EP3538697B1 - Cooling apparatus for a synthetic thread - Google Patents
Cooling apparatus for a synthetic thread Download PDFInfo
- Publication number
- EP3538697B1 EP3538697B1 EP17793961.8A EP17793961A EP3538697B1 EP 3538697 B1 EP3538697 B1 EP 3538697B1 EP 17793961 A EP17793961 A EP 17793961A EP 3538697 B1 EP3538697 B1 EP 3538697B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- groove
- cooling
- thread
- base
- cross
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000001816 cooling Methods 0.000 title claims description 203
- 239000000110 cooling liquid Substances 0.000 claims description 37
- 239000000919 ceramic Substances 0.000 claims description 35
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims 1
- 238000003780 insertion Methods 0.000 description 7
- 230000037431 insertion Effects 0.000 description 7
- 239000003570 air Substances 0.000 description 6
- 238000011161 development Methods 0.000 description 6
- 230000018109 developmental process Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 238000009736 wetting Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002347 wear-protection layer Substances 0.000 description 1
Images
Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/003—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one stationary surface, e.g. a plate
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/008—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass with elimination of fumes
Definitions
- the invention relates to a cooling device for a synthetic thread, in particular a twisted thread within a texturing zone according to the preamble of claim 1.
- cooling devices are usually used, which are designed as a curved cooling rail.
- the largest possible radii of curvature are used on the cooling rail in order to keep the contact friction between the twisted thread and the surface of the cooling rail low.
- Such cooling rails only use the ambient air to cool the thread. Therefore required
- Such cooling devices have relatively long cooling sections, which usually lead to a multi-level construction of the texturing machine.
- cooling devices are also known in which the cooling of the thread is intensified with the aid of a cooling liquid.
- a generic cooling device is for example from EP 0 403 098 A2 known.
- the twisted thread is guided within the texturing zone through a cooling groove on the surface of a cooling body, which holds a cooling liquid in the groove base to wet the thread.
- the wetting on the thread promotes the frictional behavior of the thread between the thread and the contact bar, so that a transfer of twist is promoted.
- penetration of the cooling liquid into the thread is problematic.
- the false twist creates a dynamic of its own on the thread and makes it difficult for cooling liquid to adhere to the thread, which is only carried along by the thread and thrown off by the thread when it leaves the cooling groove.
- insufficient cooling is achieved inside, so that in the known cooling device the yarn is then guided over a cooling rail for residual cooling.
- EP312322 A1 describes a device for cooling a heated thread with a heat sink.
- the heat sink has an elongated cooling groove for guiding the thread, which is connected to a dosing device for supplying a cooling liquid via a dosing opening in the groove base.
- the cooling groove has several guide sections with a corrugated groove base and at least one guide section with a smooth groove base, which are formed alternately one behind the other.
- the metering opening is arranged in front of one of the guide sections with a corrugated groove base in an inlet area of the cooling groove.
- EP3312321 Al describes a cooling device for a synthetic thread, in particular a twisted thread within a texturing zone, which has an elongated cooling body with an open cooling groove for guiding the thread.
- the cooling groove is connected to a metering device for supplying a cooling liquid via a metering opening.
- the heat sink has at least one ceramic insert at a thread inlet, which forms a corrugated groove base within the cooling groove and on the surface of which the thread can be guided with contact, the metering opening being Ceramic insert is assigned.
- the cooling liquid can thus be continuously fed to the thread over a longer distance.
- WO2018 / 059743 A1 describes a method and a cooling device for cooling a synthetic thread within a texturing zone of a texturing machine.
- a cooling liquid is introduced into a cooling groove of a cooling body, which is distributed in the groove base of the cooling groove.
- the heated thread is guided through the cooling groove with contact.
- the cooling liquid is fed through a metering opening in the groove base of the cooling groove depending on a thread denier of the thread, the delivery rate of cooling liquid being generated by a controllable metering means.
- WO2018 / 065123 A1 describes a device for cooling a heated thread, wherein the thread can be guided in the groove base of an elongated cooling groove of a cooling body.
- the cooling groove is connected to a dosing device for supplying a cooling liquid via a dosing opening in the groove base.
- the heat sink is encapsulated in a housing and the housing has a threading slot for inserting the thread, which threading slot extends between a thread inlet and a thread outlet on the housing.
- WO2017 / 089191 A1 describes a false twist texturing device for crimping synthetic yarn.
- the false twist texturing device has a first delivery mechanism for pulling the thread from a supply bobbin, a heating device for heating the thread, a cooling device for cooling the thread, a false twist unit for false twisting of the thread and a second delivery mechanism for stretching the thread.
- the cooling surface of the cooling device is formed in a longitudinal groove, a groove base of the longitudinal groove having a plurality of guide webs with fluid pockets in between.
- DE 10 2011 018179 A1 describes a device for applying a fluid to a running multifilament thread, in which a guide groove for receiving the thread is formed on a guide body.
- the guide body is held on a holder which has an integrated fluid connection.
- the fluid connection is connected to a groove base of the guide groove via a nozzle bore, the nozzle bore opening into an inlet zone of the guide groove.
- the inlet zone is followed by a wetting zone which has several groove pockets in the groove base, by means of which the groove base is divided into contact areas and non-contact areas.
- the contact surfaces in the groove base together form a surface portion of the according to the invention Groove base in the range from 10 to 40%.
- the contact surfaces form a radius of curvature in the longitudinal direction.
- Another aim of the invention is to use up the cooling liquid introduced into the cooling groove to cool the thread as much as possible.
- the cooling groove has a groove cross-section subdivided into several partial cross-sections, in which the groove walls in at least one of the partial cross-sections (guide cross-section) are parallel to one another or each inclined with an opening angle of less than 15 °.
- the invention is based on the knowledge that the inherent dynamics of the thread caused by the false twist hinders the application of the cooling liquid or the action of the cooling liquid. Part of the cooling liquid is thrown off the thread. Furthermore, the inherent dynamics of the thread, which are mainly noticeable through twists, lead to a transverse evasive movement. There is the possibility that the twisted thread moves up the groove flanks of the cooling groove and leaves the groove base.
- the cooling groove has a groove cross-section subdivided into several partial cross-sections, the groove walls in at least one of the partial cross-sections being designed parallel to one another or each inclined with an opening angle of less than 15 °. In this way, relatively steep groove flanks can be used within the cooling groove in order to prevent cooling liquid from being thrown out. Furthermore, despite its own dynamics, the thread remains within the cooling groove on the groove base.
- the groove flanks each having a larger opening angle are designed to be inclined with respect to the groove flanks of the guide section. This realizes a relatively narrow guide area at the bottom of the cooling groove, in which the thread is guided with contact and comes into contact with the cooling liquid.
- the development of the invention is particularly advantageous in which one of the partial cross-sections (insertion cross-section) forms one end of the groove flanks, the groove flanks of the insertion cross-section each being inclined with a larger opening angle compared to the groove flanks of the basic cross-section are executed.
- a funnel-shaped opening of the cooling groove can thus be implemented in order to be able to insert the thread in a simple manner at the start of the process.
- the further development of the invention has proven particularly useful, in which the basic cross-section and the guide cross-section of the cooling groove together form a partial groove depth of the cooling groove that is greater than 50% of a total groove depth of the cooling groove.
- the twisted thread can thus be guided safely in the groove base of the cooling groove, with intensive consumption of the cooling liquid for cooling the thread being possible.
- the development of the invention is preferably carried out in which the groove base of the cooling groove has several alternating longitudinal sections in the direction of the thread running direction, one of the longitudinal sections forming a corrugated groove base with a plurality of guide webs and another of the longitudinal sections being one Forms smooth groove bottom formed in the groove depth.
