EP3553005A1 - Workstation of a textile machine for creating cross-wound spools - Google Patents

Abstract

The invention relates to a work station (1) of a textile machine producing cross-wound bobbins with a thread guide channel (6) which surrounds the thread path and which is located between a thread feed device, in particular a supply bobbin (2) positioned in the unwinding position (AS), and a winding device (4) of the work station ( 1) and has several bearing housings and / or bearing sections for the installation of various thread treatment and thread monitoring devices, in particular a thread splicing device (8). The invention is characterized in that the thread guide channel (6) accommodates a thread treatment or thread monitoring device in the region of at least one Bearing housing (18) or bearing section has a monitoring section via which monitoring of the thread treatment or thread monitoring device installed in the bearing housing or bearing section by means of an optical recording that can be connected to a computer device (24, 38) gseinrichtung (7) is realizable.

Description

The invention relates to a workstation of a textile machine producing cross-wound bobbins with a thread guide channel which surrounds a thread feed device, in particular a feed bobbin positioned in unwind position, and a winding device of the work station and a plurality of bearing housings and / or bearing sections for installing various thread treatment and thread monitoring devices. in particular a thread splicing device.

In the textile industry, different embodiments are known in connection with cross-wound textile machines, for example automatic winder or spinning machines, which are described in some detail in the patent literature. The reciprocating machines often differ not only in terms of the supply of their numerous jobs with fresh spinning heads, but also in terms of the training of their own working yarn paths. This applies equally to spinning machines which have a spinning unit for producing a thread, which is then fed to the thread running path.

In cross-wound producing textile machines, in particular automatic winder, it has long been known to supply the jobs such textile machines with fresh spinning heads, such as in the DE 10 2005 001 093 A1 or in the DE 10 2014 002 149 A1 described to provide a machine-owned logistics system in the form of a cop and sleeve transport device, which is connected to comparable logistics systems upstream textile machines, preferably ring spinning machines.

It is also known in connection with automatic winder that the jobs of such textile machines are each equipped with a so-called round magazine, in each of which a plurality of spinning cops is stored. Such round magazines are on demand, such as in the DE 195 39 762 B4 , of the DE 198 16 188 A1 or the DE 10 2008 057 806 A1 described, manually refilled by the operating personnel.

The jobs of these widely used in the textile industry textile machines generally each have a yarn path, which is largely open at least forward and thus well visible to the operator.

This means that on the workstations of such textile machines, the yarn withdrawn from a spinning cop positioned in an unwinding position travels through different crosshairs, such as a bobbin thread, on its way to a cross-wound bobbin in a winder Thread tensioner, a thread cleaner with a thread trimmer, a yarn tension sensor and optionally a waxing device, but remains largely visible.

Such trained jobs are further each equipped with a thread connecting device, preferably with a pneumatically operated Fadenspleißvorrichtung, a pneumatically actuated suction nozzle and a pneumatically acted upon gripper tube.

The suction nozzle and the gripper tube are connected to a textile machine's own vacuum system and ensure after a thread break or a controlled thread cleaner cut that recorded on the cheese package end of the upper thread or fixed in the thread tensioner thread end of the lower thread is received and transferred to the Fadensleißvorrichtung. In order for the yarn joints made in the yarn splicing apparatus always to have an almost yarn-like appearance and an approximately yarn-like strength, the two yarn ends are further cleaned, exactly cut to length, prepared and properly positioned in the splicing channel of the splicing prism of the yarn splicing apparatus before the splicing process.

For this purpose, in the field of such usually with respect to the regular yarn path a bit set back arranged yarn splicing devices not only pneumatically actuated holding and Auflöseröhrchen, but also Fadenklemm- and -schneideinrichtungen and a so-called yarn feeder arranged.

However, it is also the case with textile machines producing cross-wound bobbins It is known that the work stations can each have a closed thread guide channel, which is in each case equipped with a plurality of bearing sections or bearing housings in which different thread monitoring and treatment devices are installed.

In such trained, for example in the DE 10 2010 049 515 A1 relatively detailed described jobs, which is formed between a positioned in Abspulstellung feed bobbin and the winder of the work extending thread running path over its entire length as a closed Fadenleitkanal and sections, specifically acted upon by negative pressure. That is, negative pressure flows can be realized in the yarn guide channel whose flow directions can be predefined.

