DE2441839A1 - METHOD AND DEVICE FOR BUILDING UP AND SHEARING IN THREE-AXIS WEAVING - Google Patents

Description

Priority from 1O ₀ September 1973 in USA, Ser.No.395529

The invention relates to a method and apparatus for formation triaxial warp beams, their tree products and the triaxial weaving of these trees, in particular for manufacture stabilized triaxial fabric of the type described in U.S. Patent 3,446,251 (Dow). In particular, the invention relates to a warp beam in which the arrangement of the warp yarn paths spiraling around the Tree wound is provided for a transverse movement (with respect to the warp yarn paths) of the warp yarn runs if they are one Loom for three-axis fabric are fed to the requirements of the loom for a transverse movement and for

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transport of chains from top to bottom (and vice versa) to match at the edges of the cloth.

A significant limitation in the art of triaxial fabric has been the problems involved in designing it commercially practical devices for reliably producing such fabrics at reasonable costs and speeds occurred.

A particular problem of this type has been the difficulty of traversing the multitude of warp yarn runs and feeding the yarn for such runs back and forth across the width of the fabric as well as feeding the end yarns to the fabric edges from above down or vice versa. In three-axis weaving, as opposed to two-axis weaving, these problems are particular Art.

Prior to the invention, attempts have generally been made to solve the problems by attaching warp yarn feeders to a moving cart or rotating yarn feeder package holder (see, for example, "Preliminary Investigations of Feasibility of Weaving Triaxial Fabrics (Doweave)" -Dow, Textile Research) Journal, Vol. KO, No. 11, Nov. 1970, pages 986-998 and "Triaxial Woven Fabrics: Their Structure and Properties ^M -Skelton, Textile Research Journal, Vol. 41 _S No. 8, August 1971).

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In a device for the production of tissue or These holders and trolleys and the associated yarn transport devices are fabric of any practical size easily complicated and expensive.

The purpose of the invention is therefore to create a warp beam which is suitable for three-axis cloth weaving.

The object of the invention is to create a device for producing warp yarn trees, which in particular are suitable for triaxial fabric formation. Expediently, an improved method for three-axis weaving provided, which uses such warp yarn trees ",

According to the invention, a three-axis woven warp beam is used formed by taking up a large number of approximately parallel warp yarn runs on a receiving device, while the feeding device and the receiving device rotate relative to one another about a line between them around which the warp yarns are arranged. Once the warp yarns get near the reception facility they take the form of a flat sleeve. The warp beam according to the invention therefore consists of a large number of Runs of yarn that form a flat tube that spirally or is wound helically on itself, with individual yarn runs of the same being arranged in paths,

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which are generally parallel to each other and helical with respect to the longitudinal axis (or warp yarn centerline) of this sleeve run o

Such a warp beam for three-axis weaving is according to the invention formed in an apparatus having a creel carrying a plurality of warp yarn supply packages carries and has feed packages disposed about the warp yarn centerline, the warp yarns extend from there to an arm receiving device. Either the receiving device or the gate device becomes rotated about the warp yarn centerline relative to the other. This creates the helical action of the warp yarns in the flat sleeve on the receiving device.

The speed at which the yarns are moved around the warp yarn center line is preferably a specific one Dimensioning with respect to the speed of the receiving device kept such that the preferred angle of incline is maintained in the warp yarns on the take-up device. The slope angle corresponds to that Angle of the warp yarns to the center line of the three-axis final weave. Most stabilized or smoothed triaxial bonds of the type to which this invention is directed, this angle is preferably about

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In all cases, the unit length of the flat sleeve on the warp beam, i.e. the length of the sleeve in which a single course of yarn moves across the center line of the tube, which makes a complete movement around the circumference of the sleeve, the same as the length of the finished woven fabric a single yarn run from its one edge to the opposite edge and back to the first edge wanders.

When weaving according to the invention, a three-axis warp beam is used in which one unwinds the sleeve and from it feeds the warp threads to a three-axis cloth loom in which the transverse movement of the warp yarn runs in the warp beam is the desired warp yarn transport mechanism in the loom follows to enable and simplify the feeding of these warp yarns into such a loom. So move the individual warp threads across the fabric and from the edge to edge and become from the bottom or the "lower" warp yarn row nacl ^ bben or to the "upper" side (or vice versa) transported synchronously with the corresponding transverse movement and with the transport of the warp yarn in the woven fabric.

