JP2021127249A - Method for doffing yawn package and package doffer - Google Patents

Abstract

To provide a method for doffing a yawn package and a package doffer.SOLUTION: A yawn package wound at several winding positions at a take-up winding device is obtained by a receiving spindle 6 of a package doffer 5 after being wound. Before the yawn package is extruded out from a winding spindle, a loose yarn end of the yawn package is fixed to a peripheral surface of each yawn package by a yawn end fixation device 9 of the package doffer introduced into the take-up winding device, thus a reliable doffing and conveyance of the yawn package are guaranteed. For this, the movable yawn end fixation device 9 which can be guided to reciprocate between a rest position and an operation position to be activated is arranged at a device carrier 8 of the package doffer.SELECTED DRAWING: Figure 1.1

Description

The present invention relates to the method for duffing a thread package according to the premise of claim 1 and the package doffer for receiving and sending a thread package according to claim 7.

In the melt spinning process for producing synthetic yarns, a plurality of synthetic yarns are formed at a large number of spinning positions. At the end of the process, a group of yarns is wound separately at each spinning position to form a yarn package. Therefore, it is common to arrange a plurality of take-up winders side by side along the aisle. Each of the take-up winders winds a plurality of yarns to form a yarn package. The yarn package that has been wound by the take-up winder can be picked up by the portable package doffer and delivered along the aisle. Therefore, for several years, methods and package doffers for duffing yarn packages have been known, for example, from European Patent Application Publication No. 0026471.

In a known method for duffing a thread package, the receiving mandrel of the package doffer is placed directly in front of the take-up take-up spindle, which completes the take-up spindle. Can be received. After the take-up spindle tensioning device is released, the thread package is now extruded from the take-up spindle by the take-up take-up machine extruder and fed to the receiving mandrel of the package doffer. An insulated heating wire is assigned to the receiving mandrel of the package doffer to prevent loose thread ends from hanging from the thread package. The heating wire guides the yarn package through the interior and melts the hanging yarn ends. However, residual yarn is formed here that is randomly formed on each of the peripheral surfaces of the yarn package and, in some cases, is even sucked into the continuous winding process of the take-up winder. In addition, the heating wire is placed in the space around the yarn package, which shortens the loose thread ends in the thread package but remains loose on the thread package.

Therefore, in the prior art, it is also known that the loose yarn end of the yarn package is fixed to the take-up winder by the package doffer before duffing. This type of take-up winder is well known in the prior art and is disclosed, for example, in German Patent Application Publication No. 4413885. In this regard, each of the plurality of take-up take-up machines has an additional auxiliary device for fixing the formed loose yarn end to the peripheral surface of the yarn package after the winding of the yarn package is completed. There is. Therefore, each take-up take-up machine has a complex auxiliary device to allow duffing by the package doffer of the wound yarn package.

Therefore, it is an object of the present invention to improve the general method for duffing yarn packages and the general package doffer to reduce the complexity of the take-up winder equipment. It is to enable reliable duffing of the yarn package from the machine's protruding take-up spindle.

According to the present invention, the object of this is to remove the loose thread ends of the thread package by means of a package doffer thread end fixing device installed in the take-up winder, respectively, before extruding the thread package from the take-up spindle. This is achieved by a method for duffing the yarn package, which is fixed to the peripheral surface of the yarn package.

In the package duffer according to the present invention, the device carrier has a movable thread end fixing device for fixing the loose thread end to the peripheral surface of the thread package, and this thread end fixing device is the device carrier. On the other hand, the purpose is achieved by being able to guide the vehicle to reciprocate between the resting position and the operating position to be operated.

Advantageous improvements of the invention are defined by the features and combinations of features of each dependent claim.

According to the present invention, one is achieved that the yarn package can be reliably duffed from the take-up spindle and the other is that the loose yarn ends can be conveyed without dropping. Further, the operation of separating the loose thread end can be advantageously avoided. A particular advantage of the present invention is that a plurality of conventional take-up winders can be used without additional auxiliary devices for fixing the yarn ends.

