WO2008098587A1

WO2008098587A1 - Twisting method and bobbin

Info

Publication number: WO2008098587A1
Application number: PCT/EP2007/001259
Authority: WO
Inventors: Jean-Claude Allemann
Original assignee: SSM Schärer Schweiter Mettler AG
Priority date: 2007-02-14
Filing date: 2007-02-14
Publication date: 2008-08-21
Also published as: PT2118348E; ES2349618T3; DE502007004611D1; EP2118348B1; CN101605933A; EP2118348A1; ATE475730T1

Abstract

The invention provides a method for creating twisted yarn by means of a two-for-one yarn twisting machine, wherein the yarns (3) are unwound in their grain through a yarn infeed tube (22) and a hollow spindle (24) from a multiple-wound feed spool (5) on which a plurality of yarns (3) extending substantially parallel to each other are wound, and are wound onto a winding bobbin (10) as twisted yarn. According to the invention, the grain of the yarns (3) extends from the release point of the yarns (3) on the feed spool (5) directly toward the yarn infeed opening (23) of the yarn infeed tube (22), wherein the yarns (3) form a conical spool shape on the feed spool (5) in at least one region (11-15) of the spool length of the feed spool (5).

Description

Twisting method and yarn package

The invention relates to a method for producing twine (twisting method) by means of a double-twisting machine, wherein the yarns are wound in their threadline through a thread inlet tube of a hollow spindle and as a twisted yarn from a multiply feed pile on which several substantially parallel yarns are wound are wound on a take-up spool and a yarn package for use as a supply spool in the process.

When creating twine (twisting process) by means of a double twisting machine multiply folded yarn packages are used as supply bobbins. In such multi-ply bobbins at least two yarns lying parallel, so with a parallel winding wound on a cylindrical usually cross-wound bobbin. The yarns are therefore not twisted or spun together. However, the individual yarns may already be twines, ie the individual yarns may already consist of two or more yarns twisted together. In the latter case, so-called multi-stage threads are produced by the twisting process. The yarns may be made of synthetic fibers and / or natural fibers. The supply bobbin is inserted into a twisting pot of a double twisting spindle of the double twisting machine and is withdrawn from there in an overhead deduction process, whereupon the twisted yarn produced by twisting the yarns wound on the supply bobbin is wound on a take-up bobbin. The double twisting spindle has a thread inlet tube with a thread inlet opening and a hollow spindle, wherein the hollow spindle merges at its Fadeneinlauföffnungsfernen end into a storage disk. The hollow spindle is rotatably mounted together with the storage disk and rotates during the twisting process, driven by a spindle bank acting on the longitudinal axis of the hollow spindle. The feed bobbin itself rests during the twisting process, ie the feed bobbin itself does not rotate. The yarn inlet tube and the hollow spindle are performed along the coil axis of the supply spool by this. In order to produce the twists necessary for twisting the yarns, or the yarns of the yarns, the parallel wound yarns are simultaneously unwound from the supply spool in a yarn path. In this threadline, the yarns are first parallel over a freely rotating around the thread inlet tube wings (twisting wings), which is also referred to as Campanello, and then run into the thread inlet opening of the thread inlet pipe. The twisting wing is driven by the movement of the separation point of the yarns from the supply spool. The yarns are performed after passing through the thread inlet tube through the hollow spindle and wrapped around the storage disc. The yarns, or their threads, receive a first rotation in the hollow spindle and a further rotation by the rotation of the storage disk. From the storage disk, the yarns of the yarns are guided outside along the twist pot to a thread guide arranged on the extension of the reel axis above the twist pot. The twisting pot prevents contact of the threads of the yarns running in the yarn path after the storage disk with the supply spool, which would lead to a disruption of the withdrawal of the yarns. The Zwirntopf is therefore also called a protective pot. The twisting wing also has a protective function. It prevents the threads of the yarns between the separation point on the surface of the supply spool and the running into the yarn inlet opening of the yarn inlet pipe rub against the surface of the supply spool. This friction would result in frequent yarn breaks. The twisting wing therefore extends radially slightly beyond the maximum possible diameter of the feed bobbin. The twisting wing thereby limits the full utilization of the volume of the protective pot. The maximum possible height of the supply bobbin is limited by the position of attachment of the twisting blade on the thread inlet tube and the maximum diameter of the supply bobbin by the radial length of the twisting blade. The latter means that the twisting process must be interrupted relatively often by replacing the spool fed out, which not only reduces the efficiency of the twisting process, but also reduces the quality of the produced twisted yarn, since the twisted package has a relatively small yarn length and / or at larger yarn lengths relatively frequent splices or links of the ends of the spun yarns with the yarns of the new feed bobbins are present.

