EP3770310A1 - Circular loom with trajectory - Google Patents

Abstract

The invention relates to a circular loom for weaving a weaving core with at least one contactor (19) which has a weft thread bobbin (21) and can be moved along a circular orbit (3) around the weaving core (1). It is proposed that at least one guide device ( 11), designed for guiding at least one warp thread (15) provided by a warp thread bobbin (10) of a warp bobbin device (9), which is movably arranged or outside a path plane (8) enclosed by the outer circumference of the circular orbit (3) is formed, wherein the guided warp thread (15), traversing the path plane (8), passes a recess (18) of the circular orbit (3).

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 along a circular orbit around the weaving core.

The known circular looms and weaving processes on circular looms are used for the production of hollow profile-like, hose-like textile fabrics for, for example, fire hoses, water hoses, sacks or wheel rims, etc.

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

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

Circular looms of this type are also equipped with warp bobbin devices. Warp bobbin devices essentially have, in addition to a warp thread bobbin with warp thread, a holder for the warp thread bobbin (warp bobbin holder) and a thread tensioning device.

The warp bobbin 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, the travel path of the warp bobbin devices taking place through the weaving plane in order to form what is known as piling of the warp threads through their changing positioning and to produce a weaving with the weft thread. A separate thread guide or thread deflection of the warp threads is largely dispensed with.

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

However, it turns out that the movability of the warp bobbin devices through the weaving plane is structurally very complex, 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 loom.

In addition, the transfer of the warp bobbin devices requires increased mechanical and control engineering effort. In addition to the necessary control of an acceleration and deceleration process of the very 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 the passage of weft thread bobbins mean a high structural effort, with the transfer - and Extension times limit the maximum possible speed of the weft thread bobbin.

For the circular loom according to the pamphlet FR 2339009 A1 the warp bobbin devices are pivotably mounted on a peripheral housing, the warp threads being fed alternately to the weaving core or the weaving plane by means of thread guide tubes that are connected to the swiveling warp bobbin devices, in that the thread guide tubes change the direction of the track for the rotation of the shuttle cross. For this purpose, the track is perforated, in particular provided with wide slots for the passage of the thread guide tubes, the thread guide tubes assuming their changing positions along the slots.

This circular loom also requires a complex mechanical and control engineering design of the movement of the warp bobbin devices, the speed of the shooters being limited by the passage 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 considerable thread wear. 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 looms for the production of fiber preforms for fiber composite products.

When the thread guide tubes are pivoted in the manner of an arc of a circle, the thread tension of the warp thread decreases significantly near the weaving point, which, in addition to a very loose fabric, can lead to an unclean weave pattern with tangles.

For the passage of the thread guide tubes through the track, relatively large slots or joints must be provided, so that these path interruptions lead to a very bumpy passage of the shooters over the slots and consequently to a very bumpy passage lead inhomogeneous rotation of the shooters, which in turn leads to undesirable vibrations in the circular loom and to further yarn tension fluctuations.

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

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

The object is achieved according to the invention by a circular loom with the features of claim 1, according to which at least one guide device, designed for guiding at least one warp thread provided by a warp thread bobbin of a warp bobbin device, is provided, which is movable outside a path plane enclosed by the outer circumference of the circular orbit is arranged or formed, wherein the guided warp thread, crossing the path plane, passes a recess in the circular orbit.

One or more shuttle (s) move with their weft thread bobbins along a, for example mechanically or electromagnetically formed circular orbit, which determines the conveying or guide line for the concentric conveying or guiding of the shuttle around the weaving core.

The contactor (s) can be active, e.g. B. preferably by means of its own, electrically operated direct drive, move along the orbit, or the contactor (s) can passively, z. B. by means of an externally driven, rotatable mechanical driver or by means of an electromagnetic one Propulsion, transported and controlled along the orbit.

The circular orbit is preferably aligned radially (perpendicular to the weaving axis) with respect to the axially directed loom axis of the circular loom, so that the circular loom has a particularly narrow design.

For certain applications 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 delimitation of the plane of the path of the circular loom within which the shuttle (s) with the weft thread rotate. The axially outer width of the circular orbit forms the axial delimitation of the path plane of the circular loom within which the shuttle (s) with the weft thread rotate. The outer boundary points of the circular orbit describe the orbit plane essentially as a circular disk.

The warp bobbin devices with the warp thread bobbins are preferably located in close proximity to the plane of the web in order to be able to feed the warp threads to the weaving core on the shortest possible paths.

The warp bobbin devices can be arranged in a stationary manner, e.g. fixedly on a housing part of the circular loom, or can also be arranged in different positions in relation to the housing of the circular loom.

The guide device (thread guide device) according to the invention takes over the guiding and changing positioning of the warp thread (s) (warp thread guide) between its provision by the warp bobbin device (s) and its / their interweaving with the weft thread at a weaving point on the weaving core. The management institution acts in this separate from the design and function of the warp bobbin device (s).

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

The guide device is movably arranged outside of the track plane or is designed to be movable in a fixed arrangement, the movable guide device acting completely outside the track plane and only the guided warp thread crosses the track plane and thereby passes the associated recess of the circular orbit.

