EP3770311B1 - Circular loom with trajectory - Google Patents

Description

The invention relates to a circular loom for weaving a weaving core with at least one shuttle which has a weft thread bobbin and can be moved around the weaving core along a circular orbit.

The known circular looms and weaving processes on circular looms are used to produce hollow-profile, tubular textile fabrics for fire hoses, water hoses, sacks or wheel rims, etc., for example.

A circular loom of the type mentioned is from the publication WO2017/190739 A1 known.

One or more shuttles, each with a weft thread spool, are moved along a circular orbit, which guides the weft thread in a circular path around the weaving core.

Such circular looms are also equipped with warp bobbin devices. Warp spool devices essentially have, in addition to a warp thread spool with warp thread, a holder for the warp thread spool (warp spool holder) and a thread tensioning device.

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

The warp bobbin devices are designed to be movable, with the travel path of the warp bobbin devices taking place through the weaving plane in order to form a so-called fold of the warp threads through their alternating positioning and to produce an interweaving with the weft thread. A separate thread guide or thread deflection of the warp threads is largely omitted.

With this circular loom, a fabric of high weaving quality and variability that sits tightly on the weaving core can be produced under high thread tension of the weft threads and warp threads.

However, it has been shown that the ability to move the warp bobbin devices through the weaving plane is structurally very complex, with the maintenance of a uniform thread tension during the movement of the warp bobbins relative to the weaving plane and the weaving core making high technical demands on the design of the circular loom.

In addition, the transfer of the warp bobbin devices requires an increased mechanical and control effort. In addition to the necessary control of an acceleration and braking process of the quite large masses, the rapid transfer of the warp bobbin devices and the rapid exit of the warp bobbin devices and their positioning devices from the weaving plane for passing the weft thread bobbin also mean a high level of design effort, with the transfer - and Extension times limit the maximum possible speed of the weft spool.

For the circular loom according to the publication FR2339009A1 the warp bobbin devices are pivotably mounted on a peripheral housing, the warp threads being fed to the weaving core or the weaving plane alternately fanning out by means of thread guide tubes which are connected to the pivotable warp bobbin devices, in that the thread guide tubes change the direction of the track for the circulation of the shuttles cross. For this purpose, the track is provided with wide slits for the thread guide tubes to pass through, with the thread guide tubes taking up their changing positions along the slits.

This circular loom also requires complex mechanical and control engineering for the movement of the warp bobbin devices, with the speed of the shuttles being limited by the throughput times of the thread guide tubes.

In addition, the pivoting of the thread guide tubes, in which the warp thread is guided at different angles to the outlet of the thread guide tube and rubs against the inner wall of the tube, leads to a not inconsiderable wear of the thread. Because of this risk of damage, such circular looms are unsuitable for processing particularly sensitive threads, such as carbon fibers. This largely prevents the use of these circular weaving machines for producing fiber preforms for fiber composite products.

When pivoting the thread guide tubes in the manner of a circular arc, the thread tension of the warp thread decreases significantly near the weaving point, which can lead to a very loose weave and an unclean weave pattern with tangles.

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 shooter over the slots and consequently to a very lead to inhomogeneous circulation of the shooters, which in turn leads to undesirable vibrations in the circular loom and to further thread tension fluctuations.

Another circular loom is out US 920 728 A known. This includes a frame, warp guides and means for their movement. The rack carries an orbit for the shooter. The means for moving the warp guides also move the shuttles through the sheds.

The invention is based on the object of providing an improved circular weaving machine which eliminates the disadvantages of the prior art and which, in particular, enables higher weaving productivity with simpler structural means.

Another object is to ensure improved functionality of the circular weaving machine for producing a hollow-profile-like fabric with high weaving quality and variability.

The object is achieved according to the invention by a circular weaving machine with the features of patent claim 1, according to which the revolving path is formed by first web segments arranged in a row along their circumference and at least one movably arranged or designed guide device is provided, which guides at least one of a warp thread bobbin of a warp bobbin device provided warp thread and on which at least a first path segment of the circulating path and at least one second path segment that can be assigned as a substitute to the circulating path are arranged and guided, wherein in the guided absence of the first and second path segment from the circulating path the guided warp thread, crossing the path plane, passes the circulating path.

One or more shuttles move with their weft spools along the 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.

The contactor(s) can actively, e.g. B. preferably by means of its own direct drive, move along the orbit, or the contactor (s) can be passive, e.g. B. means an externally driven, mechanical driver or by means of an electromagnetic drive, are transported and controlled along the orbit.

The circular orbit is preferably arranged radially (perpendicular to the weaving axis) in relation to the axially directed weaving axis of the circular weaving machine, as a result of which the circular weaving machine has a particularly narrow design.

For certain uses of the circular loom, however, it can be advantageous to arrange the circular orbit quasi-radially (at an angle other than 90° to the weaving axis).

The radially outer circumference of the circular orbit forms the radial boundary of the path plane of the circular loom, within which the orbit of the shuttle with the weft thread is effected. The axially outer width of the circular orbit forms the axial boundary of the path plane of the circular loom, within which the orbit of the shuttle with the weft thread is effected. The outer boundary points of the circular orbit essentially describe the orbital plane as a circular disc.

The guiding device according to the invention is preferably located outside the plane of the path and is movably arranged or designed to be movable in a fixed arrangement, whereby preferably only the path segments carried along with the guiding device are conveyed out of or into the orbit (path plane) and the warp thread guided by the guiding device during the Absence of an orbital segment in the orbit crossing the orbital plane of the orbit.

However, components or aids of the guide device, for example aids for guiding the path segments and/or the warp thread, can also cross the path plane of the revolving path.

The movable guide device can, for example, be fastened or movably mounted on a radial outer wall of the machine housing of the circular loom or on the radially outer circumference of the circular orbit.

Preferably, a plurality of guiding devices are arranged around the circumference of the circular orbit.

The guide device according to the invention carries at least a first and a second track segment in pairs with it, in order to be able to exchange the first track segment of the orbit for the second, alternative track segment and vice versa in an alternating travel movement, and thus to be able to complete the orbit in each change position.

On the other hand, the guiding device according to the invention assumes the guiding and alternating positioning of at least one warp thread (warp thread guide) between its provision by the warp thread spool(s) of the warp spool device(s) and its weaving with the weft thread at a weaving point on the weaving core.

The weaving point describes the variable point at which the warp threads are temporarily interwoven with the weft threads on the surface of the weaving core.

The circular orbit according to the invention is formed by arranging a large number of individual, arc-shaped path segments in a row and is therefore in itself multi-part/segmented. One path segment of the orbit and a second path segment associated with this first path segment are arranged on the movable guide device and guided by the latter, so that these, like the guided warp thread, are repositioned by the guide device.

The orbital segments of the orbit are referred to as first orbital segments; which correspond to the first orbital segments of the orbit in preferably the same number of associated, alternative path segments are referred to as second path segments.

The second track segment arranged on the guide device is designed in cooperation with the alternately movable guide device as a temporarily acting replacement track segment of the first track segment of the circular orbit. During the alternating movement of the guide device, the second track segment briefly replaces the first track segment in the circular orbit, with the relevant track segments being positioned outside of the track plane during the phase of replacing the track segments, and in this absence of the track segments from the track temporarily interrupting the orbit A defect occurs in the orbit, which the warp thread carried along by the guide device can use to cross the temporarily interrupted orbit, or the orbit plane. At the end of an alternating movement of the guide device, the warp thread has changed the side of the orbit and the orbit is alternatively closed by the second track segment, while the contactor(s) can then traverse the closed orbit unhindered.

The temporary defect in the orbit is a local interruption, generated along the circumference of the orbit, of the orbital orbital segments, which are otherwise arranged homogeneously in a row, by a temporarily missing orbital segment.

The void may be a physically completely empty space (void) along the orbit; however, components or aids of the orbit, such as guide elements for guiding the web segments, or components or aids of the guide device, eg for guiding the web segments and/or the warp thread, can also be temporarily present at the defect.

A first and a second track segment are preferably guided in pairs and together with a warp thread arranged between the pair of track segments by means of the guide device and are designed as a guided unit.