The invention has for its object to provide a method for producing twine and a yarn package, which avoid the disadvantages of the prior art, in particular, the volume in the protective pot of the double twisting spindle is better utilized to increase the efficiency of the twisting.

This object is achieved by the method and the devices of the independent claims. The dependent claims represent preferred embodiments of the invention.

In a method according to the invention for producing twine by means of a double-twisting machine, a multiply fed feed bobbin, on the several substantially parallel to each other running yarns, for example, even twines are wound, the yarns in their threadline through a thread inlet tube of a hollow spindle, as usual in the prior art in double twisting machines, deducted overhead and as a twist, ie as a twisted Garbne , wound up on a casserole.

According to the invention, the yarn path of the yarn runs from the separation point of the yarns on the supply bobbin directly to the yarn inlet opening of the yarn inlet pipe. So there is no circumferential twisting wing provided. In this case, the yarns form a conical coil shape on the supply spool in at least one region of the spool length of the supply spool. This region of the coil length thus extends in the direction of the axial length of the supply spool such that the supply spool is wider at the distal end of the supply spool, i. has a larger diameter than the near-tail top of the feed bobbin. The conical coil shape is given by the nature of their winding of the yarns on the feed bobbin. The areas of the coil length with a conical coil shape have a frustoconical surface on which the separation point of the yarn moves up and down in the supply coil axis direction. The frusto-conical surface may also be formed only within the supply spool, i. whose coil structure can be chosen so that the truncated cone-like surface is formed only when pulling off the top of the supply bobbin.

Characterized in that the frustoconical surface is angled in the direction of the yarn path between the detachment point and the thread inlet opening, the friction between the yarns and the feed bobbin surface is reduced or completely avoided at a correspondingly flat opening angle of the conical surface. It will be such the thread breaks that make it necessary to use a twisting wing when pulling off cylindrical coils in double twisting machines, avoided. The geometrical limitations of the supply spool due to the length and the position of the twisting blade are thus canceled. The amount of yarn processed per twist yarn per supply spool can thus be increased. The productivity of the twisting process and thus its efficiency is increased by the same percentage as the amount of yarn on the supply spool is increased relative to the amount of yarn on a supply spool in the presence of a twisting blade. As the amount of twisted yarn per supply spool is increased, the quality of the package also increases. When twisting several feed bobbins one behind the other and winding on the same package, the number of splices, ie the links of twisting ends, decreases per length of twist.

In a yarn package according to the invention, e.g. can be used as a supply spool in the process according to the invention, a plurality of substantially parallel yarns are wound on the yarn package, i. the yarn package is multiply stapled. By having the yarns on the

Garnspule form a conical coil shape in at least a portion along the coil length of the yarn package, the friction of the threads of the yarns when pulling overhead in a double twisting spindle at the current

Coil surface reduced in these areas. Yarn breaks can be avoided even without a twisting wing. The conical coil shape can also be formed only from an inner surface of yarn layers within the coil, so that the conical shape comes to light only during unwinding during the twisting process as the outer surface of the yarn package.

In a yarn package according to the invention, the conical coil shape is particularly preferably formed by the surface of at least one coil region wound up in the form of a cop. Thus, the yarn package has a composite winding, so that it is at least in some areas of the yarn package as Kötzer, also called one-sided bottle spool, pronounced. With such a coil shape, the individual coil regions are unwound one after the other as the yarn is pulled off the yarn package along the longitudinal axis of the coil, so that the threads of the yarns can only rub against the surface of the currently drawn off region. Next is characterized in that such cops are wound in parallel can increase the coil density compared to a conventional cross-winding, since the coil density increases with decreasing crossing angle. In parallel winding, the crossing angle is zero, so that the package density is maximized in this regard, which in turn maximizes the amount of yarn processed per supply package. When using such a yarn package as a supply spool for the inventive method, the efficiency of the twisting process is therefore further increased.