Like in the DE 10 2010 049 515 A1 described in detail, takes place in such a trained jobs in the case of a Spulunterbrechung necessary transfer of the thread ends of the yarn splicing device by creating appropriate vacuum flows in the closed Fadenleitkanal. That is, in such trained jobs neither a pivotally mounted suction nozzle, nor a pivotally mounted gripper tube is needed.

This waiver of both a suction nozzle and a gripper tube, in particular the waiver of the associated bulky drive units, causes jobs that work with a closed Fadenleitkanal, have a significantly lower overall width than jobs where the Fadenlaufweg freely accessible from the front is.

By integrating the various Fadenüberwachungs- and treatment facilities in the thread running path enclosing Fadenleitkanal is also achieved that the current thread is largely encapsulated during the winding process against the environment, which has a very positive effect especially with regard to the development of dirt at the workstations.

A disadvantage of jobs with such a closed Fadenleitkanal is, however, that the thread runs largely concealed on its way from the spinning cop to the cheese for the operator and therefore it is neither controllable for the operator, whether the current thread on its way to the winding device, the thread monitoring devices always passes properly, nor whether the thread splicer works properly. That is, it is neither comprehensible to the operator, whether the thread was properly monitored before winding on the cheese, or if proper Fadenspleiße were created if necessary.

These difficult observation conditions are still blatant at workplaces that are equipped with a closed thread guide channel and that are also equipped with a round magazine for the supply of fresh spinning cops.

In jobs designed in this way, the yarn splicing device is not only arranged, as is usual with closed yarn guide channels, in a relatively concealed manner in a bearing housing, but the bearing housing is also covered, at least partially, by the round magazine. That is, especially in jobs that have a closed Fadenleitkanal and are also equipped with a round magazine, the splicing prism and thus the splice of the Fadensleiißvorrichtung is barely visible.

Since the splicing operation is barely monitorable for the operating personnel or the splicing result is barely controllable, it is hardly possible for the operating personnel to decide whether the thread splicing device is working properly or if corrections of the adjusted splicing parameters would be advantageous at the thread splicing device.

The patent literature also discloses the use of image recording devices in connection with textile machines producing cross-wound bobbins.

In the DE 198 36 071 A1 For example, a method or an associated device are described, with the help of which a detection of thread residues on spinning head sleeves is possible.

In this known method, the spinning cop tube to be examined with the Irradiated light from at least one light source and reflected from the spinning head sleeve light from an image pickup device, for. As a CCD camera, and converted into digital image data. The digital image data are fed to an evaluation computer and evaluated by this to the effect that the presence of thread residues on the spinning head sleeve can be assessed.

By the DE 10 2008 029 575 A1 Furthermore, a cross-wound textile machine with a plurality of jobs and at least one movable along the workstations service unit for operation and / or maintenance of the individual jobs is known.

The service unit in this case has a camera which is set up to generate images of the service unit and / or the workstations and to transmit them to a control and computer unit of the textile machine. The control and processing unit processes the transmitted information and uses it to control the service unit and / or to operate and / or control a pending job.

Based on the aforementioned prior art, the present invention seeks to modify a job of a cheese-producing textile machine having a closed Fadenleitkanal to the effect that the operation of a Fadenbehandlungs- or thread monitoring device for the operator is traceable and correctable if necessary.

This object is achieved in that the thread guide channel has a monitoring section in the region of a bearing housing or bearing section accommodating a thread treatment device or thread monitoring device via which monitoring of the thread treatment device or thread monitoring device installed in the bearing housing or bearing section can be performed by means of an optical linkable to a computer device Recording device can be realized.

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

The otherwise unavailable for the operating personnel in Fadenleitkanal Fadenbehandlungs- or thread monitoring devices can now be checked on your operation and functionality, if necessary, continuously, periodically or at defined times by the operator or automatically by an analysis device, for example. In the form of a computer device.

Preferably, at least or only the at least one monitoring section of the yarn guide channel is designed to be transparent, wherein the optical recording device can be arranged or arranged at the monitoring section or at a distance therefrom. More preferably, the Fadenleitkanal be formed predominantly or completely transparent. In the context of the invention, a predominantly transparent design is present when the yarn guide channel is designed to be transparent not only to monitoring sections for monitoring the yarn treatment or yarn monitoring devices, but also to different sections thereof. As a result, not only the corresponding device but also an interior of the thread guide channel can be monitored in regions outside the installed device.

