EP0742851B1 - Spinning beam for spinning a plurality of synthetic threads and spinning device comprising a spinning beam of this type - Google Patents

Description

The invention relates to a spinning beam for spinning a Multiple synthetic threads and a spinning system with one such a spinning beam.

A spinning beam for spinning a plurality of synthetic threads, in which the spinneret plates are arranged in a row, is known from EP-163 248 B (Bag. 1416). A spinning system with such a spinning beam is known, for example, from DE-PS 24 38 364 (Bag. 905) and DE-OS 41 03 990 (Bag. 1811) or the unpublished DE 195 13 941 A1.
The arrangement of the spinneret plates in a row results in a large longitudinal extension of the spinning system.

A spinning beam according to the preamble of claim 1 and a spinning system with such a spinning beam according to claim 2 are known from EP 0 285 736 B1.
This makes it possible to spin an even larger number of threads in a system that is as compact as possible, and in particular to avoid non-uniform heat losses which can lead to non-uniformity of the threads.

Depending on various process parameters for melt spinning can despite a very compactly designed spinning beam nevertheless, no uniform quality of the threads from row to row be achieved. These differences can occur during production of staple fibers by later mixing the ones to be spun Staple fibers are balanced, but they make themselves Winding the threads into spinning bobbins and their further processing noticeable.

From DE-A-2 248 757 a device for melt spinning is known, in which for a series of spinnerets a central dosing pump and a downstream central one Filters are provided. This can also ensure a uniform consistency of the melt can be achieved, but with the disadvantage that due to different flow resistances in the distribution system the spinnerets spin uneven throughputs what leads to different thread qualities. This disadvantage cannot be avoided by upstream Compensate throttle devices completely, since the slightest pressure difference lead to an uneven distribution of quantities.

It is therefore an object of the invention to make such quality differences at least to compensate. The solution for the spinning beam results from claim 1. The solution for a spinning system according to claim 2 results from the characteristic of Claim 2.

The spinning beam according to claim 1 has the advantage that all spinnerets housed in a single heating box are, the length of the heating box is limited such that there are no temperature differences along its length can and that each row of spinnerets each have a multiple spinning pump assigned. This results in particular also the advantage of greater flexibility, as in the event of a malfunction on one of the pumps not the entire spinning system except Must be put into operation.

The spinning system according to claim 2 has the advantage that you blow box can be interpreted so narrow that it is between two There is space for a row of nozzles in a close arrangement. The Blow boxes are independent of each other and by two separate ones Blowers are supplied with blown air (claim 3). To everyone Filaments emerging from the spinnerets of the rows of nozzles evenly to cool the vertical cross section of the Blow boxes in the direction of flow, so that the exit speed the blowing air through the blowing walls towards the Filament bundles essentially for all spinnerets of the Spinneret row is the same (claim 5). Is particularly cheap even with an arrangement of two parallel rows of nozzles, if below these rows of nozzles and between them two of the same type Blow boxes are provided back to back by a common partition are separated from each other (claim 6).

In a spinning system with two parallel rows of nozzles, it is from particularly advantageous if the below and between the rows of nozzles arranged blow boxes designed according to claim 7 are, because this version is particularly space-saving and through they have a good heat balance and a good heat equalization the blowing air flowing out of the blowing walls over the entire Length and width of the spinning system is guaranteed. It is noted that these blow boxes are in the direction of flow narrow substantially wedge-shaped so that essentially the same amount of blown air flows out and uneven degradation the air pressure in the flow direction is avoided. The wedge-shaped In particular, training can only involve one Extend part of the blow box. Such a narrowing the blow box in the direction of the nozzle rows can be advantageous Way with a wedge-shaped in horizontal cross section Cross section of the air distribution chamber - starting from the Air supply duct up and / or down - be connected, wherein the latter is known per se, for example, from US Pat. No. 3,999,910 is.

The execution of the spinning system according to the invention has opposite the prior art in particular the advantage that both sides of the spinning beam or the spinning system independently of one another can be operated, e.g. with different throughputs and even operated or shutdown independently can be, if special operational requirements require this or make it appear expedient.

Exemplary embodiments of the invention are described below:

Fig. 1

einen Querschnitt durch eine Spinnanlage;

Fig. 2

einen Längsschnitt durch eine Spinnanlage;

Fig. 3

die Untersicht unter eine Spinnanlage;

Show in the drawing

Fig. 1

a cross section through a spinning system;

Fig. 2

a longitudinal section through a spinning system;

Fig. 3

the bottom view under a spinning system;

The spinning beam is formed by the two side plates 2 and 3 and the top plate 4 and the bottom parts 8. The side plates 2 and 3 are U-shaped in profile. there the horizontal U-webs 5 and 6 form part of the top or underside of the spinning beam 1. The top plate 4 also has a U-shaped cross-sectional profile. It extends over the entire length of the spinning beam 1. It points over its length at least two holes in their base plate, which for For mounting and welding one pump connection plate each 11 serve. This will be discussed later. The The top plate 4 is with its side webs 7 with the side webs 5th the side plates 2 and 3 welded. Here, the U-shaped Opening the profile upwards. On the one facing up Base of the profile is a multiple pump 12 on each of the Pump connection plates 11 attached pressure-tight. Any multiple pump 12 is driven by a pump shaft (drive shaft) 13. The multiple pump 12 is a gear pump, in which a melt flow is fed through melt line 23 and distributed over several pump chambers and then on a plurality of distribution lines 14 is distributed. The melting line 23 is heated by a heating jacket 15. It connects the Melt source (e.g. extruder not shown) with the Spinning beam 1.

