EP3047056B1 - Apparatus for producing multicoloured crimped composite yarns - Google Patents

Description

The invention relates to a device for producing multicolored crimped composite threads according to the preamble of claim 1.

A generic device for producing multicolored crimped composite threads is for example from the EP 1 035 238 A1 known.

In the known device for producing a multi-colored crimped composite yarn initially several colored polymer melts are generated in parallel side by side and extruded through a plurality of separate spinnerets to each a monochrome filament bundle. The filament bundles consist of a plurality of individual filament strands, which are extruded through the nozzle openings of the spinneret into endless strands. After several treatment steps by cooling and stretching the colored filament bundles are combined to form a composite thread. The composite yarn is given a mixed color which results from the combination of the colored filaments of the individual filament bundles. It is customary to supply the colored filament bundles together to a texturing nozzle in order to form a common yarn plug from the filament bundles. However, the combination of the colored filaments after texturing is preferably carried out by means of a swirling nozzle.

In the known device, the spinnerets for the production of a composite thread are spaced apart at the bottom of a heated spinneret. Depending on the number of colors, two, three or even four spinnerets can be used side by side to produce a composite thread. After extrusion, the filament bundles become dependent a spinning division cooled side by side and deducted for further treatment.

In practice, however, such composite threads are usually produced simultaneously in groups of several composite threads parallel to each other. Depending on the number of colors, which determines the number of filament bundles per composite thread, thus resulting in correspondingly long spin bars with juxtaposed spinnerets, the supply of the spinnerets must be made via correspondingly long melt lines between the melt producers and spinnerets. Thus, a relatively high expenditure on equipment is required to ensure uniform heating and melt flow. In addition, the threads are usually performed in the treatment device with short distances parallel to each other. For this purpose, it is necessary that the filament bundles after cooling must be relatively strongly deflected in order to be treated together in the treatment facility. Such deflections, in particular of the filament bundles produced in the outer region of the spinning beam, inevitably cause different thread guides, which can have a negative effect on the physical formation of the filament strands.

It is therefore an object of the invention to provide an apparatus for producing multi-colored crimped composite yarns of the generic type, with which a group of composite yarns with high uniformity and low energy input can be produced.

This object is achieved in that each of the spinnerets has a round nozzle package with a plurality of segmentally arranged on a bottom groups of nozzle bores, which via separate melt channels and a plurality of melt inlets formed on an upper surface of the round nozzle pack are connected to the melt generators.

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

The invention was not by the known device from the DE 10 2009 038 496 A1 obvious. The known device is based on the fact that the composite surfaces are produced from two filament bundles, which are previously extruded separately from one another by separate spinneret packs. Only one of the filament bundles of a polymer type is provided with a round nozzle package with a plurality of groups of nozzle bores. In that regard, the known device can not detect whether the extrusion of different types of polymers, as is common in Multicolorfäden, even with a single round nozzle package is possible. On the contrary, the different treatment of the filament bundles, as in the DE 10 2009 038 496 A1 discloses potential problems and a reservation to extrude the different types of polymer with a spinneret pack.

The invention is characterized in that in particular so-called tricolor or multicolour composite threads, which are formed from three or four differently colored filament bundles, are extrudable in a spatial arrangement. This allows the filament bundles of a composite thread to lead to cooling in a confined space. For this purpose, the spinnerets have a round nozzle package, on the undersides of which several, preferably three groups of nozzle bores are segmentally segmented relative to one another. Each group of nozzle bores is associated with separate melt channels which connect the nozzle bores to the associated melt producers via separate melt inlets at the top of the round nozzle package. So can be beneficial by three or four groups Three or four different colored filament bundles are extruded simultaneously from nozzle bores on a round nozzle package.

It is of great importance that within the spinnerets the different colored polymer melts are separately feasible. In order to ensure uniform extrusion of the polymer melts through the nozzle bores, provision is further made for the round nozzle packs to contain one of a plurality of separate filter elements for each group of nozzle bores.

