EP2573020B1 - Thread laying device and method for producing a yarn bobbin wound with a yarn - Google Patents

Description

The invention relates to a yarn laying device and a method for producing a yarn package wound with a yarn, which has a coil shaft extending along a yarn package longitudinal axis and a conical base disk arranged on the package shaft.

Such constructed yarn packages are commonly referred to as king coils in practice. A yarn wound on a kingpin, in particular sewing thread, becomes in use, for example on a sewing machine, on the head side, i. peeled off the end of the Kingspule via a conical foot disc. These yarn packages are usually arranged in use with vertically oriented yarn package longitudinal axis. The bobbin of the bobbin thereby prevents a gravitational slipping individual loosened yarn turns or entire yarn layers of the yarn package under the yarn package, which could otherwise lead to a yarn ball and thus an interruption of the sewing process.

When winding a yarn on the yarn package mentioned above, the yarn is also wound on the conical disk at the foot end of the yarn package. In practice, each radially outer layer is offset by a defined distance, which usually corresponds to a respective titer or an integer multiple of the titer of the yarn to be wound, compared to an immediately underlying, ie radially inner, yarn layer in the direction of the foot end of the yarn package , The winding width of a yarn layer usually remains unchanged, so that the yarn layers form a total of a side facing away from the foot end of the yarn package Garnflanke that forms a corresponding to the cone angle of the Fußscheibe flank angle with the Garnspulenlängsachse.

The (sewing) yarn has to be wound up very precisely on the yarn package with close-fitting yarn turns within a yarn layer (precision winding). This requires a correspondingly precise feeding of the yarn from the yarn guide to the yarn package, which in turn excludes an arrangement of the yarn guide spaced from the yarn package or a yarn layer already arranged thereon. Such an arrangement would lead to an unguided, ie free, yarn leg between the yarn package and the yarn guide, the length of which is usually referred to as a drag length. Given the usual in practice high winding speeds of today's thread laying devices it would not least due to the forces acting on this unthreaded yarn limb (drag length) forces to one inaccurate Garnablage on the yarn package. For this reason, yarn guides are used in practice for winding up the (sewing) yarn, which rest on the yarn package or on a yarn layer already formed on the yarn package with a definable pressure or rest. As a result, the towing length of the yarn can be eliminated or almost eliminated.

Thread laying devices used in the yarn winding process frequently have a yarn guide designed as a slot drum in this regard. Such a slot drum is for example from the EP 2 170 750 B1 known.

The slit drums are each designed specifically for a narrow range of different yarns, which necessitates replacement of the slit drum when processing inappropriate yarns. Such a conversion of the thread-laying device is less advantageous under production engineering and economic aspects.

From the US Pat. No. 2,593,680 A For example, there has been known a yarn laying apparatus and a method for producing a king-wound yarn package. The yarn laying device has a yarn package holder and a yarn guide, which abuts the yarn package or a yarn package arranged on the yarn package during a winding process, wherein the yarn is wound on the yarn package by means of the yarn guide in mutually axially offset yarn layers and wherein a mechanical control device for controlling the winding process is provided. The yarn guide is reciprocated to form the respective yarn layers relative to the yarn package holder by means of a traversing movement along the yarn package longitudinal axis, wherein a fußscheibenseitige end position of the traversing movement of the yarn guide and the base plate of the yarn package during the winding process along the Garnspulenlängsachse by one of the traversing movement of the yarn guide superimposed feed movement the yarn guide and the yarn package relative to each other are undeliverable. This yarn laying device is designed specifically only for a Kingspulenbauform and only for a narrow bandwidth of different yarns.

The object of the invention is therefore to provide a yarn laying device and a method for producing a wound with a yarn kingpin, which allow for further preserved installation precision of the yarn on the yarn reel less retooling and overall broader applications.

The task relating to the thread laying apparatus is achieved by a thread laying apparatus having the features specified in claim 1 and the object relating to the method is achieved by a thread laying method according to claim 7.

Further advantages and advantageous embodiments of the subject invention will become apparent from the description, the claims and the drawings.