As an alternative to this, the yarn guide channel can exclusively have at least one transparently formed monitoring section. To such monitoring sections different sections of Fadenleitkanals are thus formed in a non-transparent manner. As a result, a light incidence or other optical interference influences can be avoided in the Fadenleitkanal. In this context, it is further preferred to be able to close the transparent trained monitoring section with a non-transparent lid, wherein the non-transparent lid on the Fadenleitkanal can be movably mounted or mounted to meet needs-based covering and releasing the transparent monitoring section. The yarn guide channel may preferably have corresponding mounting aids, such as, for example, fastening and / or locking means.

Further preferably, the monitoring section can form a receptacle for the optical recording device. As a result, the optical recording device can be suitably arranged on the monitoring section and more preferably be mounted in a stationary manner by providing corresponding fastening and / or locking means.

In a complementary preferred manner, the transparent configuration of the monitoring section can be provided such that an unadulterated insight into the Fadenleitkanal or to the corresponding associated Fadenbehandlungs- or thread monitoring device is made possible. In other words, the transparent monitoring section is designed such that distortions, optical reductions or optical magnifications (magnifying effect) are avoided. If, for example, an enlargement should be required, such could be realized by means of the optical recording device, since this either itself means for reducing or enlarging the image to be recorded or the recorded image can be provided by the optical recording device in an appropriate manner on the software editable.

In accordance with a further preferred embodiment, the optical recording device which can be connected to a computer device is arranged in or on the monitoring section in the region of a bearing housing or bearing section which can be used to monitor at least the splicing process and, in particular, the work result of the splicing prism of the yarn splicing device. This embodiment has the particular advantage in the course of, for example, the formation of a so-called pilot job that can be prevented in a relatively simple manner that the Fadenspleißvorrichtungen the jobs of a cheese, for example, due to incorrect setting of the yarn splicer, undetected create thread connections that do not comply with the requirements. That is, although the yarn splicing apparatus may be protected and arranged for operators almost inconspicuous in a bearing housing of a closed Fadenleitkanals takes place during the splicing process instead of monitoring the Fadens splitting device, the result of this monitoring by the operator visible and thus controllable.

In an advantageous embodiment, it is provided that each of the numerous work stations of a textile machine is designed as described above.

In this way it can be ensured that not only the thread treatment or Yarn monitoring device, in particular a yarn splicing device, a pilot job continuously, periodically or at defined times can be monitored, but that despite a possibly somewhat obscured installation position of the yarn treatment or thread monitoring device easy monitoring this is guaranteed at all jobs of the textile machine.

Preferably, the optical recording device is in each case designed as a video camera. Such a relatively inexpensive video camera has the advantage that in such a camera, in contrast to a film camera for example, the recorded images are stored in the form of electronic signals. The electronic signals can be easily and inexpensively displayed as images on the monitor of a downstream computer device.

As a downstream computer device on the monitor, which are made visible by the optical recording devices images can be used in an advantageous embodiment either the central control unit of the textile machine or a portable tablet or laptop, which can be connected alternately to the optical recording devices of the numerous jobs of the textile machine is.

Both the central control unit of the textile machine and a portable tablet or laptop each have a monitor on which the images produced by the optical recording devices can be displayed and thus checked by the operating personnel.

Advantageously, the images of the optical recording devices in the computer device are also analyzed in a yarn-specific manner. That is to say, the computer device checks on the basis of the known yarn data and the images produced by the optical recording devices whether the splicing parameters correspond to the splicing parameters which should be used during the processing of the present yarn section.

The checking and analysis of the yarn data with the recordings of the optical recording devices can take place either constantly or regularly. A review and analysis of the yarn data and the recordings of the optical recording devices is particularly advantageous when a Garnpartiewechsel has taken place, since such a Garnpartiewechsel often can make a correction of the originally set splicing parameters necessary. That is, based on the analysis produced in the computer device, different splice parameters can be optimized if necessary; For example, a correction of the catchment length of the thread ends to be spliced into the splice channel of the splicing prism can take place.

