EP3765661B1 - Apparatus for making a technical netting and a method of making same - Google Patents

Description

A system for producing a technical network, a method for producing a technical network and a technical network are described. Technical networks can be used for various purposes. Technical nets can be used, for example, as load securing nets or as sports nets. Instead of load securing, for example in commercial vehicles, objects or elements can also be held together with technical nets.

The technical networks described herein are not limited to the areas of application given as examples above. Due to their design, the technical nets have a high resilience both in the longitudinal and in the transverse direction. The technical networks are designed in particular as seamless networks and have in the connection area two intersecting band sections no connecting seams.

State of the art

Seamless nets are known from the prior art, with bands running at an angle to one another being meshed or knit together at the crossing points. Such nets have a significantly higher resilience than nets with sewn bands.

Out of DE 10 2010 031 052 A1 a method for producing technical networks, a corresponding network and a corresponding device are known. The device includes a knitting machine for the production of technical nets from sheets of yarn and webbing, which are meshed with one another in connecting sections. The device has a feed device which feeds webbing stored in a storage container to a processing area of the knitting machine. The thread sheets are then interlaced with webbing gaps in the webbing using a Raschel machine.

A knitting machine is therefore known from the prior art, which discloses an interlacing of thread sheets in the processing direction with threads from weft gaps. The straps are manufactured in an offline process and fed to the knitting machine via a roller, for example.

If there is a need for different webbing for a technical net, the role must be changed. In addition, the corresponding straps must be provided and stored. A knitting machine must be attached to the provided band to be adjusted. Inserting the wrong tape can even damage the knitting machine.

The production of technical networks is therefore more complex. In addition, it is by means of DE 10 2010 031 052 A1 known knitting machine only possible to a limited extent and with great effort to produce networks with different webbing configurations.

Furthermore, with DE 40 08 477 A1 describes a method of making nets with precise and square meshes and a net made by this method. During the process, several parallel warp ribbons with perpendicular weft ribbons are knitted together at the crossing points, the weft ribbons being pierced from behind by the needles forming the warp ribbons at the crossing points of warp and weft ribbons. The disadvantage here is that the weft ribbons are pierced by needles during knitting. This process partially destroys the binding of the weft ribbon, making the net unstable at these points and more likely to tear.

EP 2 407 584 A2 discloses a method for producing technical narrow fabric, a corresponding narrow fabric itself and a corresponding device for production. The narrow technical fabric has the shape of a fringed ribbon, which is particularly suitable for technical belts. It has the process step of weaving a fabric from warp threads and at least one weft thread with a knitting edge. Here the fabric is woven with a repeat, which has a weft gap and a ribbon fabric section. The fringe ribbon produced in this way is used together with other similar fringed ribbons or knitted ribbons processed into a network. The mesh is sewn or knitted together in connection areas where the tapes cross at right angles. The disadvantage here is the processing of the fringed bands into a net, which is very complex, since the weft gaps of the fringed bands must always be precisely aligned in such a way that the weft gaps are congruent with the connection areas. Otherwise, the network will have undesirable weak points where it would tend to fail under load.

Finally describes DE 33 39 205 A1 a textile structure with oblique layers of weft threads and a method and a device for producing the same. Here, the weft threads extend in a direction of essentially 45° with respect to the machine direction. The disadvantage here is that the weft threads are present individually and are not woven or knitted together to form a belt. Nets that are to be made with such a fabric are very unwieldy due to the loose layers of weft threads relative to one another. Furthermore, this publication describes much more a textile fabric than a net.

Task

In contrast, the object is to specify a system for producing a technical net and a method for producing a technical net, the disadvantages of the prior art being eliminated and a technical net with different configurations of webbing can be manufactured more quickly and easily than in the prior art of the technique.

Solution

• mindestens eine Bandherstellungseinheit, und
• eine Wirkmaschine,

wobei

• die Bandherstellungseinheit dazu ausgebildet ist, ein endloses Gurtband herzustellen,
• die Wirkmaschine mindestens eine Gurtbandzuführeinheit aufweist, welche dazu ausgebildet ist, das von der Bandherstellungseinheit bereitgestellte Gurtband der Wirkmaschine zuzuführen, und
• die Wirkmaschine mindestens eine Wirkeinrichtung zum Verwirken einer Fadenschar mit einem Gurtbandabschnitt des zugeführten Gurtbands zur Herstellung eines technischen Netzes mit sich kreuzenden Gurtbändern und Wirkbändern aufweist.

The object mentioned above is achieved by a system for producing a technical network

• at least one tape manufacturing unit, and
• a knitting machine,

whereby

• the strap production unit is designed to produce an endless strap,
• the knitting machine has at least one webbing feed unit which is designed to feed the webbing provided by the webbing production unit to the knitting machine, and
• the knitting machine has at least one knitting device for knitting a group of threads with a webbing section of the supplied webbing to produce a technical net with crossing webbings and knitting bands.

The system enables online production of technical networks. For this purpose, the webbing is produced via the webbing production unit according to the technical network to be produced. The system can also have a number of strap production units that provide straps of different designs parallel to one another.

The webbing manufacturing unit can, for example, be designed as a webbing loom and has appropriate tools for weaving the webbing. The required threads are fed to the weaving device via thread rollers.