The thread laying device according to the invention allows a high-precision winding a yarn, in particular sewing thread, on a kingpin, ie a yarn package, which is provided at its one end with a conical base plate.

According to the invention, the yarn guide is reciprocable relative to the yarn package holder at a freely definable speed along the yarn package longitudinal axis for forming the respective yarn layers, ie during operation the yarn guide performs a so-called traversing movement with respect to the yarn package holder or a yarn package arranged therein. Characterized in that a fußscheibenseitige end position of the traversing movement of the yarn guide and the base plate along the Garnspulenlängsachse can be delivered to each other during the winding process, the yarn layers to be wound up on the yarn package can be arranged axially offset from one another. As a result, the yarn can increasingly cover the conical foot disk with each yarn layer. A freely movable to form such a traversing movement back and forth yarn guide can be used in a comparison with slotted drums significantly larger number of different yarns and yarn packages. An otherwise required conversion of the thread-laying device can be avoided or eliminated in many cases. The fußscheibenseitige end position of the traversing movement of the yarn guide and the base plate of the yarn package are by one of the traversing movement of the yarn guide superimposed feed movement of the yarn guide, or a yarn guide comprehensive yarn guide device relative to each other undeliverable. The bobbin holder or the thread guide or a thread guide device having the thread guide are preferably arranged displaceably relative to a machine frame of the thread laying device for this purpose. The yarn guide device can be arranged in this respect in particular via a linear guide on the machine frame of the yarn laying device and in this, for example, servomotor, be performed adjustable. As a result, a smaller size of the yarn guide holder, ie of the traction means guided around the deflecting rollers or deflecting wheels, can be realized. To control this mechanical adjustment is preferably a known control device. So that a respective predetermined winding pattern of the yarn is precisely adhered to the yarn package, the control device is programmed to keep constant a resulting from the traversing movement and the traversing movement feed movement relative speed of the yarn guide relative to the yarn package. That is, the Control device is programmed to increase or decrease the speed of the traversing movement of the yarn guide when executing the feed movement depending on a respective (current) traversing movement direction of the yarn guide such that the superimposed feed movement of the yarn guide and the foot end of the yarn package compensated for each other becomes. As a result, an undesired winding over of the individual yarn turns on the yarn package can be prevented as well as an undesired increase in the pitch of the yarn turns on the yarn package in the axial direction compared to a predetermined pitch of the yarn turns. Overall, this ensures a constant symmetrical winding of the yarn on the yarn package.

According to a preferred embodiment of the invention, the speed of the thread guide in its traversing movement (reciprocating motion) on the basis of control signals for controlling the feed movement of the thread guide and the foot-side end to each other to control and / or to regulate. These control signals are available in modern electronic control devices anyway and can be detected without further notice. At the same time thereby a temporal synchronization of the feed movement is made possible with the corrective action to be performed by the control device in the control of the traversing movement of the yarn guide in a simple manner.

The yarn guide is preferably attached to a traction means, which is guided back and forth between pulleys and / or pulleys between a fußscheibenseitigen and a garnspulenkopfseitigen end position and forth. The yarn guide is fixed relative to the traction means axially immovably to this, ie connected to this. The traction means thus defines a trajectory (travel length) of the yarn guide, along which the yarn guide is reciprocable relative to the yarn package to be wound with the yarn during the traversing movement. As a result, a total of one against external disturbances more robust and at the same constructive little allows complex structure of the thread laying device. The traction means according to the invention may be a chain, a rope or a belt.

The fußscheibenseitige end position of the traversing movement of the yarn guide is deliverable according to a preferred embodiment of the invention by controlling the adjustment of the Fußheibenseitigen stroke end of the traction device towards a maximum stroke end position of the traction means on the base plate of the yarn package. That the Hub of the traction means is, based on a Hubmittellage the traction means or the thread guide, increased or the Hubmittellage control side together with the Fußscheibenseitigen Hubendlage, based on a relation to the machine frame stationary reference point of the thread guide device moved. The maximum stroke end position is defined as the maximum possible stroke of the traction means and thus determines a maximum possible deflection of the thread guide from its Hubmittellage. The maximum stroke end position is structurally limited by an active length of the traction device. With known electronic control devices, the stroke end position of the traction means and thus the end position of the traversing movement of the thread guide for each yarn layer can be newly and accurately defined and this if necessary both ends, if desired. The individual base-side stroke end layers of the traction means can be defined in particular as a function of the respective dimensions of the yarn package to be wound with the yarn and / or of the yarn to be wound on the yarn package (titre) and stored, for example, in a memory of the control device. The stored Hubendlagen can be called by the control device and specified for the control of a respective winding process.

