EP1725702B1 - Device for melt spinning and cooling - Google Patents

Abstract

The invention relates to a device for melt spinning and cooling a plurality of synthetic filaments. The device comprises a spinning device and a cooling device, wherein the spinning device has at least one spinneret for extruding the filaments. A perforated cylinder arranged below the spinneret and having a gas-permeable casing is provided in order to cool the recently extruded filaments. A U-shaped baffle plate is assigned to the perforated cylinder, said baffle plate partly surrounding the casing and forming a blow hole on one end. he blow hole is connected to a cooling flow generator that blows cooling air flowing crosswise relative to the running direction of the filaments into the blow hole. In order to distribute cooling air as evenly as possible along the periphery of the perforated cylinder, a current divider is arranged in the blow hole through which the cooling air entering the blow hole is divided before it reaches the perforated cylinder.

Description

The invention relates to an apparatus for melt spinning and cooling a plurality of synthetic filaments according to the preamble of claim 1.

In the production of synthetic fibers, especially synthetic threads for textile applications, a plurality of fine filament strands are extruded through a spinneret from a plastic melt. For this purpose, the spinnerets have on their undersides a plurality of nozzle bores in a certain arrangement and distribution. After extrusion, the freshly spun filament strands are cooled to solidify. After the cooling process, a plurality of the filament strands are usually combined into the filament strands extruded through the spinneret to form a multifilament thread, which is wound into a spool after further treatments at the end of the production process. Depending on the application, very fine threads or thicker threads can thus be produced. The total titer of the thread results from the number of individual filament strands and the filament titer. The quality of the thread is determined by the interaction of the filament properties. Therefore, it is known that in order to produce a high-quality yarn, each individual filament strand within the filament bundle must undergo the same treatment as possible in order to obtain the same structures and cross-sections.

The formation of the filament strands is significantly determined immediately after the extrusion by the cooling. It is thus known that the so-called transverse flow blowing, in which a cooling air flow oriented transversely to the yarn running direction of the filament strands and penetrating the filament bundle, is suitable only for filament strands having a spin titer of above 1 dpf (dtex per filament). With finer filament strands on the one hand, a higher filament density is achieved within the filament bundle, which leads to a leads uneven penetration of the cooling air flow, and on the other hand causes a conditional caused by the Querstromanblasung large deflection of the filament bundle, which lead to impermissible titer fluctuations in the filament strands. Therefore, filaments having a spin titer of <Idpf are preferably cooled with a radial blowing after the extrusion. In radial blowing, a cooling air flow uniformly generated from inside to outside or from outside to inside over the entire circumference of the radial bundle is used to cool the filaments. However, such devices basically have the disadvantage that when producing a plurality of threads each of the threads must be cooled separately by a radially generated cooling air flow. In contrast, the cross-flow blowing is advantageous also suitable for cooling a plurality of parallel filament bundles.

In order to obtain a uniform as possible formation of the filament strands in a cross-flow blowing, is from the US 3,067,458 a device is known in which a screen cylinder for guiding the freshly extruded filament strands is provided directly below a spinneret in a cooling shaft. The screen cylinder has a gas-permeable jacket. At a distance from the gas-permeable jacket, a U-shaped baffle is arranged, which has an opening to one side of the screen cylinder. The opening is connected to a cooling flow generator, through which a cooling air flow is injected into the opening transverse to the screen cylinder. Below the screen cylinder, the filament strands enter the cooling shaft in which a transverse cooling air flow is generated for further cooling of the filament strands.

By the known device, the filament strands receive a gentle cooling immediately after the extrusion, so that a pre-solidification of the edge layers of the filament strands begins before the final cooling takes place by the transverse cooling air flow. Although a slight improvement in the production of fine filament strands could be achieved, however Uneven flow of the filament strands within the screen cylinder was noted, resulting in titer variations in the filaments.

From the US 4,529,368 Another apparatus for melt-spinning and cooling a plurality of filament strands is known in which the filament strands are cooled by a cross-flow blowing. For preconsolidation, a screen cylinder with a pipe section attached opposite the spinneret is arranged in the cooling shaft below the spinnerets. Laterally to the screen cylinder, a blowing wall is provided, which extends over the entire cooling duct length and which is connected to a pressure chamber. Through the blowing wall a transverse cooling air flow is generated, which acts directly on the filament strands in the lower region and acts transversely on the screen cylinder in the upper region. Due to the transverse cooling air flow in the screen cylinder, however, there is basically the problem that at high filament density, the filament bundle can be insufficiently pre-cooled to the filament strands furthest away from the blowing wall. Thus, high uniformities can not be achieved, especially with fine filament strands.

