JP2017534774A - Melt spinning equipment - Google Patents

Abstract

The present invention relates to a melt spinning apparatus including a plurality of spinning nozzles held by a heated spinning beam. A cooling device having a cooling box whose height can be adjusted is disposed on the lower surface of the spinning beam. The cooling box has one or more inlet openings arranged corresponding to the spinning nozzles. In order to allow flexible adjustment of the transition zone with a shield between the spinning nozzle and the cooling box, a sleeve support is arranged between the cooling box and the spinning beam, the sleeve support Has one of a plurality of standing sleeves for each spinning nozzle. The sleeve is arranged corresponding to one or more inlet openings of the cooling box and enters the ring gap between the spinning nozzle and the spinning beam at the other free sleeve end located on the opposite side. ing.

Description

  The present invention relates to a melt spinning apparatus including a plurality of spinning nozzles, as described in the preceding stage of claim 1.

  A melt spinning device of this type is known on the basis of DE 10 2011 117 458 A1 (DE 10 2011 117458 A1).

  When manufacturing a synthetic filament yarn, usually, a plurality of yarns are pushed out from a plurality of spinning nozzles in parallel with each other within one spinning point. For this purpose, the spinning nozzle is held in a heated spinning beam at a distance from one another, and this spinning beam has a melt distribution system for supply to the spinning nozzle. This allows all parts leading to the melt and the spinning nozzle to be heated inside the spinning beam. For this purpose, the spinning nozzle is arranged in a recess in the lower side of the spinning beam. A cooling box is connected to the lower surface of the spinning beam, whereby the filament strands extruded from the spinning nozzle are cooled using a cooling air flow, and the filament strands are combined into one multifilament yarn after cooling. be able to.

  During the manufacture of certain yarn types, it has been found that delaying the cooling of the filament has a particularly positive effect on certain yarn properties. For this purpose, in the known melt spinning apparatus, a so-called post-heating device is arranged between the spinning beam and the cooling box, so that the filaments that have just been extruded first pass through an uncoolable transition zone.

  Such a non-coolable transition zone has been found to be an important parameter for optimizing yarn quality in the spinning process. At this time, there is a desire to be able to configure the transition zone as flexibly as possible, and in particular to be able to change the length of the shield between the spinning nozzle and the cooling device. The known melt spinning apparatus, however, requires a very laborious modification.

  However, in the known melt spinning apparatus according to WO 03/056074 (WO 03/056074 A1), the cooling device is formed by a cooling cylinder, which is connected to the spinning nozzle below the spinning beam. Directly corresponding arrangement. The spacer sleeve is threadedly coupled to the free end of the cooling cylinder at the end directed to the spinning nozzle, and the protruding sleeve end thus provides a cooling device between the spinning nozzle and the cooling cylinder. Determine the length of the shield not provided. Therefore, in order to adjust the shielding length, it is necessary to change the screwing length of the sleeve. As a result, when a plurality of spinning nozzles are present in the spinning beam, a troublesome remodeling process is required in order to be able to adjust the desired length of the shielding portion. In addition, the temperature near the spinning beam is extremely high, so manual remodeling requires special measures.

  Therefore, an object of the present invention is to improve a melt spinning apparatus having a plurality of spinning nozzles so that the transition zone provided between the spinning nozzle and the cooling apparatus can change its length easily and variably. Is to do.

  This problem is solved according to the invention by a melt spinning apparatus having the features of claim 1.

  Preferred embodiments of the invention are defined by the features and combinations of features described in the dependent claims.

  In the present invention, since the spinning nozzle used in the spinning beam requires regular maintenance such as shaving of the nozzle plate, the cooling device disposed under the spinning beam is configured to be adjustable in height. It is based on the recognition that it is. The present invention makes use of this height adjustability of the cooling device, in which a sleeve support is arranged under the spinning beam, which sleeve supports stand up for each spinning nozzle. One of them. The sleeve then extends between the spinning nozzle and the cooling device, which has one or more inlet openings as a cooling box. The sleeve ends of the sleeve located on the opposite side of the inlet opening then each enter the ring gap between one of the spinning nozzles and the spinning beam. A particular advantage of the present invention is that by means of the sleeve support, the shielding zone at each spinning nozzle can be moved simultaneously by the held sleeve.

