WO2006131360A1

WO2006131360A1 - Spiraling machine and yarn feeding method for said machine

Info

Publication number: WO2006131360A1
Application number: PCT/EP2006/005483
Authority: WO
Inventors: Harry Lucas
Original assignee: Maschinenfabrik Harry Lucas Gmbh & Co. Kg
Priority date: 2005-06-09
Filing date: 2006-06-08
Publication date: 2006-12-14
Also published as: DE102005026464B4; DE102005026464A1; EP1902166A1

Abstract

The invention relates to a spiraling machine (1) wherein the yarn (3) is fed to an inner tube (2) via frictional feeders (14). These feeders are operated in such a manner that their yarn feedwheels (16) rotate at a speed that is far above the speed required for a slipless conveyance, thereby relaxing the yarn wound around the yarn feedwheel (16) so that it rests only loosely against it. The invention provides a self-regulating system that keeps the yarn tension between the feeder device (14) and the point of yarn consumption, i.e., the inner tube (2), within limits, for example between 20g and 70g. The inventive spiraling machine also adapts itself to different inner tube diameters without any adjustment from the exterior.

Description

Spiraling machine and method for yarn feeding in such

The invention relates to a Spiralisiermaschine for winding an elongated object, such as a hose, with a thread, wire or the like

Structure.

Rubber hoses, plastic hoses and the like, as used in automotive engineering or for other purposes, often have a so-called

Tissue insert on. This gives the hose compressive strength and dimensional stability.

DE 198 57 512 A1 discloses a method for producing such hoses. In this case, a hose core is first extruded with a die, in the a mandrel extends into it. The core surrounding the mandrel is then wrapped with filament yarns, which are thereby withdrawn from supply spools. The supply reels must be arranged on a rotatably mounted relative to the forming die and the mandrel carrier.

The thread tension results from the working speed and the force required to pull the threads from the supply spools. If the soul is wrapped, an outer hose cover is applied. For this purpose, the wrapped core passes through an annular extrusion die. The inner mandrel must extend from the die to the annular extrusion die provided to apply the liner to produce hoses having a defined inner diameter. This leads in practice to mandrel lengths of up to 100 m, which represents a significant technological problem.

US Pat. No. 5,309,738 discloses a spiraling machine for applying threads to a hose. The threads are supplied by positive feeders who sit on a concentric to the tube rotating ring carrier. Each feeder has a yarn feed wheel that is wrapped several times by the yarn to be delivered and thus delivers the yarn substantially slipless. A fixedly arranged drive device drives the Fournisseure sitting on the ring carrier via a belt and thus determines the length of thread wound on the hose. This can build up considerable thread tensions between the hose and the feeders, which can lead to tearing of the threads in extreme cases. However, even if the threads do not tear, too high a thread tension leads to a more or less large constriction of the tube, so that this is no longer exactly true to size.

On this basis, it is an object of the invention to provide a device and a method for winding elongated objects with a thread, wire or similar structures, in particular a machine and a method for producing reinforced hose, with which the hose with simple means process reliability and can be made dimensionally stable.

This object is achieved with the spiraling machine according to claim 1 and with the method according to claim 17:

The spiraling machine according to the invention has a support through whose central opening the object to be wound, for example a hose, is guided. The carrier rotates to an axis concentric with the tube while the tube does not rotate but moves only axially. At least one sits on the carrier

Conveyor, which is designed as a slip conveyor and as such is adapted to convey the thread, the wire or similar structure with slip to the central opening. This means that ultimately only thread to the current through the central opening

Object is promoted when the object actually pulls the thread off as well. Furthermore, this means that the thread, the wire or similar structure is provided in each of the object required amount, regardless of the diameter and / or the feed rates ^* speed of the respective object. So can easily without changing the Spiralisiermaschine different thicknesses hoses with thread, wire or the like Material to be wound. In practice, this means a substantial relief, because the device and conversion of the machine when changing to different hose diameters is not required. Also, the production of a dimensionally stable hose is possible without the use of a mandrel. It becomes possible to wind (or knit or braid) a tube core in a section with thread that is not supported inwardly but is hollow and free. The hose diameter is also not affected by fluctuations in the yarn tension or the feed rate of the hose core, which can lead to changes in the pitch angle of the individual turns on the hose core and thus to changes in the winding length.

