JP5968306B2 - Method and apparatus for melt spinning and cooling a large number of synthetic yarns - Google Patents

Description

The present invention provides a method as set forth in the preamble of claim 1, i.e., in a plurality of spinning stations operating side by side, by extruding and cooling a plurality of yarns group by group, A method for melt spinning and cooling a large number of synthetic yarns by supplying cooling air for cooling a yarn belonging to a spinning station and generating the cooling air by a main fan of an air conditioner, and a premise part of claim 9 To an apparatus for carrying out the method.

  Such a method and apparatus are known, for example, on the basis of WO 2005/052224 A1.

  When a synthetic yarn is produced, usually a large number of synthetic yarns are produced together. The yarns are extruded and cooled by a plurality of spinning stations arranged side by side in one spinning device, especially for handling at the start of the process and at the interruption of the process. Yarns produced by one spinning station are taken up together on a bobbin by a winding device provided at the spinning station. Depending on the properties of the winding device and the number of winding points of the winding device, 8 to 32 yarns can be produced simultaneously in one spinning station. The plurality of spinning stations are operated side by side and installed together in one machine shop. In order to be able to cool the newly extruded yarn at the spinning station, each spinning station is individually supplied with cooling air, which is used by a cooling device for cooling the yarn.

  As disclosed in WO 2005/052224 A1, the cooling air supplied to the spinning station comes from an air conditioner. For this purpose, the air conditioner is connected to a main line, which extends along the spinning station. And the cooling device arrange | positioned at the spinning station is connected to the main pipe line via each supply pipe line. In this way, each spinning station can be supplied with a cooling air stream supplied from one main stream. Inside the spinning station, the cooling air can be supplied to the yarn group as a stream of air blown laterally or as a stream of air blown radially depending on the configuration of the cooling device. However, it is also possible to supply the cooling air as a distributed cooling flow to each individual yarn in the spinning station, with the cooling air being distributed inside the cooling device by means of a plurality of cooling cylinders or blow tubes.

In the known method and the known apparatus, the same cooling air flow is produced at each spinning station, the strength of this cooling air flow being determined mainly by the current process and yarn type. In this case, the cooling air is usually supplied by an air conditioner that supplies the cooling air from one main fan into the main pipeline. The air pressure of the cooling air in the main pipeline has a slight positive pressure, which ensures the supply of cooling air to all spinning stations connected to the main pipeline. .

In order to obtain high process speeds during the production of synthetic yarns, cooling devices have been produced that generate as little relative velocity as possible between the cooling air flow and the yarn. Such a cooling device usually requires a relatively high air pressure of the cooling air, and it has been considered that such air pressure can be prepared by increasing the output of the air conditioner. However, it has been found that the increased air pressure of the cooling air causes problems in devices in air conditioners. For example, the output performance of the main fan is often insufficient to ensure the required cooling air supply. Furthermore, it has been found that the strength of the cooling air guide shaft is insufficient for the increased air pressure of the cooling air.

  Therefore, the object of the present invention is to improve the method and apparatus for extruding and cooling a large number of yarns, as described at the outset, so that the cooling air supply to the spinning station can be appropriately applied to any type of cooling device. It is to provide a method and apparatus that can.

  Another problem of the present invention is that cooling air can be supplied as desired from one common air conditioner to a plurality of spinning stations operating side by side, even when the cooling air demand is different. To provide a method and apparatus for melt spinning and cooling a large number of synthetic yarns.

  The object is solved by a method comprising the features of claim 1 and an apparatus comprising the features of claim 9.

That is, in order to solve the above problems, in the method of the present invention, in a plurality of spinning stations operated side by side, a plurality of yarns are extruded and cooled for each group, and each of the spinning stations belongs to the spinning station. In the method of melt spinning and cooling a large number of synthetic yarns, the cooling air is supplied by a main fan of an air conditioner, and the air pressure of the cooling air is increased by an auxiliary fan . Air was supplied to the at least one of the spinning stations at an increased air pressure.

Further, in the apparatus of the present invention for solving the above-mentioned problems, a plurality of spinning stations each having a single spinning device comprising a plurality of spinning nozzles and a single cooling device, and a main pipe line respectively disposed at the plurality of spinning stations. a plurality supply lines connected to the cooling device, in the device and a supply line in parallel connected to a central main fan of the air conditioner to prepare a cooling air, the main fan At least one auxiliary fan is provided to increase the air pressure of the cooling air, the auxiliary fan being arranged in the main line or in one of the supply lines I did it.

