EP3242966B1 - Spinning beams for producing melt-spun filaments - Google Patents

Description

The invention relates to a spinning beam for the production of melt-spun filaments according to the preamble of claim 1.

The known spinning beams have spinneret packs which are arranged in rows on the underside of the spinneret. Depending on the size of the system several spin-beam modules are arranged firmly next to each other, which are firmly connected to each other via pipes for the heat transfer medium. The high space requirement of juxtaposed Spinnbalkenmodule depends on the mounting situation of the heating elements and pump, which can be maintained only with great effort and possibly replaced, as this sufficient space must be present between the spinning beam modules. An adaptation to an increased plant capacity is possible only with great effort.

The EP 2122019 B1 discloses an apparatus for melt spinning synthetic elements, wherein the spin pump is disposed on a separate pump support which is spaced from the housing of the spinning beam. This results in a very large distance between the pump and the spinneret, which is associated with the technological disadvantage of a longer residence time and makes a possible expansion of the system can be realized only with great effort due to the space required.

The US 6,083,432 shows a modular spinner, in which the individual components are difficult to access due to the vertical arrangement of spin pack and pump. Each spin beam can only be equipped with a spin pack, with the boiler located outside of the modular assembly.

In the US 3,655,314 forms a heat-conducting plate is a supporting floor for receiving all components of the spinner. The plate has openings for receiving spin packs.

The US 6,736,624 discloses a support structure, below which the spin pack is arranged with the enclosing heating space.

Object of the present invention is to simplify the known spinning beam design, to allow easier access to the maintenance of the pump while compact design.

The object is achieved by a spinning beam for the production of melt-spun filaments, in which via an externally arranged extruder liquid plastic is conveyed to at least one pump, which promotes the liquid plastic to at least one spin pack with a spinneret, wherein at least the pump and the spin pack of a heat transfer medium to be heated, which is heated in a boiler.

The invention is characterized in that the pump, the boiler and an opening for receiving a spin pack are arranged in a modular assembly, which can be used and fastened one or more times in succession into a frame of a spinning beam.

As a result, the spinning beam can be expanded to include additional spin packages, so that the capacity of the system can easily be adapted to increasing production.

In this case, the modular assembly has a suspension which comprises at least two cross members. The cross members are dimensioned so that they can be used in the frame of the spinner. On the cross members, the entire structure of the modular assembly takes place.

Serves for a further improvement that the cross member are connected to at least one heat chamber such that an opening for receiving at least one spin pack is formed. The cross member and the heat chamber thus form a frame in which the openings for receiving the spin packs are arranged. The connection of the cross member with the heat chambers results in a supporting frame to which all other components of the modular assembly can be fastened

Preferably, the pump is lying and arranged transversely or orthogonal to a longitudinal side of the frame. Thus, the pump can be maintained from an operation of the scaffold without major disassembly work is required.

A further improvement is achieved in that the boiler is arranged lying and transversely or orthogonal to a longitudinal side of the frame. Both measures, namely the horizontal arrangement of the boiler and the pump orthogonal to the longitudinal side of the frame allows a more compact design of the spinner, since no space requirement between the spinning packages or between the modules is required for the maintenance of both components. This is done exclusively at the operation of the scaffold, which has enough space for changing the long heating rods and the pumps. In particular, by this arrangement of the boiler, the space required for the individual modules is reduced, whereby the lines for the liquid plastic can be designed shorter with a smaller pitch. The lateral arrangement of the boiler also allows good access to the pump and to the monomer extraction. The available space between the blower ducts is used for the boiler, so that no additional floor space is required for a separate boiler on the steel platform. The arrangement of the boiler allows a small pitch, since the heating rods are about 90 ° to the spinning beam axis.

