Circular weaving machine with circular track

Description

[0001] The invention relates to a circular weaving machine for weaving a core with at least one shuttle which has a weft thread spool and is movable along a circular path around the core.

[0002] The well-known circular weaving machines and weaving processes on circular weaving machines are used to produce hollow profile, tube-like textile fabrics for, for example, fire hoses, water hoses, bags or wheel rims, etc.

[0003] A circular weaving machine of the type mentioned is known from the publication WO 2017 / 190739 A1.

[0004] Along a circular path, one or more shuttles are moved, each with a weft thread spool that guides the weft thread in a circular path around the weaving core.

[0005] These circular weaving machines are further equipped with warp bobbin systems. Warp bobbin systems essentially consist of a warp thread bobbin with warp thread, a holder for the warp thread bobbin (warp bobbin holder), and a thread tensioning device.

[0006] The warp bobbin devices are arranged in the immediate vicinity of a weaving plane, which is radially enclosed by the circular orbit and determined by the circumferential course of the weft thread around the weaving core.

[0007] The warp bobbin units are designed to be movable, with their travel path passing through the weaving plane. This changing position creates a so-called pleating of the warp threads and results in interweaving with the weft thread. Separate thread guides or redirections for the warp threads are largely unnecessary in this design.

[0008] This circular loom can produce a tightly fitting fabric of high weaving quality and variability under high thread tension of the weft and warp threads.

[0009] However, it turns out that the movement of the warp bobbin devices through the weaving plane is very complex in terms of design, and in particular maintaining a uniform thread tension during the movement of the warp bobbins relative to the weaving plane and the weaving core places high technical demands on the design of the circular weaving machine.

[0010] Furthermore, the transfer of the warp bobbin units requires increased mechanical and control engineering effort. Besides the necessary control of the acceleration and deceleration of the relatively large masses, the rapid transfer and rapid retraction of the warp bobbin units and their positioning devices from the weaving plane for passing the weft bobbin also entail considerable design complexity, with the transfer and retraction times limiting the maximum possible speed of the weft bobbin.

[0011] In the circular weaving machine according to publication FR 2339009 A1, the warp bobbin units are pivotally mounted on a peripheral housing. The warp threads are fed alternately in a fanning pattern to the core or weaving plane by means of thread guide tubes connected to the pivoting warp bobbin units. These thread guide tubes cross the shuttle track in alternating directions. The track is designed with openings, in particular wide slots for the thread guide tubes, which assume their changing positions along these slots.

[0012] This circular weaving machine also requires a complex mechanical and control-related design for the movement of the warp bobbin devices, whereby the speed of the shuttles is limited by the passage times of the thread guide tubes.

[0013] Furthermore, the pivoting of the thread guide tubes, which guides the warp thread at different angles to the outlet of the thread guide tube and causes it to rub against the inner wall of the tube, leads to considerable thread wear. Because of this risk of damage, such circular weaving machines are unsuitable for processing particularly delicate threads, such as carbon fibers. This largely prevents the use of these circular weaving machines for the production of fiber preforms for fiber composite products.

[0014] When the thread guide tubes are pivoted in a circular arc, the thread tension of the warp thread decreases significantly near the weaving point, which can lead to a very loose fabric and an unclean weaving pattern with tangles.

[0015] Relatively large slots or gaps must be provided for the passage of the thread guide tubes through the track, so that these track interruptions lead to a very bumpy crossing of the shuttles over the slots and consequently to a very inhomogeneous rotation of the shuttles, which in turn leads to undesirable vibrations in the circular weaving machine and to further fluctuations in thread tension.

[0016] The publication JP H01 168938 A disclosed a circular weaving machine with stationary warp bobbin devices and a guiding device for the warp threads to be woven. The guiding device consists of several deflection rollers over which the warp threads are deflected at different angles, and further of a belt construction with thread loops through which some or all of the warp threads are guided, the belts being alternately displaceable.

[0017] The warp threads of this circular loom are deflected multiple times and guided at sometimes narrow angles, which also leads to considerable thread wear. Because of this risk of damage, such circular looms are unsuitable for processing particularly delicate threads, such as carbon fibers, and therefore for manufacturing fiber preforms for fiber composite products.

[0018] The invention is based on the objective of providing an improved circular weaving machine that eliminates the disadvantages of the prior art and, in particular, enables higher weaving productivity with simpler design means.

[0019] Furthermore, the task is to ensure improved functionality of the circular weaving machine for the production of a hollow-profile fabric, especially from sensitive fibers such as carbon fibers, with high weaving quality and variability.

[0020] The problem is solved according to the invention by a circular weaving machine with the features of claim 1 or claim 3.

[0021] One or more shuttles move with their weft thread spools along a circular orbit, formed, for example, mechanically or electromagnetically, which determines the conveying or guiding line for the concentric conveying or guiding of the shuttle around the weaving core.

[0022] The contactor(s) can move actively along the orbit, e.g. preferably by means of their own electrically operated direct drive, or the contactor(s) can be moved and controlled passively along the orbit, e.g. by means of an externally driven, rotatable mechanical carrier or by means of an electromagnetic drive.

[0023] The circular orbit is preferably arranged radially (perpendicular to the weaving axis) with respect to the axially directed weaving axis of the circular weaving machine, giving the circular weaving machine a particularly narrow design.

[0024] However, for certain applications of the circular weaving machine, it can be advantageous to arrange the circular orbit quasi-radially (at an angle other than 90° to the weaving axis).

[0025] The radial outer circumference of the circular orbit forms the radial boundary of the web plane of the circular loom, within which the shuttle(s) with the weft thread rotate. The axial outer width of the circular orbit forms the axial boundary of the web plane of the circular loom, within which the shuttle(s) with the weft thread rotate. The outer boundary points of the circular orbit essentially define the web plane as a circular disk.

[0026] The warp bobbin devices with the warp thread bobbins are preferably located in the immediate vicinity of the web plane in order to be able to feed the warp threads to the core via the shortest possible paths.

[0027] In the variant of the invention according to claim 1, the warp spool devices can be arranged in a stationary manner, e.g. fixed to a housing part of the circular weaving machine, or can be arranged in a movable manner at different positions in relation to the housing of the circular weaving machine.

[0028] The guiding device according to the invention (thread guiding device) guides and repositions the warp thread(s) (warp thread guide) between its provision by the warp bobbin device(s) and its weaving with the weft thread at a weaving point on the core. The guiding device operates independently of the design and function of the warp bobbin device(s).

[0029] The weft point is the movable point at which the warp threads are temporarily interwoven with the weft threads on the surface of the loom core.

[0030] The guide device is movably arranged outside the plane of the track or is movably designed in a fixed arrangement, wherein the movable guide device acts completely outside the plane of the track and only the guided warp thread crosses the plane of the track and thereby passes through the associated recess of the circular orbit.

[0031] Under this provision, the movable guide device can, for example, be attached to a radial outer wall of the machine housing of the circular weaving machine or to the radial outer circumference of the circular orbit or be movably mounted.

[0032] Preferably, several guide devices are arranged around the circumference of the circular orbit.

[0033] There may be one guiding device for each warp thread of a warp bobbin device, or one guiding device for each warp thread of a group of warp bobbin devices, or a single guiding device for guiding all warp threads of the warp bobbin devices involved in the circular weaving machine.

[0034] If a group of warp bobbin devices is provided that is assigned to a guide device, these warp bobbin devices can be arranged next to each other, one behind the other or one above the other with respect to the direction of the thread guidance of the warp threads towards the guide device.