- the corrugated groove bottom of one of the longitudinal sections can avoid a continuous dragging of the cooling liquid supplied to the thread.
- the corrugation in the groove base is suitable for wiping off the non-evaporated cooling liquid residues adhering to the thread and for keeping them in the cooling groove. In this way, the thread can be evenly wetted over a longer distance, so that the cooling effects generated are intensified.
- At least one longitudinal section with a smooth groove base is provided, in which the thread is cooled by the previously supplied cooling liquid.
- the longitudinal sections with the smooth groove base have a greater groove depth. The thread can thus only be guided with contact on the guide webs, so that the alternately arranged longitudinal sections in the cooling groove guide the thread alternately with and without contact.
- the length of the cooling groove is generally chosen as a function of the thread to be cooled and its thread denier. Threads with relatively large denier require relatively long cooling grooves.
- the further development of the invention is preferably carried out in which the longitudinal sections with a corrugated groove base and the longitudinal sections with a smooth groove base each extend over a partial length of the cooling groove in the range from 10 mm to 40 mm .
- the development of the invention is preferably carried out in which the heat sink is at a thread inlet the cooling groove has at least one ceramic insert which forms one of the longitudinal sections with a corrugated groove base within the cooling groove.
- the thread can thus be guided over a plurality of support points which, despite intensive contact, limit the friction on the thread and do not lead to any obstruction of twist.
- the cooling liquid is preferably supplied in an inlet zone of the groove base, which is arranged upstream of the corrugated groove base on the ceramic insert.
- the metering opening ends in the inlet zone through which the thread with contact or preferably without contact. This enables a continuous and metered supply of the cooling liquid into the cooling groove.
- the heat sink has at least one further ceramic insert with a corrugated groove base at a thread outlet of the cooling groove, the cooling groove having at least one of the longitudinal sections with the smooth groove base between the ceramic inserts.
- the thread can also be guided in the cooling groove at the thread outlet with sufficient thread contact, without inadmissibly high thread friction occurring.
- the groove base of the cooling groove on the heat sink is preferably designed in such a way that the thread can be guided in the thread running direction on a guide track with a radius in the range from 300 mm to 1000 mm. This means that very compact texturing zones can be implemented within texturing machines.
- the heat sink can be made in several parts or in one part to form the cooling groove.
- the cooling body is preferably formed by a cooling rail which is held within a housing between a thread inlet and a thread outlet. In this way, all vapors that occur can be intercepted in isolation from an environment.
- the device according to the invention is therefore particularly suitable for use in texturing machines with a large number of processing points.
- FIG. 1 a first embodiment of the cooling device according to the invention is shown schematically in several views.
- Figure 1 shows the embodiment in a longitudinal sectional view and in FIG Figure 2 a cross-sectional view of the embodiment is shown.
- FIG Figure 2 shows a cross-sectional view of the embodiment.
- the exemplary embodiment has an elongated heat sink 1.
- An open cooling groove 2 extends on a guide side of the cooling body 1.
- the cooling groove 2 extends to the front ends of the cooling body 1.
- the cooling groove 2 thus forms a thread inlet 13 at the front ends and a thread outlet 14 at the opposite front end, as in FIG Fig. 1 shown.
- the cooling groove 2 has several Longitudinal sections 6.1 with a corrugated groove base 4.1 and several longitudinal sections 6.2 with a smooth groove base 4.2.
- the longitudinal sections 6.1 and 6.2 are alternately formed in the cooling groove 2 in the thread running direction.
- a first longitudinal section 6.1 with the corrugated groove base 4.1 is assigned to the thread inlet 13.
- the corrugated groove base 4.1 of the first longitudinal section 6.1 is preceded by an inlet zone 11 into which a metering opening 3 opens.
- the metering opening 3 is connected to a fluid line 5.1 via a metering channel 3.1 inside the cooling body 1.
- the fluid line 5.1 is coupled to a metering device 5 which has a metering means 5.2 and a container 5.3.
- the dosing means 5.2 is preferably designed as a dosing pump, a cooling liquid being held in the container 5.3.
- the Figure 2 shows a cross section of the cooling groove 2 in the area of the length section 6.1 with the corrugated groove base 4.1.
- the corrugated groove base 4.1 is formed here by a plurality of guide webs 8 and a plurality of grooves 9, which run essentially transversely to the cooling groove 2.
- the groove depth of the guide webs 8 is in Figure 2 with the reference symbol t 1 and the groove depth of the grooves 9 with the reference symbol t 2.
- the groove cross-section of the cooling groove 2 is divided into several partial cross-sections 7.1, 7.2 and 7.3.
- the partial cross-sections 7.1, 7.2 and 7.3 of the cooling groove 2 are formed in this embodiment by a basic cross-section 7.3 forming the groove bottom 4.1, a central guide cross-section 7.2 and an upper insertion cross-section 7.1.
- the groove flanks point in each of the partial cross-sections 7.1 to 7.3 10.1 and 10.2 have different layers.
- the groove flanks 10.1 and 10.2 are formed parallel to one another in the region of the guide cross section 7.2, so that a guide slot is formed within the cooling groove 2.
- the groove flanks 10.1 and 10.2 each have an opening angle ⁇ 1 in the area of the base cross section 7.3.
- the opening angles ⁇ 1 on the groove flanks 10.1 and 10.2 are identical.
- the groove flanks 10.1 and 10.2 are inclined in the region of the insertion cross-section 7.1 with a larger opening angle ⁇ 3 in such a way that the insertion cross-section 7.1 leads to a funnel-shaped opening of the cooling groove 2.
- the opening angle ⁇ 3 in the area of the insertion cross-section 7.1 is thus greater than the opening angle ⁇ 1 in the area of the basic cross-section 7.3.
- the guide cross section 7.2 and the basic cross section 7.3 of the cooling groove 2 form a partial groove depth t F.
- the partial groove depth t F of the cooling groove is greater than 50% of the total groove depth t 1 in the area of the corrugated groove base 4.1.
- the longitudinal sections 6.2 with a smooth groove base 4.2 have a greater groove depth in relation to the longitudinal sections 6.1 with the corrugated groove base 4.1.
- the groove depth of the groove base 4.2 is selected such that a thread is only guided with contact on the corrugated groove base 4.1.
- the groove bottoms 4.1 of the length sections 6.1 are arranged in the cooling groove 2 with respect to one another in such a way that a thread on a guide track with a radius in the range of 300 mm to 1000 mm can be guided.
- the radius of curvature of the groove bottoms 4.1 is in Figure 1 with the reference character R. Reliable thread guidance is thus achieved between the thread inlet 13 and the thread outlet 14.
- the thread is guided with contact only in the longitudinal sections 6.1 with the corrugated groove base 4.1.
- the thread is guided without contact. This results in 2 contact zones and not contact zones in the thread guide within the cooling groove.
- the longitudinal section 6.1 has a length L 1 which, depending on the yarn denier, has a range from 10 mm to 40 mm.
- the length L 1 of the longitudinal section 6.1 is in Figure 1 shown.
- the longitudinal section 6.2 also extends over a length of the cooling groove 2, which has an equal or unequal length depending on the thread denier.
- the length is in Figure 1 with the reference character L 2 and is in the range from 10 mm to 40 mm.
- the cooling groove 2 there follows a contact zone with the corrugated groove base 4.1 and a non-contact zone with the smooth groove base 4.2 and another longitudinal section 6.1 associated with the thread outlet 14 with a corrugated groove base 4.1.