The pump and the boiler do not have to be arranged exactly at right angles to the longitudinal member. Also, a slightly oblique arrangement of, for example, 75 ° of the longitudinal axis of the boiler and the pump to the side rail, in which the components, such as the heating elements, exchanged via the service gear would fall under the term transverse or orthogonal. In the prior art, the pump and the boiler between the spin packs are arranged removable, so that the distance between the spin packs is determined by the disassembly of the exchangeable components. According to this invention, the arrangement of the spinning beam can be done in a very close distance from each other, which makes the overall system more compact and shortens the melt-carrying lines, which means the procedural advantage of shorter residence time for the liquid plastic.

Preferably, the pump is driven by a shaft by a drive, wherein the drive is arranged on a frame outside of the spinning beam. By disassembling the shaft, the pump is easily accessible and can be easily disassembled by loosening a few screws.

By arranging several modular assemblies into a spinning beam, all boilers are connected by piping to a vacuum station and a condenser. In particular, the fact that the boilers are connected to each other by means of a pipe, creates a system of communicating tubes, creating an identical heating situation for each modular assembly.

A further improvement is achieved by the liquid plastic is passed via a flange connection by means of at least one pipe to the pump, wherein the pipes are arranged falling. Thus, no deposits of liquid plastic of different viscosity can form. The design allows in contrast to the prior art short melt lines with correspondingly short residence times for the liquid plastic.

Fig.1:

eine perspektivische Darstellung auf einen modular aufgebauten Spinnbalken;

Fig. 2:

eine perspektivische Darstellung auf den inneren Aufbau eines Spinnbalkens;

Fig. 3:

eine perspektivische Darstellung auf einen Spinnbalken mit mehreren nebeneinander angeordneten modularen Baugruppen;

Fig. 4:

eine Seitenansicht auf einen Spinnbalken mit mehreren nebeneinander angeordneten modularen Baugruppen.

The invention will be explained in more detail with reference to the accompanying drawings. In this show

Fig.1:

a perspective view of a modular spinneret;

Fig. 2:

a perspective view of the internal structure of a spinning bar;

3:

a perspective view of a spinning beam with a plurality of juxtaposed modular assemblies;

4:

a side view of a spinning beam with a plurality of juxtaposed modular assemblies.

In FIG. 1 a modularly constructed spinning beam 1 is shown, which has a peripheral frame 2 on which all the essential components are arranged or attached. The frame 2 is formed from a circumferential U or double T-beam into which a modular assembly 20a (FIG. FIG. 2 ) can be suspended or used. The frame 2 is rectangular in construction and has two narrow sides 2a and two longitudinal sides 2b. Within the modular assembly 20a openings 23a, 23b, 23c are arranged for spin packs to be inserted, which can be closed by covers 3a, 3b, 3c and insulation, which are arranged on the frame 2. Outside the spinning beam 1, a drive 4 is arranged for a pump 24, wherein the drive 4 with the pump 24 via a shaft 5 is connectable. The pump 24 is arranged lying and transversely or orthogonal to the longitudinal side of the spinner 1 and promotes the liquid plastic through the nozzles of the spin packs. The drive 4 can be arranged outside the frame 2 on a scaffold, which accommodates the modularly constructed spinning beam 1. Also within the spinning beam 1, a boiler 25 is arranged, the For example, absorbs Diphyl as a heating medium. To heat the heat transfer medium 25 openings 26 are arranged on the boiler, in the heating elements can be inserted. Outwardly, both the boiler 25 and the openings 26 for the heating elements are each closed by a cover 6, 7. Above the spinning beam 1, a vacuum station 8 is mounted with a condenser 9, which are connected via a pipe 10 to a heat chamber 27a. The heat chamber 27a corresponds to at least one further heat chamber 27b, so that the spinnerets are enclosed at least from two sides, whereby a circulating circulation of the heating medium between the vacuum station 8, the heat chambers 27a, 27b and the boiler 25 is formed. Both the condenser 9 and the vacuum station 8 are attached with their ancillaries on the spinning beam 1. A heat transfer medium, for example Diphyl, is placed inside the boiler 25 by the heating elements in a vaporous state, so that the steam flows through the heat chambers 27a, 27b. A condensate occurring within the heat cycle is returned via condensate lines to the vacuum station 8 and to the condenser 9.