For the extrusion of the filament strands at a plurality of spinnerets, which are held within a spinning beam, the development of the invention is particularly advantageous, in which the spinnerets are formed identically within a spinning beam, wherein between the melt generators and the melt inlets of the round nozzle packages a distributor device is arranged. Such distribution devices have at least a plurality of spin pumps designed as multiple pumps, which distributes the polymer melt of one of the melt generators uniformly to a plurality of spinnerets. Thus, the polymer melts of the melt generators can be uniformly distributed to a plurality of round nozzle packages of the spinnerets with high uniformity.

In order to obtain a uniform intensive cooling of the filament strands in a spatial arrangement of the extruded filament groups, the development of the invention is particularly advantageous in which the cooling device per spinneret has a coaxial with the spinneret, gas-permeable cooling cylinder which is disposed within a blow box. In that regard, the extruded filament bundles can be uniformly acted upon by a cooling air flow. The cooling air flow penetrates the cooling cylinder jacket from outside to inside, so that the cooling air flowing in the interior of the cooling cylinder is led together with the filament bundles to a yarn outlet.

The uniformity of the cooling air generation at the periphery of the cooling cylinder can be advantageously improved by the blow box is formed of an upper pressure chamber and a lower distribution chamber, and wherein the lower distribution chamber is connected to a cooling air source. The cooling air is distributed evenly between the distribution chamber and the pressure chamber via a perforated plate.

To ensure that the cooling air inlet takes place in the upper section of the cooling cylinder within the pressure chamber, it is furthermore provided that the cooling cylinders in the region of the distribution chamber have a gas-impermeable longitudinal section, which each form a thread outlet opening on a lower side of the blow box. Thus, a directed in the direction of yarn flow cooling air flow, which supports the outlet and the removal of the filament bundles from the blow box.

In order that the produced composite threads can be used directly as carpet yarns, the treatment device has a plurality of godets for pulling and stretching the filament bundles.

In addition, the filament bundles are preferably crimped by means of a so-called Stauchkrangelung. For this purpose, the treatment device preferably has a plurality of texturing nozzles for crimping the filament bundles, wherein the texturing nozzles are assigned at least one cooling drum for cooling the crimped filament bundles.

The number of texturing nozzles provided within the treatment device is dependent on the particular process for forming the composite threads. For example, the different colored filament bundles together one Texturing be supplied so that after crimping the filament bundles are dissolved into a crimped composite thread. However, there is also the possibility that the differently colored filament bundles per composite thread are crimped separately and are brought together in a post-treatment step by a swirling nozzle.

The device according to the invention is in principle suitable for producing multicolored, crimped composite threads of a polymer material, for example a polyester, polypropylene or polyamide, or combinations of such materials. The composite threads produced with the device are directly suitable as so-called BCF yarns for the production of carpets.

The device according to the invention will be described in more detail below with reference to an embodiment with reference to the accompanying figures.

Fig. 1

schematisch eine Ansicht eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 2

schematisch mehrere Ansichten eines Ausführungsbeispiels einer Spinndüse des Ausführungsbeispiels aus Fig. 1

Fig. 3

schematisch eine Ansicht eines Ausführungsbeispiels einer Behandlungseinrichtung

They show:

Fig. 1

schematically a view of an embodiment of the device according to the invention

Fig. 2

schematically a plurality of views of an embodiment of a spinneret of the embodiment of Fig. 1

Fig. 3

schematically a view of an embodiment of a treatment device

In Fig. 1 an embodiment of the inventive device for producing a plurality of multi-colored, crimped composite threads is shown. The embodiment of the device according to the invention is formed from a melt spinning device 1, a cooling device 2, a treatment device 3 and a winding device 4. The melt spinning device 1, the Cooling device 2, the treatment device 3 and the winding device 4 are usually held in a vertical arrangement.

The melt spinning device 1 has a plurality of melt generators 5.1, 5.2 and 5.3, which are formed by extruders in this embodiment. In principle, the melt producers 5.1, 5.2 and 5.3 could also be formed, for example, by so-called discharge pumps. The melt generators 5.1, 5.2 and 5.3 are connected via melt lines 8.1, 8.2 and 8.3 and a distributor device 47 with a plurality of spinnerets 10.1, 10.2 and 10.3. The spinnerets 10.1, 10.2 and 10.3 are identical and each have three separate melt inlets.