One guide device can be provided for guiding one pair of web segments and one warp thread (guided unit) or one guide device for guiding several pairs of web segments and/or several warp threads.

Each guide device can be moved relative to an adjacently arranged guide device, with which the first track segments can also be moved relative to one another and the second track segments can also be moved relative to one another.

The guide device acts in particular separately from the design and function of the warp bobbin device(s).

While the warp threads are guided and moved by the guiding device(s), the required thread tension of the warp threads is essentially maintained by the thread tensioning device of the warp spool devices, whereby the positioning of the warp spool devices can be stationary and locally variable.

Thus, the warp bobbin devices can be stationary, e.g. fixed to a housing part of the circular loom, or they can also be arranged to be mobile at different positions in relation to the housing of the circular loom.

The warp bobbin devices are preferably located in the immediate vicinity of the plane of the web in order to be able to feed the warp threads to the weaving point on the weaving core in the shortest possible way.

There can be one guide device each for guiding one warp thread of a warp bobbin device or one guide device each for guiding several warp threads be provided a group of involved warp coil facilities.

If a group of warp bobbin devices is provided, which is associated with a guide device, these warp bobbin devices can be arranged next to one another, one behind the other or one above the other in relation to the direction in which the warp threads are guided toward the guide device.

If the guide devices are provided in the same number as the warp bobbin devices to be operated on the circular loom and are each functionally assigned to them, each warp thread is guided separately by a respective guide device.

By means of the movable guide device(s), the warp threads drawn off from the warp thread spools can be brought - without having to move the warp spool devices - in short distances, quickly and with little effort on both sides of the orbit and thus the track plane, with a warp thread carried along by the guide device subsequently crosses the path plane, in which the warp thread leaving the guide device, for example via a thread outlet, passes the circular orbit at a gap between the path segments of the orbit that was temporarily created during the removal of a path segment of the orbit from the orbit plane.

In this way, the warp threads on both sides of the web plane can be spread and fanned out in opposite directions, for example, in order to form a warp thread fold while maintaining a high thread tension, with the warp threads in the exchange positions outside the web plane preventing the passage of the shooter(s) is ensured along the temporarily closed orbit, after which the warp threads are undulated / interwoven with the weft thread running through the warp thread fold, which is drawn off from the weft thread spool of the shuttle carried along the orbit, on the weaving core. Various types of Web patterns are formed on the core to be woven.

With the design of the circular loom according to the invention, the weaving process can be significantly accelerated and a higher productivity can be achieved.

The arrangement of the first and second path segments can be designed as closely as possible to one another and in particular the outlet of the warp thread formed between the first path segment and the second path segment can be designed so close to the orbit or the lateral, axial boundary of the path plane that in the resulting Changing positions of the warp threads allow the shuttles to pass without touching the warp threads, after which the web segments can be exchanged, the warp thread positions changed and the shuttles rotated even faster, which accelerates the weaving process and further increases the productivity of the circular loom.

The possibility of positioning the warp threads close to the orbit also causes the warp threads to run at a very shallow angle (weaving angle) in relation to the extent of the plane of the web, so that the thread tension of the warp threads remains largely constant even through the narrow position change, which is advantageous for high weaving quality .

Furthermore, the non-contact and deflection-free guidance and passage of the warp threads through the orbit causes gentle treatment of the warp thread material, so that sensitive thread materials such as carbon fibers can also be processed well.

The first path segments of the circular orbit and also the second path segments that can be assigned as an alternative can be arranged in a row almost flush and almost without a gap when viewed in the direction of the circumference of the orbit and can be designed to be movable in their relative movement to one another, e.g.

The almost gap-free design of the orbit enables the contactor(s) to run very quietly and quickly, so that the contactor(s) can rotate in the orbit at high speed with almost no vibration and thus while maintaining a high yarn tension and the aforementioned increase in productivity and quality can be further improved.

As a result, with this circular weaving machine at a very high operating speed and with a high thread tension of the weft threads and the warp threads, a fabric of improved weaving quality that sits tightly on the weaving core can be produced.

As a result of the feasibility of a consistently high thread tension of the weft threads and the warp threads, the circular loom according to the invention is particularly suitable for weaving loom cores with a cross-sectional geometry that can be changed in the axial direction (in the direction of the axis of rotation of the loom core (loom core axis)), since the tightly woven threads conform to a contour can create changing Webkern contour.

To weave a loom core contoured in this way with a fabric that remains stationary, the loom core is moved along the weaving axis of the circular loom in order to be able to weave the complete contour of the loom core. The weaving point where the warp yarns interweave with the weft yarns on the surface of the weaving core not only migrates around the circumference of the rotating weaving core but also along its weaving core axis.

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

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

Due to the advantages described above, the circular loom according to the invention is also suitable for the production of hollow profile-like, fiber-containing fabric preforms of fiber composite products, such as for the production of woven preforms for wheel rims made of fiber composite material.

Advantageous configurations and developments of the circular weaving machine emerge from the dependent patent claims, the following description and the associated drawings.

According to an advantageous embodiment of the circular weaving machine, a first track segment of the revolving track and a second track segment that can be assigned as an alternative to the revolving track are designed identical to one another.

The identical design of the second track segment that replaces the first track segment of the orbit homogenizes the design of the orbit that is closed as a result and improves the running properties and smooth running of the contactor running along the circular orbit.

According to a further advantageous embodiment of the circular weaving machine, the guide device has at least one positioning part that is arranged or designed to be movable or pivotable.

At least a first and a second track segment can be arranged on the positioning part.

The positioning part can be reciprocally moved or pivoted relative to a base body of the guide device or relative to the machine housing of the circular loom or relative to the circular orbit by means of a corresponding structural design of the guide device and thereby entrain the first and second track segment.

It is also possible for several pairs of track segments to be connected from the first and second track segments to a positioning part.

Furthermore, the guide device and/or the positioning part can preferably be equipped with at least one thread guide element.

The thread guide element of the guide device is provided for the actual steering and guidance of at least one warp thread during its alternating movement and carries with it a warp thread running off the warp thread spool or several warp threads running off warp thread spools, possibly also with a thread deflection.

The thread guiding element can be connected to the positioning part or can be designed to be integrated in the positioning part.

One or more thread guide element(s) can be arranged or formed on the positioning part of the guide device.

The warp thread can also be guided and positioned by means of a positioning part of the guide device, which a warp thread spool directly entrained, with a thread guide element or a thread outlet possibly being dispensable.

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 in each case.

According to a structurally favorable embodiment, the thread guide element can preferably be designed as a thread guide channel, as a thread guide groove or as a thread guide eyelet, through which the warp thread is guided in each case.

The thread guiding element can guide the warp thread, e.g. axially or radially, and end with a thread outlet of the warp thread. A thread outlet is an exit opening at the exit of the guided warp thread from the thread guide element of the positioning part.

To guide the warp thread, the thread guide element can preferably be arranged and formed on or in a positioning part of the guide device that is mounted such that it can move or pivot.

The positioning part of the guide device can be, for example, a movable guide carriage or a pivotable guide arm or a rotatable guide cylinder, on which the pair(s) of web segments are arranged and one or more thread guide element(s) are arranged or formed. For example, the rotatable guide cylinder may comprise the pair(s) of web segments and further one or more thread guide element(s) in a turret arrangement.

In the case of, in particular, the first and second track segments arranged at a defined distance from one another on the positioning part, it can prove to be advantageous that these track segments are arranged spaced parallel to one another, so that in addition to a resulting space saving in the circular loom, the assignment of the second web segment to the orbit in replacement of the first web segment can be done with particularly little positioning effort.

Preferably, the movement or pivoting of the positioning part and then the entrained web segments and the guided warp thread takes place parallel to the weaving axis or with the axis of rotation perpendicular to the weaving axis of the circular loom.

This results in the driving or pivoting path of the interchangeable path segments and the thread guide path of the warp threads essentially perpendicular to the path plane of the orbit.

In this way, the path and the travel time of the web segments to be exchanged and the path and the travel time of the warp threads to cross the web plane can be shortened, so that the exchange speed of the web segments and the exchange speed of the warp threads and consequently the rotational speed of the shuttle can be increased.