Further advantages, features and possible applications of the invention emerge from the following description in Relation to the drawings. Show it:

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Figure 1 is an isometric view of a simplified embodiment the device for producing a three-axis warp beam,

Fig. 2 and 3 individual views of certain warp yarn guides, which are used in the device of Fig. 1,

FIG. H shows a plan view of a multiplicity of warp threads when they are arranged in a three-axis warp thread tree,

Figure 5 is an end view of the plurality of warp yarns shown in Figure h;

Fig. 6 is a schematic plan view of the three-axis Fabric weaving device in which warp yarns of the device are fed from a three-axis warp beam,

Fig. 7 is a side view of the device shown in Fig. 6,

8 shows a schematic plan view of a stabilized or smoothed three-axis woven fabric;

9 shows a schematic representation of another embodiment the device for the production of warp beams, in plan view, for three-axis weaving, and

FIG. 10 is a schematic side view of the device shown in FIG.

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Shown in Fig. 1 is gate 10 on which a plurality of warp yarn supply packages either in the form of conventional warp beams or individual bobbins, three of which typical such bobbins 12 are shown. Warp yarns are guided by such Zuführpakkungen through individual guides, of which three typical guides 1 shown k, and from there along the thread paths 16, which are arranged around a Kettgarnweg-centerline in general, which extends from the gate 10 continues, the Yarn paths or paths 16 generally form a closed or tubular or sleeve-like shape, are then modified and altered by elongated inner and outer guides 18 and 19 to a flat-sleeve shape such that the warp yarns therein are arranged symmetrically about a plane parallel to the Axis of a receiving device 20 is arranged on which the flat sleeve-like shape 21, which is formed from a plurality of warp yarn runs, is wound spirally or helically onto itself, the speed and movement of the receiving device 20 being controlled by a roller 23 driven over the surface becomes that with the surface of the K ettgarne is held in engagement and. is wound onto the receiving device 20 by a spring device Zk. The surface drive roller 22 is in turn driven, for example, by an electric motor 26 which is energized and controlled by a drive control source 28 »60981 1/0797 '

An angle of inclination will be the one on the receiving device 20 wound warp yarns due to a relative rotational movement of the creel 10 and the receiving device 20 communicated about the yarn path center line. The warp yarn paths 16 from the supply packages 12 on the creel 10 to the Receiving device 20 form a closed sleeve-like Shape which is arranged around the warp yarn centerline. The relative rotational movement of the gate 10 with the warp yarn feed packaging 12 located thereon and the take-up device 20 is such that the warp yarn supply packages by a closed path around this Axis to be moved around.

In the embodiment of the invention shown here in FIG this is ensured by means of gear engagement of the gate 10 with the drive gear 30, which in turn is driven by a second electric motor 32,

from
which in turn / a drive control source 28 is energized and controlled. The gate 10 is supported by idler rollers 35.

A second guide for the collection warp yarn paths, in particular a length compensating guide 3 ^ · »is arranged between the gate 10 and the receiver 20 to measure the length of the yarn paths between their respective warp yarn supply packages on the creel 10 and their corresponding positions on the receiver to level or equalize on the recording device 20,

The guide device 3k or 18 is shown in greater detail in FIGS. It is shown schematically as being elongated in the vertical direction only (to elongate the ¥ eg of the yarn runs located near the horizontal ends of the tubular or sleeve-like shape formed by the gathering warp yarn runs). The exact actual shape of the guide device must of course be determined in detail to ensure that all yarn path lengths in their series are the same. In order to enable the arrangement, it should also be noted that the guide device 3k consists of two separable segments or sections 3 ^ a and 3kh consists, the ends of which interlock telescopically for easy arrangement.

Similarly, the guide device 18 (similar to guide device I9) is horizontally elongated, in order to form the collective design immediately prior to its inclusion on the inclusion device 20. The guide device 18 also consists of separable sections 18a and 18b to facilitate assembly. The. Management facility 19 is supported on a cantilever arm, which is not shown and which is firmly attached behind the gate 10.

