Needle plate and method for filling needle plate

Abstract

A needle plate (10) for fastening to a needle beam (8) of a needling machine (2) for reinforcing a fiber web (4), the needle plate (10) comprising a carrier plate (26) having a receiving device (28) receiving a plurality of needle modules (14) arranged in a row. The needle plate (10) further comprises a fluid-activatable gripping device (30) configured to secure the plurality of needle modules (14) in the receiving means (28) at least in a first direction (Y).

Description

[0001] This application is a divisional application, and its original application is a Chinese application with application number 202211657965.9, application date December 22, 2022, and invention name “Needle plate and method for filling needle plate”. The Chinese application claims the European application with application number 21216867.8 and application date December 22, 2021 as priority. Technical Field

[0002] The invention relates to a needle board suitable for being fastened to a needle bar of a needle loom for consolidating a fibrous pile web and to a method for filling such a needle board. Background Art

[0003] In a needling machine, a fiber fleece web is usually fed at an inlet and conveyed in the needling machine to a needle zone in the conveying direction of the fiber fleece web. In the region of the needle zone, at least one needle beam is arranged, which has a needle plate fixed thereto, the needle plate being filled with needles for consolidating the fiber fleece web. The needles compact the fiber fleece web because the needles are driven at a high frequency to penetrate the fiber fleece web in a penetration direction and are drawn out of the fiber fleece web again. The manufactured product is a reinforced nonwoven fabric. A variety of needling machines are known to those skilled in the art, including double needling machines that utilize two needle beams for needling from above and below, or needling machines in which the needle beams move together with the fiber fleece web in the conveying direction of the fiber fleece web during the consolidation process.

[0004] There have been attempts to increase the density of the needles of the needle board and thus the needling density of the fiber fleece web in order to optimize the properties of the reinforced nonwoven. However, this increase in needle density is limited by production and assembly tolerances in terms of the size and position of the needles, needle board, down-holding plate and seaming plate and the resulting increased risk of collisions between the needles and the down-holding plate and seaming plate. The needles may break during the collision, which represents an unacceptable risk in many applications. Summary of the invention

[0005] The object of the present invention is to provide a needle board for a needling machine and a method for filling such a needle board, which enable the needle density to be increased.

[0006] According to one aspect of the invention, a needle board for reinforcing a fiber fleece web, which is fastened to a needle beam of a needle loom, has a carrier plate with a receiving device in which a plurality of needle modules in a row are received, wherein each of the plurality of needle modules has a plurality of needles. In addition, the needle board has a fluid-activatable clamping device, which is configured to fix the plurality of needle modules in the receiving device at least in a first direction.

[0007] In this way, a plurality of needle modules in the receiving device can be moved, freely positioned and aligned before the position of the needle modules is fixed. When aligning the needle modules, dimensional changes that occur can already be taken into account. In addition, needle modules with a small number of needle rows can be manufactured precisely and can therefore be positioned in an ideal individual manner. Despite the high density of needles on the needle board, any collisions with other parts of the needling machine (e.g., downward holding plates and seaming plates) can still be reliably avoided. The fluid-activatable clamping device is particularly suitable for fixing a plurality of needle modules, because it has a simple construction and is easy to activate and easy to integrate in the needle board.

[0008] The needle modules of the plurality of needle modules in the accommodating device are preferably arranged in a row one after another in a second direction. The second direction is preferably perpendicular to the first direction. Each needle module preferably has a module carrier and a plurality of needles, which are accommodated in the module carrier and are preferably fixedly connected to the module carrier. For example, the module carrier is formed of a plastic material, and the plurality of needles are respectively cast in the module carrier or insert-molded in the module carrier.

[0009] The plurality of needles of each needle module are preferably arranged in at least one row, wherein the needles of the at least one row preferably extend in a third direction perpendicular to the first direction and the second direction. In this case, the rows of needles are arranged one after the other in the third direction. Each needle module of the plurality of needle modules can have, for example, one to five rows of needles, preferably one to three rows of needles, more preferably exactly one row of needles. Thus, the rows of needles can be ideally aligned in a mutually independent manner, in particular with respect to the downward holding plate and the stitching plate, and the needle modules are easy to produce. Not all needle modules have to have the same number of rows of needles.

[0010] The first direction, the second direction and the third direction preferably define a Cartesian coordinate system. In a preferred embodiment, the first direction is substantially vertical, and the second direction and the third direction are substantially horizontal. Here, the second direction preferably extends parallel to the longitudinal direction of the needle board, which is parallel to the working width of the needle loom, and the third direction preferably extends perpendicular to the conveying direction of the fiber fleece web.

[0011] The needle board can also have a plurality of receiving devices, wherein the receiving devices are preferably arranged one behind the other in the third direction. In this case, a plurality of needle modules arranged in a row are received in each receiving device of the plurality of receiving devices. Thus, all features and advantages of the receiving device described above and below can therefore be applied in an analogous manner to the plurality of receiving devices, which is why no separate description is given.

[0012] Preferably, the clamping device is a pneumatically activatable clamping device. For example, the clamping device can be activated by compressed air, thereby achieving a particularly simple and cost-effective embodiment. However, it is also conceivable to use other gases, for example an embodiment of the clamping device is a hydraulically activatable clamping device, which is activated by a hydraulic fluid.

[0013] In a preferred embodiment, the clamping device is configured to generate a retaining force on the plurality of needle modules and / or the receiving device at least in a first direction. The retaining force fixes the needle module at least in the first direction and can act directly on the needle module and / or the receiving device. The clamping device particularly preferably fixes the plurality of needle modules in a form-fitting manner in the first direction and fixes them in the receiving device in a force-fitting manner in the second direction and / or in the third direction.

[0014] In order to allow the plurality of needle modules to be introduced into the receiving device and to move or align the needle modules in the receiving device in the second direction, it is advantageous to maintain a certain gap between the needle module, in particular the module carrier, and the receiving device. Since the holding force is applied by means of the clamping device, the plurality of needle modules are fixed at least in the first direction in this case, for example by a form fit between a part of the receiving device and a component of the needle board or the carrier plate, respectively. In addition, the holding force can be sufficient to achieve a force fit or a friction fit between the needle module and the receiving device, respectively, so that the needle module is also fixed in the second direction and in the third direction.

[0015] The clamping device is adjustable between an active state and an inactive state. In the inactive state of the clamping device, the plurality of needle modules are preferably movable so that the needle modules can be introduced and retracted, and in the active state of the clamping device, the plurality of needle modules are fixed in the receiving device.

[0016] In an embodiment, the clamping device comprises at least one clamping element having a first state and a second state, in which the plurality of needle modules are movable in the accommodating device, and in which the at least one clamping element is expanded compared to the first state and fixes the plurality of needle modules in the accommodating device. The first state of the clamping element may correspond to an inactive state of the clamping device, and the second state of the clamping element may correspond to an active state of the clamping device. In this way, the clamping device is configured to be as simple as possible and without any complex mechanism. In the second state, the at least one clamping element generates a retaining force.

[0017] The clamping device can be activated in that the at least one clamping element is vented in a first state and pressure-impacted in a second state. The pressure-impacting of the at least one clamping element can be achieved by supplying a fluid, in particular by compressed air. Therefore, the at least one clamping element is preferably connectable to a fluid source, such as a pump. For this purpose, the at least one clamping element can have at least one connector and / or valve.

[0018] Preferably, at least one clamping element is configured to maintain the second state autonomously. This is possible because the at least one clamping element has a non-return valve which enables the supply of fluid into the clamping element and prevents the fluid from automatically draining out of the clamping element. In this way, a constant supply of fluid is not required, so that the needle board can be used flexibly and does not need to be connected to a fluid supply device, in particular during operation of the needling machine.

