DE102017102438A1 - Thread splicing device for a workstation of a cross-wound textile machine - Google Patents

Abstract

The present invention relates to a yarn splicing apparatus (10) for a workstation (2) of a cross-wound textile machine (1) for knot-free joining two yarn ends with a splicing prism (23) having a pneumatically acted splice channel (41) whose Fadeneinfädelschlitz (38) during According to the invention, it is provided that the splicing prism (23) has a guide (19) arranged centrally to the splicing channel (41), in which two insert plates (30A, 30B) are displaceably mounted, each having a recess (37) and which are positionable such that through the recesses (37), a thread entry gap (36) is formed whose width (B) is adjustable by appropriate positioning of the two insert plates (30A, 30B).

Description

The present invention relates to a yarn splicing apparatus for a workstation of a cross-wound textile machine for knot-free joining two yarn ends with a splicing prism having a pneumatically actuable splice, the Fadeneinfädelschlitz remains open during the splicing process.

In the textile industry, thread splicing devices for knot-free joining of two thread ends have long been the state of the art in various embodiments.

Such thread connecting devices, which are used in particular in connection with the jobs of automatic packages, allow by pneumatic whirling two yarn ends the production of yarn compounds that not only have yarn-like strengths, but also have a nearly yarn-like appearance.

At the workstations such automatic packages are known, if it comes during the winding process at one of the jobs to a yarn breakage or if at one of the jobs due to a yarn defect a defined thread cleaner cut was necessary, the yarn ends of the separated thread first by special pneumatic devices in the field of Fadensverlißvorrichtung retrieved. That is, a suction nozzle fetches the thread end of the so-called upper thread accumulated on the surface of the cheese from the cheese and, if necessary after cleaning the thread defect, places it in the splicing channel of the splicing prism of the thread splicer. The thread end of the upper thread is also threaded into a thread clamping device arranged above the splicing prism and into a thread cutting device positioned below the splicing prism. Subsequently or almost simultaneously, the thread end of the so-called lower thread, which originates from a supply reel positioned in Abspulstellung, and is fixed after a winding interruption usually in a thread tensioner, inserted by means of a unterdruckbeaufschlagbaren gripper tube in the splice channel of the splicing prism.

The thread end of the lower thread is also threaded into a thread clamping device arranged below the splicing prism and a thread cutting device arranged above the splicing prism.

Subsequently, the thread ends are cut to length by the thread cutting devices, sucked into so-called holding and Auflöseröhrchen and prepared there for the subsequent splicing process. That is, the thread ends are first freed in the holding and Auflöseröhrchen largely from their Garndrehung before they are withdrawn by a Fadenzuber so in the splice of the splicing prism that the thread ends are positioned in opposite directions, side by side in the splice and then pneumatically swirled can be.

As indicated above, such Fadensleiißvorrichtungen are known in various embodiments and described in detail in numerous patent applications in some detail.

Such thread splicing devices can, for example, as in the DE 39 06 354 A1 described, be equipped with a pivotally mounted cover member which closes the Fadeneinfädelschlitz the splice channel of the splicing prism upwards during the splicing process or the Fadensleiißvorrichtungen can, as in EP 1 522 517 A1 explained, having a splice, the Fadeneinfädelschlitz remains open during the splicing process upwards.

Furthermore, the splice channel of such splicing prisms, such as by the DE 39 06 354 A1 be known, rectilinear, be formed in one piece or, for example, in the DE 36 12 229 C2 described, have a two-part design.

This means that the splice channel of the splicing prism can have two splice channel chambers arranged radially offset from each other, each of which has its own splicing air nozzle opening tangentially.

In order to prevent the yarn ends from being blown upwards out of the splice channel during the splicing process by the inflowing splice air, it is advantageous if the width of the thread insertion slot of the splice channel is upwardly open during the splicing process Splice channel is tuned to the processed yarn material. That is, in the processing of fine yarn material, in order to prevent the fine thread ends from being blown upwards from the splice channel by the splicing air, the thread insertion slit should be as narrow as possible.

Such splice prisms, however, are very disadvantageous in the processing of relatively coarse yarn material, as it is very difficult to thread ends, which consist of a relatively coarse yarn material by a narrow Thread threading slot reliably in the splice channel of the splicing prism to thread.

In order to be able to process different yarn materials with coverless splicing prisms, it has therefore been customary to compromise on the width of the thread threading slot of the splicing channel. That is, the width of the Fadeneinfädelschlitzes the splice channel of the splicing prisms is usually often dimensioned so that the width is slightly too large with respect to fine yarn material, in the processing of coarse yarn material, however, often in the range of the lower portable limit.