  Further advantageous embodiments of the invention are described in the respective dependent claims.

The method or device according to the invention has the following special advantages. In other words, in the present invention, it is possible to supply cooling air according to the respective demands at the spinning station without changing the main air flow prepared by the air conditioner. As a result, a spinning device in which cooling air is prepared by one air conditioner can be used flexibly. For example, in one of the spinning stations, in order to obtain more through-flow compared to the other spinning stations, according to the method of the present invention, the air pressure of the cooling air is increased by one auxiliary fan and the air pressure is increased. The cooled air thus supplied is supplied to the spinning station. Accordingly, a cooling device having a large amount of cooling air consumption can be operated by a general-purpose air conditioner. The device according to the invention For this purpose, have at least one auxiliary fan is downstream of the main fan, the auxiliary fan is disposed in one of the main conduit or supply line.

In order to obtain a flexible cooling air supply at each spinning station which is supplied with cooling air by the main line, in a preferred embodiment of the method according to the invention, the air pressure of the cooling air is independent of each other for each spinning station. Independent and enhanced by multiple auxiliary fans .

Device according to the invention, therefore has a plurality of auxiliary fans, the auxiliary fans, the have been distributed to the supply line, it is drivingly formed independently of independently of each other.

  It has been found that it is preferable to increase the air pressure of the cooling air to a positive pressure in the range of 700 Pa to 2000 Pa, depending on the configuration of the cooling device. In this way, it is possible to reliably supply cooling air to a pneumatic cooling system that needs to generate a cooling air flow for each yarn.

  In particular, in use cases where a relatively high through-flow rate is used to cool the yarn, it is desirable to change the through-flow rate of the cooling air in relation to the respective operating conditions. Therefore, in a preferred embodiment of the method according to the invention, the flow rate of the cooling air is changed individually in one of the spinning stations when the operating state of the spinning station changes.

  In particular, at the start of the process of spinning and yarn application, it is necessary to reduce the flow rate of cooling air, so in a preferred embodiment of the method according to the invention, the flow rate of cooling air at the spinning station is The cooling air is adjusted between a pause amount and an operating amount of the cooling air.

  As soon as spinning and yarn application takes place at the spinning station, the cooling air supply can be adjusted to the operating amount of cooling air, which starts the cooling required for yarn production.

The adjustment of the through-flow rate is preferably performed directly by an auxiliary fan . However, it is also possible to adjust the flow rate of the cooling air by means of a throttle flap which is arranged in the spinning station and acts directly in the supply line.

  Depending on the degree of automation, the aperture flap may be operated manually by an operator or may be actuated electrically via an adjustment actuator.

In a preferred embodiment of the method according to the invention, the basic supply of cooling air causes the main fan to generate air pressure of the cooling air supplied to all spinning stations in the positive pressure range of 400 Pa to 700 Pa. If it does in this way, the spinning station which requires only a slight through-flow rate of cooling air inside the spinning device can be connected to the main supply section. A plurality of spinning stations, preferably having different configurations, can also be connected to one air conditioner. Furthermore, at the time of adjustment based on the operating conditions, the cooling air pause amount can be directly prepared by the air conditioner without the operation of the auxiliary fan .

Device according to the invention, for carrying out the method according to the invention, at least one auxiliary fan is downstream of the said main fan has to increase the pressure of the cooling air, the auxiliary fan, the It is arranged in the main pipeline or in one of the supply pipelines.

Usually, the spinning stations are configured identically in the entire spinning apparatus for producing synthetic yarns, and thus the yarns produced in these spinning stations are cooled by cooling devices formed in the same manner. Thus, in a preferred embodiment of the device according to the invention, there are provided a plurality of auxiliary fans , each distributed in the supply line and formed independently drivable.

The auxiliary fan in this case is preferably drivable by a plurality of fan motors independently of each other.

Furthermore, the fan motors can be operated individually by means of respective arranged controllers, so that the adjustment of the flow rate of the cooling air can be carried out directly by the auxiliary fan . In order to be able to prepare a uniform amount of cooling air, in a particularly preferred embodiment of the device according to the invention, a plurality of pressure sensors are distributed in the supply line, the pressure sensors and the fan motor. The controller is incorporated in each control circuit for controlling the auxiliary fan . In this way, a continuous and uniform cooling air supply can be adjusted before each spinning station.