In FIG. ₀ k , a three-axis warp yarn row is shown as it can be seen when it is unwound from a three-axis warp yarn beam. In the flat-sleeve shape,

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which together from the majority of those in Pig. 4 is formed, each warp yarn moves progressively, as it passes along the warp centerline, from one edge of the flattened configuration to theirs other edge and then from the bottom to the top (or vice versa) of the flat sleeve and back to the first edge. This movement is the same as the movement of any warp yarn in a triaxial fabric running across and from the bottom chain to the upper chain (or vice versa), and in particular the movement in a stabilized or smoothed triaxial fabric of the type described in US patent 3,446,251-Dow.

In the three-axis path warp yarn tree according to the invention, as shown in Figure 4, all of the respective warp yarn paths are helical about the warp yarn centerline arranged around. ¥ As the angle of inclination is concerned here, this is the same as that of every warp yarn in the fllah-sleeve-like Shape formed with the warp yarn center line, as shown in Fig. 4 and indicated by the angle oC in Fig. 4 is.

The row of warp yarns in FIG. 4 can be seen in an end view in FIG. 3, with a warp yarn end holder 36 shown in section is. Such a holder can enable the ends of the triaxial warp beam to be transported to a loom.

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This holder can have a flattened elongated plastic body with an adhesive surface thereon. Thus, each end of the warp yarns on the warp beam can easily be transferred to a specific location in the loom assembly. Alternatively, instead of having a flattened configuration as shown in cross-section in the end view, the weaving yarn end holder 36 may be rotated so that the warp yarn ends can be rotated to enable their transfer to specific locations in the loom assembly. When used in this manner, a spreader roller or fabric tensioner roller or roller maintains the angular bearing of the warp yarns thereon by frictional engagement with the surface of the warp beam when the warp yarns are drawn off, while the circular warp yarn retainer is rotated about its axis when the warp yarns are pulled are withdrawn from the tree so that they extend from the tree in a parallel, non-helical position and are arranged in certain positions in the warp yarn feed system of a three-axis cloth loom, as shown in plan view in FIG. According to Fig. 6, a three-axis warp beam 38 is arranged for the supply of warp yarns through a friction engagement roller 40 via tension adjustment brackets 41 and tension compensators 42 through sawtooth warp yarn transverse transmission mechanisms 44, the yarns via strands or aids 46 'through weaving guides 48 to form a skin line 50 go,

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where the warps are woven into triaxial fabric 52. Loads or bat $ k are intermittently inserted between warp yarns after the insertion of a weft by a shuttle mechanism, not shown, whereby the weft or any cutting warp yarn runs between the bat and the skin line 50 are wrapped into them to a three-axis Fabric 52, for example of the type shown in Fig. 8 (which corresponds to that of Fig. 1 of US Pat. No. 3,446,251), as can also be seen from Fig. 3 of US Pat. No. 3,446,251. A typical shed formation for making the latter interwoven is shown in FIG. 7, a side view of the device shown in FIG. Referring to Fig. 7, it will be seen that strands or supports 46 have formed some, but not all, of the warp runs into a shed at a particular step in the weaving cycle of the fabric 52 so that the weft over and under selected runs of both the upper and lower warp run groups runs when they are fed from the tree 38 to the fur line 50 in a flacJahülsen-like shape.

When operating the "device shown in Fig. 1 and after one performs the method shown in FIGS. 1, 6 and 7 A plurality of warp yarn feed packages supply warp yarn through a plurality of warp yarn paths 16, the path as a whole do the warp yarn centerline is located around and forms a closed tubular configuration that extends from