To explain the spinnerets 10.1, 10.2 and 10.3 is in addition to the Fig. 2 Referenced. The Fig. 2 shows several views of one of the spinnerets 10.1, 10.2 or 10.3. So is in Fig. 2.1 a cross-sectional view of the spinneret 10.1 shown. Fig. 2 shows a plan view of an inlet side of the spinneret 10.1 and in Fig. 2.3 is a plan view of the outlet side of the spinneret 10.1 shown.

In the Fig. 2 illustrated spinneret 10.1 is formed by a round nozzle package 11. The round nozzle package 11 consists of an inlet plate 12, a distributor plate 13 and a nozzle plate 14, which are held sealingly once. The nozzle plate 14 includes a plurality of groups of nozzle bores 16.1, 16.2 and 16.3, which are formed segmentally distributed on the nozzle plate 14. Each group of nozzle bores 16.1, 16.2 and 16.3 thus includes a plurality of nozzle bores for extruding a plurality of filament strands respectively.

As from the illustration in Fig. 2.1 shows, the nozzle bores 16.1, 16.2 and 16.3 each open into a collection chamber 50.1, 50.2 and 50.3, the segment-shaped are formed between the nozzle plate 14 and the distributor plate 13.

The distributor plate 13 has in each case a plurality of groups of melt channels 17.1, 17.2 and 17.3 which open at an upper side of the distributor plate 13 into a plurality of filter chambers 19.1, 19.2 and 19.3 and which at an underside of the distributor plate 13 with one of the collecting chambers 50.1, 50.2 and 50.3 are connected.

In the filter chambers 19.1, 19.2 and 19.3 at the top of the distributor plate 13 a plurality of filter elements 18.1, 18.2 and 18.3 are arranged. Each group of nozzle bores 16.1, 16.2 and 16.3 is associated with a filter element 18.1, 18.2 and 18.3. The filter chambers 19.1, 19.2 and 19.3 are assigned a plurality of inlet chambers 20.1, 20.2 and 20.3.

The inlet chamber 20.1, 20.2 and 20.3 are formed in the inlet plate 12, which has on its upper side in each case a plurality of melt inlets 15.1, 15.2 and 15.3, which open directly into the associated inlet chambers 20.1, 20.2 and 20.3.

The round nozzle package 11 of the spinneret 10.1 is suitable for extruding three differently colored filament bundles simultaneously, wherein the colored melts are guided separately from one another.

In the Fig. 1 shown spinnerets 10.1, 10.2 and 10.3 are arranged on the underside of a heated spinneret 9 and formed identical. In that regard, the description applies to the Fig. 2 also to the spinnerets 10.2 and 10.3.

At the in Fig. 1 In the embodiment shown, the distributor device 47 has a plurality of spinning pumps 6.1, 6.2 and 6.3, which are connected via a pipe system 46 to the spinnerets 10.1, 10.2 and 10.3. The spinning pumps 6.1, 6.2 and 6.3 are assigned to the melt producers 5.1, 5.2 and 5.3. Thus, the melt generator is 5.1 directly connected via the melt line 8.1 with the spinning pump 6.1. The melt generator 5.2 is accordingly coupled via the melt line 8.2 with the spinning pump 6.2 and the melt generator 5.3 via the melt line 8.3 with the spinning pump 6.3. The spinning pumps 6.1, 6.2 and 6.3 are designed as a triple pump and thus have three melt outputs. The melt outputs of the spinning pumps 6.1 and 6.2 and 6.3 are connected via the manifold pipe system 46 with the melt inlets 15.1, 15.2 and 15.3 of the spinnerets 10.1, 10.2 and 10.3. In that regard, for example, generates the spin pump 6.1 from the polymer melt produced by the melt generator 5.1 three evenly divided partial melt streams, which are supplied under pressure to the spinnerets 10.1, 10.2 and 10.3. The function of the spinning pumps 6.2 and 6.3 is corresponding, so that at each spinneret 10.1, 10.2 and 10.3 three different colored partial melt streams are fed and extruded through the spinnerets 10.1, 10.2 and 10.3 to three different colored filament bundles 30.1, 30.2 and 30.3. The filament bundles 30.1, 30.2 and 30.3 enter the underside of the spinnerets 10.1, 10.2 and 10.3 directly into the cooling device 2, wherein the filament bundles 30.1, 30.2 and 30.3 in a spatial arrangement corresponding to the segmental distribution of the nozzle bores of the spinnerets 10.1, 10.2 and 10.3 be guided.