[0019] A particularly simple design of the at least one clamping element is possible when the at least one clamping element is designed as a hose, in particular a compressed air hose. The hose forms a fluid line for distributing a fluid in the needle board for activating the clamping device in a simple manner, can be easily installed in the needle board and provides a uniform pressure distribution to a plurality of needle modules or receiving devices in the second state, thereby serving as a clamping element of the clamping device.

[0020] In order to enable the at least one clamping element to act evenly on a plurality of needle modules or accommodating devices, the at least one clamping element preferably extends parallel to the second direction. The at least one clamping element can extend along the entire accommodating device in the second direction. However, it is also conceivable that a plurality of clamping elements are arranged one after another in the second direction.

[0021] Since at least one clamping element is accommodated in the accommodating device, a space-saving structure and an ideal direct force can be achieved. In the case of multiple accommodating devices, at least one clamping element is preferably accommodated in each accommodating device. When two clamping elements (e.g. two hoses) are accommodated in the accommodating device, uniform force transmission between the needle module and the accommodating device can be achieved and jamming can be avoided. In this case, the two clamping elements are preferably arranged symmetrically with respect to the multiple needle modules, for example symmetrically with respect to the center or symmetry plane of the needle module, and the plane is defined as being parallel to the first direction and the second direction.

[0022] In a preferred exemplary embodiment, the receiving device is mounted to be movable in a first direction relative to the carrier plate and can be moved between a release position and a clamping position by a clamping device. The travel length of the receiving device between the release position and the clamping position can be 1 to 5 mm, preferably 1 to 2 mm.

[0023] When at least one clamping element is in the first state, the receiving device is in the released position. When at least one clamping element is in the second state, the receiving device is in the clamped position. In the released position, there can be sufficient clearance between the plurality of needle modules and the receiving device so that the needle modules can be moved in the receiving device. By activating the clamping device, in particular by switching at least one clamping element into the second state, the receiving device can be moved into the clamped position, so that the clearance between the plurality of needle modules and the receiving device begins to decrease and eventually disappears. In this case, the plurality of needle modules are fixed in a form-fitting manner in the first direction.

[0024] For example, the needle board can have a carrier element, which is fixedly connected to the carrier board and is at least partially accommodated in the receiving device. The carrier element has a carrier surface on the side facing away from the carrier board, which can carry the upper side of a plurality of needle modules. On the lower side of the needle module opposite to the upper side of the needle module, the needles protrude from the corresponding module carrier. In this case, a plurality of needle modules are accommodated between the carrier element and the receiving device in a first direction.

[0025] The carrier element can have at least one notch extending parallel to the second direction. The at least one notch can form a cavity in the carrier element or between the carrier element and the carrier plate and is used to accommodate at least one clamping element. Preferably, the carrier element has two notches aligned in a mutually opposite manner and extending parallel to the second direction. The notches are arranged on the front side and the rear side of the carrier element in the third direction.

[0026] In a preferred embodiment, the first part of the receiving device extends into a cavity formed by the at least one notch. The at least one clamping element is accommodated between the at least one notch and the first part of the receiving device. When the at least one clamping element is switched to the second state, the clamping element moves the first part in the direction towards the carrier plate and thereby moves the receiving device. Thus, the plurality of needle modules are pressed against the carrier element.

[0027] Preferably, the accommodating device comprises a first accommodating element and a second accommodating element which are opposite to each other in a first direction, and between which a clamping device and a plurality of needle modules are accommodated, wherein the needles of the plurality of needle modules extend out of the accommodating device, preferably between the first accommodating element and the second accommodating element. The longitudinal direction of the first accommodating element and the second accommodating element is preferably parallel to the second direction, and the first accommodating element and the second accommodating element form a guide for the needle module, which extends parallel to the second direction. In this way, the accommodating device has an ideal simple construction, while the needle module is reliably accommodated and can be moved parallel to the second direction at the same time. The first accommodating element and the second accommodating element preferably extend across the entire width of the accommodating device in the second direction. However, it is also conceivable that a plurality of first accommodating elements and / or second accommodating elements are arranged one after another in the second direction. For example, the first accommodating element and the second accommodating element can be formed by a metal plate, in particular a steel plate.

[0028] The first accommodating element and the second accommodating element are configured to support the plurality of needle modules. The first accommodating element and the second accommodating element can jointly form a guide for moving the plurality of needle modules parallel to the second direction. To this end, each of the two accommodating elements particularly includes a supporting portion that carries the peripheral area of ​​the module carrier of the plurality of needle modules. More specifically, each module carrier includes a first peripheral area and a second peripheral area opposite to the first peripheral area, wherein at least one needle row of the corresponding needle module extends from the first peripheral area to the second peripheral area. In this case, the first peripheral area can be carried on the supporting portion of the first accommodating element, and the second peripheral area can be carried on the supporting portion of the second accommodating element.

[0029] In a preferred embodiment, the first accommodation element and the second accommodation element are each configured to be approximately C-shaped. In this case, the first accommodation element and the second accommodation element each have three legs, wherein the first leg extends parallel to the carrier plate, the second leg at the end of the first leg extends perpendicular to the carrier plate, and the third leg extends parallel to the carrier plate at the end of the second leg opposite the first leg. Preferably, the third leg of the first accommodation element and the second accommodation element forms a support portion of the respective accommodation element. The first leg of the first accommodation element and the first leg of the second accommodation element can together form a first part of the accommodation device, which first part is arranged in a cavity formed by at least one notch of the carrier element. In this case, at least one clamping element is arranged between the first leg of the first accommodation element and / or the second accommodation element and the carrier element.

[0030] The clamping device can act directly on the plurality of needle modules or on the receiving device, in particular when the receiving device is mounted so as to be movable relative to the carrier plate.

[0031] In all embodiments, the needle board can also include a fluid-activatable release device, which is configured to generate a reaction force in the direction opposite to the holding force, thereby releasing the plurality of needle modules in the receiving device. It may also be the case that the at least one clamping element (e.g. in the form of a hose) cannot be switched back to the first state in a simple manner, for example due to incomplete or delayed venting, elasticity of the material of the at least one clamping element and / or elastic pretensioning. This is counteracted by the reaction force, so that the plurality of needle modules can be inserted or removed in an ideally simple manner.

[0032] In one embodiment, the clamping device acts on the receiving device and the receiving device is mounted so as to be movable relative to the carrier plate, the release device preferably transmitting the reaction force to the receiving device.

[0033] In order to achieve a simple and economical structure, the release device preferably includes at least one pressure element. At least one pressure element can be configured in a manner similar to at least one clamping element (for example, respectively with respect to the embodiment or structure of at least one clamping element, the activation and number of the pressure element), so that the features described with reference to the clamping element can be applied to the at least one pressure element in a similar manner. The number of pressure elements preferably corresponds to the number of clamping elements, and each clamping element is assigned a pressure element to offset the clamping element. Therefore, preferably, two pressure elements are also provided for each accommodating device, and the pressure elements are arranged to be symmetrical with respect to the accommodating device or symmetrical with respect to a plurality of needle modules, respectively.

[0034] The at least one pressure element can also have a first state and a second state, wherein the at least one pressure element in the second state is expanded compared to the first state. It is particularly suitable for this purpose to configure the at least one pressure element as a hose, in particular a compressed air hose. In the first state, the at least one pressure element substantially does not generate a reaction force, while in the second state, the pressure element generates a reaction force and releases a plurality of needle modules in the receiving device.

[0035] In a preferred embodiment, the needle board comprises a plurality of layers arranged one above the other, wherein the carrier plate forms a first layer of the plurality of layers. The plurality of layers are preferably arranged one above the other in a first direction.