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

Fig.1

schematisch in perspektivischer Ansicht eine Arbeitsstelle einer Kreuzspulen herstellenden Textilmaschine, die einen den Fadenlaufweg umschließenden Fadenleitkanal aufweist, wobei der Fadenleitkanal unter anderem über ein Lagergehäuse verfügt, in das eine Fadenspleißvorrichtung integriert ist, deren ordnungsgemäße Funktion durch eine optische Aufzeichnungseinrichtung überwacht wird,

Fig.2

in einem größeren Maßstab und in Seitenansicht eine in einem Lager-gehäuse eines geschlossenen Fadenleitkanals angeordnete, durch eine optische Aufzeichnungseinrichtung überwachende Fadenspleißvorrichtung, wobei das Lagergehäuse verdeckt hinter einem Rundmagazin der Arbeitsstelle angeordnet ist.

It shows:

Fig.1

schematically in a perspective view of a workstation of a cheese-producing textile machine having a Fadenlaufweg enclosing Fadenleitkanal, the Fadenleitkanal has inter alia a bearing housing, in which a Fadensleißvorrichtung is integrated, the proper function is monitored by an optical recording device,

Fig.2

on a larger scale and in side view arranged in a bearing housing a closed Fadenleitkanals, monitored by an optical recording device yarn splicing device, wherein the bearing housing is hidden behind a circular magazine of the job is arranged.

The FIG. 1 shows schematically, in perspective view, a job 1 of a cross-wound producing textile machine, in the embodiment, a winding unit of a so-called cross-winding machine.

Such cross-winding machines are known to have a variety of such, mostly identical trained jobs 1 on which supply bobbins, usually produced on ring spinning machines spinning cops 2, which have relatively little yarn material, are rewound to large-volume cheeses 5.

The finished cheeses 5 are then transferred by means of a (not shown) automatically operating service unit, for example by means of a so-called cheese change on a machine-spooled cross-bobbin transport device of the cheese and transported from this to a machine end side arranged Spulenverladestation or the like.

For proper supply of jobs 1 with fresh spinning heads 2 such automatic packages often have a logistics facility in the form of a coil and sleeve transport system.

In such a known coil and tube transport system, positioned on transport plates in a vertical orientation, fresh spin cops 2 or empty empty tubes run around. The fresh spinning cops 2 are successively conveyed by means of the bobbin and tube transport system to Abspulstellungen AS arranged in the region of the jobs 1 and rewound there to cheeses 5.

However, instead of a package and tube transport system, the jobs 1 of such automatic packages can each be equipped with a round magazine in which a plurality of spinning cops are then stored. Such circular magazines are constantly refilled manually by the operating personnel.

As in Fig.1 indicated, the fresh, to be spun on a cheese 5 spinning cops 2 are positioned in the work stations 1 each initially in an unwind AS, in the spinning cop 2 a thread 29 is withdrawn, which is subsequently transported in the direction of the winding device 4 of the job 1 ,

The individual jobs 1 of the automatic winder are, as is known, equipped with various Fadenüberwachungs- and treatment facilities that ensure that the thread 29 during the rewinding on thread error out is monitored and detected thread defects are cleaned.

The workstations 1 such automatic packages are equipped for example with a thread tensioner 9 a thread connecting device, preferably in the form of a pneumatically operating yarn splicing device 8, a thread cleaner 10 with an associated thread cutting device, a yarn tension sensor 35 and a winding device 4.

Such work stations 1 may optionally also have a paraffin device (not shown).

The winding devices 4 of these jobs 1 furthermore often have, as shown in the exemplary embodiment, in each case a coil frame 11, which is movably mounted about a pivot axis 30, as well as a cross-coil drive device, for example in the form of a thread guide drum 34, which rotates the cross-wound bobbin frictionally while at the same time ensures that the running on the cheese 5 thread 29 is traversed.

How out Fig.1 Furthermore, it can be seen that between the spinning cop 2 positioned in the unwinding position AS and the winding device 4 there is a yarn guide channel 6 enclosing the path of travel of the yarn 29, which can be acted upon by vacuum when required.

The yarn guide channel 6 is on the input side, for example, equipped with a Abspulhilfseinrichtung 3 in the form of a telescopically designed suction cup. That is, the squeegee is mounted displaceably in the vertical direction by means of a drive device and can be lowered at least partially over the spinning cop 2 if necessary, for example for receiving a thread end.