It is an object of the invention to develop a device for melt spinning and cooling a plurality of synthetic filaments of the generic type such that in particular filament strands can be cooled evenly in a titer range of 0.2 to 1 dpf by a transverse cooling air flow.

This object is achieved by a device having the features of claim 1.

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

The invention is characterized in that a cooling air flow flowing transversely to the direction of filaments is advantageously brought to the screen cylinder in such a way that the cooling air enters substantially uniformly around the circumference of the screen cylinder. By arranged in the blow opening flow divider direct direct blowing of the screen cylinder is prevented. The cooling air flow is blown substantially in the space between the shell of the screen cylinder and the baffle, so that a flow around the screen cylinder is generated. This results in a uniform distribution of the cooling air over the entire shell of the screen cylinder, so that the cooling air can enter uniformly in the screen cylinder through the gas-permeable jacket and meet the filaments. The distribution of the cooling air can be effected both by a flow divider or by a plurality of co-operating flow divider.

The flow divider can be advantageously formed by a plurality of arranged guide plates, which are preferably formed from two mutually angularly arranged individual plates, are held in the middle of the blow opening and extending substantially over the length of the screen cylinder. As a result, a gentle division of the cooling air flow arriving in the blow opening is produced without significant turbulence formation. The guide plates could be designed to change the angle of attack adjustable to each other. In addition, can be formed by selecting the width of the guide plates each have different inlet cross-sections between the guide plate ends and the baffle, which in particular affects the flow velocity in the space between the shell of the screen cylinder and baffle. However, it is also possible to form the flow divider by a shaped sheet which is kept placed in the blow opening.

Preferably, the flow divider has a passage opening in the middle, through which a part of the cooling air is passed directly to the screen cylinder. This can produce a further partial air flow, which allows a further improvement in the uniformity of the cooling air distribution. In particular, in the case where the cooling air introduced into the intermediate space by the flow divider has low flow velocities has, can be achieved by the development of an advantageous uniform distribution over the jacket of the screen cylinder. However, the passage opening can also be formed by a plurality of separate openings or by a perforated plate structure.

The device according to the invention can be used for various processes for cooling filament strands. Thus, methods are known in which the further cooling of the filament strands is effected by a transverse cooling air flow or by a cooling air flow guided in the thread running direction. In the event that the filament strands are cooled in the further course by a transverse cooling air flow, the development of the invention is to be used particularly advantageously, in which the screen cylinder is connected to the outlet side with the cooling shaft, which cooling shaft a distance from the screen cylinder lower thread outlet having.

In the event that a cooling air flow generated in the thread running direction of the filaments serves for further cooling of the filament strands, the development of the invention is preferred in which the screen cylinder is connected on the outlet side to a cooling tube which has a funnel-shaped inlet for constricting the free flow cross section. This makes it possible to achieve a special guidance and cooling of the filament strands, which leads to higher production speeds and production outputs.

To produce the transverse cooling air flow, the cooling flow generator is preferably formed by a pressure chamber and a blower connected to the pressure chamber. In this case, the pressure chamber may be connected directly to the blow opening or indirectly via a blowing wall, which advantageously extends over the entire length of the cooling shaft and injects a transverse cooling air flow into the cooling shaft and the blow opening.

In order to prevent the entry of the filament strands after extruding into the screen cylinder no extraneous air, a sealing device is advantageously provided on the inlet side of the screen cylinder through which the screen cylinder is sealingly connected to a nozzle carrier of the spinneret.

Since such devices are used in practice for the simultaneous production of multiple filament bundles, the screen cylinder associated with the spinnerets are advantageously held together with the baffles together on a support in the cooling shaft. In this case, the carrier is preferably height-adjustable or exchangeably connected to the cooling shaft, so that for the purpose of maintenance work on the spinnerets, the screen cylinder can be removed in a simple manner from the nozzle carrier of the spinnerets.

According to an advantageous embodiment of the invention, the carrier can optionally be equipped with additional cooling tubes, which are each connected to the outlet sides of the screen cylinder. Thus, different methods for cooling the filament strands of a device can be used.

