CN112672966B

CN112672966B - Melt spinning device

Info

Publication number: CN112672966B
Application number: CN201980057535.3A
Authority: CN
Inventors: M-A·赫尔恩多夫; A·哈米德; S·福尔斯蒂奇
Original assignee: Oerlikon Textile GmbH and Co KG
Current assignee: Oerlikon Textile GmbH and Co KG
Priority date: 2018-09-20
Filing date: 2019-09-11
Publication date: 2023-08-29
Anticipated expiration: 2039-09-11
Also published as: CN112672966A; WO2020058046A1; DE102018007428A1

Abstract

The invention relates to a melt spinning device for producing synthetic threads, comprising a plurality of spinning positions (1.1-1.3). Each spinning position (1.1-1.3) has a spinning nozzle device (2), a cooling device (3), a godet device (6) and a winding device (7). An operating robot (9) which can be guided to each spinning position (1.1-1.3) for yarn splicing is provided for yarn splicing at the spinning positions (1.1-1.3). For this purpose, the handling robot has a suction ejector (22). In order for the suction ejector (22) to be connected to the compressed air source and the waste wire container, according to the invention the operating robot is distributed to the supply trolley (12) of the operating robot (9) by means of the compressed air line (15) and the waste wire line (16).

Description

Melt spinning device

Technical Field

The invention relates to a melt spinning apparatus for producing synthetic threads.

Background

Synthetic threads are produced by a melt spinning apparatus having a plurality of spinning positions. The spinning stations are arranged next to one another in this case in order to form a machine-direction front in the workshop. Each spinning position has a spinning nozzle arrangement with a number of spinning nozzles for extruding a plurality of filaments. The threads at the spinning point are drawn off together in groups of threads from the spinning nozzle by means of a godet device and wound in parallel at the end of the processing process in a plurality of winding points of a winding device to form a bobbin. The winding device of each spinning position is equipped with two winding spindles held on a winding turret, so as to produce the yarn continuously in the spinning position. For example, the yarn groups at the spinning position need to be guided and joined by means of auxiliary devices on the godet device and the winding device only at the beginning of the process or at the interruption of the process. Such auxiliary means are preferably formed by an operating robot which is guided movably in the machine direction and can be selectively guided to one of the spinning positions for engaging the threads. Melt spinning apparatuses of this type are disclosed, for example, in EP3312120 A1.

In known melt spinning apparatuses, the operating robot is designed to be repositionable in order to selectively access individual spinning positions. The operating robot for guiding and engaging the yarn groups of the respective spinning positions has a suction ejector which continuously picks up the yarn groups and guides them to the empty waste container. For operating the suction jet, the operating robot has a coupling adapter which is connected to the waste line and the compressed air line of the suction jet. The coupling adapter may be coupled to one connector of each spinning position to connect the waste line to the central waste line and the compressed air line to the central compressed air line. A central compressed air line extending through all spinning locations is connected to a central waste container.

However, the known melt spinning apparatus has the disadvantage that the waste line has to span a large distance and therefore requires compressed air at a relatively high positive pressure. The known melt spinning apparatus is not energy efficient due to the large amount of compressed air consumed in connection therewith.

Another disadvantage of the known melt spinning apparatus is that it is necessary to accurately position the operating robot to connect the compressed air and waste lines in the spinning position and to take and guide the filaments by means of jet injectors. In the spinning position, however, the position of the compressed air connection is independent of the position of the godet device and the winder on which the yarn is to be engaged. Therefore, an event that the operation robot is erroneously positioned is unavoidable.

Disclosure of Invention

The object of the present invention is now to create a melt spinning apparatus for producing synthetic threads of this type, in which the movements by the operating robot can be carried out as precisely and energy-effectively as possible.

According to the invention, this object is achieved by connecting the compressed air line and the waste line to a supply trolley and the supply trolley is guided on an overhead rail.

The invention has the particular advantage that the handling robot only has to be specially adapted in respect of its positioning to the respective positions of the winding device and the godet device. Such winding devices are often replaced periodically for maintenance purposes. Thus, a slight change in position may occur in the spinning position, which can easily be taken into account when positioning the handling robot. The coupling with the supply trolley allows flexibility in operating the robot. The connection of the compressed air line and the waste line between the handling robot and one of the spinning positions can be dispensed with.