The Fadenleitkanal 6 has in the direction of yarn F behind the squeegee integrated in the Fadenleitkanal 6 bearing portion 33 for a thread tensioner 9 and then also in the Fadenleitkanal 6 integrated, relatively large bearing housing 18 for a yarn splicer 8, with the yarn ends of a if necessary upper and a lower thread can be spliced again almost the same yarn. Within the bearing housing 18 also holding and Auflöseröhrchen 19, 20 and what in the figures for reasons of clarity are not shown in detail, thread cutting and clamping devices and a Fadenzubringer arranged. By means of these devices, the thread ends to be spliced can be properly prepared.

As can be seen, in the region of the yarn splicing device 8 receiving bearing housing 18 also has an optical recording device 7 is arranged, which via a signal line 23 to a computer device, in the embodiment of Fig.1 to the central control unit 24 of the textile machine, is connected.

The central control unit 24 has, as usual, a monitor 26 on which the images of the optical recording device 7, which is formed for example as a video camera, can be made visible. That is, based on the results of picking up the optical recording device 7, both various parameters of the yarn splicing device 8, such as the length of thread taken into the splicing channel 41 of the splicing prism 39, can be visualized, compared with known yarn data and corrected as needed, as well as by the yarn splicing device 8 created thread splice are monitored.

The yarn guide channel 6 further has bearing portions 32, 31 which are arranged in the direction of thread travel F behind the bearing housing 18 and in which the thread cleaner 10 and the yarn tension sensor 35 are installed.

In the embodiment, the Fadenleitkanal 6 on the output side, a suction head bearing housing 21, on which, for example, limited pivotally, a suction head 22 is arranged.

The suction head bearing housing 21 is connected via a suction port 28, to which a first suction air connection 14 is connected, with a machine-long suction air duct 17 of the automatic cheese winder in connection.

The first suction air pipe 14 is like a second and a third suction air 12 and 13, which connect the receiving housing 18 of the yarn splicing device 8 with the suction air channel 17, for example, via an aperture plate 15, optionally acted upon by negative pressure. That is, the rotatably mounted orifice plate 15 has defined positionable intake ports 16, which, depending on the position, ensure that one or more of the suction air nozzle 12, 13, 14 is pneumatically connected to the suction air duct 17 is / are.

Instead of in Fig.1 shown aperture plate 15 are in connection with the Saugluftstutzen 12, 13, 14, of course, other control devices conceivable. For example, each of the suction air nozzles could also be connected to the suction air channel 17 by a separate valve device or the like.

The Fig.2 As can be seen, within the bearing housing 18, a yarn splicing device 8 and for preparing the yarn ends to be spliced holding and Auflöseröhrchen 19, 20 are arranged.

Within the bearing housing 18 also thread cutting and clamping devices and a Fadenzubringer are arranged, which is not shown for reasons of clarity in the figures.

In the exemplary embodiment, the holding and Auflöseröhrchen 19, 20 also each equipped with an exhaust pipe 25, which opens into the ambient atmosphere 44. The splicing prism 39 of the yarn splicing device 8 is disposed within the bearing housing 18 on an air distributor body 36 and has a pneumatically actuated via a compressed air line 43 splicing channel 41, in which the yarn ends to be spliced of upper and lower thread are positioned during the splicing process.
The splicing prism 39 is also end of its splice channel 41 each equipped with Fadenleitblechen 42, which facilitate proper threading of the yarn ends to be spliced into the splice 41.

As further seen, is in the front wall 27 of the bearing housing 18 through a round magazine 40 of the workstation 1 at least partially covered, an optical recording device 7, for example, a video camera integrated, to which, for example via a signal line 37, temporarily a laptop 38, a tablet or the like can be connected. Like the central control unit of the textile machine, the laptop 38 is also equipped with a monitor 26 on which the images of the optical recording device 7 can be made visible.

As already above in connection with the embodiment of the Fig.1 also described in the laptop 38, an analysis of the recording results of the optical recording device 7 with the known yarn data instead. That is, if necessary, various parameters of the thread splicer 8 are corrected. These parameters to be corrected may be, in addition to the yarn end draw length already mentioned above, for example also the duration and / or the strength of the spliced air blown into the splicing channel 41 of the splicing prism 39 via splice air nozzles.