[0035] If the movable guide devices are provided in the same number as the warp bobbin devices to be operated on the circular weaving machine and are functionally assigned to each, each warp thread is guided separately by a guide device.

[0036] By means of the movable guide device(s), the warp threads withdrawn from the warp thread spools can be moved – according to the first variant of the invention according to claim 1 – quickly and with little effort on both sides of the orbit and thus of the web plane, wherein a warp thread guided by the guide device subsequently crosses the web plane, in that the warp thread leaving the guide device, for example via a thread outlet, passes a recess of the circular orbit associated with the travel path of the thread outlet.

[0037] The circular orbit thus has a number of openings or interruptions corresponding to the number of planned recesses.

[0038] Preferably, a guide or thread outlet of the guide is spatially and functionally assigned to one or more recesses of the circular orbit. This allows individual warp threads to pass through a recess, or several warp threads together, with minimal or ideally no thread deflection. This enables particularly low-wear, thread-friendly guiding and passage of the warp threads through the recess of the orbit.

[0039] The recesses in the orbit are preferably designed to be so narrow that only the warp thread(s) can just barely cross the orbit without contacting it, in order to avoid frictional wear of the warp threads.

[0040] Preferably, the recesses in the orbit for the passage of the warp threads are aligned and extended according to the alternating path of the warp threads as described by the guide device(s) or the thread outlet of the guide device(s). This allows the passage of the warp thread in the recess of the orbit to occur without deflection.

[0041] Specifically, the orbital recesses can z.B. as an elongated slit that locally breaks through the orbit (perforation) or z.B. It should be formed as a continuous joint that interrupts the orbit at that point (interruption).

[0042] While the warp threads are moved through the guide device(s), the required thread tension of the warp threads is essentially maintained by the thread tensioning device of the warp bobbin devices, the positioning of which can be stationary and locally variable.

[0043] In this way, the warp threads can be positioned on both sides of the web plane. z.B. The warp threads are alternately spread and fanned in opposite directions to form a warp thread fold while maintaining high thread tension, whereby in the changing positions of the warp threads located outside the plane of the web, the passage of the shuttle(s) along the orbit is ensured, after which an undulation / interweaving of the warp threads with the weft thread passing through the warp thread fold, which is taken from the weft thread spool of the shuttle carried along the orbit, takes place on the core.

[0044] Depending on the sequence and operating cycles in which the warp threads alternately change their position by means of the guide device(s) and the shuttles traverse the orbit, a wide variety of weaving patterns can be formed on the core to be woven.

[0045] Since, according to the invention, only the warp threads themselves are guided through the web plane by the movable guide device(s), the geometric structure of the guide device(s) for the necessary changing positioning of the warp threads and the orbit can be designed in a structurally simplified manner, and the changing positions of the warp threads can be formed very close to the lateral, axial boundary of the web plane, so that the passage of the shuttle is just barely free of contact with the warp thread, after which the changing of the warp thread positions and the orbit of the shuttle can take place more quickly.

[0046] With the inventive design of the circular weaving machine, the weaving process can therefore be accelerated and higher productivity achieved by reducing the transport effort for changing and fanning the warp threads in terms of both design and space.

[0047] The possibility of positioning the warp threads close to the orbit also results in the warp threads running at a very shallow angle (weaving angle) in relation to the extent of the web plane, so that the thread tension of the warp threads remains largely constant even through the close-range change of position, to the advantage of high weaving quality.

[0048] Furthermore, the contactless and deflection-free guiding and passage of the warp threads through the orbit ensures gentle use of the warp thread material, so that even sensitive thread materials, such as carbon fibers, can be processed well.

[0049] As a result, a tightly fitting fabric with improved weaving quality can be produced at very high operating speeds under high thread tension of the weft and warp threads.

[0050] Because the guide device(s) according to the invention move only the warp threads in narrow recesses of the orbit, the further advantage compared to the known design of the circular weaving machine with thread guide tubes pivoting into the plane of the web is that the rotation of the shuttles in the orbit can be carried out with less vibration and thus faster while maintaining a high thread tension of both the warp and weft threads, further improving the aforementioned increase in productivity and quality.

[0051] Due to the feasibility of achieving a consistently high thread tension of the weft and warp threads, the circular weaving machine according to the invention is particularly suitable for weaving cores with a cross-sectional geometry that varies in axial extension (in the direction of the rotation axis of the core (core axis)), since the tightly woven threads can conform to a changing core contour.

[0052] To weave a stationary fabric onto such a contoured core, the core is moved along the weaving axis of the rotary loom to weave its entire contour. The weaving point, where the warp threads are interwoven with the weft threads on the surface of the core, moves not only around the circumference of the rotating core but also along its core axis.

[0053] The axis of rotation of the weaving core (weaving core axis) is preferably designed to be congruent with the weaving axis of the circular weaving machine, so that the weaving core is moved in the direction of its axis of rotation (weaving core axis) along the congruent weaving axis of the circular weaving machine.

[0054] However, when weaving and moving the weaving core along the weaving axis of the circular loom, the rotation axis of the weaving core (weaving core axis) can also be arranged at an angle to the weaving axis of the circular loom in order to create a variable angular position of the warp threads and weft threads on the weaving core and thus a variable fabric tension.

[0055] Due to the advantages described above, the circular weaving machine according to the invention is also suitable for the production of hollow profile-like, fiber-containing fabric preforms of fiber composite products, such as z.B. For the production of woven preforms for wheel rims made of fiber composite material. Advantageous embodiments and further developments of the invention are described in the dependent claims, the following description and the accompanying drawings.

[0056] According to an advantageous embodiment, the movable guide device has at least one positioning part that is arranged or designed to be movable or pivotable.

[0057] The positioning part can be moved or pivoted alternately relative to a base body of the guide device or relative to the machine housing of the circular weaving machine or relative to the circular orbit by means of a corresponding design of the guide device.

[0058] According to the first variant of the invention according to claim 1, the guide device or preferably the positioning part is equipped with at least one thread guide element.

[0059] The thread guide element of the guide device is designed for the actual steering and guiding of at least one warp thread during its changing movement and guides one warp thread or several warp threads running from the warp thread spool, possibly also with a thread deflection, along with it.

[0060] The thread guide element can be connected to the positioning part or integrated into the positioning part.

[0061] One or more thread guide element(s) may be arranged or formed on the positioning part of the guide device.

[0062] The warp thread can also be guided and positioned by a positioning part of the guide device, which, according to the second variant of the invention according to claim 3, directly carries a warp thread spool, whereby a thread guide element may be dispensed with if necessary.

[0063] The guiding device can also have several positioning parts, possibly with one or more thread guiding elements for guiding and directing one or more warp threads.

[0064] According to the first variant of the invention according to claim 1, the thread guiding element is designed as a thread guiding channel or as a thread guiding groove, through which the warp thread is passed.

[0065] The thread guide element can terminate with a thread exit for the warp thread. A thread exit is defined as an opening at the point where the guided warp thread emerges from the thread guide element of the positioning part.

[0066] Preferably, the thread guide element for moving or pivoting the warp thread can be arranged and designed on or in a movable or pivotable positioning part of the guide device.

[0067] The positioning part of the guide device can be, for example, a movable guide carriage or a swivel arm on or in which one or more thread guide element(s) are arranged or formed.