- the middle longitudinal section 6.1 with the corrugated groove bottom 4.1 on the one hand removes the excess cooling liquid from the thread and at the same time leads to an equalization of the wetting in order to obtain further cooling.
- the thread is guided out of the cooling groove 2 essentially without adhering excess cooling liquid.
- the cooling groove 2 has a groove depth t 1 in the range from 4 to 10 mm.
- the width of the cooling groove 2, in particular in the area of the guide cross-section 7.2, is a few millimeters in order to prevent cooling liquid from being thrown out and the thread from emerging.
- the width of the cooling groove is preferably 0.5 mm to 4 mm.
- the illustrated embodiment of the cooling device according to the invention extends the groove cross-section of the cooling groove 2 essentially over the entire length of the cooling groove 2. In principle, however, there is also the possibility of varying the groove cross-section over the length of the cooling groove 2.
- FIG. 2 shown groove cross-section of the cooling groove as an example.
- Figure 3 Another exemplary embodiment of a cooling device is shown in which the groove cross section of the cooling groove 2 does not have any parallel groove flanks 10.1 and 10.2 in the area of the guide cross section 7.2.
- the embodiment according to Figure 3 is essentially identical to the exemplary embodiment according to FIG Figure 1 and 2 so that at this Place only the cross section is shown. To avoid repetition, only the difference in the groove cross-sections is explained.
- the groove cross section of the cooling groove 2 of the embodiment according to Figure 3 has slightly inclined groove flanks 10.1 and 10.2 in the area of the central guide cross-section 7.2.
- the groove flanks 10.1 and 10.2 are designed to be inclined by an opening angle ⁇ 2 in the region of the guide cross section 7.2.
- the opening angle ⁇ 2 is limited, however, in order to obtain the steepest possible wall of the groove flanks 4.1 and 4.2.
- the opening angle ⁇ 2 is preferably below 15 °.
- the following size ratio results in the execution of the opening angles ⁇ 1 , ⁇ 2 and ⁇ 3 .
- the guide cross-section 7.2 and the basic cross-section 7.1 of the cooling groove 2 have a sufficient partial groove depth t F , in particular to avoid cooling liquid being thrown out.
- the longitudinal sections 6.1 with the corrugated groove base 4.1 are integrated directly into the groove base of the cooling body 1.
- the cooling groove 2 in the groove base 4.1 preferably has a wear protection layer in order to be able to guide the thread with contact.
- Figure 4 and 5 another embodiment of the Shown cooling device according to the invention.
- Figure 4 shows here schematically a longitudinal sectional view and in Figure 5 a cross-sectional view of the cooling groove is shown.
- the further exemplary embodiment of the cooling device according to the invention likewise has an elongate cooling body 1.
- An open cooling groove 2 extends on an upper side of the cooling body 1.
- the cooling groove 2 extends between a thread inlet 13 and a thread outlet 14, which are formed on the front ends of the cooling body 1.
- a ceramic insert 12.1 is held on the heat sink 1 in the cooling groove 2 at the thread inlet 13.
- the ceramic insert 12.1 is integrated in the cooling groove and forms a corrugated groove base 4.1.
- An inlet zone 11, which forms the thread inlet 13, is arranged upstream of the corrugated groove base 4.1.
- a metering opening 3 opens into the inlet zone 11 of the ceramic insert 12.1.
- the metering opening 3 is connected to a metering device 5 via a metering channel 3.1, which penetrates the ceramic insert 12.1 and the heat sink 1.
- the metering device 5 is according to the exemplary embodiment Figure 1 and 2 executed.
- the ceramic insert 12.1 extends within the cooling groove 2 over a partial length and forms a length section 6.1, which in Figure 4 is identified by the reference character L 1 .
- the thread outlet 14 is also assigned a ceramic insert 12.2.
- the ceramic insert 12.2 is integrated within the cooling groove 2 and forms a second length section 6.1 with a corrugated groove base 4.1.
- the corrugated groove base 4.1 of the ceramic inserts 12.1 and 12.2 is essentially identical.
- a cross-sectional view of the ceramic insert 12.1 is shown in the area of the corrugated groove base 4.1.
- the ceramic insert 12.1 to form the cooling groove 2 is embedded in the cooling body 1 and integrated in the groove cross-section of the cooling groove 2.
- the groove cross-section is identical to the embodiment according to FIG Figure 3 executed. In this respect, reference is made to the above description to explain the groove cross section of the cooling groove 2 and only the differences are explained at this point.
- the basic cross section 7.3 is formed by the ceramic insert 12.1.
- the groove flanks 10.1 and 10.2 of the ceramic insert 12.1 have an opening angle ⁇ 1 with respect to the groove base 10.1.
- the ceramic insert 12.1 is integrated into the heat sink 1 in such a way that, in the further course of the groove cross-section, the groove flanks 10.1 and 10.2 gradually merge into one another in the area of the basic cross-section 7.3 and the guide cross-section 7.2.
- the heat sink is usually encapsulated in a housing.
- FIG. 11 is a schematic longitudinal sectional view and FIG Figure 7 a cross-sectional view of the cooling device is shown.
- the cooling body 1 is formed by a cooling rail 20.
- Several ceramic inserts 12.1 to 12.4 are integrated within the cooling rail 20.
- the ceramic inserts 12.1 to 12.4 form the length sections 6.1 with the corrugated groove base 4.1.
- the groove cross-section is essentially identical to the exemplary embodiment according to FIG Figure 5 .
- the basic cross-section 7.3 containing the groove base 4.1 is formed by the ceramic inserts 12.1 to 12.4.
- the basic cross section 7.3 is V-shaped, with the groove flanks 10.1 and 10.2 being inclined with an opening angle ⁇ 1.
- the groove base 4.1 of the ceramic inserts 12.1 to 12.4 is formed by several grooves 9 and several guide webs 8, the thread being guided with contact on the guide webs 8. This is the one at the thread inlet 13 arranged ceramic insert 12.1 upstream of an inlet zone in which a metering opening 3 opens, as in Figure 6 shown.
- the partial cross-sections 7.2 and 7.3 of the cooling groove 2 are identical to the embodiment according to FIG Figure 5 carried out, so that no further explanation is given at this point and reference is made to the aforementioned description.
- the cooling rail 20 is held by a carrier 19 within a housing 15.
- the housing 15 encloses the cooling rail 20, the cooling rail 20 being arranged within the housing 15 between a thread inlet 16 and a thread outlet 17.
- a suction opening 21 is formed within the housing 15 in a housing base 18.
- the suction opening 21 is arranged between the thread outlet 14 and the thread outlet 17.
- the suction opening 21 is coupled via a suction line 22 to a suction device not shown here.
- the housing 15 On the opposite side in the inlet area, the housing 15 has an air opening 23.
- the air opening 23 is formed in the area between the thread inlet 16 and the thread inlet 13 of the cooling rail. The air opening 23 opens into an area surrounding the housing 15.
- the supply of a cooling liquid is ensured by a metering device 5 which is arranged outside the housing 15.
- the metering device 5 is designed identically to the aforementioned exemplary embodiment, so that reference is made to the aforementioned description at this point.
- the vapors released by evaporation of the cooling liquid on the heated thread are collected inside the housing 15 and discharged via the suction opening 21.
- a continuous stream of fresh air is introduced into the interior of the housing 15 via the air opening 23.
- An air flow that is uniform in the direction of travel of the thread is thus established, which favors the removal of the vapors above the cooling groove 2.
- the cooling device according to the invention for a synthetic thread, in particular a twisted thread within a texturing zone is particularly suitable to enable intensive cooling on the thread when the supplied cooling liquid is completely used up.