In a particularly advantageous development of the invention, the supply trolley is equipped with a scrap container connected to a scrap line. Thus, the yarn set received via the suction ejector can be received over a short distance. In this regard, a compressed air setting with a relatively low positive pressure can be achieved to guide the yarn set within the spinning position.

In order to be able to very compactly store the yarn waste in a layer-by-layer manner in a waste yarn container, it is further provided that the waste yarn container for receiving the waste yarn has a cyclone-like inner structure, by means of which the waste yarn can be deposited in a spiral form. In view of this, randomly generated deposits and thus entanglement of filaments in the waste filaments can be avoided. In addition to a very compact filling of the waste silk container, there is the advantage that the retrieval and emptying of the waste silk container is simplified.

Since the filaments are deposited compactly in the filament container, a melt spinning device improvement is preferably realized in which the filament container has a movable waste flap for opening and closing on the underside of the supply trolley, which is connected to a controllable rotary actuator. Thus, waste material can be emptied from the empty waste container by simply opening the waste gate.

In order to be able to operate the compressed-air-operated suction ejectors of the handling robot in each spinning position, the following development of the invention is particularly advantageous, wherein each spinning position is assigned one of a plurality of connection stations, each having a compressed-air connector for delivering compressed air and interacting with a connection adapter provided on the supply trolley. The supply trolley in each spinning position can advantageously be connected in an automated manner with a compressed air supply which supplies compressed air into the compressed air line of the operating robot.

According to a preferred variant embodiment of the invention, the supply trolley and the handling robot are guided jointly on the overhead rail by means of a conveying device. In this way, the operating robot in each spinning position is quickly ready to work in order to be able to pick up the yarn groups and to engage the yarns in one of the spinning positions.

In principle, however, it is also possible to assign two separate conveying devices to the supply trolley and the handling robot, by means of which the supply trolley and the handling robot can be guided independently on the overhead rail. This development of the invention has the particular advantage that the handling robot and the supply trolley can be positioned independently of one another. Thus, the operating robot can be adapted to the conditions of the godet device and the winding device of the respective spinning positions. In contrast, the supply trolley can be adapted to the connection station of the respective spinning position.

In order to obtain a completely separate guidance of the supply trolley, for example for emptying the scrap wire container, a development of the invention is provided in which the compressed air line and the scrap wire line are realized in such a way that they can be connected between the handling robot and the supply trolley. The compressed air line and the waste line between the supply trolley and the handling robot can be separated or connected by simple plugging.

In order to be able to compensate for the desired minimum deviation in terms of position within the spinning position, the compressed air line and the waste line can also be realized in a manner that is flexible between the handling robot and the feed carriage. Thus, a smaller distance between the supply trolley and the handling robot can be covered without releasing the compressed air line and the waste line.

In order to be able to perform highly flexible all the activities for obtaining and landing and guiding the wire set, the operating robot has a controllable mechanical arm, which guides the suction nozzle and the cutting device at the free end. Since the mechanical arm is freely movable, a high degree of freedom in the handling of the wire is obtained.

The melt spinning apparatus according to the invention is particularly suitable for performing fully automatic production of synthetic threads. The workload of the operator is significantly reduced and is substantially only constituted by control functions and maintenance work.

Drawings

The melt spinning apparatus of the present invention will be described in more detail below by way of several examples with reference to the accompanying drawings, in which:

fig. 1 schematically shows a front view of a plurality of spinning positions of a melt spinning apparatus according to the present invention;

FIG. 2 schematically illustrates a front view of a supply trolley and an operating robot of the melt spinning apparatus according to the present invention of FIG. 1;

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

fig. 4 schematically shows a cross-sectional view of a scrap receptacle of the supply trolley of fig. 2;

FIG. 5 schematically illustrates a front view of the embodiment of FIG. 1 in a changed operational state;

fig. 6 schematically shows another embodiment of a supply trolley with an operating robot.

Detailed Description

An embodiment of a melt spinning apparatus of the present invention having a plurality of spinning positions is shown in front and side views in fig. 1 and 3. The following description applies to both figures unless one of them is specifically mentioned.

An embodiment of the melt spinning apparatus according to the invention has a plurality of spinning positions 1.1 to 1.3 which are arranged next to one another in rows and form the machine-direction side. The number of spinning positions shown in fig. 1 is merely exemplary. In principle, such melt spinning apparatuses comprise a large number of spinning positions of the same type.

The spinning positions 1.1 to 1.3 shown in fig. 1 are identical in their structure and will be explained in more detail by the spinning position 1.1 shown in fig. 3.

