CN113994033A

CN113994033A - Melt spinning apparatus

Info

Publication number: CN113994033A
Application number: CN202080043962.9A
Authority: CN
Inventors: B·马梅罗
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2019-06-19
Filing date: 2020-06-05
Publication date: 2022-01-28
Anticipated expiration: 2040-06-05
Also published as: CN113994033B; DE102019004354A1; WO2020254124A1

Abstract

The invention relates to a melt spinning device for producing synthetic threads, having a plurality of spinning positions. Each spinning position has a spinning device, a godet device and a winding device. An automatic handling device is provided for splicing the threads in the spinning positions, which can be moved on guides to aligned spinning positions for splicing the threads, wherein each spinning position is assigned a connecting station for delivering compressed air. The connecting station can be selectively coupled to a clutch device that can be moved on the automatic operating device. In order to achieve a quick and safe engagement, the coupling stations are arranged to be stationary in the movement path of the robot, so that the clutch device can be engaged to one of the coupling stations as a result of the traveling movement of the robot.

Description

Melt spinning apparatus

The invention relates to a melt spinning device for producing synthetic threads according to the preamble of claim 1.

Melt spinning devices of this type for producing synthetic threads are known, for example, from DE102017003189a 1.

The melt spinning apparatus has a plurality of spinning stations at each of which a group of filaments is extruded, cooled, oriented and wound from a polymer melt to form a package. In this connection, each spinning position has a spinning device, a godet device and a winding device. The thread groups in the spinning position are drawn off from the spinning device by the godet device after extrusion and cooling and are fed to a winding device. In order to be able to connect the thread groups at the godets of the godet unit and in the winding position of the winding device at the start of the process or after a process interruption in the spinning position, known melt spinning devices have an automatic operating device which guides the suction jet by means of a robot arm. The group of wires can be received by means of a suction jet and guided for joining by a robot arm. In order to allow automatic guidance of the thread groups in this way, each spinning position has a connecting station which interacts with a clutch device of the automatic handling device for the purpose of conveying the compressed holes and discharging the waste thread. Here, the automation device is required to approach a defined stop position assigned to the spinning position in each spinning position. The known melt spinning apparatus therefore has a locking device for securing the automatic handling device in each spinning position. Once the automatic operating device has been fixed, the clutch device is engaged to the respective connecting station. In this connection, the connecting station is arranged laterally adjacent to the guide means on which the robot is guided.

In the known melt spinning apparatus, the stop position of the automatic operating device must be approached precisely to allow a perfect flawless connection between the connection station and the clutch device.

The object of the invention is now to improve a melt spinning device of this type for producing synthetic threads in such a way that the desired rapid and precise engagement between the joining station and the coupling device becomes possible.

According to the invention, this object is achieved in that the connection stations are arranged to be stationary in the movement trajectory of the robot, so that the clutch device can be engaged to one of said connection stations as a result of the moving movement of the robot.

Advantageous developments of the invention are defined by the features and combinations of features of the dependent claims.

The invention has the particular advantage that the displacement movement of the robot and thus the drive of the robot can be used to establish a connection between the connection station and the coupling device. In this connection, the approach to the spinning position by the automatic handling device and the engagement between the connecting station and the clutch device can take place simultaneously. The stop position of the automatic operating device is predetermined by the connecting station. Additional means for connecting the coupling station to the clutch device can be dispensed with.

In order that the displacement movement of the robot is not impeded by the connecting station, the development of the invention is particularly advantageous in that the coupling device is designed to be adjustable transversely to the movement path of the robot between a displacement position and an engagement position, wherein the coupling device together with the robot in the displacement position can be freely guided on the movement path. Thus, the mobility of the robot is ensured despite the connection station being arranged in this movement path.

A development of the invention in which the coupling station and the coupling device are arranged in an engagement plane parallel to the movement path of the robot is characterized in that the displacement movement of the robot can be used directly for horizontally engaging the coupling station to the coupling device.

The connection between the docking stations and the coupling device can then be further facilitated in that, in an advantageous development, the docking stations each have a plug connection piece, and the coupling device has a plug adapter, which is opposite the plug connection piece.