  Depending on the properties of the sleeve in the sleeve support, two alternative embodiments for transition zone adjustability can be constructed. In the first variant, the sleeve support is held on the upper side of the cooling box together with a stationary standing sleeve, which adjusts the penetration depth of the free sleeve end into the spinning beam. In order to do so, it can be moved steplessly. To that end, the ring gap between the spinning nozzle and the spinning beam is dimensioned so that the free sleeve end can enter the spinning beam with a variable length.

  In a second alternative embodiment of the invention, the sleeves are each formed by a bellows between the sleeve ends, and the cooling box is moved steplessly to adjust the bellows length of the bellows. Is possible. Even in this case, the sleeve end can be similarly fixed in the ring gap between the spinning nozzle and the spinning beam. At this time, the change in length of the transition zone is realized simply by the bellows.

  In order to increase the flexibility of the melt spinning apparatus according to the invention, the sleeve support is further releasably coupled to the cooling box, the cooling box optionally comprising a sleeve support or the sleeve support. Without being able to be used on the underside of the spinning beam.

  Depending on the manufacturing process, the sleeve support can be configured in a wide variety of variations. For example, the sleeve support can be formed in a simple manner by the upper plate of the cooling box if the shielding zone is not heated. In this case, the sleeve can preferably be integrated in the cooling box.

  In order to achieve active heating of the transition zone, there is alternatively the possibility that the sleeve support is formed by a heating box and a sleeve made of a thermally conductive material, where the sleeve end of the sleeve is It can be heated by a heating medium held inside the heating box.

  As the heating medium, metal powder that can be heated by an electric heating rod inside the heating box or by a heat pipe system can be used.

  However, it is also possible for the heating medium to be formed by a heat transfer fluid, in which case the heating box is directly connected to the heat transfer fluid circuit.

  The heating of the sleeve can also be realized by arranging each one electric heating tape correspondingly around the sleeve.

  If a sleeve that is heated in the sleeve support is used, preferably a thermal insulation is placed between the sleeve support and the cooling box to avoid heat loss.

  In relation to each yarn count and the number of filaments, the cooling device can be configured as a so-called radial or cross-flow spray device. In order to generate a cooling air flow from radially outward to inward, in another embodiment of the present invention, the cooling box has a plurality of air permeable cooling cylinders, the cooling cylinders being The cooling cylinder is provided with a plurality of pipe pieces corresponding to the outlet side, and the pipe pieces are arranged inside the distribution chamber. And a plurality of outlet openings are formed below the cooling box. If comprised in this way, the powerful cooling by the cooling air flow produced from the radial direction outer side to the inner side through a cooling cylinder will be attained.

  At this time, the supply of cooling air is preferably guided through a distribution chamber connected to the blow chamber via a thin metal plate with holes.

  In order to form a cross-flow spray device, in another embodiment of the invention, the cooling box has a longitudinal cooling duct that forms an inlet opening, the cooling duct being blown on the side. It extends downward along the chamber and is connected to the blow chamber through the blow wall.

  Next, the present invention will be described in detail with respect to several embodiments of the melt spinning apparatus according to the present invention with reference to the accompanying drawings.

FIG. 1.1 and FIG. 1.2 are views respectively showing a first embodiment of the melt spinning apparatus. FIG. 2.1 and FIG. 2.2 are diagrams respectively showing another embodiment of the melt spinning apparatus according to the present invention. It is a cross-sectional view schematically showing another embodiment of the melt spinning apparatus. It is a cross-sectional view schematically showing another embodiment of the melt spinning apparatus according to the present invention. It is a cross-sectional view schematically showing another embodiment of the melt spinning apparatus.

  1.1 and 1.2 show a first embodiment of a melt spinning apparatus in a plurality of drawings. FIG. 1.1 schematically shows a longitudinal sectional view, and FIG. 1.2 schematically shows a transverse sectional view. Thus, unless one of the drawings is explicitly associated, the following description is for both drawings.

