CN102869819A - Method and device for melt spinning and cooling a plurality of synthetic threads - Google Patents

Abstract

The present invention relates to a method and a device for melt spinning and cooling a plurality of synthetic threads which are extruded and cooled in groups in a plurality of spinning stations operating side by side. To this end, the spinning stations are each supplied with cooling air flows for cooling the respective threads, which are supplied from a common cooling air flow source. In order to be able to vary the cooling air flow, especially in the event of an operating disturbance, according to the invention, the cooling air flow rate of at least one associated spinning station is varied independently of the source of the cooling air flow. For this purpose, the supply line assigned to the spinning station has a regulating device for regulating the flow rate of the cooling air stream.

Description

Method and apparatus for melt spinning and cooling many synthetic filaments

technical field

The invention relates to a method for melt spinning and cooling a plurality of synthetic threads according to the preamble of claim 1 and a device for carrying out the method according to the preamble of claim 10 .

Background technique

A similar method and a similar device are known, for example, from WO 2005/052224 A1.

In the manufacture of synthetic threads, it is usually necessary to manufacture a large number of synthetic threads. For handling, especially during process start and process interruption, the threads are extruded and cooled in groups by a plurality of spinning stations arranged side by side in the spinning plant. The threads produced by the spinning station are collectively wound into bobbins by a winding device assigned to the spinning station. Depending on the characteristics of the winding unit, 8 to 32 yarns can be produced simultaneously in one spinning station. The spinning stations run side by side and are built together in one hall. In order to be able to cool the freshly extruded yarns in the spinning stations, a separate cooling air flow is supplied to each spinning station, which is fed to the associated cooling device for cooling the yarns.

As known from WO 2005/052224 A1, the cooling air flow fed to the spinning station is supplied by a common cooling air flow source. For this purpose, the source of the cooling air flow is connected to a main line which extends along the spinning station, so that the cooling devices assigned to the spinning station are connected to the main line via corresponding supply lines. Thus, the cooling air flow supplied by the main line can be fed to the individual spinning stations. In the spinning station, depending on the design of the cooling device, the cooling flow is supplied to the monofilament bundle as a transversely oriented air flow or as a radially oriented air flow. However, it is also possible to distribute the cooling air flow in the cooling device via several cooling cylinders or blow plugs and to supply each yarn in the spinning station with a cooling air partial flow.

In known methods and known devices, the same cooling air flow is generated in each spinning station, the intensity of which is primarily predetermined by the respective process and yarn type.

In order to achieve high process speeds in the production of synthetic threads, cooling devices have been provided in which the lowest possible relative speed is produced between the cooling air flow and the threads. Such cooling devices therefore usually require a higher flow rate, which can be produced by increasing the power of the cooling air flow source. However, it has now been shown that the increased flow in the spinning station is not suitable for all operating states. Especially the spinning and threading-up of yarns are difficult when the cooling air flow is high.

Contents of the invention

It is now the task of the present invention to provide a homogeneous method and device for extruding and cooling a plurality of filaments, wherein all spinning stations can be operated together with a relatively large flow of cooling air flow supplied by a source of cooling air flow .

Another object of the present invention is to provide a method and apparatus for melt spinning and cooling a plurality of synthetic yarns in which spinning stations operating side by side can be supplied by a common source of cooling air flow when cooling air flow requirements differ.

According to the invention, the object is achieved by a method with the features of claim 1 and an arrangement with the features of claim 10 .

Advantageous developments of the invention are defined by the features and feature combinations of the subclaims.

The characteristic of the present invention is that in the spinning station, the flow rate of the cooling air flow input can be directly adjusted according to the current operating conditions, and there is no need to change the main flow generated by the cooling air flow source. Concerns that an altered flow at at least one spinning station would adversely affect the adjacent cooling air flow at an adjacent spinning station have not been identified. It has been found that the operating time of the modified regulated cooling air flow rate in a spinning station compared to conventional operation is relatively short and therefore not noticeable in the overall system of all spinning stations. In addition, the changed operating state usually only occurs simultaneously in several spinning stations of the overall plant, so that the actual production process in the spinning stations is basically not affected by this.