  Furthermore, the incorporation of a controller in one adjustment control unit is preferred in order to be able to adjust the cooling air supply in relation to the operating conditions of the spinning station. In another preferred embodiment of the device according to the invention, the regulation control unit is connected to the yarn monitoring unit, which makes it possible to switch the cooling air supply immediately when a yarn break occurs and when the process is interrupted. Can do.

  As an alternative, it is also possible to adjust the flow rate of the cooling air by means of one throttle flap for each spinning station, such throttle flaps being distributed in each supply line and manually operated. Or electrically actuated.

  The method and apparatus according to the present invention will now be described in detail with reference to the drawings for several embodiments of the apparatus according to the present invention.

1 shows a first embodiment of a device according to the invention for carrying out a method according to the invention. FIG. 2 shows the throttle flap of the embodiment shown in FIG. 1 at different positions, which serves to adjust the flow rate. FIG. 3 shows another embodiment of the device according to the invention for carrying out the method according to the invention. FIG. 6 shows a further embodiment of the device according to the invention for carrying out the method according to the invention. FIG. 6 shows a further embodiment of the device according to the invention for carrying out the method according to the invention. FIG. 2 shows a spinning station of one embodiment of the apparatus according to the invention.

  FIG. 1 schematically shows a first embodiment of the device according to the invention for carrying out the method according to the invention. In this embodiment, only two spinning stations for producing two yarn groups, each consisting of five yarns, are shown for the sake of clarity. Usually, a plurality of such spinning stations are arranged side by side, whereby a large number of synthetic yarns can be produced. The number of yarns at each spinning station is also an example. Usually at least 6 to a maximum of 32 yarns are extruded in parallel and cooled in one spinning station.

  In the embodiment shown in FIG. 1, spinning stations 1.1, 1.2 are arranged side by side. The spinning stations 1.1, 1.2 are formed identically. Each spinning station 1.1, 1.2 has one spinning beam 2 and one cooling device 6 arranged under the spinning beam 2. The spinning beam 2 has a spinning pump 3 on its upper side, and this spinning pump 3 is connected to a melt source (not shown) via a melt supply unit 4. The spinning pump 3 is formed as a multiple pump and is driven via a drive shaft 5.

  The spinning pump 3 is connected to a plurality of spinning nozzles via a distribution system arranged inside the spinning beam 2 to be heated, and these spinning nozzles are held below the spinning beam 2. (Not shown).

  The cooling device 6 disposed below the spinning beam 2 is formed by one pressure chamber 8 and a plurality of cooling pipes 7 connected to the lower side of the pressure chamber 8 in the illustrated embodiment. In this case, each one cooling pipe 7 is arranged in one spinning nozzle (not shown), respectively, so that each filament group of one yarn can be cooled. For example, the thread 27 for each cooling pipe 7 is guided by a thread guide 34 disposed under the cooling pipe 7.

In order to supply cooling air to the cooling device 6 at the spinning stations 1.1, 1.2, one supply line 9.1, 9.2 is respectively provided at the spinning station 1.1, 1.2. ing. The supply lines 9.1, 9.2 open into the pressure chamber 8 of the cooling device 6 of each spinning station 1.1, 1.2. The supply pipelines 9.1 and 9.2 are connected to the main pipeline 10 at opposite ends. The main line 10 is connected to an air conditioner 11, and the main flow of cooling air is generated in the main line 10 by the air conditioner 11. For this purpose, the air conditioner 11 has a main fan 12 driven by a fan driving device 30.

An auxiliary fan 29 is disposed in the main line 10 immediately before the branching portion of the supply lines 9.1 and 9.2, and this auxiliary fan 29 is placed behind the main fan 12, that is, downstream of the main fan 12. Arranged on the side. The auxiliary fan 29 is driven via a fan motor 33 controlled via the controller 18. The controller 18 is connected to the control device 19.

