Abstract: The needle board for use in a needling machine for needling a flat textile material comprises first needle rows and second needle rows, wherein the first needle rows and the second needle rows are arranged inclined with respect to a longitudinal direction of the needle board, which longitudinal direction corresponds to a direction in which the flat textile material to be needled is conveyed in the needling machine. The first needle rows are arranged at a first angle to the longitudinal direction, and the second needle rows are arranged at a second angle to the longitudinal direction. An absolute value of the second angle is different from an absolute value of the first angle.

Abstract: The device for conveying a fiber web comprises a transport device, which serves as a support for the fiber web, and which is driven by a drive in a transport direction at a speed of at least 50 m/min. The transport device has a rough surface and carries along the fiber web resting on the transport device by force of friction. An array of linear elements arranged above the transport device serves to cover the fiber web resting on the transport device. The linear elements have a smooth surface, and the fiber web is carried along the bottom surface of the linear elements. The linear elements are arranged next to each other but spaced apart in a direction transverse to the transport direction.

Abstract: A method for homogenizing the stitching pattern in a needled fleece requires a detector which is arranged between a first needling device and a second needling device and detects areas in the fleece where stitches are absent. Then the fleece needled by the first needling device is also needled in the second needling device, wherein at least one operating parameter or at least one structure parameter of the second needling device is adapted specifically on the basis of the result of the detection of the absent-stitch areas, so that, during the further needling of the fleece in the second needle machine, the absent-stitch areas are filled in a targeted manner.

Abstract: A method for actuating a needle bar in a needling machine includes the actuation of a first oscillating drive at a first frequency, the first oscillating drive having a main conrod connected directly or indirectly to the needle bar, and simultaneously the actuation of a second oscillating drive at a second frequency, the second oscillating drive having a secondary conrod connected directly or indirectly to the needle bar, the movements of the needle bar produced by the first and second oscillating drives being superimposed on each other and the second frequency being higher than the first frequency.

Abstract: A method for homogenizing the stitching pattern in a needled fleece requires a detector which is arranged between a first needling device and a second needling device and detects areas in the fleece where stitches are absent. Then the fleece needled by the first needling device is also needled in the second needling device, wherein at least one operating parameter or at least one structure parameter of the second needling device is adapted specifically on the basis of the result of the detection of the absent-stitch areas, so that, during the further needling of the fleece in the second needle machine, the absent-stitch areas are filled in a targeted manner.

Abstract: The feed device for supplying individualized fibers or fiber flocks to a transport device, which serves to transport the formed fleece or fiber flock mat onward, includes a plurality of feed segments arranged horizontally next to each other and a plurality of individually actuatable feed rollers, wherein a separate feed roller is assigned to each feed segment. In addition, at least one driven opening cylinder, which cooperates with each feed roller, is also provided.

Abstract: A method for homogenizing the stitching pattern in a needled fleece requires a detector which is arranged between a first needling device and a second needling device and detects areas in the fleece where stitches are absent. Then the fleece needled by the first needling device is also needled in the second needling device, wherein at least one operating parameter or at least one structure parameter of the second needling device is adapted specifically on the basis of the result of the detection of the absent-stitch areas, so that, during the further needling of the fleece in the second needle machine, the absent-stitch areas are filled in a targeted manner.

Abstract: A method for actuating a needle bar in a needling machine includes the actuation of a first oscillating drive at a first frequency, the first oscillating drive having a main conrod connected directly or indirectly to the needle bar, and simultaneously the actuation of a second oscillating drive at a second frequency, the second oscillating drive having a secondary conrod connected directly or indirectly to the needle bar, the movements of the needle bar produced by the first and second oscillating drives being superimposed on each other and the second frequency being higher than the first frequency.

Abstract: The device for producing a uniform or profiled fleece or a fiber flock mat includes a material dispensing device which produces a fleece and a transport device for the further transport of the fleece. The device also includes a measuring device to determine a transverse profile and a longitudinal profile of the fleece by measuring the mass per unit area of the fleece across its width, and a profile-changing device for supplying individualized fibers or fiber flocks to the fleece. A control unit controls the profile-changing device on the basis of the results of the measuring device in such a way that the profile-changing device supplies the individualized fibers or fiber flocks section by section in a targeted manner. Thus, depending on the purpose of the application, a uniform fleece or a fleece with a nonuniform transverse profile or longitudinal profile can be produced.

Abstract: The fleece layer for laying down a card web to form a fleece has a cross-lapping upper carriage, through which the card web is guided; a cross-lapping laying carriage, through which the card web coming from the upper carriage is guided and which serves to lay the card web down onto an output conveyor belt; and at least two card web conveyor belts for guiding the card web to the upper carriage and from there to the laying carriage. A cover belt is arranged to enclose the card web lying on the upper run of a first card web conveyor belt from above. The cover belt is smooth and is not moved when the card web is moved, thus serving as a stationary cover of the card web.

