EP0748397B1 - Spin-die manifold - Google Patents

Description

In a first aspect, the invention relates to a Spinning beam for melt spinning synthetic filaments Polymers, especially for spinning fine filaments. For example, the bar consists of a heating box with integrated melt pumps, melt lines and Spinneret recordings. Via the integrated in the spinning beam Melt lines will be from the processing in the bars entering melt on the spinning pumps or the nozzle pots distributed.

In a second aspect, the invention relates to a Heating system for a replaceable part of a spinning beam for spinning continuous filaments, e.g. made of polyamide, polyester or polypropylene.

An example of such a part is the so-called nozzle package, that operates in a "jet throat" in the spinning beam is included and for cleaning with a similar package must be replaced periodically. The jet throat is in a heating box provided. The nozzle pack contains the nozzle plate, which is provided with holes in which the filaments are formed from the melt mass. The nozzle package, and in particular the nozzle plate, must be in use maintain a predetermined temperature, heat continuously flows out of the package. The package itself usually includes no heating device, its heat loss must rather redeemed by heat transfer from its wearer become. In such an arrangement, it turns out Problem of sufficient heat transfer from the support section on the interchangeable part.

State of the art:

From DE-Gbm 84 07 945 a spinning beam is known, the one circular cross section. As an advantage of those shown in it It is specified that the nozzle packages where the filaments are formed, and the spinning pumps, the polymer convey into these packages, enclosed by walls are and the space directly and evenly with vapor Heat transfer medium is filled. A similar arrangement is shown in EP 163 248 (Fig. 4).

To avoid heat loss, spinning beams are attached to the External surfaces largely insulated. But it is constructive not possible, the downward facing outer surface in the area to isolate the nozzle packs sufficiently, because of the increased layer thickness the immediate cooling of the filaments immediately after exiting the nozzle bores by introducing a cooling device, in particular one Pale shaft, would be prevented.

Because especially in the production of very fine filaments the amount of molten polymer flowing through is relatively small, so that heat loss is not or only difficult due to the heat input from the molten polymer can be compensated for, spinning beams, such as Already stated above, with one heated up to the vapor phase Heat carriers are fed, so that the mentioned Heat losses compensated for by the condensation of the steam can be.

It is particularly important here that the non-insulated nozzle plates to be heated sufficiently and evenly. This Task can, however, by means of the spinning beam according to the state of the Technology can only be insufficiently fulfilled, especially in this area of heat transfer through condensation of a vaporous heat transfer medium due to the unfavorable geometric Conditions as well as the accumulating condensate on severely restricted, and at the same time heat loss of the bar due to the insufficient training Isolation are greatest.

Examples of measures that have been taken so far the problems of adequate heat transfer to the nozzle plate can be found in EP-A-163248. The The measures mentioned are mainly aimed at a heat transfer path (a "thermal bridge") between the permanently mounted carrier section and the nozzle package form. It is generally assumed (without further details) that that the system is able to do the required Bring the amount of heat to the beam end of the thermal bridge. However, this assumption is not justified.

The invention:

The object of the invention in the first aspect is therefore in reducing the heat loss of a spinning beam. This object is achieved by a spinning beam according to claim 1 solved. The one for heating the relatively wide spans Spinning pump blocks in the upper area of the beam necessary Space is preserved. A geometric change in the interior structure in the lower area by additional ribs for Enlargement of the heat exchange area with simultaneous Ensuring the condensate drain can significantly improve contribute to the heating of the nozzle packs, such as hereinafter in connection with the second aspect of the invention is described in more detail.

• die kostengünstige Verbindung des Pumpenantriebs mit der Spinnpumpe unter Berücksichtigung der unvermeidlichen Wärmedehnung des Spinnbalkens,
• die Erzeugung eines dampfförmigen Wärmeträgers und seine Zufuhr zum Heizkasten mit vertretbaren Wärmeverlusten im Zuleitungssystem.

Furthermore, the writings already mentioned have no solutions to two further problems, namely

• the cost-effective connection of the pump drive to the spinning pump, taking into account the inevitable thermal expansion of the spinning beam,
• the generation of a vaporous heat transfer medium and its supply to the heating box with reasonable heat losses in the supply system.