In this regard, a method variant in which the cooling air flow rates of adjacent spinning stations can be adjusted independently of one another has proven to be advantageous. Individual adjustments can thus be carried out or differently designed cooling devices can be provided in the spinning station.

It has been shown in many applications that the adjustment between the two adjustments of the cooling air flow already enables a high production reliability throughout the thread production process. Usually, in the operating state, the cooling air flow is adjusted to an operating quantity, which provides an increased flow for cooling the wires. In order to allow the thread to be spun up or spun reliably after a thread break or after the start of the process, the cooling air flow rate is adjusted to a standstill amount, which for example maintains a minimum cooling air flow.

In principle, however, the cooling air flow can also be stopped more than the running cooling air flow in order to improve certain threading processes in such a way that the cooling air flow can be used for pneumatically transporting loose thread ends.

The regulation of the flow rate of the cooling air stream is preferably carried out by a throttle valve which is integrated into the supply line of the spinning station. In this case, only the maximum cooling air flow provided by the cooling air flow source can be throttled.

In contrast, another method variant allows a larger cooling air flow rate than the cooling air flow source to be obtained. In this case, the regulation of the flow rate of the cooling air stream is carried out in the spinning station by auxiliary blowers.

Depending on the configuration of the regulating device, the control required for process changes can be carried out manually or automatically. In automatic control, the throttle valve is operated by an electrically modulating actuator connected in the control circuit of the control device. It has proven to be particularly advantageous here for a concept in which the wire monitoring unit is also connected into the control circuit of the control device, so that the signal generated in the event of a wire break can be used directly to adapt the cooling air flow to the changed operating situation.

When the cooling air flow is regulated by means of an auxiliary blower, the blower motor can simply be incorporated into the control algorithm of the spinning station.

By changing the flow rate of the cooling air main flow generated by the cooling air flow source for supplying the cooling air flow to adjust the main flow, the flexibility of changing the cooling air flow and the adjustment range can be further improved and improved. Thus, the main supply of cooling air can be adjusted, for example to a constant pressure level, by a superordinate control in order to achieve a predetermined flow of cooling air flow at the spinning station in order to cool the yarn.

The method according to the invention can be used particularly advantageously in a situation in which a cooling air flow is introduced into a pressure chamber at least in one of the spinning stations and the cooling air flow is distributed to a plurality of surrounding threads through the pressure chamber The breathable cooling cylinder to cool the wire. In this case, the cooling air flow is distributed in the spinning station in separate streams to a plurality of threads, so that large pressure losses can be avoided.

Furthermore, the particular advantage of cooling the threads in the cooling tubes arranged downstream of the cooling cylinder is that higher spinning speeds can thus be achieved, in particular for the production of so-called POY threads.

In order to carry out the method, the device according to the invention has a regulating device for regulating the flow of the cooling air flow in at least one of the supply lines of the spinning station. As a result, the cooling air flow can be individually adapted in the spinning station, which adaptations can be selected depending on the respective operating state of the spinning station.

Generally, the spinning stations in the entire spinning plant for producing synthetic threads are of the same design, so that the threads produced in the spinning stations are each cooled by means of cooling devices of the same design. In this connection, an embodiment of the device according to the invention is preferably used, in which a plurality of regulating devices are provided, which are assigned to the supply lines of the individual spinning stations and which can be adjusted independently of one another.

In order to regulate the cooling air flow supplied by the supply line of the spinning station, the regulating device is designed in such a way that it is possible to select between a plurality of switching positions in order to regulate the cooling air flow. For example, the required cooling air flow rate for cooling the thread and the desired cooling air flow rate for thread threading at the start of the process can be adjusted.

In a simple design, the regulating device can consist of a throttle valve, which is arranged in the supply line and can be operated manually by an operator or by a regulating actuator.

