Distribution block for adjusting a depositing width of a spinning beam

Abstract

The invention relates to a distribution block (20) for adjusting a depositing width (ABL) of a spinning beam (1) for forming a synthetic nonwoven (V), wherein the distribution block can be coupled fluid-tightly to the spinning beam (1), which has a plurality of spinning pumps (90) that supply a spinning nozzle package (2) with a plastic melt. The distribution block (20) is positioned between the spinning beam and a plastic melt supply device (100) for supplying the spinning beam (1) with the plastic melt. The invention also relates to a melt spinning device for producing a nonwoven from a plurality of filaments using the distribution block.

Description

[0001] Distribution block for setting the storage width of a spinneret

[0002] The invention relates to a distribution block for setting a laying width of a spinning beam and a melt spinning device for producing a nonwoven fabric with the distribution block.

[0003] It is known from the general state of the art to adjust the laying width of a nonwoven fabric using a spinning beam.

[0004] DE 10 2007 032 107A1 discloses a device for melt spinning a series of filament sheets with a spinning bar for receiving an elongated spinneret assembly. The spinneret assembly includes a nozzle plate with a plurality of nozzle bores on its underside and an inlet plate with several inlet channels evenly distributed along its length on its upper side. Several melt feeders are assigned to the spinning bar. In order to produce filament sheets of different working widths on the spinning bar, an interchangeable connection plate is arranged between the spinneret assembly and the melt feeders, according to the invention. This connection plate has a channel system for connecting the inlet channels on the inlet plate to the melt feeders.

[0005] With the device described above, changing the lay-up width of the spinning beam requires opening the spinning beam every time. This is very time-consuming. Furthermore, any heat transfer fluid present in the spinning pack must be evacuated before opening. This is also very time-consuming and can lead to environmental damage if the heat transfer fluid is not properly stored and / or disposed of.

[0006] The object of the invention is therefore to provide a device for a spinning beam by means of which the laying width of a nonwoven fabric on a lay-up belt can be adjusted easily and in an environmentally friendly manner. According to the invention, this object is achieved with a distribution block having the features of claim 1.

[0007] According to one aspect of the invention, a distribution block is provided for adjusting the lay-up width of a spinning beam for forming a synthetic nonwoven fabric, wherein the distribution block can be coupled fluid-tight to the spinning beam, which has a plurality of spinning pumps that supply a spinneret assembly with a polymer melt. The distribution block is positioned between the spinning beam and a polymer melt supply device for supplying the spinning beam with the polymer melt.

[0008] With the distribution block according to the invention, it is possible to supply a spinning beam section by section with plastic melt and thus to adjust the size of the laying width of a nonwoven fabric that can be laid down with a spinning beam.

[0009] This is achieved in a particularly simple and straightforward manner. The distribution block has a setting that allows the molten plastic to be supplied to a predetermined number of spinning pumps in the spinning beam.

[0010] If a spinning pump should not receive any plastic molten plastic, it is possible to interrupt the plastic supply using the distribution block.

[0011] This can be done in a simple way, as the distribution block is accessible and does not require any simple or complex assembly or adjustment of the spinner beam itself.

[0012] All necessary steps to adjust the lay-up width of the spinning beam can be performed via the distribution block. It is also possible to produce two separate webs across the lay-up width using the distribution block. This is achieved by depriving one of the spinning pumps, located centrally in the spinning beam, of molten plastic, a function made possible by the distribution block.

[0013] According to a preferred embodiment of the distribution block, the distribution block has a distribution block housing with a supply channel that can be coupled fluid-tight to the plastic melt supply device, and a feed channel for supplying the plastic melt to the associated spinning pump.

[0014] The distribution block is a housing containing various lines and / or channels for receiving the molten plastic and distributing it to the spinning beams and associated spinning pumps. The distribution block, or its housing, receives the molten plastic from a molten plastic supply device via a supply channel. The molten plastic is then distributed to the associated spinning pumps via a feed channel.