Undesired collisions in the engagement plane can be avoided in a simple manner by the clutch device being held on a movable carriage, which is guided in the engagement plane by a carriage drive. The carriage is therefore positioned together with the clutch device in the respective desired position in a freely movable or engageable manner by the carriage drive. Thus, a reliable guide mechanism saving a lot of space can be obtained.

In order to be able to carry out the unwinding of the winding bobbins independently of the respective position of the robot, it is further provided that the guide device is formed by a suspension rail on which the robot is guided and that the connecting station is arranged between the guide rails of the suspension rail.

In order to be able to achieve a desired soft engagement between the coupling station and the clutch device, the following development of the invention is preferably implemented, in which the drive device of the robot has a controllable drive motor, by means of which the slower creep speed of the robot can be adjusted, at least in addition to the displacement speed. Engagement movements in the form of shocks (shock) can then advantageously be avoided.

Furthermore, the following development of the invention has proven successful when the spinning positions are arranged next to one another to form a plurality of very long machine sides, wherein the automatic handling device has a piecing robot and a supply unit with a waste thread container, wherein the supply unit is connected to the coupling device for the transmission of compressed air. The waste wire can then be stored directly on the automatic handling device. Thus, the discharge of waste wire through the connection station and the discharge of the air flow by means of the long duct associated with the waste wire can advantageously be avoided.

Suction jets connected to the supply unit by means of a compressed air line and a waste line are provided for treating the thread groups for the purpose of joining the latter. This results in a short distance for guiding the waste thread to the waste thread container.

The flexibility for guiding the suction jet is ensured by a controllable robot arm of the joint robot, which usually has multiple degrees of freedom and precisely guides the suction jet to splice the threads according to a predetermined control program.

The melt spinning apparatus according to the invention is particularly suitable for carrying out fully automated production of synthetic threads. The operational complexity of the operator is significantly reduced and essentially consists of only supervision functions and maintenance work.

A melt spinning apparatus according to the invention will be explained in more detail below by way of example and with reference to the accompanying drawings, in which:

FIG. 1 is a schematic front view of a plurality of spinning positions and automated handling equipment of a melt spinning apparatus of the present invention;

fig. 2.1 and 2.2 show a plan view of the robot of fig. 1 in a plurality of operating states; and

FIG. 3 schematically shows a side view of one of the spinning positions of the melt spinning apparatus of the present invention according to FIG. 1.

An embodiment of a melt spinning apparatus according to the present invention has a plurality of spinning positions shown in front and side views in FIGS. 1 and 3. Unless specifically mentioned with respect to one of the figures, the following description applies to both figures.

An embodiment of a melt spinning apparatus according to the invention has a plurality of spinning stations 1.1-1.3, which are arranged in a row next to one another, forming the machine longitudinal sides. The number of spinning positions shown in fig. 1 is merely exemplary. In principle, such melt spinning apparatuses comprise a plurality of spinning stations of the same type.

The spinning positions 1.1-1.3 shown in fig. 1 have the same embodiment in terms of their structure and will be explained in more detail at the spinning position 1.1 shown in fig. 3.

As can be seen from the illustration in fig. 3, each spinning position 1.1-1.3, in this case the spinning position 1.1, has a spinning device 2. The spinning device 2 comprises a spinning beam 2.2, which supports a plurality of spinning nozzles 2.1 on the underside. The spinning nozzles 2.1 are coupled to a spinning pump 2.3, which is preferably designed as a multi-pump and is connected to each spinning nozzle 2.1. The spinning pump 2.3 is connected to an extruder or other melt source (not shown here) by a supply melt 2.4.

A cooling duct 2.5, which is connected to the blowing chamber 2.6 by means of an air-permeable wall, is connected to the spinning beam below the spinning beam 2.2. The cooling duct 2.5 is implemented cylindrically and is arranged concentrically with the spinning nozzle 2.1. The filaments extruded through the spinning nozzle 2.1 can then be cooled in the cooling duct 2.5 by means of temperature and humidity-controlled air supplied from the blowing chamber 2.6.