The first object is achieved in that the gear motors are mounted on consoles, which in turn are firmly attached to the Heating box are connected.

The second task is carried out by a spinning beam Claim 2 solved. The one mentioned in claim 2 Evaporator is preferably through one or more Condensate and steam lines connected to the spinning beam, can, however, in a less preferred embodiment with a combined, sufficiently dimensioned steam pipe with simultaneous condensate return.

In the preferred solution, all three are mentioned Tasks through a combination of the features mentioned solved.

It is the object of this invention in the second aspect Heat flow between a heated carrier in a spinning beam and to design a worn part in such a way that this flow always runs in a given direction.

The solution to this task arises from the characteristic Part of claim 3.

The fact that the temperature gradient always in the direction of carried part, it is ensured that not yet more heat is withdrawn from the nozzle package via the thermal bridge becomes. If it can also be ensured that the Temperature gradients as steep as possible towards the worn Partly runs, the heat transfer to the worn Part can be optimized.

The heating system preferably comprises a condensation heater with saturated steam as the heating medium. Expediently then an at least sufficient condensation surface on the Thermal bridge provided to provide the required heat to ensure the saturated steam to the thermal bridge. The condensation surface can also be at a distance from the thermal bridge provided that the heat flow not so far affected by the area of the bridge is that the intended temperature gradient is endangered.

The condensation surface is preferably designed in this way and / or such an aid is provided that the area exposed to saturated steam (and not condensate) during operation becomes. The condensation surface is preferred smooth to promote the drainage of condensed saturated steam. The surface tension can also e.g. by a Coating can be increased to promote droplet formation. The tool can e.g. a drain pipe for continuous Include removing condensate from the surface.

A plurality of thermal bridges are usually formed, the parts to be heated are assigned. It individual heat absorption elements can then be provided, which are each assigned to a thermal bridge. But it can a larger heat absorption element can also be provided, that is assigned to a plurality (e.g. all) of thermal bridges.

The condensation area should be as large as possible. But it is also supposed to be a heat conduction path from the surface up to the bridge, which is sufficient (preferably has the largest possible cross section. The area can be provided on an element that is in a Tapered direction away from the bridge.

Fig. 1

schematisch im Querschnitt ein Spinnbalken nach der vorangehenden Anmeldung PCT/CH94/00123,

Fig. 2

schematisch im Querschnitt ein Spinnbalken nach dieser Erfindung,

Fig. 3

eine Frontansicht vom Heizkasten des Spinnbalkens nach Figur 2,

Fig. 4

einen Plan des Spinnbalkens nach Figur 2,

Fig. 5A und 5B

eine Alternativanordnung der Wärmeaufnahmeelemente, wobei Fig. 5B eine Ansicht in Richtung des Pfeils B in Fig. 5A darstellt, und

Fig. 6A und 6B

eine weitere Ausführung der Wärmeaufnahmeelemente am oberen Ende des Rachens für das Düsenpaket, wobei Fig. 6B eine Ansicht in Richtung des Pfeils B in Fig. 6A darstellt.

Exemplary embodiments according to the invention are explained in more detail below with reference to the figures of the drawings. It shows:

Fig. 1

schematically in cross section a spinning beam according to the previous application PCT / CH94 / 00123,

Fig. 2

schematically in cross section a spinning beam according to this invention,

Fig. 3

3 shows a front view of the heating box of the spinning beam according to FIG. 2,

Fig. 4

3 shows a plan of the spinning beam according to FIG. 2,

5A and 5B

an alternative arrangement of the heat absorbing elements, wherein Fig. 5B is a view in the direction of arrow B in Fig. 5A, and

6A and 6B

a further embodiment of the heat absorption elements at the upper end of the throat for the nozzle package, FIG. 6B showing a view in the direction of arrow B in FIG. 6A.

Figure 1 shows a section of a spinning beam with a nozzle pack (in particular a nozzle plate holder). The spinning beam comprises a heating box 100, in which not protruding melt lines and melt pumps protrude, as for example in the figures of DE-Gmb 8407945 is shown. A receptacle 102 is in the heating box 100 used, for example by welding that from the Wall 103 exists, which extends inwards through floor 104 ago is complete. The receptacle 102 encloses the cylindrical Interior 105 (the "jet throat") into which the Nozzle pot 106 is inserted. The interior goes for this purpose 105 via the cylindrical opening 107 into the outside space about. The bottom 104 is through the melt channel 108 enforced, which is connected to a melt pump, not shown is.