The control device can be programmed to track one of the Fußheibenseitigen Hubendlage oppositely arranged Hubendlage the traction means according to the Fußscheibenseitigen stroke end of the traction means, so that the individual yarn layers have a constant axial length on the yarn package. From this, the aforementioned flank angle of the yarn can be formed.

The yarn guide and the foot-side end of the yarn package are preferably successively undeliverable during the winding process of a radially outer yarn layer, that a radially outer yarn layer axially offset relative to an underlying radially inner yarn layer depending on a cone angle α of the base disk of the yarn package can be arranged. The cone angle of the yarn package is greater than 0 ° and less than 90 °. As a result, a yarn reel which is particularly stable in its layer structure and which is also attractively wound with high precision can be produced. In addition, a given absorption capacity of the yarn package can thereby be optimally utilized.

The yarn guide rests on the yarn package to be wound with the yarn or a yarn layer arranged on the yarn package for the precise guidance of the yarn required for this precision winding and therefore, during the winding process, grinds along the yarn package or yarn layer at high speed. For the purpose of the smallest possible and with the simplest means to be set contact pressure of the yarn guide to the yarn package and / or to a yarn layer produced thereon, the contact pressure of the yarn guide to the yarn package or to a yarn package arranged on the yarn layer is determined mainly by a bias of the yarn. For this purpose, the yarn guide can float on the thread used, in a direction radial or tangential to the yarn package, on or on the yarn, i. be hung on this. It is understood that the yarn guide in the direction of the yarn package longitudinal axis, preferably without play, must be performed in order to ensure the required precise Garnablage on the yarn package. In the proposed design eliminates the usual in the art additional components such as springs, weights and the like., For applying or pressing the yarn guide to the yarn package. The yarn guide can also be made lighter and more compact, which is advantageous in terms of a desired high dynamics of the yarn laying device. If necessary, the yarn guide can thereby also be simplified during the winding process cooled.

In the control device according to the invention a plurality of winding programs are stored, ie stored, each aufwickelnde to different Yarns and / or bobbins are matched. The winding programs according to the invention are preferably freely selectable and selectable for a respective winding process. For the purpose of a further improved use width of the yarn laying device, the winding programs are also preferably modifiable or replaceable or expandable by new winding programs.

The invention will be explained in more detail with reference to an embodiment shown in the drawing.

The embodiment shown and described is not meant to be exhaustive, but rather illustrative of the description of 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

eine Fadenverlegevorrichtung zum Herstellen einer mit einem Garn bewickelten Kingspule, mit einem Fadenführer, der mittels einer von einer Steuereinrichtung gesteuerten Changierbewegung gegenüber der Kingspule hin- und herbewegbar ist, in perspektivischer Ansicht;

Fig. 2

ein Aufhängungsprinzip des Fadenführers der Fadenverlegevorrichtung aus Fig. 1;

Fig. 3

die Kingspule aus Fig. 1 in ihrem vollständig mit Garn bewickelten Zustand;

Fig. 4

die Kingspule aus Fig. 1 beim Aufwickeln des Garns während einer Zustellbewegung des Fadenführers in Richtung auf die Fußscheibe der Kingspule bei einer der Zustellbewegung entgegengerichteten Changierbewegung des Fadenführers;

Fig. 5

die Kingspule aus Fig. 1 beim Aufwickeln des Garns während einer Zustellbewegung des Fadenführers in Richtung auf die Fußscheibe der Kingspule und einer zur Zustellbewegung gleichgerichteten Changierbewegung des Fadenführers; und

Fig. 6

ein Blockschaltbild mit einzelnen Schritten eines Verfahrens zum Herstellen einer mit einem Garn bewickelten Kingspule.