The yarn on the peripheral surface of the yarn package during rotation of the take-up spindle to allow the yarn end of the yarn package to be fixed to the take-up spindle immediately after switching the take-up spindle on the take-up take-up machine. It is preferred that a variant of the method is implemented in which the fluid is simultaneously sprayed onto the edge regions. Depending on the fluid, even a protective layer that binds and wraps loose yarn ends can be formed in the yarn package herein. It is also possible to use a liquid adhesive so that the loose thread ends are adhesively bonded to the peripheral surface of the thread package only in the area of the tie-down bead. However, from the viewpoint of further treatment, it is preferable to use a fluid composed of a spinning finish.

For this purpose, the thread end fixing device of the package doffer according to the present invention has a plurality of spray nozzles, and these spray nozzles are arranged at intervals from each other and are connected to the fluid pump and the fluid tank. Has been done. Therefore, all spray nozzles can be operated simultaneously to spray the fluid onto the peripheral surface of the yarn package.

The adhesive action of the fluid can be further enhanced in that the yarn end is pressed against the peripheral surface of the yarn package by one contact pressure roller or a plurality of contact pressure rollers, especially when a spinning finish is used here.

In this regard, the present invention comprises a thread end fixing device having a plurality of freely rotatable contact pressure rollers or one freely rotatable contact pressure roller extending across a spray nozzle, spaced apart from each other. Improvements to such packaged doffers are preferably used. Therefore, it is possible to improve the adhesion of the loose thread end to the peripheral surface of the thread package.

The take-up spindle tensioning device must first be released to allow the thread package to be duffed from the take-up take-up machine take-up spindle. For this purpose, the tubular ram normally arranged on the take-up spindle is displaced by compressed air against the spring force. At this point, it is necessary to transport the compressed air to the take-up spindle. This transfer is usually carried out by a rotary transfer device of a take-up winder. In this regard, an improvement in the method according to the invention, which initiates relaxation of the tensioning device of the take-up spindle by transporting compressed air from the package doffer to the take-up spindle prior to receiving the yarn package. An alternative solution for the purposes of the present invention is shown.

Therefore, it is possible to eliminate a plurality of rotary transfer devices of the take-up winder. The compressed air required to relax the tensioning device can be provided directly by the package doffer at each take-up spindle of the take-up take-up machine.

For this purpose, in the package dougher according to the present invention, a compressed air reservoir to which a movable compressed air adapter is connected is arranged in an apparatus carrier, and the compressed air adapter is used to wind up a take-up winder. It can be selectively connected to the compressed air connector of the take-up spindle of one of the spindles. Here, the compressed air reservoir can have a volume of compressed air that allows the tensioning devices of the plurality of take-up spindles to relax.

Further, in order to push out the thread package from the take-up spindle, a pull-out device for the package doffer is introduced into the take-up spindle, and the pull-out device can push and move the thread package on the peripheral surface of the take-up spindle. Depending on the modified form, the stress release of the take-up winder at the time of duffing the thread package can be carried out. Therefore, any collaboration between the package doffer controller and the take-up winder controller for duffing the yarn package is minimized. The yarn package can be duffed from the take-up spindle only by the operation of the package doffer from the dormant position of the take-up spindle without the take-up take-up machine being involved by the auxiliary device. A further advantage is that the relaxation of the tube and the withdrawal of the tube can be performed immediately and continuously by the controller device of the package doffer, so that the switching time can be relatively short.

To this end, the package doffer has a pull-out device in which the device carrier is movable, and the pull-out device reciprocates parallel to the receiving mandrel to a protruding pull-out position in order to obtain the yarn package. A pulling device can be used in an improvement of the invention that is navigable to move and has at least one thrusting means for guiding the yarn package in one of the take-up spindles. preferable.

This feature of the package doffer can be further enhanced in that prior to this feature, the wound yarn package is shielded from the newly wound yarn package. For this purpose, a movable shielding unit can be used in the device carrier. The shielding unit is extruded between the take-up spindle verbs of the take-up take-up machine after spindle switching. The shielding unit is retracted from the take-up winder as the yarn package is pulled out of the take-up spindle.

Residual yarn and lint are generated during spindle switching or winding, but the yarn package was pulled out to remove these residual yarn and lint from the take-up spindle after the yarn package was duffed. Later, a modified form of this method, in which a package doffer cleaning device is introduced into the take-up take-up machine parallel to the take-up spindle, is particularly advantageous. Therefore, the residual yarn can be removed mechanically by brushing or non-contact by blowing from the peripheral surface of the take-up spindle.