Making bobbin yarn packages, also called beaters, is well known in the art. Devices and methods for producing such yarn packages are disclosed, for example, in DE 198 28 436 A1 and DE 10 2995 035 259 A1. When producing a yarn package according to the invention, such processes can be applied analogously, wherein instead of just one yarn, i. only one thread, at least two yarns together, guided in parallel, wound up at the same time.

The wound in Kopsform coil area can follow in the axial direction of the coil length on a cylindrical coiled coil area, whereby, especially in parallel winding of the cylindrical portion, the volume of the protective pot can be used even better. The latter follows from the fact that in coils with composite winding, the outer coil surface has notches in relation to a cylindrical shape, since the cops are usually bulbous on their radially outer surface. In the lower, that is to say remote, coil region, with a sufficiently flat shape of the cylindrical wound coil region, there is only a small surface area at which the threads of the yarns that are currently drawn off can rub. It can therefore be optimally utilized in this area, the protective pot volume by a cylindrical outer shape of the coil. A double twisting spindle according to the invention is set up to carry out the method according to the invention. It has a protective pot, designed to receive a yarn package according to the invention, and a thread inlet tube of a hollow spindle for positioning on the longitudinal axis of the yarn package. There is provided a yarn path from a separation point of yarns on the yarn package to the yarn inlet opening of the yarn inlet tube. According to the invention, the yarn path of the yarn runs from the separation point of the yarns on the supply bobbin directly to the yarn inlet opening of the yarn inlet pipe. In this yarn path between the separation point of the yarns on the supply spool and yarn inlet opening of the yarn inlet tube so no circumferential wing, ie no twisting wings, provided as a thread guide. As a result, the volume of the protective pot can be fully utilized for receiving a supply spool.

The invention will be explained in more detail using an exemplary embodiment with reference to the drawings.

FIG. 1 shows a double-twisting spindle according to the invention.

FIG. 2 shows a multi-ply yarn package according to the invention.

The figures of the drawing show the subject matter according to the invention in a highly schematized manner and are not to be understood to scale. The individual components of the article according to the invention are shown so that their structure can be well shown.