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elongated guides 18 and 19 converted to flat sleeve shape so that it is picked up by a pick-up device 20 on a tree. The relative rotation between the gate 10, on which supply reels 12 are attached, and the receiving device 20 (in particular the rotation of the gate 10 of the device shown in Fig. 1) allows the corresponding warp yarn paths transversely each path and generally around the circumference of the closed path of the supply packages about the warp centerline wander around, whereby a pitch angle about the warp yarn centerline is communicated to the warp yarns when they are guided to the receiving device 20. The proportional control of the speed rate of the pickup device 20 and the relative rotation between the gate 10 and the receiving device 20 divides the from the receiving device 20 received warp yarns with a predetermined pitch angle. In the one shown in FIG Device are the drive control source 28 or an integrated common drive device for the Receiving device 20 and the rotating gate 10 designed in such a way and precisely controlled so that they have a specific constant and predetermined helix angle for the warp yarns produce. This angle, measured by the angle that each warp yarn makes with the warp yarn center line in The plan view of the / flat shape is preferably 30 (although it may vary slightly from this amount can). This angle corresponds to the angle of the warp yarns

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in most triaxial tissues, their formation is achieved by using the three-axis warp beam according to the invention.

¥ enn the warp yarns from the take-up device 20 in Their flat sleeve-like shape are taken, of course, they take a generally paralele Position to each other and a helical position with respect to the center line of the general warp yarn paths and in particular the center line of the flat-sleeved Shape the yarn as soon as it comes off the take-up device 20 can be included. Further, this flat sleeve-like shape can be implemented through a variety of warp yarn paths formed are described, which are arranged symmetrically about a median plane that is parallel to the axis the receiving device 20 is located.

As can be seen in Figures 6 and 7, the warp beam becomes 38 then to the three-axis fabric weaving machine or to Loom where the warp yarns from tree 38 in a direction parallel to the warp yarn centerline and across various tension control devices, transverse transport devices and strands to the hide line 50 of the loom be removed. The upper half of the warp yarns in the flat sleeve-like shape of the warp yarns on the Tree is attached to the top chains 90 in the loom while the lower half of the sleeve becomes the lower chains 92.

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In the course of weaving, the woven fabric is intermittently advanced and the warp yarn runs extending from the warp beam 38 to the fur line 50 are transported or caused to travel a certain distance across the warp yarn paths. This is ensured due to the transverse movement or transverse migration of the warp yarns in the helically wound, flat sleeve-like shape of the yarns on the beam 38 when the beam 38 is unwound for the supply of warp yarns to the loom, and by the simultaneous movement or transfer of the warp yarn transfer elements, such as e.g. upper and lower saw teeth kh. Of course, the upper warp yarns 9 ° are transported in one direction and the lower warp yarns 92 in the opposite direction. The parallel arrangement of the warp yarns is thus maintained during the transfer movement. Furthermore, and at the same time with this, warp yarns are arranged at the extremities of the warp yarn groups, which are arranged one above the other in the flat sleeve-like shape on the tree and in the lower and upper warp yarn rows in the loom, alternatively from whether it is the upper part to the bottom or from the bottom to the upper part at each Warp yarn transfer movement is generally the distance of the transverse or transfer movement from the warp yarn distance in the weave . and the character of the bond itself.

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Intermittently are through upper and lower strands or Websäjile or weaving fans of various warp yarn runs also help (with some or all of the top chains pushed down and some or all of the bottom chains pushed up are pressed) and weft threads entered therein are formed.

After the transverse transport, each upper chain cuts a lower chain (as you can see in the top view). The shed is then formed and the weft thread is introduced behind (opposite the fur line on the feed side of these cut or node points) these cut or node points. A group of shutters or bats 5 ^ (the upper or lower depending on the step of the weaving cycle) is then inserted between adjacent warp threads and moved against the fur line $ 0 in order to compact the warp thread intersections flush and into the woven fabric ^ Z more stable three-axis To turn up his figure.

As described above, the pitch angle of the warp yarns in beam 38 corresponds to the angle of the warp yarns in the finished one triaxial woven fabric and is around 30 for most triaxial fabrics, depending on the winding path of the warp thread in the fabric a slight deviation is possible after the threads for optimal mechanical Properties are "compacted flush". In addition, the distance between the warp yarns in the flat

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sleeve-shaped shape of the tree 38 the distance between the warp yarns in the finished fabric 52, and the unit length of the flat sleeve-like shape of the warp yarns in the tree also corresponds to the unit length of the warp yarns in the fabric 52. For the purpose of the invention, the unit length becomes defined as the length of the flat tube as well as the length of the fabric in which a single warp yarn is either wanders around the sleeve circumference, returning to its original position, or from its one Edge, as in the fabric, migrates to its other edge back to the first edge.