[0036] Furthermore, the plurality of layers can include a further plate, which forms a second layer of the plurality of layers, wherein the further plate and the carrier plate are arranged spaced apart from each other. The further plate is preferably arranged above the carrier plate in the first direction. The thickness of the carrier plate and the further plate in the first direction can be 5 mm to 10 mm, preferably 6 mm to 8 mm.

[0037] Preferably, at least one pressure element is arranged outside the receiving device. In this embodiment, the at least one pressure element can be received between two of the multiple layers of the needle board, for example between the carrier plate and the further plate. In this case, the further plate serves as a counter-carrier for the at least one pressure element, so that the reaction force acting on the receiving device by the pressure element is applied to the target in the first direction.

[0038] Despite the multi-layer structure of the needle board, the weight and dimensions of the needle board should be kept as small as possible. It is therefore preferred that the carrier plate and / or the further plate is formed from a fiber-reinforced material.

[0039] In order to arrange the carrier plate and the further plate at a defined mutual spacing, the plurality of layers preferably further comprises a third layer formed by at least one spacing element. The at least one spacing element is arranged between the carrier plate and the further plate in the first direction. Preferably, a plurality of spacing elements are provided, each of which extends parallel to the second direction and is spaced apart from one another in the third direction. Thus, an intermediate space is respectively arranged between two adjacent spacing elements of the plurality of spacing elements, the intermediate space towards the top being defined by the further plate, and the pressure element can be accommodated in the intermediate space.

[0040] The at least one spacing element can be configured, for example, as a strip or a flat profile, preferably made of aluminum.The at least one spacing element can have a thickness in the first direction of 3 mm to 8 mm, preferably 5 mm to 6 mm.

[0041] It is also conceivable that, instead of a plurality of spacer elements, at least one spacer element is configured substantially in the form of a plate and comprises at least one recess for forming a cavity for accommodating at least one pressure element.

[0042] Preferably, in the first direction, one pressure element is arranged above each clamping element. Typically, the release device can include at least one transmission element, wherein the at least one pressure element transmits the reaction force via the at least one transmission element, preferably to the receiving device. The at least one transmission element can be configured, for example, as a pin or a bolt. Preferably, each pressure element is assigned a plurality of transmission elements, wherein the transmission elements assigned to the same pressure element are arranged one after the other in the second direction. The carrier plate can include a plurality of through holes, the number of which corresponds to the number of transmission elements, and the transmission elements are received in the through holes.

[0043] At least one transmission element preferably extends from at least one pressure element through a through hole in the carrier plate to the receiving device, in particular to the first part of the receiving device or to the first leg of the first receiving element or the second receiving element, respectively. In this way, the release device can exert a reaction force on the upper side of the first part of the receiving device, and the clamping device can exert a holding force on the lower side of the first part of the receiving device.

[0044] During operation, the penetration direction of the plurality of needle modules into the fluff to be reinforced is substantially parallel to the first direction. Therefore, the acceleration acting on the plurality of needle modules is substantially parallel to the first direction. The plurality of needle modules are fixed in the first direction by a clamping device, in particular in a form-fitting manner between the first and second accommodating elements and the carrier plate or the carrier element. The needle modules of the plurality of needle modules are substantially movable relative to each other in the second direction, and the retaining force may be sufficient to fix the plurality of needle modules in the second direction in a force-fitting manner. The plurality of needle modules can also be fixed accordingly in a third direction in a force-fitting manner.

[0045] However, in many applications, when the fiber fleece web is combined with the needle board, it is also desirable to move the needle board together with the fiber fleece web in the conveying direction. In this process, a movement component parallel to the third direction is also applied to the needle board during the swinging movement. In this case, the acceleration forces can overcome the holding forces of the needle module or the holding forces of the receiving device, in particular deformations of the first receiving element and the second receiving element.

[0046] Therefore, in all embodiments of the invention, the needle board can have a bracing means, which is configured to exert an interlocking force on the receiving device at least in the third direction. The interlocking force in turn can be used to fix the plurality of needle modules in the receiving device in a form-fitting manner in the third direction. Additionally or alternatively, the interlocking force can fix the plurality of modules in a force-fitting manner. Therefore, the bracing means can ensure that the plurality of needle modules in the receiving device are fixed in the third direction, even under accelerated conditions.

[0047] The interlocking force can be conceived in such a way that it causes the accommodating device, in particular the first accommodating element and / or the second accommodating element, to deform in the direction of the module carrier of the multiple needle modules, thereby fixing the multiple needle modules in a third direction, preferably between the first accommodating element and the second accommodating element in a shape-fitting manner.

[0048] The support means can comprise at least one support element starting from the foot portion, which support element is configured to taper in the direction towards the carrying plate. The at least one support element can be configured, for example, in the form of a strip extending parallel to the second direction.

[0049] Preferably, in the first direction, the foot portion of the at least one support element is arranged below the third leg of the first and / or second receiving element and comprises a bearing area for the third leg. Starting from the foot portion, the at least one support element extends at least partially along the second leg of the respective receiving element. The position of the at least one support element relative to the carrier plate may be adjustable, for example by a threaded connection between the support element and the needle plate.

[0050] The at least one supporting element is initially spaced apart from the carrier plate, the spacing enabling the accommodation device to be arranged in the release position. When the accommodation device is subsequently switched to the clamping position, the at least one supporting element is movable in the direction of the carrier plate parallel to the first direction. Due to the at least one supporting element being configured to taper, the first accommodation element and / or the second accommodation element gradually deform in a third direction towards the plurality of needle modules. The interlocking force acts substantially on the second leg of the first accommodation element or the second accommodation element, respectively.

[0051] If a plurality of accommodating devices are provided, a supporting element is preferably arranged respectively between two adjacent accommodating devices. In this case, each supporting element can engage with the second accommodating element of the accommodating device below the first accommodating element of the adjacent accommodating device, and the accommodating elements are supported mutually.

[0052] As an alternative to each supporting element, a fluid-activatable clamping device can also be used inside or outside the corresponding receiving device, which is constructed in a manner similar to the aforementioned clamping element, extends in a first direction and a second direction, and applies a clamping force to the needle module in a third direction.

[0053] According to another aspect of the invention, a needle loom for needle-punching a nonwoven web comprises a needle bar assembly comprising a needle bar and at least one needle board fastened to the needle bar, wherein the needle board has a structure as described above. In this way a needle loom is provided which is suitable for very high needle densities without increasing the risk of the needles colliding with a downward holding plate or a seaming plate of the needle loom.

[0054] Preferably, the needle loom has a first main shaft, on which a first main connecting rod is mounted off-center, the first main connecting rod connecting the first main shaft to the needle beam assembly in an articulated manner, thereby enabling an oscillating movement of the needle beam assembly in a penetration direction, wherein the penetration direction is preferably parallel to the first direction.

[0055] In order to achieve a substantially elliptical movement path of the needle beam assembly, the needle loom can also have a second main shaft on which a second main connecting rod is mounted off-center, the second main connecting rod connecting the second main shaft to the needle beam assembly in an articulated manner. Preferably, the first main shaft and the second main shaft rotate in opposite directions.

[0056] The fiber fleece web to be consolidated is moved through the needling machine in a conveying direction substantially parallel to the third direction. Preferably, the fiber fleece web is accommodated in the region of the needle beam assembly between a downward holding plate and a stitching plate of the needling machine, said plates being arranged above or below the fiber fleece web, respectively, and having openings for the entry or passage of the needles of the plurality of needle modules.

[0057] In the case of a high needle density, the downward holding plate can in particular be configured as a wire plate comprising a plurality of fixed wires extending parallel to the conveying direction. The wires are arranged spaced apart from one another in the second direction. Preferably, during operation of the needling machine, a needle row of the plurality of needle modules passes between two adjacent wires and into the fiber fleece web. Therefore, the positioning of the needle modules in the second direction must be such that the needle rows are arranged between the wires to avoid collisions.