[0068] Furthermore, the positioning element can also be, for example, a movable or pivotable roller on which a thread guide groove is formed as a thread guide element in which the warp thread runs. Preferably, the movement or pivoting of the positioning element and subsequently of the guided warp thread takes place with or without thread guide elements parallel to the weaving axis or with a rotation axis perpendicular to the weaving axis of the circular weaving machine.

[0069] According to this, the path of the warp threads is essentially perpendicular to the plane of the orbit.

[0070] Provided that the recesses of the orbit are also designed in accordance with the path of the warp threads during their changing movement, i.e., also parallel to the weaving axis of the circular loom, the path and travel time of the warp threads to cross the plane of the web can be shortened, so that the changing speed of the warp threads and thus the rotational speed of the shuttles can be increased.

[0071] According to a further advantageous embodiment, the positioning part is designed to be linearly movable, which means that the guided warp thread can also be linearly moved.

[0072] Linear movement of the positioning part can be implemented relatively easily in terms of design and control technology.

[0073] In terms of drive technology, direct drives, preferably linear drives, can be used, which can be located, for example, on the positioning part, on the base body or on the machine housing and which can be operated, for example, pneumatically by pneumatic cylinders or electrically by electric motors, whereby each positioning part can be driven individually.

[0074] The alternating movement of the positioning part can be generated and controlled by special, switchable direct drives, e.g. by means of a rack or threaded rod, which act in two directions.

[0075] These drives can achieve strong acceleration, deceleration and rapid operating changeover, thus enabling a rapid change of direction of the positioning part.

[0076] The guide and / or drive of the positioning part can also be magnetic and / or electromagnetic.

[0077] Furthermore, if the warp thread carried along with the positioning part is also moved linearly, the associated linear guidance of the warp thread results in lower thread tension losses than with non-linear movements of the warp threads, which further improves the quality of the woven product.

[0078] Preferably, the linear mobility of the positioning part or the guided warp thread is designed in the axial direction along the weaving axis of the circular weaving machine.

[0079] In addition to the resulting space saving, the path of the positioning part and thus the path of the warp threads is exactly perpendicular to the plane of the orbit.

[0080] This allows the path and travel time of the warp threads to cross the track plane with the fewest possible deflections in a straight line to be shortened, so that the changing speed of the warp threads and thus the rotational speed of the shuttle can be further increased.

[0081] The positioning part of the guide device can, for example, be mounted so that it can be moved or swivelled by means of appropriate bearing elements.

[0082] For example, a guide carriage can be mounted on a base body of the guide device or on a component of the machine housing or directly on the outer circumference of the circular orbit by means of appropriate travel bearing elements, while a swivel arm can be mounted pivotably on a base body of the guide device or on a component of the machine housing or directly on the outer circumference of the circular orbit by means of appropriate swivel bearing elements.

[0083] Likewise, the base body of the guide device can be arranged on a component of the machine housing or directly on the outer circumference of the circular orbit.

[0084] The base body can be stationary and connected to the machine housing or orbit, or it can be movably arranged on it.

[0085] One or more positioning parts can be assigned to a base body, which are mounted so that they can be moved or pivoted relative to this base body.

[0086] The bearing element(s) for the movable mounting of a positioning part, such as a guide slide, can be, for example, one or more longitudinally extended guide groove(s) of the base body or component of the machine housing or of the guide slide, which are arranged in the direction of the intended axis of movement of the thread guide element and correspond to corresponding guide pins or guide web(s) of the guide slide or the base body or component of the machine housing.

[0087] In particular, bearing elements designed in a dovetail shape (tongue and groove) and corresponding bearing elements may be provided.

[0088] Furthermore, the bearing elements can also be one or more guide rail(s) corresponding with rollers or bearing bushings.

[0089] The corresponding bearing elements are preferably designed so that they slide or roll on top of or against each other with as little frictional resistance as possible, so that the positioning part can be moved, pivoted and accelerated as easily and quickly as possible.

[0090] For this purpose, it is advantageous if the positioning part also has the lowest possible mass. Therefore, the material of the positioning part is preferably plastic or light metal.

[0091] Several bearing elements, such as longitudinally extended guide grooves, guide webs or guide rails, can be arranged parallel to each other, which makes the bearing and guiding of the guide carriage and thus the guiding of the warp threads even more precise and safer.

[0092] The design of the bearing elements for supporting a guide carriage can be based on known linear guides, such as the linear guides from Festo.

[0093] If a base body is provided which is arranged in a radial direction between the positioning part and the circular orbit, it is preferably designed and arranged in relation to the warp thread carried with the positioning part in such a way that a contactless passage of the guided warp thread through the base body in the direction of the circular orbit is enabled.

[0094] For example, the base body can have a slot-like opening in relation to the thread guide or the path of the thread exit, so that the warp thread can pass through it, preferably without contacting the opening.

[0095] According to a further advantageous embodiment, if the warp thread spool is arranged in at least one warp spool device essentially in a straight and thus deflection-free extension of the warp thread's path through the thread guide element and / or essentially in a straight and thus deflection-free extension of the travel or pivoting path of the thread guide element, the design can lead to an advantageous reduction in the total number of thread deflections required and a reduction in frictional wear in the warp thread's path between the warp thread spool of the warp spool device and its passage through the thread guide elements of the guide device.

[0096] In particular, this allows the thread tension of the warp threads in question to be kept even more stable with lower thread tension losses, and also enables the thread guidance to be implemented in a particularly thread-friendly manner.

[0097] Thanks in particular to stable thread tension and gentle guidance of the weft and warp threads, a wide variety of thread, tape or fiber materials in different fiber thicknesses and combinations thereof can be used, such as sensitive carbon fibers, but also wide flat tapes or other textile strands.

[0098] According to a further advantageous embodiment, the warp thread spool of at least one warp spool device is arranged essentially in extension of the radial extent of the circular orbit. Thus, the warp thread spool(s) of the warp spool device(s) are arranged not only outside the circumference of the circular orbit, but essentially in radial extension of the orbit, or the plane of the orbit.

[0099] The warp thread bobbins of several warp bobbin devices can be arranged in a radial, star-shaped arrangement around the outer circumference of the circular orbit.

[0100] The warp bobbin device(s) can be attached, for example, to a radial outer wall of the machine housing of the circular weaving machine.

[0101] In this arrangement, the warp threads can run with very little deflection from the warp thread spool via the guide device(s) to the weaving point.

[0102] The thread deflections of the warp threads that have to be made by the alternating movement of the guide device(s) are largely reduced, and at the same time the thread length of the warp thread is subject to less fluctuation, which has a further advantageous effect on a constant thread tension.

[0103] A second variant of the invention according to claim 3 provides that at least one warp spool device is arranged on the movable guide device.

[0104] In this process, the warp bobbin assembly(s) with the warp thread bobbin are guided by the guide device, preferably by the movable positioning part. Preferably, the warp bobbin assembly can be carried by the movable guide device – piggyback-style.

[0105] For example, the warp spool device(s) can be arranged and guided on the positioning part(s) of the guide device(s), with one or more warp spool devices being provided on a positioning part.

[0106] In this embodiment of the invention, a more compact circular weaving machine can be achieved, and, to the advantage of further improved thread tension and thread protection, the warp thread path can be shortened and the number of necessary deflections in the warp thread guide minimized, especially since the thread tension can be kept explicitly stable for each individual warp thread due to the direct assignment of the warp bobbin assembly to the guide assembly. If two or more warp bobbin assemblies are arranged on a movable guide assembly, these warp bobbin assemblies with their warp bobbins move together with the guide assembly.