[0015] Depending on the number of spinning pumps, the number of feed channels also increases, or their passage to the spinning pumps is continuously opened via the distribution block.

[0016] According to another preferred embodiment of the distribution block, the supply channel is positioned approximately in the middle of the distribution block and the respective feed channel is positioned essentially radially around the supply channel.

[0017] The distribution block is designed in such a way as to allow for the simplest possible feeding and / or distribution of the plastic melt.

[0018] For this purpose, the distribution block, in its central arrangement, has a feed channel in which the molten plastic is received by the molten plastic supply device. To ensure that the molten plastic is easily distributed to the spinning pumps, a supply channel extends radially from the feed channel, through which the molten plastic can be fed to the spinning pumps or a spinning pump assembly block.

[0019] According to a particularly preferred embodiment of the distribution block, the supply channel and the feed channel can be coupled to each other in a fluid-tight manner, at least in sections, by means of a deflection device and / or can be blocked in a fluid-tight manner.

[0020] The feeding and blocking of the distribution block and its associated supply channels to the spinning pumps is accomplished using a diverting device. This diverting device has corresponding recesses and channels that allow for the coupling or blocking of the respective feed channel to the spinning pump.

[0021] This allows for simple control of the lay-up width of the spinning beam and the associated spinning pumps. The spinning beam does not need to be opened for this purpose.

[0022] According to a preferred embodiment of the distribution block, the deflection device is plate-shaped and has a collecting channel for collecting the polymer melt and a receiving distribution channel for distributing the polymer melt.

[0023] The deflection device is preferably designed in a plate-like shape, so that the distribution block has the smallest possible dimensions.

[0024] The associated collecting channels and receiving distribution channels are formed as recesses in the plate-shaped deflection device. When the deflection device is fluid-tightly mounted to the distribution block, the deflection device and the distribution block together form the associated channels. In a particularly preferred embodiment of the distribution block, a coupling flange for fluid-tight coupling with the melt supply line is provided on the distribution block housing.

[0025] The distribution block housing is equipped with coupling flanges for connecting the melt supply lines to the spinning pumps of the spinning beam.

[0026] The melt supply line can then be mounted and coupled to the coupling flanges, thus enabling a fluid-tight connection.

[0027] According to a further preferred embodiment of the distribution block, the distribution block housing can be coupled fluid-tight to a spinning pump mounting block of the spinning beam by means of the coupling flange.

[0028] The function of the distribution block housing is to provide a simple and straightforward fluid-tight connection to the spinning beam, specifically to a spinning pump mounting block on the spinning beam. The spinning pump mounting block includes corresponding spinning pump receptacles and distribution lines leading to a spinneret.

[0029] This allows for a simple coupling with the plastic supply via the distribution block, without having to open the spinneret.

[0030] Furthermore, it is an object of the invention to provide a melt spinning device for producing a nonwoven fabric from a plurality of filaments, with which the above-mentioned problems can be prevented or at least mitigated.

[0031] The problem is solved according to the invention with regard to the melt spinning device by means of a melt spinning device having the features of claim 8. According to another aspect of the invention, a melt spinning device is provided for producing a nonwoven fabric from a plurality of filaments by means of a spinning beam and with a distribution block for setting a lay-up width of the nonwoven fabric according to at least one of the preceding embodiments.

[0032] The distribution block is particularly suitable for use with a melt spinning device for producing a nonwoven fabric. This eliminates the need to open and close the associated spinning beam to change its laying width.

[0033] This can all be done via the distribution block. This also prevents environmental impact, as the spinning beam has a housing that contains a heat transfer fluid. With the distribution block, changing the lay-up width does not require opening the spinning beam, thus preventing the heat transfer fluid from escaping into the environment.

[0034] The heat transfer fluid ensures that the spinning beam and the polymer melt are kept at a sufficiently high temperature, preventing the polymer melt from cooling too quickly and becoming unusable for extrusion. The temperature of the polymer melt and / or the heat transfer fluid can reach up to 330°C.

[0035] A drop in temperature leads to solidification of the plastic melt, which should be prevented, especially in the area of ​​the spinneret.