A collective thread guide 3, which combines a number of filaments to form a thread, is arranged below the cooling duct 2.5. In this embodiment, the spinning device 2 produces a total of four threads per spinning position. The number of filaments produced at each spinning position is exemplary. Such a spinning device can simultaneously produce up to 32 threads at each spinning position.

The threads produced in the spinning position as thread groups 7 are drawn off from the spinning device 2 by the godet device 5. The threads of the thread group 7 are moved through the spin finish apparatus 4 in order to wet the threads. In this embodiment, the godet unit 5 is provided by two driven godets 5.1. An entanglement unit 5.2 for individually entangling the threads of the thread groups 7 is arranged between the godet rolls 5.1.

The threads of the thread group 7 are wound at the end of the process to form a bobbin. For this purpose, a winding device 6 is provided, which has a winding position 6.4 for each thread of the thread group 7. A total of four winding positions 6.4 extend along the winding spindle 6.1, which is held projecting on the winding turret 6.2. The winding turret 6.2 supports two winding spindles 6.1, which are guided in an alternating manner in the winding area and the change area. Each winding position 6.4 is assigned one of several deflection rollers 6.6 for dividing and separating the thread groups 7, which are arranged directly downstream of the godet unit 5. Each winding position 6.4 for winding and displacing the thread to form a bobbin has one traversing unit 6.3. The traversing unit 6.3 interacts with a contact pressure roller 6.5, which is arranged parallel to the winding spindle 6.1 and is rotatably mounted on the machine frame. The contact pressure roller 6.5 bears on the surface of the bobbin 23, while the thread is being wound to form a bobbin.

In fig. 1 and 3, the spinning positions 1.1 to 1.3 are in their normal operation, in which a thread group 7 of a plurality of threads is extruded, drawn off and continuously wound at each spinning position 1.1 to 1.3 to form a bobbin 23.

In order to be able to operate the spinning positions 1.1 to 1.3 at the start of the process or at a process interruption, the spinning positions 1.1 to 1.3 are assigned to an automatic operating device 8. In fig. 1 and 3, the robot 8 is shown in a waiting position. The robot 8 is guided in a guide 17 parallel to the longitudinal side of the machine. The guide means 17 is designed in this embodiment as a suspension rail 17.1, which in this embodiment has two guide rails 17.2. The guide rails 17.2 extend above the operator corridor parallel to the machine longitudinal sides of the spinning positions 1.1-1.3. The robot 8 has a drive 8.1 by means of which the robot is repositioned along the guide 17.2. For this purpose, the drive device 8.1 has a controllable drive motor 8.2. The drive motor 8.2 is connected to the robot controller 21. The robot controller 21 is connected to a machine controller 22 (shown in fig. 1).

The automatic handling device 8 has in this embodiment a joint robot 8.4 and a supply unit 8.3, both of which are held on the underside of the drive device 8.1. The supply unit 8.3 houses a waste container 9. The waste wire unit 9 has an adjustable waste flap 9.1 on the underside, which can be opened in order to empty the waste wire receptacle 9.

The joint robot 8.4 of the robot 8 has a controllable robot arm 10. The robot arm 10 has a suction jet 11 and a cutting device 24 at the leading end, which protrudes freely. The protruding multi-jointed robot arm 10 is freely movable by means of actuators and sensors as shown in more detail here, wherein the sequence of actions of the robot arm 10 is controlled by a robot controller 21. The supply of power to the automatic operating device 8 preferably takes place via a busbar or via an energy link.

For operating the suction jet 11, the automatic actuating device 8 has a coupling device 8.5, which is connected to the supply unit 8.3 by means of a supply line 25. The clutch device 8.5 is arranged on the upper side of the automatic operating device 8. The clutch device 8.5 can be coupled to a plurality of connection stations 14.1-14.3. The connecting stations 14.1 to 14.3 are assigned to the spinning positions 1.1 to 1.3, as can be seen from the illustration in fig. 1. At each connection station 14.1-14.3 a compressed air connection is provided which is supplied by means of a central compressed air line 18.