Starting from Fadensleiißvorrichtungen the above-mentioned type, the invention has the object to provide a yarn splicing device, wherein the width of the Fadeneinfädelschlitzes the splice channel of the splicing prism is optimally adapted to the requirements of the yarn material to be processed.

This object is achieved by a yarn splicing device in which the splicing prism has a centrally disposed for splice channel guide in which two insert plates are slidably mounted, each having a recess and which are positioned so that a thread entry gap is formed by the recesses whose width can be adjusted by appropriate positioning of the two insert plates.

Advantageous embodiments of the invention are the subject of the dependent claims.

The inventive embodiment of a yarn splicing device has the particular advantage that the width of the thread entry gap is always adjustable in a simple manner Garnngerecht.

That is, in the processing of coarse yarn material, the insert sheets can be easily positioned so that the recesses a Fadeneinlegespalt arises, which has a relatively large width, with the result that no difficulty in threading the splices to be spliced thread ends in the splice of the splicing prism occur.

In the processing of fine yarn material, however, the insert sheets can be positioned so that the width of the thread entry gap formed by the recesses of the insert sheets is as small as possible.

In this way it can be easily prevented that yarn ends, which consist of fine yarn material, are blown upwards during the splicing process by the inflowing splicing air from the open splice channel.

The splicing prism of the yarn splicing device according to the invention can either have a pneumatically actable, one-piece splice channel with a centrally located guide for receiving the two insertion plates, or be equipped with a pneumatically actuable splice channel having two splice channel chambers, whose axes are arranged slightly offset from each other in the axial direction ,

In such a case, the guide for receiving the displaceably mounted Einlegebleche in the region of the contact point of the two staggered splice channel chambers is arranged.

Regardless of the design of the splice channel formed between each equipped with a recess insert plates a constriction, a so-called Fadeneinlegespalt, through which during the splicing of the movement of the splice channel positioned to be connected thread ends a certain resistance is opposed. That is, by using a splicing prism according to the invention not only the risk can be significantly reduced that the yarn ends, in particular of fine yarn material are blown upwards from the splice during the splicing process, but it is also prevented by flow components of the Splicing air to axial displacements of the splice channel of the splicing prism arranged yarn ends comes.

Advantageously, the thread entry gap formed by the recesses of the two insert plates is positioned centrally relative to the thread threading slot of the splicing channel of the splicing prism.

In this way, it is ensured that the yarn ends brought through the suction nozzle or the gripper tube can always be threaded without any problems, that is, with almost no unsuccessful attempts into the splicing channel of the splicing prism.

The use of inventively designed and working Fadensleiißvorrichtungen leads overall to the fact that the efficiency of the jobs of cross-cheesemaking textile machine is very high even with difficult yarn materials.

In an advantageous embodiment, it is also provided that the width of the thread entry gap is infinitely adjustable.

Such a design ensures that the operating personnel of the textile machine can always respond sensitively to the needs of each available yarn material. That is, the operator can always easily adjust the splicing prism so that optimal processing of the present yarn material is guaranteed.

In particular in connection with the processing of elasto yarn, the recesses of the insert sheets can be positioned so as to form a yarn holding element for the thread ends of the thread to be spliced, which are known to strongly curl during the splicing process. That is, Elastogarne whose yarn ends curl strongly after their cutting, especially if no special measures are taken, get caught in the region of the thread entry gap at the recesses of the insert sheets, which means that arranged in the splice channel of the splicing prism thread ends always sufficient Have thread length, so that a proper thread splice can be created.

With regard to the material or the production of the insert sheets various possibilities are conceivable.

In a first advantageous embodiment, the insert plates may, for example, be produced as stamped parts and in such a case are preferably made of a metallic material, for example a tool steel.

In an alternative embodiment, however, it is also conceivable that the insert sheets are made of a technical ceramic.

The production of insert sheets as stamped parts made of a metallic material has the advantage, in particular if a sufficiently high number of pieces is to be produced, that the production of such stamped sheet metal parts with increasing quantities is becoming ever more cost-effective. That is, after creating a corresponding punching tool, the cost of manufacturing such metal stampings are largely limited to the cost of materials.

Although insert plates made of a technical ceramic are more expensive to manufacture than comparable stampings made of tool steel, they have the advantage that the service life of such components is very high due to their high abrasion resistance.