While the spiraling machine is intended primarily to wrap the hose core with threads lying on helical lines, it can also be developed in such a way that the threads are knitted or intertwined with one another. This can be done in or at the

Central opening of the circulating support a knitting device is arranged. Again, the carrier runs with all conveyors and their drive (s) to the hose core, while this does not rotate but only receives axial feed. Furthermore, it is possible to braid the hose core with thread. For this purpose, the conveyors, their drives and the respective yarn package can also be mounted on sub-carriers, which are guided on the rotating carrier circling each other. Again, it is not necessary to use the hose core in the mandrel

Support the thread application area inwards.

The conveyor provides in a sense a tension-controlled thread feed. If the thread tension between the object to be wound and the conveying device is missing, the conveying action of the conveying device is also reduced, so that no more thread is conveyed. In such a case, the thread is loosely around the yarn feed wheel without being really driven by this. However, if the object takes off thread, the windings surrounding the yarn feed wheel are tightened on the yarn feed wheel, whereby the conveying effect occurs in the respectively required degree. Similarly, so-called plucked be compensated. Such occur when the thread adheres to the supply spool. In this case, the turns of the thread tighten on the yarn feed wheel, so that this applies the increased conveying force. However, between the conveyor and the hose, no increased thread tension occurs. In this way, it is possible with a simple conveyor, which is designed for example as Friktionsfördereinrichtung to keep the thread tension between the hose (or other object) and the conveyor, for example, between 10g and 70g constant.

In a preferred embodiment, the conveying device has a drive motor or is connected to a drive motor, which in turn is held on the carrier. The power supply to the drive motor can be done via a slip ring assembly. Alternatively, rotary transformers or the like may be used.

The drive motor preferably drives a plurality of conveyor dereinrichtungen ^v synchronously. It preferably gives the yarn feed wheels a speed which is greater, preferably substantially greater, than a synchronous rotating speed. number that would be at least necessary for the delivery of the thread. The synchronous speed is calculated from the required yarn speed divided by the Lieferradumfang. In a preferred embodiment, the speed of the yarn feed wheel is much higher than the synchronous speed, ie, 20% to 40% above it.

The drive motor is preferably connected to the conveyors via a transmission means, for. B. in the form of a rotating belt connected. Preferably, the belt is driven against the direction of rotation of the carrier. This minimizes centrifugal forces acting on the belt and thus increases operational reliability.

The conveyor is, as mentioned, preferably designed as a slip or friction conveyor. For this purpose, at least one, preferably several Fadenabhebeelemente are assigned to the yarn feed wheel, over which the yarn feeding the wheel wrapped coils are guided. In this case, each turn is preferably guided over the at least one Fadenabhebeelement. As a result, there is no winding over the entire length of the yarn feed wheel. If the thread is not tightened by the thread take-off point formed by the tube, the turns loosely surround the thread delivery wheel without being substantially conveyed.

A yarn brake is preferably arranged between the conveying device and the thread take-off station. This usually contains at least one, preferably at least two deflection elements, for example in the form of cyclic lindrischer pins around which the thread must run. The thread brake can be used to set a minimum thread tension, with which the thread is wound on the hose or the other object.

Between the conveying device and the supply reel, the thread is preferably guided without braking. On the way between the conveyor and the supply reel then only thread guide elements are arranged.

The spiraling machine can be used to convey threads provided with a sticky coating, a so-called dip, to the tube or other object. The tacky coating temporarily fixes the turns wound on the tube so that they do not slip until, in a further process step, an outer cover is applied, for example sprayed or extruded, onto the wrapped tube.

Further details of advantageous embodiments of the invention will become apparent from the drawings of the accompanying description or claims.

In the drawing, an embodiment of the

Invention illustrated. Show it:

1 is a spiraling machine in a fragmentary schematic perspective view,

Fig. 2, the Spiralisiermaschine of FIG. 1 in a fragmentary schematic View showing only one conveyor,

Fig. 3, the Spiralisiermaschine of FIG. 1 in a fragmentary schematic

Vertical section view

4 shows the conveying device of the spiraling machine according to FIGS. 1, 2 and 3 in the conveying state in a schematic representation and FIG

Fig. 5, the conveyor of FIG. 4 in a non-promotional operating condition.