In the drawing show:

Fig. 1

a thread-laying device for producing a wound with a yarn Kingspule, with a yarn guide, which is reciprocated by means of a controlled by a control device oscillating movement relative to the kingpin, in perspective view;

Fig. 2

a suspension principle of the yarn guide of the yarn laying device Fig. 1 ;

Fig. 3

the Kings coil Fig. 1 in their fully yarn-wound condition;

Fig. 4

the Kings coil Fig. 1 during winding of the yarn during an advancing movement of the thread guide in the direction of the base plate of the kingpin in one of the feed movement oppositely directed traversing movement of the thread guide;

Fig. 5

the Kings coil Fig. 1 during winding of the yarn during a feed movement of the thread guide in the direction of the base plate of the kingpin and a rectified for advancing movement traversing movement of the thread guide; and

Fig. 6

a block diagram of individual steps of a method for producing a wound with a king-spool kingpin.

Fig. 1 shows a thread-laying device 10 in a perspective view. The yarn laying apparatus 10 has a machine frame 12 , which is only partially reproduced in the drawing, on which a yarn guiding device 14 and a yarn package holder 16 are arranged. In the present case, a yarn spool 18 to be wound with a yarn, which is not reproduced in more detail, is pushed onto the yarn package holder 16 and has a spool shaft 20 which extends along a yarn package longitudinal axis 22 of the yarn package 18. On the spool shaft 20, a conical base plate 24 is arranged. Such trained yarn bobbins 18 are referred to in practice as so-called Kings coils. The yarn package 18 is rotatably driven by means of the yarn package holder 16 about the yarn package longitudinal axis 22 in directions of rotation designated 26 .

The thread guide device 14 comprises a guided around deflection rollers 28 endless traction means 30, which is designed in the present case as a belt. On the traction means 30, a yarn guide 32 is fixed relative to the traction means 30 axially immovable.

The traction means 30 is driven via a coupled in unspecified manner with a drive motor 34 pulley 28 and between a Fußheibenseitigen stroke end 36 and a spaced from this Hubendlage 36 ' back and forth. As a result, the yarn guide 32 can be reciprocated in rapid succession relative to the yarn package holder 16 or the yarn package 18 arranged thereon along the yarn package longitudinal axis 22. This traversing movement of the thread guide 32 is through the Graphically illustrated with a double arrow marked 38 . The traversing movement 38 of the thread guide 32 has a base-side end position 40 and a spaced-apart head end position 40 ' on.

A control device 42 serves to control the winding process, ie in particular a control of the rotational movement of the yarn package 18 about the yarn package longitudinal axis 22 and the control of the traversing movement 38 of the yarn guide 32. The control device 42 is arranged behind a control element 43. The control device 42 can also be provided at another position of the thread laying device 10 or as an external unit.

The Fußheibenseitige end position 40 of the traversing movement of the yarn guide 32 and the base plate 24 of the yarn package 18 are relative to each other undeliverable during the winding process along the Garnspulenlängsachse 22. Thereby, the yarn on the yarn package in axially offset yarn layers (not shown) are arranged. The thread guide device 14 is arranged adjustable in this respect via a linear guide 44 on the machine frame 12 and can be delivered (moved) in the direction of the control device 42 controlled feed 46 in the direction of the base plate 24 of the yarn package 18.

Fig. 2 shows the yarn guide 32 Fig. 1 with the aufzuspulenden on the yarn package 18 yarn 48 in a highly schematic representation and how it rests on the yarn package 18. The yarn guide 32 is floating in unspecified manner on the traction means in the direction 50 of the yarn 48. The yarn to be supplied to the yarn package 18 is held by a predetermined biasing force F under bias. The yarn guide 32 is pressed exclusively by the bias of the yarn 48, that is, by a resultant of the force acting on the yarn 48 biasing force F force vector K, to the yarn package 18.