  Each supply line 9.1, 9.2 is provided with a respective throttle flap 13.1, 13.2, whereby the spinning station passes through the supply lines 9.1, 9.2, respectively. The through-flow rate of the cooling air supplied to 1.1 and 1.2 can be adjusted. In the illustrated embodiment, the throttle flap 13.1 is configured to be manually adjustable and has a handle wheel 14 for adjusting the throttle flap 13.1. On the other hand, the throttle flap 13.2 is formed so as to be electrically adjustable. In this case, the throttle flap 13.2 is adjusted by the valve actuator 21 and the valve control device 22. This valve control device 22 is in this case preferably actuated via an operating station or control device.

  It should be clearly noted here that the throttle flaps 13.1, 13.2 are preferably configured identically in all spinning stations 1.1, 1.2. The illustrated embodiment merely exemplifies that the aperture flap can be configured to be manually adjustable or electrically adjustable.

  The main pipeline 10 connected to the air conditioner 11 extends over a plurality of spinning stations. Accordingly, at least one supply line is connected to the main line 10 for each spinning station.

  In the embodiment shown in FIG. 1, a plurality of yarns are extruded from the polymer melt fed in parallel at the spinning stations 1.1 and 1.2, respectively, and then cooled. After cooling the yarns, they are drawn through a godet system (not shown), drawn and then wound on a bobbin. For this purpose, each spinning station 1.1, 1.2 is provided with a godet system and a winding device (not shown). At each spinning station 1.1, 1.2, a group of yarns can be produced continuously from the polymer melt.

In order to cool the yarn, cooling air having an air temperature in the range of 15 ° C. to 75 ° C. is prepared by the air conditioner 11, and this cooling air is blown into the main pipeline 10 by the main fan 12. In this case, the cooling air is guided in the main line 10 in a slightly positive pressure state preferably in the range of 200 Pa to 700 Pa.

In order to be able to prepare a relatively large flow rate of cooling air for each spinning station 1.1, 1.2, the pressure of the cooling air is increased via the auxiliary fan 29. The air pressure of the cooling air in the main pipeline 10 can be increased to a positive pressure in the range of 700 Pa to 2000 Pa by the auxiliary fan 29. As a result, cooling air having an increased air pressure is prepared via the supply pipelines 9.1 and 9.2 of each cooling device 6.

  Depending on the operating conditions of the spinning station 1.1 or 1.2, a predetermined penetration of the cooling air is achieved via the respective throttle flaps 13.1, 13.2 arranged in the supply lines 9.1, 9.2. The flow rate is adjusted and supplied to the cooling device 6. Accordingly, the throttle flaps 13.1, 13.2 are each adjusted to the first switching position in order to adjust the required through-flow rate.

  At the start of the process or after a yarn break, it is necessary to apply the yarn to the godet system and the winding device. Since this application operation is performed with the production speed reduced, the flow rate of the cooling air in the cooling device 6 adjusted to the production speed prevents and impedes the application operation. Become. Similarly, special requirements are imposed on the spinning start operation at the start of the process so that the newly extruded yarn can be guided individually through the cooling pipe 7. Therefore, it is necessary to adjust the supply of cooling air to the cooling device 6 to change the through-flow rate. For example, the cooling air supply in the supply line 9.1 can be adjusted to a predetermined operating amount or pause amount of the cooling air by the throttle flap 13.1. This predetermined operating amount of cooling air is used to cool the yarn, and is preferably less than the predetermined operating amount, and the cooling air pause amount is adjusted when the process is interrupted or when the process is started. This optimizes the new application of the yarn, so that a short interruption time can be realized.

  FIG. 2 illustrates different switching positions of the throttle flap 13.1 in the supply line 9.1. These switching positions are in this case obtained by different positions of the throttle flap 13.1 inside the supply line 9.1. For example, FIG. 2.1 shows the throttle flap 13.1 in its fully open state, so that the flow rate of cooling air supplied passes through the throttle flap 13.1 unimpeded. be able to.

  FIG. 2.2 shows the changed position of the throttle flap 13.1, in this case inside the supply line 9.1, the reduced open cross section is opened by the throttle flap 13.1. ing. This adjusts the reduced flow rate of the cooling air. This position can be used, for example, to adjust the amount of cooling air pause at the spinning station.

  FIG. 2.3 shows the closed position of the throttle flap 13.1, whereby the cooling air supply in the supply line 9.1 is interrupted and thus the spinning station 1.1 is cooled. Air is not supplied. This position can preferably be adjusted during maintenance work at the spinning station.