[0058] Preferably, the at least one needle board is releasably connected to the needle bar, so that the needling machine can be equipped with different needle boards or so that the at least one needle board can be filled with the plurality of needle modules in a simple manner outside the needling machine.

[0059] In a preferred embodiment, the needling machine comprises a further fluid-activatable clamping device configured to fasten the at least one needle board to the needle beam. This makes the assembly of the needle board simple and reliable.

[0060] To make the difference more obvious, the clamping device for fixing the plurality of needle modules to the needle board in the accommodating device is also referred to herein as first clamping device, while the clamping device of the needling machine for fastening the needle board to the needle beam is also referred to as second clamping device.

[0061] The second clamping device can likewise be a pneumatically activatable clamping device and comprises at least one second clamping element, preferably in the form of a hose, which can be adjusted between a first state and a second state. Thus, the features of the first clamping device can essentially be applied to the second clamping device in a similar manner. In particular, the at least one second clamping element extends parallel to the second direction.

[0062] In a preferred embodiment, the needle beam comprises a front shoulder and a rear shoulder. The front shoulder faces forward in the conveying direction. The rear shoulder faces rearward in the conveying direction. The second clamping elements of the second clamping device are respectively arranged on the upper side of the front shoulder and the upper side of the rear shoulder away from the needle board.

[0063] Furthermore, a clamping angle is provided, more specifically a front clamping angle and a rear clamping angle, respectively. Preferably, the front clamping angle and the rear clamping angle respectively comprise a first leg, a second leg and a third leg, the first leg being arranged essentially parallel to the needle board and arranged above the respective second clamping element; the second leg extending downwards from the first leg beside the needle beam; the third leg extending parallel to the first leg in the direction of the needle board and engaging with the needle board. Thus, the at least one second clamping element is accommodated between a front shoulder and / or a rear shoulder of the needle beam and the first leg of the front clamping angle and / or the rear clamping angle.

[0064] If the needle board comprises a plurality of layers, a notch is preferably arranged between two layers of the plurality of layers, in which notch the third leg engages. For example, the notch is arranged between the carrier plate and the further plate of the needle board. This can be achieved because the at least one spacing element has a smaller width in the third direction than the further plate.

[0065] When the clamping element of the second clamping device is in the first state, the needle board can be released from or attached to the needle beam.When the clamping element of the second clamping device is in the second state, the needle board is pulled upwards by the clamping angle and pressed against the needle beam and fixed on the needle beam.

[0066] According to another aspect of the invention, there is provided a method for filling a needle board, the needle board being fastened to a needle beam of a needling machine, the method comprising the following steps:

[0067] - inserting a plurality of needle modules into a receiving device of a carrier plate attached to a needle board, wherein the needles of the plurality of needle modules extend in a first direction, and the needle modules of the plurality of needle modules in the receiving device are arranged one after the other and are movable relative to each other in a second direction perpendicular to the first direction;

[0068] - generating a relative movement between the needle plate and the adjusting device, wherein the adjusting device comprises a plurality of adjusting elements which are arranged parallel to each other and extend in a third direction perpendicular to the first direction and the second direction;

[0069] - Aligning a plurality of needles with a plurality of adjustment elements by relative movement between the needle plate and the adjustment device;

[0070] After alignment, the plurality of needle modules are fixed in the receiving device by means of a fluid-activatable clamping device.

[0071] In this way, the produced needle modules can be aligned precisely while taking into account dimensional variations, so that collisions during operation are avoided, as has already been described in the context of the needle board.

[0072] Preferably, the method is dedicated to filling a needle board having the above-described structure. Therefore, all features and advantages described with reference to the needle board can be applied in an analogous manner to the method and vice versa.

[0073] The filling of the needle board can take place outside the needling machine, in the adjustment device, wherein the needle board and the needle module are particularly easily accessible. In this case, the plurality of adjustment elements is preferably configured to correspond to the downward holding plate, in particular designed as a thread plate. In this case, the plurality of adjustment elements can be formed by a plurality of threads. However, it is also conceivable that the needle board is installed in the needling machine, wherein the adjustment device can be formed by the downward holding plate.

[0074] The plurality of needle modules are inserted into a receiving device, and the receiving device is initially movable in a second direction. Preferably, the relative movement occurs in parallel to the longitudinal direction of the needle or in parallel to the penetration direction of the needle, respectively, which may correspond to the first direction. In the relative movement between the needle plate and the adjusting device, the needles of the needle modules that are not correctly aligned can contact the corresponding adjusting elements adjacent thereto. Since the plurality of adjusting elements are arranged to be stationary, the corresponding needle modules are displaced in the second direction during the relative movement until the adjusting elements and the needle modules no longer collide with each other during the next stroke in the penetration direction. In this case, each row of needles is preferably arranged between two adjacent adjusting elements. The plurality of needle modules are now correctly aligned and can be fixed. The relative movement may also have a component in the second direction and / or the third direction. For example, the needles of the plurality of needle modules can be initially arranged between the adjusting elements, and then the needle plate or the adjusting device can be agitated to achieve the distribution and alignment of the plurality of needle modules.

[0075] Preferably, the step of fixing the plurality of needle modules comprises the following steps:

[0076] - generating a retaining force in a first direction on the plurality of needle modules and / or on the receiving device by means of the clamping device; and

[0077] The plurality of needle modules are fixed in a first direction in a form-fitting manner by the retaining force and in a second direction and preferably in a third direction in a force-fitting manner.

[0078] If the filling of the needle board takes place outside the needling machine, the needle board can be inserted into the needling machine after the plurality of needle modules have been filled and after the plurality of needle modules have been fixed.The needle board in the needling machine is preferably fixed to the needle beam by a second clamping device.

[0079] Since the clamping elements of the first clamping device are preferably maintained autonomously in the second state, they can be disconnected from a suitable fluid supply after the needle modules have been fixed, allowing unimpeded operation of the needle board in the filled state.

[0080] If the needle board comprises a supporting device as described above, the method can further comprise activating the supporting device after the plurality of needle modules have been fixed by means of the first clamping device in order to also clamp the plurality of needle modules in a form-fitting manner in the third direction. The activation of the supporting device preferably comprises a movement of the at least one supporting element in the direction of the carrier board, thereby causing a deformation of the at least one receiving element of the receiving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1 A schematic diagram of a needling machine is shown;

[0082] Figure 2 shows a cross-sectional view of a needle beam assembly having a needle plate according to an embodiment of the present invention;

[0083] Figure 3 The enlarged view shows Figure 2 a portion of the cross-sectional view shown;

[0084] Figure 4 The enlarged view shows Figure 2 a cross-sectional view of another cross section of the needle beam assembly shown; and

[0085] Figure 5 An adjustment device for aligning a plurality of needle modules of a needle board is schematically shown. DETAILED DESCRIPTION

[0086] Figure 1 The basic structure of a needling machine 2 is schematically shown. The needling machine 2 is used to consolidate a fiber fleece web 4, which is fed to the needling machine 2 along a conveying direction F and passes through the needling machine 2 in the conveying direction F. The needling machine 2 comprises a needle bar assembly 6, which has a needle bar 8 and at least one needle board 10, which is releasably fastened to the needle bar 8. The needle board 10 has a plurality of needles 12, which are components of a plurality of needle modules 14, such as Figures 2 to 5 Shown in detail.

[0087] In order to consolidate the fiber fleece 4 , the needles 12 are moved up and down in an oscillating manner along a penetration direction E and penetrate into the fiber fleece 4 in the process. Preferably, the penetration direction E is substantially perpendicular to the conveying direction F.