  The melt spinning apparatus has a spinning beam 1, which is shown only in the lower half in FIGS. 1.1 and 1.2. The spinning beam 1 is configured to be heatable. The spinning beam 1 has a plurality of recesses 5.1, 5.2, and 5.3 on the lower surface 3, and these recesses 5.1, 5.2, and 5.3 are formed inside the spinning beam 1. In FIG. 1, one spinning nozzle connection part 4.1, 4.2, 4.3 is formed. The spinning nozzle connections 4.1, 4.2, and 4.3 hold one spinning nozzle 2.1, 2.2, and 2.3, respectively. As usual, the spinning nozzles 2.1, 2.2, 2.3 are configured as so-called spinning nozzle units, and are fixed to the spinning nozzle connection parts 4.1, 4.2, 4.3 by screwing. be able to. The diameters of the recesses 5.1, 5.2, 5.3 are formed larger than the diameters of the spinning nozzles 2.1, 2.2, 2.3, so that the recesses 5.1, 5.2, respectively. Ring gaps 6.1, 6.2, and 6.3 are formed between 5.3 and the spinning nozzles 2.1, 2.2, and 2.3.

  The spinning beam 1 further comprises a melt distribution system, not shown here, which comprises a spinning nozzle 2.1, 2.2, 2.3 with a multi-spinning pump (Mehrfachspinnpumpe). Connected to. This spinning pump, not shown here, is also held by the spinning beam 1 in the same manner.

  Below the spinning beam 1, a cooling device 12 is arranged, and this cooling device 12 has a cooling box 13 whose height can be adjusted. In this embodiment, the cooling box 13 is formed as a radial spray device. For this purpose, the cooling box 13 has an upper blow chamber 14 and a lower distribution chamber 17. A plurality of cooling cylinders 16.1, 16.2, 16.3 are arranged in the upper blow chamber 14, and each of these cooling cylinders 16.1, 16.2, 16.3 is 1 in each. Two inlet openings 15.1, 15.2, 15.3 are formed. The inlet openings 15.1 to 15.3 and the cooling cylinders 16.1 to 16.3 are held coaxially with respect to the spinning nozzles 2.1, 2.2 and 2.3, so that the spinning nozzle 2. The filament bundles formed respectively by 1 to 2.3 can run into the cooling box 13 via the inlet openings 15.1 to 15.3.

  The cooling cylinders 16.1 to 16.3 are open to a plurality of pipe pieces 18.1, 18.2, 18.3, these pipe pieces 18.1, 18.2, 18.3 It is arranged in the distribution chamber 17 on the side. The pipe pieces 18.1 to 18.3 form one outlet opening 21.1, 21.2, 21.3 on the lower surface of the cooling box 13, respectively. The distribution chamber 17 is connected via an air connection 19 to a cooling air source not shown here. Inside the distribution chamber 17, the inflowing cooling air can be guided to the upper blow chamber 14 through the metal thin plate 20 with holes. Since the cooling cylinders 16.1 to 16.3 arranged inside the blow chamber 14 have gas permeable walls, the cooling air flowing into the blow chamber 14 is cooled by the cooling cylinders 16.1 to 16.1. The filament strand guided through the cooling box 13 flows through the cooling box 13 from 16.3 toward the inside in the radial direction. The tube pieces 18.1 to 18.3 arranged in the distribution chamber 17 each have one closed cylindrical wall.

  A sleeve support 10 is arranged between the cooling box 13 and the spinning beam 1. The sleeve support 10 has a plurality of sleeves 8.1, 8.2, and 8.3 that stand immovably. These sleeves 8.1, 8.2, and 8.3 Sleeve ends 7.1, 7.2, 7.3 are arranged corresponding to the inlet openings 15.1, 15.2, 15.3 and the upper sleeve ends 9.1, 9.2, 9 .3 enters the recesses 5.1, 5.2 and 5.3 of the spinning beam 1. The sleeve ends 9.1, 9.2, and 9.3 of the sleeves 8.1, 8.2, and 8.3 have sleeve ends 9.1 to 9.3 having ring gaps 6.1, 6.2, and 6.2, respectively. Dimensioned to enter 6.3. Thereby, the sleeves 8.1 to 8.3 form a transition zone between the spinning nozzles 2.1 to 2.3 and the cooling device 12, in which the filaments are not actively cooled.