- the steep-walled cooling groove ensures that the twisted thread is guided reliably in the groove base.
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- Textile Engineering (AREA)
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Description
Die Erfindung betrifft eine Kühlvorrichtung für einen synthetischen Faden, insbesondere einen gedrallten Faden innerhalb einer Texturierzone gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a cooling device for a synthetic thread, in particular a twisted thread within a texturing zone according to the preamble of
Bei der Herstellung von synthetischen Fäden ist es bekannt, dass die in einem Schmelzspinnprozess erzeugten multifilen Fäden in einem nachgeordneten Prozess für textile Zwecke gekräuselt werden. Hierdurch erhalten die synthetischen Fäden eine der Naturfaser ähnliche Struktur. Die Weiterbehandlung der synthetischen Fäden erfolgt mittels Texturiermaschinen, die eine Vielzahl von Bearbeitungsstellen aufweisen, um in jeder Bearbeitungsstelle jeweils einen Faden zu kräuseln. Die Kräuselung des Fadens, die auch als so genannte Texturierung bezeichnet wird, lässt sich durch eine Falschdrallbehandlung erreichen. Dabei wird an dem Faden ein mechanischer Falschdrall erzeugt, der innerhalb einer Texturierzone thermisch behandelt wird. Zur thermischen Behandlung wird der gedrallte Faden auf eine Temperatur von ca. 200°C erwärmt und anschließend wieder abgekühlt. Da der in dem Faden erzeugte Falschdrall sich entgegengesetzt der Fadenlaufrichtung fortpflanzt, muss gewährleistet sein, dass der an dem Faden erzeugte Drall möglichst ungehindert die Kühlvorrichtung passiert und in die Heizvorrichtung einlaufen kann. Zu diesem Zweck werden üblicherweise Kühlvorrichtungen verwendet, die als eine gekrümmte Kühlschiene ausgebildet sind. Hierbei werden möglichst große Krümmungsradien an der Kühlschiene verwendet, um die Kontaktreibung zwischen dem gedrallten Faden und der Oberfläche der Kühlschiene gering zu halten. Derartige Kühlschienen nutzen lediglich die Umgebungsluft, um den Faden zu kühlen. Daher erfordem derartige Kühlvorrichtungen relativ lange Kühlstrecken, die üblicherweise zu einer mehretagigen Bauweise der Texturiermaschine führt.In the production of synthetic threads it is known that the multifilament threads produced in a melt spinning process are crimped in a subsequent process for textile purposes. This gives the synthetic threads a structure similar to that of natural fibers. The synthetic threads are further treated by means of texturing machines which have a large number of processing points in order to crimp one thread in each processing point. The crimping of the thread, which is also known as texturing, can be achieved through a false twist treatment. A mechanical false twist is generated on the thread, which is thermally treated within a texturing zone. For thermal treatment, the twisted thread is heated to a temperature of approx. 200 ° C and then cooled again. Since the false twist generated in the thread propagates in the opposite direction to the thread running direction, it must be ensured that the twist generated on the thread passes the cooling device as unhindered as possible and can enter the heating device. For this purpose, cooling devices are usually used, which are designed as a curved cooling rail. Here, the largest possible radii of curvature are used on the cooling rail in order to keep the contact friction between the twisted thread and the surface of the cooling rail low. Such cooling rails only use the ambient air to cool the thread. Therefore required Such cooling devices have relatively long cooling sections, which usually lead to a multi-level construction of the texturing machine.
Im Stand der Technik sind auch Kühlvorrichtungen bekannt, bei welchen die Abkühlung des Fadens mit Hilfe einer Kühlflüssigkeit intensiviert wird. Eine gattungsgemäße Kühlvorrichtung ist beispielsweise aus der
Es ist daher Aufgabe der Erfindung, eine gattungsgemäße Kühlvorrichtung derart weiterzubilden, dass eine möglichst intensive Kühlung des Fadens durch den Auftrag einer Kühlflüssigkeit innerhalb der Kühlnut erreicht wird.It is therefore the object of the invention to develop a generic cooling device in such a way that the most intensive possible cooling of the thread is achieved by applying a cooling liquid within the cooling groove.
Ein weiteres Ziel der Erfindung liegt darin, die in die Kühlnut eingeleitete Kühlflüssigkeit möglichst zur Kühlung des Fadens zu verbrauchen.Another aim of the invention is to use up the cooling liquid introduced into the cooling groove to cool the thread as much as possible.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Kühlnut einen in mehreren Teilquerschnitten unterteilten Nutquerschnitt aufweist, bei welchem die Nutwandungen in zumindest einem der Teilquerschnitte (Führungsquerschnitt) parallel zueinander oder jeweils mit einem Öffnungswinkel kleiner 15° geneigt ausgeführt sind.This object is achieved according to the invention in that the cooling groove has a groove cross-section subdivided into several partial cross-sections, in which the groove walls in at least one of the partial cross-sections (guide cross-section) are parallel to one another or each inclined with an opening angle of less than 15 °.
Vorteilhafte Weiterbildungen der Erfindung sind durch die Merkmale und Merkmalskombinationen der Unteransprüche definiert.Advantageous developments of the invention are defined by the features and combinations of features in the subclaims.
Die Erfindung basiert auf der Erkenntnis, dass die durch den Falschdrall bedingte Eigendynamik des Fadens das Auftragen der Kühlflüssigkeit beziehungsweise das Einwirken der Kühlflüssigkeit behindert. So wird ein Teil der Kühlflüssigkeit vom Faden abgeschleudert. Des Weiteren führt die Eigendynamik des Fadens, die sich im Wesentlichen durch Drehungen bemerkbar machen, zu einer quergerichteten Ausweichbewegung. Dabei besteht die Möglichkeit, dass der gedrallte Faden sich an den Nutflanken der Kühlnut hochbewegt und den Nutgrund verlässt. Um derartige Effekte zu vermeiden, weist die Kühlnut einen in mehreren Teilquerschnitten unterteilten Nutquerschnitt auf, wobei die Nutwandungen in zumindest einem der Teilquerschnitte parallel zueinander oder jeweils mit einem Öffnungswinkel kleiner 15° geneigt ausgeführt sind. So lassen sich relativ steile Nutflanken innerhalb der Kühlnut nutzen, um das Herausschleudern von Kühlflüssigkeit zu vermeiden. Des Weiteren bleibt der Faden trotz seiner Eigendynamik innerhalb der Kühlnut am Nutgrund.The invention is based on the knowledge that the inherent dynamics of the thread caused by the false twist hinders the application of the cooling liquid or the action of the cooling liquid. Part of the cooling liquid is thrown off the thread. Furthermore, the inherent dynamics of the thread, which are mainly noticeable through twists, lead to a transverse evasive movement. There is the possibility that the twisted thread moves up the groove flanks of the cooling groove and leaves the groove base. In order to avoid such effects, the cooling groove has a groove cross-section subdivided into several partial cross-sections, the groove walls in at least one of the partial cross-sections being designed parallel to one another or each inclined with an opening angle of less than 15 °. In this way, relatively steep groove flanks can be used within the cooling groove in order to prevent cooling liquid from being thrown out. Furthermore, despite its own dynamics, the thread remains within the cooling groove on the groove base.