However, the regulating device can advantageously also be formed as an auxiliary blower, which is driven by a blower motor and leads to an increase in the cooling air flow in the supply line. Such a regulating device is particularly advantageous when only a few spinning stations require an increased cooling air volume compared to the cooling air flow source.

According to an advantageous development of the device according to the invention, a controller is assigned to the adjusting actuator and/or the blower motor, said controller is coupled to a control device, and said control device is assigned to The yarn monitoring unit of the spinning station is connected and the regulation of the cooling air flow can be carried out automatically. After determining a thread break in the spinning station, the thread is usually cut immediately and sucked into the waste station. In this phase, the reduced cooling air flow is already set in that after signal processing the control device controls the adjusting actuator or the blower motor via an associated controller in order to bring the adjusting device into the changed switching position.

If there are large fluctuations between the cooling air flow adjustments in the spinning station, the main flow can be adjusted to avoid large volume flow fluctuations by means of an expansion of the device according to the invention, in which the connection to the cooling air The main line on the flow source is connected with a bypass line and a bypass valve, the main line is equipped with a pressure sensor, and the pressure sensor and the bypass valve are coupled to each other through the device control device. A pre-defined air pressure limit range in the main line can thus be maintained by the plant control.

However, if the source of the cooling air flow is formed by the main blower, it is also possible as an alternative to couple the blower drive and the pressure sensor arranged in the main line to one another via the blower control. The cooling air flow generated by the main blower can thus be adjusted within defined limits.

The cooling device arranged in the spinning station for cooling the threads is preferably formed by a pressure chamber to which the supply line is connected and which has a gas-permeable cooling cylinder for each spinneret. As a result, each thread extruded from the spinneret, usually consisting of a plurality of filaments, can be cooled uniformly. The cooling air flow in the pressure chamber is divided into a plurality of partial flows, each directed towards a wire.

Cooling the yarn in cooling tubes has proven to be particularly beneficial when producing so-called POY yarns, in which the additional acceleration of the cooling air is used to increase the spinning speed. For this purpose, a cooling tube is assigned to each cooling cylinder on the underside of the pressure chamber.

Description of drawings

The method according to the invention and the device according to the invention will now be described in more detail with reference to the drawings using several exemplary embodiments of the device according to the invention. The accompanying drawings are as follows:

Fig. 1 is the schematic diagram of the first embodiment of the device of the present invention implementing the inventive method;

FIG. 2 is a schematic illustration of the regulating device according to the embodiment of FIG. 1 in different regulating positions for regulating the cooling air flow;

3 to 5 are schematic diagrams of various embodiments of the apparatus of the present invention implementing the method of the present invention;

FIG. 6 is a schematic view of a spinning station according to one embodiment of the apparatus according to the invention.

Detailed ways

FIG. 1 shows a schematic view of a first exemplary embodiment of a device according to the invention for carrying out the method according to the invention. In this example, only two spinning stations are shown for the sake of clarity to produce two groups of filaments, each containing five filaments. Usually, several such spinning stations are arranged side by side to produce many synthetic threads. Accordingly, the number of filaments per spinning station is also exemplary. Typically, at least 8 up to a maximum of 32 filaments are extruded and cooled in parallel in one spinning station.

In the embodiment shown in Figure 1, the spinning stations 1.1 and 1.2 are arranged side by side. The spinning stations 1.1 and 1.2 are constructed identically. Accordingly, each spinning station 1.1 and 1.2 has a spinning beam 2 and a cooling device 6 arranged below the spinning beam 2 . On its upper side, the spin beam 2 has a spinning pump 3 which is connected via a melt feed 4 to a melt source (not shown here). The spinning pump 3 is designed as a multipump and is driven via a drive shaft 5 .

The spinning pump 3 is connected via a distribution system arranged in the heated spin beam to a plurality of spinnerets which are held on the underside of the spin beam 2 (not shown here).