FIG. 1 further shows a flange connection 11 for a pipeline, via which liquid plastic is conveyed to the pump 24 from an externally arranged extruder. The flange 11 is also attached to the spinning beam 1 and connected by means of pipes 12 to the pump 24 and the spinnerets. Furthermore, the spinning beam 1 has a walk-on surface, under which an insulation 13 is arranged.

The modular assembly 20a after FIG. 2 essentially comprises a suspension 21, which has at least two transverse beams 21a, 21b, between which the heat chambers 27a, 27b and the openings 23a, 23b, 23c are arranged for the spin packs with the spinnerets. It can be seen that in this embodiment, the spinning beam 1 is designed for three spin packs, each with a spinneret, since each opening 23a, 23b, 23c can receive a spin pack. The spinning beam 1 can also be designed only for a spinning package, two spin packages, or for more than three spin packages. In the longitudinal direction of the spinning beam 1 so the spin packs are arranged one behind the other to produce a variable number of spinning lines. The heat chambers 27a, 27b are an integral part of the suspension 21 and connect the cross members 21a, 21b with each other, so that a self-supporting modular assembly 20a is formed within the spinner 1. In order for the heat transfer medium to circulate, the heat chambers 27a, 27b are connected to one another in the region of the cross members 21a, 21b in such a way that the spin packages are evenly heated on two further sides, the end faces. On the cross members 21a, 21b pads 22a - 22d are arranged, with which the modular assembly 20a in the frame 2 or in a framework can be suspended. On the opposite side to the heat chambers 27a, 27b, the boiler 25 is arranged lying on the cross member 21b. For this purpose, angle profiles are arranged on an end face on the cross member 21a, 21b, in which the boiler 25 is adjustably mounted in the embodiment. The boiler 25 is placed horizontally so that the openings 26 for the heating rods are accessible without further disassembly from a gangway of a scaffold. For this purpose, the boiler 25 is arranged transversely or orthogonally to a longitudinal side 2b of the frame 2 or to the longitudinal side 2b of the spinning beam 1. Another pipeline 10 leads the heat transfer medium from the heat chamber 27b to the condenser 9.

The modular assembly 20a thus includes the suspension 21, which is connected by the two transverse beams 21a, 21b with the heat chambers 27a, 27b arranged therebetween. The heat chamber 27a is connected via a pipe 28 to the boiler 25, which is also part of the modular assembly 20a. Another component of the modular assembly 20a is the pump 24, on or in the area of Heat chamber 27b is arranged horizontally and supplies all integrated within the assembly spinnerets with extruded plastic, as well as the pipe 10. The cross member 21a, 21b further have pads 22a - 22d, where the modular assembly 20a in the frame 2 or in a frame can be suspended and attachable.

The pump 24, which is connected via a shaft 5 to the drive 4, is supplied via the pipe 12 with liquid plastic from an outside of the spinning beam 1 arranged extruder. For this purpose, the liquid plastic is passed to the pump 24 via the flange connection 11 and from there via further pipelines to the spinnerets. It is advantageous that all pipelines which conduct liquid plastic to the spinnerets are arranged to fall, so that a backflow of the liquid melt to the extruder or to the pump 24 during the exchange of components is avoided. Within the pipes for liquid plastic, such as the pipe 12, mixers can be integrated at one or more points, which mix the molten plastic.

In the embodiment of Figures 3 and 4 four modular assemblies 20a, 20b, 20c, 20d are arranged on a frame 2 and form the spinning beam 1. Each modular assembly 20a - 20d is suspended with two cross members 21a, 21b in the frame 2, wherein the pads 22a - 22d on a profile rest of the frame 2 and are connected to this. Each modular subassembly 20a-20d, in this exemplary embodiment, can accommodate two spin packs each having a spinneret which can be inserted into the openings 23a, 23b and closed by the covers 3a, 3b. Under the covers 3a, 3b, the spin packs can be insulated by insertable heat blocks upwards, which have a circumferential seal to avoid a chimney effect within the opening 23a, 23b. The spin packs are arranged in parallel between the longitudinal sides 2b of the frame 2.