Zur Führung des Fadens im Nutgrund der Kühlnut ist des Weiteren vorgesehen, dass einer der Teilquerschnitte (Grundquerschnitt) den Nutgrund bildet, wobei die Nutflanken mit jeweils einem größeren Öffnungswinkel gegenüber den Nutflanken des Führungsabschnittes geneigt ausgeführt sind. Hierdurch wird ein relativ enger Führungsbereich am Nutgrund der Kühlnut realisiert, in welchem der Faden mit Kontakt geführt ist und mit der Kühlflüssigkeit in Berührung kommt.To guide the thread in the groove base of the cooling groove, provision is also made for one of the partial cross-sections (basic cross-section) to form the groove base, the groove flanks each having a larger opening angle are designed to be inclined with respect to the groove flanks of the guide section. This realizes a relatively narrow guide area at the bottom of the cooling groove, in which the thread is guided with contact and comes into contact with the cooling liquid.
Damit der Faden in einer möglichst engen Kühlnut geführt werden kann, ist die Weiterbildung der Erfindung besonders vorteilhaft, bei welcher einer der Teilquerschnitte (Einlegquerschnitt) ein Ende der Nutflanken bildet, wobei die Nutflanken des Einlegequerschnittes jeweils mit einem größeren Öffnungswinkel gegenüber den Nutflanken des Grundquerschnitts geneigt ausgeführt sind. Damit lässt sich eine trichterförmige Öffnung der Kühlnut realisieren, um den Faden in einfacher Art und Weise bei einem Prozessbeginn einlegen zu können.So that the thread can be guided in a cooling groove that is as narrow as possible, the development of the invention is particularly advantageous in which one of the partial cross-sections (insertion cross-section) forms one end of the groove flanks, the groove flanks of the insertion cross-section each being inclined with a larger opening angle compared to the groove flanks of the basic cross-section are executed. A funnel-shaped opening of the cooling groove can thus be implemented in order to be able to insert the thread in a simple manner at the start of the process.
Bei einer Nutbreite im Bereich des Führungsquerschnitts von wenigen Millimetern hat sich die Weiterbildung der Erfindung besonders bewährt, bei welchem der Grundquerschnitt und der Führungsquerschnitt der Kühlnut zusammen eine Teilnuttiefe der Kühlnut bilden, die größer 50% einer Gesamtnuttiefe der Kühlnut ist. Damit lässt sich der gedrallte Faden sicher im Nutgrund der Kühlnut führen, wobei ein intensiver Verbrauch der Kühlflüssigkeit zur Kühlung des Fadens möglich ist.With a groove width in the region of the guide cross-section of a few millimeters, the further development of the invention has proven particularly useful, in which the basic cross-section and the guide cross-section of the cooling groove together form a partial groove depth of the cooling groove that is greater than 50% of a total groove depth of the cooling groove. The twisted thread can thus be guided safely in the groove base of the cooling groove, with intensive consumption of the cooling liquid for cooling the thread being possible.
Um die Kühleffekte innerhalb der Kühlnut zu intensivieren, ist die Weiterbildung der Erfindung bevorzugt ausgeführt, bei welcher der Nutgrund der Kühlnut in Fadenlaufrichtung mehrere abwechselnde Längsabschnitte aufweist, wobei einer der Längsabschnitte einen geriffelten Nutgrund mit einer Mehrzahl von Führungsstegen bildet und wobei ein anderer der Längsabschnitte einen in der Nuttiefe ausgebildeten glatten Nutgrund bildet. Durch den geriffelten Nutgrund einer der Längsabschnitte lässt sich ein kontinuierliches Mitschleifen der dem Faden zugeführten Kühlflüssigkeit vermeiden. Zudem ist die Riffelung im Nutgrund geeignet, um die an dem Faden anhaftende nicht verdampften Kühlflüssigkeitsreste abzustreifen und in der Kühlnut zu halten. So lässt sich der Faden über eine längere Strecke gleichmäßig benetzen, so dass die erzeugten Kühleffekte intensiviert werden.In order to intensify the cooling effects within the cooling groove, the development of the invention is preferably carried out in which the groove base of the cooling groove has several alternating longitudinal sections in the direction of the thread running direction, one of the longitudinal sections forming a corrugated groove base with a plurality of guide webs and another of the longitudinal sections being one Forms smooth groove bottom formed in the groove depth. By the corrugated groove bottom of one of the longitudinal sections can avoid a continuous dragging of the cooling liquid supplied to the thread. In addition, the corrugation in the groove base is suitable for wiping off the non-evaporated cooling liquid residues adhering to the thread and for keeping them in the cooling groove. In this way, the thread can be evenly wetted over a longer distance, so that the cooling effects generated are intensified.
Um diese Effekte zum Kühlen des Fadens vollständig Nutzen zu können, ist zumindest ein Längsabschnitt mit einem glatten Nutgrund vorgesehen, in welchem der Faden durch die zuvor zugeführte Kühlflüssigkeit gekühlt wird. Hierbei weisen die Längsabschnitte mit dem glatten Nutgrund eine größere Nuttiefe auf. Der Faden lässt sich somit nur mit Kontakt an den Führungsstegen führen, so dass die abwechselnd angeordneten Längsabschnitte in der Kühlnut den Faden abwechselnd mit Kontakt und ohne Kontakt führen.In order to be able to fully utilize these effects for cooling the thread, at least one longitudinal section with a smooth groove base is provided, in which the thread is cooled by the previously supplied cooling liquid. Here, the longitudinal sections with the smooth groove base have a greater groove depth. The thread can thus only be guided with contact on the guide webs, so that the alternately arranged longitudinal sections in the cooling groove guide the thread alternately with and without contact.
Die Länge der Kühlnut wird im Allgemeinen in Abhängigkeit von dem jeweils zu kühlenden Faden und dessen Fadentiter gewählt. So erfordern Fäden mit relativ großen Fadentitern relativ lange Kühlnuten. Um bei jedem Fadentyp die erfindungsgemäße Wirkung zur effektiven Kühlung zu erhalten, ist die Weiterbildung der Erfindung bevorzugt ausgeführt, bei welcher die Längsabschnitte mit geriffeltem Nutgrund und die Längsabschnitte mit glattem Nutgrund sich jeweils über eine Teillänge der Kühlnut im Bereich von 10 mm bis 40 mm erstrecken.The length of the cooling groove is generally chosen as a function of the thread to be cooled and its thread denier. Threads with relatively large denier require relatively long cooling grooves. In order to obtain the inventive effect for effective cooling with each thread type, the further development of the invention is preferably carried out in which the longitudinal sections with a corrugated groove base and the longitudinal sections with a smooth groove base each extend over a partial length of the cooling groove in the range from 10 mm to 40 mm .
Zur Führung des Fadens im Nutgrund wird bevorzugt die Weiterbildung der Erfindung ausgeführt, bei welcher der Kühlkörper an einem Fadeneinlauf der Kühlnut zumindest einen Keramikeinsatz aufweist, der innerhalb der Kühlnut einen der Längsabschnitte mit geriffeltem Nutgrund bildet. So kann der Faden über eine Mehrzahl von Stützstellen geführt werden, die trotz intensivem Kontakt die Reibung an dem Faden begrenzen und zu keiner Drallbehinderung führen.In order to guide the thread in the groove base, the development of the invention is preferably carried out in which the heat sink is at a thread inlet the cooling groove has at least one ceramic insert which forms one of the longitudinal sections with a corrugated groove base within the cooling groove. The thread can thus be guided over a plurality of support points which, despite intensive contact, limit the friction on the thread and do not lead to any obstruction of twist.