FIG. 1 schematically shows a double-twisting spindle 1 according to the invention in a double-twisting machine, while the method according to the invention is carried out. The double-twisting spindle 1 is shown as a cross-sectional image. The yarns 3, which are shown only as a line except for the enlarged detail I shown, become of a yarn package according to the invention, which is arranged as a supply spool 5 in the double twisting spindle 1 according to the invention, deducted overhead. The yarns 3 are carried out by a yarn guide 7, which is arranged on the extension of the bobbin axis on the feed bobbin 5, to subsequently be fed via a deflection 8, for example a deflection roller or a deflection bolt, to a package 10 driven by a friction roller 9, where the yarns 3 are wound up as a finished thread. The yarns 3 form on the supply spool 5 in five areas 11-15 along the coil length of a conical coil shape. These areas 11-15 of the coil length extend in the direction of the axial length of the supply bobbin 5 such that the areas of the supply bobbin 5 are wider in the direction of the deduction distant foot end of the supply bobbin 5, ie have a larger diameter than in the direction of the near-discharge head end of the supply bobbin 5. The regions 11-15 of the coil length with a conical coil shape in each case have a kee I dull-like surface 20 on which the separation point of the yarns 3 moves up and down in the supply coil axis direction when pulling off overhead. As long as the yarn package 5 has not yet been unwound, these frusto-conical surfaces 20 are at least partially formed as inner surfaces within the bobbin. That is, these inner surfaces are formed by yarn layers within the yarn package. The individual regions 12-15 each form a so-called cop, ie the yarn package is designed as Kötzer. The double-twisting spindle 1 has a thread inlet tube 22 with a thread inlet opening 23 and a hollow spindle 24, which merges into a storage disk 25 at its end remote from the yarn thread opening. The hollow spindle 24 is rotatably mounted together with the storage disk 25, for example by means of ball bearings 27 between the hollow spindle 24 and a mandrel 29 for the bobbin 30 of the supply bobbin 5 and rotates during the twisting process, driven by a spindle bank acting on the longitudinal axis of the hollow spindle 24 30. The feed bobbin 5 is so on the hollow spindle 24, or the arbor 29, plugged that the longitudinal axes of the hollow spindle 24 and the thread inlet tube 22 coincide with the longitudinal axis of the supply spool 5 together. The supply bobbin 5 is arranged within a protective pot 33 of the double-twisting spindle 1, which in turn is arranged within a substantially cylindrical balloon limiter 35. Permanent magnets 37 on the fixed balloon limiter 35 and the protective pot 33 prevent the protective pot 33 and the supply bobbin 5 with the hollow spindle 24 and the storage disk 25 to rotate with. The yarn path on which the parallel wound yarns 3 of the supply bobbin 5 are guided during the twisting process, runs from the separation point of the yarns 3 on the feed bobbin 5 directly to the yarn inlet opening 23 of the yarn inlet tube 22, ie there is no twisting wings for guiding the yarns 3. The function of the twisting blade can be taken over by the special winding of the supply bobbin 5 according to the invention, ie since the separation point of the yarns 3 does not run on a cylinder surface of an entire supply bobbin or on the respective current surface during unwinding by the uncoiling process, the friction of the yarns 3 diminished on the currently current coil surface or the yarns 3 do not touch the surface. This allows undisturbed stripping of the yarns 3. Within the thread inlet tube 22, an inner thread tensioner 40 is provided which avoids contact of the threads of the yarns 3 with the inner surface of the hollow spindle 24 as far as possible, so that a disturbance of the twisting process is avoided. The guided in the hollow spindle 24 threads of the yarns 3 receive a first rotation in the hollow spindle 24. One revolution of the hollow spindle 24 results in the thread piece between Abiösepunkt on the supply spool 5 and the storage disk 25 a revolution in the thread. The threads of the yarns 3 emerging from the hollow spindle 24 wrap around the storage disk 25, the yarns being guided in a groove 42 on the outer edge of the storage disk 25. Due to the rotational movement of the storage disk 25, the threads of the yarns 3 to the casserole point, ie the point at which the threads between the Take-up spool 10 and the friction roller 9 are guided, another rotation. These rotations produce the twist of the yarns 3 to yarn. In the yarn path between the storage disk 25 and the yarn guide 7, the threads of the yarns 3 are guided between the protective pot 33 and the balloon limiter 25. The latter leads on the one hand to the fact that the threads in the said area of the threadline do not get confused with the areas of the threads between the detachment point and the thread inlet opening 23 of the thread inlet tube 22, on the other hand the balloon formed by the threads, ie the area, by the balloon limiter 35 which is taken by the rotational movement of the overhead withdrawn yarns 3, limited in its geometry, so that the current forming the balloon threads of the yarns 3 do not collide with other components of the double-twisting machine.