A vacuum station 8 and a condenser 9 are connected for the heat cycle of all modules with all boilers 25 via pipes, from each boiler 25, a pipe 28, the heat transfer medium to the heat chambers 27a directs. The boilers 25 are connected to each other via a pipe 14, so that the same heat cycle results for each modular assembly 20a - 20d even with multiple arrangement. All spinning packages are supplied with liquid plastic from an external extruder via a single flange connection 11. For this purpose, a pipe 12 is arranged, which, starting from the flange connection 11, directs the liquid plastic to the pumps 24. The front side of the spinning beam 1, in the area of which the drives 4 are arranged, is easily accessible to the operating personnel for the maintenance of the pumps 24, so that the heating elements in the boilers 25 can also be changed from this side. For this purpose, the boiler 25 are arranged horizontally and transversely or orthogonal to the longitudinal side 2b of the frame 2. Due to the fact that the pump 24 is also arranged lying horizontally or orthogonally to the longitudinal side of the spinning beam 1, the entire spinning beam 1 can be maintained from one position. Both measures, namely the horizontal arrangement of the boiler 25 and the pump 24 transversely or orthogonal to the longitudinal side of the frame 2 allows a more compact design of the spinner 1, since no space requirement between the spinning packages or between the modules is required for the maintenance of both components. This takes place exclusively at the operating passage of the scaffold, which has enough space for changing the long heating rods and the pumps 24.

reference numeral

1

spinning beam

2

frame

2a

narrow side

2 B

long side

3a-c

cover

4

drive

5

wave

6

cover

7

cover

8th

vacuum station

9

condenser

10

pipeline

11

flange

12

pipeline

13

insulation

14

pipeline

20a - 20d

modular assembly

21

suspension

21a, b

crossbeam

22a - 22d

edition

23a - 23c

opening

24

pump

25

boiler

26

opening

27a, b

heat chamber

28

pipeline

Claims (7)

1. A spin beam for producing melt-spun filaments, in which, via an externally disposed extruder, liquid plastic material is conveyed to at least one pump, which conveys the liquid plastic material to at least one spin pack with a spinning nozzle, wherein at least the pump and the spin pack are heated by means of a heat carrying medium, which is heated in a boiler, characterized in that at least the pump (24), the boiler (25) and an opening (23) for the reception of a spin pack are disposed in a modular construction group (20), which are insertable and attachable individually or multiple times one after the other into a frame (2) of the spin beam (1), wherein the modular construction group (20) includes a suspension fixture (21), which comprises at least two transverse supports (21a, 21b), which together with at least one heating chamber (27a, 27b) form a carrying frame, in which at least one opening (23) is disposed for the reception of at least one spin pack.
2. The spin beam according to claim 1, characterized in that the pump (24) is disposed in a recumbent and transverse manner, respectively orthogonally to a longitudinal side (2b) of the frame (2).
3. The spin beam according to claim 1, characterized in that the boiler (25) is disposed in a recumbent and transverse manner, respectively orthogonally to a longitudinal side (2b) of the frame (2).
4. The spin beam according to any of the preceding claims, characterized in that the pump (24) is driven by a drive (4) by means of a shaft (5), wherein the drive (4) is disposed at a rack outside the spin beam (1).
5. The spin beam according to claim 1, characterized in that several modular construction groups (20a, 20b, 20c, 20d) form one spin beam, wherein a vacuum station (8) and a condenser (9) are connected to all boilers (25) by means of pipelines.
6. The spin beam according to claim 1, characterized in that the boilers (25) are connected to each other by means of a pipeline (14).
7. The spin beam according to any of the preceding claims, characterized in that the liquid plastic material is guided to the pumps (24) via a flange connection (11) by means of at least one pipeline (12), wherein the pipelines are disposed in an dropping manner.

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