The cooling device 2 consists of a blow box 21, which is held directly below the spinning beam 9 and coaxial with the spinnerets 10.1, 10.2 and 10.3 each having a cooling cylinder 22.1, 22.2 and 22.3. The cooling cylinders 22.1, 22.2 and 22.3 penetrate the blow box 21 completely to a bottom and each form a Fadenauslassöffnung.

Within the blow box 21, an upper pressure chamber 23 and a lower distribution chamber 24 are formed, which are interconnected via a perforated plate 26. Within the distribution chamber 24, the cooling cylinders 22.1, 22.2 and 22.3 each have a gas-impermeable longitudinal section 27. The walls of the cooling cylinders 22.1, 22.2 and 22.3 are gas-permeable in the region of the pressure chamber 23.

The distribution chamber 24 is connected via a cooling air connection 25 with a cooling air source, not shown here.

For cooling the filament bundles guided in the interior of the cooling cylinders 22.1, 22.2 and 22.3, a cooling air flow is supplied via the distribution chamber 24 to the pressure chamber 23. Within the pressure chamber 23, the cooling air penetrates the walls of the cooling cylinders 22.1, 22.2 and 22.3 and strikes the freshly extruded filament bundles. In that regard, the filament bundles are uniformly applied over the lateral surface of the cooling cylinder with a cooling air flow.

After the filaments have cooled, the filament bundles 30.1, 30.2 and 30.3 assigned to one of the spinnerets 10.1, 10.2 or 10.3 are brought together in each case by a collection thread guide 48.1, 48.2 and 48.3. Subsequently, all filament bundles are removed by means of the treatment device 3 from the spinnerets 10.1, 10.2 and 10.3. The treatment device 3 is shown here only symbolically, since the process units can be formed within the treatment device 3 as a function of the respective manufacture thread type and individually assembled. Thus, for example, a stretching can be carried out simultaneously both on the individual filament bundles and on a plurality of filament bundles. The treatment device 3 could thus include preparation devices, drawing devices, crimping devices, turbulizers and / or relaxation devices. However, an essential component for producing a composite thread is a composite agent which brings together the filament bundles 30.1, 30.2 and 30.3 of one of the composite threads 31.1, 31.2 or 31.3 within the treatment device 3 and produces a composite thread with a mixed color from the differently colored filament strands of the filament bundles. The compound used in Fig. 1 symbolically represented and designated by the reference numerals 29.1, 29.2 and 29.3, depending on the method may be formed both by a crimping device or a swirling device. It is essential here that a plurality of composite threads 31.1, 31.2 and 31.3 are fed to a take-up device 4 on the outlet side of the treatment device 3.