In the embodiment shown in FIG. 1, the central supply of cooling air in the main line 10 can be further improved by the pressure sensor 28 being arranged in the main line 10. The pressure sensor 28 is shown in broken lines in FIG. The pressure sensor 28 is connected to the control device 19, in which the air pressure signaled by the pressure sensor 28 is compared with a target value and an actual value. As soon as an undesired drop or undesirably excessive rise in the cooling air occurs in the main duct 10, the output of the auxiliary fan 29 is changed by the control device 19. For this purpose, the controller 18 receives a corresponding control command from the control device 19 so that the fan motor 33 drives the auxiliary fan 29 at an increased or reduced speed. Such selective control of the central cooling air supply is particularly advantageous in order to be able to equalize individual adjustments in the plurality of spinning stations.

  In the embodiment shown in FIG. 1, the adjustment of the cooling air at the spinning stations 1.1, 1.2 is preferably performed manually by an operator. In principle, however, such adjustments can also be performed automatically and integrated into the machine control concept.

  For this purpose, another embodiment is shown in FIG. 3, and this embodiment is almost the same as the embodiment shown in FIG. 1 in its structure. In the following, only the differences will be described.

The spinning stations 1.1 and 1.2 are configured in the same way as the embodiment shown in FIG. 1 and each have one cooling device 6. Cooling air supply of the cooling device 6 is performed via a central air conditioning device 11, and this air conditioning device 11 supplies cooling air from the main fan 12 into the main duct 10. The main line 10 is connected to the cooling devices 6 of the spinning stations 1.1 and 1.2 via supply lines 9.1 and 9.2, respectively. Auxiliary fans 29.1 and 29.2 are arranged in the supply pipelines 9.1 and 9.2, respectively. These auxiliary fan 29.1,29.2 are each driven by a separate fan motor 33.1, 33.2, controller of each of these fan motors 33.1, 33.2 Affiliated 18.1,18 Controlled by .2. These controllers 18.1, 18.2 are connected to a central control device 19.

Each spinning station 1.1, 1.2 has operating stations 20.1, 20.2, which are connected to the control device 19. For example, in order to be able to adjust the predetermined flow rate of the cooling air via the auxiliary fans 29.1, 29.2, control instructions are entered by the operator via the operating stations 20.1, 20.2. be able to. Similarly, the adjustment of the cooling air supply associated with the operating state of each spinning station can be preset via the operating stations 20.1, 20.2. In order to be able to keep the basic supply of cooling air via the air conditioner at a prescribed level, the main line 10 is additionally provided with a bypass line 15 and a bypass valve 16 in the area of the air conditioner 11. ing. Since the bypass pipe line 15 opens to the periphery, the secondary flow of the cooling air can be discharged directly from the main pipe line 10 by the bypass valve 16. The bypass valve 16 can be controlled via a valve actuator 21, which is controlled via a valve control device 22. The valve control device 22 is connected to the control device 19.

A pressure sensor 28 is provided further downstream of the main conduit 10 from the bypass conduit 15. The pressure sensor 28 is connected to the control device 19 and is blown into the main conduit 10 by the main fan 12. Measure the air pressure of the cooling air. In the control device 19, the pressure signal supplied from the pressure sensor 28 can always be monitored, and the corresponding valve control in the bypass valve 16 can be performed in connection with the comparison between the actual value and the target value. it can. Thereby, cooling air can be appropriately supplied to all connected spinning stations 1.1 and 1.2.

  More specifically, to control the cooling air supply, the bypass valve shown in FIG. 3 is combined with a motor controlled throttle flap or a manually controlled throttle flap as shown in FIG. It is also possible.

  In order to be able to incorporate the phenomenon in the spinning station into the control concept before reaching the winding of the yarn, yet another embodiment is shown in FIG. Since the structure is almost the same as that of the embodiment shown in FIG. 3, the description already given will be referred to for the same configuration, and only the difference will be described below.