As can be seen from the view of fig. 3, each spinning point 1.1 to 1.3, in this case the spinning point 1.1, has a spinning nozzle device 2. The spinning nozzle arrangement 2 comprises a spinning beam 2.2, which supports a plurality of spinning nozzles 2.1 on the bottom side. The spinning nozzles 2.1 are connected to a spinning pump 2.3, which is preferably designed as a multiple pump and is connected to each spinning nozzle 2.1. The spinning pump 2.3 is connected via a melt inlet 2.4 to an extruder or another melt source (not shown here).

Below the spinning nozzle arrangement is arranged a cooling device 3, which in the present embodiment has a cooling duct 3.1 with a gas permeable wall inside a blowing chamber 3.3. The cooling duct 3.1 is used to receive and cool the filaments of each spinning nozzle. The gravity chute 3.2 is connected below the cooling duct 3.1.

A collecting device 4 with a plurality of thread guides 4.1 is arranged below the gravity chute 3.2. The yarn guides 4.1 are assigned to the spinning nozzles 2.1 and collect the filaments to form filaments. In this embodiment, the spinning nozzle device 2 produces four filaments. The number of filaments produced per spinning position is exemplary. Thus, such a spinning nozzle device 2 can simultaneously produce up to 32 threads at each spinning position.

The collecting device 4 is associated with a spin finishing device 5, by means of which the individual threads of the thread group 8 are wetted. The filaments are drawn off as a filament bundle 8 by means of a godet device 6 and fed to a winding device 7. In this embodiment, the godet unit 6 is formed by two driven godets 6.1. In order to cause the threads of the thread group 8 to be swirled apart, a swirling device 6.2 is provided between the godets 6.1.

The winding device 7 has one winding position 7.4 for each wire of the wire set 8. A total of four winding positions 7.4 extend along a winding spindle 7.1, which is held in a protruding manner on the winding turret 7.2. The winding turret 7.2 supports two winding spindles 7.1, which are alternately guided to a winding zone and a replacement zone. Each winding position 7.4 for dividing and separating the thread groups 8 is assigned one of a plurality of deflection rollers 7.6, which are arranged immediately downstream of the godet device 6. Each winding station 7.4 has a traversing unit 7.3 for winding and depositing the thread to form a bobbin. The traversing unit 7.3 interacts with a contact roller 7.5 arranged parallel to the winding spindle 7.1 and rotatably mounted on the frame. The contact roller 7.5 is supported on the surface of the bobbin 24 while the thread 8 is being wound to form the bobbin.

In the case shown in fig. 1 and 3, the spinning positions 1.1 to 1.3 are in their normal operation, in which a yarn package 8 consisting of a plurality of yarns is extruded, drawn off and wound continuously into bobbins 24 in each spinning position 1.1 to 1.3.

In order to be able to operate the spinning positions 1.1 to 1.3 at the beginning of the process or at the interruption of the process, an operating robot 9 is assigned to the spinning positions 1.1 to 1.3. In fig. 1 and 3, the handling robot 9 is shown in a waiting position. The handling robot 9 is held on an overhead rail 18 above the operator corridor. For this purpose, the overhead rail extends parallel to the machine longitudinal sides of the spinning positions 1.1 to 1.3.

The supply trolley 12 is assigned to the handling robot 9 on an overhead rail 18. The supply trolley 12 is connected to the handling robot 9 by means of a compressed air line 15 and a waste line 16.

For the explanation of the handling robot 9 and the supply trolley 12, reference is also made below to fig. 2 and 4.

In fig. 2, a front view of the handling robot 9 and the supply trolley 12 as shown in the spinning device according to fig. 1 is shown enlarged. In fig. 4 a cross-section of a supply trolley 12 with an integrated waste wire container 12.1 is shown. Where one of the figures is not explicitly mentioned, the following description applies to all of the figures.

The handling robot 9 has a chassis 9.1 which is held on an overhead rail 18. The chassis 9.1 is connected to a conveyor 10.1 by means of which the handling robot 9 can be displaced in the overhead track 18. For this purpose, the rail 18 has two guide rails 18.1 and 18.2. The conveyor 10.1 is connected to a robot controller 11. The robot controller 11 is connected to a machine controller 27 (shown in fig. 1).