In Fig. 1, a Spiralisiermaschine 1 is illustrated which serves to wind a hose core 2 or other elongated object with thread 3. The thread 3 is wound on the inner tube 2 in helices. The corresponding turns 4 run with the same, for example negative slope. The spiraling machine can have a further identically structured step, which winds up further threads with a positive pitch direction, so that the threads wound up in the two steps lie on the tube core 2 in a cross-over manner. Fig. 1 illustrates that stage of the Spiralisiermaschine in which the threads are wound left-handed.

The relevant stage of the Spiralisiermaschine has a carrier 5 with a central opening 6, through which the hose core 2 is guided. To the carrier 5 includes an upper ring carrier 7, which is connected via columns 8, 9, 10 with a lower ring carrier 11. The upper and lower ring carriers 7, 11 form a rigid unit which is rotatably mounted and rotates in operation in the direction of the arrow 12. The ^' required for guiding the carrier 5 storage device is not further illustrated. A drive device 13, which is provided to enable the carrier 5 in rotation, is illustrated only symbolically in FIG. It can be formed by an electric motor, which is connected by suitable transmission means, such as belts or gears, with the carrier 5.

At the upper ring carrier 7 conveyors 14 are held, which are substantially equal to each other are formed. Each conveyor 14 has a rotatably mounted shaft which carries at its upper end a pulley 15 and at its lower end a yarn feed wheel 16. For supporting the shaft, a holder 17, which extends radially from the ring carrier 7 away. It preferably holds the shaft parallel to the axis of rotation of the carrier 5, for example in vertical alignment. If necessary, however, the waves of the conveyors 14 may also be otherwise oriented.

The conveyors 14 are connected by a gear means, for example in the form of a revolving belt 18, to a drive motor 19 mounted on the support 5, e.g. on the upper ring carrier 7, sits. The drive motor 19 drives on the belt 18 more, preferably all conveyors 14 together. Alternatively, a plurality of drive motors 19 may be provided, each driving only a few conveyors 14. It is also possible to assign each conveyor 14 a separate drive motor. The orientation of the waves of the individual conveyors 14 can then be set arbitrarily.

The lower ring carrier 7 carries supply spools 20 wherein each conveyor 14 is associated with a supply spool 20. From the supply spool 20, the threads 3 pass through the conveyors 14 to the central opening 6, where they are wound around the inner tube 2.

For clarity, reference is made to Fig. 2, ^{v shows} the ring carrier 7 in a view from below and a single conveyor 14 representative of all others. Between the conveyor 14 and the Central opening 6, as can be seen, a yarn brake 21 is arranged. This can in the simplest case, as shown, consist of two pins 22, 23, which are arranged at a distance parallel to each other and transverse to the thread 3. They are fixed for the thread 3 deflection, so that the thread 3 is braked at the pins 22, 23.

From FIG. 2 and supplemented FIG. 3, the structure of the thread conveying device 14 also basically emerges. This is designed in the manner of a Friktionsfournisseurs. In the vicinity of the yarn feed wheel 16, i. at a radial distance to this, Fadenabhebeelemente 24, 25 in the form of Fadenabhebeösen 26, 27 are arranged. The Fadenabhebeösen 26, 27 each z. B. two (or more) thread guide openings, which may be provided with ceramic liners. The two Fadenabhebeösen 26, 27 diametrically opposite sides of the yarn feed wheel 16 are arranged at approximately equal intervals to this. Alternatively, three such Fadenabhebeelemente 24, 25 may be arranged in uniform or different angle sections around the yarn feed wheel 16 around.

As is apparent from Fig. 3 further, between the

Conveyor 14 and the supply reel 20 may be arranged a rotatably mounted Fadenumlenkrolle 28 having a deep yarn guide groove and high lateral edges to guide the running around the supply reel 20 thread securely on the yarn feed wheel 16. The thread ^'•• deflection roller 28 is preferably formed of ceramic. However, between the conveyor 14 and the supply reel 20, at least in the preferred embodiment, form, no thread brake or the like threadline preventing device and preferably also no further thread guide means arranged.