The nozzle pot 106 is a rotating body, it is in the Figure as the receptacle 102 shown in section. The nozzle pot 106 consists of stacked components, namely from the nozzle plate 109, the filter housing 110 and the threaded ring 111. These three components are in the hollow cylinder 112 used, the with its paragraph 113 the nozzle plate 109 wears. On the side of the threaded ring 111 the hollow cylinder 112 is provided with the internal thread 114, in that the threaded ring 111 is screwed in with its external thread 115 is. Around the threaded ring 114 in the hollow cylinder 112 screw in, the threaded ring 111 with the blind holes 116 and 117 provided with a matching hook wrench fits. Screwing the threaded ring 111 into the hollow cylinder 112 is by the cylindrical projection 118 on the side of the filter housing 110 facing the nozzle plate 109 limited. If when screwing in the threaded ring 111 the Projection 118 abuts surface 119 of nozzle plate 109, the entire length of the nozzle pot 106 is determined. Inside the cylindrical projection 118 is one annular recess present through the sealing ring 120 is filled out. The sealing ring 120 is by the Pressure of a mass to be processed, taking up the space 121 between the surface 119 and the lower surface 122 of the filter housing 110 fills outwards against the cylindrical projection 118 pressed, whereby under the effect of this pressure automatically matches the pressure customized Seal between the filter housing 110 and the Nozzle plate 109 results.

The hollow cylinder 112, which is part of the nozzle pot 106 with its shoulder 113 carries the nozzle plate, in turn held in the receptacle 102 by means of the Shoulder 123, the in the installed state shown Opposition 124 on the hollow cylinder 112 face. Shoulders 123 are components of the inserts 125, which in the Wall 103 of the receptacle 102 inserted and with the wall 103 are screwed tight, by means of the bolts 126. The shoulders 123 and the pads 124 together form one Bayonet lock that axially locks the nozzle cup 106. At the same time, the bayonet catch forms over the shoulders 123 and the pads 124 a direct thermal bridge, over which directly heats the nozzle plate 9. By twisting the hollow cylinder 12 and thus the nozzle pot 106 by approx. The connection between the holder 102 and the nozzle pot becomes 90 ° 106 solved. The nozzle pot 106 can then be cylindrical Opening 107 removed from the receptacle 102 and disassembled into its parts, for example for cleaning of the filter housing 110 and the nozzle plate 109.

When inserting the nozzle pot 106 into the receptacle 102 the washer 127 to act, which is essentially in conical formation is inserted in the threaded ring 111, a conical to accommodate the sealing washer 127 Has inner surface 128. The sealing washer 127 supports with its outer edge 129 on the ring shoulder 130 from, which are part of the lying on the filter housing 110 Melt distributor 131 is. This melt distributor 131 is part of the nozzle pot 106 here, it serves to the melt flowing in through the melt channel 108 inside to distribute the nozzle pot cheaply.

In the assembled state of the nozzle cup 106 is supported the sealing washer 127 from the annular shoulder 130, being in contact with the conical inner surface 128 of the Threaded ring 111 vertically upwards into the bottom 132 leaks, which surrounds the through hole 133, which with the Melt channel 108 is aligned.

As the figure shows, the bottom 132 of the sealing washer 127 slightly in relation to the surface 134 of the threaded ring 111 so that when you close the bayonet catch the bottom 132 to the bottom surface 135 of the bottom 104 of the receptacle 102 is tight. So that is the seal between the bottom penetrated in front of the melt channel 108 104 of the receptacle 102 to the nozzle pot 106, and taking advantage of the inside of the nozzle pot 106 prevailing pressure, which the sealing washer 127 depending on Height of this pressure against the bottom surface 135 and the conical Presses inner surface 128 of the threaded ring 111. Furthermore is the sealing washer 127 radially outwards against the joint 136 between the threaded ring 111 and the filter housing 110 pressed, so that here too a secure seal is achieved.