In an advantageous embodiment, it is further provided that the insert plates are fixable in position in the guide of the splicing prism by means of mechanical locking devices. That is, the insert plates slidably mounted in the guide of the splicing prism are not only easily positionable so that the thread insertion gap formed by the recesses of the insert plates has a certain width, but also become reliable by the mechanical locking device which is relatively simple in construction ensures that the insert sheets remain in the set position.

The insert sheets are provided, for example, with holes which correspond in the assembled state with corresponding holes of the splicing prism.

That is, in the assembled state, the holes are covered by mechanical elements, such as bolts, which provide for a fixation of the insert sheets in their leadership.

The invention will be explained in more detail with reference to the embodiments illustrated in the drawings.

• 1 schematisch in Seitenansicht eine Arbeitsstelle eines Kreuzspulautomaten mit einer Fadenspleißvorrichtung, deren Spleißprisma die erfindungsgemäße Ausbildung aufweist,
• 2 in perspektivischer Ansicht das Spleißprisma einer erfindungsgemäß ausgebildeten Fadenspleißvorrichtung mit einem Spleißkanal, der zwei zueinander versetzt angeordnete Spleißkanalkammern sowie eine zwischen den beiden Spleißkanalkammern angeordnete Führung zur Aufnahme zweier Einlegebleche aufweist,
• 3 in perspektivischer Ansicht ein Spleißprisma, das einen durchgehenden Spleißkanal sowie eine mittig des Spleißkanals angeordnete Führung zur Aufnahme zweier Einlegebleche aufweist,
• 4 in perspektivischer Vorderansicht zwei, jeweils mit einer Aussparung ausgestattete Einlegebleche, die im Montagezustand verschiebbar in der Führung des Spleißprismas angeordnet sind,
• 5 eine Draufsicht auf ein gemäß 2 ausgebildetes Spleißprisma, teilweise im Schnitt, mit in der Führung des Spleißprismas gelagerten Einlegeblechen, 6 eine Vorderansicht auf die beiden Einlegebleche, die so positioniert sind, dass ihre Aussparungen einen relativ breiten Fadeneinlegespalt bilden,
• 7 die Einlegebleche gemäß 6, die so positioniert sind, dass ihre Aussparungen einen relativ schmalen Fadeneinlegespalt bilden.

It shows:

• 1 1 is a schematic side view of a workstation of a cheese winder with a yarn splicing device whose splicing prism has the construction according to the invention;
• 2 3 shows a perspective view of the splicing prism of a thread splicing device designed according to the invention with a splicing channel which has two splice channel chambers arranged offset from one another and a guide arranged between the two splice channel chambers for accommodating two insert sheets,
• 3 3 is a perspective view of a splicing prism having a continuous splice channel and a guide arranged centrally in the splice channel for receiving two insert plates;
• 4 in perspective front view two, each with a recess equipped insert sheets, which are arranged displaceably in the mounting state in the leadership of the splicing prism,
• 5 a plan view of a according to 2 formed splicing prism, partly in section, with insertion plates mounted in the guide of the splicing prism, 6 a front view of the two insert plates, which are positioned so that their recesses form a relatively wide thread entry gap,
• 7 according to the insert sheets 6 , which are positioned so that their recesses form a relatively narrow thread entry gap.

In 1 is schematically a side view of a job 2 a cross-wound producing textile machine, in the embodiment of a cheese winder 1 represented.

Such spoolers 1 have a plurality of such, arranged in series next to each other, usually similar trained jobs 2 on.

On these jobs 2 are waste bobbins, for example, spinning rings manufactured on ring spinning machines 9 , which have relatively little yarn material, too large cross-wound bobbins 15 wrapped after being completed on a machine-length cross-bobbin transport device 21 transferred and transported by this to a machine end side arranged Spulenverladestation.

In the embodiment of the cheese winding machine 1 also equipped with a machine-specific logistics device in the form of a spinning-cop and empty-tube transport system 3, from the in 1 only the Kopszuführstrecke 4 , the reversibly drivable storage section 5 , one of the winding units 2 leading transverse transport routes 6 as well as the sleeve return path 7 are shown.

During spooling run in this Spinnkops- and empty tube transport system 3 , in vertical orientation on transport plates 8th positioned, spinning cops 9 or empty tubes.

The over the Kopszuführ range 4 delivered and initially in the storage section 5 intermediate spinning cops 9 In this case, in an unwinding position AS, which in each case in the region of the transverse transport routes 6 in the amount of jobs 2 positioned, and then to large-size cheeses 15 rewound, wherein the running thread is monitored during the winding process at the same time for thread defects out, which are optionally cleaned out immediately.