[0036] In a preferred embodiment of the melt spinning device, a spinning pump mounting block of the spinning beam has a spinning pump receptacle for receiving a spinning pump and / or a distribution block for distributing the polymer melt to the spinneret assembly. The spinning beam has a spinning pump mounting block for coupling the distribution block to the spinning beam. The spinning pump mounting block has a spinning pump receptacle and the associated lines, referred to here as the distribution block, which can distribute the polymer melt to the spinneret assemblies.

[0037] The spinneret assembly has a predetermined hole spacing. The distribution block allows adjustment of the hole spacing of the spinneret assembly, thereby adjusting the lay-up width of the nonwoven fabric.

[0038] According to a further preferred embodiment of the melt spinning device, a plastic melt supply device for forming the plastic melt comprises an extruder with an extruder screw.

[0039] The plastic melt supply device is preferably an extruder with an extruder screw that provides plastic chips to a plastic melt by means of the extruder screw.

[0040] However, the plastic melt supply device can also be a corresponding polycondensation device with which the plastic melt can be produced and fed directly to the distribution block.

[0041] The distribution block and the melt spinning device according to the invention are explained in more detail below with reference to some exemplary embodiments of the distribution block and the melt spinning device according to the invention and the accompanying figures.

[0042] They represent:

[0043] Fig. 1 schematically shows a perspective view of a spinning beam of a melt spinning device for producing a nonwoven fabric from a plurality of filaments with the associated take-off nozzle and depositing belt; Fig. 2 schematically shows a view of an embodiment of a distribution block according to the invention, which is fluid-tightly coupled to the spinning beam and a plastic melt supply device.

[0044] Fig. 3 schematically shows a sectional view of the spinner beam and the distribution block from Fig. 2.

[0045] Fig. 4 schematically shows a sectional view of the spindle beam from Fig. 1, and

[0046] Figs. 5 and 6 show different examples of the implementation of a deflection device for the distribution block.

[0047] In the figures described below, features are indicated by numbers 1 to n. The placeholder n is a natural number representing a specific quantity of that feature. This quantity can vary depending on the desired size and width of the spindle beam 1 and the fleece V to be produced.

[0048] Fig. 1 schematically shows, in a perspective view, a spinning beam 1 of a melt spinning device for producing a nonwoven fabric V from a plurality of filaments F, with an associated take-up nozzle 3 and a lay-up belt 5. The filaments F are laid down on the lay-up belt 5. The lay-up belt 5 has a vacuum suction, which is not shown in Fig. 1.

[0049] Furthermore, the conveyor belt 5 can be moved via a deflection roller, so that the fleece can be transported to a laying and winding device (not shown).

[0050] The spinning beam 1 has a spinning beam housing 10 to which melt supply lines 7 are fluid-tightly coupled with spinning pumps 90. The spinning pumps 90 are driven by a drive shaft 9. Each melt line 7.1 to 7.n is fluid-tightly coupled to an associated spinning pump 90.1 to 90.n. Each spinning pump 90.1 to 90.n has its own drive shaft 9.1 to 9.n. The deposit area of ​​the depositing conveyor 5 has a deposit width ABL on the conveyor 5 and can be subdivided into a first deposit width, a second deposit width ABL2, a third deposit width ABL3, and an nth deposit width ABLn. Each deposit width ABL1 to ABLn has its own spinning pump 90.1 with its own drive shaft.

[0051] 9.1 on.

[0052] Fig. 2 shows in a schematic view an embodiment of the distribution block 20 according to the invention, which is fluid-tightly coupled to the spinning beam 1 and a plastic melt supply device 100.

[0053] In the embodiment shown in Fig. 2, the plastic melt supply device 100 is an extruder 101 that can be supplied with plastic flakes or chips. The plastic chips or flakes are melted by an extruder screw 102 and processed into a plastic melt 8.

[0054] The molten plastic is conveyed to the distribution block 20 via a melt supply line 8.