With this stipulation, 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.

A plurality of guide devices are preferably arranged around the circumference of the circular orbit.

There can be a guide device for guiding a warp thread of a warp bobbin device or a guide device for guiding several warp threads of a group of warp bobbin devices or a single guide device for guiding all warp threads of the warp bobbin devices involved in the circular loom.

If a group of warp bobbin devices is provided which is assigned to 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 of the thread guidance of the warp threads towards the guide device.

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

By means of the movable guide device (s), the warp threads drawn off the warp thread bobbins can - without having to move the warp bobbin devices - be brought in short distances, quickly and with little effort on both sides of the orbit and thus the plane of the path, with a warp thread guided by the guide device subsequently crosses the plane of the path in which the warp thread leaving the guide device, for example via a thread outlet, passes a recess of the circular orbit that is assigned to the path of the thread outlet.

The circular orbit thus has a number of perforations or interruptions generated in accordance with the number of recesses provided.

A guide device or a thread outlet of the guide device is preferably assigned spatially and functionally to one or more recesses of the circular orbit. In this way, individual warp threads can each pass through a recess or several warp threads together can pass through a recess in the orbit with little or at best without thread deflection. In this way, the warp threads can be guided and passed through the recess of the orbit in a particularly low-wear, thread-protecting manner.

The recesses of the circulating path are preferably so narrow that only the warp thread or threads can just traverse the circulating path without contacting the circulating path, in order to avoid frictional wear of the warp threads.

Preferably, the recesses of the circulating path for passing the warp threads are in accordance with the guide device (s) or the thread outlet of the guide device (s) described alternating path of the warp threads arranged and extending formed. The passage of the warp thread in the recess of the orbit can thus take place without deflection.

Specifically, the recesses of the orbit can be designed, for example, as an elongated slot that breaks through the orbit in a locally limited manner (opening) or, for example, as a continuous joint that separates the orbit at the point (interruption).

While the warp threads are moved by 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.

In this way, the warp threads can be spread and fanned alternately in opposite directions on both sides of the web plane, in order to form a warp thread piling while maintaining a high thread tension, whereby in the change positions of the warp threads outside the web plane, the passage of the shooter (s) is ensured along the orbit, after which an undulation / interweaving of the warp threads with the weft thread running through the warp thread piling, which is drawn from the weft thread bobbin of the shuttle carried along the orbit, takes place on the weaving core.

According to the sequence and the operating cycles in which the warp threads alternately change their position by means of the guide device (s) and the shuttle passes through the orbit, the most varied of weaving patterns can be formed on the weaving core to be woven.

Since, according to the invention, only the warp threads themselves are guided through the plane of the web by the movable guide device (s) On the one hand, the geometric structure of the guide device (s) for the necessary alternating positioning of the warp threads and the orbit can be designed in a structurally simplified manner and, on the other hand, the change positions of the warp threads can be designed very close to the lateral, axial delimitation of the track plane, so that the passage of the Sagittarius is just guaranteed to be free of contact with the warp thread, after which the warp thread positions can be changed and the shooters can rotate more quickly.

With the design of the circular loom according to the invention, the weaving process can consequently be accelerated and a higher productivity can be achieved with a structurally and spatially reduced transport effort for changing and panning the warp threads.

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 due to the narrow change of position to the advantage of high weaving quality .

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

As a result, at a very high operating speed 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.

The fact that, by means of the guide device (s) according to the invention, only the warp threads are moved in narrow recesses in the orbit, results in comparison with the known Execution of the circular loom with thread guide tubes pivoting into the plane of the web has the further advantage that the shuttle can circulate in the orbit with less vibration and thus faster while maintaining a high thread tension, both for the warp threads and the weft thread, and the aforementioned increase in productivity and quality continues improved.

As a result of the feasibility of a stable high thread tension of the weft threads and the warp threads, the circular loom according to the invention is particularly suitable for weaving looms with a cross-sectional geometry that changes in the axial extent (in the direction of the axis of rotation of the loom (loom axis)), since the tightly interwoven threads conform to a true contour can create changing web core contour.

To move a weaving core contoured in this way with a stationary fabric, the weaving core is moved along the weaving axis of the circular loom in order to be able to weave the entire contour of the weaving core. The weaving point at which the warp threads are interwoven with the weft threads on the surface of the weaving core not only migrates around the circumference of the rotating weaving core but also along its core axis.

The axis of rotation of the weaving core (weaving core axis) is preferably congruent with the weaving axis of the circular loom, 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 loom.

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

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 example, for the production of woven preforms for wheel rims from fiber composite material.

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

According to an advantageous embodiment, the movable guide device has at least one displaceably or pivotably arranged or designed positioning part.

The positioning part can be moved or pivoted alternately by means of a corresponding structural design of the guide device 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.

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 guide 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 a positioning part of the guide device which directly carries a warp thread bobbin, it being possible for a thread guide element to be unnecessary.

The guide device can also have several positioning parts, possibly with one or more thread guide elements for guiding and steering one or more warp threads.

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 passed.

The thread guide element can end with a thread outlet of the warp thread. An outlet opening at the exit of the guided warp thread from the thread guide element of the positioning part is referred to as the thread outlet.