For this purpose, the cooling shaft on the side facing the blowing openings on a replaceable blowing wall, which is connected to the pressure chamber. The blower wall can be exchanged for a cassette wall, which has a cooling air opening in the region of the blow opening, which is connected directly to the pressure chamber. Thus, the device according to the invention can optionally be used for different cooling methods.

Further advantages of the invention are explained in more detail below with reference to some embodiments of the device according to the invention with reference to the accompanying drawings.

Fig. 1 bis Fig. 3

schematisch ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zu Abkühlung eines Filamentbündels

Fig. 4

schematisch ein weiteres Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zur Abkühlung eines Filamentbündels

Fig. 5 und 6

schematisch weitere Ausführungsbeispiele der erfindungsgemäßen Vorrichtung zur Abkühlung mehrerer Filamentbündel

They show:

Fig. 1 to Fig. 3

schematically a first embodiment of the device according to the invention for cooling a filament bundle

Fig. 4

schematically another embodiment of the inventive device for cooling a filament bundle

FIGS. 5 and 6

schematically further embodiments of the device according to the invention for cooling a plurality of filament bundles

In Fig. 1 to Fig. 3 a first embodiment of the inventive device for cooling a filament bundle is shown in several views. In Fig. 1 the embodiment is in a longitudinal sectional view, in Fig. 2 in a cross-sectional view and in Fig. 3 shown in a partial view of the blow opening. Unless expressly made to any of the figures, the following description applies to all figures.

The embodiment consists of a spinning device 1 and a cooling device 2. The spinning device 1 has a spinneret 3, which is held in a heatable nozzle carrier 4. The spinneret 3 is connected in its upper side with a melt line 5. The melt line 5 leads to a spinning pump, which is not shown here. On the underside of the spinneret 3 are a plurality of nozzle bores (not shown in detail here) to extrude a plurality of fine filament strands 16.

Below the spinning device 1, the cooling device 2 is arranged. The cooling device 2 has a cuboid cooling shaft 6. On one side of the cooling shaft 6, a pressure chamber 7 is formed, which is connected to a fan 9. The pressure chamber 7 is connected by a blowing wall 8 with the cooling shaft 6. The Blasw and 8 is gas permeable, so that a preferably introduced in the pressure chamber 7 by the fan 9 cooling medium Cooling air flows through the blowing wall 8 transversely to the direction of the filaments 16 in the cooling shaft 6. In the upper region of the cooling shaft 6, a screen cylinder 10 with a gas-permeable jacket 19 is held immediately below the nozzle carrier 4. The jacket 19 could be formed from a perforated plate, a sintered metal or a wire mesh. At a distance from the jacket 19 of the screen cylinder 10, a U-shaped baffle 11 is arranged. Here, the free legs of the guide plate 11 in the direction of the blowing wall 8 and between them form a blow opening 25. The screen cylinder 10 is partially enclosed by the guide plate 11, wherein a semi-annular space 20 between the screen cylinder 10 and the baffle 11 is formed. The baffle 11, which may be formed from one or more bent sheets, extends over the entire peripheral surface of the screen cylinder 10, so that the free legs of the guide plate 11 form the Blasöffuung 25 at a distance from the screen cylinder 10 immediately in front of the blowing wall 8.

Between the free legs of the baffle 11, a flow divider 12 is arranged. The flow divider 12 is formed in this embodiment by two guide plates 13.1 and 13.2 arranged at an angle to each other. The guide plates 13.1 and 13.2 extend over the entire height of the screen cylinder 10 and thus over the entire height of the guide plate eleventh

As in Fig. 3 is shown, the blower opening 25 is subdivided by the flow divider 12 into a total of three partial openings. Between the free legs of the baffle 11 and the free longitudinal sides of the guide plates 13.1 and 13.2 each result Teilblasöffnungen through which the cooling air flow passes directly into the gap 20. Another Teilblasöffnung is formed through the central passage opening 26 in the flow divider 12. Thus, the cooling air flow entering the blow opening 25 is divided and guided into three partial air streams by the flow divider 12 arranged in the blow opening 25.

The screen cylinder 10, the baffle 11 and the flow divider 12 are mounted and held together on a support 15. The carrier 15 is for this purpose connected to the walls of the cooling shaft 6 via holding devices (not shown).

As in Fig. 1 is shown, the carrier 15 is held on the underside of the nozzle carrier 4. Between the nozzle carrier 4 and the carrier 15, a sealing device 14 is provided on the upper side of the screen cylinder 10, through which a substantially pressure-tight connection of the screen cylinder 10 to the spinneret 3 is possible. For this purpose, the screen cylinder 10 has a diameter which is preferably equal to or greater than the diameter of the spinneret 3.