A melt feed line 23 leads into the spinning beam 1 Melt feed line 23 penetrates the base side of the top plate 4 and is then connected to a distributor piece 25. Of the Distributor 25 from distributes the melt to the melt distribution lines 26, each of which is a pump connection plate 11 one of the pumps 12 leads. By doing Example with a total of twelve spinnerets 18 are two pump connection plates 11 and two multiple pumps 12 are provided. The Pump connection plates 11 are each centered over six nozzles 18. Through the melt distribution line 26 is the multiple pumps 12 of the melt stream supplied, which then through the pumps 12 is distributed to 6 distribution lines 14 each. Each a manifold 14 leads to a spinneret 18 by opens into the nozzle pot 17 via the channel 28.

It should be emphasized that the nozzle pots 17 are identical are. Rectangular nozzle pots are possible in horizontal section.

In the exemplary embodiment, two sub-plates 8 have a cross-sectional profile U-shaped. The U-webs 16 of the lower plate point downwards and are at the bottom with the Side webs 6 of the side plates 2, 3 welded. The distance between the lower plates 8 is closed by a plate 10. The base of each sub-plate 8 has several holes on, which are arranged at equal intervals, for. B. six Holes. Terminal plates 9 are inserted into these holes and welded to the lower plate 8. Each of the connection plates 9 protrudes with a connector 20 in the U-shaped mouth Lower plate 8. The connector 20 has on its circumference Thread 19 on. With this thread, the nozzle pot 17, the has a corresponding counter thread on its inner circumference, screwed. In the bottom of the nozzle pot 17 is a spinneret 18 inserted. A piston 21 is movable in the nozzle cup 17. This piston 21 is through a round seal 22 which the supply line 28 surrounds, opposite the lower connector 20 of the Connection plate 9 sealed. On its the nozzle plate 18th the side facing the piston 21 is covered by a membrane 24 sealed. The melt line 28 penetrates the piston 21 and the membrane 24 in the middle. In the depressurized state the membrane 24 on the piston 21 with a slight biasing force and presses it against the lower end face by means of the sealing ring 22 of the connector 20 of the connecting plate 9. By the Pressure of the melt penetrating into the nozzle pot 17 subsides the membrane 24 against the piston 21 and the gap that this Piston surrounds and thereby seals the piston 21. simultaneously the piston and the sealing ring 22 with the required Sealing force on the connecting piece 20 of the connecting piece 9 pressed. The nozzle package present in the nozzle pot 17 is therefore preferably self-sealing.

As shown in FIG. 1 and the bottom view according to FIG. 3, the Spinning beam 1 thus two rows of nozzles 181, 182, consisting of six nozzles each 18. The rows of nozzles are small Spaced from each other. Each row of nozzles is 181, 182 each assigned to a pump 12. The pump 12 is located approximately in the middle over each row (see Fig. 2). The two pumps will in particular from a common melt supply line 23 fed. In the pumps 12, the melt flow is in each case six distribution lines 14 distributed. The distribution lines have the same length and therefore need to be more or less great detour. The distance between the two Row of nozzles is selected so that the distributor lines 14 do not hinder each other.

The melt feed line 23 is by a not shown Loaded extruder.

The spinning beam 1 itself is with a heating medium, for. B. diphyl vapor, fed.

A total of twelve threads can be spun with the spinning beam 1 which consist of a large number of filaments.

To cool the filaments is below the spinning beam 1, and in the distance between the two rows of nozzles 181, 182, a cooling device 29 is arranged. The cooling device is a flat, vertical cuboid, which runs along the rows of nozzles extends. The cooling device is vertical standing divider 30 divided diagonally. This creates it two blow boxes 31 and 32. The front wall 33 of each blow box 31, 32, which each one of the nozzle rows 181, 182 and the emerging from the filaments is permeable to air and designed and designated as a blowing wall 33. Before the two narrow ends of the blow box 31, 32 sit Air chambers 34 and 35, which have an air slot 36 on the end faces are each connected to the blow box 31 or 32. The Louvre 36 extends essentially over the entire Blow box height. Each of the air chambers 34, 35 is connected to one Air connection 37 connected from below into the air chamber 34, 35 opens. The air chamber extends essentially over the total height of the blow box, so that its cross section decreases steadily, as shown in Figure 2. It can do that be accomplished that each of the blow box 31, 32 facing away from side wall 38 is arranged obliquely so that the air chamber 34, 35 is essentially conical upwards approaches (Fig. 2). But it can also - what is not shown here the side walls 39 (FIG. 3) be inclined so that the air chamber 34, 35 over their Tapered length from bottom to top. This is in Figure 1 indicated by thin lines.