To this end, the device carrier has a movable cleaning device that can guide the device carrier to reciprocate between a dormant position and an operating position, which is a take-up take-up winding device. It has at least one cleaning means for removing residual yarn on the peripheral surface of one of the take-up spindles of the machine. Therefore, each take-up spindle of the take-up take-up machine can be cleaned before receiving a new take-up tube.

The method according to the invention for duffing a yarn package will be described in more detail below with reference to the accompanying drawings by way of exemplary embodiments of the package doffer according to the invention.

It is a schematic side view of the exemplary embodiment of the package doffer according to the present invention. FIG. 3 is a schematic side view of an exemplary embodiment of FIG. 1.1 used in front of a take-up winder. It is a schematic front view of the exemplary embodiment shown in FIG. 1.1. It is a schematic plan view of the thread fixing device of the exemplary embodiment of FIGS. 1.1 and 2. FIG. 3 is a schematic plan view of an alternative exemplary embodiment of the thread end fixing device shown in FIG. 3.1. FIG. 5 is a schematic cross-sectional view of the compressed air adapter of the exemplary embodiment shown in FIGS. 1.1 and 2. It is a schematic side view of the exemplary embodiment shown in FIG. 1.1 used in a take-up winder. It is a schematic side view of the exemplary embodiment shown in FIG. 1.1 used in a take-up winder. It is a schematic diagram of a part of the cleaning apparatus of an exemplary embodiment shown in FIG. 1.1.

A first exemplary embodiment of a packaged duffer according to the present invention is schematically shown in the plurality of figures of FIGS. 1.1 and 2. FIG. 1.1 shows an exemplary embodiment in a side view, and this exemplary embodiment is shown in a front view in FIG. Unless you explicitly refer to one of the figures, the detailed description below applies to both figures.

An exemplary embodiment of the package doffer in these figures and in the following figures is identified by reference numeral 5. The package doffer 5 has a portable device carrier 8. The portable device carrier 8 is self-driven and remotely controlled by a drive device (not shown here). A protruding receiving mandrel 6 is arranged on the device carrier 8. The receiving mandrel 6 of this exemplary embodiment is held by the device carrier 8 by a height-adjustable slide 17. The receiving mandrel 6 has a hollow cylindrical shape and is configured to have a compressed air adapter 12 at its free end. The compressed air adapter 12 is connected to the compressed air reservoir 10 by an internal compressed air line 11. The compressed air reservoir 10 is arranged on the device carrier 8 and is shown by a broken line in FIG. 1.1. The compressed air line 11 and the compressed air adapter 12 are also shown by broken lines in FIG. 1.1. The function of the compressed air adapter 12 provided at the free end of the receiving mandrel 6 will be described below.

The thread end fixing device 9, the drawing device 15, and the cleaning device 16 are held in the device carrier side by side of the receiving mandrel 6. The configurations and functions of the additional devices provided on the device carrier 8 will continue to be described below.

The thread end fixing device 9 has a thrust actuator 9.2, and the thread end fixing device 9 is operated by the thrust actuator 9.2 in a resting position (as shown in FIG. 1.1). It can be guided to reciprocate to and from the position. The thrust actuator 9.2 is fixedly connected to a holder 9.1 in which a plurality of spray nozzles 9.3 are held. The spray nozzles 9.3 are arranged on the holder 9.1 in a predetermined number at a predetermined distance from each other with respect to the thrust actuator 9.2. The distance between the spray nozzles 9.3 and the number of spray nozzles 9.3 on the holder 9.1 are selected according to the pitch of the take-up winder and the number of winding positions. The thread package at the take-up position is acquired by the package doffer 5.

FIG. 3.1 will be further referred to for further explaining the thread end fixing device 9. The thread end fixing device 9 is schematically shown in the plan view of FIG. 3.1. As can be seen from FIG. 3.1, the spray nozzles 9.3 are arranged adjacent to each other on the holder 9.1 and are collectively connected to the metering pump 9.5. The metering pump 9.5 is connected to the tank 9.6. The tank 9.6 and the metering pump 9.5 are held in holder 9.1 in this exemplary embodiment. However, basically, the tank 9.6 or the tank 9.6 and the metering pump 9.5 are arranged in the apparatus carrier 8, and the tank 9.6 is flexibly arranged in the metering pump 9.5 or the spray nozzle 9.6. There is also the possibility of connecting by sex lines.