If the technical network is intended to have webbings with different widths, the webbing production unit can change the width of the webbing as required. In addition, the webbing manufacturing unit can introduce different threads into the webbing. The threads are selected depending on the webbing to be manufactured.

In further embodiments, the strap production unit has tools, in addition to or as an alternative to a strap loom, which are provided for providing a knitted or warp-knitted strap. Furthermore, a crocheted galloon band can also be produced as a webbing using a corresponding device.

Preferably, however, woven, knitted or crocheted gallon tapes are provided via the tape production unit, since these form a better bond in the subsequent knitting process. Since, for example, a woven webbing has a more complex mesh formation, a better connection is achieved via the knitting threads meshed with the belt in the connection area of the technical net.

Webbing can be provided with or without a weft gap in the webbing production unit. In addition, the binding construction can change within a band. In further versions, the straps can be designed either with or without an active edge. This applies to webbing with a modified binding as well as to webbing without any changes in the binding.

If a webbing has weft gap sections, the weft threads in the weft gap can be passed over the weft gap at least once or twice with a weave change. Weft threads are preferably changed in weave within the weft gap in accordance with the width of the weft gap.

The webbing is fed to a processing area of the knitting machine via the webbing feed unit. For this purpose, the webbing feed unit can have grippers which grip the webbing from the webbing production unit and twist it at an angle, e.g. B. orthogonal to the processing direction in the knitting machine. The webbing is fed to a processing area.

In further embodiments, the webbing can also be introduced at a different angle to the processing direction of the knitting machine.

From the processing area, the webbing is fed to the work station of the at least one active device. The knitting device produces a knitting band in the processing direction, which is meshed with a webbing section via the knitting device at crossing points.

In further embodiments, the strap production unit has a store in which manufactured straps be stored, the Gurtbandzuführungseinheit accesses the memory. The store is designed in such a way that a pre-run for processing the webbing is provided. This does not limit the online process of manufacturing the straps. The store serves as a supply unit between a manufacturing unit designed, for example, as a ribbon loom and a transfer station of the knitting machine. The store can also serve as a buffer for the continuously manufactured webbing, with webbing sections being processed further in each case. A controller regulates the production of the straps in the strap production unit and the knitting straps via the at least one knitting device. There is thus a coordinated production. In particular, production adapted to the need for a network takes place via the tape production unit, as a result of which errors caused by incorrectly introduced tapes are ruled out.

The at least one active device can be moved transversely to the processing direction and/or in the processing direction. This allows the realization of technical nets with different widths and openings as well as different net geometries.

The knitting machine can also have a cutting device for cutting the supplied webbing to length. The cutting to length can be done using an ultrasound or a heat cutter. This is also used to seal the strap ends.

The system can also have a coating unit downstream of the knitting machine in the processing direction for coating and/or dyeing the technical mesh. The technical mesh is colored by the coating unit and/or provided with a coating which, for example, improves the mechanical properties of the technical network. A coating can also provide flame retardancy, heat protection or cut protection. In particular, with regard to aggressive media that come into contact with the technical network in use, a corresponding coating can be provided. The coating can also be provided with pigments in order to provide coloring of the technical network at the same time. A coating can also provide protection against a number of different stresses.

The system can also have a manufacturing unit downstream of the knitting machine in the processing direction for preparing nets in terms of length and width. The manufacturing unit can also have separating devices that separate the manufactured technical network into correspondingly large sub-networks. The ready-made unit makes it possible to produce the technical net according to customer requirements specifically as piece goods or tape goods or goods sold by the meter. In addition, edge fabrication is possible, with a finished technical net being provided by means of a mechanical separating cut or via ultrasound. The technical nets can be provided as piece or roll goods. If the system also has a coating unit downstream in the processing direction, then the finishing unit is located downstream of the coating unit in the processing direction.

In further embodiments, the system can have a device for preparing flat fabrics that is upstream of the knitting machine in the processing direction. Such flat Substances can be, for example, fine-meshed nets, nonwovens or textile webs. These textile webs are then fed together with the webbing to the at least one knitting device, which connects the knitting band to the webbing both in connection areas and to the supplied fabric over the entire length and width of the knitting band. At the point of intersection with the webbing, there is also a continuous connection between the knitted webbing and the webbing and the fabric located below and/or above it. Not only can a fabric be fed via the device, but it is also possible to provide both a fabric below the webbing and a fabric over the webbing.

The system can also have a detection device with at least one camera, which is provided for detecting the position and configuration of the belt webbing. The detection device is used for the precise positioning of the belt webbing when it is introduced into the processing area and into the work station of the active device. The detection device is connected to a control unit for the system and knitting machine, which controls the webbing feed unit accordingly. The alignment of the belt webbing is therefore determined via the detection device and can be corrected via the units coupled thereto.

In further embodiments, the at least one active device can be arranged and controlled according to the information obtained via the detection device. For example, the belt webbing can have connecting sections for the knitted belt, which are designed as a weft gap section or as a coarse-meshed section. The position of these sections is determined by the detection device and the at least one active device can be moved based on the information obtained.