The thread guide element for moving or pivoting the warp thread can preferably be arranged and designed on or in a positioning part of the guide device that is mounted so as to be movable or pivotable.

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

The positioning part can also be, for example, a movable or pivotable roller on which a thread guide groove (thread guide groove) is formed as a thread guide element in which the warp thread runs in a guided manner.

The movement or pivoting of the positioning part and subsequently the guided warp thread is preferably carried out with or without thread guide elements parallel to the weaving axis or with a rotation axis perpendicular to the weaving axis of the circular loom.

This results in the thread guide path of the warp threads essentially perpendicular to the plane of the orbit of the orbit.

If the recesses of the orbit are designed according to the path of the warp threads during their alternating movement, ie also extending parallel to the weaving axis of the circular loom, the path and travel time of the warp threads to cross the plane can be shortened, so that the changing speed of the warp threads and thus the The speed of rotation of the contactors can be increased.

According to a further advantageous embodiment, the positioning part is designed to be linearly displaceable, so that the guided warp thread is also linearly displaceable in the following.

A linear displaceability of the positioning part can be made relatively simple in terms of construction and control technology.

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

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

These drives can achieve strong acceleration, deceleration and rapid operating switching and thus cause the positioning part to change direction quickly.

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

If the warp thread carried along with the positioning part is subsequently also moved linearly, the associated linear guidance of the warp thread also causes lower thread tension losses than with non-linear movements of the warp threads, which further improves the quality of the woven product.

The linear displaceability of the positioning part or the guided warp thread is preferably formed in the axial direction along the weaving axis of the circular loom.

In addition to the space savings resulting from this, the travel path of the positioning part and thus the path of the warp threads result exactly perpendicular to the plane of the orbit of the orbit.

In this way, the path and the travel time of the warp threads to cross the web level can be shortened with the least possible deflections in a straight line, so that the changing speed of the warp threads and thus the speed of rotation of the shooters can be further increased.

The positioning part of the guide device can be mounted such that it can be moved or pivoted, for example, by means of corresponding bearing elements.

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

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.

The base body can be connected in a stationary manner to the machine housing or the orbit or can be arranged movably on it.

One or more positioning parts can be assigned to a base body, which positioning parts can be moved or pivoted relative to this base body.

The bearing element (s) for the mobile mounting of a positioning part, such as a guide carriage, can, for example, be one or more elongated guide groove (s) of the base body or the component of the machine housing or of the guide carriage, which extend in the direction of the intended axis of movement of the Thread guide element are arranged and correspond to corresponding guide pins or guide web (s) of the guide carriage or the base body or the component of the machine housing.

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

The bearing elements can also be one or more guide rails corresponding to rollers or bearing bushes.

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

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

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

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

If a base body is provided, which is arranged in the radial direction between the positioning part and the circular orbit, it is preferably designed and arranged in relation to the warp thread carried along with the positioning part that a contactless 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 slot-like passage opening in association with the thread guide or the path of the thread outlet, so that the warp thread can pass through the passage opening, preferably without contacting it.

If, according to a further advantageous embodiment, the warp bobbin is arranged at least one warp bobbin device essentially in a straight and thus deflection-free extension of the path of the warp thread 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, can the implementation of an advantageous reduction in the total required thread deflections and a reduction in frictional wear in the course of the warp thread between the warp thread bobbin of the warp bobbin device and its Guide passage of the thread guide elements 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.

According to a further advantageous embodiment, the warp thread bobbin of at least one warp bobbin device is arranged essentially as an extension of the radial extension of the circular orbit. Thus, in particular the warp thread bobbin (s) of the warp bobbin device (s) is / are not only arranged outside the circumference of the circular orbit, but essentially in a radial extension of the orbit or the plane of the path.

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.

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

In this arrangement the warp threads can run with very few deflections from the warp thread bobbin via the guide device (s) to the weaving point.

The thread deflections of the warp threads to be carried out 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 smaller 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 movable guide device.

In this case, the warp bobbin device (s) is / are carried along with the warp thread bobbin by means of the guide device, preferably by the movable positioning part.

The warp bobbin device can preferably be carried by the movable guide device - using the piggyback principle.

For example, the warp bobbin device (s) can be arranged and carried along on the positioning part (s) of the guide device (s), wherein one or more warp bobbin devices can be provided on a positioning part.

In the embodiment of the invention, the circular loom can be made more compact and, for the benefit of further improved thread tension and thread protection, 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, especially because of the direct assignment of the warp bobbins. Device for guiding device the thread tension can be kept explicitly stable for the individual warp thread.

If two or more warp bobbin devices are arranged on a movable guide device, these warp bobbin devices with their warp bobbins are moved together with the guide device.

When several warp bobbin devices are carried along, several warp threads of the warp bobbin devices can be guided jointly or individually through preferably a thread guide element of the guide device and further pass a recess in the orbit together or individually.

These combinations enable the common guidance and interweaving of several, also different types of warp threads, in particular while ensuring an essentially constant 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.

In this case, the contactor (s) can run around by means of rolling or sliding means in or on at least one preferably annular guide rail which defines the circular orbit.