[0055] The plastic melt is then distributed via a collecting channel 24 in the distribution block to receiving distribution channels 25 in the distribution block 20 and fed to melt supply lines 7.

[0056] Each spinning pump 90.1 to 90.n has its own first to nth melt feed line.

[0057] 7.1 to 7.n.

[0058] The melt supply lines 7.1 to 7.n are detachably mounted on the distribution block 20 and on the spinning beam 1 with coupling flanges 27.

[0059] The first to nth spinning pumps 90.1 to 90.n are positioned in the spinning beam 1 with their associated first to nth drive shafts 90.1 to 90.n. Fig. 3 schematically shows a sectional view of the spinning beam 1 and the distribution block 20 from Fig. 2.

[0060] The spindle beam housing 10 has a space for providing a heat transfer medium. Furthermore, the spindle beam housing 10 provides a receptacle for a mounting housing 92.

[0061] The mounting housing 92 can accommodate the spinneret 2 and, on the opposite end section, a spinneret mounting block 91 for supplying the plastic melt and for receiving the associated spinneret 90 with the associated drive shaft 9.

[0062] The spinning bar housing 10 can be heated to a predetermined temperature using a heat transfer medium. Instead of a heat transfer medium, such as Diphyl®, the spinning pump housing can also be heated electrically, either additionally or alternatively, to prevent the polymer melt from solidifying prematurely before it leaves the spinneret 2.

[0063] The molten plastic is fed to the spinning bar 1 via the melt supply line 7. The melt supply line 7 is connected to the spinneret housing 10 via a coupling flange 27 and to the distributor block 20 via another coupling flange 27.

[0064] Each spinning pump 90.1 to 90.n has its own melt supply line 7.1 to 7.n, preferably each melt supply line 7 having the same length so that a plastic melt of substantially the same temperature can be supplied to the associated spinning pump via all melt supply lines 7. The distributor block 20 has a distributor block housing 28 and a deflection device 21.

[0065] Distribution block housing 21 contains distribution channels 22 and a supply channel 23. The plastic melt is supplied from the plastic melt supply device 100 to the distribution block 20 via a melt supply line 8 through the supply channel 23.

[0066] The deflection device 21 has a collecting channel 24 which is in fluid-tight connection with the distribution channel via a receiving distribution channel 25.

[0067] Fig. 4 schematically shows a sectional view of the spinneret 1 from Fig. 1. It can be seen that the spinneret 1 has a spinneret assembly 2 that is shown essentially throughout. The spinneret assembly defines a hole width 4 through which filaments F can be extruded onto the lay-up belt 5.

[0068] As can also be seen from Fig. 4, each spinning pump 90.1 to 90.n has its own first to nth drive shaft 9.1 to 9.n.

[0069] In the embodiment shown in Fig. 3, the mounting housing 92 has separating webs 93 between the spinning pumps 92. In an embodiment not shown, there may be no separating web between the spinning pumps 92 and / or the separating web may be removable and mounted at the indicated position.

[0070] The spinning pumps 90.1 to 90.n are fluid-tightly mounted in a spinning pump receptacle 95 within the spinning pump mounting block 91. Furthermore, the spinning pump mounting block 91 has, in addition to the spinning pump receptacle 95, lines of a block distribution system 96, through which the polymer melt is conveyed via spinneret lines 94 in the mounting housing 92 to the spinneret assembly 2. Figures 5 and 6 show different embodiments of the deflection device 21 of the distribution block 20.

[0071] Fig. 5 shows a deflection device 21 in which the receiving distribution channels 25 extend radially from the collecting channel 24, so that each spinning pump 90 is located in the spinning beam

[0072] 1 can be supplied with a plastic melt.

[0073] Fig. 6 shows another embodiment of the deflection device 21. Here, only three receiving distribution channels 25 are fluid-tightly connected to the collecting channel 24.

[0074] The other receiving distribution channels 25 are not formed in the deflection device 21, but are blocked by a blockage 26, so that no plastic melt can be conveyed via the blockage 26 to the associated spinning pumps 90. This allows the lay-up width ABL of the nonwoven fabric V on the lay-up belt 5 to be adjusted.