Die Zufuhr der Kühlflüssigkeit erfolgt bevorzugt in einer Einlaufzone des Nutgrundes, die dem geriffelten Nutgrund am Keramikeinsatz vorgeordnet ist. So mündet die Dosieröffnung in der Einlaufzone, die vom Faden mit Kontakt oder vorzugsweise ohne Kontakt durchquert wird. Damit ist eine kontinuierliche und dosierte Zufuhr der Kühlflüssigkeit in die Kühlnut möglich.The cooling liquid is preferably supplied in an inlet zone of the groove base, which is arranged upstream of the corrugated groove base on the ceramic insert. The metering opening ends in the inlet zone through which the thread with contact or preferably without contact. This enables a continuous and metered supply of the cooling liquid into the cooling groove.
Zur stabilen Fadenführung ist des Weiteren vorgesehen, dass der Kühlkörper an einem Fadenauslass der Kühlnut zumindest einen weiteren Keramikeinsatz mit einem geriffelten Nutgrund aufweist, wobei die Kühlnut zwischen den Keramikeinsätzen zumindest einen der Längsabschnitte mit dem glatten Nutgrund aufweist. Somit kann der Faden auch am Fadenauslass mit ausreichendem Fadenkontakt in der Kühlnut geführt werden, ohne dass unzulässige hohe Fadenreibungen entstehen.For stable thread guidance, it is also provided that the heat sink has at least one further ceramic insert with a corrugated groove base at a thread outlet of the cooling groove, the cooling groove having at least one of the longitudinal sections with the smooth groove base between the ceramic inserts. Thus, the thread can also be guided in the cooling groove at the thread outlet with sufficient thread contact, without inadmissibly high thread friction occurring.
Aufgrund der geriffelten Nutgrundstrukturen der Längsabschnitte innerhalb der Kühlnut lassen sich relativ große Fadenumlenkungen innerhalb der Texturierzone realisieren. So ist der Nutgrund der Kühlnut am Kühlkörper vorzugsweise derart ausgebildet, dass der Faden in Fadenlaufrichtung auf einer Führungsbahn mit einem Radius im Bereich von 300 mm bis 1000 mm führbar ist. Damit können sehr kompakte Texturierzonen innerhalb von Texturiermaschinen realisiert werden.Because of the corrugated basic groove structures of the longitudinal sections within the cooling groove, relatively large thread deflections can be implemented within the texturing zone. The groove base of the cooling groove on the heat sink is preferably designed in such a way that the thread can be guided in the thread running direction on a guide track with a radius in the range from 300 mm to 1000 mm. This means that very compact texturing zones can be implemented within texturing machines.
Der Kühlkörper lässt sich zur Ausbildung der Kühlnut mehrteilig oder auch einteilig ausführen. Vorzugsweise wird der Kühlkörper durch eine Kühlschiene gebildet, welche innerhalb eines Gehäuses zwischen einem Fadeneinlass und einem Fadenauslass gehalten ist. So können alle auftretenden Dämpfe isoliert von einer Umgebung abgefangen werden.The heat sink can be made in several parts or in one part to form the cooling groove. The cooling body is preferably formed by a cooling rail which is held within a housing between a thread inlet and a thread outlet. In this way, all vapors that occur can be intercepted in isolation from an environment.
Die erfindungsgemäße Vorrichtung ist daher besonders geeignet, um in Texturiermaschinen mit einer Vielzahl von Bearbeitungsstellen eingesetzt zu werden.The device according to the invention is therefore particularly suitable for use in texturing machines with a large number of processing points.
Die erfindungsgemäße Kühlvorrichtung für einen synthetischen Faden insbesondere einen gedrallten Faden innerhalb einer Texturierzone wird nachfolgend anhand mehrerer Ausführungsbeispiele unter Bezug auf die beigefügten Figuren näher erläutert.The cooling device according to the invention for a synthetic thread, in particular a twisted thread within a texturing zone, is explained in more detail below on the basis of several exemplary embodiments with reference to the accompanying figures.
Es stellen dar:
-
schematisch eine Längsschnittansicht eines ersten Ausführungsbeispiels der erfindungsgemäßen Kühlvorrichtung,Figur 1 -
schematisch eine Querschnittsansicht des Ausführungsbeispiels ausFigur 2Figur 1 , -
schematisch eine Querschnittsansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Kühlvorrichtung,Figur 3 -
Figur 4 schematisch eine Längsschnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Kühlvorrichtung, -
schematisch eine Querschnittsansicht des Ausführungsbeispiels ausFigur 5Figur 4 , -
Figur 6 schematisch eine Längsschnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Kühlvorrichtung, -
Figur 7 schematisch eine Querschnittsansicht des Ausführungsbeispiels der erfindungsgemäßen Kühlvorrichtung ausFigur 6 .
-
Figure 1 schematically a longitudinal sectional view of a first embodiment of the cooling device according to the invention, -
Figure 2 schematically shows a cross-sectional view of the embodimentFigure 1 , -
Figure 3 schematically a cross-sectional view of a further embodiment of the cooling device according to the invention, -
Figure 4 schematically a longitudinal sectional view of a further embodiment of the cooling device according to the invention, -
Figure 5 schematically shows a cross-sectional view of the embodimentFigure 4 , -
Figure 6 schematically a longitudinal sectional view of a further embodiment of the cooling device according to the invention, -
Figure 7 schematically shows a cross-sectional view of the embodiment of the cooling device according to the inventionFigure 6 .
In den
Das Ausführungsbeispiel weist einen länglichen Kühlkörper 1 auf. An einer Führungsseite des Kühlkörpers 1 erstreckt sich eine offene Kühlnut 2. Die Kühlnut 2 erstreckt sich bis zu den Stirnenden des Kühlkörpers 1. Die Kühlnut 2 bildet somit an den Stirnenden einen Fadeneinlauf 13 und an dem gegenüberliegenden Stirnende einen Fadenauslauf 14, wie in
Um einen Faden zwischen dem Fadeneinlauf 13 und dem Fadenauslauf 14 innerhalb der Kühlnut 2 am Nutgrund zu führen, weist die Kühlnut 2 mehrere Längsabschnitte 6.1 mit einem geriffelten Nutgrund 4.1 und mehrerer Längsabschnitte 6.2 mit einem glatten Nutgrund 4.2 auf. Die Längsabschnitte 6.1 und 6.2 sind in Fadenlaufrichtung abwechselnd in der Kühlnut 2 ausgebildet.In order to guide a thread between the
Dem Fadeneinlauf 13 ist ein erster Längsabschnitt 6.1 mit dem geriffelten Nutgrund 4.1 zugeordnet. Dem geriffelten Nutgrund 4.1 des ersten Längsabschnittes 6.1 ist eine Einlaufzone 11 vorgeordnet, in welcher eine Dosieröffnung 3 mündet. Die Dosieröffnung 3 ist über einen Dosierkanal 3.1 innerhalb des Kühlkörpers 1 mit einer Fluidleitung 5.1 verbunden. Die Fluidleitung 5.1 ist mit einer Dosiereinrichtung 5 gekoppelt, die ein Dosiermittel 5.2 und einen Behälter 5.3 aufweist. Das Dosiermittel 5.2 ist vorzugsweise als eine Dosierpumpe ausgebildet, wobei in dem Behälter 5.3 eine Kühlflüssigkeit vorgehalten ist.A first longitudinal section 6.1 with the corrugated groove base 4.1 is assigned to the