In the embodiment shown in FIG. 4, the godet systems 25.1, 25.2 and winding devices 26.1, 26.2 arranged at the spinning stations 1.1, 1.2 are schematically shown. Yes. The godet system 25.1, 25.2 is normally arranged immediately below the cooling device 6 at the spinning station 1.1, 1.2 so that the yarn group can be drawn out of the cooling device 6. . The godet system 25.1, 25.2 is followed by winding devices 26.1, 26.2, in which the yarns are respectively parallel to each other on the bobbin. It is wound up. A yarn monitoring unit 24.1 is arranged between the godet system 25.1 and the winding device 26.1 so that, for example, yarn breakage can be detected. The yarn monitoring unit 24.1 is connected to an adjustment control unit 23.1, which is arranged in the spinning station 1.1 and connected to the operation station 20.1. The adjustment control unit 23.1 is also connected to the controller 18.1 of the fan motor 33.1 in order to control the auxiliary fan 29.1 in the supply line 9.1. In order to be able to maintain a predetermined positive pressure in the supply line 9.1 when the cooling air is supplied, a pressure sensor 28.1 is provided, which is provided in the supply line 9.1 as an auxiliary. It is placed behind the fan 29.1. The pressure sensor 28.1 is connected to the adjustment control unit 23.1. As a result, in the regulation control unit 23.1, the actual air pressure and the target value are analyzed, whereby the predetermined air pressure of the cooling air is set to the predetermined value directly when the cooling air is supplied to the cooling device 6 in the spinning station 1.1. Can be kept in range.

As with the spinning station 1.1, the spinning station 1.2 is also provided with an adjusting control unit 23.2, which comprises an operating station 20.2, a yarn monitoring unit 24.2. , Connected to a pressure sensor 28.2 and a controller 18.2. Due to the additional connection with the yarn monitoring unit, the adjustment of the cooling air flow of the cooling air at the spinning station can be automated, so that the corresponding auxiliary fan 29.1 or 29.2 is immediately available upon recognition of the yarn breakage. A varied adjustment of the cooling air flow through can be carried out. After the elimination of process faults and the application of new yarns, the operating station 20.1 or 20.2 increases the auxiliary fans 29.1, 29.2 via the adjustment control units 23.1, 23.2, respectively. The return to the supplied cooling air supply can be adjusted.

In the embodiment of FIG. 4, the air conditioner 11 is similarly provided with a main fan 12 for the basic supply of cooling air in the main pipeline 10, and the main fan 12 is driven via a fan drive device 30. Is done. The case fan drive 30, have the main fan controller 17 is disposed, the main fan controller 17 can vary the cooling air flow which is caused by the main fan 12. The main fan control device 17 is connected to a central control device (not shown).

  As already mentioned at the outset, such an embodiment is preferably operated with a plurality of spinning stations arranged in a row. In this case, it is usual that not all spinning stations are formed identically, so that different cooling devices are used, for example, for cooling the yarn. Nevertheless, in order to be able to individually adjust the cooling air flow at a particular spinning station, a further embodiment is shown in FIG. In the embodiment shown in FIG. 5, a first three spinning stations are shown, in which the spinning stations 1.1, 1.2 are formed identically to the spinning stations in the previously described embodiments. . On the other hand, the spinning station 1.3 has a cooling device 6 that does not use a cooling pipe for cooling the yarn. The spinning stations 1.1, 1.2 are configured in the same way as the spinning stations 1.1, 1.2 in the embodiment of FIG.

In contrast, the spinning station 1.3 is connected to the main line 10 via a supply line 9.3. In this case, the cooling air supplied to the spinning station 1.3 is determined only by adjusting the main fan 12 of the air conditioner 11. This cooling air supply generated by the air conditioner is accepted as a basic supply at the spinning stations 1.1, 1.2 and is reinforced by the auxiliary fans 29.1, 29.2.

Air conditioning system 11 in FIG. 5, additionally equipped with a fan control device 31, the fan control unit 31 acts on the main fan control unit 17 of the main fan 12. The main pipe line 10 is provided with a pressure sensor 28.3, and the pressure sensor 28.3 continuously detects the air pressure of the cooling air generated by the main fan 12. The pressure signal of the pressure sensor 28.3 is input to the fan control device 31, whereby the fan driving device 30 can be controlled to correspond to the output desired in the main fan 12.

  FIG. 6 shows an embodiment of a spinning station that can be suitably used, for example, in the embodiment shown in FIGS. This embodiment of the spinning station has a spinning beam 2 which holds a plurality of spinning nozzles 38, which are connected to a spinning pump via a distribution line system 39. 3 is connected. The spinning beam 2 is formed so as to be capable of heating in order to heat the component that guides the melt.