[0088] In order to penetrate the fiber fleece web 4 as deeply as possible, or optionally penetrate the fiber fleece web 4, the needling machine 2 in the needle zone 16 can have a stitching plate 18, and the needle beam assembly 6 is also arranged in the needle zone 16. The stitching plate 18 assists the fiber fleece web 4 in the needle zone 16 and has an opening, and the needle tips of the needles 12 can enter the opening, thereby penetrating the fiber fleece web 4. In order to bring out as few fibers as possible (if any) from the fiber fleece web 4 when the needles 12 are pulled out of the fiber fleece web 4, the needling machine 2 also includes a downward holding plate 20 in the needle zone 16. The downward holding plate 20 is arranged above the fiber fleece web 4 and retains the fiber fleece web 4, especially its fibers, when the needles 12 are pulled out. The downward holding plate 20 has an opening through which the needles 12 can pass.

[0089] In the case of high needle density, since the pitch of the needles 12 is very small, it is difficult to provide a corresponding number of openings and to align the openings with the needles accurately, so the stitching plate 18 and the downward holding plate 20 can be configured as a line plate. Each line plate includes a plurality of fixed lines, and the plurality of fixed lines are aligned parallel to the conveying direction F. The lines in the plurality of lines are arranged spaced apart from each other in a direction perpendicular to the conveying direction F and the penetration direction E, so that the needles 12 can pass through. For example, a row of needles 12 arranged parallel to the third direction can pass between two adjacent lines, respectively.

[0090] The needle loom 2 also has a first main shaft 22, and a first main connecting rod 24 is mounted off-center on the first main shaft 22. The first main connecting rod 24 connects the first main shaft 22 to the needle beam assembly 6 in an articulated manner. In addition, in many applications, the needle loom 2 includes a second main shaft and a second main connecting rod, which are configured in a manner similar to the first main shaft 22 and the first main connecting rod 22.

[0091] also, Figure 1 , a Cartesian coordinate system is also shown, which has a first direction Y, a second direction Z and a third direction X. The first direction Y is preferably substantially vertical, and the second direction Y and the third direction X are substantially horizontal. The conveying direction F is preferably parallel to the third direction X, and the penetration direction E is preferably parallel to the first direction Y.

[0092] exist Figure 2The needle beam assembly 6 with the needle beam 8 and the needle board 10 is shown in more detail in a sectional view of , wherein the sectional plane is defined by the first direction Y and the third direction X. The needle board 10 comprises a carrier plate 26 having at least one receiving device 28, in which a plurality of needle modules 14 are received. In the illustrated embodiment, five receiving devices 28 are provided, which are arranged side by side with one another in the third direction X, each of the five receiving devices 28 receiving a plurality of needle modules 14. The receiving devices 28 are constructed in a similar manner, which is why only one receiving device 28 is described in detail, the features of a single receiving device 28 being applicable in a similar manner to any number of receiving devices 28.

[0093] The needle board 10 further comprises a fluid activatable clamping device 30, which is also referred to as a first clamping device 30 and preferably has at least one first clamping element 32, here two first clamping elements 32a, 32b. Figure 3 and Figure 4 The first clamping device 30 and its mode of functioning are described in more detail.

[0094] The needle beam assembly 6 can include a second fluid-activatable clamping device 34, which can have at least one second clamping element 36, and here has two second clamping elements 36a, 36b. The second clamping device 34 is used to fasten the needle board 10 to the needle beam 8. To this end, the needle beam 8 can have a front shoulder 38 and a rear shoulder 40, which protrude forwards or backwards from the needle beam 8 in the conveying direction F, respectively. The second clamping elements 36a, 36b are arranged on the shoulders 38, 40, respectively, and extend parallel to the second direction Z.

[0095] The second clamping device 34 in this exemplary embodiment also comprises a rear first clamping angle 42 and a front second clamping angle 44. The first clamping angle and the second clamping angle 42, 44 clamp the needle board 10 to the needle beam 8. To this end, each of the two clamping angles 42, 44 has a first leg 42a, 44a, a second leg 42b, 44b and a third leg 42c, 44c, wherein the first leg 42a, 44a extends so as to be substantially horizontal and above the respective shoulder 38, 40, the second leg 42b, 44b extends from the first leg 42a, 44a in a substantially vertical downward manner beside the respective shoulder 38, 40, and the third leg 42c, 44c extends from the second leg 42b, 44b so as to be substantially horizontal in the direction of the needle board 10. The third legs 42c, 44c engage with the needle board 10, wherein they extend into a notch 46 which is provided on the needle board 10 and is also referred to as a needle board notch.

[0096] The second clamping elements 36a, 36b are preferably adjustable between a first state and a second state, wherein the second clamping elements 36a, 36b are expanded in the second state compared to the first state. If the second clamping device 34 is configured as a pneumatically activatable clamping device 34, the second clamping elements 36a, 36b can be configured as a hose, in particular a pneumatically activatable pressure hose. When the second clamping elements 36a, 36b are in the first state, the first and second clamping angles 42, 44 are lowered and the needle board 10 can be pushed in or out parallel to the second direction Z. When the second clamping elements 36a, 36b are in the expanded second state, the first and second clamping angles 42, 44 are lifted by the clamping elements parallel to the first direction Y and the needle board 10 is pressed against the needle beam 8. In this way, the needle board 10 is fixedly attached to the needle beam 8.

[0097] In the following we will refer to Figures 2 to 4 The needle plate 10 will be described in more detail.

[0098] The plurality of needle modules 14 in the accommodating device 28 are arranged one after another in the second direction Z. Each needle module 14 has a module carrier 48 in which the needles 12 of the needle module 14 are accommodated. Each needle module 14 preferably has only one row of needles 12, wherein the needles 12 are arranged in a row one after another in the third direction X. The plurality of needle modules 14 are accommodated in the accommodating device 28 such that the longitudinal direction of the needles 12 extends parallel to the penetration direction E.

[0099] The accommodating device 28 is configured such that a needle module 14 of the plurality of needle modules 14 can be respectively inserted or pushed into the accommodating device 28, can be displaced in the accommodating device 28 parallel to the second direction Z, and is held by the accommodating device 28. The accommodating device 28 can include a first accommodating element 50 and a second accommodating element 52, the longitudinal directions of which preferably extend parallel to the second direction Z. The first accommodating element 50 and the second accommodating element 50, 52 are opposite to each other in the third direction and accommodate the plurality of needle modules 14 therebetween, wherein the needles 12 between the first accommodating element 50 and the second accommodating element 50, 52 extend beyond the accommodating device 28.

[0100] In order to support a plurality of needle modules 14, each receiving element 50, 52 comprises a supporting portion 54, 56 on which the peripheral regions 48a, 48b of the module carrier 48 are respectively carried. The first peripheral region 48a and the second peripheral region 48b of each module carrier 48 are opposite to each other, and at least one row of needles of the corresponding needle module 14 extends between the first peripheral region and the second peripheral region 48a, 48b.

[0101] As shown, the first and second accommodating elements 50, 52 can be configured to have a substantially C-shaped shape. Therefore, the first and second accommodating elements 50, 52 have first legs 50a, 52a, second legs 50b, 52b and third legs 50c, 52c, respectively. The first legs 50a, 52a and the third legs 50c, 52c are arranged parallel to each other, and the second legs 50b, 52b extend substantially perpendicularly to the first and third legs, thereby being located between the first and third legs. The third legs 50c, 52c of the first and second accommodating elements 50, 52 can form respective support portions 54, 56, respectively, on which the module carrier 48 is carried.