As a workstation 1, which is equipped with a closed Fadenleitkanal 6, works to transfer after a winding interruption, for example due to a yarn breakage or a controlled thread cleaner cut, the yarn ends of upper and lower thread to create a new thread connection to the Fadensverlißvorrichtung 8, is known and for example in the DE 10 2010 049 515 A1 described in detail.

It is therefore dispensed with a renewed, detailed description of the transfer of the yarn ends to be spliced to the yarn splicing device equipped with a closed Fadenleitkanal 6 job 1.

The yarn ends of the upper and lower threads transferred to the yarn splicing device 8 are threaded inside the bearing housing 18 into thread cutting and clamping devices (not shown) and fixed and cut by them.

Subsequently, a thread feeder (likewise not shown) ensures that the thread ends are pulled into the area of the holding and dissolving tubes 19, 20 and are forced into the holding space by a flow of air in the area of the holding and dissolving tubes 19, 20. and dissolution tubes 19, 20 are sucked.

In the holding and Auflöseröhrchen 19, 20, the yarn ends are then properly prepared and then pulled by the yarn feeder yarn-appropriate in the splicing channel 41 of the splicing prism 39 of the yarn splicing device 8. That is, the thread ends are positioned in the splice channel 41 in opposite orientation with a predetermined overlap.

Afterwards, the actual thread splicing process is carried out and the winding process is restarted.

Both the preparatory operations, as well as the splicing process including the splicing result are monitored by the optical recording device 7, the recording results are made visible to the operator on the monitor 26 of the central control unit 24 of the cheese spreader or the monitor 26 of a temporarily connectable laptop 38.

The invention is of course not limited to the embodiments described above, but could also have other embodiments or equipment variants, without departing from the general inventive concept.

Claims (13)

Workstation (1) of a textile machine producing cross-wound bobbins with a thread guide channel (6) surrounding the thread running path, which extends between a thread feed device, in particular a supply bobbin (2) positioned in the unwinding position (AS), and a winding device (4) of the work station (1) and a plurality of bearing housings and / or bearing sections for installing various yarn treatment and yarn monitoring devices, in particular a yarn splicing device (8),
characterized,
in that the thread guide channel (6) has a monitoring section in the region of at least one bearing housing or bearing section accommodating a thread treatment or thread monitoring device via which monitoring of the thread treatment or thread monitoring device installed in the bearing housing or bearing section by means of a computer device (24, 38). connectable, optical recording device (7) can be realized. Workstation (1) according to claim 1, characterized in that at least the monitoring section of the Fadenleitkanals (6) is transparent, wherein the optical recording device (7) on the monitoring section or spaced thereto can be arranged or arranged. Workstation (1) according to claim 1 or 2, characterized in that the monitoring section forms a receptacle for the optical recording device (7). Workstation (1) according to one of the preceding claims, characterized in that the optical recording device (7) which can be connected to a computer device (24, 38) is arranged in or on the monitoring section in the region of a bearing housing (18) receiving the yarn splicing device (8), with the help of which at least one monitoring of the splicing process and in particular of the work result of the splicing prism (39) of the yarn splicing device (8) can be realized. Workstation (1) according to one of the preceding claims, characterized in that the optical recording device (7) is designed as a video camera. Workstation (1) according to one of the preceding claims, characterized in that the optical recording devices (7) are connected to the central control unit (24) of the textile machine. Workstation (1) according to one of claims 1 to 5, characterized in that alternately a portable laptop (38) can be connected to the optical recording devices (7). Method for operating a workstation (1) according to Claim 4, characterized in that the recordings of the optical recording devices (7) are displayed on a monitor (26) of the computer devices (24, 38) and analyzed in a specific manner in the computer device (24, 38) , A method according to claim 8, characterized in that a constant review and analysis of the recordings of the optical recording devices (7) takes place. A method according to claim 8, characterized in that a regular review and analysis of the recordings of the optical recording devices (7) takes place. A method according to claim 8, characterized in that the recordings of the optical recording devices (7) are checked and analyzed in particular after a Garnpartiewechsel. Method according to one of claims 8 to 11, characterized in that based on the analysis in the computer device (24, 38) carried out an optimization of the splicing parameters. A method according to claim 12, characterized in that the optimization of the splicing parameters comprises, for example, a correction of the length of insertion of the thread ends to be spliced into the splicing channel (41) of the splicing prism (39).

Images