[0075] The blockage 26 can be a plug that fluid-tightly blocks the affected receiving distribution channel 25 and / or there is no receiving distribution channel formed at the corresponding location in the deflection device 21.

[0076] Reference point list:

[0077] 1 Spinnbärken

[0078] 10 Spindle beam housings

[0079] 2 spinneret packs

[0080] 3 Extraction nozzle

[0081] 4-hole field width

[0082] 5. Filing belt

[0083] 7 Melt supply line

[0084] 7.1 - 7.n first to nth melt feed line

[0085] 8 Melt supply line

[0086] 9 Drive shaft

[0087] 9.1 - 9.n first to nth drive shaft

[0088] 90 spinning pump

[0089] 90.1 - 90. n first to nth spinning pump

[0090] 91 Spinning pump mounting block

[0091] 92 Mounting housings

[0092] 93 dividing bridge

[0093] 94 Spindle nozzle line

[0094] 95 spinning pump holder

[0095] 96 Block distribution

[0096] 100 plastic melt supply devices

[0097] 101 Extruders

[0098] 102 Extruder screw

[0099] 20 distribution block

[0100] 21 Deflection device

[0101] 22 distribution channel

[0102] 22.1 - 22. n first to nth distribution channel

[0103] 23 Supply channel

[0104] 24 Collection channel

[0105] 25 Receiving distribution channel 26 Blockade

[0106] 27 Coupling flange

[0107] 28 distribution block housings

[0108] ABL layup width F Filament

[0109] V fleece

Claims

Patent claims 1. Distribution block (20) for setting a lay-up width (ABL) of a spinning beam (1) for forming a synthetic nonwoven fabric (V), wherein the distribution block is fluid-tightly coupling to the spinning beam (1), which has a plurality of spinning pumps (90) that supply a spinneret package (2) with a polymer melt, characterized in that the distribution block (20) is positioned between the spinning beam and a polymer melt supply device (100) for supplying the spinning beam (1) with the polymer melt.

2. Distribution block (20) according to claim 1, characterized in that the distribution block (20) has a distribution block housing (28) with a supply channel (23) which can be coupled fluid-tightly to the plastic melt supply device (100) and a feed channel (22) for supplying the plastic melt to the associated spinning pump (90).

3. Distribution block (20) according to at least one of the preceding claims 2 or 3, characterized in that the supply channel (23) is positioned approximately centrally in the distribution block (20) and the respective feed channel (22; 22.1-22.n) is positioned substantially radially around the supply channel (23).

4. Distribution block (20) according to at least one of the preceding claims, characterized in that the supply channel and the feed channel can be coupled to each other fluid-tight and / or blocked fluid-tight at least section by means of a deflection device (21).

5. Distribution block (20) according to at least one of the preceding claims, characterized in that the deflection device (21) is plate-shaped. and has a collection channel (24) for collecting the polymer melt and a receiving distribution channel (25) for distributing the polymer melt.

6. Distribution block (20) according to at least one of the preceding claims, characterized in that a coupling flange (27) for fluid-tight coupling with the melt supply line (7) is formed on the distribution block housing (28).

7. Distribution block (20) according to at least one of the preceding claims, characterized in that the distribution block housing (28) can be coupled fluid-tight to a spinning pump mounting block of the spinning beam by means of the coupling flange.

8. Melt spinning device for producing a nonwoven fabric from a plurality of filaments by means of a spinning beam and with a distribution block for setting a laying width of the nonwoven fabric according to at least one of the preceding claims 1 to 7.

9. Melt spinning apparatus according to claim 8, characterized in that a spinning pump mounting block of the spinning beam (1) has a spinning pump receptacle (95) for receiving a spinning pump (90) and / or a block distributor (96) for distributing the plastic melt to the spinneret package.

10. Melt spinning device according to at least one of the preceding claims 8 or 9, characterized in that a plastic melt supply device for forming the plastic melt has an extruder (101) with an extruder screw (102).

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