As can be seen from FIG. 3.1, the spray nozzle 9.3 is assigned to the contact pressure roller 9.4. The contact pressure roller 9.4 is freely rotatable on the holder 9.1 and is mounted so as to extend over all spray nozzles 9.3.

FIG. 1.2 is additionally referred to for explaining the function of the thread end fixing device 9. An exemplary embodiment of the package doffer of FIG. 1.1 is shown in FIG. 1.2 in a state of operating on the take-up winder 1. The take-up take-up machine 1 has a plurality of take-up positions 1.1 to 1.5 in order to wind a plurality of yarns at the same time to form a yarn package. For this purpose, the take-up winder 1 has two protruding take-up spindles 2.1 and 2.2. These take-up spindles 2.1 and 2.2 are held by the take-up turret 3. The take-up spindles 2.1 and 2.2 and the take-up turret 3 are driven by the drive device 4. This type of take-up winder is well known in the prior art and will not be described further here.

During operation, the thread package 7 is alternately wound around the peripheral surfaces of the take-up spindles 2.1 and 2.2. When the yarn package 7 reaches a predetermined final diameter, the take-up spindles 2.1 and 2.2 are swiveled by the take-up turret 3 and guided alternately to the operating region and the switching region. In the situation shown in FIG. 1.2, the take-up spindle 2.1 is located in the switching region. Therefore, the thread package 7 on the take-up spindle 2.1 is prepared for duffing by the package doffer 5. In the illustrated operating conditions, the yarn has already been cut between the take-up spindles 2.1 and 2.2 so that one loose yarn end is located at each of the take-up completed yarn packages 7. doing.

In order to enable the thread package 7 to be duffed from the take-up spindle 2.1, the package doffer 5 has a free end of the take-up spindle 2.1 and a free end of the receiving mandrel 6 at short intervals from each other. It is arranged in front of the take-up winder 1 so as to face each other. When the package doffer 5 reaches this position, the thread end fixing device 9 of the device carrier 8 is activated. The thrust actuator 9.2 guides the holder 9.1 having the spray nozzle 9.3 to the take-up winder 1, that is, from the rest position to the operating position. In the thread end fixing device 9 in the operating position, one spray nozzle 9.3 is assigned to each of the thread packages 7, and the contact pressure roller 9.4 is arranged so as to be supported by the peripheral surface of the thread package 7. There is. Here, the take-up spindle 2.1 is decelerated. During this procedure, the spray nozzle 9.3 is actuated, whereby the fluid is sprayed by the metering pump 9.5 through the spray nozzle 9.3 onto the surface of the thread package 7. Depending on the fluid and the spray nozzle 9.3, only the restraining beads on the entire shelf face or the peripheral surface of the thread package 7 can be wetted. The thread end of the thread package 7 can be fixed to the shelf surface of the thread package 7 by a contact pressure roller 9.4 supported on the shelf surface. As the fluid, a spinning finish is preferably used. However, basically, there is a possibility of using an adhesive fluid that improves the effect of fixing the loose thread end to the thread package 7.

The operating status of the thread end fixing device 9 in FIG. 3.1 is emphasized by the thread package 7 plotted by the broken line. Here, a contact pressure roller 9.4 extends over all winding positions or thread packages 7, respectively. However, basically, there is a possibility that the loose thread end is directly fixed to the peripheral surface of the thread package inside the restraining bead. To this end, an alternative exemplary embodiment of the thread end fixing device 9 is shown in FIG. 3.2.

In the exemplary embodiment of the thread end fixing device 9 shown in FIG. 3.2, a plurality of contact pressure rollers 9.4 are held so as to be freely rotatably attached to the holder 9.1. Here, one contact pressure roller 9.4 is assigned to each spray nozzle 9.3. The contact pressure roller 9.4 extends only over the sub-region (small area) of the yarn package 7 indicated by the dashed line, which allows the loose yarn end to be secured in the region of the restraining bead. ..