The individual jobs 2 For this purpose, as known and therefore only indicated schematically, have various facilities that ensure proper operation of these jobs 2 guarantee.

Such jobs 2 For example, each are equipped with Fadenbehandlungs- or thread handling devices, such as thread tensioner, thread cleaner with attached thread cutting device, waxing device, yarn tension sensor and lower thread sensor.

The jobs 2 Such cheese winder 1 Furthermore, each have a suction nozzle 12 , a gripper tube 25 as well as a thread splicing device 10 , In addition, such automatic packages have 1 usually a central control unit 11 on, that, for example, via a machine bus 16 , with the workstation computers 29 the individual jobs 2 connected is.

How out 1 further apparent, have the jobs 2 for winding the cheeses 15 also each with a winding device 24 including a coil frame 28 which is about a pivot axis 22 movably mounted and with a device for rotatably supporting the sleeve of the cheese 15 Is provided.

During the winding process lies in the coil frame 28 Freely rotatably mounted cross-wound bobbin 15 with its surface, for example, on a so-called yarn guide drum 14 on and is taken by this about friction. As such thread guide drums 14 are known to have a so-called Fadenführungsnut, the incoming thread is also guided during the winding process so that it runs in criss-cross winding layers on the package.

Instead of a yarn guide drum, however, a grooveless bobbin drive roller can be used, which rotates the cheese only during the winding process frictionally.

In such a case, the traversing takes place on the cheese 15 running thread by means of a separate, for example equipped with a finger thread guide Fadenchangiereinrichtung.

The around a pivot axis 13 limited rotatably mounted suction nozzle 12 is used when after a winding interruption on the surface of the cheese 15 accumulated thread end of a top thread 31 taken and to the thread splicer 10 to be transferred.

Similarly, with the around a pivot axis 20 limited rotatable gripper tube 25 after a Spulunterbrechung the end of a thread with the spinning cop 9 associated lower thread 32 handled. That is, the gripper tube 25 takes over the thread end of the lower thread fixed in the thread tensioner 32 and also transfers it to the thread splicing device 10 ,

The thread splicing device 10 is preferably via a corresponding (not shown) receiving device to the housing 33 the job 2 connected and thereby, as usual, with respect to the regular, that is, the usual during the winding process yarn path, a bit set back.

As is known, in the field of yarn splicing apparatus 10 also arranged (not shown) holding and Auflöseröhrchen with which the yarn ends are prepared for the splicing process.

Furthermore, in the field of thread splicing device 10 additional, not shown in the drawings for reasons of clarity thread handling devices such as thread clamping devices, thread cutting devices and a yarn feeder arranged.

The thread splicing device 10 , which operates without a cover element, has, as follows with reference to the figures 2 - 5 explained in more detail, via an arranged on a (not shown) air distributor body splicing prism 23 , which is a pressurizable splice channel 41 has, the Fadeneinfädelschlitz 38 remains open during the splicing process.

The splice channel 41 of the splicing prism 23 in which the yarn ends of an upper thread 31 and a lower thread 32 can be connected pneumatically, has either, such as by the DE 36 12 229 C2 known and in the 2 and 5 shown, two splice channel chambers 17 . 18 on whose axes 26 . 27 are slightly offset from each other or is, as in 3 represented with a one-piece, continuous splice 41 fitted.

The splicing prism 23 also points orthogonal to the axes 26 . 27 the splice channel chambers 17 . 18 or to the axis 34 the continuous splice channel 41 a guide 19 for receiving two insert sheets 30A . 30B on.

In each of the splice channel chambers 17 respectively. 18 of the two-part splice channel 41 or in the continuous, one-piece splice channel 41 opens, preferably each obliquely from above, at least one splice air nozzle, not shown in the drawings for reasons of clarity.

The splice air nozzles are in turn, as usual, to an air distribution system of the textile machine 1 connected via the splice channel 41 of the splicing prism 23 or the splice channel chambers 17 respectively. 18 of the splice channel 41 If necessary, can be acted upon with compressed air.

In the 4 Perspective illustrated insertion sheets 30A . 30B are limited in the leadership 19 of the splicing prism 23 stored and each have a recess 37 on, in the during the splicing process to be spliced yarn ends of upper and lower thread 31 . 32 to store.