For the weaving of a special three-axis fabric, of course, the three-axis warp beam according to the invention must maintain a preselected and constant unit length over its total length. In the inventive Rearing operation, a plurality of warp yarns is generally wound around a central spool, which is usually, but is not necessarily cylindrical.

An alternative rearing device to that described above is shown schematically in FIGS. In particular, mounted on a fixed gate 60 are a plurality of warp yarn supply packages 62, two of which are shown in each view. Warp yarn paths 6h form a closed tubular arrangement around the warp yarn path center line when they move away from the warp

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yarn feed packs 02 by a yarn path length comp «. sierende guide 66, flat sleeve configuration forming guides extend 68 and 70 ^{to the} beam mounting means 72, whereby they are pulled from the surface of drive roller Jk, which in turn is driven by a motor 7 6 and is pressed into engagement with warp yarns by an unillustrated device, wherein the warp yarns of a receiving device 72 can be received. Together with the surface drive roller 7k and the motor 76, the receiving device 72 and the guides 66 and 68 are mounted on an elongated support body 78, which in turn is rotatably supported in a sleeve 80 and is connected to a second motor 82 therethrough. The inner guide 70 is supported on a cantilever arm 70a which is rotated as a unit with the support bodies 78.

In operation of the apparatus shown in Figures 9 and 10, the motor Jk and surface drive roller take up warp yarns fed from warp yarn packages 62 and helically or spirally wrap them around the tree take-up device 72 in a flat sleeve configuration formed by guides 68 and 70 while the motor 82 the entire arrangement of the tree take-up device 72, surface drive roller Jk, M ± or 76, support body 78 and guides 66 and 68 relative to the creel 60 and the warp yarn supply packages 62 with predetermined-

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ter, proportional to the recording rate of the recording device 72 Speed can rotate. Thus, a helix angle becomes the warp yarns, which are in a flat sleeve-like Arrangement according to the invention also of the receiving device 72 are included.

In general, guides 66 , 68 and 70 correspond to guides 18, 19 and Jk in the apparatus shown in FIG.

Obviously, other devices can also be used are to put the warp yarns together in a flat sleeve Arrangement for receiving from the receiving device to form in the rearing device according to the invention. For example, individual movable guides for each Warp yarn arranged in an elongated oval path -and carried around this path, which corresponds to the circumference of the Corresponds to flat sleeve-like arrangement of the warp yarns in front of the recording, namely by means of a fastening Chain tooth elements or in a kind of driveway device. Thus, an articulated chain can be attached and driven in a suitable manner in an elongated elliptical path which is supported by a body at the rear of the gate 10 in the device of FIG and goes through the center of the tubular arrangement of the warp yarns, carrying a multitude of small zo.pf guides, in order to effectively attach each warp yarn in the flat sleeve-like arrangement in front of the tree pick-up to

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effectively the movement or migration of each warp yarn in and around the flat-sleeved assembly to arrange and control the warp yarns.

The invention is also directed to a warp beam for weaving, consisting of a plurality of generally parallel yarn runs that are helical on are self-wound, and is characterized in that the yarn runs a flattened sleeve (21) form that is helically wound on itself wherein the yarn runs are arranged in helical paths with respect to the longitudinal axis of the tube.

The improved warp beam is further characterized in that the flattened sleeve over its entire length has a predetermined constant unit length consisting of the length of the flattened sleeve, in which each thread run makes a complete pass around the circumference of the tube and into its original one Position returns.

It is also useful if, in the case of the improved warp beam, the flattened sleeve is attached to a cylindrical bobbin the middle of which is wound. Furthermore, it is useful according to the invention for the improved warp beam if the spiral or helically wound flattened sleeve

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at its outer longitudinal end on a retaining device (36) is attached to keep all the thread runs of the tube in their appropriate position to each other and to transport of the yarn runs to a three-axis loom warp feed system is able to enable. It is favorable according to the invention furthermore, if the paths of the warp beam have an angle of inclination (O ^) of about 30.