Furthermore, a correction for the tape production unit can be obtained via the detection device. Errors or deviations in the webbing are obtained via the detection device and sent to the webbing manufacturing unit via the controller. The webbing manufacturing unit can use this information to adjust the manufacture of the webbing.

The system can also have a transmission device that is coupled to a carriage via a cardan shaft, with the carriage being movably mounted transversely to the processing direction and connected to a weft thread insertion device of the at least one knitting device for a partial weft across the knitting tape width. The weft thread also serves to adjust the width of the knitting tape. For example, the knitting tape can have convex or concave sections due to the weft thread. The weft thread also serves to give the knitting tape stability. For this purpose, the weft thread is guided over the width of the knitting tape, with a linear movement being necessary. The weft thread insertion device can have an additional basic bar, which can be moved transversely to the processing direction and deposits or inserts a weft thread over the width of the knitting tape. For a transmission of this movement, the gear shaft has a carriage, which is also only moved linearly in the same way as the additional base bar. The movement is transmitted to the carriage via the cardan shaft. The articulated shaft is coupled to a rotatable unit of the transmission device and converts the rotational movement into a linear movement. The sleigh puts sure that the PTO shaft is relatively short. This counteracts damage to the cardan shaft. In addition, the articulated shaft can be made more stable since it is only short. If the knitting machine has several knitting devices, the additional basic bars of each knitting device are coupled linearly to the carriage. For this purpose, the additional basic bars can be coupled to one another.

In further embodiments, the rotatable unit of the transmission device can have a groove or guide in which a receiving section for one end of the articulated shaft is accommodated in a displaceable manner. The width of the supplied weft thread can be set here. For example, if the position of this end of the articulated shaft is changed during production of the knitting bands, the width of the knitting band can be changed. This section can be relocated, for example, via a separate servomotor.

The transmission device itself can be connected to the rotatable units of the knitting machine via a servomotor, electromechanically or mechanically coupled. A mechanical coupling allows the additional base bar to be shifted in cycles depending on the effective speed.

In further embodiments, the belt feed unit can be designed to feed the belt at an angle of between 10° and 170° relative to the processing direction of the knitting machine. For this purpose, the webbing feed unit can have gripping elements that can be displaced in the feed direction as well as gripping elements that are arranged such that they can rotate relative to the feed direction. The feed unit can be designed in such a way that first the webbing is brought into the processing area. The belt webbing can then be aligned relative to the processing direction via the belt webbing feed unit.

In further embodiments, the webbing is already introduced into the processing area in the desired orientation via the webbing feed unit. The processing area extends along the processing direction depending on the orientation of the webbing. The at least one active device is therefore arranged downstream of the processing area in the processing direction.

The system can also have at least one sensor device which is designed to detect marking elements and/or flaws in the supplied webbing, with the feeding of the webbing and/or cutting the webbing to length being controllable based on the identified marking elements and/or flaws.

Analogously to the detection device, the sensor device can detect faults in the webbing. If an error is detected, the webbing is cut to length and the part of the webbing with the defect is fed to a disposal station via the webbing feed unit. The webbing supply unit then takes a new section of webbing from the webbing making unit and feeds it into the processing area.

Instead of defects in the supplied webbing, the supplied webbing can also have marking elements. Such marking elements can be metals, for example can be detected via a sensor device. The marking elements provide feedback on the section of the webbing. Such marking elements can also be introduced in the tape production unit. Punching elements can be provided for this purpose, for example. In further embodiments, a thread can also be worked into the belt webbing unit, which thread can be detected by a corresponding sensor device. Such threads can be electrically conductive threads, for example. Further components can later be arranged via these threads or used to check the webbing or a technical network.

The knitting machine can have a feed device which has a bar and brackets with hold-down devices arranged on the bar. The webbing is held on a work table by the hold-down devices and brought into the working area of the at least one active device.

In further embodiments, the knitting machine can have a feed device with grippers, it being possible for the webbing and/or a flat material to be fed to the work station of the at least one knitting device via the feed device. The grippers can be moved both in the processing direction and transversely to the processing direction. In further embodiments, the feed device and/or individual grippers of the feed device can be rotated relative to the processing direction, so that an alignment that deviates from an orthogonal alignment of the webbing in the processing direction is made possible. Even after aligning the webbing at an angle ≥ 90 ° relative to the processing direction on the webbing feed unit Grippers of the feed device hold the webbing in this position and feed it to the at least one active device. In addition, the grippers can not only feed the webbing to the working area of the at least one active device, but also hold at least one substance and feed it to the working area. In further embodiments, the feed device can have both grippers for the at least one fabric and grippers for the webbing, with the alignment of the fabric being different from the alignment of the webbing.

The mobility of the gripping elements relative and transverse to the processing direction makes it possible to change the distance between the grippers. This improves the provision of different net geometries with different strap openings, since the grippers can always hold the strap at the edge of a work area. The grippers also follow the position of the at least one active device. The grippers and the active device are preferably coupled to one another in terms of control technology.

The above-mentioned object is also achieved by a method for producing a technical net using a system according to the exemplary embodiments described above, with a webbing being produced in the webbing production unit, which webbing is fed to the knitting machine via the webbing feed unit, and the webbing fed to the knitting machine is knitted via the at least one knitting device in a connection area with yarn sheets.