According to an advantageous embodiment, the positioning part of the guide device is designed to be linearly displaceable, with the result that the web segments that are carried along and the warp thread that is guided are linearly moved/guided.

Linear mobility of the positioning part, or the movement or displacement of a guided unit, e.g. consisting of positioning part, first and second web segment and warp thread guide, can be carried out relatively easily in terms of design and control technology.

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, for example, can be operated pneumatically by pneumatic cylinders or can be operated electrically by electric motors, with each positioning part being able to be driven individually.

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

These drives can realize strong acceleration, deceleration and fast operation changeover and thus cause a quick change of direction of the positioning part.

The guidance and/or the drive of the positioning part can also be designed magnetically and/or electromagnetically.

In addition, a linear movement of the warp thread causes lower thread tension losses than with non-linear movements of the warp threads, which further improves the quality of the woven product.

Preferably, the positioning part and the entrained web segments or the guided warp thread can be moved linearly in the axial direction along the weaving axis of the circular loom, which results in the path of the web segments or the path of the guided warp thread being exactly perpendicular to the path plane of the orbit.

In addition to the resulting additional space savings in the circular loom, the web segments can be exchanged over the shortest route and in the shortest travel time, and the path and travel time of the warp threads to cross the web plane can be shortened with the least possible deflections in a straight line, so that the exchange speed of the web segments and the changing speed of the warp threads and thus the rotational speed of the shuttle can be further increased.

The positioning part of the guide device can be attached to a base body of the guide device by means of appropriate bearing elements or mounted on a component of the machine housing or directly on the outer circumference of the circular orbit such that it can be moved or pivoted/rotated.

The base body of the guide device can in turn be arranged on a component of the machine housing or directly on the outer circumference of the circular orbit and be mounted there in a stationary or movable manner.

One or more positioning parts can be assigned to a base body.

If a base body is provided, which is arranged in the radial direction between the positioning part and the circular orbit, this is preferably designed and arranged in relation to the warp thread carried along with the positioning part in such a way that a non-contact passage of the guided warp thread through the base body in the direction of the circular Orbit is enabled.

For example, the base body can have a slit-like through-opening in association with the thread guide or the path of the thread outlet, so that the warp thread can pass through it, preferably without contacting the through-opening.

The bearing element(s) for the mobile or rotatable mounting of a positioning part, such as a guide carriage or a guide cylinder, can be, for example, one or more elongated or arcuate guide groove(s) of the base body or the component of the machine housing or the positioning part, which are arranged to extend in the direction of the provided straight or arc-shaped axis of movement for exchanging the path segments and correspond to corresponding guide bolts or guide web(s) of the positioning part or the base body or the component of the machine housing.

In particular, corresponding bearing elements designed in a dovetail shape (groove and tongue) can be provided.

The bearing element(s) can also be one or more guide rail(s) corresponding to rollers or bearing bushes.

The corresponding bearing elements are preferably designed in such a way that they slide or roll off one another or against one another with as little frictional resistance as possible, so that the positioning part can be moved and accelerated as easily and quickly as possible.

To this end, it is beneficial if the positioning part also has the lowest possible mass. In this regard, the material of the positioning part is preferably made of plastic or light metal.

Several bearing elements, such as elongate guide grooves, guide webs or guide rails, can be arranged parallel to one another, which makes the bearing and guidance of the guide carriage and thus the guidance of the web segments and warp threads even more precise and safer.

The bearing elements for mounting a guide carriage can be designed in accordance with known linear guides, such as the linear guides from Festo.

The bearing of the guided track segments of the revolving track for the exercise of their linear relative movement among one another can be effected, for example, by planar sliding surfaces facing one another.

The accuracy of the bearing and guidance of the web segments can be increased by a tongue and groove connection on the sliding surfaces facing one another.

The linear relative movement of the guided path segments among one another can be carried out relatively simply in terms of design and control with the aid of the guide device.

Furthermore, if the warp thread bobbin of at least one warp bobbin device is arranged essentially in a straight and therefore deflection-free extension of the travel path of the warp thread through the thread guide element and/or essentially in a straight and therefore deflection-free extension of the travel or pivoting path of the thread guide element, the version lead to an advantageous reduction in the thread deflections required overall in the course of the warp thread between the warp coil device and its passage through the thread outlet of the guide device.

In particular, on the one hand, the thread tension of the warp threads in question can be kept even more stable with lower thread tension losses and, on the other hand, the thread guidance can be implemented in a particularly gentle manner.

Thanks in particular to stable thread tension and careful 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.

An advantageous embodiment of the invention provides that the warp thread spool of at least one warp spool device is arranged essentially in the extension of the radial extent of the circular orbit.

In particular, the warp thread bobbin(s) of the warp bobbin device(s) is/are therefore not only arranged outside the circumference of the circular orbit, but essentially in a radial extension of the orbit, or the orbit plane.

The warp bobbins of a plurality of warp bobbin assemblies may be arranged in a radial star configuration around the outer periphery of the circular orbit.

The warp bobbin device(s) can, for example, be fastened to a radial outer wall of the machine housing of the circular loom.

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

The thread deflections of the warp threads to be carried out by the alternating 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 fewer fluctuations, which has the effect of a further advantageous contribution to constant thread tension.

A particularly advantageous embodiment of the invention provides that at least one warp bobbin device is arranged on the guide device and/or on a first and/or second web segment.

In this case, the warp bobbin device(s) is/are carried along directly by the guide device, preferably by the movable positioning part, and/or indirectly by a first and/or second web segment arranged on the guide device.

The warp coil device can preferably be carried by the movable guide device—piggybacking the principle—and/or held by the guide device or the track segment(s) in a section between the first and second track segment.

The warp coil device(s) can preferably be arranged and carried along on the movable positioning part(s) of the guide device(s).

One or more warp bobbin devices can be arranged on a guide device, in particular on a positioning part of the guide device, or on a web segment.

With the arrangement of the warp coil device, e.g. between a first and second web segment, the formation of a separate thread guide element or a thread outlet for the outlet of the warp thread from the guide device can be superfluous in a structurally favorable manner and, furthermore, in a technologically advantageous manner the warp thread can be guided directly and be guided from the warp thread spool to the weaving point without further deflections.

In the embodiment of the invention, a higher compactness of the circular loom can be achieved and the course of the warp thread can be further shortened and the number of necessary deflections in the thread guide of the warp thread can be minimized to the advantage of a further improved thread tension and thread protection, especially since the direct assignment of the warp bobbin Device for guiding device, the thread tension can be kept stable explicitly for the individual warp thread.

If several warp bobbin devices are carried along, two or more warp threads of the warp bobbin devices can be guided jointly or individually between a pair of web segments consisting of the first and second web segments, with the warp threads preferably passing a thread guide element of the guide device together or individually, or directly from the individual ones entrained warp thread spools are dissipated.

These combinations allow several, even different types of warp threads to be guided and weaved together, in particular while ensuring a substantially consistently high thread tension of the warp threads.

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.

According to the arrangement and design of the existing track segments of the circulating track, the guide rail is divided into ring-shaped rail segments, which are arranged as far as possible flush with one another and form the ring-shaped closed guide rail.

The contactor or contactors can rotate in or on the at least one ring-shaped guide rail, which defines the circular orbit, by means of rolling or sliding means, with the contactor or contactors rolling over the almost gap-free separation points between the individual rail segments of the ring-shaped guide rail , slide.

Accordingly, the almost gap-free separation points of the ring-shaped guide rail have hardly any influence on the crossing and thus on the smooth running of the contactors.

In order to increase the running accuracy, the contactor or contactors can also rotate in a plurality of guide rails arranged at a distance from one another by means of the rolling or sliding means.

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 contactor is just guaranteed without contact.

The guide rail is preferably designed as an internal runner rail, in which the contactor(s) revolve within the circular orbit radially delimiting the plane of the track.

Such an embodiment is also conceivable, in which the contactor(s) are integrated within a plurality of guide rails arranged at a distance from one another.