In Fig. 3 is an embodiment of a possible treatment device 3, as in the embodiment according to Fig. 1 could be used, shown schematically. The exemplary embodiment of the treatment device 3 has, per composite thread 31.1, 31.2 and 31.3, respectively a preparation device 38, a thread collection device 39, a withdrawal godet unit 40, a godet unit 41, a texturing nozzle 42, a cooling drum 43, two guide godets 44.1 and 44.2 and one between the guide godets 44.1 and 44.2 arranged Verwirbelungsvorrichtung 45. The per aggregate thread provided process units are identical executed within the treatment device 3 to the adjacent process units of the adjacent processing stations. The texturing nozzles 42 or alternatively the swirling devices 45 can each be used as composite means to merge the filament bundles 30.1, 30.2 and 30.3 in each case into one of the composite threads 31.1, 31.2 and 31.3. In this embodiment, the filament bundles 30.1, 30.2 and 30.3 of one of the spinnerets 10.1, 10.2 or 10.3 are withdrawn by the withdrawal godet unit 40. The withdrawal godet unit 40 is formed by a plurality of godets 49, which are looped around several times by the filament bundles. The subordinate Draw godet unit 41 also has a plurality of godets 49 which are driven at a higher peripheral speed for stretching the filament bundles. The godets 49 of the withdrawal godet unit 40 and the draw godet unit 41 are preferably designed to be heated.

For crimping the filament bundles (30.1, 30.2 and 30.3) are dammed together within the texturing 42 together or separately to a yarn plug 50. The texturing nozzle 42 has for this purpose a delivery nozzle and a stuffer box, which are not explained in detail at this point. The yarn plug 50 produced by the texturing nozzle 42 is cooled at the circumference of a cooling drum 43 and then dissolved via the guide godet 44.1 into a crimped composite thread or a crimped part thread. Between the guide godets 44.1 and 44.2 there is a turbulence of the already bundled filament bundle or alternatively the individually fed filament bundle. Regardless of the choice of merging the filament bundles to produce the composite thread, the respective composite thread 31.1, 31.2 or 31.3 is fed to the subsequent take-up device 4 via the guide godet 44.2.

As from the representation of Fig. 1 shows, the winding device 4 in this embodiment, a total of three winding points 32.1, 32.2 and 32.3 to wrap the composite yarns 31.1, 31.2 and 31.3 to a respective coil 37.1, 37.2 and 37.3. The coils 37.1 to 37.3 are wound together on a winding spindle 33.1. The winding spindle 33.1 is held on a rotatable winding turret 34, which carries a second winding spindle 33.2 in order to be able to wind the composite yarns continuously. The winding spindles 33.1 and 33.2 are each assigned a traversing device 36 and a parallel to the winding spindles 33.1 and 33.2 held pressure roller 35 in the winding points 32.1 to 32.3. such Winding devices are well known, so that no further explanation takes place at this point.

This in Fig. 1 illustrated embodiment of the device according to the invention is used to produce the so-called tricolor threads, which are each produced from three different colored filament bundles. In the illustrated embodiment, however, the number of simultaneously produced composite threads is exemplary. In principle, more than three or less than three threads can be generated in parallel next to each other. In addition, the number of filament bundles per composite yarn is also exemplary only. Thus, it is also advantageous to produce four-color composite threads with the illustrated device.

LIST OF REFERENCE NUMBERS

1

Melt spinning device

2

cooling device

3

treatment facility

4

takeup

5.1, 5.2, 5.3

melt generator

6.1, 6.2, 6.3

spinning pump

7.1, 7.2, 7.3

Spin pump drive

8.1, 8.2, 8.3

melt line

9

spinning beam

10.1, 10.2, 10.3

spinneret

11

Round nozzle package

12

inlet plate

13

distribution plate

14

nozzle plate

15.1, 15.2, 15.3

melt inlet

16.1, 16.2, 16.3

Group of nozzle holes

17.1, 17.2, 17.3

melt channels

18.1, 18.2, 18.3

filter elements

19.1, 19.2, 19.3

filter chamber

20.1, 20.2, 20.3

inlet chamber

21

blow box

22.1, 22.2, 22.3

cooling cylinder

23

pressure chamber

24

distribution chamber

25

Cooling air connection

26

perforated sheet

27

gas impermeable length section

29.1, 29.2, 29.3

composite means

30.1, 30.2, 30.3

filament bundles

31.1, 31.2, 31.3

composite thread

32.1, 32.2, 32.3

winding position

33.1, 33.2

winding spindle

34

spindle turret

35

pressure roller

36

Traversing device

37.1, 37.2, 37.3

Kitchen sink

38

dissector

39

Yarn collection device

40

Abzugsgaletteneinheit

41

godet

42

texturing

43

cooling drum

44.1,44.2

Führungsgalette

45

The interlacing

46

Manifold system

47

distribution facility

48.1, 48.2, 48.3

Collecting yarn guides

49

Galette

50

yarn plug

50.1, 50.2, 50.3

plenum

Claims (9)

