DE102018101925A1 - Splicing prism for a splicing device - Google Patents

Abstract

The splicing prism (23) has a splicing channel (17) with at least one splice channel chamber (18) In accordance with the present invention, the at least one splicing air bore (19) comprises an orifice part opening into the splice channel chamber (18) (according to the present invention). 30) and an inlet part (27) communicating with the mouth part (30), the inlet part (27) having a circular cross-section and narrowing via a slope (34) to the mouth part (30) so as to have a semicircular cross-section.

Description

The invention relates to a splicing prism for a splicing device, a splicing device comprising such a splicing prism and a package-forming textile machine comprising such a splicing device.

In the textile industry splicing devices have been part of the state of the art for a long time and are described in detail in numerous industrial property applications. For example, splicing devices which produce a nearly yarn-like thread connection by pneumatic swirling of two yarn ends are known. The splicing devices comprise a splicing prism, bores which can be subjected to compressed air, the so-called splicing air holes, and a longitudinal groove which forms the so-called splice channel. The splices produced in the splicing devices are a decisive criterion for the yarn quality, they should not only have yarn-like strengths, but also have a yarn-like appearance as possible.

That is, when it comes to a yarn breakage during the manufacturing process on a casserole-producing textile machine or when a defined cleaner cut was made at one of the jobs of the textile machine due to a yarn defect, the yarn ends of the separated yarn are first by special pneumatic devices in the region of the splicer retrieved.

Usually, a suction nozzle retrieves the so-called upper thread from the package and puts it, possibly after cleaning the thread error, in the splice channel of the splicing prism of the splicer. The upper thread is also threaded through the suction nozzle in a arranged above the splice channel thread clamping device and positioned below the splice channel thread cutting device.

Accordingly, the so-called bobbin thread, which originates from a feed bobbin positioned in the unwinding position, is inserted into the splicing channel by means of a gripper tube which can be subjected to negative pressure and threaded into a thread clamping device arranged below the splicing channel and a thread cutting device arranged above the splicing channel. The yarn ends are then cut to length by the thread cutting devices, sucked into so-called holding and Auflöseröhrchen and prepared there for the subsequent splicing process.

This means that 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 that the thread ends in the splice, in opposite directions, next to each other and there finally can be pneumatically swirled ,

The DE 36 12 229 C2 discloses a splicing apparatus which dispenses with the use of a lid member and whose splicing prism has a two-part splice channel. In other words, in this known splicing device, the splicing channel of the splicing prism is divided into two splice channel chambers arranged radially offset from one another, each of which has its own splicing air nozzle opening tangentially. The splicing air flowing in via the splicing air nozzles during the splicing process generates eddy currents directed in opposite directions in the splice channel chambers.

It is eminent for the quality of the splice connections how the air stream enters the splice channel, in particular with which air velocity and which flow conditions arise in this way in the splice channel. This is especially true in so-called core yarns, where a core thread or core is made up of an elastic filament / yarn around which the short staple fibers are spun around.

A first aspect of the invention therefore relates to a splicing prism for splicing apparatus for knotless joining of two yarn ends at a work station of a package producing textile machine, the splicing prism having a splice channel with at least one splice channel, the pneumatic admission of the splice via at least one splice hole opening into the splice channel he follows. Preferably, the splice channel can be configured with two splice channel chambers, wherein the pneumatic actuation of the splice channel takes place via at least one splicing air bore opening into each of the two splice channel chambers.

The proposed splicing prism is characterized in that the at least one splice hole comprises a mouth part opening into the splice channel and an inlet part communicating with the mouth part, the inlet part having a circular cross-section and narrowing towards the mouth part by a slope so as to be semi-circular Cross section has. A semicircular cross-section is understood to mean such a cross-section, in which the arc of a circle is configured by at least one radius and by at least two mutually different radii which are mutually different.

The splicing air holes for the splicing air according to the preferred embodiment, which are provided in both splice channel chambers, are arranged in such a way that opposite eddy currents are generated in the splice channel chambers. Due to the proposed geometry of the splicing air bore or the splicing air holes, the splicing air reliably enters the splice channel and ensures optimal flow conditions for splicing there. The air flow becomes more compact and has an optimized air outlet spreader angle. Due to the slope and the semicircular cross-section of the muzzle part, a turbulence-reducing contour of the splicing air bore can be ensured, resulting in a higher air velocity of the splicing air passing through the splicing air bore and an improved splice connection being produced by means of the air flow.

Instead of a continuous circular cross-section of the splice air bore, the same narrows across the slope and opens with a semicircular cross-section in the splice channel or in the splice channel chamber. The air can strike and act more evenly, in a gentle manner and flat on the thread ends inserted in the splice channel.

The swirling flow along the walls of the splicing channel thus formed upon entry of the splicing air leads to intimate mixing and twisting of the fibers of the threads to be joined. The splice is short and has a high yarn-like elasticity with good strength. In addition, the splice thus produced has an almost yarn-like appearance.