In the lower region of the cooling shaft 6, a yarn outlet 17 is formed. The yarn outlet 17 is associated with a yarn guide 18, which preferably cooperates with a preparation device (not shown here). However, such devices can also be advantageously integrated into the cooling shaft 6. For this purpose, the blowing wall 8 could preferably be formed in the lower region of the cooling shaft 6 as a closed wall.

In the in the Fig. 1 to 3 illustrated embodiment of the device according to the invention, a polymer melt is fed through a spinning pump, not shown here, the spinneret 3. In the spinneret 3, the melt is filtered and extruded at the bottom through a plurality of nozzle bores to a plurality of filament strands 16. Thus, 200 to 250 filaments can be extruded simultaneously. The spin titer is preferably in the range from 0.2 dpf to 1 dpf. To cool the freshly extruded filament strands, a cooling air flow is blown into the cooling shaft 6 via the blowing wall 8 from the pressure chamber 7. In the upper region of the cooling shaft 6, a portion of the cooling air passes directly into the blow opening 25. By the arranged in the blow opening 25 flow divider 12, the incoming cooling air flow is divided into three individual partial air streams and partly directly on the jacket 19 of the Screen cylinder 10 and essentially led into the gap 20 between the jacket 19 and the guide plate 11. The jacket 19 of the screen cylinder 10 is preferably formed from a wire mesh, so that a uniform entry and penetration of the cooling air flow on the jacket 19 of the screen cylinder 10 can take place. The entering into the screen cylinder 10 cooling air penetrates the filament bundle and leads to a pre-cooling of the filament strands 16. In the further course the filament strands 16 pass through the trigger by means of a godet, not shown here in the free space of the cooling shaft 6. Here are the filament strands 16 directly through the from the blowing wall 8 transversely to the direction of yarn flow flowing cooling air stream further cooled.

When making a yarn with a total denier of 75 den. and 144 filaments could be produced at a production speed of 2,500 m / min. a very high thread uniformity can be achieved. Compared to known cross-flow blowing, an improvement in uniformity of over 30% was achieved.

The device according to the invention is thus particularly suitable for cooling a multiplicity of fine filament strands.

In Fig. 4 is a further embodiment of the device according to the invention shown in a longitudinal sectional view. For explanation, the components have the same function identical reference numerals.

The embodiment according to Fig. 4 has a spinning device 1 and a cooling device 2. The spinning device 1 is identical to the previous embodiment, so that reference is made to the preceding description.

The cooling device consists of a cooling shaft 6, in which a screen cylinder 10 is held directly on the underside of the nozzle carrier 4. The screen cylinder 10 has a gas-permeable jacket 19, preferably made of a wire mesh or a sieve. The screen cylinder 10 is associated with a guide plate 11 and a flow divider 12. The structure of the screen cylinder 10, the guide plate 11 and the flow divider 12 is identical to the previous embodiment, so that reference is made to the preceding description at this point.

The blow opening 25 formed by the guide plate 11 is connected directly to a pressure chamber 7 via a cooling air opening 23. The pressure chamber 7 is connected to a fan 9.

On the outlet side of the screen cylinder 10, a cooling pipe 21 is connected. The cooling tube 21 has a funnel-shaped inlet 22, which is connected directly to the screen cylinder 10 within the cooling shaft 6. The cooling tube 21 has a thread outlet 17, which is located outside of the cooling shaft 6. The Fadanauslaß 17 is associated with a yarn guide 18.

Between the nozzle carrier 4 of the spinning device 1 and the screen cylinder 10, a sealing device 14 is arranged, wherein the carrier 15 of the screen cylinder 10 is held directly on the nozzle carrier 4. By the sealing device 14 a resulting from the cooling shaft 6 outside air influence is avoided for cooling the filament strands.

At the in Fig. 4 illustrated embodiment of the device according to the invention is initially a cooling of the freshly extruded filament strands 16 in the screen cylinder 10. For this purpose, a transverse cooling air flow through the cooling air opening 23 is blown into the blow opening 25. In the blow opening 25 is carried by the flow divider 12, a division of the cooling air flow for equalization, so that over the entire jacket 19 of the screen cylinder 10, the cooling air enters. Thus, there is first a pre-cooling of the filament strands 16 in the screen cylinder 10. Subsequently, the filament strands 16 are common passed with the cooling air into the connected to the outlet side of the screen cylinder 10 cooling tube 21. In the cooling tube 21 we continue the cooling of the filament strands 16, wherein the cooling air flow is preferably accelerated in the upper region of the cooling tube 21. Such methods are characterized in particular by increased production capacities and production speeds in the production of synthetic fibers.