[0102] Needle board 10 can further comprise a carrier element 58 which is fixedly connected (eg screwed) to carrier plate 26. Carrier element 58 has a carrier surface 60 on its side facing away from carrier plate 26, on which the upper sides of a plurality of needle modules 14 can be supported.

[0103] In order to fix a plurality of needle modules 14 in the accommodating device 28, the accommodating device 28 can be mounted to be movable in the first direction Y relative to the carrier plate 26. For example, the carrier element 58 has two notches 62, 64, which are aligned in a mutually opposite manner and extend parallel to the second direction, specifically a rear notch 62 and a front notch 64. The notches 62, 64 form a cavity between the carrier element 58 and the carrier plate 26, and the first part of the accommodating device 28 can extend into the cavity. For example, the first part of the accommodating device 28 is formed by the first legs 50a, 52a of the first and second accommodating elements 50, 52. In this way, the first part of the accommodating device 28 can move up and down between the carrier element 58 and the carrier plate 26, and at the same time, it is tightly fastened to the carrier plate 26 along the first direction Y.

[0104] The first clamping device 30 is configured to fix the plurality of needle modules 14 in the receiving device 28 at least in the first direction Y, in particular in view of the fact that the first clamping device 30 exerts a retaining force on the plurality of needle modules 14 and / or the receiving device 28 in the first direction Y. Thus, the first clamping device 30 fixes the plurality of needle modules 14 in a form-fitting manner in the first direction Y and in a force-fitting manner in the second and third directions.

[0105] The first clamping device 30 is preferably adjustable between an activated state and an inactivated state. To this end, the first clamping element and the second clamping element 32a, 32b can have a first state and a second state, in which the plurality of needle modules 14 are movable in the accommodating device 28, and in which the first clamping element and the second clamping element 32a, 32b are expanded compared to the first state and fix the plurality of needle modules 14 in the accommodating device 28. The first clamping element and the second clamping element 32a, 32b preferably extend parallel to the second direction Z.

[0106] Preferably, the first clamping device 30 is configured as a pneumatically activatable clamping device, wherein the first and second clamping elements 32a, 32b are respectively formed by hoses. The clamping device 30 is activated by supplying air, wherein the first and second clamping elements 32a, 32b are switched from a first state to a second state.

[0107] Preferably, the first and second clamping elements 32a, 32b are accommodated in the accommodation device 28. The clamping elements 32a, 32b in the illustrated embodiment are accommodated in the cavity formed by the notches 62, 64 between the carrier element 58 and the carrier plate 26. More specifically, the first clamping element 32a is arranged on the rear notch 62 of the carrier element 58 and is accommodated between the carrier element 58 and the first leg 50a of the first accommodation element 50. The second clamping element 32b is arranged on the front notch 64 of the carrier element 58 and is accommodated between the carrier element 58 and the first leg 52a of the second accommodation element 52.

[0108] When the first and second clamping elements 32a, 32b are switched to the second state, the clamping elements 32a, 32b move the first legs 50a, 52a of the receiving elements 50, 52 upwardly parallel to the first direction Y because the notches 62, 64 of the carrier element 58 are fixed.

[0109] Figure 3 and Figure 4 , the clamping elements 32a, 32b are shown in the second state. In this state, the first and second clamping elements 32a, 32b exert a retaining force on the first and second accommodating elements 50, 52 of the accommodating device. The plurality of needle modules 14 are pushed upward and pressed against the carrier element 58 by the accommodating elements 50, 52, and then the plurality of needle modules 14 are accommodated between the bearing surface 60 of the carrier element 58 and the supporting portions 54, 56 of the accommodating elements 50, 52 in a form-fitting manner. In addition, the friction between the plurality of needle modules 14 and the carrier element 58 and the accommodating elements 50, 52 can be sufficient to fix the plurality of needle modules 14 in the second direction Z and the third direction X in a force-fitting manner.

[0110] In order to return the first and second clamping elements 32a, 32b to the first state, the clamping elements 32a, 32b can be vented. The needle board 10 can also include a fluid-activatable release device 66, which generates a reaction force in the direction opposite to the holding force, by which the plurality of needle modules 14 in the receiving device 28 are released. This is necessary, for example, in order to be able to fully vent or compress the clamping elements 32a, 32b.

[0111] In particular, when the first clamping device 30 acts on the receiving device 28, the release device 66 can also act on the receiving device 28. In the embodiment shown, the release device 66 acts on the first and second receiving elements 50, 52 to move the first and second receiving elements 50, 52 backwards, opposite to the movement applied by the first clamping device 30. To this end, the release device 66 preferably includes at least one pressure element 68, here a first pressure element 68a and a second pressure element 68b. The first and second pressure elements 68a, 68b can be configured in a similar manner to the clamping elements 32a, 32b. This means that the pressure elements 68a, 68b are preferably formed by pneumatically activatable hoses and extend parallel to the second direction Z.

[0112] The first and second pressure elements 68a, 68b have a first state and a second state, wherein the pressure elements 68b, 68a in the second state are expanded compared to the first state. The first and second pressure elements 68a, 68b in the second state exert a reaction force. The pressure elements 68a, 68b preferably maintain the second state autonomously.

[0113] The number of pressure elements 68a, 68b preferably corresponds to the number of clamping elements 32a, 32b, so that each pressure element 68 is assigned to a clamping element 32 and can counteract the latter. The release device 66 can include at least one transmission element 70, wherein each pressure element 68a, 68b is assigned at least one transmission element 70a, 70b, which acts on the receiving device 28 via the transmission element 70a, 70b. At least one transmission element 70 can be configured as a strip extending parallel to the second direction Z, or as shown here, as a pin. In this case, preferably a plurality of transmission elements 70 are provided for each pressure element 68, wherein the transmission elements 70 are arranged one after another in the second direction Z.

[0114] The carrier plate 26 comprises a plurality of through holes 72a, 72b, the number of which corresponds to the number of transmission elements 70, and the transmission elements 70 are accommodated in the through holes 72a, 72b. Each transmission element 70a, 70b extends from the pressure element 68a, 68b assigned to it, through one of the through holes 72a, 72b, to the receiving device 28, in particular to the first part of the receiving device 28, which is formed by the first legs 50a, 52a of the first and second receiving elements 50, 52.

[0115] When the first and second pressure elements 68a, 68b are switched to the second state, the pressure elements 68a, 68b generate a downward reaction force on the transmission elements 70a, 70b because the pressure elements 68a, 68b are supported upward in the needle plate 10. The reaction force is transmitted to the first and second accommodating elements 50, 52 through the transmission elements 70a, 70b, so that the first and second accommodating elements 50, 52 move downward until the reaction force is greater than the holding force or the clamping elements 36a, 36b are exhausted. The form fit between the needle module 14 and the receiving device 28 is released, and the needle module 14 can be displaced and retrieved.

[0116] Accommodating one or more release devices 66 in the needle board 10 can be achieved particularly advantageously, because the needle board 10 has a plurality of layers arranged one above the other. The carrier plate 26 forms a first layer of the plurality of layers, and the further plate 74 forms a second layer of the plurality of layers. The carrier plate 26 and the further plate 74 are arranged in a mutually spaced manner, and the pressure element 68 of at least one release device 66 is arranged between the carrier plate 26 and the further plate 74. The further plate 74 in the needle beam assembly 6 is preferably supported on the needle beam 8, for example by an upper side facing away from the carrier plate 26.

[0117] The plurality of layers can also include a third layer formed by at least one spacing element 76 arranged between the carrier plate 26 and the further plate 74, so that the carrier plate 26 and the plate 74 are positioned at a defined spacing. Figure 4 As shown, the plurality of layers are preferably fixedly connected to each other, for example screwed.