Abstract: The method for operating a fleece layer requires a fleece layer, to which the card web is supplied at variable card web infeed speed. To limit the amount of space required for the upper carriage at the rear of the machine, the average of the absolute values of the laying-carriage speed during the forward movement of the laying carriage in at least some laying cycles differs from the average of the absolute values of the laying-carriage speed during the return movement of the laying carriage, and the average of the absolute values of the laying-carriage speed in at least some laying cycles during the forward movement of the laying carriage differs from twice the average of the absolute values of the upper-carriage speed during the forward movement of the laying carriage.

Abstract: The fleece layer for laying down a card web to form a fleece has a cross-lapping upper carriage, through which the card web is guided; a cross-lapping laying carriage, through which the card web coming from the upper carriage is guided and which serves to lay the card web down onto an output conveyor belt, and at least two card web conveyor belts for guiding the card web to the upper carriage and from there to the laying carriage. An upper run of a first endless card web conveyor belt extends from the infeed area of the fleece layer to the upper carriage and serves as a support surface for the card web. A positionally variable pressing means is provided, which can be actuated to produce a variable card web buffer in the upper run of the first card web conveyor belt.

Abstract: A device for transferring nonwoven material from a fleece-laying machine to a consolidation device having an endless circulating output conveyor belt of the fleece-laying machine for accepting card webs which are laid on the output conveyor belt from above by the fleece-laying machine, the laid card webs forming the nonwoven material. A first drive unit drives the output conveyor belt at variable speed. In addition, a second drive unit for driving the output conveyor belt at an essentially constant speed is provided at a point which, relative to the first drive unit, is closer to the consolidation device. A hanging storage buffer of the output conveyor belt is thus formed in a section of the output conveyor belt located between the first drive unit and the second drive unit.

Abstract: The method for operating a fleece layer requires a fleece layer, to which the card web is supplied at variable card web infeed speed. To limit the amount of space required for the upper carriage at the rear of the machine, the average of the absolute values of the laying-carriage speed during the forward movement of the laying carriage in at least some laying cycles differs from the average of the absolute values of the laying-carriage speed during the return movement of the laying carriage, and the average of the absolute values of the laying-carriage speed in at least some laying cycles during the forward movement of the laying carriage differs from twice the average of the absolute values of the upper-carriage speed during the forward movement of the laying carriage.

Abstract: The fleece layer for laying down a card web to form a fleece has a cross-lapping upper carriage, through which the card web is guided; a cross-lapping laying carriage, through which the card web coming from the upper carriage is guided and which serves to lay the card web down onto an output conveyor belt; and at least two card web conveyor belts for guiding the card web to the upper carriage and from there to the laying carriage. A cover belt is arranged to enclose the card web lying on the upper run of a first card web conveyor belt from above. The cover belt is smooth and is not moved when the card web is moved, thus serving as a stationary cover of the card web.

Abstract: The fleece layer for laying down a card web to form a fleece has a cross-lapping upper carriage, through which the card web is guided; a cross-lapping laying carriage, through which the card web coming from the upper carriage is guided and which serves to lay the card web down onto an output conveyor belt, and at least two card web conveyor belts for guiding the card web to the upper carriage and from there to the laying carriage. An upper run of a first endless card web conveyor belt extends from the infeed area of the fleece layer to the upper carriage and serves as a support surface for the card web. A positionally variable pressing means is provided, which can be actuated to produce a variable card web buffer in the upper run of the first card web conveyor belt.

Abstract: The needle board for a needling machine has a base plate with a plurality of receptacles, and a plurality of needle modules. Each needle module has a carrier plate, which is equipped with a plurality of needles arranged in a predetermined pattern and which is inserted into one of the receptacles in the base plate in such a way that the needles project from the base plate.

Abstract: The drive and guide device for a needle bar of a needle loom having a machine stand includes a first crankshaft rotatably supported in the machine stand; a needle bar supported in the machine stand; a first connecting rod supported on a first cam of the first crankshaft and connected to the needle bar; and a guide device for guiding the needle bar along a path extending perpendicular to the needle-punching support surface. The first connecting rod and/or the guide device comprises a leaf spring, which is rigidly connected to the needle bar to transmit a drive or guide force. As a result, lubrication points on elements of the needle loom which move from place to place are eliminated.

Abstract: A device for needling a nonwoven web includes several needle looms arranged in series, each with at least one needle bar, a pair of infeed rollers, and a pair of outfeed rollers. The needle looms can move along a guide in the transport direction of the nonwoven web and can be locked in place at any desired distance from each other.

Abstract: A fleece-laying device for laying a fleece from a card web having a laying carriage movable above and transversely to an output conveyor belt, an upper carriage also movable transversely to the output conveyor belt, and a first card web conveyor belt and a second card web conveyor belt for guiding the card web via the upper carriage and the laying carriage into a laying nip formed in the laying carriage. The fleece-laying device includes a card web guiding area between the upper carriage and the laying carriage with two sections of the first and second card web conveyor belts holding the card web between them and being guided over at least one support roll mounted in a support carriage which is also movable transversely to the output conveyor belt.