The melt flow in operation is as follows: The Melt passes from the melt channel 108 through the through hole 133 to the melt distributor 131, which the melt overflows and enters channels 137, of which only two are drawn. In the illustrated embodiment there are about 124 such channels. The melt flows then through the filter 138 which passes through the grating 139 completed at the bottom. In the filter housing 110 are channels 140 are also introduced (approx. 50 such channels are present), from where the melt enters the gap 121 arrives. Now the melt passes through the nozzle plate 109, namely through the holes 141, which are in capillaries in of the lower boundary surface 142 of the nozzle plate 109. Here the individual filaments emerge, which then close individual threads can be summarized.

Fig. 2 shows a similar spinning beam for melt spinning of polymers with a box-shaped or tubular, wedge-shaped at the bottom in the area of the nozzle packs tapered heating box 1, in which a heat transfer medium in Condense the vapor phase on the surfaces 2 to be heated can. Components are welded into the heating box Transport of the polymer melt from that ending at heating box 1 melt line coming from the extruder to the spinning pumps and from there to the bottom of the spinning beam usable spinneret packages. In this respect, this is Spinning beam in the technical article "Energy flows and energy saving potentials in the manufacture and processing of POY " (Author: Dr. Klaus Meier) in man-made fibers / textile industry from November 1993 also described. The content of the article is hereby incorporated into this description.

In the bar of Fig. 2 are 4 individual pump shafts Geared motors 3 driven spinning pumps 5 are provided, the geared motors are mounted on brackets 6, which limited at a short distance from said pump shafts 4 thermally conductive, but firmly connected to the heating box 1 are. Thus, the thermal expansion of the heating box 1 does not misalignment detrimental to the function of the drive the pump shafts 4. Special support structures for the Pump gear 3 and aligning the gear according to the There is no need to heat the spinning beam. In one execution of the spinning beam can spin pumps 5 from above into the Heating box to be installed (vertical pump shaft), at another from the side (horizontal pump shaft).

In contrast to the conventional solution is the one shown Execution no independent suspension for the Spinning pump drives 3 necessary. Such separate hangers have the disadvantage that when spinning considerable between the heater box and the engine mount There is a temperature gradient, which varies greatly Changes in the length of the box and the beam, which leads to misalignment. According to the present Solution, the carriers move and thus the motors with thermal expansion of the heating box with. This thermal expansion accordingly only causes one negligible small misalignment, the usual alignment of the pump drives if the spinning beam is heated up, this is not necessary. The meaning will be clear when it is mentioned that the heater box easily reaches a length of 6 m, and that add the changes in length of the individual positions would.

Each console is at a small (as small as possible) distance from the corresponding spinning pump drive shaft. The Connection of the console to the heating box is at least limited thermally conductive.

In the conventional system for heating the box heating steam processing at a central point for one Majority of spinning beams. This solution is efficient and inexpensive if the evaporation is considered alone.

The balance sheet changes, however, even if the distribution losses be considered. According to the now provided Solution, each spinneret is assigned its own evaporator.

The spinning beam 1 is therefore also in the insulation 7 of the Spin bar integrated evaporator 8 for the heat transfer medium assigned so that the connecting line 9 from the evaporator 8 reached a minimal length to the heating box 1. Consequently becomes the heat loss of the usual long steam pipe eliminated from central processing.

The figures show that the distance to be covered between the generator 8 and the box 1 very short and well insulated is. The heat losses are correspondingly small. This Heating box is therefore particularly advantageous when spinning of partially drawn yarns (POY) finer titer (textile yarns).

The components inside the heating box are:

A Rohrleitungasystem 10 (Fig. 4) with distributors 11, static Mixers 12 and freeze valves 13 (Fig. 3) for Interrupting the melt flow to the individual spinning pumps, so that a spinning pump can be replaced if necessary can without affecting the other spinning positions. This The pipe system distributes the one that leads to the heating box Melt onto the welded in the mentioned heating box Pump blocks 14 (Fig. 3). The pump blocks have one hand Attachment surfaces 15 (FIG. 3) for attaching spinning pumps 5 and on the other hand contact surfaces 132 for the bell-shaped Seals 127 of the spinneret packs, (see Fig. 1).