1. Apparatus for producing multicoloured crimped composite threads, having a melt-spinning installation (1) for extruding a plurality of filament bundles from a plurality of dissimilarly coloured polymer melts, having a cooling installation (2) for cooling the filament bundles, having a treatment installation (3) for drafting, crimping, and gathering the filament bundles, and having a take-up winding installation (4), wherein the melt-spinning installation (1) has a plurality of melt generators (5.1, 5.2, 5.3) which are connected to a plurality of spinning nozzles (10.1, 10.2, 10.3),
   characterized in that
   each of the spinning nozzles (10.1, 10.2, 10.3) has a circular nozzle pack (11) having a plurality of groups of nozzle bores (16.1, 16.2, 16.3) which are disposed in the shape of segments on a lower side and which are connected to the melt generators (5.1, 5.2, 5.3) by way of separate melt ducts (17.1, 17.2, 17.3) and a plurality of melt inlets (15.1, 15.1, 15.3) which are configured on an upper side of the circular nozzle pack (11), such that dissimilarly coloured filament bundles (30.1, 30.2, 30.3) can simultaneously be extruded through the groups of nozzle bores (16.1, 16.2, 16.3) on the circular nozzle pack (11), wherein the filament bundles (30.1, 30.2, 30.3) that are assigned to one of the spinning nozzles (10.1, 10.2, 10.3) are in each cased gathered by one collective thread guide (48.1, 48.2, 48.3).
2. Apparatus according to Claim 1,
   characterized in that
   the circular nozzle packs (11) include one of a plurality of separate filter elements (18.1, 18.2, 18.3) for each group of nozzle bores (16.1, 16.2, 16.3).
3. Apparatus according to Claim 1 or 2,
   characterized in that
   the spinning nozzles (10.1, 10.2, 10.3) within a spinning beam (9) are of identical configuration, wherein a manifold installation (47) is disposed between the melt generators (5.1, 5.2, 5.3) and the spinning nozzles (10.1, 10.2, 10.3).
4. Apparatus according to Claim 1 or 2,
   characterized in that
   the cooling installation (2) per spinning nozzle (10.1, 10.2, 10.3) has one gas-permeable cooling cylinder (22.1, 22.2, 22.3) that is disposed so as to be coaxial with the spinning nozzle (10.1, 10.2, 10.3), and in that the cooling cylinders (22.1, 22.2, 22.3) are disposed within a blower box (21).
5. Apparatus according to Claim 4,
   characterized in that
   the blower box (21) has an upper pressure chamber (23) and a lower distribution chamber (24), and in that the lower distribution chamber (24) is connected to a cooling air source (25), wherein a perforated plate (26) for the distribution of cooling air is disposed within the blower box (21) between the distribution chamber (25) and the pressure chamber (23).
6. Apparatus according to Claim 4 or 5,
   characterized in that
   the cooling cylinders (22.1, 22.2, 22.3) in the region of the distribution chamber (24) have a gas-impermeable longitudinal portion (27), the latter forming in each case a thread outlet opening on a lower side of the blower box (21).
7. Apparatus according to one of Claims 1 to 6,
   characterized in that
   the treatment installation (3) has a plurality of godets (49) for drawing-off and drafting the filament bundles.
8. Apparatus according to one of Claims 1 to 7,
   characterized in that
   the treatment installation (3) has a plurality of texturizing nozzles (42) for crimping the filament bundles, wherein the texturizing nozzles (42) are assigned at least one cooling drum (43) for cooling the crimped filament bundles.
9. Apparatus according to one of Claims 1 to 8,
   characterized in that
   the treatment installation (2) has a plurality of entanglement apparatuses (45) for the post-treatment of the crimped threads.

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