  A pressure chamber 8 is disposed below the spinning beam 2, and the pressure chamber 8 is held by an elevating device 40 so that the height relative to the spinning beam 2 can be adjusted. In this embodiment, the pressure chamber 8 has an upper chamber 35 and a lower chamber 36, and the upper chamber 35 and the lower chamber 36 are separated from each other by a gas permeable intermediate wall 41. The supply line 9.1 is connected to the lower chamber 36 of the pressure chamber 8, whereby the cooling air flow flowing into the lower chamber 36 is distributed to the upper chamber 35. Inside the upper chamber 35, cooling cylinders 34 are arranged coaxially with respect to the spinning nozzle 38, and these cooling cylinders 34 have gas-permeable walls. Each cooling cylinder 34 surrounds a bundle of filaments produced by a spinning nozzle, and the bundles of filaments are combined into a single thread as usual. With the above arrangement, the cooling air flow that has reached the upper chamber 35 is distributed through the cooling cylinder 34 and supplied to the extruded filament bundle as a partial flow.

  A tube piece 37 and a cooling pipe 7 are provided in the extended part of the cooling cylinder 34 in order to cool the filament. The pipe piece 37 penetrates the lower chamber 36, and the cooling pipe 7 is held below the lower chamber 36. The cooling pipe 7 has a reduced cross section in its extending direction, so that the partial flow introduced through the cooling cylinder 34 is further accelerated, thereby obtaining the highest possible spinning speed. Can do.

In order to be able to cool a large number of yarns uniformly with the cooling air flow supplied to the spinning station, a high through-flow rate of the cooling air is required, which for example ranges from 40 to 120 m ³ / h. It may be. For this purpose, cooling air at a positive pressure in the range of 700 Pa to 2000 Pa is required.

  In the embodiment shown in FIG. 6, the control of the lifting device 40 is preferably likewise in the central control device 19 or the adjustment control unit 23.1 or to disconnect the cooling device 6 from the spinning beam 2, for example during a maintenance cycle. 23.2, so that the adjustment of the flow rate of the cooling air can be carried out in connection with the control of the lifting device 40.

The embodiment of the spinning station shown in FIG. 6 is merely an example. In principle, the spinning station formed in the device according to the invention and the spinning station operated by the method according to the invention can also have a cooling device without cooling tubes. For example, it is possible to operate suitably using a cooling device that uses a blowing wall to guide the cooling air flow to the yarn group from the lateral direction. In a particularly preferred embodiment, a cooling device can be used in which individual yarns are cooled using a Blaskerze. What is important in this case is that the cooling air supply can be individually adapted by the auxiliary fan , independently of the central air conditioner. For example, a large flow rate of the cooling air can be realized by a correspondingly high air pressure of the cooling air.

The embodiment shown in FIGS. 3 to 5 may be further configured as follows in order to adjust the flow rate of the cooling air. In other words, in the variant embodiment, a throttle flap known from the embodiment shown in FIG. 1 is additionally used in the supply line. In this case, for example, a throttle flap is placed behind each auxiliary fan , so that flexible adjustability for the purpose of adjusting the cooling air supply at each spinning station can be obtained.

1.1, 1.2, 1.3 Spinning station 2 Spinning beam 3 Spinning pump 4 Melt supply unit 5 Drive shaft 6 Cooling device 7 Cooling tube 8 Pressure chamber 9.1, 9.2, 9.3 Supply line DESCRIPTION OF SYMBOLS 10 Main line 11 Air conditioner 12 Main fan 13.1, 13.2 Restriction flap 14 Handle wheel 15 Bypass line 16 Bypass valve 17 Main fan control device 18, 18.1, 18.2 Controller 19 Control device 20.1 , 20.2 Operation station 21 Valve actuator 22 Valve control device 23.1, 23.2 Adjustment control unit 24.1, 24.2 Thread monitoring unit 25.1, 25.2 Godet system 26.1, 26.2 winding apparatus 27 yarn 28,28.1,28.2 pressure sensor 29,29.1,29.2 auxiliary fan 30 fan drive 31 fan control unit 32 the yarn guide 33,33.1,33.2 fan motor Data 34 Cooling cylinder 35 Upper chamber 36 Lower chamber 37 Pipe piece 38 Spinning nozzle 39 Distribution pipe system 40 Lifting device 41 Intermediate wall