In all cases, the guide rail(s) offer a track that allows the shuttles to rotate with little vibration while maintaining a consistently high thread tension of the weft threads, which means that weaving operation that is as homogeneous as possible can be achieved at the same time as a high circulation speed.

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

According to a further advantageous embodiment of the invention, the guidance and/or the drive of the contactor on or in the circular orbit is designed magnetically and/or electromagnetically, e.g. similar to a known Transrapid travel system. Here, for example, a moving electro-magnetic field can be generated on the circular orbit, so that the contactor is guided and/or driven by means of a magnetic bearing and/or electromagnetic control in a rolling, gliding or non-contact floating manner along the electro-magnetic field and thus along the circular orbit .

In this way, in particular, the frictional resistances in the rotation of the contactors along the circular orbit and across the separation points can be further reduced.

According to a particularly advantageous embodiment, a second circular orbit is provided, along which at least one contactor can be moved, the second circular orbit being formed by second track segments arranged in a row along its circumference, the guide device being another of a warp thread spool a warp coil device and on which (in addition to at least a first track segment of the first orbit and a second track segment of the second orbit) at least one third track segment that can be assigned as an alternative to the second orbit is arranged and guided, with the guided absence of the second and third track segment from the second orbit the further guided warp thread, crossing the second orbit plane, passes the second orbit.

While the orbit segments of the first orbit are referred to as first orbit segments, the orbit segments of the second orbit are referred to as second orbit segments.

Furthermore, the alternative path segments assigned to the second path segments, preferably in the same number, are referred to as third path segments.

The radially outer circumference of the first circular orbit forms the radial boundary of the first path plane of the circular loom and the radially outer circumference of the second circular orbit forms the radial boundary of the second path plane of the circular loom, within which the circulation of at least one shuttle is effected.

Preferably, both at least a first track segment of the first orbit and at least a second track segment of the second orbit and also at least a third track segment are arranged on a movable guide device as a track segment trio and together with at least two warp threads carried between the three track segments form a guided one Unit.

The third track segment, which is arranged on the guide device in association with a second track segment of the second revolving track, interacts with the alternately movable track segment Guide device designed as a temporarily acting replacement path segment of the second path segment of the second circular orbit.

At the same time, the second track segment of the second track arranged on the guide device in association with a first track segment of the first track can act in cooperation with the alternately movable guide device as a temporary replacement track segment of the first track segment of the first track.

The warp threads provided by the warp thread devices and carried along with the guide device can cross the two track planes of the first and/or second circulation path, which is briefly opened due to the temporary relocation of the track segments, and thus change the sides of the circulation paths, while the first and second circulation path, e.g second or third track segment is closed as an alternative, in order to ensure that the shuttles can pass through the closed orbits in this changing position of the warp threads.

The guided warp threads can be moved by the guide device assigned to the two revolving paths, crossing the respective path levels alternately and according to any flow pattern.

In particular, during the alternating movement of the guide device, in addition to the change in position of a first warp thread carried along by the guide device, a first track segment of the first revolving track can be temporarily removed and replaced by a second track segment of the second revolving track, and at the same time, in addition to the position change of a second warp thread, a second track segment of the second revolving track temporarily outsourced and replaced by a third railway segment and vice versa.

In the phase of exchanging the track segments, the relevant track segments are shifted out of the track plane out of their respective orbit, whereby a temporary gap occurs in the respective orbit, which on the one hand the warp thread entrained between the first track segment and the second track segment and on the other hand the warp thread entrained between the second track segment and the third track segment can use to change the orbit, respectively to cross the orbit plane and thus change the side of the orbit, while the shooters can then freely traverse the first orbit, which is alternatively closed by the second orbit segment, or the second orbit, which is alternatively closed by the third orbit segment.

Each guide device can be moved relative to a guide device arranged adjacent to it, with which the guided units of both revolving paths can also be guided relative to one another.

Analogous to the embodiment with a revolving path, a guide device for carrying along a trio of track segments and guiding two warp threads or a guide device for carrying several track segment trios and/or more than two warp threads can also be provided here.

The combined circular orbits enable parallel operation of several shuttles with different directions and cycles of rotation and different thread, tape or fiber materials, which means that a large number of different weft threads and warp threads can be processed at the same time and an even greater variety of possible weaving patterns and fabric properties is created can be.

These and other features resulting from the patent claims, the description of the exemplary embodiments and the drawings can each be considered advantageous individually or in combination Embodiments of the invention may be realized for which protection is claimed here.

Fig. 1

eine Vorderansicht einer erfindungsgemäßen Rundwebmaschine zum Beweben eines konturierten, zweiteiligen Webkerns mit variablem Kernquerschnitt, mit einer schienengeführten kreisförmigen Umlaufbahn für zwei Schütze und mit 12 stationären Kettspulen-Einrichtungen und 12 Führungseinrichtungen,

Fig. 2a,b

Seitenansichten der Rundwebmaschine nach Fig. 1 (von rechts) in zwei Betriebsphasen des Bewebens des konturierten, zweiteiligen Webkerns mit variablem Kernquerschnitt,

Fig. 3

eine Vorderansicht einer zweiten Ausführung der erfindungsgemäßen Rundwebmaschine zum Beweben eines zylindrischen Webkerns, mit einer schienengeführten kreisförmigen Umlaufbahn für zwei Schütze und mit 12 stationären Kettspulen-Einrichtungen und 12 Führungseinrichtungen,

Fig. 4

eine halbseitige Seitenansicht der Rundwebmaschine nach Fig. 3,

Fig. 5

eine halbseitige Seitenansicht der Rundwebmaschine nach Fig. 3, jedoch mit 24 stationären Kettspulen-Einrichtungen und 12 Führungseinrichtungen,

Fig. 6

eine Vorderansicht einer dritten Ausführung der erfindungsgemäßen Rundwebmaschine zum Beweben eines zylindrischen Webkerns, mit einer schienengeführten kreisförmigen Umlaufbahn für zwei Schütze und mit 12 Kettspulen-Einrichtungen an 12 Führungseinrichtungen,

7a, b

Seitenansichten der Rundwebmaschine nach Fig. 6 in zwei Arbeitsphasen des Bewebens des zylindrischen Webkerns,

Fig. 8

halbseitige Seitenansicht der Rundwebmaschine nach Fig. 6, jedoch mit 24 Kettspulen-Einrichtungen an 12 Führungseinrichtungen,

Fig. 9

halbseitige Seitenansicht einer vierten Ausführung der erfindungsgemäßen Rundwebmaschine zum Beweben eines zylindrischen Webkerns, mit einer schienengeführten kreisförmigen Umlaufbahn für zwei Schütze und mit 12 Kettspulen-Einrichtungen zwischen jeweils einem ersten und zweiten Bahnsegment,

Fig. 10a, b

Seitenansichten einer fünften Ausführung der erfindungsgemäßen Rundwebmaschine, ähnlich der Rundwebmaschine nach Fig. 6, mit zwei schienengeführten kreisförmigen Umlaufbahnen für jeweils zwei Schütze und mit 24 Kettspulen-Einrichtungen an 12 Führungseinrichtungen in drei Arbeitsphasen des Bewebens eines zylindrischen Webkerns.

The circular loom according to the invention is explained in more detail below using several exemplary embodiments. The associated drawings show a schematic representation in

1

a front view of a circular loom according to the invention for weaving a contoured, two-part weaving core with a variable core cross-section, with a rail-guided circular orbit for two shuttles and with 12 stationary warp spool devices and 12 guide devices,

Fig. 2a,b

Side views of the circular loom 1 (from right) in two operational phases of moving the contoured, two-piece weaving core with variable core cross-section,

3

a front view of a second embodiment of the circular loom according to the invention for weaving a cylindrical weaving core, with a rail-guided circular orbit for two shuttles and with 12 stationary warp spool devices and 12 guide devices,

4

a half-page side view of the circular loom after 3 ,

figure 5

a half-page side view of the circular loom after 3 , but with 24 stationary warp bobbin devices and 12 guide devices,

6

a front view of a third embodiment of the circular loom according to the invention for weaving a cylindrical weaving core, with a rail-guided circular orbit for two shooters and with 12 warp spool devices on 12 guide devices,

7a, b

Side views of the circular loom 6 in two work phases of weaving the cylindrical weaving core,

8

half side view of the circular loom 6 , but with 24 warp bobbin devices on 12 guide devices,

9

Half-side side view of a fourth embodiment of the circular loom according to the invention for weaving a cylindrical weaving core, with a rail-guided circular orbit for two shuttles and with 12 warp spool devices between a first and second track segment,

10a, b

Side views of a fifth embodiment of the circular loom according to the invention, similar to the circular loom 6 , with two rail-guided circular orbits for two shuttles each and with 24 warp spool devices on 12 guide devices in three work phases of moving a cylindrical weaving core.