[0107] When multiple warp spool devices are used, several warp threads of the warp spool devices can be guided together or individually through preferably a thread guide element of the guide device and then pass together or individually through a recess of the orbit.

[0108] These combinations enable the joint guiding and interweaving of several, even different types of warp threads, in particular ensuring a substantially consistently high thread tension of the warp threads.

[0109] According to a structurally advantageous embodiment of the invention, the circular orbit has at least one guide rail or is formed by at least one guide rail in or on which at least one contactor is guided.

[0110] In this case, the contactor(s) can be moved by means of rollers or sliding means in or on at least one preferably ring-shaped guide rail which defines the circular orbit.

[0111] The guide rail is designed according to the shape of the recesses where the warp thread(s) alternately pass over the plane of the track before or after passing through the shuttle, thus crossing the shuttle's path. This design may include, for example, locally interrupted slots or completely interrupted joints. In the case of rail interruptions formed by joints, the guide rail is divided into rail segments.

[0112] The contactor(s) travel, roll, or slide over these points of penetration or interruption in the ring-shaped guide rail.

[0113] The openings or breaks in the annular guide rail are preferably designed to be so narrow that only the warp thread(s) can just barely cross the guide rail without contacting it, thus preventing frictional wear of the warp threads. Accordingly, the very narrow openings or breaks in the annular guide rail have virtually no influence on the passage and therefore on the smooth running of the shuttle.

[0114] To increase running accuracy, the contactor(s) can also run in several spaced-apart guide rails using rollers or sliding elements.

[0115] The changing positions of the warp threads can preferably be designed so close to the axial limit of the ring-shaped guide rail that the passage of the gate without contact is just ensured.

[0116] The guide rail is preferably designed as an inner runner rail, in which the contactor(s) move within the circular orbit that radially limits the track plane.

[0117] It is also conceivable to design such as this, in which the contactor(s) are integrated within several guide rails spaced apart from each other.

[0118] In all cases, the guide rail(s) provide a track that enables low-vibration rotation of the shuttles with consistently high thread tension of the weft threads, thereby achieving a largely homogeneous weaving operation at a high rotational speed.

[0119] The contactor can, for example, be guided in or on the guide rail by means of rollers, preferably rubberized rollers, and roll over the openings and breaks, which further improves the smooth running of the contactor with regard to vibrations and rolling noise.

[0120] According to a further advantageous embodiment of the invention, the guide and / or drive of the contactor on or in the circular orbit is designed magnetically and / or electromagnetically, z.B. similar to a well-known Transrapid driving system. Here, z.B. A moving electromagnetic field is generated on the circular orbit, so that the contactor is guided and / or driven along the circular orbit by means of a magnetic bearing and / or electromagnetic control, rolling, sliding or floating without contact.

[0121] In this way, the frictional resistances in the circulation of the contactors along the circular orbit and across the interruptions can be further reduced.

[0122] According to a particularly advantageous embodiment of the invention, a second circular orbit can be provided along which at least one gate can be moved, wherein the guided warp thread, crossing the plane of the first and / or second orbit, passes through the recess of the first and / or second circular orbit.

[0123] The guided warp threads can be moved alternately and according to any desired sequence pattern, crossing one or both planes of the track, by the guide device assigned to the two orbits.

[0124] The combined circular orbits enable the parallel operation of several shuttles with different directions of rotation and cycles and different thread, tape or fiber materials, allowing a large number of different weft and warp threads to be processed simultaneously and creating an even greater variety of possible weaving patterns and fabric properties.

[0125] Preferably, the second circular orbit can be arranged parallel to and spaced apart from the first circular orbit.

[0126] These and other features arising from the patent claims, the description of the exemplary embodiments and the drawings can each be realized individually or in combination as advantageous embodiments of the invention for which protection is claimed here.

[0127] The circular weaving machine according to the invention is explained in more detail below using several exemplary embodiments. The accompanying drawings show a schematic representation in Fig. 1 a front view of a circular weaving machine according to the invention for weaving a contoured, two-part weaving core with variable core cross-section, with a rail-guided circular orbit for two shuttles and with 12 stationary warp bobbin devices and 12 guide devices, Fig. 2a,b side views of the circular weaving machine according to Fig. 1 (from right) in two operating phases of weaving the contoured, two-part weaving core with variable core cross-section, Fig. 3 a front view of a second embodiment of the circular weaving machine according to the invention for weaving a cylindrical weaving core, with a rail-guided circular orbit for two shuttles and with 12 stationary warp bobbin devices and 12 guide devices, Fig. 4 a half-side view of the circular weaving machine according to Fig. 3 , Fig. 5 a half-side view of the circular weaving machine according to Fig. 3 , however, with 24 stationary warp bobbin devices and 12 guide devices, Fig. 6 a front view of a third embodiment of the circular weaving machine according to the invention for weaving a cylindrical core, with a rail-guided circular orbit for two shuttles and with 12 warp bobbin devices on 12 guide devices, Fig. 7a,b side views of the circular weaving machine according to Fig. 6 in two working phases of weaving the cylindrical weaving core, Fig. 8a,b,c half-side views of a fourth embodiment of the circular weaving machine according to the invention, similar to the circular weaving machine according to Fig. 6 , with two rail-guided circular orbits for two shuttles each and with 12 warp bobbin devices on 12 guide devices in three working phases of weaving a cylindrical core, Fig. 9a,b,c half-side views of a fifth embodiment of the circular weaving machine according to the invention, similar to the circular weaving machine according to Fig. 8 , with two rail-guided circular orbits for two shuttles each and with 24 warp bobbin devices on 12 guide devices, each with two guide carriages, in three working phases of weaving a cylindrical core. Fig. 10a, b Side views of a circular weaving machine not according to the invention for weaving a contoured, two-part core, with a rail-guided circular orbit for two shuttles and with 12 stationary warp bobbin devices and 12 alternative guide devices in two working phases.

[0128] The examples explained below refer to the accompanying drawings, which form part of the examples and in which specific embodiments in which the invention can be implemented are shown for illustrative purposes.

[0129] In the figures, identical, equivalent or similarly designed elements are provided with identical reference symbols, insofar as this is expedient.

[0130] It is understood that other embodiments may be used and structural or logical changes may be made without deviating from the scope of protection of the present invention.

[0131] It is understood that the features of the various exemplary embodiments described herein can be combined with one another, unless specifically stated otherwise. The following detailed description should therefore not be interpreted as restrictive.

[0132] The scope of protection of the present invention is defined by the attached claims.

[0133] Fig. 1 Figure 1 shows a circular loom in which a weaving core 1a is arranged centrally to a weaving axis 2 of the circular loom and is surrounded by a circular track 3 of the circular loom. The track 3 has an annular web body 4 consisting of 12 interconnected, ring-segment-shaped web segments 5, which are fixedly arranged to a, preferably hollow cylindrical, machine housing 6 of the circular loom. The web body 4, specifically the web segments 5, each has three pairs of ring-segment-shaped guide rails 7, wherein the pairs of rail segments (rail pairs) of the interconnected web segments 5 are arranged and formed concentrically around the central weaving axis 2 of the circular loom.

[0134] Two outer pairs of rails, each with two guide rails 7, are arranged on the opposite side walls of the web segments 5 of the web body 4, and one inner pair of rails, each with two guide rails 7, is arranged on an axially extending inner wall of the web segments 5 facing the weaving axis 2 (see also Fig. 2a, b ).