The handling robot 9 has a robot arm 9.2 at the lower end. At the free protruding leading end, the robotic arm 9.2 carries a suction jet 22 and a cutting device 23. The protruding multi-piece robot arm 9.2 is freely movable by means of actuators and sensors not shown in detail here, the sequence of movement of the robot arm 9.2 being controlled by the robot controller 11. The operating robot 9 is preferably supplied with energy by means of a power rail or alternatively by means of an energy chain.

To operate the suction ejectors 22, the operating robot 9 is connected to the supply trolley 12. The supply trolley 12 has a chassis 12.6 which is held on an overhead rail 18. The conveyor 10.2 is assigned to the chassis 12.6. The conveyor 10.2 is connected to a trolley controller 17. The cart controller 17 is connected to the machine controller 27 or alternatively to the robot controller 11 by a wireless connection. The supply trolley 12 below the chassis 12.6 has a scrap receptacle 12.1.

As can be seen from the view of fig. 4, the waste thread container 12.1 has a cyclone-like internal structure in order to guide the incoming thread waste flow in particular in a spiral manner and to deposit the threads in a spiral manner. For this purpose, a tangentially configured container connector is provided in the upper region of the scrap container 12.1, to which the scrap line 16 is connected. In the central region, the scrap container 12.1 has a vent connection 12.5 which protrudes into the interior and has a vent opening, not shown here. The cyclone-like inner structure of the waste wire container 12.1 is formed by a slightly conical wall of the waste wire container 12.1, except for the exhaust port 12.5.

In addition to the scrap container 12.1, the supply trolley 12 has a compressed air connection 13. As shown in fig. 1 and 3, the compressed air connection 13 in each spinning position 1.1 to 1.3 interacts with a connection station 14. The compressed air connection 13 is formed by a movable connection adapter 13.1 and an activatable connection actuator 13.2. The connection adapter 13.1 is held on the support housing 13.3. The support housing 13.3 has a compressed air connector for the compressed air line 15.

To connect the connection adapter 13.1 to the connection station 14 of one of the spinning positions 1.1 to 1.3, the connection actuator 13.2 is activated by means of the trolley control 17. Each connection station 14 is connected to a central compressed air line 19, as is known from the illustrations in fig. 1 and 3. The connection adapter 13.1 thus forms a connection between the central compressed air line 19 and the compressed air line 15. For this purpose, the compressed air connection 13 is positioned by the supply trolley 12 at a corresponding connection station 14 of one of the spinning positions 1.1 to 1.3.

As can be taken from the illustrations in fig. 1 and 3, a compressed air line 15 and an exhaust gas line 16 are connected to the operating robot 9. The suction ejector 22 can then be connected to the ejector line 22.1 and to the compressed air line 15 and the waste line 16, respectively. Thus, the yarn groups received by the suction ejectors 22 during operation can be directly fed to the scrap wire container 12.1 of the supply trolley 12.

The scrap receptacle 12.1 has a scrap baffle 12.2 on the underside of the supply trolley 12. The waste gate 12.2 is configured to be rotatable and movable by a gate actuator 12.3 for opening and closing the waste wire container 12.1. The shutter actuator 12.3 is connected to the trolley controller 17. A filling level sensor 12.4, which is likewise connected to the trolley control 17, is arranged in the waste wire container 12.1.

During operation of the robot arm 9, the yarn groups accommodated in one of the spinning positions 1.1 to 1.3 are introduced into the waste yarn container 12.1 as waste yarn streams tangentially via the waste line 16 and the container connector. Because of the vortex-shaped flow guide, the waste silk can be stored in the wire waste silk container in a spiral shape in a plurality of deposition layers. A very compact filling of the waste thread container can be achieved. The filling level of the thread filling vessel 12.1 is monitored by a filling level sensor 12.4 so that the waste thread vessel can be emptied as required.

Fig. 5 shows the emptying of the scrap container 12.1 of the supply trolley 12. Here, the supply trolley 12 and the handling robot 9 are preferably moved to a waiting position. The collection container 20 is then placed under the supply trolley 12. Once the collection vessel 20 has been in a low position below the waste wire vessel 12.1, the flap actuator 12.3 may be operated by the trolley controller 17 to open the waste flap 12.2. After opening the waste gate 12.2, the waste wire is automatically emptied from the waste wire container 12.1 and received by the collection container 20. The collection container 20 is preferably assigned a conveyor 21 by means of which the waste threads are conveyed away.