  In the present embodiment, the sleeve support 10 is formed by a plate 11, and the plate 11 is fixed to the upper side surface of the cooling box 13. In this way, the sleeve support 10 and the cooling box 13 form a structural unit whose height can be adjusted relative to the spinning beam 1. The height adjustment device of the cooling box 13 is not shown in detail here. Such height adjustment can preferably be carried out via pneumatic or hydraulic control units, which control unit 13 can then have a cooling box 13 and thus a sleeve end 9.1, 9.2. 9.3 can be held at an arbitrary position relative to the spinning beam 1. Thereby, the length of the shielding zone generated between the spinning nozzles 2.1 to 2.3 and the cooling box 13 can be adjusted steplessly by the sleeves 8.1 to 8.3.

  The number of spinning nozzles on the lower side of the spinning beam 1 shown in FIGS. 1.1 and 1.2 is an example. Basically, a plurality of spinning nozzles can be held on the underside of the spinning beam in a single row or in multiple rows.

  FIGS. 2.1 and 2.2 show another embodiment of the melt spinning apparatus according to the present invention. This embodiment is shown schematically in longitudinal section in FIG. 2.1 and schematically in transverse section in FIG. 2.2. Thus, unless one of the drawings is explicitly associated, the following description is for both drawings.

  Since the spinning beam 1 is constructed in the same way as the embodiment shown in FIGS. 1.1 and 1.2, reference is made here to the description already given and further explanation is omitted to avoid repetition. .

  Under the spinning beam 1, a cooling device 12 is configured as a cross-flow spraying device. For this purpose, the cooling box 13 has an elongated cooling duct 26 which forms an inlet opening 15 which extends over the spinning nozzles 2.1 to 2.3. Yes.

  As can be seen in particular in the illustration in FIG. 2.2, the cooling duct extends downward along the blow chamber 14 and is connected to the cooling duct 26 via a blow wall 27. . The cooling duct is opened downward and forms an outlet opening 21.

  The blow chamber 28 placed on the side by the cooling duct 26 is connected via an air connection 19 to a cooling air source not shown here.

  A sleeve support 10 formed as a heating box 22 is disposed on the upper side surface of the cooling box 13. The heating box 22 is pierced by sleeve ends 7.1 to 7.3 of the sleeves 8.1 to 8.3, and these sleeve ends 7.1 to 7.3 are inlets on the upper side of the cooling box 13. It is arranged corresponding to the opening 15. The sleeve ends 9.1 to 9.3 located on the opposite side of the sleeves 8.1 to 8.3 made of thermally conductive material enter the ring gap 6.1 to 6.3. Yes. The function for shielding and forming the transition zone is now the same as the embodiment shown in FIGS. 1.1 and 1.2. In the embodiment shown in FIGS. 2.1 and 2.2, the sleeves 8.1 to 8.3 are heated by the heating box 22. The heating box 22 is connected to a heat transfer fluid circuit (not shown) via a supply path 23 and a discharge path 24, so that the sleeves 8.1 to 8.3 are formed inside the heating box 22. Heat transfer fluid flows around the sleeve ends 7.1-7.3, thereby heating the sleeves 8.1-8.3. In order to avoid heat loss, a heat insulating material 25 is disposed between the heating box 22 and the cooling box 13.

  The embodiment of the melt spinning apparatus shown in FIGS. 2.1 and 2.2 therefore also reduces the length of the transition zone between the spinning nozzles 2.1 to 2.3 and the cooling box 13 as well. Can be adjusted to the formula. The length of the transition zone between the spinning beam 1 and the cooling device 12 is adjusted in accordance with the adjustment of the penetration depth of the sleeve ends 9.1 to 9.3. This can form a variable transition zone for slow cooling of the filament strands after extrusion.