The thread 3 passes over the thread deflection roller 28 to the yarn feed wheel 16 and wraps around this in the present embodiment, two times. The two (single) windings formed thereby pass through the thread take-off eyelets 26, 27, so that each turn is lifted twice from the thread feed wheel 16. Alternatively, fewer or more turns can be provided, which are each lifted at one, two or three points of the yarn feed wheel 16, however, the present embodiment has proven to be useful for many applications. The individual turns thus each touch the circumference of the yarn delivery wheel 16 twice over an angle of about 90 °, but in any case less than 180 °. The yarn feed wheel 16 is, as shown, preferably designed as a rod cage, i. its thread support surface is formed by many spaced parallel to each other and parallel to the axis of rotation oriented thread support pins 29.

The spiraling machine 1 described so far operates as follows:

The hose core 2 is guided in operation in FIGS. 1 and 3 from bottom to top, as indicated by an arrow 30. At the same time, the carrier 5 rotates at a corresponding speed of, for example, up to 700 revolutions / min. The hose core 2 is hollow. It is not supported from the inside, ie there is no mandrel or other support means extending through the same through.

The support 5 accordingly rotates in the direction of the arrow 12 at a speed which corresponds to the feed speed of the hose core 2. At the same time seated on the upper ring carrier 7 drive motor 19 is driven so that the individual yarn feed wheels 16 of the conveyors 14 run at a speed which is substantially greater than the synchronous speed. The synchronous rotational speed is that rotational speed of the yarn delivery wheel 16 in which the recirculated circumferential travel of the yarn delivery wheel 16 corresponds to the yarn length to be wound onto the hose core 2 in the same time. Due to the increased speed of the yarn delivery wheel, which is about 40% above the synchronous speed, and by the action of Fadenabhebeelemente 24, 25 of the supply reel 20 coming yarn is promoted only insofar as it is removed from the hose core 2. This effect is illustrated in Figs. 4 and 5. Fig. 4 shows a state in which the yarn 3 is wound around the inner tube 2, but relatively difficult to run from the supply spool 20. Between the supply reel 20 and the yarn feed wheel 16 there is a relatively high yarn tension. As a result, the turns of the thread 3 lie relatively firmly against the bars 29. As a result, the

Frictional engagement and the rotating yarn feed wheel 16 thereby promotes the turns to the hose core 2. The thread is relieved downstream of the yarn feed wheel 16 - the yarn tension is relatively low.

If the thread tension has decreased before and / or after the thread delivery wheel 16, the thread, as shown symbolically in FIG. 5, lies only loosely on the thread delivery wheel 16 and its bars 29 at. Thus, the conveying action of the yarn feed wheel 16 becomes smaller. If it is too low, the yarn delivery decreases so far that the yarn tension tends to increase again. In this way, the conveyor 14 with fixed Fadenabhebeelementen 24, 25 with respect to different thread decreases on the part of the hose core 2 has a balancing effect by tending to keep the thread tension between the yarn feed wheel 16 and the hose core 2 constant.

Similarly, the conveyor 14 compensates for yarn tension fluctuations at the yarn inlet side. If the voltage of the thread arriving from the supply reel 20 fluctuates, it compensates for this. If, for example, the thread tension increases relatively quickly because the thread 3, which is provided with a sticky substance (dip), hangs on the supply reel, the thread turns, as illustrated in FIG. 4, tighten so that the conveying effect of the yarn feed wheel 16 increases. The thread 3 is thus further promoted evenly. On the other hand, if the tension on the inlet side of the yarn feed wheel 16 decreases again, the pulling action of the yarn feed wheel 16 also decreases because the windings again lie relatively loosely on the yarn feed wheel 16.

The compensation effect of the friction distributor is in the specified configuration with high rotational speed lying above the synchronous rotational speed and with two windings and four take-off points so great that without adjustments to the conveyors 14,

Schlauchseelen 2 can be wound with very different diameters. The thread tension is independent of the running speed of the thread (ie the Speed at which the thread is removed) so constant that the wound Schlauchseeie 2 has a very narrow tolerated diameter. On a mandrel inside the hose core 2 can be completely dispensed with.