In the embodiment shown in fig. 1 and 2, the handling robot 9 and the supply trolley 12 are realized in such a way that they can be moved independently of each other by the conveyor means 10.1 and 10.2. The conveyor devices 10.1 and 10.2 are preferably controlled synchronously in such a way that the handling robot 9 and the supply trolley 12 move synchronously on the overhead rail 18. For example, both conveyor means 10.1 and 10.2 may be controlled by the robot controller 11. When the respective spinning positions are reached, fine adjustments can be made in a mutually independent manner to position the handling robot 9 and the supply trolley 12. For this purpose, the conveyor devices 10.1 and 10.2 are controlled by the robot controller 11 and the trolley controller 17, respectively. In order to allow for the movability of the handling robot 9 and the supply trolley 12, the compressed air line 15 and the waste line 16 are configured to be flexible between the supply trolley 12 and the handling robot 9.

In principle, however, the connection between the supply trolley 12 and the handling robot 9 can also be realized in a connectable manner. The handling robot 9 and the supply trolley 12 can thus be guided completely independently of each other on the overhead rail 18, and the connection between the supply trolley 12 and the handling robot 9 is only activated if the handling robot 9 has to be active in one spinning position. For example, the compressed air line 15 and the waste line 16 can be connected to the handling robot 9 by plugging.

Another embodiment of the supply trolley 12 and the handling robot 9 is schematically shown in fig. 6. The embodiment according to fig. 6 is substantially identical to the embodiment according to fig. 3, so that only the differences are explained here. In the embodiment shown in fig. 6, the supply cart 12 and the handling robot 9 are coupled to each other by a coupling lever 25. The tie rod 25 connects the chassis 9.1 and 12.6 to each other. The conveyor 10 is assigned to the chassis 9.1 of the handling robot 9. Thus, the handling robot 9 and the supply trolley 12 can be guided jointly by the conveyor 10 on the overhead rail 18.

Claims

1. Melt spinning apparatus for producing synthetic threads, comprising a plurality of spinning positions (1.1-1.3), each spinning position having a spinning nozzle device (2), a cooling device (3), a godet device (6) and a winding device (7), the melt spinning apparatus further comprising an operating robot (9), the operating robot (9) being guided on an overhead rail (18) parallel to the spinning positions (1.1-1.3) arranged in rows and having a suction jet (22) for threading and guiding the threads, characterized in that the melt spinning apparatus comprises a supply trolley (12), the supply trolley (12) being guided on the overhead rail and the supply trolley (12) being connected to the operating robot (9) by means of a compressed air line (15) and a waste line (16), the suction jet (22) being connected to the compressed air line (15) and the waste line (16), each spinning position (1.1-1.3) being assigned to one of the plurality of connection stations (14) and being connected to one of the compressed air adapters (13) for connection to the other, respectively, the supply trolley (13).

2. Melt-spinning apparatus according to claim 1, characterized in that the supply trolley (12) has a waste thread container (12.1) connected to the waste line (16).

3. Melt-spinning apparatus according to claim 2, characterized in that the waste thread container (12.1) for receiving waste threads has a cyclone-like inner structure by means of which waste threads can be deposited in a spiral form.

4. Melt spinning apparatus according to claim 2, characterized in that the waste thread container (12.1) has a movable waste shutter (12.2) on the bottom side of the supply trolley (12) for opening and closing, and that the waste shutter (12.2) is connected to a controllable shutter actuator (12.3).

5. Melt spinning apparatus according to claim 1, characterized in that the supply trolley (12) and the handling robot (9) are assigned to a common conveying device (10), by means of which the supply trolley (12) and the handling robot (9) can be guided jointly on the overhead rail (18).

6. Melt spinning apparatus according to claim 1, characterized in that the supply trolley (12) and the handling robot (9) are assigned to two separate conveying devices (10.1, 10.2), by means of which the supply trolley (12) and the handling robot (9) can be guided independently on the overhead rail (18).

7. Melt-spinning apparatus according to claim 6, characterized in that the compressed air line (15) and the waste line (16) are realized in such a way that they can be connected between the handling robot (9) and the supply trolley (12).

8. Melt spinning apparatus according to claim 6, characterized in that the compressed air line (15) and the waste line (16) are realized in a manner that is flexible between the handling robot (9) and the supply trolley (12).

9. Melt-spinning apparatus according to claim 1, characterized in that the handling robot (9) has a controllable mechanical arm (9.2) which guides the suction jet (22) and the cutting device (23) at the free end.