[0135] The radial outer boundary of the web body 4 is formed by the axially extended outer walls of the web segments 5 facing away from the weaving axis 2, while the radially extended side walls of the web segments 5 axially limit the web body 4.

[0136] The segmented track body 4 with the segmented guide rails 7 (rail segment pairs) together forms the circular orbit 3, wherein the outer boundary of the track body 4 in its radial and axial extent defines the outer contour of a track plane 8 of the circular orbit 3.

[0137] The circular weaving machine further has 12 warp bobbin devices 9, each with 12 warp thread bobbins 10, which are arranged laterally and fixedly to the machine housing 6 of the circular weaving machine.

[0138] Corresponding to the number of existing warp bobbin devices 9, a total of 12 movable, mobile guide devices 11 are arranged on the outer circumference of the web body 4 outside the circular orbit 3 and concentrically around the central weaving axis 2 of the circular weaving machine.

[0139] Each of the guide devices 11 has a base body 12 attached to the track body 4 and / or to the machine housing 6 and a positioning part 13 which is axially movable relative to the base body 12 and to the machine housing 6 and which in the exemplary embodiment is designed as a guide slide 13.

[0140] The guide carriage 13 comprises a thread guide element 14 for guiding and directing a warp thread 15, which in this embodiment is designed as an axially directed thread guide channel 14 (thread channel) and ends with a thread deflection in a thread outlet 16.

[0141] The thread guide element 14 can also be designed here as a thread guide groove open at the top (not shown).

[0142] The weaving core 1a has a weaving core axis 17 which, according to the arrangement in this exemplary embodiment, is congruent with the weaving axis 2 of the rotary weaving machine. As shown in the side view after Fig. 2a, b As can be clearly seen, the divisible weaving core 1a has a variable core cross-section and thus a non-uniform circumference. It is rotatable about its weaving core axis 17 and movable along the weaving axis 2 of the circular weaving machine.

[0143] From the Figuren 1 , 2a und b It is evident that the warp threads 15 of the 12 warp thread spools 10 are guided to a weaving point on the weaving core 1a, maintaining a certain thread tension of a thread tensioner not shown of the warp spool device 9, via a thread channel 14 and a thread outlet 16 of the movable guide carriage 13 of the guide device 11.

[0144] According to the number of guided warp threads 15, the orbit 3, or the web body 4 and the guide rails 7, has recesses 18 in the form of continuous narrow joints 18 directed perpendicular to the weaving axis 2, which divide the web body 4 with the guide rails 7 into the 12 web segments 5.

[0145] Along the guide rails 7 are two shuttles 19, each of which has a shuttle carriage 20 with a weft thread spool 21.

[0146] The weft thread 22 of the weft thread spool 21 is guided linearly to the current weaving point on the weaving core 1a while maintaining a certain thread tension, in order to weave the non-uniformly contoured weaving core 1a.

[0147] The rifles 19 travel along the guide rails 7 by means of the rifle carriages 20, which form the guide of the circulating rifles 19 and thus define the circular running line of the rifles 19.

[0148] The axis of rotation of the weft thread spool 21 is arranged in the direction of rotation of the shuttle 19, so that the feeding of the weft threads 22 to the weaving core 1a largely requires few or no deflections.

[0149] The carriages 20 each have nine rubberized guide rollers 23, of which three guide rollers 23 are assigned to each pair of guide rails 7. Three guide rollers 23 are held and guided on both sides by the two outer pairs of guide rails 7, and three further rollers 23 are guided on both sides by the inner pair of guide rails 7.

[0150] Each contactor 19 can be driven and controlled separately by a motor (direct drive) located on the contactor carriage 20, whereby the power supply can be provided, for example, via several sliding contacts or carried energy storage devices, and the control commands can be transmitted, for example, via radio control signals (not shown).

[0151] The snipers 19 can therefore roll independently of each other at the same or different speeds along the guide rails 7 of the orbit 3.

[0152] The guide rollers 23 are so numerous and widely spaced apart that the carriage 20 always contacts at least two track segments 5 during its rotation and can thus bridge one or even several joints 18 of the track body 4 simultaneously, which ensures a smooth and quiet running of the carriage 20.

[0153] In Fig. 1 , 2a, b The two rotating gun carriages 20 of gun 19 are shown schematically in the 6 o'clock and 12 o'clock positions along the orbit 3.

[0154] For the sake of clarity, the following are included: Figuren 2a, b Only two warp bobbin devices 9 and the associated guide devices 11 are shown, namely the warp bobbin devices 9 and guide devices 11 arranged in the 6 o'clock and 12 o'clock positions of the circular weaving machine.

[0155] The warp thread 15 provided by the warp bobbin device 9 is guided through the thread channel 14 and exits at a thread outlet 16 of the guide carriage 13, from where the warp thread 15 - passing through an axially extended passage 24 of the base body 12 without contact - is guided linearly to the weaving point on the weaving core 1a.

[0156] The thread channel 14 is axially aligned with respect to the circular weaving machine and its orbit 3 in the direction of the weaving axis 2, so that the warp thread 15 runs essentially perpendicular to the web plane 8 through the thread channel 14.

[0157] The guide slides 13 arranged around the circumference of the orbit 3 are each mounted to be linearly displaceable relative to each other in the axial direction parallel to the weaving axis 3.

[0158] For the mounting of the guide carriage 13, two longitudinally extended guide grooves arranged parallel to each other are provided on the base body 12, in which the guide carriage 13 is slidably mounted and guided with two corresponding guide webs (not shown).

[0159] The guide grooves and guide ribs are axially aligned with respect to the circular loom and its orbit 3 in the direction of the weaving axis 2, so that the guide carriages 13 with the thread channel 14 and the warp threads 15 carried along can be moved essentially perpendicular to the plane 8 of the orbit 2 and parallel to the weaving axis 2.

[0160] The rapid alternating movement of the guide carriages 13 is generated and controlled by individual, bidirectional, switchable electric linear drives (not shown).

[0161] The control of the back-and-forth movement of the guide carriage 13 can z.B. along a rack or threaded rod (not shown).

[0162] In this embodiment, the warp thread bobbins 10 of the warp bobbin devices 9 are each arranged in a straight extension of the thread channel 14 of the guide carriage 13 on the machine housing 6.

[0163] The feeding of the warp threads 15 from the warp thread spools 10 via the thread channel 14 of the guide carriage 13 to the weaving point on the weaving core 1a is thus largely straight with few deflections, whereby the thread tension of the warp threads 15 can be maintained at a high level.

[0164] For the alternating change of the warp threads 15 on both sides of the web plane 8, these are each guided linearly back and forth in the axial direction by means of the movable guide carriage 13, whereby the warp thread 15 exiting from the thread outlet 16 passes through an axially extended passage 24 of the base body 12 (see Fig. 2a, b ) and subsequently the corresponding axially extended narrow joints 18 between two adjacent track segments 5 cross the track plane 8 (see Fig. 1 ).

[0165] Only the warp threads 15 pass through these narrow gaps 18 without contacting the orbit 3 in both directions for the purpose of changing sides.

[0166] The warp threads 15 running towards the weaving point assume a variable angle (weaving angle) relative to the plane of the web 8 during the alternating axial forward and backward movement. When passing the joints 18 in the orbit 3, the weaving angle of the warp threads 15 is approximately 0°; in the change position to allow the passage of the shuttle 19, the maximum weaving angle of the warp threads 15 is reached (cf. Fig. 2a, b ).