Claims (12)

In a plurality of spinning stations operated side by side, a plurality of yarns are extruded and cooled in groups, and cooling air for cooling the yarns belonging to the spinning stations is supplied to the spinning stations. Is produced by a main fan of an air conditioner, a method of melt spinning and cooling a large number of synthetic yarns,
The cooling air pressure is increased by an auxiliary fan, and the cooling air is supplied to at least one of the spinning stations with the increased air pressure, and the cooling air flow is supplied to the cooling device of each spinning station, The auxiliary fan is disposed downstream of the main fan, and the cooling air generated by the main fan passes through the auxiliary fan before being supplied to the cooling device of each spinning station, and the cooling air A method for melt spinning and cooling a large number of synthetic yarns, characterized in that the through-flow rate is individually changed in one of the spinning stations when the operating state of the spinning station changes .   The method of claim 1, wherein the air pressure of the cooling air is increased by a plurality of the auxiliary fans independently of each other for each spinning station. 3. A method according to claim 1 or 2 , wherein the flow rate of the cooling air is adjusted by one of the auxiliary fans and / or a throttle flap in a supply line connected to the spinning station. 4. A method according to claim 3 , wherein the aperture flap is operated manually or by an electric adjustment actuator. The method according to any one of claims 1 to 4 , wherein the main fan generates the air pressure of the cooling air supplied to all spinning stations in a positive pressure range of 400 Pa to 700 Pa. In a plurality of spinning stations operated side by side, a plurality of yarns are extruded and cooled in groups, and cooling air for cooling the yarns belonging to the spinning stations is supplied to the spinning stations. Produced by the main fan of the air conditioner,
The cooling air pressure is increased by an auxiliary fan, and the cooling air is supplied to at least one of the spinning stations with the increased air pressure, and the cooling air flow is supplied to the cooling device of each spinning station, The auxiliary fan is arranged downstream of the main fan, and the cooling air generated by the main fan passes through the auxiliary fan before being supplied to the cooling device at each spinning station. An apparatus for carrying out a method for melt spinning and cooling a yarn,
A plurality of spinning stations (1.1, 1.2) each having a spinning device (2) comprising a plurality of spinning nozzles (38) and a cooling device (6);
A plurality of supply lines (9.1, 9.2) respectively disposed at the plurality of spinning stations (1.1, 1.2) and connected to the main line (10), A supply line (9.1, 9.2) for connecting the device (6) in parallel with the central main fan (12) of the air conditioner (11) for preparing cooling air ,
At least one auxiliary fan (29) disposed behind the main fan (12) is provided to increase the air pressure of the cooling air, and the auxiliary fan (29) is provided in the main pipe line (10) or A device for melt spinning and cooling a large number of synthetic yarns, characterized in that it is arranged in one of the supply lines (9.1, 9.2). A plurality of auxiliary fans (29.1, 29.2) are provided, and the auxiliary fans (29.1, 29.2) are distributed to the supply pipes (9.1, 9.2). 7. The device according to claim 6 , wherein the device is configured to be driven independently of each other. The device according to claim 7 , wherein the auxiliary fan (29.1, 29.2) can be driven by a plurality of fan motors (33.1, 33.2) independently of each other. The fan motor (33.1, 33.2) are disposed a plurality of controllers (18.1, 18.2) is that is controllably formed independently of independently of one another, according to claim 8 The device described. A plurality of pressure sensors (28.1, 28.2) are distributed in the supply line (9.1, 9.2), and the pressure sensors (28.1, 28.2) and the control are arranged. 10. A device according to claim 9 , wherein a vessel (18.1, 18) is incorporated in each control circuit for controlling the auxiliary fan (29.1, 29.2). Inside one of the spinning stations (1.1, 1.2), the controller (18.1, 18.2) of the fan motor (33.1, 33.2) is connected to an adjustment control unit (23 is connected to .1,23.2), said modulation control unit (23.1, 23.2) is connected to the yarn monitoring unit (24.1, 24.2), claims 7 10 The device according to any one of the above. A plurality of throttle flaps (13.1, 13.2) are provided, and the throttle flaps (13.1, 13.2) are distributed to the supply lines (9.1, 9.2). Te, manual or is operably formed by a respective one valve actuator (21), the apparatus of any one of claims 6 to 11.

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