The cooling device 6 arranged below the spinning beam 2 comprises, in this exemplary embodiment, a pressure chamber 8 and a plurality of cooling lines 7 connected to the underside of the pressure chamber 8 . Each cooling tube 7 is assigned to a spinneret (not shown here) in order to cool a respective filament bundle of a thread. On each cooling tube 7 the wire 27 is guided by a wire guide 34 arranged below the cooling tube 7 .

In order to supply the cooling air flow to the cooling device 6 of the spinning stations 1.1 and 1.2, a supply line 9.1 and 9.2 is assigned to each of the spinning stations 1.1 and 1.2. The supply lines 9.1 and 9.2 lead into the pressure chamber 8 of the cooling device 6 of the respective spinning station 1.1 and 1.2, respectively. The supply lines 9.1 and 9.2 are connected at opposite ends to the main line 10. The main line 10 is connected to a cooling air flow source 11 via which a main flow of cooling air is generated in the main line 10 .

A regulating device 12.1 and 12.2 is assigned to each supply line 9.1 and 9.2 in order to be able to regulate the flow rate of the cooling air flow fed via the supply lines 9.1 and 9.2 to the spinning stations 1.1 and 1.2 respectively. In this exemplary embodiment, the regulating devices 12.1 and 12.2 are each identically formed by a throttle valve 13 . The throttle valve 13 can be adjusted here by means of a handwheel 14 .

A main line 10 , which is connected to a cooling air flow source 11 , runs along a spinning station (not shown here). Therefore, at least one supply line is connected to the main line 10 per spinning station.

In the region of the cooling air flow source 11 , the main line 10 has a bypass line 15 provided with a bypass valve 16 . The bypass line 15 opens into the environment, so that a partial flow of cooling air can exit the main line 10 directly via a bypass valve 16 . The bypass valve 16 is formed in the exemplary embodiment as a manually adjustable throttle valve, so that the partial flow can be adjusted as required to control the main flow in the main line 10 .

In the exemplary embodiment shown in FIG. 1 , in the spinning stations 1 . 1 and 1 . 2 , a plurality of threads of the supplied polymer melt are each extruded in parallel and subsequently cooled. After the wire has cooled, the wire is pulled out by the godet system, stretched and then wound into a bobbin. For this purpose, a godet system (not shown here) and a winding device are assigned to each spinning station 1.1 and 1.2. In each spinning station 1.1 and 1.2 a set of threads can be continuously produced from the polymer melt. In this operating state, in order to cool the yarn in the spinning station 1.1 or 1.2, a predefined flow of cooling air flow is required to be fed through the supply lines 9.1 and 9.2. Correspondingly, the adjusting devices 12.1 and 12.2 are each adjusted into the first switching position in order to set the required flow.

At the start of the process or after a thread break, the thread needs to be spun up in the godet system and winding device. The spinning-in process is carried out at a reduced production speed, so that the cooling air flow in the cooling device adjusted to the production speed impedes and interferes with the spinning-in process. Likewise, the initial spinning at the beginning of the process has special needs so that the individual freshly extruded yarns can pass through the cooling tubes. In this regard, it is necessary to adjust the cooling air flow of the cooling device to obtain a changed flow. For example, the cooling air flow in the supply line 9.1 can be adjusted to an operating or shut-down quantity by means of the regulating device 12.1. The operating volume of the cooling air flow is used to cool the wires, and at process interruptions or process start-ups a stoppage volume is set which is preferably smaller than the operating volume of the cooling air flow. As a result, the re-spinning of the thread can be optimized so that short interruption times can be achieved.

FIG. 2 shows an example of different switching positions of the regulating device 12.1 in the supply line 9.1. These switching positions are realized here by different positions of the throttle valve 13 in the supply line 9.1. In FIG. 2.1 , the throttle valve 13 is in the maximum open state, so that the supplied cooling air flow can pass through the throttle valve 13 without hindrance.

FIG. 2.2 shows a changed switching position of the throttle valve 13 , where a reduced opening cross section is released by the throttle valve 13 in the supply line. A reduced cooling air flow is thus set. This position can be used, for example, to regulate the stoppage of the cooling air flow at the spinning station.