In the exemplary embodiment shown, the blow walls 33 an exhaust wall 40 opposite. This is also about a porous wall. The outlet wall 40 has the same dimensions as the blowing wall 33 and with this through side walls 41 to one so-called "cooling shaft" 42 connected.

So-called "chutes" 43 are connected to the cooling shaft on. The chutes 43 are designed as tubes. Every thread A tube is assigned to the one in front of the corresponding one Outlet opening 44 is set for the respective thread.

The air lines 37 are used to cool the filaments or threads fed with blown air by means of a blower (not shown). The air enters the air chambers 34, 35 and through the Louvre 36 in the two blowing chambers 31 and 32 through the diagonal plate 30 are separated. Through the conical training the air chambers 34 and 35 ensure that the air has even pressure distribution within the air chambers, so that over the entire height of the louver 36 a uniform Airflow is guaranteed. Due to the diagonal separation of the Blow chambers 31 and 32, respectively, from their respective air inlet 36th taper from, it is achieved that the same here Pressure conditions arise and thus one over the entire Width of the blow box ensures uniform air flow is.

It should be noted that the two air lines 37 also can be supplied with blown air by separate blowers, which independent of each other in terms of throughput and pressure level can be adjusted.

It should also be mentioned that the emerging threads subsequently Coils are wound up. The bobbins can be on the bobbin one or two winding machines. Since the Threads spun with a single spinning beam and with uniform Cooling conditions have cooled, it is ensured that even this large number of threads are completely identical to one another Has properties.

REFERENCE NUMBERS

1

spinning beam

2

side plate

3

side plate

4

top plate

5

U-web

6

U-web

7

U-web

8th

lower plate

9

connecting plate

10

plate

11

Pump adapter plate

12

Multiple pump

13

drive shaft

14

Melt feed line, distribution line

15

jacketed

16

U-webs

17

pegs Cup

18

Nozzle, spinneret

19

thread

20

Connector, connection

21

piston

22

seal

23

Melt line, melt line

24

membrane

25

Melt distributor, distributor

26

Melt distribution line

27

connecting plate

28

channel

29

cooling device

30

Sheet metal, partition

31

blow box

32

blow box

33

blowing wall

34

air chamber

35

air chamber

36

Louvre

37

air line

38

Side wall

39

Side wall

40

Ausblaswand

41

Side wall

42

cooling shaft

43

chute

44

outlet

181

Spinnerets series

182

Spinnerets series

Claims (6)

1. Spinning beam for spinning a plurality of synthetic threads which has the shape of an elongate cuboid and is heatable; with a plurality of connections (20) attached to the underside of the spinning beam (1) for a respective spinneret pot (17) with a spinneret plate (18), the connections (20) being arranged in two parallel rows (181, 182) in the longitudinal direction of the spinning beam (1); and with at least one pump (12) which is attached to a melt line (23) and which is connected to the connections (20), characterised in that a multiple spinning pump (12) with an attached plurality of distributor lines (14) is associated with each row (181, 182) of connections (20), which multiple spinning pump (12) distributes a melt flow to a plurality of pump chambers and feeds it into the distributor lines (14) which lead to the connections (20) associated with this row.
2. Spinning system for spinning a plurality of synthetic threads with a spinning beam (1) according to claim 1, which has the form of an elongate cuboid and is heatable; with a plurality of connections (20) attached to the underside of the spinning beam (1) for a respective spinneret pot (17) with a spinneret plate (18), the connections (20) being arranged in two parallel rows (181, 182) in the longitudinal direction of the spinning beam (1), and with a cuboid cooling device (29) underneath and between the two rows (181, 182) of spinneret plates (18), which cooling device (29) has a respective blast wall (33) which faces one of these rows, characterised in that the cuboid cooling device (29) is divided into two congruent blast boxes (31, 32) and that one of the blast boxes (31, 32) with one of the blast walls (33) is associated with each row (181, 182) of spinneret plates (18).
3. Spinning system according to claim 2, characterised in that each blast box (31, 32) is attached to an individual air supply duct (37), and in that each of the air supply ducts (37) can be controlled independently of the other with respect to pressure level and/or air throughput by a respective adjustable throttle or a respective adjustable fan.
4. Spinning system according to claim 3, characterised in that each blast box (31, 32) on one of its end walls (air inlet side) has an air inlet (36) which extends substantially over the entire height of the blast box, and in that an air distributor chamber (34) is located upstream of the respective end wall of the blast box (31) with the air inlet (36), which air distributor chamber (34) has the air supply duct (37).
5. Spinning system according to any one of claims 2 to 4, characterised in that the two blast boxes (31, 32) are designed in such a way that their vertical cross-sections taper continuously, at least over a partial length in the flow direction, from the air inlet (36) to their opposing end.
6. Spinning system according to claim 2, characterised in that the two blast boxes (31, 32) have a common partition wall.

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