[0118] The dimensions of the layers of the needle board 10 are preferably determined in such a way that the layers form a needle board notch 46 and the first and second clamping angles 42, 44 of the second clamping device 34 engage in the notch 46. For example, for this purpose both sides of the further plate 74 protrude in the third direction X beyond at least one spacer element 76.

[0119] It is possible to provide a substantially plate-shaped spacing element 76 which has corresponding recesses for accommodating the pressure elements 68 of the release device 66. The needle board 10 in the embodiment shown comprises a plurality of spacing elements 76a, 76b, 76c, 76d, 76e which are arranged in a mutually separated manner and whose longitudinal direction extends parallel to the second direction Z and which are arranged spaced apart from each other in the third direction X. This allows each pressure element 68 of at least one release device 66 to be accommodated in the intermediate space between two adjacent spacing elements 76.

[0120] Furthermore, an additional interlocking of the plurality of needle modules 14 in the receiving device 28 along the third direction X can be achieved by at least one supporting device 78 configured to exert an interlocking force on the receiving device 28 at least in the second direction X. As a result, the plurality of needle modules 14 can be fixed in a form-fitting manner in the third direction X. The supporting device 78 in particular deforms the first receiving element and / or the second receiving element 50, 52 so that the plurality of needle modules 14 are fixed in a form-fitting manner in the third direction X.

[0121] The support device 78 comprises at least one bearing element 80, which is assigned to one of the first and second receiving elements 50, 52. One bearing element 80 is preferably assigned to each receiving element 50, 52 of a single receiving device 28 or a plurality of receiving devices 28. Figure 2 As shown, if a plurality of receiving devices 28 are arranged adjacent to one another, a support element 80 can be arranged between each two adjacent receiving devices 28 and thus assigned to a first receiving element 50 of a receiving device 28 and a second receiving element 52 of an adjacent receiving device 28 .

[0122] At least one support element 80 has a foot portion 82, which is preferably arranged below the respective receiving element 50, 52 in the first direction Y. For example, the foot portion 82 can form a contact area for the third leg 50c, 52c of the first or second receiving element 50, 52, respectively. Starting from the foot portion 82, the at least one support element 80 extends upwards along the second leg 50b, 52b of the respective receiving element 50, 52. Starting from the foot portion 82, the at least one support element 80 is particularly preferably configured to taper in the direction toward the support plate 26. The at least one support element 80 in the form of a strip can extend parallel to the second direction Z, or a plurality of support elements 80 can be arranged one behind the other in the second direction.

[0123] In order to exert an interlocking force on the receiving device 28, the position of the at least one carrier element 80 relative to the carrier plate 26 is preferably adjustable. For this purpose, the carrier element 80 can be screwed to the needle board 10, as shown. Here, a screw connection 84 preferably extends from the upper side of the plurality of layers, here formed by the upper side of the further plate 74, through the plurality of layers into the at least one carrier element 80. As a result, the position of the at least one carrier element 80 can be adjusted at any time before the needle board 10 is fixed to the needle beam 8, since the screw connection 84 is accessible from the upper side. When the screw connection 84 is tightened, the carrier element 80 is moved towards the carrier plate 26, while the carrier element 80 is moved away from the carrier plate 26 by loosening the screw connection 84.

[0124] like Figure 3 and Figure 4 As shown, the receiving device 28 is in a clamping position, wherein a plurality of needle modules 14 are fixed in the receiving device 28. When at least one supporting element 80 is moved downward in the direction of the supporting plate 26, the interlocking force applied to the receiving elements 50 and 52 in the third direction X increases due to the tapering of the supporting element 80, and the receiving elements 50 and 52 are deformed until the supporting element 80 is carried on the module carrier 48 of the needle module 14.

[0125] This measure ensures that the plurality of needle modules 14 are correctly positioned even if there is a horizontal acceleration in the conveying direction F. In addition, preferably, a stopper 86 formed of a carbon fiber reinforced material can be arranged at the periphery of the needle board 10, which is arranged at the front or rear in the third direction X. The stopper 86 extends along the needle board 10 parallel to the second direction and can be screwed onto the carrier plate 26, for example. In the third direction X, the stopper 86 supports the support element 80 (the support element 80 is located at the front or rear in the third direction X), so as to suppress any deformation of the support element 80 in the case of acceleration in the third direction X.

[0126] refer to Figure 5 , an example of the method according to the present invention will be further described, the method is based on Figures 2 to 4 In order to fill the needle board 10 with needle modules 14, first a plurality of needle modules 14 are inserted into the at least one receiving device 28, wherein the needle modules 14 are arranged one behind the other in the second direction Z and are movable relative to one another. For this purpose, the receiving device 28 is preferably in the release position and the first clamping device 30 is in the inactive state. If the pressure element 68 of the release device 66 is present, the pressure element 68 can be in its second state.

[0127] Then a relative movement between the needle plate 10 and the adjusting device 88 occurs, such as Figure 5As shown. The adjustment device 88 includes a plurality of adjustment elements 90, which are arranged parallel to each other and extend in the third direction. The adjustment elements 90 can, for example, be formed by a wire and be fixed. The adjustment device 88 can be an independent device outside the needling machine 2, or be formed by the stitching plate 18 or the downward holding plate 20 of the needling machine 2. If the adjustment device 88 is an independent device, the adjustment elements 90 are preferably configured to correspond to the stitching plate 18 and / or the downward holding plate 20 of the needling machine 2 so as to be properly aligned with the needle module 14. Therefore, preferably, the plurality of adjustment elements 90 define the spacing of the needle module 14 in a manner required by the needling machine 2.

[0128] The relative movement is at least the travel of the needle board 10 and the adjustment device 88 relative to each other and in a direction parallel to the first direction Y, as shown by arrow B. Due to the relative movement between the needle board 10 and the adjustment device 88, the plurality of needles 12 in the plurality of needle modules 14 are aligned with the plurality of adjustment elements 90. When the needle 12 hits the adjustment element 90, the needle 12 slides along the adjustment element 90 due to the relative movement, whereby the needle module 14 including the needle 12 is displaced in the second direction Z. This already enables the needle module 14 to be correctly aligned.

[0129] However, it is also conceivable that due to the relative movement in the movement direction B, the plurality of needles 12 are initially arranged between the plurality of adjustment elements 90, in the process optionally slightly displaced as just described, and then more precisely aligned by a further movement component of the relative movement at least in the second direction Z. In this case, the relative movement can include a component in the first direction Y as well as a component in the second direction Z. For example, the needle board 10 or the adjustment device 88 is agitated.

[0130] Once the plurality of needle modules 14 have been correctly aligned, the plurality of needle modules 14 in the receiving device 28 is fixed by means of a fluid-activatable first clamping device 30 , as already described in detail.

[0131] If a support device 78 is provided, it can be activated after the plurality of needle modules 14 have been fixed. To this end, the support element 80 is moved in the direction toward the carrier plate 26, for example by tightening the screw connection 84, so that the receiving elements 50, 52 between them receive the plurality of needle modules 14 in a form-fitting manner in the third direction X.

[0132] If the adjustment device 88 is configured as a separate device, the method finally comprises inserting the needle board 10 into the needling machine 2. The needle board 10 in the needling machine 2 is then preferably fixed to the needle beam 8 by the second clamping device 34. In order to correctly position the entire needle board 10 on the needle beam 8, after inserting the needle board 10 into the needling machine 2 and before activating the second clamping device 34, the method can also comprise the step of moving the needle beam 8 in the penetration direction E in order to align the needles 12 by the stroke and thereby align the needle board 10 on the downward holding plate 20 and / or the stitching plate 18. Thus, the needle board 10 is correctly positioned on the needle beam 8 and can subsequently be fixed on the needle beam 8 by activating the second clamping device 34.