[0167] Since no geometric elements other than the warp threads 15 themselves act in the area of ​​the orbit 3 or within the web plane 8 during the necessary side change of the warp threads 15, the shuttles 19 alone form the outer limit for the positioning of the warp threads 15 when passing through the shuttles 19, so that the warp threads 15 can form an optimally small maximum weaving angle, which results in a small change in the weaving angle of the warp threads 15 to the web plane 8 during the position change of the warp threads 15.

[0168] This angular limitation of the movement of the warp threads 15 for the side change also ensures that a high thread tension of the warp threads 15 is maintained.

[0169] The straight guidance of the guide carriages 13 of the guide device 11 perpendicular to the web plane 8 also enables very short paths for the movement of the warp threads 15 and, in conjunction with the aforementioned fast-acting linear drives of the guide carriages 13, consequently results in a particularly effective alternating of the warp threads 15 on both sides of the web plane 8.

[0170] The Figuren 2a, b The figures show two operating phases of the weaving process in the circular weaving machine with changing positioning of the guide carriages 11 with the warp threads 15 during the rotation of the two shuttles 19 by 180° each.

[0171] During the operational phase after Fig. 2a The two rotating shuttles 19 are located in the 6 o'clock and 12 o'clock positions of the circular weaving machine, with some guide carriages 13, including the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position, having the warp thread 15 in the image plane to the right of the orbit 3 and other guide carriages 13, including the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position, having the warp thread 15 in the image plane to the left of the orbit 3, so that the space for the passage of the shuttles 19 at the 6 o'clock and 12 o'clock positions is cleared by the warp threads 15 spread from the web plane 8, forming a shed.

[0172] However, any number of guide carriages 13, for example every second, third or all guide carriages 13 of the guide devices 11, can be located in the image plane to the right or left of the orbit 3 during a revolution of the guard 19.

[0173] Fig. 2b The figure shows the operating phase of the circular weaving machine, in which the contactor 19, previously at the 6 o'clock position, passes through the 12 o'clock position and vice versa, with some guide carriages 13, including the guide carriage 13 of the guide devices 11 arranged in the 6 o'clock and 12 o'clock positions, being located with the warp thread 15 in the plane of the image to the right of the orbit 3, while the contactors 19 pass through the 6 o'clock and 12 o'clock positions.

[0174] However, any number of guide carriages 13, for example every second, third or all guide carriages 13 of the 12 guide devices 11, can be located in the image plane to the right or left of the orbit 3.

[0175] Furthermore, the contactors 19 can rotate around the guide rails 7 at symmetrical or asymmetrical distances to each other.

[0176] The warp threads 15 are alternately spread in opposite directions in the aforementioned or another alternating mode of the guide carriages 13, resulting in an undulation of the warp threads 15 with the weft threads 22 of the shuttle 19 rotating on the orbit 3 in a specific mode, to produce a hollow-profile fabric 25 with the desired weave pattern, as shown in Fig. 2a, b depicted.

[0177] The non-uniformly profiled weaving core 1a can be moved axially along the weaving axis 2 during the weaving process, whereby the fabric 25 is laid in a stationary position on the weaving core 1a. Depending on the desired weaving result, the axial movement of the weaving core 1a can be, for example, quasi-stationary, discontinuous, or continuous. A forward and backward movement of the weaving core 1a to generate multiple fabric layers 25 is also possible.

[0178] During its axial movement, the weaving core 1a can additionally be rotated about its weaving core axis 17 or tilted to the weaving axis 2 in order to create a changed angular position of the warp threads 15 and the weft threads 22 of e.g. + / - 60° to the weaving core axis 17 on the weaving core 1a.

[0179] The in Fig. 2a, b The uniform weaving structure shown, resulting from a uniform weaving mode, can be changed by means of the individual drive and control of both the shuttle carriage 20 and the guide carriage 13 and the weaving core 1a, even during the weaving process.

[0180] The carriages 20 can rotate very precisely and evenly by means of the guide rails 7 and at the same time apply a high thread tension to the weft thread 22 being carried.

[0181] The narrow gaps 18 in the orbit 3 for the passage of the warp threads 15 can be easily and largely without affecting the shuttle carriage 20 by means of the large number of widely spaced, rubberized guide rollers, so that the uniform rotation of the shuttle 19 is not impaired.

[0182] The rapid, alternating spreading of the warp threads 15 by means of the guide carriages 13 which can be operated over short distances makes it possible to increase the running speed of the shuttles 19 which rotate on the guide rails 7.

[0183] After weaving the core 1a, it can be removed sideways from the circular loom and the circular loom can be equipped with another core to be woven.

[0184] The aforementioned advantages of the circular weaving machine lead to high process efficiency and also enable the weaving of the weaving core 1a with a very tightly tensioned fabric 25.

[0185] Therefore, the circular weaving machine is particularly suitable for weaving large, irregularly contoured weaving cores with contour-conforming technical fabrics, such as for the production of woven hollow profiled fiber preforms for wheel rims.

[0186] The Figuren 3 , 4 und 5 show a second embodiment of the circular weaving machine according to the invention, here for weaving a cylindrical weaving core 1b.

[0187] The above description of the first version of the circular weaving machine also applies to the circular weaving machine described here according to the second version with regard to the matching features and their advantages, so that reference is made to the corresponding descriptions in this respect.

[0188] To avoid repetition, only the differences compared to the first version of the circular weaving machine are described below. Fig. 1 , 2a, b described.

[0189] In this design, the warp bobbin devices 9 are fixed to the housing, essentially in extension of the radial extent of the circular orbit 3 on an outer wall of the machine housing 6 of the circular weaving machine.

[0190] The after Fig. 3 and 4 The 12 warp spool devices 9 provided are arranged essentially centrally in the extension of the web plane 8 of the orbit 3.

[0191] The after Fig. 5 The 24 warp spool devices 9 are arranged in pairs, side by side in the axial direction, wherein the mirror line of a pair of the warp spool devices 9 is arranged substantially centrally in the extension of the web plane 8.

[0192] The 12 warp bobbin devices 9 after Fig. 3 and 4 are each assigned to a movable, travelable guide device 11, so that one warp thread 15 is guided per guide device 11.

[0193] The 24 warp bobbin devices 9 after Fig. 5 are assigned in pairs to a movable, travelable guide device 11, so that two warp threads 15 are guided per guide device 11.

[0194] For the sake of clarity, the following are included: Figuren 4 und 5 Only the warp bobbin devices 9 and associated guide devices 11 in the 12 o'clock position of the circular weaving machine are shown and further described.

[0195] The guide carriage 13 of the guide device 11 after Fig. 4 und 5 Each has a thread guide element 14 with a radially directed thread channel 14, to which the thread outlet 16 is connected. The warp bobbin device 9 Fig. 4 The provided warp threads 15 each run individually through a radially directed thread channel 14 of a guide carriage 13 and from the warp bobbin device 9 to Fig. 5 The provided warp threads 15 run in pairs through a radially directed thread channel 15 of a guide carriage 13.

[0196] During the alternating lateral movement of the guide carriage 13 to change the warp thread positions, the radially directed thread channel 14 with the warp thread 15 or the two warp threads 15 is alternately in a position to the right and left of the orbit 3 or the web plane. 8.

[0197] During the lateral movement, momentary intermediate positions of the thread channel 14 occur, as z.B. a central position in which the radially directed thread channel 14 is essentially in a straight line extension to the housing-fixed arrangement of the warp thread spool 10 of the warp spool device 9 and thus temporarily enables a deflection-free travel path of the warp thread 15 through the thread channel 14.