The guide rail is designed according to the design of the recesses at which the warp thread or the warp threads alternately pass the track plane before or after the passage of the gate and thus cross the passage of the gate, for example locally perforated by slots or completely interrupted by continuous joints. For example, in the case of rail interruptions formed by joints, the guide rail is divided into rail segments.

The contactor (s) move, roll, and slide over these perforation or interruption points in the ring-shaped guide rail.

The perforation or interruption points of the ring-shaped guide rail are preferably so narrow that only the warp thread or threads can just cross the guide rail without the guide rail to contact in order to avoid fretting of the warp threads. Accordingly, the very narrow perforation or interruption points of the ring-shaped guide rail have hardly any influence on the passage and thus on the smoothness of the contactors.

To increase the running accuracy, the contactor or contactors can also revolve around a plurality of guide rails arranged at a distance from one another by means of the rolling or sliding means.

The change positions of the warp threads can preferably be designed so close to the axial delimitation of the ring-shaped guide rail that the contactor can just pass through without contact.

The guide rail is preferably designed as an internal runner rail in which the contactor (s) rotate within the circular orbit that radially delimits the plane of the path.

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) provide a track that enables the shuttle to rotate with little vibration while the thread tension of the weft threads is consistently high, so that a largely homogeneous weaving operation can be achieved with high circulation speed at the same time.

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

According to a further advantageous embodiment of the invention, the guide and / or the drive of the contactor is on or formed magnetically and / or electromagnetically in the circular orbit, for example similar to a known Transrapid driving system. 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, sliding or non-contact manner along the electro-magnetic field and thus along the circular orbit .

In this way, in particular, the frictional resistance in the rotation of the contactors along the circular orbit and over the interruption points can be further reduced.

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, the guided warp thread crossing the path plane of the first and / or second orbit, the recess of the first and / or second circular orbit happens.

The guided warp threads can be moved by the guide device assigned to the two circulating paths alternately and according to any sequence pattern, crossing one or both path planes.

The combined circular orbits enable parallel operation of several shooters with different directions of circulation and circulation cycles and different thread, tape or fiber materials, whereby 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.

The second circular orbit can preferably be arranged at a distance from the first circular orbit in parallel.

These and further features emerging from the patent claims, the description of the exemplary embodiments and the drawings can each be implemented individually or in combination as advantageous embodiments of the invention, 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,

Fig. 7a,b

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

Fig. 8a,b,c

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

Fig. 9a,b,c

halbseitige Seitenansichten einer fünften Ausführung der erfindungsgemäßen Rundwebmaschine, ähnlich der Rundwebmaschine nach Fig. 8, mit zwei schienengeführten kreisförmigen Umlaufbahnen für jeweils zwei Schütze und mit 24 Kettspulen-Einrichtungen an 12 Führungseinrichtungen mit jeweils zwei Führungsschlitten in drei Arbeitsphasen des Bewebens eines zylindrischen Webkerns

Fig. 10a, b

Seitenansichten einer sechsten Ausführung der erfindungsgemäßen Rundwebmaschine zum Beweben eines konturierten, zweiteiligen Webkerns, mit einer schienengeführten kreisförmigen Umlaufbahn für zwei Schütze und mit 12 stationären Kettspulen-Einrichtungen und 12 alternativen Führungseinrichtungen in zwei Arbeitsphasen.

The circular loom 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 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 shooters and with 12 stationary warp bobbin devices and 12 guide devices,

Fig. 2a, b

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

Fig. 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 shooters and with 12 stationary warp bobbin devices and 12 guide devices,

Fig. 4

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

Fig. 5

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

Fig. 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 bobbin devices on 12 guide devices,

Figures 7a, b

Side views of the circular loom Fig. 6 in two working phases of moving the cylindrical core,

Figures 8a, b, c

half-sided side views of a fourth embodiment of the circular loom according to the invention, similar to the circular loom according to FIG Fig. 6 , with two rail-guided circular orbits for two shuttle gates each and with 12 warp bobbin devices on 12 guide devices in three working phases of moving a cylindrical loom,

Figures 9a, b, c

half-side side views of a fifth embodiment of the circular loom according to the invention, similar to the circular loom according to FIG Fig. 8 , with two rail-guided circular orbits for two shuttle gates each and with 24 warp bobbin devices on 12 guide devices each with two guide carriages in three working phases of moving a cylindrical loom

Figures 10a, b

Side views of a sixth embodiment of the circular loom according to the invention for weaving a contoured, two-part weaving core, with a Rail-guided circular orbit for two shooters and with 12 stationary warp spool devices and 12 alternative guide devices in two work phases.

In the examples set forth below, reference is made to the accompanying drawings, which form a part of the examples, and in which there 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 have a similar design are provided with identical reference symbols, insofar as this is appropriate.

It goes without saying that other embodiments can be used and structural or logical changes can be made without departing from the scope of protection of the present invention.

It goes without saying 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 interpreted in a restrictive sense.