[0133] Furthermore, adjustment screws (not shown) can be provided in order to ensure mutual alignment of the segmented needle board 10 or the plurality of needle boards 10 arranged on the needle beam 8, in particular in the Z direction, in the case of a segmented needle board 10 or a plurality of needle boards 10, respectively.

[0134] The described needle board and method thus enable a plurality of needles 12 of a needle bar 8 to be positioned in the correct position taking into account the dimensional variations of the needle board components and thus enable a very high needle density to be achieved.

Claims

1. A needle board (10) for fastening to a needle bar (8) of a needle loom (2) configured to reinforce a fiber fleece web (4), the needle board (10) comprising: - a carrier plate (26) having a receiving device (28) for receiving a plurality of needle modules (14), wherein the needle modules (14) are arranged in a row, wherein each needle module (14) of the plurality of needle modules (14) has a module carrier (48) and a plurality of needles (12), wherein the plurality of needles (12) are received in the module carrier (48) and are fixedly connected to the module carrier (48); and - a fluid-activatable clamping device (30) configured to exert a retaining force on the plurality of needle modules (14) and / or the receiving device (28) in a first direction (Y) and to fix the plurality of needle modules (14) in the receiving device (28) at least in the first direction (Y), wherein the first direction (Y) is substantially parallel to a penetration direction of the needles of the plurality of needle modules (14) into the fiber fleece web (4); The needle modules (14) in the accommodating device (28) are arranged in a row one after another in a second direction (Z) perpendicular to the first direction (Y).

2. The needle board (10) according to claim 1, wherein: By means of a clamping device (30) configured to apply a retaining force to the multiple needle modules (14) and / or the accommodating device (28) at least in a first direction (Y), the multiple needle modules (14) are fixed in a shape-fitting manner in the first direction (Y) and in a force-fitting manner at least in a second direction (Z).

3. The needle board (10) according to claim 1, wherein: The clamping device (30) includes at least one clamping element (32, 32a, 32b), and the at least one clamping element (32, 32a, 32b) has a first state and a second state. In the first state, the multiple needle modules (14) are movable in the accommodating device (28). In the second state, the at least one clamping element (32, 32a, 32b) expands compared to the first state and fixes the multiple needle modules (14) in the accommodating device (28).

4. The needle board (10) according to claim 3, wherein: The at least one clamping element (32, 32a, 32b) is configured as a compressed air hose.

5. The needle board (10) according to claim 3, wherein: The at least one clamping element (32, 32a, 32b) is received in the receiving device (28).

6. The needle board (10) according to claim 3, wherein: The accommodating device (28) is installed to be movable in a first direction (Y) relative to the carrying plate (26), wherein the accommodating device (28) is movable between a release position and a clamping position by means of the clamping device (30), wherein when the at least one clamping element (32, 32a, 32b) is in a first state, the accommodating device (28) is located in the release position, and when the at least one clamping element (32, 32a, 32b) is in a second state, the accommodating device (28) is located in the clamping position.

7. The needle board (10) according to claim 1, wherein: The accommodating device (28) comprises a first accommodating element and a second accommodating element (50, 52), wherein the first accommodating element and the second accommodating element (50, 52) are opposite to each other and accommodate the clamping device (30) and the plurality of needle modules (14) therebetween, wherein the needles (12) of the plurality of needle modules (14) extend out of the accommodating device (28).

8. The needle board (10) according to claim 2, wherein: The clamping device (30) acts on the accommodating device (28), and the needle plate (10) also includes a fluid-activated release device (66), which is configured to apply a reaction force to the accommodating device (28) in a direction opposite to the retaining force, thereby releasing multiple needle modules (14) in the accommodating device (28).

9. The needle board (10) according to claim 8, wherein: The needle board (10) comprises a plurality of layers stacked one above the other, wherein the carrier plate (26) forms a first layer of the plurality of layers, wherein the release device (66) comprises at least one pressure element (68, 68a, 68b), the at least one pressure element (68, 68a, 68b) being accommodated between two layers of the plurality of layers of the needle board (10).

10. The needle board (10) according to claim 9, wherein: The plurality of layers further comprises a further plate (74), the further plate (74) forming a second layer of the plurality of layers, wherein the further plate (74) and the carrier plate (26) are arranged spaced apart from each other and the at least one pressure element (68, 68a, 68b) is accommodated therebetween.

11. The needle board (10) according to claim 9, wherein: The release device (66) comprises at least one transmission element (70), wherein the at least one pressure element (68, 68a, 68b) acts on the receiving device (28) via the at least one transmission element (70).

12. The needle board (10) according to claim 2, wherein: The needle plate (10) has a supporting device (78), which is configured to apply an interlocking force to the accommodating device (28) at least in a third direction (X) perpendicular to the first direction and the second direction (Y, Z) so as to fix the multiple needle modules (14) in the accommodating device (28) in a shape-fitting manner in the third direction (X).

13. A needle punching machine (2) for needle punching a fiber fleece web (4), comprising: - a needle beam assembly (6) comprising a needle beam (8) and at least one needle plate (10), the at least one needle plate (10) being fastened to the needle beam (8); and - a first main shaft (22) on which a first main connecting rod (24) is eccentrically mounted, said first main connecting rod (24) connecting said first main shaft (22) to said needle beam assembly (6) in an articulated manner, Wherein, the at least one needle plate (10) comprises: - a carrier plate (26) having a receiving device (28) for receiving a plurality of needle modules (14), wherein the needle modules (14) are arranged in a row, wherein each needle module (14) of the plurality of needle modules (14) has a module carrier (48) and a plurality of needles (12), wherein the plurality of needles (12) are received in the module carrier (48) and are fixedly connected to the module carrier (48); and - a fluid-activatable clamping device (30) configured to exert a retaining force on the plurality of needle modules (14) and / or the receiving device (28) in a first direction (Y) and to fix the plurality of needle modules (14) in the receiving device (28) at least in the first direction (Y), wherein the first direction (Y) is substantially parallel to a penetration direction of the needles of the plurality of needle modules (14) into the fiber fleece web (4); The needle modules (14) in the accommodating device (28) are arranged in a row one after another in a second direction (Z) perpendicular to the first direction (Y).

14. The needling machine (2) according to claim 13, wherein: The needle loom (2) has a further fluid-activatable clamping device (34) which is configured to fasten the at least one needle board (10) to the needle beam (8).

15. A method for filling a needle board (10) configured to be fastened to a needle beam (8) of a needling machine (2), the method comprising the following steps: - inserting a plurality of needle modules (14) into a receiving device (28) of a carrier plate (26) attached to the needle board (10), wherein each needle (12) of the plurality of needle modules (14) extends in a first direction (Y), and the needle modules (14) of the plurality of needle modules (14) in the receiving device (28) are arranged one after the other and are movable relative to each other in a second direction (Z) perpendicular to the first direction (Y); - generating a relative movement between the needle plate (10) and the adjusting device (88), wherein the adjusting device (88) comprises a plurality of adjusting elements (90), the plurality of adjusting elements (90) being arranged parallel to each other and extending in a third direction (X) perpendicular to the first direction and the second direction (Y, Z); - aligning the plurality of needles (12) with a plurality of adjustment elements (90) by means of a relative movement between the needle plate (10) and the adjustment device (88); -After alignment, the plurality of needle modules (14) are fixed in the accommodating device (28) by means of a fluid-activatable clamping device (30), wherein the fluid-activatable clamping device (30) applies a retaining force to the plurality of needle modules (14) and / or the accommodating device (28) at least in a first direction (Y).

16. The method of claim 15, wherein: Fixing the plurality of needle modules (14) comprises: The plurality of needle modules (14) are fixed in a form-fitting manner in a first direction (Y), and are fixed in a force-fitting manner at least in a second direction (Z) by a retaining force.

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