The webbing can be fed at an angle between 10° and 170° relative to the working direction of the knitting machine. This enables the provision of engineered networks, wherein the orientation and shape of the openings in the engineered network can be diamond-shaped.

The webbing manufacturing unit enables the provision of different webbings, which can differ both in their binding type and in width. In addition, electrically conductive threads can be incorporated, for example, which enable subsequent contacting with electrical elements. Furthermore, threads that have already been dyed can also be fed into the tape production unit. In addition, it is possible to additionally supply several colored threads and/or ribbons and several differently colored threads and/or ribbons, both in the 0° and in the 90° direction. The supply here refers to the production and thus the production direction of the webbing. This produces a webbing that is already pre-dyed. This further improves the online process for creating technical networks.

In addition, it is also conceivable to feed threads that have already been coated to the band production unit.

The partial weft for the knitting strap produced by the at least one knitting device can take place in accordance with the design of the webbing. The technical network can have varying distances between the individual straps and straps, as well as straps and straps that have convex or concave shapes. This enables the provision of essentially round openings in the engineered mesh.

The coating and/or coloring by the coating unit and/or finishing by the finishing unit can take place offline or online. In a preferred embodiment, the technical network was processed online. This enables a technical network to be provided, starting from threads that are fed to the respective components, up to a ready-made technical network. For this purpose, the system can have a winding device which, after the assembly, winds up the assembled technical network and makes it available for onward transport to the customer. In alternative versions, the technical network can also be combined after assembly. Folding is suitable for networks of different sizes.

The technical network can then be provided with additional elements such as hooks. Through the preferred use of non-knit webbing, i. H. Woven, crocheted or knitted straps, the bond is significantly higher than knitted straps with the same seam pattern. The higher seam strength results from the stitch formation in woven, knitted and crocheted tapes. Hooks or other elements arranged in the crossing point or connection section of the belt straps and knitting straps can therefore be held securely with less material being used.

The at least one active device and/or the grippers of the feed device are also moved transversely to the processing direction and/or in the processing direction. In addition, the grippers of the feed device can be rotated relative to the processing direction, for example in order to position them at an angle To bring straps in the work area of at least one active device.

The structure of the webbing can be detected via the detection device and the knitting process can be controlled according to the detected structure. If the webbing has weft gaps, the knitting process can be carried out more easily in these sections than in sections that do not have such weft gaps. If webbing is to be knitted without weft gaps with the knitted ribbons, the knitting speed can be adjusted.

Furthermore, a technical net is described, which is produced according to one of the methods described above, the technical net having belt strap sections and knitted belt sections and the belt strap sections and/or the knitted belt sections having carbon threads, electrically conductive threads, dyed and/or coated threads.

In addition, at least one electronic and/or electromechanical unit can be connected to at least one thread of the webbing and/or the knitted webbing. For example, lighting devices such as LEDs can be connected to electrically conductive threads, so that the technical network can be illuminated with a low electrical power. Furthermore, strain gauges can be introduced into the corresponding sections of the technical network. This enables a load on the technical network to be detected. The strain gauges of the technical network can be coupled to a device that transmits a message to a computing unit when a maximum permissible stress is reached.

Further advantages, features and possible configurations result from the following description of the figures of exemplary embodiments which are to be understood as limiting.

Brief description of the characters

Fig. 1

eine schematische Darstellung einer Anlage zur Herstellung von technischen Netzen mit einer Bandherstellungseinheit und einer Wirkmaschine;

Fig. 2

eine weitere schematische Darstellung einer Anlage zur Herstellung von technischen Netzen mit einer Bandherstellungseinheit und einer Wirkmaschine;

Fig. 3

eine weitere schematische Darstellung einer Anlage zur Herstellung von technischen Netzen mit einer Bandherstellungseinheit und einer Wirkmaschine;

Fig. 4

eine noch weitere schematische Darstellung einer Anlage zur Herstellung von technischen Netzen mit einer Bandherstellungseinheit und einer Wirkmaschine;

Fig. 5

eine schematische Darstellung einer Anlage zur Herstellung von technischen Netzen mit einer Bandherstellungseinheit, einer Wirkmaschine, einer Beschichtungseinheit, einer Konfektionseinheit, einer Wickeleinheit und einer Einrichtung zur Bereitstellung von Stoffen;

Fig. 6

eine schematische Darstellung einer Zuführeinrichtung;

Fig. 7

eine schematische Darstellung einer alternativen Zuführeinrichtung;

Fig. 8

eine schematische Darstellung der Getriebeeinrichtung einer Wirkmaschine;

Fig. 9

eine schematische Darstellung eines technischen Netzes und von Wirkeinrichtungen einer Wirkmaschine; und

Fig. 10

eine schematische Darstellung eines technischen Netzes mit Gurtbändern und Wirkbändern.