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

Fig. 1 shows a circular loom in which a loom 1 a is arranged centrically to a weaving axis 2 of the circular loom and is surrounded by a circular orbit 3 of the circular loom. The circulating track 3 has an annular track body 4 made of 12 track segments 5 lined up next to one another, shaped like a ring segment, which are fixed to the housing on a, preferably hollow-cylindrical, machine housing 6 of the circular loom. The track body 4, explicitly the track segments 5, each have three pairs of rails in the shape of a ring segment extending guide rails 7, wherein the rail segment pairs (rail pairs) of the lined up track segments 5 are arranged and formed concentrically around the central weaving axis 2 of the circular loom.

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

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

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

The circular loom also has 12 warp bobbin devices 9, each with 12 warp thread bobbins 10, which are arranged laterally fixed to the housing on the machine housing 6 of the circular loom.

Corresponding to the number of warp bobbin devices 9 present, a total of 12 movable, drivable guide devices 11 are arranged on the outer circumference of the track body 4 outside 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 track body 4 and / or to the machine housing 6 and an axially relative to the base body 12 and to the machine housing 6 movable positioning part 13, which is designed as a guide carriage 13 in the exemplary embodiment.

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

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

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

From the Figures 1 , 2a and b it can be seen that the warp threads 15 of the 12 warp thread bobbins 10 for moving the weaving core la while maintaining a certain thread tension of a thread tensioner (not shown) of the warp bobbin device 9 via a thread channel 14 and a thread outlet 16 of the mobile guide carriage 13 of the guide device 11 each to a weaving point are performed on the web core la.

Corresponding to the number of guided warp threads 15, the circumferential path 3, respectively the web body 4 and the guide rails 7, have recesses 18 in the form of continuous narrow joints 18 directed perpendicular to the weaving axis 2, which the web body 4 with the guide rails 7 into the 12 web segments 5 share.

Two shooters 19 are guided along the guide rails 7, each of which has a shuttle carriage 20, each with a weft thread bobbin 21.

The weft thread 22 of the weft thread bobbin 21 is guided linearly to the current weaving point on the weaving core la in order to move the non-uniformly contoured core la while maintaining a certain thread tension.

The shooters 19 run by means of the gun carriage 20 along the guide rails 7, which form the guide for the rotating 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 gate 19, so that the feeding of the weft threads 22 to the weaving core 1 a largely manages with few or without deflections.

The rifle cars 20 each have nine rubberized guide rollers 23, of which three guide rollers 23 each are assigned to a pair of rails 7 of the guide rails. 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 gun carriage 20, whereby the power supply can be provided, for example, via several sliding contacts or energy storage devices carried along, and the control commands can be transmitted, for example, via radio control signals (not shown).

The contactors 19 can therefore roll independently of one another at the same or different speeds along the guide rails 7 of the circulating track 3.

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 as it rotates and can thus bridge one or even more joints 18 of the track body 4 at the same time, which ensures smooth and smooth running the rifle car 20 provides.

In Fig. 1 , 2a, b the two revolving rifle cars 20 of the riflemen 19 are shown schematically in the 6 o'clock and 12 o'clock position along the orbit 3.

For the sake of clarity, the Figures 2a, b only two warp bobbin devices 9 and the associated guide devices 11, namely the warp bobbin devices 9 and guide devices 11 arranged in the 6 o'clock and 12 o'clock position of the circular loom.

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 - running through an axially extending passage 24 of the base body 12 without contact - is linear to the weaving point on the Webkern la is performed.

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

The guide carriages 13 arranged around the circumference of the circulating track 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 support the guide carriage 13, two parallel, elongated guide grooves are provided on the base body 12 in which the guide carriage 13 is slidably supported 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 with respect to the circular loom and its circulating path 3, so that the guide carriages 13 with the thread channel 14 and the warp threads 15 carried along are each essentially perpendicular to the path plane 8 of the circulating path 2 and parallel to the weaving axis 2 can be moved.

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

The to-and-fro movement of the guide carriage 13 can be controlled, for example, along a rack or threaded rod (not shown).

In this exemplary 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.

The supply 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 la is thus largely straight with a few deflections, whereby the thread tension of the warp threads 15 can be maintained at a high level.

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

Through these narrow joints 18, only the warp threads 15 pass the orbit 3 in both directions without contact for the purpose of changing sides

The warp threads 15 running to the weaving point assume a variable angle (weaving angle) with respect to the extent of the path plane 8 when they are alternately guided axially back and forth. 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 passage of the gate 19, the maximum weaving angle of the warp threads 15 is reached (cf. Fig. 2a, b ).

Since during the necessary change of sides of the warp threads 15, apart from the warp threads 15 themselves, no geometric elements act in the area of the orbit 3 or within the path plane 8, only the gates 19 form the outer limit for the positioning of the warp threads 15 when they pass through the gates 19, see above that the warp threads 15 can form an optimally small maximum weaving angle, which results in a slight change in the angle of the weaving angle of the warp threads 15 to the plane of the web 8 during the change in position of the warp threads 15.

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

The rectilinear guidance of the guide carriages 13 of the guide device 11 perpendicular to the path 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 causes the warp threads 15 to alternate particularly effectively on both sides of the path plane 8.