  Similarly, in the variation of the melt spinning apparatus according to the present invention shown in FIGS. 2.1 and 2.2, the sleeve support 10 can be detached from the cooling device 12 together with the sleeves 8.1 to 8.3. Therefore, the cooling device 12 can be held directly on the lower surface 3 of the spinning beam 1 together with the cooling box 13 and the heat insulating material 25. In this way, yarn production can be realized without additional shielding.

  In FIG. 3, another embodiment of the melt spinning apparatus is schematically shown in cross-section. In the embodiment shown in FIG. 3, only a spinning beam 1 with a sleeve support 10 and one of the sleeves 8.1 is shown. The cooling device 12 located under the sleeve support 10 is not shown. This is because the variation shown in FIG. 3 can be selectively combined with the embodiment shown in FIG. 1.1 or the embodiment shown in FIG.

  In the embodiment shown in FIG. 3, the sleeve 8.1 is formed by a bellows 29. The bellows 29 extends between the sleeve end 7.1 and the sleeve end 9.1. The sleeve end 9.1 is fixed in the ring gap 6. The sleeve end 7.1 located on the opposite side is likewise fixed to the sleeve support 10.

  In order to adjust the length of the shield between the spinning nozzle 2.1 and the sleeve support 10, the sleeve support can be adjusted in height so that the bellows 29 can be adjusted according to the direction of adjustment. And stretched. Thus, the length change can be realized only by the bellows 29. The bellows 29 is preferably manufactured from a wire cloth having thermal conductivity properties. Therefore, the embodiment shown in FIG. 3 can be configured to be heatable.

  FIG. 4 shows another embodiment of the sleeve support 10, which can be used, for example, in the melt spinning apparatus shown in FIG. 1.1 or FIG. The embodiment shown in FIG. 4 is substantially the same as the embodiment shown in FIG. The sleeve support 10 is again formed by a heating box 22. The heating box is penetrated by sleeve ends 7.1 to 7.3, only the sleeve end 7.1 of the sleeve 8.1 is shown in FIG. Inside the heating box 22, a metal powder 30 heated by two electric heating type heating rods 31 is arranged. The heating rod 31 extends substantially over the entire length of the spinning beam 1. Thus, the sleeves 8.1 to 8.3 coupled to the heating box 22 can be heated.

  In the embodiment shown in FIG. 4, a heat pipe system can be used instead of the heating rod 31. Therefore, the metal powder 30 inside the heating box 22 is heated by each one heating tube.

  For the case where the sleeve support 10 is formed as a plate 11, as shown in the embodiment shown in FIGS. 1.1 and 1.2, the heating of the sleeves 8.1 to 8.3 is performed. Can be performed directly by an electric heating tape. To that end, FIG. 5 shows another embodiment of a possible transition zone between the spinning beam 1 and the cooling device 12 (not shown in detail). The sleeve support 10 is formed as a plate 11 and supports the sleeves 8.1 to 8.3 (only the sleeve 8.1 is shown in FIG. 5) which is held upright. A heating tape 32 is correspondingly disposed in the immediate vicinity of the sleeve end 7.1 held by the sleeve support 10, and this heating tape 32 is held around the sleeve 8.1. The sleeves 8.2, 8.3 not shown here likewise have an electrical heating tape 32, so that each transition zone can be configured with a heated sleeve.

  The embodiments shown in the drawings are merely a few so that the height-adjustable sleeve support 10 can be used to simultaneously and in parallel adjust a plurality of sleeves arranged corresponding to the spinning nozzles. It just shows the possibility of such configuration. What is important at this time is that the cooling device 12 and the sleeve support 10 are used to adjust the desired length of the transition zone for the purpose of shielding the influence of cooling air that may be generated immediately below the spinning nozzle. Is to work together.