At the in Fig. 4 illustrated embodiment, it is also possible that in the inlet region of the cooling tube 21 is a further connection to the cooling shaft 6, so that a second cooling air flow could be introduced directly into the cooling tube 21.

In practice, such devices are commonly used for producing a plurality of threads. In Fig. 5 an embodiment of the device according to the invention is shown, through which a total of six threads can be spun and cooled simultaneously. The construction of a spinning station corresponds essentially to the exemplary embodiment Fig. 1 , so that reference is made to the description of a spinning station to the description of the Fig. 1 ,

In order to produce several threads, several spinnerets 3 are held in rows on a nozzle carrier 4. Each of the spinnerets 3 is connected via a melt line 5 with a spin pump 27, which is designed as a multiple pump.

The cooling device 2 is arranged directly below the spinning device 1 and consists of a cooling shaft 6, which extends parallelepiped below the nozzle carrier 4. The structure of the cooling shaft 6 substantially corresponds to the embodiment according to Fig. 1 , so that a transverse wall cooling air flow for cooling the filament strands 16 is generated by a blowing wall. In Fig. 5 the device is shown in a view parallel to the blowing wall. The plane of the drawing corresponds to the plane directly between the blowing wall and the blow opening with a view into the blowing openings.

In the upper region of the cooling shaft 6, a carrier 15 is held by means not shown here directly on the underside of the nozzle carrier 4. Each spinneret 3 is associated with a screen cylinder 10, wherein between the spinneret 3 and the screen cylinder 10 each have a sealing device 14 is held. Each of the screen cylinder 10 has a baffle 11 and a flow divider 12. The structure and arrangement of the baffles and flow divider is according to the in Fig. 1 shown embodiments. The carrier 15 is held on both end faces of the cooling shaft 6 in a guide 24 such that the carrier 15 can be lowered by the holding device in order to perform, for example, maintenance work on the spinneret 3 can. However, the guide 24 may also be designed such that the carrier 15 is held replaceable. For example, the carrier 15 could be plugged into the cooling shaft in the form of a cassette.

To cool the filament strands 16, these are each extruded in bundles through the spinnerets 3 and then guided into the respective associated screen cylinders 10. After precooling in the screening cylinders 10, the filament bundles are cooled together in the lower region of the cooling shaft 6 by a transverse cooling air flow. The selected number of spinning nozzles held in the spinning device 1 is exemplary. Thus, 6, 8, 10 or even more threads can be cooled simultaneously in a cooling shaft 6.

In Fig. 6 is a further embodiment of the device according to the invention for melt spinning and cooling of several filament bundles shown. The embodiment is essentially identical to the embodiment according to Fig. 5 , wherein the cooling device 2 has a position structure, as before to the embodiment according to Fig. 4 has been described.

In this case, each spinneret 3 is assigned a respective screen cylinder 10 with a cooling pipe 21 connected on the outlet side. The air supply takes place for all screen cylinder 10 together via a cooling shaft 6. The screening cylinders are each assigned a baffle 11 and a flow divider 12, as already described above. In this embodiment, the cooling tubes 21 are designed to be adjustable in height together with the carrier 15 in order to carry out maintenance work on the spinnerets 3 can. Regarding the function for cooling the filament strands is to the description of the Fig. 4 Referenced.

The in the Fig. 1 to 6 illustrated embodiments of the device are exemplary in construction and arrangement of the individual components. In principle, it is also possible to combine the guide plate and the flow divider in such a way that the free legs of the guide plate 11 are brought together at an angle in a central plane, wherein the blow opening could be formed by corresponding passage openings in the guide plate 11.

Likewise, the embodiment of the current divider shown is exemplary. Thus, the flow divider can also be advantageously formed from a guide plate, which can be improved by certain shapes. The passage opening in the flow divider could also be designed by a perforated plate structure, so that there are several openings.

The device according to the invention is particularly suitable for cooling microfilaments with a high number of filaments. Thus, comparative experiments with conventional cross-flow blown have shown significant improvements in the uniformity of the filament strands produced. The device according to the invention can be used independently of the respective type of polymer or independently of the subsequent further processing for producing the threads for each type of fiber production.