The Figures 2a, b show two operating phases of the weaving process in the circular loom with alternating positioning of the guide carriages 11 with the warp threads 15 during the revolution of the two shooters 19 by 180 °.

In the operational phase after Fig. 2a the two rotating gates 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 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 in the image plane to the left of the orbit 3, so that the space for the passage the shooter 19 is released at the 6 o'clock and 12 o'clock position by the warp threads 15 spread apart from the plane of the web 8, forming a ply.

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 to the right or left of the orbit 3 in the image plane during one revolution of the contactor 19.

Figure 2b shows the operating phase of the circular loom in which the contactor 19, which was previously 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 6 o'clock and 12 o'clock Clock-position arranged guide devices 11, with the warp thread 15 in the plane of the drawing to the right of the orbit 3, while the 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 be located in the image plane to the right or left of the orbit 3.

In addition, the contactors 19 can rotate 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, which results in an undulation of the warp threads 15 with the weft threads 22, the shooters 19 rotating on the orbit 3 in a certain mode, to produce a hollow profile-like fabric 25 is done with the desired weave pattern, as in Fig. 2a, b shown.

The non-uniformly profiled weaving core la can be moved axially along the weaving axis 2 during the weaving process, the fabric 25 being placed in a stationary / stationary manner on the weaving core la. The axial movement of the weaving core la can take place, for example, quasi-stationary, discontinuously or continuously, depending on the desired weaving result. A forward and backward movement of the weaving core 1 a to produce a plurality of fabric layers 25 is also possible.

During its axial movement, the weaving core la can also be set in rotation about its weaving core axis 17 or inclined to the weaving axis 2 in order to change the angular position of the warp threads 15 and the weft threads 22 of e.g. +/- 60 ° to the weaving core axis 17 on the To generate web core la.

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 the control of both the shuttle carriage 20 and the guide carriages 13 and the weaving core 1a.

The gun carriage 20 can circulate very precisely and uniformly by means of the guide rails 7 and at the same time apply a high thread tension to the weft thread 22 that is carried along.

The narrow joints 18 in the orbit 3 for the passage of the warp threads 15 can be made by means of the large number of widely spaced, Rubberized guide rollers are easily rolled over and largely without affecting the gun carriage 20, so that the uniform rotation of the gunner 19 is not impaired.

The rapid, alternating spreading of the warp threads 15 by means of the guide carriages 13 which can be operated over short distances also enables the running speed of the gates 19 rotating on the guide rails 7 to be increased.

After the loom la has been moved, it can be removed sideways from the circular loom and the circular loom can be equipped with another loom 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 la with a very tightly tensioned fabric 25.

The circular loom is therefore particularly suitable for weaving large, irregularly 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 lb.

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 described below Fig. 1 , 2a, b described.

In this embodiment, the warp bobbin devices 9 are fixed to the housing essentially as an extension of the radial extension of the circular orbit 3 on an outer wall of the machine housing 6 of the circular loom.

The after Fig. 3 and 4th The 12 warp bobbin devices 9 provided are arranged essentially centrally in the extension of the path plane 8 of the circulating path 3.

The after Fig. 5 The 24 warp bobbin devices 9 provided are arranged in pairs next to one another in the axial direction, the mirror line of a pair of the warp bobbin devices 9 being arranged essentially centrally in the extension of the path plane 8.

The 12 warp bobbin devices 9 according to Fig. 3 and 4th are each assigned to a movable, displaceable guide device 11, so that one warp thread 15 is guided per guide device 11.

The 24 warp bobbin devices 9 according to Fig. 5 are each assigned in pairs to a movable, displaceable guide device 11, so that two warp threads 15 are guided per guide device 11.

For the sake of clarity, the Figures 4 and 5 only the warp bobbin devices 9 and associated guide devices 11 shown in the 12 o'clock position of the circular loom and described further.

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. The of the warp bobbin device 9 after Fig. 4 The warp threads 15 provided each run individually through a radially directed thread channel 14 of a guide carriage 13 and that of the warp bobbin device 9 Fig. 5 provided warp threads 15 run in pairs through a radially directed thread channel 15 of a guide carriage 13.

During the alternating sideways 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 path plane 8.

During the sideways movement, there are instantaneous intermediate positions of the thread channel 14, such as 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 bobbin 10 of the warp bobbin device 9 and thus temporarily a deflection-free path of the warp thread 15 through the thread channel 14 made possible.

With this special guidance of the warp thread / warp threads 15, the necessary thread deflections and absolute thread lengths of the warp threads 15 are reduced and, in particular, the different, relative thread lengths resulting from the sideways movement of the guide carriages 14 are minimized, which further improves the maintenance of the thread tension of the warp threads 15.

When running the circular loom according to Figs. 3 to 5 the movement of a weaving core lb with a uniform, cylindrical core cross-section is provided as an example.

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

In the execution according to Fig. 5 Furthermore, a housing-fixed loom 26 is arranged concentrically spaced around the loom lb, which additionally homogenizes the feed of the warp threads 15 and weft threads 22 to the weaving point by dampening their thread oscillations and compensating their thread tension fluctuations, which is particularly evident 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 has an advantageous effect.