In the drawings shows:

1

a schematic representation of a plant for the production of technical nets with a tape production unit and a knitting machine;

2

a further schematic representation of a plant for the production of technical nets with a tape production unit and a knitting machine;

3

a further schematic representation of a plant for the production of technical nets with a tape production unit and a knitting machine;

4

yet another schematic representation of a plant for the production of technical nets with a tape production unit and a knitting machine;

figure 5

a schematic representation of a plant for the production of technical nets with a tape production unit, a knitting machine, a coating unit, a manufacturing unit, a winding unit and a device for providing fabrics;

6

a schematic representation of a feeder;

7

a schematic representation of an alternative feeding device;

8

a schematic representation of the transmission device of a knitting machine;

9

a schematic representation of a technical network and knitting devices of a knitting machine; and

10

a schematic representation of a technical network with straps and knitting straps.

In the drawings, parts provided with the same reference numbers correspond essentially to one another, unless otherwise indicated.

In addition, it is omitted to describe and show components that are not essential for understanding the technical teaching disclosed herein.

Detailed description of exemplary embodiments

1 shows a schematic representation of a system 10 for the production of technical nets 90 with a tape production unit 12 and a knitting machine 20.

The ribbon manufacturing unit 12 includes a ribbon loom 14 and a store 16 . An endless webbing 92 is produced via the ribbon loom 14 . Instead of a woven Webbing 92 can also be used to create knitted or crocheted webbing. The webbings 92 are produced online, ie the webbings 92 are produced in the knitting machine 20 before further processing and are fed directly to it. In the memory 16, the webbing 92 is stored over a certain length. The storage 16 serves as a buffer between the ribbon loom 14 and the knitting machine 20. The webbing 92 is manufactured as an endless webbing and fed to the knitting machine 20 via an interface. The strap production unit 12 is designed as a textile device for producing the straps 92 and has a corresponding device with needles for the differently designed straps 92 . The required threads are fed to these needles via thread rollers. Various types of webbing can be produced in the webbing production unit 12 .

The difference between the good bands 92 relates both to their binding and to the number and type of threads used. It is therefore possible to introduce an additional thread only into a specific area of the webbing 92 during production online. In addition, the belt straps 92 can have a different width from one another. For this purpose, the webbing 92 can have a transition section which is cut out by a cutting device 24 and fed to a disposal station.

The knitting machine 20 has a processing area into which the webbing supply unit 22 introduces the webbing 92 . The webbing feed unit 22 preferably has a gripper which fetches a webbing 92 from the store 16 in the direction of the arrow 112, orthogonally to the processing direction 110 and deposited in the processing area. For this purpose, several grippers can be provided, which also determine the position of the webbing 92 in relation to the alignment to the processing direction 110 . A detection device with at least one camera monitors the insertion and the position of the webbing 92. After the webbing 92 has been aligned, the webbing 92 is severed via the separating device 24 to provide a webbing section which is then processed further. Laser cutting or hot cutting can be used for this purpose. The methods described also enable the cut-off end of the strap 92 to be sealed. In the following, the term strap 92 is always used, even if strap sections are meant.

The knitting machine 20 has four knitting devices 46 in the exemplary embodiment. The knitting devices 46 comprise several basic bars for thread guidance and for knitting the supplied threads. The thread is fed via a thread feed unit, not shown in the figures, which feeds the threads to the individual knitting devices 46 . The knitting devices 46 produce knitting tapes 94 by interlacing the supplied threads.

The processing area of the knitting machine 20 has a width of, for example, 2 m to 5 m, as a result of which correspondingly wide technical nets 90 can be produced. In exemplary designs as a load securing net, the nets can have a width of, for example, 2.4 m. The length of the technical net 90 does not depend on the width of the processing area but is determined by the length of the knitting tapes 94 produced by the knitting devices 46 .

2 shows a further schematic representation of a plant 10 for the production of technical nets 90 with a band production unit 12 and a knitting machine 20. In 2 gripping units 32 of a feed device 26 are also shown. The feed device 26 is used to feed the webbing section 42 into the working area of the active devices 46. For this purpose, the individual gripping units 32 have grippers 30 which hold the webbing 92. Like the active devices 46 , the gripping units 32 can be displaced orthogonally to the processing direction 110 in the direction of the arrow 112 . This makes it possible to change the distances between two knitting bands 94 . The distances between two webbings 92 can be regulated via the feeding speed of the good slivers 92 and the effective speed via the effective devices 46 .

In order to change the distances between the knitting bands 94, the gripping units 32 and the knitting devices 46 can be relocated online or offline. When the knitting units 46 are shifted, the gripping units 32 must also be shifted accordingly so that the webbing 92 is held securely in the working area of the knitting devices 46 and is not deformed by needles piercing the webbing 92 .

In the 1 and 2 a webbing 90 is shown schematically, with the webbing 92 being knitted together with the knitted straps 94 in the connecting sections 96 .

3 shows a further schematic representation of a system 10 for the production of technical nets 90 with a tape production unit 12 and a knitting machine 20, wherein the feed device 26 has a bar 28 on which the bracket 29 has hold-down devices 31 (see 6 ) are arranged.

The brackets 29 can be displaced offline or online along the beam 28 to accommodate a displacement of the active devices 46.

Both the feeder 26 of 2 as well as the feeder 26 of 3 can be shifted in the processing direction 110 in order to successively feed the webbing 92 to the working area of the knitting devices 46 when knitting with the knitting tapes 94 . After the webbing 92 has been essentially completely meshed with the knitting bands 94 , the feeders 26 resume their original position and grip a new webbing 92 that has been introduced into the processing area of the knitting machine 20 via the webbing feed unit 22 .

