tool; compressing the glass fabric mats in the production tool to form the main body (10) having a lip (16) which is configured in a section at least close to the edge; demolding the main body (10); applying the material machining coating (18) to the end face of the main body that faces away from the lip (16); stacking main bodies (10) of the same kind, each having a material machining coating (18) applied thereto, so that the lip (16) of one main body (10) is directly supported on the material machining coating (18) of a next main body (10); exerting a pressure on the

Abstract: An apparatus and method for depositing synthetic fibers to form a non-woven web includes guiding the synthetic fibers by a blowing stream through a drawing unit for depositing on a deposit belt. Multiple guidance elements are arranged inside the guidance distance between a blast opening of the drawing unit and the deposit belt, and form a guidance channel above the deposit belt. The guidance elements form a channel opening at a distance from the blast opening of the drawing unit. In order to achieve constant strength in the deposition of the fiber strands, the distance between the outlet of the drawing unit and the channel opening of the guidance channel is larger than half the guidance distance, and the guidance width of an open space formed between the outlet of the drawing unit and the channel opening of the guidance channel is larger than the guidance channel.

Abstract: A process and a device involves melt-spinning and cooling synthetic filaments. Therein, a plurality of filaments is extruded from a polymer melt and, after the extrusion, is guided into a cooling shaft for cooling. Within the cooling shaft cool air is blown, via a blower wall, into the cooling shaft, where, for cooling, the filaments are guided along the blower wall and at a distance from it. In order to obtain cooling adapted to the particular filament titer, the blowing onto the filaments can be set by selecting one of several operating positions, where to change the operating position of the blower wall it is moved in the direction towards the filaments or in the direction away from the filaments.

Abstract: An apparatus and method for depositing synthetic fibers to form a non-woven web includes guiding the synthetic fibers by a blowing stream through a drawing unit for depositing on a deposit belt. Multiple guidance elements are arranged inside the guidance distance between a blast opening of the drawing unit and the deposit belt, and form a guidance channel above the deposit belt. The guidance elements form a channel opening at a distance from the blast opening of the drawing unit. In order to achieve constant strength in the deposition of the fiber strands, the distance between the outlet of the drawing unit and the channel opening of the guidance channel is larger than half the guidance distance, and the guidance width of an open space formed between the outlet of the drawing unit and the channel opening of the guidance channel is larger than the guidance channel.

Abstract: A process and a device involves melt-spinning and cooling synthetic filaments. Therein, a plurality of filaments is extruded from a polymer melt and, after the extrusion, is guided into a cooling shaft for cooling. Within the cooling shaft cool air is blown, via a blower wall, into the cooling shaft, where, for cooling, the filaments are guided along the blower wall and at a distance from it. In order to obtain cooling adapted to the particular filament titer, the blowing onto the filaments can be set by selecting one of several operating positions, where to change the operating position of the blower wall it is moved in the direction towards the filaments or in the direction away from the filaments.

Abstract: A method and a device for melt spinning and depositing synthetic filaments into a nonwoven material are described. The synthetic filaments are extruded and pulled off here simultaneously next to one another in several filament groups and deposited jointly on a belt. Taking into consideration a later final processing of the nonwoven material, the filaments of the filament groups are deposited next to one another to form separate filament webs which are guided next to and parallel to one another. Narrower nonwoven webs can be produced even from very large production widths. For this purpose, the extrusion means and the pull-off means are disposed above the belt in such a manner that the filaments of the filament groups can be laid to form separate nonwoven webs.

Abstract: A device for melt spinning a linear filament bundle has a spinning shaft for mounting a longitudinal spinning nozzle group, having a nozzle plate including a plurality of nozzle openings on a bottom, and an inlet plate having at least one inlet channel on a top. A distribution chamber is provided between the inlet plate and the nozzle plate, which is connected to the inlet channel in the inlet plate and the nozzle openings in the nozzle plate. The inlet plate has multiple inlet channels provided at a distance to one another in longitudinal direction of the spinning shaft. Multiple distribution chambers arranged next to one another are provided in longitudinal direction of the spinning shaft. The inlet channels each end in one of the distribution chambers.

Abstract: A device and method for producing a spun-bonded non-woven. A molten polymer supplied to a spinning beam from a melt source is extruded through a multiplicity of linearly arranged spinneret bores into filaments arranged in the form of a curtain. A tensile force is exerted on the filaments by means of a draw-off nozzle. The filaments are thereupon deposited on to a conveyer belt where they form a spun-bonded non-woven. At the draw-off nozzle, a monitoring means is provided which detects a characteristic quantity characteristic of the process. One or more structure-borne sound sensors are preferably used as monitoring means. The measurement result of the monitoring means, after a desired value comparison, is supplied to a signal means or is used for regulating the process.

Abstract: A meltblown method for melt spinning fine non-woven fibers and a device for carrying out said method. According to the invention, a polymer melt is extruded, in order to form several fiber strands, through several nozzle bores of a spinning nozzle and twisted on the outlet side of the nozzle bores by means of a cold blow flow. According to the invention, the blow flow is fed to the fiber strands in an acceleration path wherein the fiber stands and the blow flow are accelerated in such a manner that the fiber strands are twisted in order to form continuous fine fibers. According to the inventive device, the inventive acceleration path is formed between the upper edges and the lower edges of the two blow nozzle openings below the spinning nozzle.

Abstract: A device and a method for the melt spinning and depositing of a plurality of tows (5.1, 5.2, . . . , 5.n) utilizes several spinning devices (1.1, 1.2, . . . , 1.n) by means of which one of the tows 5.1, 5.2, . . . , 5.n is produced from a filament bundle (4.1, 4.2, . . . , 4.n). Each spinning device (1.1, 2.2, . . . , 1.n) is associated with a respective drawing-off device and a respective can depositing device (3.1, 3.2, . . . , 3.n) so that each of the tows (5.1, 5.2, . . . , 5.n) can be deposited individually in a respective can (19.1, 19.2, . . . , 19.n).

Abstract: A spinning apparatus for extruding a group of filaments by means of an annular spinneret. An annular collection chamber is arranged upstream of the spinneret, which is provided with a plurality of nozzle bores. The collection chamber has an upper inlet area and a lower annular outlet area, which is connected to the upper inlet area. In the inlet area of the collection chamber a filter device is disposed, upstream of which is a melt feed. The inlet area of the collection chamber is formed by a plurality of filter chambers, which are each provided with a melt inlet and a melt outlet. The filter device has a plurality of substantially cylindrical filter elements, which are each provided with a powdered filter medium. One of these filter elements is assigned to each filter chamber. This ensures a large filtration area and deep bed filtration of the polymer melt.

Abstract: A device and a method for the melt spinning and depositing of a plurality of tows (5.1, 5.2, . . . , 5.n) utilizes several spinning devices (1.1, 1.2, . . . , 1.n) by means of which one of the tows 5.1, 5.2, . . . , 5.n is produced from a filament bundle (4.1, 4.2, . . . , 4.n). Each spinning device (1.1, 2.2, . . . , 1.n) is associated with a respective drawing-off device and a respective can depositing device (3.1, 3.2, . . . , 3.n) so that each of the tows (5.1, 5.2, . . . 5.n) can be deposited individually in a respective can (19.1, 19.2, . . . , 19.n).