Furthermore, the changed geometry of the muzzle part of the splicing air bore also has a particularly advantageous effect on splice connections of core yarns. The arranged around the soul fiber ends can be swirled in a more homogeneous manner with each other, which can be particularly advantageous to put the soul.

In this case, no specific ratio of the lengths of the mouth part and the inlet part or the slope must be complied with. It essentially depends on the circular cross-section of the inlet part, which merges by means of the slope into a semicircular cross-section opening into the splicing channel. Depending on the total length of the splicing air bore, different lengths for the respective sections of the inlet part, the muzzle part and the slope are conceivable within the scope of the invention.

In a further advantageous embodiment of the invention, the splice channel or each of the splice channel at least one to a feed direction of the thread ends in the splice or to a leading into the splice channel Fadeneinführschlitz for feeding the thread ends in the splice channel obliquely, opening into the splice channel splicing air hole , In other words, a center axis of the splicing air hole is preferably made oblique to the thread insertion slot or to the feeding direction of the thread ends in the splicing channel. The oblique position is further preferably formed in the splicing prism so that the center axis to the Zuführrichtungsachse an angle of less than 90 ° and further preferably in the direction of Spllechkanalgrundes, ie opposite to the direction of the elongated, the Fadeneinführschlitz forming splice opening is directed.

The splicing air hole preferably opens tangentially and further preferably in the immediate vicinity of the yarn insertion slot leading from above into the splice channel into the splice channel. That is, when injected into the splice channel chamber, the splice air generates a swirling flow along the walls of the splice channel chambers, which results in intimate mixing and twisting of the fibers of the thread ends to be joined. By adapting the geometry of the splice channel chambers and the location of the splice hole, it is thus possible to ensure that the splicing air strikes the thread ends immediately after it has been injected and mixes the free fiber ends. Subsequently, the thread / fiber ends are fluidized by the rotational flow and thereby properly twisted together.

Preferably, the at least one splicing air bore or each of the two splicing air holes can be connected via an air distribution system to an air channel of the yarn splicing device, via which the splice channel can be acted upon with compressed air if necessary.

By connectable to an air duct air distribution system the possibility is created in a simple way to connect the arranged in each of the two splice channel splice air bore to a common compressed air source. That is, despite the axial subdivision of the splice of the splicing prism in two splice channels and their particular radial offset is given by the air distribution system a reliable coupling of splice holes and thus ensured that mutually opposite eddy currents can be generated in the splice channel.

A second aspect of the invention therefore relates to a splicing device with a splicing prism.

A splicing device is proposed, in which the splicing prism is designed according to one of the embodiments described above.

With such splicing splice connections can be made that meet the highest quality requirements, without the structurally complex or expensive splicing devices must be used.

A third aspect of the invention therefore relates to a package forming textile machine having a plurality of work stations, the textile machine comprising at least one splicer. This textile machine may, for example, be one in which a common splicing device is provided for a plurality of workstations or one splicing device per workstation.

The package-forming textile machine is characterized in that the splicing device is formed by a splicing device according to one of the embodiments described above.

On textile machines comprising such a splicing device, yarns can be produced which have a high quality and whose splice connections are almost identical in terms of both appearance and strength. It is also possible to produce core yarns of particularly good quality on such textile machines, which as a result of the elastic core and the fibers spun around are usually always somewhat more difficult to manufacture, in particular in the production of the splice connections.

Further features and advantages of the invention will become apparent from the following description of preferred embodiments of the invention, with reference to the figures and drawings showing essential to the invention details, and from the claims. The individual features may be implemented individually for themselves or for several in any combination in a preferred embodiment of the invention.

• 1 schematisch in Seitenansicht eine Arbeitsstelle einer Spulmaschine mit einer Spleißvorrichtung aufweisend ein Spleißprisma nach einem Ausführungsbeispiel;
• 2 schematisch eine Spleißvorrichtung mit einem Spleißprisma nach einem Ausführungsbeispiel;
• 3 schematisch ein Spleißprisma mit zwei Spleißkanalkammern nach einem Ausführungsbeispiel.

Preferred embodiments of the invention are explained below with reference to the accompanying drawings.

• 1 schematically in side view a workstation of a winder with a splicer comprising a splicing prism according to an embodiment;
• 2 schematically a splicing device with a splicing prism according to an embodiment;
• 3 schematically a splicing prism with two splice channel chambers according to one embodiment.

In 1 is schematically a side view of a job 2 a casserole producing textile machine 1 , which is designed as a winder in this embodiment, shown.

Such winding machines have a plurality of such, in series juxtaposed, 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 bulky packages 15 here reels, wrapped, which after their completion on a machine-length cross-bobbin transport device 21 transferred and transported by this to a machine end side arranged Spulenverladestation.