The mounting surfaces for the spinning pumps are on the floor of pot-like depressions 17 of the heating box. The wells 17 can e.g. arise from the the acreage forming part of the pump block 14 with a pipe section 18 is welded, which penetrates the heating box wall. The design of the pump block 14 enables Finishing the acreage 15 before welding the Pump block with the pipe section 18, which is the connection with the heater box wall. The melt channels 19 for Spinning pump and the channels 20 within the pump block too the nozzle packs are created by deep hole drilling. Every pump block 14 feeds four nozzle packages and accordingly comprises four channels 20, of which in the left block 14 in FIG. 3 one channel visible through the partial section and three through dashed lines have been indicated.

A so-called protective plate 21 (FIG. 3) is located between the mounting surface 15 and the actual spinning pump 5. Should the surface of the protective plate facing the spinning pump 21 accidentally damaged when replacing a spinning pump this protective plate 21 can be replaced, without reworking the pump block 14 becomes. You can continue with different protective panels 21 different with different arrangements of the melt channels Spinning pumps 5 are attached to the pump block 14.

If necessary, 21 holes for pressure sensors can be made in the protective plate 22 (Fig. 2) are attached. Aligned with the Bore axis or axes are protective tubes 23 in the heating box and the pipe section surrounding the spinning pump 5 18 welded, so that pressure sensors from the side screwed into the protective plate 21 or the pump block 14 can be.

The pump block (s) are made of stainless steel with the nozzle block (s) 24 made of heat-resistant Welded carbon steel. Each nozzle block has a number of pot-like bores 25, into which nozzle packs from below be used. These holes start from one flat, U-shaped depression 26 on the underside of the nozzle block out.

In the top of the nozzle block 24 is one over all pot-like bores 25 extending slot 28 milled so that these holes are cut from above. The associated pump block is then inserted into this slot 14 inserted and welded to the nozzle block.

The nozzle block 24 comprises an elongated support element (see in particular Fig. 3) that in the bottom part of the Heating box is welded. In the example shown includes this bottom part a frame 70, the following is described in more detail. In the nozzle block 24 are the pot-like Recordings 25 (see nozzle throat 105, Fig. 1) drilled, with a thin wall 72 remaining between them. The Nozzle throat 25 each take a nozzle package, e.g. according to Fig. 1 on.

In the U-shaped depression 26 are from below Longitudinal not shown locking strips used and screwed to the nozzle block 24. By means of this Strips and projections on the bottom of the nozzle plates are the nozzle packages in the manner of a bayonet lock by a 90 ° rotation with the nozzle block 24 connected. Due to the touching surfaces of the locking bars and the protrusions on the nozzle package are created a thermal bridge, which the nozzle package in the area of the nozzle plate supplies additional heat.

Inside the heating box, the nozzle block 24 has the U-shaped one Sink 26 adjacent, wing-like condensation surfaces 27 on the condensation heat on short Paths to the outside of the nozzle block 24, 26, to the locking bars and to the lower sides of the nozzle packs directs.

The space 40 is on the lowest surface 42 of the heater box via a drain pipe 44 (FIG. 2) with the steam generator 8 connected. The steam generator is accordingly below the upper end of tube 44, where it opens into the heating box. The steam inside the heater box condenses the surfaces of the heat sinks, and the condensate flows down into the "gutter" through the preheated room 40 is formed. The condensate 46 is collected in this channel and flows therefrom via pipe 44 to the producer 8 back. The cross-section of this channel is chosen so that the condensate level only rises so high in it can that the heat transfer to the bottom lot from Nozzle block 24 is not affected.

With an evaporation concept according to this invention can now both the steam supply and the condensate discharge through a single line is done (not shown). This (common) The line must have a sufficient cross-section so the steam in the upper part in the direction of the Heating box flows and the condensate on the bottom of the Line flows back into the evaporator.

The lower part of the box is the source of the largest Heat loss. By tapering the heater box side walls 54, 56 can insulating material 58 between these walls and an outer surface 60 are provided, which forms the upper end of the blow duct (not shown). Thereby can significantly reduce the heat loss of the heating box be what a corresponding load on the air conditioning avoids. The vertical walls 62, 64 of the upper section of the heating box produce enough space Amount of steam inside the box to ensure uniformity to ensure the temperature conditions in the heating box during spinning.