When the loose thread end of the thread package 7 to be duffed is fixed, the thread end fixing device 9 of the device carrier 8 of the package duffer 5 is returned to the rest position. When the take-up spindle 2.1 of the take-up take-up machine 1 is completely decelerated, the compressed air adapter 12 establishes a connection of compressed air to the take-up spindle 2.1. This situation is schematically shown in FIG.

A portion of the freely protruding end of the take-up spindle 2.1 and the receiving mandrel 6 is shown in FIG. The compressed air adapter 12 is movably arranged in the receiving mandrel 6 and is connected to the adjusting actuator 13. The compressed air adapter 12 is led out by the adjusting actuator 13 and can be introduced into the compressed air connector 14 provided at the free end of the take-up spindle 2.1. Here, compressed air is supplied to the inside of the take-up spindle 2.1 by a control valve and introduced. The control valve is not shown here and is disposed in the compressed air reservoir 10. For example, a tensioning device known from European Patent No. 2523884 is configured within the take-up spindle 2.1. This point will not be further explained here, but the cited literature will be referred to. The tension mechanism of the tensioning device is released due to the compressed air in the take-up spindle 2.1, and the winding tube 7.1 of the yarn package 7 can be duffed from the peripheral surface of the take-up spindle 2.1. Here, the extraction device 15 of the package doffer 5 is operated.

As shown in FIGS. 1.1 and 2, the drawing device 15 has thrust means 15.1. The thrust means 15.1 can be guided to reciprocate between a stationary position and an operating position by a thrust actuator 15.2. Here, the thrust means 15.1 can swivel with respect to the thrust actuator 15.2, which allows the thread package 7 to be pulled out of the take-up spindle 2.1 by a thrust fork, for example.

A situation in which the drawing device 15 is actuated to allow the thread package 7 to be pulled out of the take-up spindle 2.1 is shown in FIG. For this purpose, the thrust means 15.1 is guided by the thrust actuator 15.2 so that the thread package is continuously led out from the take-up spindle 2.1 to the receiving mandrel 6. When the last thread package 7 is held by the receiving mandrel 6, the pulling device 15 is guided to return to the stationary position of the pulling device 15 in the device carrier 8. For this purpose, the thrust means 15.1 is swiveled.

The cleaning device 16 of the device carrier 8 is activated here to prepare the take-up spindle 2.1 to be able to receive the new winding tube. As can be seen from FIGS. 1.1 and 2, the cleaning device 16 includes a cleaning means 16.1 and an indexing actuator 16.2. For operation, the cleaning means 16.1 can be moved from the stationary position to the take-up winder 1 by the indexing actuator 16.2.

6 and 7 are further referenced to further illustrate the cleaning device 16. A side view of an exemplary embodiment of the package doffer 5 and the take-up winder 1 is shown in FIG. A portion of the take-up spindle 2.1 is shown schematically in FIG. 7 along with the cleaning means 16.1. In this regard, the following description refers to all figures.

In particular, as can be seen from the figure of FIG. 7, the cleaning means 16.1 of this exemplary embodiment is formed by a brush 16.3 pressed against the peripheral surface of the take-up spindle 2.1. The brush 16.3 is continuously guided by the indexing actuator 16.2 over the entire length of the take-up spindle, thereby removing lint and residual yarn from the peripheral surface of the take-up spindle. The take-up spindle 2.1 of the take-up take-up machine 1 is rotationally driven here at a low speed.

Embodiments of the cleaning device 16 are similarly exemplary. Basically, the cleaning means 16.1 may also have one compressed air nozzle or a plurality of compressed air nozzles, for example, to blow off residual yarn and lint on the peripheral surface of the take-up spindle.

The structural embodiments of the additional device of the package doffer 5 shown in the exemplary embodiments shown in FIGS. 1.1 and 2 are only exemplary. The possibility that the package doffer according to the invention undertakes additional functions that would normally be performed by an auxiliary device provided in the take-up winder is essential for the method according to the invention. For example, instead of a spray nozzle, the thread end fixing device can have a label dispenser to provide a label that is adhesively bonded to the peripheral surface of the thread package to fix the loose thread end. The packaged duffer compressed air carrier is particularly advantageous. This compressed air transfer device controls the supply of compressed air to the take-up spindle in order to relax the tension device. Therefore, it is possible to eliminate the complicated rotating conduit in the take-up winder. Further, the thread package on the peripheral surface of the take-up spindle is released only after the package doffer is placed. It is unlikely that the thread package will be released prematurely. The apparatus for transporting the compressed air of the exemplary embodiment illustrated with respect to FIGS. 1.1 and 2 is similarly exemplary.