The robot 8 is held in the waiting position in fig. 1 and 3, in which no compressed air is supplied. The engagement action between the clutch device 8.5 and one of the connection stations 14.1, 14.3 is explained below with reference to fig. 2.1 and 2.2.

The upper side of the automatic handling device 8 is in different operating states as schematically shown in fig. 2.1 and 2.2. In this regard, the following description applies to both figures unless specifically mentioned to any one of them.

Fig. 2.1 shows the situation of the robot 8 moving along the motion trajectory defined by the guide rails 17.2 of the suspension rails 17.1. The movement trajectory of the robot is also indicated by the arrow. The clutch device 8.5 is arranged on the movable carriage 19. The carriage 19 can be guided in a carriage guide 19.1 in the transverse direction of the guide rails 17.2 of the suspension rails 17.1. The carriage 19 together with the clutch device 8.5 is selectively guided back and forth between a displacement position and an engagement position by a carriage drive device 20. The clutch device 8.5 is in the moved position in fig. 2.1. In this case, the automatic handling device 8 can be moved freely along the spinning positions 1.1-1.3 by means of the drive device 8.1.

For being supplied with compressed air, each spinning position has a connecting station 14.1-14.3. The joining stations 14.1-14.3 are arranged between the guide rails 17.2 of the suspension rails 17.1. In this embodiment, the joining stations 14.1-14.3 are each held on one side on one of the guide rails 17.2 by a bracket 26. The coupling stations 14.1-14.3 and the coupling device 8.5 are arranged in an engagement plane which extends above the guide rail 17.2 of the suspension rail 17.1 in a parallel manner to said guide rail 17.2. The docking stations 14.1 to 14.3 each have a plug connection 15 which can be combined with a plug adapter 16 of the coupling device 8.5.

In order to supply the supply unit 8.3 with compressed air, the clutch device 8.5 is initially guided into the engaged position by the carriage drive 20. The clutch device 8.5 is seated flush with the connection station 14.1 in the engaged position.

As fig. 2.2 shows, the clutch device 8.5 can be connected to the connecting station 14.1 in an automatic manner when the automatic operating device 8 continues its displacing movement. The plug adapter 16 of the coupling device 8.5 is plugged into the plug connection 15 of the docking station 14.1. This is shown in fig. 2.2. Once the engagement sequence between the clutching device 8.5 and the connecting station 14.1 has been completed, the drive motor 8.2 of the drive unit 8.1 is stopped, decelerating the drive device 8.1. Since the connecting stations are arranged stationary in the movement path of the automatic operating device 8, the clutch device can be coupled to the respective connecting station by a simple movement of the automatic operating device 8. For this purpose, the drive motor 8.2 of the drive device 8.1 can be controlled at different speed levels. The joining process is then preferably carried out at a comparatively slow travel speed of the robot 8. However, in order to access one of the spinning positions 1.1 to 1.3, the robot 8 can be guided by the drive 8.1 at a predetermined, faster speed of movement.

As can be seen from the illustrations in fig. 1 and 3, the suction jet 11 is supplied with compressed air via a compressed air line 12 from the supply unit 8.3. For this purpose, the supply unit 8.3 is connected to a clutch device 8.5. The waste thread accumulated while the thread group 7 is guided by the suction ejector 11 is directly supplied to the waste thread container 9 through the waste line 13. The function and structure of such a waste container is known, for example, from WO2019007645a1, and reference is therefore made to the documents cited therein, without further explanation.

As soon as the joining robot 8.4 has joined the thread groups in the winding position 6.4 of the godet unit 5 and the winding unit 6 at the start of the process or in the event of a process interruption, the clutch device 8.5 can be disengaged from the respective connecting station 14.1. For this purpose, a displacement movement of the robot 8 in the opposite direction along the movement path of the robot 8 is initiated. Once the clutch device 8.5 has been disengaged from the respective connecting station 14.1, the clutch device 8.5 is guided to a displacement position on the upper side of the automatic operating device 8. The robot 8 can now move freely on the suspension rail 17.1 and can be guided along this path of movement in a forward or reverse movement by the drive 8.1.