According to the invention, in a spiraling machine 1, the thread 3, which is preferably coated with a sticky dip, is fed to a hose core 2 by means of a slip-conveying device 14. This is operated so that their yarn feed wheel 16 runs at a speed that is (very) far above the speed that would be required for slip-free conveying per se. As a result, the thread windings lying around the yarn feed wheel 16 are relaxed so that they lie only loosely around the yarn feed wheel. As a result, a self-regulating system is created which increases the tension between the conveyor 14 and the yarn consumption point, i. the hose core 2, within limits, for example, between 20g and 70g keeps constant. In addition, this Spiralisiermaschine adapted without adjustment measures to different tube diameter.

Claims

Claims:

1. Spiralizing machine (1) for winding an elongate object (2) with a thread (3), wire or similar structure, in particular for winding a tube,

a carrier (5) having a central opening (6) through which the elongate object (2) passes, and which is rotatably supported relative to a rotation axis which is oriented axially with respect to the elongated object (2),

with a drive device (13) which is connected to the carrier (5) in order to rotate it about the axis of rotation,

with at least one conveyor (14) attached to the carrier (5) and adapted to convey the thread (3), wire or the like with slippage to the central opening (6).

2. Spiralizing machine according to claim 1, characterized in that the conveying device (14) has a thread impeller, which is connected to a drive motor (19) which is held on the carrier (5).

3. Spiralizing machine according to claim 2, characterized in that the drive motor (19) is connected via a slip ring arrangement with a power supply device.

4. Spiralizing machine according to claim 2, characterized characterized in that the drive motor (19) gives the yarn feed wheels (16) a speed which is greater than a synchronous speed which is at least necessary for the delivery of the yarn (3).

5. spiraling machine according to claim 4, characterized in that the speed is at least 10%, preferably 20% and in the further preferred case 40% above the synchronous speed.

6. spiraling machine according to claim 2, characterized in that the drive motor (19) via a transmission means with a plurality of conveyors (14) is connected.

7. Spiralizing machine according to claim 6, characterized in that the gear means is a belt (18).

8. Spiralizing machine according to claim 7, characterized in that the belt (18) is driven counter to the direction of rotation of the carrier (5).

9. Spiralizing machine according to claim 2, characterized in that the Fadenlieferrad (16) is associated with at least one Fadenabhebeelement (24), via which a Fadenlieferrad (16) looping around the thread (3), wire or similar structure is performed.

10. spiraling machine according to claim 2, characterized in that each of the yarn feed wheel (16) looping about at least one Fadenabhe- Beelement (24) is guided.

11. Spiralizing machine according to claim 2, characterized in that each of the yarn feed wheel (16) looping loop over at least two Fadenabhebeelemente (24, 25) is guided.

12. Spiralizing machine according to claim 1, characterized in that a yarn brake (21) is arranged between the yarn conveying device (14) and the central opening (6).

13. Spiralizing machine according to claim 11, characterized in that the thread brake (21) has at least one deflecting element (22).

14. Spiraling machine according to claim 12, characterized in that the thread brake (21) has at least two deflecting elements (22, 23).

15. Spiralizing machine according to claim 1, characterized in that on the carrier (5) a supply reel (20) is arranged, from which the thread (3) to the conveyor (14) is guided.

16. spiraling machine according to claim 14, characterized in that the thread (3), the wire or similar structure between the supply reel (20) and the conveyor (14) is guided unrestrained.

17. A method for winding an elongate object, in particular a hose or a hose core (2) with a thread (3), a wire or a similar structure, wherein in the method the thread (3), the wire or similar structure is supplied to the tube or hose core (2) at a substantially constant tension.

18. The method according to claim 17, characterized in that the thread (3), wire or similar structure of a drive means (14) is given a driving force acting in the conveying direction, which is dependent on the decrease speed with which the hose or the hose core (2) picking up the thread (3), wire or similar structure.

19. The method according to claim 17, characterized in that the thread (3) carries a sticky coating.