[0198] With this special guidance of the warp thread(s) 15, the necessary thread deflections and absolute thread length of the warp threads 15 are reduced, and in particular the different relative thread lengths resulting from the lateral movement of the guide carriages 14 are minimized, which further improves the maintenance of the thread tension of the warp threads 15.

[0199] When designing the circular weaving machine according to Fig. 3 bis 5 The weaving of a woven core 1b with a uniform, cylindrical core cross-section is provided as an example.

[0200] When weaving the cylindrical core 1b, it can, for example, be fixed in a stationary position during the weaving process, with the fabric 25 being continuously drawn off in the axial direction along the weaving axis 2 of the rotary loom or along the path axis 17 of the core 1b. Preferably, the core 1b is aligned in an axial position congruent with the weaving axis 2.

[0201] In the execution according Fig. 5 Furthermore, an exemplary housing-mounted weaving ring 26 is arranged concentrically spaced around the weaving core 1b, which further homogenizes the supply of the warp threads 15 and weft threads 22 to the weaving point by damping their thread vibrations and compensating for their thread tension fluctuations, which is particularly advantageous in circular weaving machines with a larger diameter of the orbit 3 and thus with a greater distance between the weft thread spool 21 and the thread outlets 16 of the thread guide elements 14 of the guide devices 11 from the weaving core 1b.

[0202] The Figuren 6 , 7a, b show a third embodiment of the circular weaving machine according to the invention for weaving a cylindrical weaving core 1b.

[0203] The above description of the second version of the circular weaving machine also applies to the circular weaving machine described here according to the third version with regard to the matching features and their advantages, so that reference is made to the corresponding descriptions in this respect.

[0204] To avoid repetition, only the differences compared to the second version of the circular weaving machine are described below. Fig. 3 bis 5 described.

[0205] In this design, the 12 warp spool devices 9 are arranged on each of the 12 guide carriages 11 and are carried along with it in a piggyback principle.

[0206] The warp bobbin device 9 is arranged on the guide carriage 13 in such a way that the warp thread bobbin 10 is essentially in a straight line extension to the radially directed thread channel 14 and thus always enables a deflection-free travel path of the warp thread 15 through the thread channel 14.

[0207] The Figuren 7a, b The figures show two operating phases of the weaving process in the circular weaving machine with changing positioning of the guide carriages 13 with the warp bobbin devices 9 during the rotation of the two gates 19 by 180° each.

[0208] During the operational phase after Fig. 7a The two rotating gates 19 are located in the 6 o'clock and 12 o'clock positions of the circular weaving machine, with the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position, together with the warp bobbin device 9 and the warp thread 15, being located in the plane of the image to the right of the orbit 3, and the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position, together with the warp bobbin device 9 and the warp thread 15, being located in the plane of the image to the left of the orbit 3, while the gates 19 pass through the 6 o'clock and 12 o'clock positions.

[0209] Fig. 7b The figure shows the operating phase of the circular weaving machine, in which the contactor 19, previously located at the 6 o'clock position, passes through the 12 o'clock position and vice versa, whereby, among other things, the guide carriages 13 of the guide devices 11 arranged in the 6 o'clock and 12 o'clock positions with the warp bobbin device 9 and the warp thread 15 are now located in the plane of the image to the right of the orbit 3, while the contactors 19 pass through the 6 o'clock and 12 o'clock positions.

[0210] The Figuren 8a, b, c show a fourth embodiment of the circular weaving machine according to the invention for weaving a cylindrical weaving core 1b.

[0211] The above description of the third version of the circular weaving machine also applies to the circular weaving machine described here according to the fourth version with regard to the matching features and their advantages, so that reference is made to the corresponding descriptions in this respect.

[0212] To avoid repetition, only the differences compared to the third version of the circular weaving machine are described below. Fig. 6 , 7a, b described.

[0213] The circular weaving machine according to this embodiment has two circular orbits 3.1, 3.2 arranged parallel to each other for the rail-guided circulation of two shuttles 19 each.

[0214] A total of 12 guide devices 11 are assigned to the two orbits 3.1, 3.2, each carrying a chain spool device 9 arranged on the respective guide carriage 13.

[0215] The base body 12 of each guide device 11 extends axially over the two track bodies 4.1, 4.2 of the orbits 3.1, 3.2, so that the guide carriage 13 and the entrained warp thread 15 of each guide device 11 can cross both track bodies 4.1, 4.2 and thus both track planes 8.1, 8.2 along the base body 12 and according to the exemplary operating phase after Fig. 8a in the image plane to the left of the first orbit 3.1, corresponding to the operating phase after Fig. 8b midway between the first and second orbits 3.1, 3.2 and according to the operational phase after Fig. 8c can be positioned to the right of the second orbit 3.2.

[0216] The Figuren 9a, b, c show a fifth embodiment of the circular weaving machine according to the invention for weaving a cylindrical weaving core 1b.

[0217] The description of the fourth version of the circular weaving machine also applies to the circular weaving machine described here according to the fifth version with regard to the matching features and their advantages, so that reference is made to the corresponding above statements in this respect.

[0218] To avoid repetition, only the differences compared to the fourth version of the circular weaving machine are described below. Fig. 8a, b, c described.

[0219] In this embodiment, the 12 guide units 11 each have two guide carriages 13.1, 13.2, each with a thread guide element 14.1, 14.2 as a radially directed thread channel 14.1, 14.2. A warp bobbin assembly 9 is arranged on each of the 24 guide carriages 13.1, 13.2, which guide the guide carriages 13.1, 13.2 along with them.

[0220] The two guide carriages 13.1, 13.2 of each guide device 11 can be positioned arbitrarily along the base body 12 which extends over both track bodies 4.1, 4.2 of the orbits 3.1, 3.2.

[0221] For example, it is in the operational phase after Fig. 9a the first guide carriage 13.1 and its accompanying warp thread 15 in the image plane to the left of the first orbit 3.1 and the second guide carriage 13.2 and its accompanying warp thread 15 in the middle between the first and the second orbit 3.1, 3.2.

[0222] During the operational phase after Fig. 9b The first guide carriage 13.1 and its accompanying warp thread 15 are located, for example, in the middle between the first and the second orbit 3.1, 3.2, and the second guide carriage 13.2 and its accompanying warp thread 15 are located to the right of the second orbit 3.2.

[0223] During the operational phase after Fig. 9c The first guide carriage 13.1 and its accompanying warp thread 15 are again in the position to the left of the first orbit 3.1, while the second guide carriage 13.2 and its accompanying warp thread 13.2 have remained in the position to the right of the second orbit 3.2.

[0224] In the implementations according to the fourth and fifth embodiments, an even greater variety of possible web modes and generateable web structures can be realized while maintaining high web speed and web quality.

[0225] The Figuren 10a, b show a circular weaving machine not according to the invention, here for weaving a contoured, two-part weaving core 1a, analogous to the first embodiment of the circular weaving machine according to the Figuren 1 , 2a , b.

[0226] The description of the first version of the circular weaving machine also applies to the circular weaving machine described here with regard to its matching features and advantages, so reference is made to the corresponding preceding statements in this respect.

[0227] To avoid repetition, only the differences compared to the first version of the circular weaving machine are described below. Figuren 1 , 2a, b described.