In the exemplary embodiment, the winding machine is also equipped with a machine-specific logistics device in the form of a spinning cop and empty-tube transport system 3 equipped, from the in 1 only the Kopszuführstrecke 4 , the reversibly drivable storage section 5 , one of the jobs 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 packages 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 with Fadenbehandlungs- or thread handling devices, such as thread tensioner, Thread cleaner equipped with attached thread trimming device, waxing device, yarn tension sensor and bobbin thread sensor.

The jobs 2 Furthermore, such winding machines each have a suction nozzle 12 , a gripper tube 25 as well as a splicing device 10 , In addition, such winding machines usually often have 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 visible, have the jobs 2 for winding the packages 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 package 15 Is provided.

During the winding process lies in the coil frame 28 freely rotatable supported package 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 package 15 accumulated thread end of a needle thread 31 taken and to the 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 splicer 10 ,

The splicer 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 splicing device 10 also arranged (not shown) holding and Auflöseröhrchen with which the yarn ends are prepared for the splicing process.

Furthermore, in the area of the 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 splicer 10 , which in particular can do without a cover element has, as described below with reference to 2 and 3 explained in more detail, via a splicing prism 23 , which is a pressurizable splice channel 17 having.

2 shows a splicer 10 with an inserted splicing prism 23 , The splice hole 19 is in turn about an air distribution system 26 to an air duct 35 connected via the splice channel 17 of the splicing prism 23 If necessary, can be acted upon with compressed air.

How out 3 as can be seen, flows into each of the splice channel chambers 18 , Seen from obliquely above in the direction of presentation, a splice hole 19 , In other words, each splice channel chamber 18 one to a feeding direction of the thread ends in the splice channel 17 or to one in the splice channel 17 leading thread insertion slot 36 for feeding the thread ends into the splice channel 17 sloping, in the appropriate splice channel chamber 18 opening splice hole 19 on. A center axis of the splice hole 19 is oblique to the Fadeneinführschlitz 36 or to the feed direction of the thread ends in the splice channel 17 hired. The oblique position is so in the splicing prism 23 formed such that the center axis to the Zuführrichtungsachse an angle of less than 90 ° and includes in the direction of the splice channel bottom, ie opposite to the direction of the elongated, the Fadeneinführschlitz 36 training splice channel opening is directed. After the yarn ends to be spliced are prepared in the splice channel 17 come to rest, the splice air holes 19 pressurized with compressed air.

Entering over the formed with a circular cross section inlet part 27 the Spleißluftbohrung 19 the spliced air flows at the slope 34 along the estuary 30 the splicing air hole 19 , which has a semicircular cross-section in the splice channel 17 respectively in the respective splice channel chamber 18 empties. Due to the vortex reducing design of the splice hole 19 the airflow becomes more compact and has a higher speed. From the semicircular cross-section of the mouth part 30 the spliced air that is guided in this way exits flat and swirls the fiber ends of the splice channel 17 inserted thread, so that an optimal splice connection of the yarn ends is formed, which has almost yarn-like properties.

LIST OF REFERENCE NUMBERS

1

textile machine

2

place of work

3

Spinning cop and empty tube transport system

4

Kopszuführstrecke

5

storage line

6

Transverse transport paths

7

Tube return path

8th

transport plate

9

Spinning cops

10

splicer

11

Central control unit

12

suction nozzle

13

swivel axis

14

Thread guide drum

15

A package

16

machine bus

17

splicing

18

Spleißkanalkammer

19

Spleißluftbohrung

20

swivel axis

21

Cheese transport device

22

swivel axis

23

splicing prism

24

spooling device

25

gripper tube

26

Air distribution system

27

inlet portion

28

creel

29

Work station computer

30

mouth part

31

upper thread

32

lower thread

33

casing

34

slope

35

air duct

36

Fadeneinführschlitz

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 3612229 C2 [0007]

Claims (5)

Splicing prism (23) for a splicing device (10) for knot-free joining of two thread ends at a workstation (2) of a package forming textile machine (1), said splicing prism (23) having a splice channel (17) with at least one splice channel chamber (18) characterized in that the at least one splice hole (19) opens into the splice channel chamber (18) opening mouth part (30) and one with the Mouth part (30) communicating inlet part (27), wherein the inlet part (27) has a circular cross section and narrows via a slope (34) to the mouth part (30) that it has a semi-circular cross-section. Splicing prism (23) after Claim 1 , characterized in that the at least one splice hole (19) to a leading into the splice channel (17) Fadeneinführschlitz (36) obliquely, in the splice channel chamber (18) is designed opening. Splicing prism (23) after Claim 1 , characterized in that the at least one splice hole (19) via an air distribution system (26) to an air channel (35) of the splicing device (10) is connectable via which the splice channel (17) in case of need can be acted upon with compressed air. Splicing device (10) with a splicing prism (23), characterized in that the splicing prism (23) is formed by a splicing prism (23) according to one of the preceding claims. A yarn package producing textile machine (1) having a plurality of work stations (2) and at least one splicing device (10), characterized in that the at least one splicing device (10) is moved by a splicing device (10) Claim 4 is trained.

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