The package doffer 5 according to FIGS. 1.1 and 2 may include a movable shielding unit. As an additional device, the shielding unit is extruded between the take-up take-up spindles of the take-up take-up machine during the switching phase or when duffing the thread package 7. Therefore, it is possible to prevent the loose yarn end from being drawn into the first layer of the newly wound yarn package. Therefore, the auxiliary cloaking device in the take-up winder can be eliminated.

Claims (12)

A method for duffing a yarn package, the yarn package is wound on a protruding take-up spindle of a take-up take-up machine having a plurality of take-up positions, and the take-up yarn package is packaged as a package doffer. In the way it is received by the receiving mandrel
Before extruding the yarn package from the take-up spindle, the loose yarn ends of the yarn package are removed from each of the yarn packages by a yarn end fixing device of the package doffer introduced into the take-up take-up machine. A method characterized by fixing to a peripheral surface. The method according to claim 1, wherein a fluid is sprayed on the region of the yarn end on the peripheral surface of the yarn package during the rotation of the take-up spindle. The method according to claim 2, wherein the yarn end is pressed against the peripheral surface of the yarn package by one contact pressure roller or a plurality of contact pressure rollers. The premise of claim 1, wherein the tension device of the take-up spindle is started to relax by transporting compressed air from the package doffer to the take-up spindle before receiving the thread package. Alternatively, the method according to any one of claims 1 to 3. In order to push the thread package out of the take-up spindle, a drawing device of the package doffer is introduced into the take-up take-up machine in parallel with the take-up spindle, and the thread package is wound by the drawing device. The method according to any one of claims 1 to 4, characterized in that it can be pushed and moved on the peripheral surface of the take spindle. Any one of claims 1 to 5, wherein after the thread package is pulled out, a cleaning device for the package doffer is introduced into the take-up take-up machine in parallel with the take-up spindle. The method described in the section. A package doffer for receiving and delivering a yarn package (7) held by a plurality of winding spindles (2.1, 2.2) that are significantly projected from the take-up winder (1). In a package duffer, which has a movable device carrier (8), wherein the device carrier (8) holds at least one receiving mandrel (6) for receiving the thread package (7).
The device carrier (8) has a movable thread end fixing device (9) for fixing a loose thread end to the peripheral surface of the thread package (7), and the thread end fixing device (9) Is a package doffer, characterized in that it can guide the device carrier (8) to reciprocate between a resting position and an operated operating position. The thread end fixing device (9) has a plurality of spray nozzles (9.3), and the spray nozzles (9.3) are arranged at intervals from each other, and the fluid tank (9.6) is provided. 7. The packaged duffer according to claim 7, characterized in that it is connected to a fluid pump (9.5). The thread end fixing device (9) is freely rotating so as to extend across a plurality of contact pressure rollers (9.4) or the spray nozzle (9.3) which are freely rotatable at intervals from each other. The package duffer according to claim 7 or 8, characterized in that it has one possible elongated contact pressure roller (9.4). A compressed air reservoir (10) connected to a movable compressed air adapter (12) is arranged on the apparatus carrier (8), and the compressed air adapter (12) is the take-up spindle (2.1). , 2.2), or any of claims 7 to 9, characterized in that it can be selectively connected to the compressed air connector (14) of the take-up spindle. Package doffa described in item 1. The device carrier (8) has a movable pull-out device (15), and the pull-out device (15) is moved to a protruding pull-out position in order to acquire the thread package (7). It can be guided to reciprocate in parallel with 6), and the drawing device (15) is at least for guiding the yarn package in one of the take-up spindles (7). The package duffer according to claim 7 or 10, characterized in that it has one thrust means (15.1). The device carrier (8) has a movable cleaning device (16) that can guide the device carrier (8) to reciprocate between a rest position and an operating position, and the cleaning device. (16) has at least one cleaning means (16.1) for removing residual yarn on the peripheral surface of one of the take-up spindles (2.1, 2.2). The package doffer according to claim 7 or 10, characterized in that.

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