FIG. 2.3 shows the closed position of the throttle valve 13, whereby the cooling air flow in the supply line 9.1 is interrupted and thus no longer feeds the cooling air flow to the spinning station 1.1. This position can preferably be adjusted during maintenance work on the spinning station.

In order to achieve a high degree of reproducibility of the individual throttle positions of the throttle valve 13 , the position of the throttle valve 13 can be monitored by means of sensors, for example angle sensors.

In the exemplary embodiment shown in FIG. 1 , the cooling air flow can be adjusted individually at the spinning stations 1.1 and 1.2, and there is no need to change the main flow in the main line 10 generated by the cooling air flow source 11 . In the embodiment shown in Figure 1, the adjustment of the cooling air flow can be performed manually by individual operators. In principle, however, such adjustments can also take place automatically and be integrated in the control design of the machine. The embodiment shown in FIG. 1 can thus be modified by additional actuators and controllers like the embodiment according to FIG. 3 .

The structure of the exemplary embodiment shown in FIG. 3 is the same as that of the exemplary embodiment according to FIG. 1 , so that reference is made to the above description and only the differences are explained here.

For automatic regulation of the cooling air flow, a regulating actuator 17 is assigned to the regulating devices 12 . 1 and 12 . 2 , which is coupled to a controller 18 . The controller 18 of the regulating devices 12 . 1 and 12 . 2 is connected to a central control device 19 .

Each spinning station 1.1 and 1.2 has an operating panel 20.1 and 20.2, which is connected to the control device 19. Operators can input control commands through the operation panels 20.1 and 20.2, so as to start initial spinning or maintenance. The cooling device 6 is therefore generally height-adjustable and detachable from the spinning beam via an adjustment device (not shown here). The supply lines 9.1 and 9.2 are therefore preferably designed to be flexible.

Now, in order to maintain the predefined cooling air flow rates on the spinning stations 1.1 and 1.2 on the regulating devices 12.1 and 12.2 respectively, the desired switching positions can be entered via the operating panels 20.1 and 20.2 respectively, thereby controlling the corresponding cooling air flows via the control device 19. A controller 18 and an adjustment actuator 17 in order to control the adjustment device 12.1 or 12.2.

In the embodiment shown in FIG. 3, the upper-level regulation is set for the main flow. For this purpose, a valve actuator 21 and a valve control unit 22 , which are coupled to the control unit 19 , are assigned to the bypass valve 16 . A pressure sensor 28 is assigned to the main line 10 and is connected to the control device 19 . The pressure signal supplied by the pressure sensor 28 can thus be continuously monitored in the control device 19 and a corresponding valve control can be carried out at the bypass valve 16 on the basis of the actual value-set value comparison. A uniform supply of all connected spinning stations 1.1 and 1.2 can thus be achieved.

In order to be able to integrate the events of the yarn from the spinning station up to winding into the control design, FIG. 4 shows another embodiment, the structure of which is basically the same as that of the embodiment according to FIG. 3 . The above description is therefore quoted here and only the main differences are stated.

In the exemplary embodiment shown in FIG. 4, the godet systems 25.1 and 25.2 and the winding devices 26.1 and 26.2 assigned to the spinning stations 1.1 and 1.2 are schematically shown. The godet systems 25.1 and 25.2 are usually arranged directly below the cooling device 6 of the spinning stations 1.1 and 1.2 in order to draw the yarn tufts out of the cooling device 6. Downstream of the godet systems 25.1 and 25.2, winding devices 26.1 and 26.2 are arranged, in which the yarns are wound up in parallel next to each other to form a bobbin. A wire monitoring unit 24.1 is arranged between the godet system 25.1 and the winding device 26.1, for example for detecting a wire break. The yarn monitoring unit 24.1 is connected to a regulation control unit 23.1, which is assigned to the spinning station 1.1 and is coupled to the operating panel 20.1. The regulating control unit 23.1 is also connected to the controller 18 of the regulating actuator 17 in order to control the regulating device 12.1 in the supply line 9.1.