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

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

To avoid repetition, only the differences compared to the second version of the circular loom are shown below Figs. 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 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 of the radially directed thread channel 14 and thus always enables a deflection-free path of the warp thread 15 through the thread channel 14.

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 rotation of the two contactors 19 by 180 ° each.

In the operational phase after Figure 7a The two rotating gates 19 are in the 6 o'clock and 12 o'clock position of the circular loom, with the guide carriage 13 of the guide device 11 arranged in the 12 o'clock position with the warp bobbins, among other things, forming a warp thread piling Device 9 and the warp thread 15 in the plane of the drawing to the right of the orbit 3 and, among other things, the guide carriage 13 of the guide device 11, which is arranged in the 6 o'clock position, with the warp bobbin device 9 and the warp thread 15 in the plane of the drawing to the left of the orbit 3 while the shooters 19 cycle 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 at the 6 o'clock position, passes through the 12 o'clock position and vice versa, with the guide carriages 13 now in the 6 o'clock and 12 o'clock positions arranged guide devices 11 with the warp bobbin device 9 and the warp thread 15 are located in the plane of the drawing to the right of the orbit 3, while the shooters 19 pass through the 6 o'clock and 12 o'clock positions.

The Figures 8a, b, c show a fourth embodiment of the circular loom according to the invention for weaving a cylindrical weaving core lb.

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

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

The circular loom according to this exemplary embodiment has two circular circulating tracks 3.1, 3.2, which are arranged parallel to one another, for the rail-guided circulation of two shooters 19 each.

A total of 12 guide devices 11 are assigned to the two circulating tracks 3.1, 3.2, each of which carries a warp bobbin device 9 arranged on the respective guide carriage 13.

The base body 12 of each guide device 11 extends in the axial direction over the two track bodies 4.1, 4.2 of the circulating tracks 3.1, 3.2, so that the guide carriage 13 and the entrained warp thread 15 of each guide device 11 along the base body 12, both track bodies 4.1, 4.2 and thus both track levels 8.1, 8.2 can cross and according to the exemplary operating phase Figure 8a in the image plane to the left of the first orbit 3.1, according to the operating phase Figure 8b centrally between the first and second orbits 3.1, 3.2 and according to the operating phase Figure 8c can be positioned to the right of the second orbit 3.2.

The Figures 9a, b, c show a fifth embodiment of the circular loom according to the invention for weaving a cylindrical weaving core lb.

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

To avoid repetition, only the differences from the fourth version of the circular loom are shown below Figures 8a, b, c described.

In this embodiment, the 12 guide devices 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. On each of the 24 guide carriages 13.1, 13.2 a warp bobbin device 9 is arranged, which guide the guide carriages 13.1, 13.2 with them.

The two guide carriages 13.1, 13.2 of each guide device 11 can be positioned as desired along the base body 12 which extends over both track bodies 4.1, 4.2 of the circulating tracks 3.1, 3.2.

Exemplary is in the operating phase after Figure 9a the first guide carriage 13.1 and its entrained warp thread 15 in the plane to the left of the first orbit 3.1 and the second guide carriage 13.2 and its entrained warp thread 15 centrally between the first and the second orbit 3.1, 3.2.

In the operational phase after Figure 9b The first guide carriage 13.1 and its entrained warp thread 15 is located, for example, in the middle between the first and second orbit 3.1, 3.2 and the second guide carriage 13.2 and its entrained warp thread 15 to the right of the second orbit 3.2.

In the operational phase after Figure 9c the first guide carriage 13.1 and its entrained warp thread 15 is again in the position to the left of the first orbit 3.1, the second guide carriage 13.2 and its entrained warp thread 13.2 remaining in the position to the right of the second orbit 3.2.

In the embodiments according to the fourth and fifth exemplary embodiments, an even greater number of possible weaving modes and weaving structures that can be generated can be implemented while maintaining a high weaving speed and weaving quality.

The Figures 10a, b show a circular loom according to the invention according to a sixth embodiment, here for weaving a contoured, two-part weaving core 1a, analogous to the first embodiment of the circular loom according to FIGS Figures 1 , 2a , b.

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

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

In association with the 12 warp bobbin devices 9 fixed to the housing, 12 movable, pivotable guide devices 11 are alternatively provided, which are concentric around the central weaving axis 2 of the circular loom, outside the circular orbit 3 or the path plane 8 and essentially in the extension of the radial extent of the Circulating track 3 or the track plane 8 are arranged on an outer wall of the machine housing 6 of the circular loom.

The pivotable guide devices 11 each have a swivel joint 27 fixed to the housing as a base body 27 and a positioning part 28 rotatably mounted on the swivel joint 27, which in the exemplary embodiment is designed as a swivel arm 28.

The pivot arm 28 has at its free end a thread guide element 29 for guiding and guiding the warp thread 15 in the form of a thread guide eye 29 through which the warp thread 15 is guided.

By means of the alternately pivotable swivel arm 28 with the thread guide eyelet 29, the warp thread 15 can alternate on both sides of the segmented thread to form the thread ply Orbit 3 are spent, with only a single thread deflection being required with little friction in the thread guide eye 29.