FIG. 2 shows a multiply-folded yarn package 5 according to the invention cut open, as used, for example, in FIG. 1 during the twisting process as a supply spool. On the yarn package 5, a plurality of substantially parallel yarns 3, that is wound in a plurality of sections, in a plurality of regions 11-15,50,51 along the package length of the yarn package 5 on a cylindrical sleeve 30. The multiple bin is shown in the figure by showing a double twine 55. The areas 11-15,50,51 arise when winding a yarn package in that they are wound up successively. That is, first, the lowermost region 50 is completely wound up, and thereafter the respective overlying region 11-15, 51. The shape of the individual regions 11-15, 50, 51 is created by guiding the yarn 3 during winding. At the farthest remote during the twisting process foot end of the supply spool, first a region 50 is provided with a flat cylindrical coil shape. This region 50 is initially followed by a conical coil region 11, which is referred to as a cop belly. This Kopsbauch 11 forms a basis for the subsequent, designed as a cops 12-15,51, four coil areas. These cops 12-15 have a conical coil shape. They each form one Cone out. Each Kops 12-15,51 forms a truncated cone-like surface 20 on which moves the separation point of the yarns 3 when pulling off in Spulenachsrichtung up and down. As long as the yarn package 5 has not yet been unwound, these frusto-conical surfaces 20 are at least partially formed as inner surfaces within the bobbin. That is, these inner surfaces 20 are formed by yarn layers within the yarn package 5. The individual cops 12-15, 51 may, for example, be wound in parallel, or have a cheese winding with the smallest possible crossing angle, ie the angle between yarn layers lying one above the other. The smaller the crossing angle, the higher the resulting package density. The crossing angle should be less than 10 degrees to achieve a high package density. Such Spulenbewicklung with cops and a Kopsbauch is also referred to as a composite winding or bottle spool. The angles formed between the truncated cone-like surfaces 20 of the cops 12-15, 51 and the longitudinal axis of the yarn package 5 are referred to as the composite angle α. In the illustrated case, the amounts of this composite angle α decrease from the topmost cop to the coping abutting the cop. The composite angle α of the topmost cop 51 is almost 90 degrees. The decrease in the composite angle amounts makes sense, since the included between the threads in the threadline between the detachment point and thread inlet opening of the thread inlet tube and the bobbin axis angle in the course of pulling the yarn from the yarn package 5 also decreases.

Proposed is a method for producing twine by means of a double-twisting machine, wherein the yarns 3 are withdrawn in their yarn path through a yarn inlet pipe 22 and a hollow spindle 24 of a multiply fed feed bobbin 5 on which a plurality of substantially parallel yarns 3 are wound be wound up as a twist on a package 10. According to the invention, the yarn path of the yarns 3 runs from the separation point of the yarns 3 on the supply spool 5 directly to

Thread inlet opening 23 of the thread inlet tube 22, wherein the yarns 3 on the

Origination coil 5 in at least one region 11-15 of the coil length of the supply spool 5 form a conical coil shape.

The invention is not limited to the embodiments given above. Rather, a number of variants are conceivable, which make use of the features of the invention even with fundamentally different type of execution.

Claims

claims

1. A method for producing twine by means of a double-twisting machine, wherein of a multiply fed supply spool (5), on the several in the

Mainly parallel to each other running yarns (3) are wound, the yarns (3) are withdrawn in their threadline through a thread inlet tube (22) and a hollow spindle (24) and wound as a twist on a package reel (10), characterized in that the Thread course of the yarns (3) from the separation point of the yarns (3) on the supply spool (5) directly to the yarn inlet opening (23) of the yarn inlet tube (22), wherein the yarns (3) on the supply spool (5) in at least one area (11 -15.51) of the coil length of the supply spool (5) form a conical coil shape.

2. yarn package for use as supply bobbin in the method according to claim 1, wherein on the yarn package (5) a plurality of substantially parallel yarns (3) are wound, characterized in that the yarns (3) on the yarn package (5) in at least a portion (11-15,51) of the coil length of the yarn package (5) form a conical coil shape.

3. yarn package according to claim 2, characterized in that the conical coil shape of the surface (20) of at least one coiled coil in coil form (12-15,51) is formed.

4. yarn package according to claim 3, characterized in that

P9079PCT the Spulenπbereich wound in Kopsform (12-15.51) in the axial direction of the coil length on a cylindrically wound coil region (50) follows.

5. double twisting spindle (1) for carrying out the method according to claim

1 with a protective pot (33) adapted to receive a yarn package (5) according to one of claims 2 to 4, and a yarn inlet pipe (22) of a hollow spindle (24) for positioning on the longitudinal axis of the yarn package (5), wherein a yarn path of a separation point of yarns (3) on the yarn package (5) to the yarn inlet opening (23) of

Yarn inlet pipe (22) is provided, characterized in that the yarn path of the yarns (3) from the separation point of the yarns (3) on the supply spool (5) directly to the yarn inlet opening (22) of the yarn inlet tube

(22) runs.

P9079PCT