Die
Wie aus der Darstellung in
Zur Führung des Fadens im Nutgrund 4.1 der Kühlnut 2 bilden der Führungsquerschnitt 7.2 und der Grundquerschnitt 7.3 der Kühlnut 2 eine Teilnuttiefe tF. Die Teilnuttiefe tF der Kühlnut ist größer als 50 % der Gesamtnuttiefe t1 im Bereich des geriffelten Nutgrundes 4.1.To guide the thread in the groove bottom 4.1 of the cooling
Somit gilt: tF > 0,5 x t1 Hence: t F > 0.5 xt 1
Wie aus der Darstellung in
Im Betrieb wird über die Dosiereinrichtung 5 eine Kühlflüssigkeit in kleinen Mengen dosiert der Einlaufzone 11 im Bereich des Längenabschnittes 6.1 zugeführt. Durch den laufenden Faden wird die Kühlflüssigkeit zum Teil unmittelbar aufgenommen und über die geriffelte Struktur des Nutgrundes 4.1 verteilt. Damit wird eine relativ lange Kontaktzone zur Benetzung des Fadens erreicht. Der Längsabschnitt 6.1 weist hierzu eine Länge L1 auf, der je nach Fadentiter einen Bereich von 10 mm bis 40 mm aufweist.Die Länge L1 des Längsabschnitts 6.1 ist in
Im weiteren Verlauf der Kühlnut 2 folgt eine Nicht-Kontaktzone, bei welchem der Faden in einem der Längsabschnitte 6.2 ohne Kontakt geführt wird. In diesem Abschnitt wirkt die auftragende Flüssigkeit zur Kühlung des Fadens. Der Längsabschnitt 6.2 erstreckt sich ebenfalls über eine Länge der Kühlnut 2, der je nach Fadentiter eine gleiche oder ungleiche Länge besitzt. Die Länge ist in
Im weiteren Verlauf der Kühlnut 2 folgt eine Kontaktzone mit dem geriffelten Nutgrund 4.1 sowie eine Nicht-Kontaktzone mit dem glatten Nutgrund 4.2 und ein weiterer dem Fadenauslauf 14 zugeordneter Längsabschnitt 6.1 mit geriffeltem Nutgrund 4.1. Der mittlere Längsabschnitt 6.1 mit dem geriffelten Nutgrund 4.1 nimmt einerseits die überschüssige Kühlflüssigkeit von dem Faden ab und führt gleichzeitig zu einer Vergleichmäßigung der Benetzung um weitere Kühlung zu erhalten. Im letzten Längsabschnitt 6.1 am Fadenauslauf 14 wird der Faden im Wesentlichen ohne anhaftende überschüssige Kühlflüssigkeit aus der Kühlnut 2 herausgeführt.In the further course of the cooling
Zur sicheren Führung des gedrallten Fadens weist die Kühlnut 2 eine Nuttiefe t1 im Bereich von 4 bis 10 mm auf. Die Breite der Kühlnut 2 insbesondere im Bereich des Führungsquerschnittes 7.2 liegt bei wenigen Millimetern, um das Herausschleudern von Kühlflüssigkeit und das Heraustreten des Fadens zu verhindern. Die Breite der Kühlnut beträgt vorzugsweise 0,5 mm bis 4 mm.For the secure guidance of the twisted thread, the cooling
Bei dem in
Ebenso ist der in
Der Nutquerschnitt der Kühlnut 2 des Ausführungsbeispiels nach
Im Verhältnis zu dem Einlegquerschnitt 7.1 und dem Grundquerschnitt 7.3 ergibt sich folgendes Größenverhältnis in der Ausführung der Öffnungswinkel α1, α2 und α3.In relation to the insertion cross-section 7.1 and the basic cross-section 7.3, the following size ratio results in the execution of the opening angles α 1 , α 2 and α 3 .
Es gilt: α3 > α1 > α2 The following applies: α 3 > α 1 > α 2
Wesentlich hierbei ist, dass der Führungsquerschnitt 7.2 und der Grundquerschnitt 7.1 der Kühlnut 2 eine ausreichende Teilnuttiefe tF aufweist, um insbesondere das Herausschleudern von Kühlflüssigkeit zu vermeiden.It is essential here that the guide cross-section 7.2 and the basic cross-section 7.1 of the cooling
Bei dem in
Wie aus der Darstellung in
Der Keramikeinsatz 12.1 erstreckt sich innerhalb der Kühlnut 2 über eine Teillänge und bildet einen Längenabschnitt 6.1, der in
Wie aus der Darstellung in
Wie aus der Darstellung in
Bei dem in
Bei dem in
Bei dem in
Um die bei der Kühlung auftretenden Dämpfe nicht in die Maschinenumgebung abzugeben, ist der Kühlkörper üblicherweise in einem Gehäuse gekapselt. Hierzu ist in den
Bei dem in
Wie aus der Darstellung in
Die Teilquerschnitte 7.2 und 7.3 der Kühlnut 2 sind hierbei identisch zu dem Ausführungsbeispiel nach
Wie aus der Darstellung in
Auf der gegenüberliegenden Seite im Einlaufbereich weist das Gehäuse 15 eine Luftöffnung 23 auf. Die Luftöffnung 23 ist im Bereich zwischen dem Fadeneinlass 16 und dem Fadeneinlauf 13 der Kühlschiene ausgebildet. Die Luftöffnung 23 mündet in einer Umgebung des Gehäuses 15.On the opposite side in the inlet area, the
Die Zufuhr einer Kühlflüssigkeit wird durch eine Dosiereinrichtung 5 gewährleistet, die außerhalb des Gehäuses 15 angeordnet ist. Die Dosiereinrichtung 5 ist identisch zu dem vorgenannten Ausführungsbeispielen ausgeführt, so dass an dieser Stelle Bezug zu der vorgenannten Beschreibung genommen wird.The supply of a cooling liquid is ensured by a
Im Betrieb werden die durch Verdampfung der Kühlflüssigkeit an dem erwärmten Faden freiwerdenden Dämpfe innerhalb des Gehäuses 15 gesammelt und über die Saugöffnung 21 abgeführt. Hierbei wird ein kontinuierlicher Frischluftstrom über die Luftöffnung 23 in das Innere des Gehäuses 15 eingeleitet. Es stellt sich so eine in Fadenlaufrichtung gleichmäßige Luftströmung ein, die die Abfuhr der Dämpfe oberhalb der Kühlnut 2 begünstigt.During operation, the vapors released by evaporation of the cooling liquid on the heated thread are collected inside the
Die erfindungsgemäße Kühlvorrichtung für einen synthetischen Faden insbesondere einen gedrallten Faden innerhalb einer Texturierzone ist besonders geeignet, um an dem Faden eine intensive Kühlung bei vollständigem Aufbrauch der zugeführten Kühlflüssigkeit zu ermöglichen. Durch die steilwandige Kühlnut wird eine sichere Fadenführung des gedrallten Fadens im Nutgrund erreicht.The cooling device according to the invention for a synthetic thread, in particular a twisted thread within a texturing zone, is particularly suitable to enable intensive cooling on the thread when the supplied cooling liquid is completely used up. The steep-walled cooling groove ensures that the twisted thread is guided reliably in the groove base.
Claims (11)
- Cooling apparatus for a synthetic thread, in particular a twisted thread, within a texturing zone, having an elongate cooling body (1) which on a guiding side has an open cooling groove (2) for guiding the thread, wherein the cooling groove (2) by way of a metering opening (3) in the groove base (4.1) is connected to a metering installation (5) for feeding a cooling liquid, characterized in that the cooling groove (2) has a groove cross section which is subdivided into a plurality of part-cross sections (7.1, 7.2, 7.3), in which the groove flanks (10.1, 10.2) in at least one of the part-cross sections (7.2) (guiding cross section) are embodied so as to be mutually parallel or in each case inclined at an opening angle (α2)< 15°.
- Cooling apparatus according to Claim 1, characterized in that one of the part-cross sections (7.3) (base cross section) forms the groove base (4.1, 4.2), wherein the groove flanks (10.1, 10.2) are in each case embodied so as to be inclined at a larger opening angle (α3) in relation to the groove flanks (10.1, 10.2) of the guiding portion (7.2).