The transfer of heat to the lowest section of the Nozzle block 24, or the avoidance of heat loss from this section, is therefore in an embodiment according to Fig. 1 especially important because here the nozzle plate is spinning 109 (Fig. 1). The surface 48 (FIGS. 2 and 3) is therefore arranged accordingly, condensate in the collecting trough to guide, the bottom of this gutter from the depression 26 something is removed. To heat transfer out the saturated steam to the lowermost portion of the nozzle block 24 To improve, this is provided with a rib 27, which protrudes obliquely upwards from surface 48. The Rib has holes 52 in the lowest area to allow the drainage of the To allow condensate in the collecting trough. At this Rib 27, the aforementioned condensation surfaces are formed, which the function of the rib 27 as a heat absorption element enable. The ribs 27 extend from the cooler lower part of the unit in a room that is filled with steam, the steam around the rib neither the condensate is still adjacent to the channel bottom.

2 is particularly advantageous because the rib 27 is integrally formed with a profile can, which is mounted as a longitudinal part in the spinning beam and forms the aforementioned frame 70. There are for each nozzle package two thermal bridges through pads 124 and shoulders 123 of the bayonet catch (Fig. 1) formed, which the Nozzle pack is held in the throat. The shoulders 123 extend radially outwards from the lateral surface M of the Package and are diametrically opposed to each other. If that Package is installed, each shoulder bumps 123 against a respective stop surface (not shown). The Shoulders 123 or the abutment surfaces point towards the Longitudinal axis of the package (i.e. opposite to the spinning direction) such an angular position that as short as possible Heat flow paths between the thermal bridges and the fins 27 arise. In an embodiment according to Fig. 3 they are e.g. preferably in two rows parallel to the longitudinal axis of the frame arranged.

Each thermal bridge has a predetermined cross section. If there were no rib 27, this cross section would be just a relatively small condensation area in the lower one Edge section of the heating box has been assigned. Means the rib 27 can be the condensation surface assigned to the thermal bridge be significantly enlarged. This area is not just in the lower edge of the heating box either arranged because the rib differs from this lot extends obliquely upwards. The rib 27 is therefore an example a heat absorption element or heat conducting element, which has a condensation surface which in operation the Saturated steam is exposed, and heat from the saturated steam in the Heating box leads to the thermal bridge.

However, the invention is not restricted to this example. The heat absorption element is not necessarily in one piece formed with part of the heating box, but can be attached to it. The heat absorption element is also not necessarily formed as an elongated element that extends in the longitudinal direction of the spinning beam. It can e.g. Heat absorption elements are provided, each are assigned to a thermal bridge and which e.g. in radial arranged levels or arranged transversely to the longitudinal direction Levels. Examples are shown in FIGS. 5A and 5B are shown schematically and are described in more detail below.

The invention is particularly advantageous in a spinning beam, the thermal bridges in the lower margin of each throat has to transfer heat to the nozzle plate to improve. But she is also not on this version limited. It is e.g. known to be a thermal bridge between the heating box and the nozzle pack by means of a seal to provide the melt feed, i.e. at the top of the throat. Such a thermal bridge can also be provided if there is also a more direct thermal bridge to the nozzle plate is provided. On Heat absorption element to keep the heat flow to a thermal bridge to improve the seal, e.g. 6A and 6B.

5 and 6 are those Parts identical to parts according to Figures 2 to 4 are indicated with the same reference numerals. Such parts are not described again here. Instead of longitudinal ribs 27 according to FIG. 2, however, the frame 70A according to FIG. 5 has for everyone Nozzle block on six fins, each in two groups of three fins are arranged, the fins of one Group with the reference numeral 80 and those of the second Group with the reference numeral 82 in Fig. 5 are indicated. From Fig. 5B it can be seen that each fin is a thin plate is arranged in a substantially radial "plane". The "inner" edges of the fins 82 which are on the nozzle block 24 are attached around the corresponding end of one Grouped thermal bridge. The fins 80 of the other group are correspondingly opposite the end of the second thermal bridge arranged, i.e. the groups are each in the area of a heat group concentrated.