In the examples set forth below, reference is made to the accompanying drawings which form a part thereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced.

In the figures, elements that are identical, have the same effect, or are designed in a similar manner are provided with identical reference symbols, insofar as this is appropriate.

It is understood that other embodiments may be used and structural or logical changes may be made, without departing from the scope of the present invention.

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 is, therefore, not to be taken in a limiting sense.

The scope of the present invention is defined by the appended claims.

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 orbit 3 of the circular loom. The orbit 3 has a ring-shaped, segmented track body 4 made up of 12 track segments 5 designed in the shape of ring segments, which are arranged in a row next to one another very closely, with almost no gaps. Each track segment has three rail pairs of guide rails 7 running in the shape of ring segments, the pairs of rail segments (pairs of rails) 7 of the lined-up track segments 5 being arranged concentrically around the central weaving axis 2 of the circular loom and almost flush with one another, and are therefore formed circumferentially in the composite.

Two outer pairs of rails, each with two guide rails 7, are each arranged on the opposite, radially extending side walls of the web segments 5, and an inner pair of rails, each with two guide rails 7, is arranged on an axially extended inner wall of the web segments 5 that faces the weaving axis 2 (see also Fig. 2a, b ).

The radially outer delimitation of the track body 4 is formed by the axially extending outer walls of the track segments 5 facing away from the weaving axis 2 , while the radially extending side walls of the track segments 5 delimit the track body 4 axially.

The segmented rail body 4 with the segmented guide rails 7 (pairs of rail segments) together form the circular orbit 3, the outer boundary of the rail body 4 defining the outer contour of a track plane 8 of the circular orbit 3 in its radial and axial extent.

The circular loom also has 12 warp bobbin devices 9, each with 12 warp thread bobbins 10, which are arranged laterally fixed to a preferably hollow-cylindrical machine housing 6 of the circular loom (see also Fig. 2a, b ).

Corresponding to the number of existing warp bobbin devices 9 and the web segments 5 of the orbit, a total of 12 mobile guide devices 11 are arranged on the outer circumference of the track body 4 outside of the circular orbit 3 and concentrically around the central weaving axis 2 of the circular loom.

Each of the guide devices 11 has a base body 12 fastened to the machine housing 6 and a positioning part 13 which can be moved axially relative to the base body 12 and the machine housing 6 and is designed as a guide carriage 13 in the exemplary embodiment.

On each of the axially movable guide carriages is u. a. one of the 12 orbit segments 5 of the orbit 3 is arranged.

The guide carriage 13 comprises a thread guide element 14 for guiding and directing a warp thread 15, which in this exemplary embodiment is designed as a thread guide channel 14 (thread channel) directed axially in the direction of the weaving axis 2 and ends with a thread deflection in a thread outlet 16.

The weaving core 1a has a weaving core axis 17 which, according to the arrangement in this exemplary embodiment, runs congruently with the weaving axis 2 of the circular loom. As from the side view Fig. 2a, b clearly visible, the divisible weaving core 1a is designed with a variable core cross section and thus with a non-uniform circumference. It is mounted so that it can rotate about its weaving core axis 17 and can be moved along the weaving axis 2 of the circular loom.

From the figures 1 , 2a and b it can be seen that the warp threads 15 of the warp thread spools 10 provided by the warp spool devices 9, while maintaining a certain thread tension of a thread tensioner, not shown, of the warp spool device 9 for moving the weaving core 1a through an axially directed thread channel 14 of the axially movable guide carriage 13 of the guide device 11 are guided, the warp threads 15 running essentially perpendicularly to the web plane 8 through the thread channel 14 and being guided with the thread channel 14 . The warp threads 15 emerge at a thread outlet 16 of the guide carriage 13, from where they are guided linearly to a respective weaving point on the weaving core 1a.

Corresponding to the number of 12 track segments 5 of the revolving track 3, identically designed second track segments 18 are also arranged on the guide carriage 13, which have a matching guide rail 7 with three pairs of rail segments 7 each, all parallel to the track segments 5 of the revolving track 3 and whose rail segment pairs 7 and 7 are equally spaced axially.

The path segments 5 of the orbit 3 are referred to below as first path segments 5 and the path segments 18 arranged axially next to the first path segments 5 of the orbit 3 are referred to below as second path segments 18 .

A first track segment 5 of the orbit 3 and an associated, second track segment 18 are arranged in pairs on a guide carriage 13 and are carried along with it.

The thread outlet 16 of the guided warp thread 15 of the respective guide carriage 13 is arranged at an average distance between the pair of track segments 5 , 18 consisting of the first track segment 5 and the second track segment 18 .

Along the segmented guide rails 7 of the orbit 3, two shooters 19 are guided, each having a rifle 20 with a weft spool 21 each.

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 irregularly contoured weaving core 1a.

The shooters 19 revolve by means of the rifle carriages 20 along the guide rails 7, which form the guide for the revolving shooters 19 and thus define the circular running line of the shooters 19.

The axis of rotation of the weft thread bobbin 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.

The Schützenwagen 20 each have nine rubberized guide rollers 23, of which three guide rollers 23 are each associated with a pair of rails of the guide rails 7. In each case three guide rollers 23 are held and guided on both sides by the two outer pairs of rails of the guide rails 7 and three further rollers 23 are guided on both sides by the inner pair of rails of the guide rails 7 .

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

The shooters 19 can thus roll along the guide rails 7 of the orbit 3 independently of one another at the same or different speeds.

The guide rollers 23 are formed in such a large number and are arranged far apart from one another that the rifle car 20 always contacts at least two track segments 5 during its circulation and can thus bridge one or even several separation points of the segmented track body 4 at the same time, which ensures smooth and smooth running the Schützenwagen 20 provides.

In 1 , 2a, b the two circulating rifle carriages 20 of the shooters 19 are shown schematically in the 6 o'clock or 12 o'clock position along the orbit 3 .

For the sake of clarity are in the Figures 2a, b only the two warp bobbin devices 9 arranged in the 6 o'clock and 12 o'clock position of the circular loom and the associated guide devices 11 are shown, each with a pair of web segments 5, 18 consisting of the first and second web segment.

The guide carriages 13 arranged around the circumference of the orbit 3 are each mounted so as to be linearly displaceable relative to one another in the axial direction parallel to the weaving axis 3 .

To mount the guide carriage 13, two parallel, longitudinally extending guide grooves 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).

The guide grooves and guide webs are aligned axially 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 each be moved essentially perpendicularly to the path plane 8 of the revolving path 2 and parallel to the weaving axis 2.

When the guide carriage is moved, the pair of track segments 5, 18 made up of the first track segment and the second track segment is carried along and moved axially relative to the pair of track segments 5, 18 made up of the first and second track segments of the adjacent guide carriage 13, which are arranged adjacent to each other on the circumference of the orbit 3 .

To guide the pairs of track segments 5, 18, the respective adjacent track segments 5, 18 have sliding surfaces on their end faces facing one another in the circumferential direction, along which they slide (not shown) during their relative movement to one another.

The accuracy of the axial guidance of the path segments 5 or 18 is increased by corresponding guide grooves and guide webs (not shown) provided on the end faces facing one another.

The rapid, alternating movement of the guide carriages 13 is generated and controlled via individual switchable electric linear drives that act in two directions (not shown).

The control of the back and forth movement of the guide carriage 13 can be realized along a toothed rack or threaded rod (not shown).