Similar to the spinning station 1.1, the spinning station 1.2 is also equipped with a regulating control unit 23.2, which is connected to the operating panel 20.2, the thread monitoring unit 24.2 and the regulating device 12.2. Through the additional link to the yarn monitoring unit, the regulation of the cooling air flow in the spinning station can be automated in such a way that when a thread break is detected, the cooling air flow rate is variably adjusted directly at the respective regulating device 12.1 or 12.2. After elimination of process disturbances and re-starting, the adjustment device 12.1 or 12.2 can be reset via the operating panel 20.1 or 20.2 by means of the adjustment control unit 23.1 or 23.2.

In the exemplary embodiment according to FIG. 4 , the cooling air flow source 11 is designed as a main blower 29 and is driven by a blower drive 30 in order to generate a main flow in the main line 10 . In this case, superordinate regulation of the main flow can take place as follows: The blower drive 30 is assigned a blower control 31 , which is connected to the pressure sensor 28 . A pressure sensor 28 is arranged in the main line 10 and monitors the overpressure in the main line caused by the feeding of the cooling air flow. As a result, a gas flow that is as constant as possible can be produced in the main line 10 independently of the conditions in the spinning stations 1.1 and 1.2.

As mentioned at the outset, in this exemplary embodiment a plurality of spinning stations arranged side by side, preferably in a row, are operated. It is very common here that not all spinning stations are constructed identically, so that for example different cooling devices are used to cool the threads. However, in order to be able to individually adjust the cooling air flow at certain spinning stations, another embodiment is shown in FIG. 5 . In the exemplary embodiment shown in FIG. 5 , the first three spinning stations are shown, wherein the spinning stations 1.1 and 1.2 are configured identically to the previous exemplary embodiment. In contrast, the spinning station 1.3 has a cooling device 6 in which no cooling tubes are used to cool the yarn. The spinning stations 1.1 and 1.2 are constructed identically to the spinning stations 1.1 and 1.2 of the exemplary embodiment according to FIG. 4 , only the regulating devices 12.1 and 12.2 being formed in this case by the auxiliary blower 32 . Each auxiliary blower 32 is operated by a blower motor 33 which is controlled by means of a controller 18 . The controller 18 is connected to an adjustment control unit 23.1 or 23.2, which is coupled to an operating panel 20.1 or 20.2 and a thread monitoring unit 24.1 or 24.2.

In contrast, the spinning station 1.3 is connected to the main line 10 via a supply line 9.3, which has no regulating device. Here, the cooling air flow fed to the spinning station 1.3 is determined solely by the regulation of the main flow in the main line and the cross-sectional ratio between the supply line 9.3 and the main line 10. The cooling air flow produced by the cooling air flow source 11 is received as a basic supply in the spinning stations 1.1 and 1.2. To obtain an increased flow of cooling air flow for cooling the wires, a sleeve blower 32 is used.

In principle, however, it should be pointed out that such an auxiliary blower can also be used in the exemplary embodiments according to FIGS. 3 and 4 in order to generate a pressure increase, which can be adjusted via a throttle valve, for example by means of the auxiliary blower. What is important here is that the cooling air flow supplied to the cooling device can be adjusted accordingly in the spinning station for different operating states such as initial spinning, thread breakage, thread spinning, etc.

FIG. 6 shows an exemplary embodiment of a spinning station, which can be advantageously used, for example, in the exemplary embodiments according to FIGS. 1 to 5 . This exemplary embodiment of the spinning station has a spinning beam 2 with a plurality of spinnerets 39 which are connected via a distribution line system 40 to a spinning pump 3 . The spin beam 2 is designed to be heatable in order to heat the melt-conducting components.