- Cooling apparatus according to Claim 1 or 2, characterized in that one of the part-cross sections (7.1) (placing cross section) forms an end of the groove flanks (10.1, 10.2), wherein the groove flanks (10.1, 10.2) of the placing cross section (7.1) are in each case embodied so as to be inclined at a larger opening angle (α3) in relation to the groove flanks (10.1, 10.2) of the base cross section (7.3).
- Cooling apparatus according to one of Claims 1 to 3, characterized in that the base cross section (7.3) and the guiding cross section (7.2) of the cooling groove (2) conjointly form a part-groove depth (tF) of the cooling groove (2) which is larger than 50% of an overall groove depth (t1) of the cooling groove (2).
- Cooling apparatus according to one of Claims 1 to 4, characterized in that the groove base (4.1, 4.2) of the cooling groove (2) in the thread running direction has a plurality of alternating longitudinal portions (6.1, 6.2), wherein one of the longitudinal portions (6.1) forms a fluted groove base (4.1) having a plurality of guide webs (8), and wherein another of the longitudinal portions (6.2) forms a smooth groove base (4.2) that is configured so as to be deeper in the cooling groove (2).
- Cooling apparatus according to Claim 5, characterized in that the longitudinal portions (6.1) having a fluted groove base (4.1), and the longitudinal portions (6.2) having a smooth groove base (4.2), extend in each case across a part-length of the cooling groove (2) in the range from 10 mm to 40 mm.
- Cooling apparatus according to Claim 5 or 6, characterized in that the cooling body (1) on a thread entry (13) of the cooling groove (2) has at least one ceramic insert (12.1) which within the cooling groove (2) forms one of the longitudinal portions (6.1) having a fluted groove base (4.1).
- Cooling apparatus according to Claim 7, characterized in that the metering opening (3) is disposed upstream of the fluted groove base (4.1) on the ceramic insert (12.1), and opens into an entry zone (11) of the groove base (4.1) of the cooling groove (2).
- Cooling apparatus according to one of Claims 5 to 8, characterized in that the cooling body (1) on a thread exit (14) of the cooling groove (2) has at least one further ceramic insert (12.2) having a fluted groove base (4.1), wherein the cooling groove (2) between the ceramic inserts (12.1, 12.2) has at least one of the longitudinal portions (6.2) having the smooth groove base (4.2).
- Cooling apparatus according to one of Claims 1 to 9, characterized in that the groove base (4.1, 4.2) of the cooling groove (2) on the cooling body (1) is configured in such a manner that the thread in the thread running direction is capable of being guided on a guide path having a radius (R) in the range from 300 mm to 1000 mm.
- Cooling apparatus according to one of Claims 1 to 10, characterized in that the cooling body (1) is formed by an elongate cooling rail (20) which within a housing (15) is held between a thread inlet (16) and a thread outlet (17).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016013519 | 2016-11-11 | ||
PCT/EP2017/078334 WO2018087042A1 (en) | 2016-11-11 | 2017-11-06 | Cooling apparatus for a synthetic thread |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3538697A1 EP3538697A1 (en) | 2019-09-18 |
EP3538697B1 true EP3538697B1 (en) | 2021-02-24 |
Family
ID=60245113
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17793961.8A Active EP3538697B1 (en) | 2016-11-11 | 2017-11-06 | Cooling apparatus for a synthetic thread |
Country Status (3)
Country | Link |
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EP (1) | EP3538697B1 (en) |
CN (1) | CN109963970B (en) |
WO (1) | WO2018087042A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112011922B (en) * | 2019-05-30 | 2024-04-12 | 欧瑞康纺织有限及两合公司 | Cooling equipment for cooling synthetic fibers by using cooling liquid of textile machinery |
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WO2018059743A1 (en) * | 2016-09-28 | 2018-04-05 | Oerlikon Textile Gmbh & Co. Kg | Method and device for cooling a synthetic thread |
WO2018065123A1 (en) * | 2016-10-08 | 2018-04-12 | Oerlikon Textile Gmbh & Co. Kg | Device for cooling a heated thread |
EP3312322A1 (en) * | 2016-10-19 | 2018-04-25 | Oerlikon Textile GmbH & Co. KG | Device for cooling a heated thread |
EP3312321A1 (en) * | 2016-10-19 | 2018-04-25 | Oerlikon Textile GmbH & Co. KG | Device for cooling synthetic yarns |
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GB1166244A (en) * | 1966-03-01 | 1969-10-08 | Scragg & Sons | Yarn Heater. |
GB8913825D0 (en) | 1989-06-15 | 1989-08-02 | Rieter Scragg Ltd | Yarn texturing method and apparatus |
DE4227115A1 (en) * | 1991-08-26 | 1993-03-04 | Barmag Barmer Maschf | False twister yarn path - has surface structures to allow twist to travel back along the yarn |
DE19933990A1 (en) * | 1998-07-27 | 2000-02-03 | Barmag Barmer Maschf | Heat setting zone for false twist texturing of synthetic yarns comprises a first section with yarn in contact with heater and a second section without contact on heater surface |
WO2007054334A1 (en) * | 2005-11-12 | 2007-05-18 | Oerlikon Textile Gmbh & Co. Kg | Apparatus for diverting a highly elastic thread |
DE102011018179A1 (en) * | 2011-04-19 | 2012-10-25 | Oerlikon Textile Gmbh & Co. Kg | Device for applying fluid to running multifilament thread, has non-contact and contact surfaces allowed to form surface portion in groove base along longitudinal direction with specific radius of curvature to enable wetting of thread |
CN202450222U (en) * | 2012-03-02 | 2012-09-26 | 江阴市大森电气有限公司 | Heat box |
CN202671772U (en) * | 2012-06-27 | 2013-01-16 | 浙江精功科技股份有限公司 | Deforming heat box of false twist texturing machine for spinning |
CN104233557A (en) * | 2013-06-08 | 2014-12-24 | 苏州联优织造有限公司 | Doubling thread cooling device |
CN203284556U (en) * | 2013-06-08 | 2013-11-13 | 苏州联优织造有限公司 | Doubling thread cooling device |
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2017
- 2017-11-06 WO PCT/EP2017/078334 patent/WO2018087042A1/en unknown
- 2017-11-06 CN CN201780070004.9A patent/CN109963970B/en active Active
- 2017-11-06 EP EP17793961.8A patent/EP3538697B1/en active Active
Patent Citations (5)
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WO2017089191A1 (en) * | 2015-11-26 | 2017-06-01 | Oerlikon Textile Gmbh & Co. Kg | False-twist texturing device |
WO2018059743A1 (en) * | 2016-09-28 | 2018-04-05 | Oerlikon Textile Gmbh & Co. Kg | Method and device for cooling a synthetic thread |
WO2018065123A1 (en) * | 2016-10-08 | 2018-04-12 | Oerlikon Textile Gmbh & Co. Kg | Device for cooling a heated thread |
EP3312322A1 (en) * | 2016-10-19 | 2018-04-25 | Oerlikon Textile GmbH & Co. KG | Device for cooling a heated thread |
EP3312321A1 (en) * | 2016-10-19 | 2018-04-25 | Oerlikon Textile GmbH & Co. KG | Device for cooling synthetic yarns |
Also Published As
Publication number | Publication date |
---|---|
WO2018087042A1 (en) | 2018-05-17 |
CN109963970A (en) | 2019-07-02 |
EP3538697A1 (en) | 2019-09-18 |
CN109963970B (en) | 2022-02-11 |
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