LIST OF REFERENCE NUMBERS

1

spinner

2

cooling device

3

spinneret

4

nozzle carrier

5

melt line

6

cooling shaft

7

pressure chamber

8th

blowing wall

9

fan

10

screen cylinder

11

baffle

12

current divider

13.1, 13.2

guide plate

14

seal means

15

carrier

16

filament

17

thread outlet

18

thread guides

19

coat

20

gap

21

cooling pipe

22

inlet

23

Cooling air opening

24

guide

25

blowing opening

26

Port

27

spinning pump

Claims (14)

1. Apparatus for the melt spinning and cooling of a multiplicity of synthetic filaments (16), with a spinning device (1) which has at least one spinneret (3) for extruding the filaments, and with a cooling device (2) which has in a cooling well (6) a perforated cylinder (10) arranged below the spinneret (3) and having a gas-permeable jacket (19), and has a cooling-stream generator (7, 9) for generating a cooling-air stream flowing transversely with respect to the running direction of the filaments, a U-shaped guide plate (11) being assigned to the perforated cylinder (10) with a clearance, and the guide plate (11) partially surrounding the jacket (19) of the perforated cylinder (10) and forming on one side a blow orifice (25) connected with the cooling-stream generator, characterized in that the blow orifice (25) is assigned at least one stream divider (12) by which the cooling-air stream entering the blow orifice (25) is divided before it impinges onto the perforated cylinder (10).
2. Apparatus according to Claim 1, characterized in that the stream divider (12) is formed by one or more lead plates (13.1, 13.2) which are held in the middle of the blow orifice (25) and which extend essentially over the height of the perforated cylinder (10).
3. Apparatus according to Claim 1 or 2, characterized in that the stream divider (12) has centrally at least one passage orifice (26) through which part of the cooling air is conducted directly onto the perforated cylinder (10).
4. Apparatus according to one of Claims 1 to 3, characterized in that the perforated cylinder (10) is connected on the outlet side to the cooling well (6), which cooling well (6) has a thread outlet (17) located below with a clearance in relation to the perforated cylinder (10).
5. Apparatus according to one of Claims 1 to 3, characterized in that the perforated cylinder (10) is connected on the outlet side to a cooling tube (21) which has a funnel-shaped inlet (22) for narrowing the free flow cross section.
6. Apparatus according to one of Claims 1 to 5, characterized in that the cooling-stream generator is formed by a pressure chamber (7) connected to the blow orifice (25) and a blower (9) connected to the pressure chamber (7).
7. Apparatus according to Claim 6, characterized in that a blow wall (8) is formed between the pressure chamber (7) and the blow orifice (15), the blow wall (8) extending on one side along the cooling well (6).
8. Apparatus according to one of Claims 1 to 7, characterized in that the perforated cylinder (10) has on the inlet side a sealing device (14), by means of which the perforated cylinder (10) is connected sealingly to a nozzle carrier (4) of the spinneret (3).
9. Apparatus according to one of the abovementioned claims, characterized in that the jacket (19) of the perforated cylinder (10) is formed from a wire fabric.
10. Apparatus according to one of the abovementioned claims, characterized in that the spinning device (1) has a plurality of spinnerets (3) on a common nozzle carrier (4), in that one of a plurality of perforated cylinders (10) is assigned to each spinneret (3) within the cooling well (6), and in that the perforated cylinders (10), the guide plates (11) assigned to the perforated cylinders (10) and stream dividers (12) are held jointly in the cooling well (6) by a bearer (15).
11. Apparatus according to Claim 10, characterized in that the bearer (15) is connected vertically adjustably and/or exchangeably to the cooling well (6).
12. Apparatus according to Claim 10 or 11, characterized in that the bearer (15) can be equipped selectively with additional cooling tubes (21) which are connected in each case to the outlet sides of the perforated cylinders (10).
13. Apparatus according to one of Claims 10 to 12, characterized in that the cooling well (6) has, on the side facing the blow orifices (25) of the guide plates (11), an exchangeable blow wall (8) which is connected to the pressure chamber (7).
14. Apparatus according to Claim 13, characterized in that the blow wall (8) can be exchanged for a cartridge wall, which cartridge wall has in the region of the blow orifices (25) a cooling-air orifice (23) which is connected to the pressure chamber (8).

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