Arranged on the underside of the spin beam 2 is a pressure chamber 8 which is held by a lifting device 41 and whose height can be adjusted relative to the spin beam 2 . In the exemplary embodiment, the pressure chamber 8 has an upper chamber 36 and a lower chamber 37 which are separated from one another by a gas-permeable partition 42 . The supply line 9 . 1 is connected to the lower chamber 37 of the pressure chamber 8 , so that the cooling air flow flowing into the lower chamber 37 is distributed to the upper chamber 36 . In the upper chamber 36 , a cooling cylinder 35 is arranged coaxially to the spinneret 39 , which has a gas-permeable wall. The cooling cylinders 35 each enclose the monofilament clusters produced by the spinnerets, which are usually merged into threads. Thus, the flow of cooling air entering the upper chamber 36 via the cooling cylinder 35 is distributed and fed in partial flow to the extruded filament bundle.

In the extension of the cooling cylinder 35, a pipe connection 38 and a cooling pipe 7 are arranged in each case in order to effect cooling of the monofilaments. A pipe connection 38 passes through the lower chamber 37, on the underside of which the cooling pipe 7 is held. The cooling tube 7 has a constricted cross-section in the direction of its thread run, so that the partial flow introduced via the cooling cylinder 35 is additionally accelerated in order to achieve the highest possible spinning speed.

In order to be able to cool many threads uniformly by means of the cooling air flow supplied to the spinning station, a large flow rate is required, which can be in the range of 40-120 m ³ /h.

In the embodiment shown in FIG. 6, the control of the lifting device 41 - for example in order to separate the cooling device 6 and the spinning beam 2 during maintenance cycles - can also advantageously be integrated with the central control device 19 or the regulation control unit 23.1 or 23.2. Combined, the cooling air flow can be adjusted according to the control of the lifting device 41.

The embodiment of the spinning station shown in Figure 6 is exemplary only. In principle, the spinning station embodied in the device according to the invention and the spinning station operated by the method according to the invention can also comprise a cooling device without cooling pipes. Advantageously, the cooling devices can be operated in such a way that they guide the cooling air flow transversely onto the thread bundles by means of the blowing walls. Particularly advantageously, a cooling device can also be used in which the individual wires are cooled by means of blow plugs. What is important here is that the cooling air flow rate can be adjusted in a variable, preferably reduced, manner in the spinning station in the event of a thread break or thread spinning-in, and that the entire supply system of the cooling air flow source does not need to be intervened here.

List of reference signs

1.1,1.2,1.3 spinning station

2 Spinning beam

3 Spinning pump

4 Melt input piece

5 drive shaft

6 Cooling device

7 Cooling pipe

8 pressure chamber

9.1, 9.2, 9.3 supply lines

10 Supervisor Road

11 Cooling air flow source

12.1, 12.2, 12.3 Adjusting device

13 Throttle valve

14 handwheel

15 Bypass pipeline

16 Bypass valve

17 Adjustment actuator

18 Controller

19 control device

20.1, 20.2 Operation panel

21 Valve Actuator

22 Valve control device

23.1, 23.2 Regulation control unit

24.1,24.2 Wire monitoring unit

25.1,25.2 Godet system

26.1, 26.2 Winding device

27 silk thread

28 pressure sensor

29 Main blower

30 Blower drive

31 Blower control device

32 Auxiliary blower

33 Blower motor

34 yarn guide

35 cooling cylinder

36 upper room

37 lower room

38 pipe joint

39 spinneret

40 Distribution piping system

41 Lifting device

42 Partition

Claims (19)