Fig. 3 shows an above-described yarn package 18 in its fully wound with the yarn 48 state. Individual yarn layers 52 of yarn 48 on the Garnspule are strongly schematized indicated by dashed lines. In the Fig. 3 It can easily be seen that a radially outer yarn layer 52 is arranged offset axially relative to a radially inner yarn layer 52 along the yarn package longitudinal axis 22. The yarn layers 52 each have an identical length dimension L along the Garnspulenlängsachse 22 and therefore form a head side end of the yarn package facing Garnflanke 54. The Garnflanke 54 has a cone angle α corresponding to the basal disc 24 flank angle β on.

Fig. 4 shows the yarn package 18 from Fig. 3 at a time during the winding of the yarn 48 on the yarn package 18. The direction of movement of the traversing movement 38 of the yarn guide is directed along the Garnspulenlängsachse 22 in the direction of the base plate.

On the yarn package 18 individual yarn turns 56 are already wound tightly to each other. The resulting winding pattern thus has a constant predetermined desired pitch angle of the individual yarn turns 56 with respect to a yarn spool longitudinal axis 22 orthogonally aligned reference axis. One of the traversing movement 38 of the yarn guide 32 rectified superimposed feed movement 46 of the yarn guide 32 in the direction of the base plate 24 of the yarn package 18 leads to an increase in the resulting relative speed of the yarn guide 32 relative to the yarn package 18. This leads to an increase in the slope of the yarn package on the 18th At the same time generated yarn turns 56 and the yarn turns are no longer tightly laid to each other, as in Fig. 4 shown.

Fig. 5 shows the case that the feed movement of the thread guide holder ( Fig. 1 ) is directed opposite to the direction of movement of the yarn guide along the yarn package longitudinal axis 22 when the traversing movement 38.

It shows due to the superimposed movements again a distorted winding pattern with now reduced pitch of the simultaneously generated yarn turns 56 relative to the yarn package 18. The yarn turns 56 are not close together, as desired, but other yarn turns 56 previously formed on the yarn package 18.

To avoid in the FIGS. 4 and 5 explained disturbances of the predetermined winding pattern by the feed movement 46 of the yarn guide 32 is the in Fig. 1 shown control device 42 of the yarn laying device 10 programmed to control the traversing movement 38 of the yarn guide 32 in response to the feed movement 46 of the yarn guide 32 and the yarn package 18 relative to each other and / or to regulate, such that a relative movement of the yarn guide 32 relative to the yarn package 18th is kept constant in their speed.

Hereinafter, the method 100 of manufacturing a yarn package wound on a yarn package having a spool shaft extending along a yarn package longitudinal axis and a tapered root disk disposed on a spool shank will be described with additional reference to FIG Fig. 6 explained.

In a first step 110 , the yarn is fed to the yarn package 18 with a yarn guide 32. The yarn guide 32 abuts the yarn package 18 or a yarn package 52 arranged on the yarn package 18 during the winding process, and is formed in a simultaneous step 120 to form the respective yarn layers 56 to form a traversing movement 38 with respect to the yarn package 18 in rapid succession along the yarn package longitudinal axis 22 moved back and forth. The yarn 48 fed to the yarn package 18 is wound onto the yarn package 18 in a further step 130 by means of the yarn guide 32 in mutually axially offset yarn layers 52.

During the winding process, in a further step 140, a foot-disk-side end position 40 (FIG. Fig.1 ) of the traversing movement 38 of the yarn guide 32 and the yarn package 18 along the Garnspulenlängsachse 22 delivered to each other. This is achieved by the thread guide 32 together with the thread guide device 14 via the linear guide 44 (FIG. Fig. 1 ) by a feed movement 46 relative to the machine frame 12 along the yarn package longitudinal axis 22 in the direction of the base plate 24 of the yarn package 18th is moved. A resulting from the traversing movement 38 and the traversing motion feed motion 46 resulting relative speed of the yarn guide 32 relative to the yarn package 18 is held constant in a simultaneous step 150 by the controller.