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

The supply of the warp threads 15 from the warp thread bobbins 10 via thread guide eyelet 29 further to the weaving point on the weaving core la is thus also largely straight, whereby the thread tension of the warp threads 15 can be maintained at a high level.

The alternating movement of the pivot arm 28 of each guide device 11 can be analogous to the embodiment according to Fig. 1 , 2a, b can be generated and controlled individually, for example by means of individual switchable direct drives acting in two directions (not shown).

In Figures 10a, b the two rotating gates 19 are shown schematically in the 6 o'clock and 12 o'clock position along the orbit 3.

For the sake of clarity, the Figures 10a, b only two warp bobbin devices 9 and the associated pivotable guide devices 11, namely the warp bobbin devices 9 and guide devices 11 arranged in the 6 o'clock and 12 o'clock positions of the circular loom.

The Figures 10a, b show two operating phases of the weaving process in the circular loom with alternating positioning of the pivot arms 28 with the thread guide eyelets 29 guiding the warp threads 15 during the rotation of the two gates 19 by 180 ° in each case.

In the operational phase after Figure 10a the two rotating gates 19 are in the 6 o'clock and in the 12 o'clock position of the circular loom, with the swivel arm 28 with the warp thread 15 in the thread guide eye 29 of the guide device 11 arranged in the 12 o'clock position in the The image plane is pivoted to the right of the orbit 3 and, among other things, the swivel arm 28 with the warp thread 15 of the guide device 11 arranged in the 6 o'clock position is pivoted to the left of the orbit 3 in the image plane, so that the space for the passage of the shooters 19 is released at the 6 o'clock and 12 o'clock position by the warp threads 15 splayed from the plane of the web 8 to form a ply.

Figure 10b shows the operating phase of the circular loom in which the contactor 19, which was previously at the 6 o'clock position, moves through the 12 o'clock position and vice versa, with the swivel arms 28 with the warp threads 15 at 6 o'clock and 12 o'clock -Position arranged guide devices in the plane of the picture to the right of the orbit 3 are pivoted, while the shooters 19 pass through the 6 o'clock and 12 o'clock positions.

List of reference symbols

1

Core, irregular a, cylindrical b

2

Loom axis of the circular loom

3

circular orbit, first .1, second .2

4th

Track body first .1, second .2

5

Rail segment

6th

Machine housing

7th

Guide rail

8th

Orbit level, first .1, second .2

9

Warp bobbin device

10

Warp thread spool

11

Guide device

12

Base body of the guide device

13

Positioning part, guide carriage first .1, second .2

14th

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

15th

Warp thread

16

Thread outlet

17th

Core axis

18th

Recess of the orbit, joint

19th

Contactor

20th

Rifle car

21st

Weft bobbin

22nd

Weft

23

Leadership role

24

Passage of the main body

25th

tissue

26th

Webring

27

Base body of the guide device, swivel joint

28

Positioning part, swivel arm

29

Thread guide element, thread guide eyelet

Claims (10)

Circular loom for weaving a weaving core with at least one contactor (19) which has a weft thread bobbin (21) and can be moved along a circular orbit (3) around the weaving core (1), at least one guide device (11) designed to guide at least one warp thread (15) provided by a warp thread bobbin (10) of a warp bobbin device (9), which is movably arranged or formed outside a path plane (8) enclosed by the outer circumference of the circular orbit (3), the guided warp thread ( 15), crossing the orbit plane (8), a recess (18) of the circular orbit (3) passes. Circular loom according to Claim 1, characterized in that the movable guide device (11) has at least one positioning part (13, 28) which is arranged or constructed so as to be movable or pivotable. Circular loom according to Claim 1 or 2, characterized in that a thread guide element (14, 28) of the guide device (11) is designed as a thread guide channel (14), a thread guide groove or as a thread guide eye (29) is. Circular loom according to claim 2 or 3, characterized in that the positioning part (13) is designed to be linearly displaceable. Circular loom according to one of claims 2 to 4, characterized in that the warp thread bobbin (10) of at least one warp bobbin device (9) is essentially a straight extension of the path of the warp thread (15) through the thread guide element (14, 29) and / or essentially is arranged in a straight extension of the travel or pivoting path of the thread guide element (14, 29). Circular loom according to one of Claims 1 to 5, characterized in that the warp thread bobbin (10) of at least one warp bobbin device (9) is arranged essentially as an extension of the radial extension of the circular orbit (3). Circular loom according to one of Claims 1 to 6, characterized in that at least one warp bobbin device (9) is arranged on the movable guide device (11). Circular loom according to one of Claims 1 to 7, characterized in that the circular orbit (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 contactor (19) is guided. Circular loom according to one of Claims 1 to 8, characterized in that the guide and / or the drive of the contactor (19) is magnetic and / or electromagnetic. Circular loom according to one of Claims 1 to 9, characterized characterized in that a second circular orbit (3.2) is provided, along which at least one contactor (19) can be moved, the guided warp thread (15), the path planes (8.1, 8.2) of the first and / or second orbit (3.1, 3.2) crossing, the recess (18) of the first and / or second circular orbit (3.1, 3.2) passes.

Images