While this invention is presented here in terms of particular embodiments is described and shown for the purpose of simplification in terms of warp beams and weaving device, who use relatively limited warp yarn counts understands it is apparent that the invention can be used in a variety of other embodiments, particularly in more complicated devices with larger numbers of warp yarn runs in the tree.

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Claims (1)

Claims Method for forming a warp beam for weaving, characterized in that a plurality of warp yarns is fed, which are arranged in paths (16) which together form a closed tubular arrangement form and are arranged around a warp yarn center line, the feed to a warp beam receptacle (20) takes place, in which the warp yarns are helically wound on themselves, the warp yarn paths like this are led (18, 19) »that they are immediately before the Form recording a flat sleeve-like arrangement, and a gate and the receiving device are rotated relative to one another about the warp yarn path center line. 2. The method according to claim 1, characterized in that the receiving device at a speed which is proportional to the speed at which the gate and the receptacle are relatively are rotated with respect to each other, winds warp yarns fed to the receiving device. 3. The method according to claim 1 or 2, in particular for weaving a triaxial fabric, wherein warp yarns one three-axis fabric loom evenly distributed in upper and lower, generally parallel, level rows (90 » 509811/0797 " ²³ " 92) are fed, with individual warp yarns in the loom for movement from one edge of each row to the other Edge of the same are caused to be transported to the corresponding edge of the other row and moved to the opposite edge thereof and then transported back to the first row while thread fans are intermittently formed from the warp yarns and weft threads are inserted therein, with the movement and transmission are intermittent and synchronous with the fan formation and shot input, the motions for formation of a triaxial fabric are suitable, and the speed of movement of the warp yarns is such that each warp yarn make a complete pass of both even rows of warp yarns in a unit length of fabric, thereby characterized in that the warp yarns from a three-axis warp beam (38) woven from a flattened sleeve Warp yarn is fed, the tube is helically wound on itself and the warp yarn generally follow parallel screw paths along the length of the sleeve. H. Method according to claim 3t, characterized in that the unwinding of the helically wound sleeve is coordinated with the transverse movement of the warp yarns on the loom in the flat rows in such a way that each individual warp yarn simultaneously reaches the edge of a flat row and at the same time - Zk - 509811/0797 - 2k - another row when it reaches the edge of the flattened sleeve and the direction of its transverse movement reverses on its flattened helical path in the sleeve. Device for carrying out the method according to one or more of the preceding claims, in particular for forming a warp beam, with a gate device (1O) for fastening a large number of warp yarn feed packs, from which warp yarns can be picked up in ways e ± ixrlch.txixig (20) for receiving and winding warp yarns about an axis from the warp yarn supply packages, characterized in that the packages (12) and warp yarn paths (16) extend around a line between the creel (10) and the take-up means (20) and generally parallel to these are arranged, a retaining device (22) for the warp yarns is provided on the receiving device (20) in positions relative to one another which are determined by the path of the corresponding warp yarns approaching the receiving devices, the paths form a flattened sleeve which is symmetrical about a parallel to the axis lying plane are arranged, and a drive device (30, 32, 10) for di e rotational movement of the gate device (1O) and the receiving device (20) is provided around the warp yarn path center line. - 25 - 509811/0797 6o device according to claim 5 »characterized in that that a speed control device (28) for Maintaining a preselected proportional ratio between the speeds of the relative Rotary movement and the receiving device is provided. 7. Apparatus according to claim 6, characterized in that a guide device (18, 1 ° -) is provided along the warp yarn paths between the yarn packages and the receiving device so that the paths approaching the receiving device are changed and the warp yarns or warp threads in the Because together form a flat sleeve assembly. 8. Apparatus according to claim 7, characterized in that that another guide device (3 ^) along some Warp yarn paths between the bobbins and the receiving device is arranged such that the total length of the Warp yarn is made equal in length in each way in all other ways. 9. Apparatus according to claim 8, characterized in that the gate (10) is rotatable about the Kettgarnwegmittellinie . . ■■ ._. "26- 509811/079 7 10. Apparatus according to claim 8, characterized in that da3 the receiving device (72) around the warp yarn path center line is rotatable. 509811/079 7 Blank page