By appropriate positioning of the insert sheets 30A . 30B gets through the recesses 37 a thread entry gap 36 formed, whose width B is infinitely adjustable, and whose width between the width of Fadeneinfädelschlitzes 38 of the splicing prism 23 and zero 0 is variable.

The insert sheets 30A . 30B For example, are formed as a metallic stamped part or made of a technical ceramic and each have except a recess 37 a bore and a recess of a mechanical locking device 35.

In the present embodiment, the mechanical locking device 35 formed for example by bolts, which in the assembled state, the holes shown or recesses in the insert plates 30a . 30b and holes in the splicing prism 23 by grasp.

As in particular from the 5 which shows a plan view of a splicing prism formed according to the invention 23 shows in the operating state are in the guide 19 of the splicing prism 23 insert plates 30A . 30B arranged and by mechanical locking devices 35 secured. The leadership 19 runs between the staggered splice channel chambers 17 . 18 of the splice channel 41 of the splicing prism 23 ,

The in the insert sheets 30A . 30B arranged recesses 37 form a thread entry gap 36 whose width B, as explained above, is infinitely adjustable. That is, in the operating state of the yarn splicing device 10 are the insert sheets 30A . 30B so in the lead 19 of the splicing prism 23 For example, between the staggered splice channel chambers 17 . 18 of the splice channel 41 is arranged, positioned and secured, that the recesses 37 the insert sheets 30A . 30B during the splicing a Fadeneinlegespalt 36 form.

The thread entry gap 36 in turn forms a bottleneck for the splicing air flows and a locking point for the yarn ends to be spliced of upper and lower thread 31 . 32 and prevents the thread ends from splicing 41 can be blown out.

In 6 a situation is presented, as it is given in the processing of relatively coarse yarn material. That is, the insert sheets 30A . 30B are so in the lead 19 of the splicing prism 23 positioned their recesses 37 a relatively wide thread entry gap 36 form. By such a relatively wide Fadeneinlegespalt 36 Ensures that threading is relatively thicker Thread ends in the splice channel 41 can be guaranteed.

According to 7 are the insert sheets 30A . 30B but so in the lead 19 positioned that through the recesses 37 the insert sheets 30A . 30B formed thread entry gap 36 is relatively narrow.

Such a relatively narrow thread entry gap 36 is used when fine yarn material is processed and to prevent the inflowing splice air, the thin and light ends of the thread upwards from the splice 41 blows.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 3906354 A1 [0008, 0009]
• EP 1522517 A1 [0008]
• DE 3612229 C2 [0009, 0059]

Claims (9)

Thread splicing device (10) for a work station (2) of a cross-wound textile machine (1) for knot-free joining two thread ends, with a splicing prism (23) having a pneumatically actuable splice channel (41) whose Fadeneinfädelschlitz (38) remains open during the splicing process , characterized in that the splicing prism (23) has a guide (19) arranged centrally to the splicing channel (41), in which two insert plates (30A, 30B) are displaceably mounted, each having a recess (37) and being positionable in that a thread entry gap (36) is formed by the recesses (37), the width (B) of which can be adjusted by appropriate positioning of the two insert plates (30A, 30B). Thread splicer (10) after Claim 1 , characterized in that the splicing prism (23) has a splice channel (41) with two splice channel chambers (17, 18) whose axes (26, 27) are offset from one another in the axial direction. Thread splicer (10) after Claim 2 , characterized in that the guide (19) in the region between the two splice channel chambers (17, 18) is arranged. Yarn splicing device (10) according to one of the preceding claims, characterized in that the thread entry gap (36) formed by the recesses (37) of the two insert plates (30A, 30B) is arranged centrally with respect to the thread threading slot (38) of the splicing channel (41). Thread splicing device (10) according to one of the preceding claims, characterized in that the width (B) of the thread entry gap (36) is infinitely adjustable. Thread splicer (10) after Claim 5 , characterized in that the width (B) of the Fadeneinlegespaltes (36) is adjustable so that the recesses (37) of the insert plates (30A, 30B) a yarn holding element for the during the splicing process strongly curling yarn ends (31, 32) of Elastogarn form. Thread splicing device (10) according to one of the preceding claims, characterized in that the insert sheets (30a, 30B) are made as stamped parts from a metallic material. Thread splicing device (10) according to one of the preceding claims, characterized in that the insert plates (30A, 30B) are made of a technical ceramic. Thread splicing device (10) according to any one of the preceding claims, characterized in that the insert plates (30A, 30B) by means of mechanical locking means (35) positionally in the guide (19) of the splicing prism (23) are fixable.

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