Claims (13)

A plurality of spinning nozzles (2.1, 2.2) held by a heatable spinning beam (1), and a cooling box (13) whose height is adjustable on the lower surface (3) of the spinning beam (1). And the cooling box (13) has one or more inlet openings (15, 15..) Arranged corresponding to the spinning nozzles (2.1, 2.2). 1, 15.2), a melt spinning apparatus,
A sleeve support (10) is disposed between the cooling box (13) and the spinning beam (1), and the sleeve support (10) is connected to the spinning nozzle (2.1, 2.2). ) Each having one of a plurality of standing sleeves (8.1, 8.2), the sleeve (8.1, 8.2) having one sleeve end (7.1, 7.2) are arranged corresponding to the one or more inlet openings (15, 15.1, 15.2) of the cooling box (13), and the sleeve (8.1, 8.2) Are the ring gaps between the spinning nozzle (2.1, 2.2) and the spinning beam (1) at the free sleeve ends (9.1, 9.2) located on the opposite side, respectively. 6.1, 6.2) The melt spinning apparatus characterized by having entered.   The sleeve support (10) is held on the upper surface of the cooling box (13) together with the sleeve (8.1, 8.2) standing upright, and the cooling box (13) 2. The melt spinning device according to claim 1, wherein said melt spinning device is movable steplessly to adjust the depth of penetration of said free sleeve end (9.1, 9.2) into the spinning beam (1). .   The sleeves (8.1, 8.2) are formed by bellows (29) between the sleeve ends (7.1, 7.2, 9.1, 9.2), respectively, The melt spinning apparatus according to claim 1, wherein the box (13) is movable steplessly to adjust the bellows length of the bellows (29).   The sleeve support (10) is releasably coupled to the cooling box (13), and the cooling box (13) optionally comprises the sleeve support (10) or the sleeve support. The melt spinning apparatus according to any one of claims 1 to 3, which can be used on the lower surface (3) of the spinning beam (1) without (10).   The melt spinning apparatus according to any one of claims 1 to 4, wherein the sleeve support (10) is formed by an upper plate (11) of the cooling box (13).   The sleeve support (10) is formed by a heating box (22) and the sleeve (8.1, 8.2) made of a heat conductive material, and the sleeve (8.1, 8.2). 5. The melt according to claim 1, wherein the sleeve end (7.1, 7.2) is heatable by a heating medium held inside the heating box (22). Spinning device.   The melt spinning apparatus according to claim 6, wherein the heating medium is a metal powder (30) that can be heated by an electric heating rod (31) or by a heat pipe system.   The melt spinning apparatus according to claim 6, wherein the heating medium is formed by a heat transfer fluid, and the heating box (22) is connected to a heat transfer fluid circuit.   6. The melt spinning apparatus according to claim 1, wherein the sleeve (8.1, 8.2) is heatable around each sleeve by a single electric heating tape (32). 7.   The melt spinning apparatus according to any one of claims 6 to 9, wherein a heat insulating material (25) is arranged between the sleeve support (10) and the cooling box (13).   The cooling box (13) has a plurality of air permeable cooling cylinders (16.1, 16.2), and the cooling cylinders (16.1, 16.2) have an upper blow chamber ( 14) and forming the inlet opening (15.1, 15.2), the cooling cylinder (16.1, 16.2) has a plurality of pipe pieces ( 18.1, 18.2) are arranged correspondingly, the pipe pieces (18.1, 18.2) are arranged inside the distribution chamber (17) and have a plurality of outlet openings (21. 1. The melt spinning apparatus according to claim 1, wherein 1, 2 1.2) is formed on a lower surface of the cooling box (13).   A perforated metal sheet (20) is disposed between the blow chamber (14) and the distribution chamber (17), the distribution chamber (17) being connected to a cooling air source. 11. The melt spinning apparatus according to 11.   The cooling box (13) has an elongate cooling duct (26) that forms the inlet opening (15), and the cooling duct (26) is connected to a blow chamber (28) disposed on the side. 11. The melt spinning apparatus according to claim 1, wherein the melt spinning apparatus extends downward along the wall and is connected to the blow chamber (28) through a blow wall (27).

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