[0228] In addition to the 12 warp bobbin devices 9 fixed to the housing, 12 movable, pivotable guide devices 11 are provided as an alternative, which are arranged concentrically around the central weaving axis 2 of the circular weaving machine, outside the circular orbit 3 or the web plane 8 and essentially in extension of the radial extent of the orbit 3 or the web plane 8 on an outer wall of the machine housing 6 of the circular weaving machine.

[0229] The pivotable guide devices 11 each have a housing-fixed rotary joint 27 as a base body 27 and a positioning part 28 rotatably mounted on the rotary joint 27, which in the embodiment is designed as a pivot arm 28.

[0230] The swivel arm 28 has at its free end a thread guide element 29 for guiding and directing the warp thread 15 in the form of a thread guide eyelet 29, through which the warp thread 15 is guided.

[0231] By means of the alternately pivotable swivel arm 28 with the thread guide eyelet 29, the warp thread 15 can be alternately moved to both sides of the segmented orbit 3 to form the thread ply, whereby only a single thread deflection is required with low friction in the thread guide eyelet 29.

[0232] The longer the swivel arm 28 is designed, the smaller the radius of the travel path of the thread guide eyelet 29 and thus of the path of the warp thread 15.

[0233] The feeding of the warp threads 15 from the warp thread spools 10 via thread guide eyelet 29 to the weaving point on the weaving core 1a is therefore also largely straight, whereby the thread tension of the warp threads 15 can be maintained at a high level.

[0234] The alternating movement of the swivel arm 28 of each guide device 11 can be carried out analogously to the design according to Fig. 1 , 2a, b individually, e.g. via individual, bidirectional, switchable direct drives, generated and controlled (not shown).

[0235] In Fig. 10a, b The two rotating guns 19 are shown schematically in the 6 o'clock and 12 o'clock positions along the orbit 3.

[0236] For the sake of clarity, the following are included: Figuren 10a, b only two warp bobbin devices 9 and the associated swiveling guide devices 11 are shown, namely the warp bobbin devices 9 and guide devices 11 arranged in the 6 o'clock and 12 o'clock positions of the circular weaving machine.

[0237] The Figuren 10a, b The two operating phases of the weaving process in the circular weaving machine show changing positioning of the swivel arms 28 with the thread guide eyelets 29 leading the warp threads 15 during the rotation of the two shuttles 19 by 180° each.

[0238] During the operational phase after Fig. 10a The two rotating gates 19 are located in the 6 o'clock and 12 o'clock positions of the circular weaving machine, with, among other things, the pivot arm 28 with the warp thread 15 in the thread guide eyelet 29 of the guide device 11 arranged in the 12 o'clock position being pivoted out to the right of the orbit 3 in the image plane, and, among other things, the pivot arm 28 with the warp thread 15 of the in 6-The guide device 11, arranged at the o'clock position, is swung to the left of the orbit 3 in the image plane, so that the space for the passage of the gates 19 at the 6 o'clock and 12 o'clock positions is cleared by the warp threads 15 spread out from the plane 8, forming a gusset.

[0239] Fig. 10b The figure shows the operating phase of the circular weaving machine, in which the contactor 19, previously located at the 6 o'clock position, passes through the 12 o'clock position and vice versa, whereby, among other things, the swivel arms 28 with the warp threads 15 of the guide devices arranged in the 6 o'clock and 12 o'clock positions are swung out to the right of the orbit 3 in the plane of the image, while the contactors 19 pass through the 6 o'clock and 12 o'clock positions. Reference symbol list

[0240] 1 Web core, non-uniform a, cylindrical b 2 weaving axis of the circular weaving machine 3 circular orbit, first .1, second .2 4 Track body first .1, second .25 Track segment 6 Machine housing 7 Guide rail 8 Track level, first .1, second .2 9 Warp bobbin assembly 10 Warp thread bobbin 11 Guide assembly 12 Base of guide assembly 13 Positioning part, guide carriage first .1, second .2 14 Thread guide element, thread guide channel, thread channel, first .1, second .2 15 Warp thread 16 Thread exit 17 Core axis 18 Recess of the orbit, joint 19 Shuttle 20 Shuttle carriage 21 Weft thread bobbin 22 Weft thread 23 Guide roller 24 Passage of the base assembly 25 Fabric 26 Weft ring 27 Base of guide assembly, swivel joint 28 Positioning part, swivel arm 29 Thread guide element, thread guide eyelet

Claims

1. Circular loom for weaving a weaving core with at least one shuttle (19), which has a weft thread spool (21) and can be moved along a circular orbit path (3) around the weaving core (1), wherein at least one guide device (11), designed to guide at least one warp thread (15) provided from a warp thread spool (10) of a warp spool device (9), is provided, which is movably arranged or designed outside a track plane (8) enclosed by the outer circumference of the circular orbit path (3), wherein only the guided warp thread (15), passing through a recess (18) in the circular orbit path (3) by crossing the track plane (8), characterised in that a thread guide element (14) of the movable guide device (11) is designed as a thread guide channel (14) or a thread guide groove.

2. Circular loom according to claim 1, characterised in that the thread guide channel (14) or the thread guide groove is designed to extend in the direction of the weaving axis (2).

3. Circular loom for weaving a weaving core with at least one shuttle (19), which has a weft thread spool (21) and can be moved along a circular orbit path (3) around the weaving core (1), wherein at least one guide device (11), designed to guide at least one warp thread (15) provided from a warp thread spool (10) of a warp spool device (9), is provided, which is movably arranged or designed outside a track plane (8) enclosed by the outer circumference of the circular orbit path (3), wherein only the guided warp thread (15), traversing the track plane (8), passing through a recess (18) in the circular orbit path (3), characterised in that at least one warp spool device (9) is arranged on the movable guide device (11).

4. Circular loom according to claim 3, characterised in that a thread guide element (14) of the guide device (11) is designed as a thread guide channel (14) or a thread guide groove.

5. Circular loom according to claim 4, characterised in that the thread guide channel (14) or the thread guide groove is designed to extend perpendicular to the weaving axis (2).

6. Circular loom according to one of claims 1 to 5, characterised in that the movable guide device (11) has at least one positioning part (13) arranged or formed to be movable parallel to the weaving axis (2) of the circular loom.

7. Circular loom according to claim 5, characterised in that the positioning part (13) is designed to be linearly movable.

8. Circular loom according to one of claims 1 to 7, characterised in that the warp thread spool (10) of at least one warp spool device (9) is arranged essentially in a straight extension of the path of the warp thread (15) through the thread guide element (14) and / or essentially in a straight extension of the travel path of the thread guide element (14).

9. Circular loom according to one of claims 1 to 8, characterised in that the warp thread spool (10) of at least one warp spool device (9) is arranged essentially in a lengthening of the radial extent of the circular orbit path (3).

10. Circular loom according to one of claims 1 to 9, characterised in that the circular orbit path (3) has at least one guide rail (7) or is formed by at least one guide rail (7), in or on which at least one shuttle (19) is guided.

11. Circular loom according to one of claims 1 to 10, characterised in that the guiding and / or the drive of the shuttle (19) is designed to be magnetic and / or electromagnetic.

12. Circular loom according to one of claims 1 to 11, characterised in that a second circular orbit path (3.2) is provided, along which in each case at least one shuttle (19) is movable, where the guided warp thread (15), crossing the track planes (8.1, 8.2) of the first and / or second orbit path (3.1, 3.2), passes through the recess (18) of the first and / or second circular orbit path (3.1, 3.2).