In this exemplary embodiment, the warp thread spools 10 of the warp spool devices 9 are each arranged in a straight extension of the thread channel 14 of the guide carriage 13 on the machine housing 6 .

The feeding of the warp threads 15 from the warp thread bobbins 10 via the thread channel 14 of the guide carriage 13 further to the weaving point on the weaving core 1a is thus largely rectilinear with few deflections, with the thread tension of the warp threads 15 being able to be maintained at a high level.

In order to alternately change the path segments 5, 18 and the warp thread 15 of a guide device 11, these are each moved linearly back and forth in the axial direction by means of the movable guide carriage 13, with a first path segment 5 of the orbit being replaced by a second path segment 18 and vice versa and the warp thread 15 running out of the thread outlet 16 is moved on both sides of the path plane 8 of the orbit 3 (see Fig. 2a, b ).

During the exchange of the web segments 5, 18, the warp thread 15 passes through the defect in the orbit 3 that has temporarily formed due to the temporarily missing web segments 5 and 18 and can thus pass through the orbit plane 8 or through the temporarily open orbit 3 for the purpose of changing sides be transported in both directions without contact.

The warp threads 15 running to the weaving point assume a variable angle (weaving angle) with respect to the extent of the web plane 8 during alternating, axial movement to and fro. When passing the orbit 3, the weaving angle of the warp threads 15 is approximately 0°, in the changing position to allow passage of the shuttle 19, the maximum weaving angle of the warp threads 15 is reached (cf. Fig. 2a, b ).

Since during the necessary side change of the warp threads 15 apart from the warp threads 15 themselves there are no components of the guide device 11 or the revolving path 3 in the area of the revolving path 3 or within the path plane 8, the respective temporarily created defect in the interrupted revolving path 3 is considered a empty space (empty space) formed, through which the respective warp thread 15 can be carried out unhindered. Furthermore, the fact that there are no components of the guide device 11 between the web segments 5, 18 means that the shuttles 19 alone determine the outer axial limit for the axial positioning of the warp threads 15 as they pass through the shuttles 19, so that the warp threads 15 optimal small maximum weaving angle can form what during the change in position of the warp threads 15 there is a small change in the angle of the weaving angle of the warp threads 15 to the web plane 8 .

This angular limitation of the movement of the warp threads 15 for changing sides also ensures that the warp threads 15 maintain a high thread tension.

The rectilinear guidance of the guide carriages 13 of the guide device 11 perpendicular to the web plane 8 also enables very short distances for the movement of the warp threads 15 and, in conjunction with the aforementioned fast-acting linear drives of the guide carriages 13, consequently causes a particularly effective alternation of the warp threads 15 on both sides of the web plane 8.

the Figures 2a, b show two operating phases of the weaving process in the circular loom with changing positioning of the guide carriages 11 with the respective web segments 5, 18 and warp threads 15 during the circulation of the two shuttles 19 by 180°.

In the operating phase after Figure 2a the two revolving shuttles 19 are in the 6 o'clock and 12 o'clock position of the circular loom, with some guide carriages 13, including the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position, with the warp thread 15 and the second track segment 18 in the image plane to the right of the orbit 3 and further guide carriages 13, including the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position, with the warp thread 15 and the first track segment 5 in the image plane to the left of the orbit 3 are located, so that the space for the shuttle 19 to pass through at the 6 o'clock and 12 o'clock position is released by the warp threads 15 spread out from the track plane 8, forming a fold.

If the guide carriage 13 of the guide device 11 is positioned in the image plane to the right of the orbit 3

Orbit 3 is closed at the same time by the first orbit segment 5, while the second orbit segment 18 is located in the standby position to the right of the orbit 3. If the guide carriage 13 of the guide device 11 is positioned in the plane of the image to the left of the orbit 3, the orbit 3 is alternatively closed all the way round by the secondary track segment 18, while the first track segment 5 is in the standby position to the left of the orbit 3.

There can be any number of guide carriages 13, for example every second, third or all guide carriages 13 of the guide devices 11 during a rotation of the contactor 19 in the image plane to the right or left of the orbit 3.

Figure 2b shows the operating phase of the circular loom, in which the shuttle 19 previously located at the 6 o'clock position moves through the 12 o'clock position and vice versa, with some guide carriages 13, including the guide carriage 13 of the guide device arranged in the 12 o'clock position 11, with the warp thread 15 and the first track segment 5 are located in the image plane to the left of the orbit 3, and further guide carriages 13, including the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position, with the warp thread 15 and the second track segment 18 are in the image plane to the right of orbit 3 while shooters 19 pass through the 6 o'clock and 12 o'clock positions.

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

Depending on the position of the guide carriage 13 of the guide device 11 in the image plane to the right or left of the orbit 3, the orbit 3 is immediately through the first 5 or, alternatively, the second orbit segment 18 is closed all the way round as soon as the shooters 19 pass through the orbit 3 .

In addition, the contactors 19 can run around the guide rails 7 at symmetrical or asymmetrical distances from one another.

The warp threads 15 are alternately spread in opposite directions in the above-described or another alternating mode of the guide carriages 13, as a result of which the warp threads 15 are undulated with the weft threads 22 of the shuttle 19 circulating on the orbit 3 in a specific mode, in order to produce a hollow-profile-like fabric 25 with the desired weaving pattern, as in Fig. 2a, b shown.

The irregularly profiled weaving core 1a can be moved axially along the weaving axis 2 during the weaving process, with the fabric 25 being deposited in a fixed/stationary manner 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 forwards and backwards movement of the weaving core 1a to produce a plurality of fabric layers 25 is also possible.

During its axial movement, the weaving core 1a can also be made to rotate about its weaving core axis 17 or tilted to the weaving axis 2 in order to achieve a changed angular position of the warp threads 15 and weft threads 22 of e.g. +/- 60° to the weaving core axis 17 on the to generate web core 1a.

In the Fig. 2a, b The uniform weaving structure shown as a result of a uniform weaving mode can also be changed during the weaving process by means of the individual drive and control of both the shuttle carriage 20 and the guide carriage 13 and the weaving core 1a.

The rifle carriages 20 can be precisely positioned by means of the guide carriage 13 path segments 5, 18 with the run almost flush against one another very precisely and evenly and consequently at high running speed and at the same time apply a high thread tension to the weft thread 22 that is carried along.

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

After the loom core 1a has been woven, it can be removed sideways from the circular loom and the circular loom can be fitted with another loom core to be woven.

The mentioned advantages of the circular loom lead to a high process efficiency and also enable the weaving of the weaving core 1a with a very tightly tensioned fabric 25.

The circular loom is therefore particularly suitable for weaving large, non-uniformly contoured weaving cores with contour-conforming technical fabrics, e.g. for the production of woven, hollow-profiled fiber preforms for wheel rims.

the Figures 3 , 4 and 5 show a second embodiment of the circular loom according to the invention, here for weaving a cylindrical weaving core 1b.

The above description of the first embodiment of the circular loom also applies to the circular loom described here according to the second embodiment with regard to the matching features and their advantages, so that reference is made to the corresponding explanations in this regard.

To avoid repetition, only the differences compared to the first version of the circular loom are shown below 1 , 2a, b described.

In this embodiment, 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.

The after 3 and 4 The 12 warp coil devices 9 provided are arranged essentially centrally in the extension of the track plane 8 of the orbit 3 .

The after figure 5 The 24 warp coil devices 9 provided are arranged in pairs next to one another in the axial direction, with the reflected line of a pair of warp coil devices 9 being arranged essentially centrally in the extension of the web plane 8 .

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

The 24 warp spool devices 9 after figure 5 are assigned in pairs to a movable guide device 11, so that two warp threads 15 are guided per guide device 11.

For the sake of clarity are in the Figures 4 and 5 in each case only the warp bobbin devices 9 arranged in the 12 o'clock position of the circular loom and associated guide devices 11, each with a pair of track segments consisting of a first and second track segment, are shown and further described.

The base body 12 of the guide device 11, which is attached to the machine housing 6, has an axially extending passage 24 for the warp thread to pass through.