4 shows a further schematic representation of a system 10 for the production of technical nets 90 with a tape production unit 12 and a knitting machine 20. This representation shows a transmission device 34 which is coupled via a mechanism to additional base bars 44 of the respective knitting devices 64. The additional ground bars 44 are part of weft devices. A weft thread is guided across the width of the knitting tapes 94 over the ground bars 44 . For the transmission of the rotational movement of the gear mechanism 34 into a linear movement of the respective base bars 44, these are coupled to a carriage 42. Like the base bars 44, the carriage 42 can only be moved in the direction 112. A disc 36 of the transmission device 34 is connected via a cardan shaft 40 is connected to the carriage 42, so that a rotary movement of the transmission device 34 is transferred into a linear movement of the carriage 42. The transmission of the rotational movement into the linear movement of the carriage 42 makes it possible to provide high speeds through the transmission device 34 without the components of the transmission device 34 or the carriage 42 or the articulated shaft 40 being damaged. If the individual basic bars 44 were connected directly to the cardan shaft 40, this would have to be longer, which would damage the cardan shaft 40 at high speeds. The carriage 42 serves as a transmission element and can therefore be arranged in the immediate vicinity of the transmission device 34 . The transmission device 34 can be controlled via a servo motor. In further embodiments, the transmission device 34 is mechanically coupled to further drive devices of the knitting machine 20, so that a clocked displacement of the base bars 44 is achieved. The coupling represents one of the effective or Feeding of the weft threads adapted to the transport speed.

figure 5 shows a schematic representation of a system 10 for the production of technical nets 90 with a tape production unit 12, a knitting machine 20, a coating unit 50, a manufacturing unit 60, an angle unit 70 and a device 80 for providing fabrics 100.

The device 80 for providing fabrics 100 is arranged upstream of the knitting machine 20 in the processing direction 110 . About the device 80, for example, fine-mesh nets, fleece or textile webs are supplied with be permanently connected to the technical network 90. Alternatively, flat plastic webs can also be fed. For this purpose, the device 80 has a further feed device, which brings the fabric 100 into the processing area with the knitting machine 20 . For example, the fabric 100 can be placed under the webbing 92 located in the processing area. For this purpose, the material 100 is first brought into the processing area and then the webbing 92 is brought into the processing area via the belt webbing feed unit 22 and placed on the material 100 . The webbing 92 and the fabric 100 are then brought into the working area of the active devices 46 via the grippers 30 of the feed device 26 . There, the knitting tapes 94 are meshed with the webbing 92 and meshed with the fabric 100 located underneath. In particular, the knitting tapes 94 are connected to the fabric 100 over their entire extent in the processing direction 110 .

After a webbing 92 has been joined to the knitting bands 94 along with a lower edge of the fabric 100, the grippers of the feeder 26 return to the home position in the processing area and pick up a new webbing 92 fed from the webbing feed unit 22 and bring this into the work area. The finished webbing 90 is continuously fed out in the processing direction 110 via a transport device, not shown in the figure, depending on the production speed. In an embodiment with an additional layer of fabric, the fabric 100 is therefore permanently guided in the processing direction 110 via the transport device, so that only the further belt straps 92 are gripped for the further technical net 90 and into the working area the active device 46 must be brought. The fabric web is transported by transporting the technical net 90.

In figure 5 the technical network 90 is shown schematically, which has no fabric web 100 . It is therefore also possible in the system 10 to feed the material web 100 to the technical network 90 only later, with the endless network 90 being divided into partial networks in a ready-made section, which can be supplied to different applications.

After the technical network 90 has been produced, it is coated in the downstream coating unit 50 . The coating includes both coloring of the technical net 90 and a coating with protective coatings that counteract mechanical or chemical stress and damage to the threads of the technical net 90 .

Downstream of the coating unit 50 is a manufacturing unit 60 in which the technical network 90 is divided into corresponding sub-networks. Separating devices with a hot cutter or ultrasonic cutting devices can also be provided for this purpose. The technical net 90 is assembled in the assembly unit 60 according to customer requirements and then fed to a winding unit 70 which is downstream of the coating unit 50 and the assembly unit 60 in the processing direction 110 .

The winding unit 70 can have a winding claw. The technical net 90 or the fabricated net sections of the technical net 90 are wound onto the winding loop.

The coating unit 50, the manufacturing unit 60 and the winding unit 70 can have further transport devices which guide the technical network 90 in the processing direction 110.

The coating in the coating unit 50, the finishing in the finishing unit 60 and the winding in the winding unit 70 take place online for the knitting process in the knitting device 20. The entire system 10 therefore produces a technical net 90 in a ready-made size starting from threads in an online process . The finished technical net 90 then has a corresponding coloring and coating as well as the desired size. Subsequently, hooks or other elements can optionally be attached to the connecting sections 96 or the ends of the straps 92 or knitting straps 94 .