1. Method for melt-spinning and cooling of many synthetic threads, wherein the threads are extruded and cooled in groups in a plurality of spinning stations operating side by side, the spinning stations being supplied with cooling air for cooling the threads concerned flow, and the cooling air flow of each spinning station is supplied by a common source of cooling air flow, it is characterized in that, when the operating state in one of the spinning stations changes, the cooling air flow of the relevant spinning station and the cooling air The source of the stream changes independently. 2. The method according to claim 1, characterized in that the flow rates of the cooling air streams of adjacent spinning stations are adjusted independently of each other. 3. The method according to claim 1 or 2, characterized in that the flow rate of the cooling air flow at the spinning station is adjusted between the stop quantity of the cooling air flow and the operation quantity of the cooling air flow. 4. Method according to one of claims 1 to 4, characterized in that the flow of the cooling air stream is regulated by means of a throttle valve and/or an auxiliary blower in the supply line connected to the spinning station. 5. A method according to claim 4, characterized in that the throttle valve is operated manually or by an electrically adjustable actuator. 6. Method according to claims 4 and 5, characterized in that the adjustment actuator and/or the blower motor of the auxiliary blower are controlled by a control device and the yarn of the spinning station is monitored by a yarn monitoring device which The signal is transmitted to the control device when the line is broken. 7. The method according to one of the preceding claims, characterized in that the cooling air flow main flow is regulated by varying the flow rate of the cooling air flow main flow for supplying the cooling air flow to the spinning station generated by the cooling air flow source. 8. The method according to one of claims 1 to 7, characterized in that the cooling air flow is introduced into a pressure chamber at least in one of the spinning stations and the cooling air flow is distributed through the pressure chamber to a plurality of air-permeable air-permeable chambers surrounding the thread. The cooling cylinder to cool the wire. 9. The method according to claim 8, characterized in that the flow of cooling air is distributed via a cooling cylinder to a plurality of cooling tubes surrounding the wire. 10. Apparatus for carrying out the method according to one of claims 1 to 9, comprising a plurality of spinning stations (1.1, 1.2) and a plurality of supply lines (9.1, 1.2) assigned to the spinning stations (1.1, 1.2) 9.2), the spinning stations respectively have a spinning box (2) with a plurality of spinnerets (39) and a cooling device (6), and each supply pipeline is connected to a main pipeline (10) , and the cooling device (6) of each spinning station (1.1, 1.2) is connected in parallel to the central cooling air flow source (11), characterized in that at least one of the supply lines (9.1, 9.2) is configured for regulating Regulating device for cooling air flow (12.1). 11. The device according to claim 10, characterized in that a plurality of adjusting devices (12.1, 12.2) are provided, which are assigned to the supply lines (9.1, 9.2) and can be adjusted independently of one another. 12. The device as claimed in claim 10 or 11, characterized in that the adjusting device (12.1) or the adjusting devices (12.1, 12.2) each have a plurality of switching positions for adjusting the flow rate of the cooling air flow. 13. Device according to one of claims 10 to 12, characterized in that the adjusting device (12.1) is formed by a throttle valve (13), which can be operated manually or by adjusting the actuator (17 )operate. 14. The device as claimed in one of claims 10 to 13, characterized in that the adjusting device (12.1) is formed by an auxiliary blower (32), which is driven by a blower motor (33). 15. Device according to claim 13 or 14, characterized in that a controller (18) is assigned to the adjustment actuator (17) and/or the blower motor (33), said controller and the control device (19, 23.1) and the control device (19) is connected to the yarn monitoring unit (24.1) assigned to the relevant spinning station (1.1). 16. Arrangement according to one of claims 10 to 15, characterized in that the main line (10) connected to the cooling air flow source (11) is connected with a bypass line (15) and a bypass valve (16), A pressure sensor ( 28 ) is assigned to the main line ( 10 ), and the pressure sensor ( 28 ) and the bypass valve ( 16 ) are coupled to one another via a control device ( 19 ). 17. Device according to one of claims 10 to 15, characterized in that the cooling air flow source (11) is formed by a main blower (29) with a controllable blower drive (30), the main blower ( 29) Connect to the main line (10) for which a pressure sensor (28) is provided and the pressure sensor (28) and the blower drive (30) are coupled to each other via the blower control (31). 18. Device according to one of claims 10 to 17, characterized in that the cooling device (6) of at least one of the spinning stations (1.1, 1.2) has a pressure chamber (8) for each spinneret (39) each have an air-permeable cooling cylinder (35). 19. The device according to claim 18, characterized in that a plurality of cooling pipes (7) are connected to the underside of the pressure chamber (8), said cooling pipes being connected to the extension of the cooling cylinder (35) Cooling cartridge connection.

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