This embodiment is to be regarded here as an example only in terms of the structure of the coupling station 14.1 and of the coupling device 8.5 as shown in fig. 1 to 3. What is important for the melt spinning installation according to the invention is the course of the displacement movement between the clutch device 8.5 and one of the connecting stations by means of the automation device 8. Additional means for engaging the coupling device 8.5 to the coupling stations 14.1-14.3 can then be avoided. In addition, installation spaces limited to the guide device 17 can be used to realize the compressed air supply on the automatic handling device 8 in each spinning position.

In principle, it should be mentioned here that the coupling stations in the spinning positions 1.1-1.3 and the clutch device of the automatic handling device 8 can also be used to guide the waste thread to the central container.

Claims

1. A melt spinning apparatus for producing synthetic threads, having an automatic handling device (8) and a plurality of spinning stations (1.1-1.3), the spinning stations (1.1-1.3) each having a spinning device (2), a godet device (5) and a winding device (6), the automatic handling device (8) being guidable on a guide device (17) to the spinning stations (1.1-1.3) arranged in a row for splicing threads, wherein each spinning station (1.1-1.3) is assigned a connecting station (14.1-14.3), which connecting station (14.1-14.3) can be selectively coupled to a coupling device (8.5) for delivering compressed air, and wherein the coupling device (8.5) is arranged so as to be movable on the automatic handling device (8), characterized in that, the connecting stations (14.1-14.3) are arranged to be stationary in the movement path of the robot (8), so that the coupling device (8.5) can be coupled to one of the connecting stations (14.1-14.3) due to the traveling movement of the robot (8).

2. A melt spinning apparatus according to claim 1, characterised in that the clutch device (8.5) is designed to be adjustable transversely to the movement trajectory of the automatic operating device (8) between a moved position and an engaged position, wherein the clutch device (8.5) in the moved position together with the automatic operating device (8) can be freely guided on the movement trajectory.

3. A melt spinning apparatus according to claim 1 or 2, characterised in that the connection stations (14.1-14.3) and the clutch device (8.5) are arranged in an engagement plane parallel to the movement path of the automatic handling device (8).

4. A melt spinning apparatus according to claim 3, characterised in that the connection stations (14.1-14.3) each have a plug connection (15), the coupling device (8.5) has a plug adapter (16), and the plug adapter (16) lies opposite the plug connection (15).

5. A melt spinning apparatus according to claim 3 or 4, characterised in that the clutch device (8.5) is held on a movable carriage (19), which movable carriage (19) can be guided in the engagement plane by means of a carriage drive mechanism (20).

6. A melt spinning apparatus according to any one of claims 1 to 5, characterised in that the guiding device (17) is formed by a suspension rail (17.1), the automatic handling device (8) is guided on the suspension rail (17.1), and the connecting stations (14.1-14.2) are arranged between guide rails (17.2) of the suspension rail (17.1).

7. A melt spinning apparatus according to any one of claims 1 to 6, characterised in that the automatic operating device (8) has a drive device (8.1) with a controllable drive motor (8.2), by means of which controllable drive motor (8.2) a slower crawling speed of the automatic operating device (8) can be set, at least in addition to the moving speed.

8. A melt spinning apparatus according to any one of claims 1 to 7, characterised in that the automatic handling device (8) has a joining robot (8.4) and a supply unit (8.3) with a waste container (9), wherein the supply unit (8.3) is connected to the clutch device (8.5) for the transmission of compressed air.

9. A melt spinning apparatus according to claim 8, characterised in that the piecing robot (8.4) has a suction jet (11) which is connected to the supply unit (8.3) by a compressed air line (12) and a waste line (13).

10. A melt spinning apparatus according to claim 9, characterised in that the joining robot (8.4) has a controllable mechanical arm (10), the controllable mechanical arm (10) guiding the suction jet (11) to splice the threads in one of the spinning positions (1.1-1.3).