In the variant of Fig. 6 is the lower part of the nozzle block fastened in a frame 70 with ribs 27 according to FIG. 2. In addition, the upper part of each block is included eight fins 84 provided that the saturated steam in the middle of the Heated box are exposed and heat from this steam direct the nozzle block 24. Thus the heat transfer not just across the lower thermal bridges, but also improved over the upper thermal bridge (i.e. over the seal). The fins 84 can of course be extended downwards to form fins 80, 82 and the ribs 27 to replace. If the nozzle package has no thermal bridges in the lower part can of course fins or ribs only provided at the upper end of the nozzle block to heat transfer through the seal to each Improve case. Even if none in the lower part Fastening means for the nozzle package is provided, can but a thermal element between the package and his Carrier to improve heat transfer to the nozzle plate be provided.

The heat absorption elements (e.g. the ribs 27 or fins 80, 82, 84) should be made from a resilient and good thermally conductive material, preferably made of metal become. It is not just the material of the heat absorption element to pay attention, but to pair with the nozzle block so that the transfer of the recorded Heat at the nozzle block is achieved without interference or loss can be.

The heat absorption elements (like all other parts of a spinning beam) the safety regulations regarding Meet the pressure vessel. They are therefore preferably out Steel, e.g. Boiler plate or austenistic steel.

The rib 27 is preferably nowhere less than 5 mm thick, preferably about 10 mm or slightly more. The width of the Rib 27 (i.e. its dimension from the thermal bridge to the free-standing end) is preferably larger than 20 mm, e.g. 30 mm or something more.

Claims (11)

1. A spin-die manifold for the melt spinning of filaments with a heating box (1) in which a heat transfer medium in the vapour phase can condense on the surface areas (2) to be heated, characterized in that the profile of the heating box tapers downwardly or at the bottom in the zone of the spinneret plates or spinneret packages (109).
2. A spin-die manifold as claimed in claim 1, characterized in that the heat transfer medium vapour required for the operation of the spin-die manifold is produced in an evaporator (8) integrated in an insulation, so that the connecting line (9) from the evaporator to the heating box is short and the path between the evaporator (8) and the heating box (1) is well insulated.
3. A spin-die manifold as claimed in one of the preceding claims with throats (105) for exchangeable spinneret packages (109), with at least one heat bridge (123, 124) between the spin-die manifold and the spinneret package (109) received therein being produced in each receiver and the spin-die manifold comprising a heating box (100) which can be filled with a vapour-like heating medium in order to guide heat to the heat bridge, characterized in that the spin-die manifold is provided with a heat receiving element (27) which comprises a surface which is subjected to the heating medium during the operation, so that the element (27) conducts heat from the heating medium via said surface to the heat bridge (123, 124) and thus ensures that a temperature drop extends via the heat bridge in the direction away from the heating box.
4. A spin-die manifold as claimed in claim 3, characterized in that the element (27) is assigned to a plurality of throats (105).
5. A spin-die manifold as claimed in claim 4, characterized in that the element (27) is arranged integrally with a profile which is installed in the heating box (100).
6. A spin-die manifold as claimed in claim 3, characterized in that the element (27) is assigned to a single throat (105).
7. A spin-die manifold as claimed in one of the claims 3 to 6, characterized in that the element (27) is provided with a cross section which tapers in the direction away from the heat bridge.
8. A spin-die manifold as claimed in one of the claims 3 to 7, characterized in that means are provided for keeping away or discharging condensed heating medium from the heat bridge (123, 124).
9. A spin-die manifold as claimed in one of the claims 3 to 8, characterized in that the heat bridge (123, 124) is provided in the lowermost edge section of the throat and the element extends upwardly inclined from said section.
10. A spin-die manifold as claimed in one of the claims 4 to 9, characterized in that a heat bridge (123, 124) is provided in the vicinity of the melt supply and at least one element (27) is provided on the throat in the vicinity of the spinneret.
11. A spin-die manifold as claimed in one of the preceding claims, characterized in that in the case that the side walls (54, 56) taper insulating material (58) is provided between said walls and a jacket surface (60) at the upper end of a blow chute.

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