6 shows a schematic representation of a feed device 26 with a beam 28 and hold-down devices 31 which are fastened to a beam 28 via a bracket 29 . The hold-down devices 31 press a webbing 92 against a work table 21 and feed the webbing 92 to the active devices 46 . The knitting devices 46 are shown schematically and have a large number of bars with guide needles and compound needles. In addition, the knitting devices 46 include the additional basic bar 44 for feeding the weft thread across the width of the knitting tape of the knitting tapes 94.

The bracket 29 with the hold-down device 31 can be displaced both in the direction of the arrow 114 and in the direction of the arrow 116. The shift in the direction of the arrow 116 takes place via a process of the beam 28, the webbing 92 through the shift into the working area of the active devices.

7 shows a schematic representation of an alternative feed device 26 with a gripping unit 32, as already for the system 10 of 2 was described. The gripping units 32 have the grippers 30 at their lower end, which can also be moved in the direction of the arrow 116 and in the direction of the arrow 114 . For example, a webbing 92 and a fabric 100 located underneath can be gripped via the grippers 30 and fed to a working area of the knitting devices 46 . The work table 21 can be designed accordingly in such a way that the webbing 92 held by the grippers 30 can be fed to the active device 46 without being deformed.

8 shows a schematic representation of the transmission device 34 of a knitting machine 20. The driven pulley 36 additionally has an opening 38. FIG. A first end of the cardan shaft 40 is accommodated within this opening 38 . This end can be displaced in the direction of arrow 118 within the opening 38 via a servomotor or other means so that the movement of the carriage 42 and thus the additional base bars 44 in the direction of the arrow 120 varies. The width over which the weft thread is guided through the ground bars 44 changes accordingly. The width of the active bands 94 can be changed via this. For example, the knitting bands 94 can thereby assume convex or concave shapes.

Due to the short transmission distance of the rotary motion in the direction of arrow 112 into the linear motion in direction of the arrow 120 via the cardan shaft 40, very high rotational speeds can be achieved. This makes it possible to carry out the knitting process more quickly.

9 shows a schematic representation of a technical network and of knitting devices 46 of a knitting machine 20. The design of the different versions of the systems 10 shown in the figures also make it possible to provide technical networks 90 with webbing 92 and knitting belts 94, which run essentially at an angle to one another and none have a right-angled arrangement to each other.

9 shows a scrim of intersecting straps 92 which are brought via the strap feed unit 22 into the processing area of a knitting machine 20 . The alignment of the belt straps 92 is maintained via the feed devices 26, with the feed device 26 feeding the belt straps 92 in the desired orientation to the working area of the active devices 46. For several intersecting straps 92, the feed device 26 can have several independently controllable grippers 30. In addition to a first feed device 26, at least one second feed device 26 can be provided. The intersecting straps 92 are additionally meshed with the knitting strap 94 in the sections. The knitting straps 94 are meshed with the two belt straps 92 in these connecting sections 96 . The supplied straps 92 can be supplied as either continuous woven, knitted or crocheted straps 92 . However, if these have a different binding in their connection areas, then the design of these binding sections must follow the oblique arrangement of the belt straps 92 . For such a change in binding in these connecting sections an obliquely tied jacquard binding can be inserted. Advantageously, for the second webbing 92, which crosses a first webbing 92, the binding is introduced mirrored, so that in the connection area of the webbing 92 there is an essentially congruent superimposition. Then the intersecting belt straps 92 are meshed with the knitting straps 94 .

10 shows a schematic representation of a technical network with straps 92 and knitted straps 94 which are meshed with one another in connecting sections 96 . In 10 the weft thread 98 is also shown, which is guided across the width of the knitting tapes 94 and gives the knitting tapes 94 additional stability and specifies the width of the knitting tapes 94.

One advantage of a so-called knitted weave is that compared to a knitted connection of knitted webbing with a knitted webbing, a significantly higher seam strength is achieved with the same seam patterns. The connecting sections 96 are therefore more resilient than connecting areas in the case of purely knitted connecting points.

Fastening elements such as hooks can be attached to the connection points 96 . In addition, electrically conductive threads can be introduced into the belt straps 92 and/or knitted straps 94 . These enable both a power supply for the energy supply and a determination of a load on the technical network 90, since changes in the resistance of the electrically conductive threads occur as a result of deformation.

The systems 10 described here enable the online production of technical nets 90 starting from threads up to a ready-made technical net 90.

In a system 10, detection devices with at least one camera and sensor devices can also be provided. The belt straps 10 introduced can be recorded by cameras and the pattern recorded can be compared with example patterns stored in a memory. If the pattern of the received webbing 92 deviates from a specification, such as defects, this section can be separated via the separating device 24 and fed to a disposal device of the knitting machine 20 or the system 10 . The webbing feed unit 22 then accesses the webbing production unit 12 and takes a free end of the endless webbing 92 and brings it into the processing area of the knitting machine 20. Only after the webbing 92 has been positively compared with a pattern via the detection device or has been recognized as error-free via sensor devices, the webbing 92 can be fed to the working area of the active devices 46 via the feed devices 26 .

If an inserted webbing 92 has a weft gap or a connecting section designed in some other way, this can also be recorded by a camera. The camera then controls the belt feed device 22 with corresponding gripping elements in such a way that the belt webbing 92 is aligned in accordance with the alignment of the active devices 46 or causes the active devices 46 and the grippers 30 to be aligned in accordance with the recorded data.