The guide carriage 13 of the guide device 11 after Figures 4 and 5 each has a thread guide element 14 with a radially directed thread channel 14 to which the thread outlet 16 is connected.

By the warp coil device 9 after 4 Warp threads 15 provided run individually through the axially extending passage 24 of the base body 12 and through the radially directed thread channel 14 of a guide carriage 13, whereas those of the warp coil device 9 after figure 5 provided warp threads 15 run in pairs through the axially extending passage 24 of the base body 12 and a radially directed thread channel 15 of each guide carriage 13.

During the alternating sideways movement of the guide carriage 13 to change the positions of the web segments 5, 18 and the warp threads 15, the radially directed thread channel 14 with the warp thread 15 is located behind 4 or the thread channel 14 with the two warp threads 15 after figure 5 alternately in a position to the right and left of orbit 3 or orbital plane 8.

During the sideways movement, momentary intermediate positions of the thread duct 14 result, such as a central position, in which the radially directed thread duct 14 is essentially in a straight line extension to the arrangement of the warp thread spool 10 of the warp spool device 9 fixed to the housing and thus temporarily a deflection-free travel path of the warp thread 15 allows through the thread channel 14.

With this special guidance of the warp thread 15 (according to 4 )/ of the warp threads 15 (after figure 5 ) 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 sideways movement of the guide carriage 14 are minimized, which further improves the preservation of the thread tension of the warp threads 15.

In the execution of the circular loom according to Figures 3 to 5 the weaving of a weaving core 1b with a uniform, cylindrical core cross section is provided as an example.

When moving the cylindrical weaving core 1b, it can be fixed stationary during the weaving process, with the fabric 25 being drawn off continuously in the axial direction along the weaving axis 2 of the circular loom or along the path core axis 17 of the weaving core 1b. The weaving core 1b is preferably aligned here in a congruent axial position with respect to the weaving axis 2.

In the views after Figures 4 and 5 Furthermore, for example, a weaving ring 26 fixed to the housing is arranged concentrically spaced around the weaving core 1b, which additionally homogenizes the supply of the warp threads 15 and weft threads 22 to the weaving point by dampening their thread oscillations and compensating for their thread tension fluctuations, which is particularly useful in circular looms with a larger diameter of the orbit 3 and thus with a greater distance between the weft thread bobbin 21 and the thread outlets 16 of the thread guide elements 14 of the guide devices 11 from the weaving core 1b.

the figures 6 , 7a, b show a third embodiment of the circular loom according to the invention for weaving a cylindrical weaving core 1b.

The above description of the second embodiment of the circular loom also applies to the circular loom described here according to the third embodiment with regard to the matching features and their advantages, so that reference is made to the corresponding explanations in this regard.

To avoid repetition, only the differences compared to the second embodiment of the circular loom are shown below Figures 3 to 5 described.

In this embodiment, the 12 warp bobbin devices 9 are each arranged on a guide carriage 13 of the 12 guide devices 11 and are carried along with this in the piggyback principle. The guide carriage 11 has a radially extending shaft for carrying the warp bobbin device 9 on which projects through the axially extending passage 24 of the base body 12 of the guide device 11 . The radially directed thread channel 14 is also formed in an elongate manner and is integrated in the elongate shank.

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 duct 14 and thus always enables the warp thread 15 to travel through the thread duct 14 without being deflected.

the Figures 7a, b show two operating phases of the weaving process in the circular loom with alternating positioning of the guide carriages 13 with the warp bobbin devices 9 during the circulation of the two shuttles 19 by 180° in each case.

In the operating phase after Figure 7a the two revolving shuttles 19 are in the 6 o'clock and 12 o'clock position of the circular loom, with formation of a warp thread fold, among other things, the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position with the warp bobbins device 9, the warp thread 15 and the second web segment 18 (in the ready position) in the image plane to the right of the orbit 3 and, among other things, the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position with the warp coil device 9, the warp thread 15 and the first orbit segment 5 (in the ready position) in the image plane to the left of the orbit 3 while the shooters 19 pass through the 6 o'clock and 12 o'clock positions.

Figure 7b shows the operating phase of the circular loom, in which the contactor 19, which was previously in the 6 o'clock position, passes through the 12 o'clock position and vice versa, with the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position now moving with the Warp coil device 9, the warp thread 15 and the first web segment 5 (in the ready position) in the image plane to the left of the orbit 3 is located and, among other things, the guide carriage 13 of the guide device 11 arranged in the 6 o’clock position with the warp bobbin device 9, the warp thread 15 and the second web segment 18 (in the ready position) is located in the image plane to the right of the orbit 3, while the Sagittarius 19 go through the 6 o'clock and 12 o'clock positions.

the 8 shows the circular loom Figures 6 to 7 , but with 24 warp coil devices 9, which are arranged here in pairs on the 12 guide devices 11, in particular on the respective guide carriage 13 with a radially extending shaft and are carried along with it.

In this way, two warp bobbin devices 9.1, 9.2 with two warp threads 15.1, 15.2 are guided through the radially directed thread channel 14 per guide device 11.

the figure 9 shows a fourth embodiment of the circular loom according to the invention for weaving a cylindrical weaving core 1b.

The design of the guide devices 11 is a further development of the design and arrangement of the guide devices 11 1 , 2a, b provided, so that in this respect the above description of the first embodiment of the circular loom with regard to the matching features and their advantages of the guide devices 11 also applies to the circular loom described here according to the fourth embodiment, so that in this regard reference is made to the corresponding explanations.

To avoid repetition, only the differences compared to the first version of the circular loom are shown below 1 , 2a, b described.

In this embodiment, the 12 warp bobbin devices 9 are each arranged in a spacing space between a pair of web segments 5 , 18 which is each arranged on a mobile guide carriage 13 of the 12 guide devices 11 . Each of the warp coil devices 9 is fastened on both sides to the facing side walls of the first and second web segment 5 , 18 and is thus carried along indirectly with the guide carriage 13 of the guide device 11 .

The provided warp thread 15 of the warp spool device 9 can be removed directly from the warp thread spool 10 and fed to the weaving point on the weaving core 1b, which is carried along by the axial movement of the guide carriage 13 for the required alternating side change of the warp thread 15.

In this respect, according to this embodiment, the guide carriage 13 advantageously does not require a thread duct or thread outlet for the guidance and outlet of the warp thread 15.

9 shows the operating phase of the circular loom, in which, among other things, the guide carriage 13 of the guide device 11 arranged in the 12 o’clock position with the warp bobbin device 9 and its warp thread 15 as well as with the first web segment 5 (in the ready position) are in the image plane to the left of the Orbit 3 is located while contactor 19 passes through the 12 o'clock position.

In the fourth embodiment of the circular loom 9 is different from the first version after the 1 , 2a , b the moving of a weaving core 1b with a uniform, cylindrical core cross-section according to the second embodiment of the Figures 3 to 5 provided, which is why reference is made to the corresponding description in this regard.

the Figures 10a,b show a fifth embodiment of the circular loom according to the invention for weaving a cylindrical weaving core 1b.

The above description of the third embodiment of the circular loom also applies to the circular loom described here with regard to the matching features and their advantages according to the fifth embodiment, so that reference is made to the corresponding statements in this regard.

To avoid repetition, only the differences compared to the third embodiment of the circular loom are shown below 6 , 7a, b described.

The circular loom according to this exemplary embodiment has two circular circulating paths 3.1, 3.2 arranged parallel to one another for the rail-guided circulation of two shuttles 19 each, with the second circular circulating path 3.2 and its path segments 18 being configured identically to the first circulating path 3.1 and its path segments 5.

The orbit segments 18 of the second orbit 3.2 relate to the orbit segments 18 that are subordinate to the first orbit segments 5 and can be assigned to the first orbit as an alternative.

According to the number of track segments 5 of the first orbit 3.1 and the number of track segments 18 of the second orbit 3.2, identically designed, third track segments 27 are arranged on the respective guide carriages 13, which have a matching guide rail 7 with three rail segment pairs 7 each, are all parallel to the track segments 18 of the second orbit 3.2 and their rail segment pairs 7 and equally spaced axially.