Claims (7)

1. Thread-laying device (10) for use during the manufacture of a bobbin (18) wound with a yarn (48), which has a spool shaft (20) extending along a bobbin longitudinal axis (22) and a conical foot disk (24) located at the spool shaft (20), with a bobbin support (16) and with a yarn guide (32), which abuts against the bobbin (18) or against a yarn layer (52) located on the bobbin (18) during winding, wherein the yarn (48) can be wound on the bobbin (18) by means of the yarn guide (32) in axially displaced yarn layers (52) and wherein a control means (42) is provided for controlling the winding process, wherein the yarn guide (32) can be moved back and forth relative to the bobbin support (16) by means of an oscillating movement (38) along the bobbin longitudinal axis (22) for forming the respective yarn layers (52), wherein a foot disk-sided end position (40) of the oscillating movement of the yarn guide (32) and the foot plate (24) of the bobbin (18) can be advanced relative to one another during the winding process along the bobbin longitudinal axis (22) by a feed motion (46) of the yarn guide (32), superimposed on the oscillating movement (38) of the yarn guide and the bobbin (18), characterized in that the control equipment (42) is programmed to control or regulate the oscillating movement of the yarn guide (32) depending on the feed motion of the yarn guide (32) and the bobbin (18) relative to one another such that the relative speed of the yarn guide (32) resulting from the oscillating movement (38) and the feed motion (46) in relation to the bobbin (18) is kept constant.
2. Thread-laying device according to claim 1, characterized in that the yarn guide (32) is secured to a traction mechanism (30), which can be moved back and forth around the guide rollers (28) and/or the diverting wheels between a foot disk-sided and a bobbin head-sided stroke end position (36, 36').
3. Thread-laying device according to claim 1, characterized in that the control equipment (42) is programmed to control or regulate the relative speed of the yarn guide (32) in relation to the bobbin (18) on the basis of control signals for controlling the feed motion (46) of the yarn guide (32) and the foot disk of the bobbin (18) relative to one another.
4. Thread-laying device according to one of the preceding claims, characterized in that the yarn guide (32) and the foot disk (24) of the bobbin (18) can be advanced in such a manner that a radial external yarn layer (52) can be arranged axially offset with respect to a radial internal yarn layer (52) as a function of a cone angle α of the foot disk (24) of the bobbin (18).
5. Thread-laying device according to one of the preceding claims, characterized in that a contact pressure of the yarn guide (32) on the bobbin (18) or a yarn layer (52) located on the bobbin (18) is substantially determined by a pre-loading of the yarn (48).
6. Thread-laying device according to one of the preceding claims, characterized in that in the control equipment several winding programs are stored, which are each adjusted to different yarns to be wound and/or bobbins in each case.
7. Method (100) of manufacturing a bobbin (18) wound with a yarn (48), which has a spool shaft (20) extending along a bobbin longitudinal axis (22) and a conical foot plate (24) located at the spool shaft (20), comprising the following steps:

   a) Supplying (110) the yarn (48) to the bobbin (18) with a yarn guide (32), which rests against the bobbin (18) or a yarn layer (52) located on the bobbin (18) during winding; and

   b) Winding (120) the yarn (48) in axially offset yarn layers (52) on the bobbin;

   c) Back and forth movement (130) of the yarn guide (32), forming an oscillating movement (38) with respect to the bobbin (18) for forming the respective yarn layers (52);

   d) Advancing (140) of a foot disk-sided end position (40) of the oscillating movement (38) of the yarn guide (32) and the foot plate (24) of the bobbin (18) relative to one another during winding along the bobbin longitudinal axis (22) by advancing the yarn guide (32) and the foot plate (24) of the bobbin (18) relative to one another by means of a feed motion (46) superimposed on the oscillating movement (38) of the yarn guide (32) along the bobbin longitudinal axis (22), characterized in that the oscillating movement of the yarn guide (32) is controlled depending on the feed motion (46) of the yarn guide (32) and the bobbin (18) relative to one another such that the relative speed of the yarn guide (32) resulting from the oscillating movement (38) of the yarn guide (32) and the feed motion (46) is kept constant in relation to the bobbin (18).

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