In further specific embodiments, a controller specifies how a technical network 90 to be produced is to be designed. Accordingly, the active devices 64 can be positioned in advance. The supplied and required webbing sections are then manufactured online in the webbing manufacturing unit 12 via the endless webbing 92 . The configuration of the width of the webbing 92 can vary, as can the binding of the webbing 92 . In addition, the webbing 92 can also have convex or concave areas with regard to the formation of the distances of the technical net 90 . For this purpose, analogously to the knitting tape 94 , a weft thread is guided across the width of the webbing 92 in the tape manufacturing unit 12 .

Reference List

10

Attachment

12

Tape Making Unit

14

ribbon loom

16

Storage

20

knitting machine

21

work table

22

webbing feed unit

24

separator

26

feeding device

28

bar

29

hanger

30

gripper

31

hold-down

32

gripping unit

34

gear mechanism

36

disc

38

opening

40

cardan shaft

42

Sleds

44

ground bar

46

active device

50

coating unit

60

assembly unit

70

winding unit

80

Device for providing substances

90

technical network

92

webbing

94

knitting tape

96

connection section

98

weft thread

100

panel

110

processing direction

112

Arrow

114

Arrow

116

Arrow

118

Arrow

120

Arrow

122

Arrow

Claims (16)

1. Apparatus for making a technical netting (90) comprising

   - at least a belt manufacturing unit (12), and

   - a knitting machine (20),

   wherein

   - the belt manufacturing unit (12) is configured to manufacture an endless belt strap (92),

   - the knitting machine (20) having at least a belt strap feeding unit (22), which is configured to feed the belt strap (92) provided by the belt manufacturing unit (12) to the knitting machine (20), and

   - the knitting machine (20) having at least a knitting unit (46) to knit a thread group with a belt strap section of the fed belt strap (92) to manufacture a technical netting (90) with crossing belt straps (92) and knitting straps (94)

   characterized in that
   the at least one knitting unit (46) is movable transversely to the processing direction (110) and/or in processing direction (110).
2. Apparatus according to claim 1, wherein the belt manufacturing unit (12) having a storage (16), in which the manufactured belt straps (92) are stored, wherein the belt strap feeding unit (22) having access to the storage (16).
3. Apparatus according to any of the claims 1 to 2, wherein the knitting machine (20) having a separation unit (24) for cutting the fed belt strap (92) to length.
4. Apparatus according to any of the claims 1 to 3, having a coating unit (50) in processing direction (110) downstream to the knitting machine (20) for coating and/or colouring the technical netting (90).
5. Apparatus according to any of the claims 1 to 4, having a confection unit (60) in processing direction (110) downstream to the knitting machine (20) for providing nets in length and widths.
6. Apparatus according to any of the claims 1 to 5, having an unit (80) in processing direction (110) upstream to the knitting machine (20) for providing flat fabrics.
7. Apparatus according to any of the claims 1 to 6, having a detection unit with at least one camera to detect the position and configuration of the belt strap (92).
8. Apparatus according to any of the claims 1 to 7, having a gear unit (34), which is coupled via a cardan shaft (40) to a carriage (40), wherein the carriage (40) is movable mounted transversely to the processing direction (110) and is connected to a weft insertion unit of the at least one knitting unit (46) for a partial weft over effective width.
9. Apparatus according to any of the claims 1 to 8, wherein the belt strap feeding unit (22) is configured to feed the belt strap (92) to the knitting machine (20) in an angle between 10° and 170° relative to the processing direction (110).
10. Apparatus according to any of the claims 1 to 9, having at least a sensor unit, which is configured to detect marker elements and/or defects in the fed belt strap (92), wherein the feeding of the belt strap (92) and/or the cutting of the belt strap (92) are controllable according to the detected marker elements and/or defects.
11. Apparatus according to any of the claims 1 to 10, wherein the knitting machine (20) having a feeding unit (26) with grippers (30) and the belt strap (92) and/or the flat fabric (100) is feedable to the working station of the at least one knitting unit (46) via the feeding unit (26).
12. Method for making a technical netting (90) by using an apparatus (10) according to the claims 1 to 11, wherein inside the belt manufacturing unit (12) a belt strap (92) is produced, which is fed to the knitting machine (20) via the belt strap feeding unit (22), and wherein the belt strap (92) which is fed to the knitting machine (20) is knitted at a connection zone via the at least on knitting unit (46) with the thread group, wherein the at least one knitting unit (46) and/or the grippers (30) of the feeding unit (26) are moved transversely to the processing direction (110) and/or in processing direction (110).
13. Method according to claim 12, wherein the belt strap (92) is fed to the knitting machine (20) in an angle between 10° and 170° relative to the processing direction (110).
14. Method according to claim 12 or 13, wherein the partial weft for a knitted band strap (94), which is manufactured by the at least one knitting unit (46), is made according to the configuration of the belt strap (92).
15. Method according to any of the claims 12 to 14, wherein the coating and/or the colouring is done offline or online by the coating unit (50) and/or the confection is done offline or online by the confection unit (60).
16. Method according to any of the claims 12 to 15, wherein the structure of the belt strap (92) is detected via the detection unit and the knitting process is controlled according to the detected structure.

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