The track segments 18 of the second orbit 3.2 are referred to as second track segments 18 below, and the track segments 27 that are subordinate to the second track segments 18 of the second orbit 3.2 are referred to as third track segments 27 below.

In each case, a first path segment 5 of the first orbit 3.1, a second path segment 18 of the second orbit 3.2 and a sibling, third path segment 27 are together on one Arranged guide carriage 13 of the 12 guide devices 11 and are carried and positioned with this.

The circular loom also has 24 warp bobbin devices 9, each with 24 warp thread bobbins 10, which are arranged in pairs on an axially movable guide carriage 13 of the 12 guide devices 11, with the two warp bobbin devices 9.1, 9.2 each being mounted on a radially extending shaft of the guide carriage 13 are held and are carried along with the guide carriage 13.

To guide one warp thread 15 of the warp threads 15.1, 15.2 provided by the two entrained warp spool devices 9.1, 9.2, the guide carriage 13 comprises two radially extending thread channels 14.1, 14.2, which are each formed in a shaft and each end in a thread outlet 16.1, 16.2 , wherein the first thread duct 14.1 or thread outlet 16.1 is arranged at an average distance between the first and second web segment 5, 18 and the second thread duct 14.2 or thread outlet 16.2 is arranged at an average distance between the second and third web segment 18, 27.

In this embodiment, too, the warp spool devices 9.1, 9.2 are arranged such that their warp thread spools 10 are essentially in a straight extension to the radially directed thread ducts 14.1, 14.2, thus always enabling a deflection-free travel path of the warp thread 15 through the respective thread duct 14.

the Figures 10a,b show two operating phases of the weaving process in the circular loom with alternating positioning of the guide carriages 13 with the warp bobbin devices 9 during the rotation of the two shuttles 19 in the two orbits 3.1, 3.2 by 180° each.

In the operating phase after Figure 10a are the two rotating shooters 19 of the two orbits 3.1, 3.2 in the 6 o'clock and in the 12 o'clock position of the circular loom, with the formation of two warp thread folds, among other things, the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position is shifted to the left in the image plane in such a way that the first Warp coil device 9.1 with the first warp thread 15.1 and the first track segment 5 are positioned to the left of the first orbit 3.1, with the first track segment functioning in the standby position and the first orbit 3.1 being closed by the second track segment 18 as a substitute, and further the second warp coil device 9.2 with the second warp thread 15.2 is positioned between the first and second orbits 3.1, 3.2, with the second orbit 3.2 being alternatively closed by the third orbit segment 27, while the shuttles 19 of the two orbits 3.1, 3.2 cover the 6 o'clock and 12 -Go through clock position.

Forming two more warp thread folds are in the operating phase Figure 10a among other things, the guide carriage 13 of the guide device 11 arranged in the 6 o'clock position is shifted to the right in the image plane in such a way that the second warp bobbin device 9.2 with the second warp thread 15.2 and the third track segment 27 are positioned to the right of the second orbit 3.2, with the third track segment 27 functions in the ready position and the second orbit 3.2 is regularly closed by the second track segment 18, and furthermore the first warp coil device 9.1 with the first warp thread 15.1 is positioned between the first and second orbit 3.1, 3.2, with the first orbit 3.1 is regularly closed by the first track segment 5, while the contactors 19 of the two orbits 3.1, 3.2 pass through the 6 o'clock and 12 o'clock positions.

In the operating phase after Figure 10b the contactors 19 of the two orbits 3.1, 3.2, which were previously in the 6 o'clock position, pass through the 12 o'clock position and vice versa.

Among other things, the guide carriages 13 of the guide devices 11 arranged in the 6 o'clock and 12 o'clock positions are moved together to the right in the image plane, so that the respective second warp bobbin device 9.2 with the second warp thread 15.1 and the third web segment 27 on the right of the second orbit 3.2 are positioned, with the third track segment 27 functioning in the standby position and the second orbit 3.2 being regularly closed by the second track segment 18, and further the respective first warp coil device 9.1 with the first warp thread 15.1 between the first and second orbit 3.1, 3.2 is positioned, the first orbit 3.1 being regularly closed by the first orbit segment 5, while the contactors 19 of the two orbits 3.1, 3.2 pass through the 6 o'clock and 12 o'clock positions.

During the axial displacement of the guide carriage 13 in the image plane to the left or right, the warp thread 15.1 of the first warp coil device 9.1 crosses the first track plane 8.1 of the first orbit 3.1, while the warp thread 15.2 of the second warp coil device 9.2 crosses the second track plane 8.1 of the second Orbit 3.2 traverses.

In the embodiment of the circular weaving machine according to the fifth exemplary embodiment, an even larger number of possible weaving modes and weaving structures can be realized while maintaining a high weaving speed and weaving quality.

Reference List

1

Weaving core, non-uniform a, cylindrical b

2

Weaving axis of the circular loom

3

circular orbit, first .1, second .2

4

Road body first .1, second .2

5

Railway segment, first

6

machine housing

7

guide rail

8th

Track level, first .1, second .2

9

Warp coil device, first .1, second .2

10

warp spool

11

guide device

12

Basic body of the guide device

13

Positioning part, guide carriage

14

Thread guide element, thread guide channel, thread channel, first .1, second .2

15

Warp thread, first .1, second .2

16

Thread outlet, first .1, second .2

17

web core axis

18

Railway segment, second

19

contactor

20

rifle car

21

weft spool

22

weft thread

23

leadership role

24

passage of the body

25

tissue

26

web ring

27

Railway segment, third

Claims (12)

1. Circular loom for weaving a weaving core (1) along a weaving axis (2) with at least one shuttle (19), which has a weft thread spool (21) and is movable along a circular orbit path (3) around the weaving core (1), where the orbit path (3) is formed of first track segments (5) arranged one after the other along its circumference and at least one movably arranged or designed guide device (11) is provided, which guides at least one warp thread (15) provided from a warp thread spool (10) of a warp spool device (9) and on which at least one first track segment (5) of the orbit path (3) and at least one second track segment (18) that is alternatively assignable to the orbit path (3) are arranged and guided, where in the guided absence of the first and second track segment (5, 18) from the orbit path (3) the guided warp thread (15), crossing the track plane (8), passes through the orbit path (2).
2. Circular loom according to claim 1, characterised in that in each case a first track segment (5) of the orbit path (3) and a second track segment (18) are designed identically to each other.
3. Circular loom according to claim 1 or 2, characterised in that the movable guide device (11) has at least one movably or pivotably arranged or designed positioning part (13).
4. Circular loom according to one of claims 1 to 3, characterised in that a thread guide element (14) of the guide device (11) is designed as a thread guide channel (14), as a thread guide groove or as a thread guide eye.
5. Circular loom according to claim 3 or 4, characterised in that the positioning part (13) of the guide device (11) is designed to be linearly movable.
6. Circular loom according to one of claims 3 to 5, 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 or pivot path of the thread guide element (14).
7. Circular loom according to one of claims 1 to 6, 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).
8. Circular loom according to one of claims 1 to 7, characterised in that at least one warp spool device (9) is arranged on the guide device (11) and/or on a first (5) and/or second track segment (18).
9. Circular loom according to one of claims 1 to 8, 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.
10. Circular loom according to one of claims 1 to 9, characterised in that the guiding and/or the drive of the shuttle (19) is designed to be magnetic and/or electromagnetic.
11. Circular loom according to one of claims 1 to 10, 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 second circular orbit path (3.2) is formed of second track segments (18) arranged one after the other along its circumference, where the guide device (11) guides a second warp thread (15.2) provided from a second warp thread spool (10) of a second warp spool device (9.2) and on which at least one third track segment (27) alternatively assignable to the second orbit path (3.2) is arranged and guided, where in the guided absence of the second and third track segment (18, 27) from the second orbit path (3.2) the second guided warp thread (15.2), crossing the second track plane (8.2), passes through the second orbit path (3.2).
12. Circular loom according to claim 11, characterised in that in each case a second track segment (18) of the second orbit path (3.2) and a third track segment (27) are designed identically to each other.

Images