EP0656963A1 - Einstellbare heizeinrichtung für einen laufenden faden - Google Patents
Einstellbare heizeinrichtung für einen laufenden fadenInfo
- Publication number
- EP0656963A1 EP0656963A1 EP93919156A EP93919156A EP0656963A1 EP 0656963 A1 EP0656963 A1 EP 0656963A1 EP 93919156 A EP93919156 A EP 93919156A EP 93919156 A EP93919156 A EP 93919156A EP 0656963 A1 EP0656963 A1 EP 0656963A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- heating
- heating device
- carriers
- tube
- 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.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 274
- 239000000969 carrier Substances 0.000 claims description 54
- 238000012546 transfer Methods 0.000 claims description 29
- 238000004140 cleaning Methods 0.000 claims description 22
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 229920001169 thermoplastic Polymers 0.000 abstract description 3
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 3
- 238000013021 overheating Methods 0.000 abstract 1
- 238000002788 crimping Methods 0.000 description 9
- 238000013461 design Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 8
- 230000008859 change Effects 0.000 description 8
- 230000001419 dependent effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 241001589086 Bellapiscis medius Species 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- -1 polyethylene terephthalate Polymers 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 239000012815 thermoplastic material Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
Definitions
- the invention relates to a heating device, in particular an elongated body, such as. B. a heating tube for heating a running thread.
- Such a heater finds e.g. Use on a false twister crimping machine.
- Devices for heating running chemical threads in false twist crimping processes are known. In general, they have rails which lie in elongated heating chambers which can be heated to a certain temperature and over which a thread can be guided over thread carriers, so-called webs, in order to be heated.
- Tubular thread overflow bodies are known for the stretching and thermal fixing of synthetic threads.
- DE-AS 13 03 384 describes an overflow body which is wound around the thread.
- This overflow body has a rotationally symmetrical shape and is provided with a bead at the thread run-up end and can be heated continuously from its thread run-up to its thread run-off end from the thread stretching to the thread fixing temperature and is designed and arranged in such a way that it runs from the thread in the form of a steep thread can be entwined.
- the structure of this thread overflow body is complicated and requires a large number of expensive work steps for its production. In addition, it should not use the modern high-speed process reliability.
- the threads run at considerable speed in modern false twist crimping processes.
- the temperatures prevailing in the heating chambers are therefore correspondingly high, which can lead to damage to the thread if it comes into contact with the heating surfaces of the heating device.
- foil strips and filaments are always included when a thread is mentioned below.
- Polyamide or polyethylene terephthalate (PA6, PA6.6) is particularly suitable as the thermoplastic material for the thread, but without being restricted to these materials.
- the object of the invention is to provide a heating device in which the heat transfer to the thread can be varied in a simple manner, in particular without changing the temperature of the heating device.
- the invention is intended to provide a filament heating device which enables temperature profiles which lie within wide limits in accordance with the required heat transfer conditions.
- Heating device are provided, which makes changes possible both in the curvature and in the length of the thread path and in the thread overflow or contact length. The heating device should be able to be operated, in particular, even at high temperatures of all components at which the self-cleaning effects can be effectively used.
- the dwell time of a thread on the heating surface can be varied by changing the width of the thread overflow webs. This means that by changing the size of the heated surface on which the thread rests, the heat transferred to the thread also changes.
- the profile of the heat transfer can also be regulated by a corresponding change in the contact-free zones located between the webs.
- height-adjustable webs which allow the distance between the heating surface itself and the thread path to be set uniformly or variably.
- the radiator is a tube on which rings or disks are inserted as thread overflow webs. The circumferential surfaces of these rings serve as thread contact or overflow surfaces and bring about the heat transfer to the thread running over them.
- the rings can be of a uniform or continuous or step-wise variable width and / or height around their circumference. The axial distance between them can be constant and unchangeable, or it can increase or decrease in the thread running direction or can be variable in some other way.
- the rings can be spaced apart from one another by grooves cut into the surface of the radiator, or they can be arranged fixed or adjustable on the surface.
- the thread overflow lengths can be changed by providing thread guides in the thread running direction directly in front of and behind the heating element, the position of which can be adjusted relative to the heating element and / or to one another. If necessary, these thread guides can also be provided at the inlet and outlet of the radiator itself.
- the heating device according to the invention can be operated in a temperature range which corresponds to the self-cleaning temperature of the heated surface.
- the heating surface and thread carrier can be kept at a high temperature during operation, in particular at a temperature above a temperature necessary for self-cleaning, without the thread being damaged.
- the thread carrier height is between about 0.1 mm and 5 mm, preferably between 0 and 5 mm and 3 mm is selected.
- the lower limit is determined by the curvature of the heating surface and the steepness of the helix in which the thread is guided or the curvature of the heating surface, as well as by the distance between the successive thread carriers and must be chosen so that the thread is the heating surface not even touched.
- the invention makes use of the knowledge that the self-cleaning temperature is of the order of approximately 430 degrees Celsius, and that the influence of the heat transfer from the heated surface to the thread to be heated results in the thread having a lower temperature, e.g. Exposed to 330 degrees Celsius.
- thermoplastic threads with low titers of e.g. 20 den. and for example run through the heating device according to the invention at a thread speed of approximately 1000 meters per minute.
- This option is particularly useful if a heating device is provided for a plurality of threads to be heated.
- one of the thread heating zones during the cleaning phase other threads continue to run in its associated thread heating zone without the self-cleaning of the first thread heating zone having an effect on the quality of the thread still running in the second thread heating zone.
- This heating device is described in EP 0 412 429 A2.
- the advantage of this heating device lies on the one hand in its high heating power which can be transferred to the thread and which allows the heater to be of a short length.
- the other advantage is the self-cleaning effect.
- An additional object of the invention with regard to this special embodiment is to further design the known heater in such a way that cleaning of the heater from baked or cracked residues of the thermoplastic thread material is not necessary.
- the heater have an entrance area in which the thread has little or no contact with thread carriers, in that the thread carriers are arranged there only at a large distance.
- the input area is preferably equipped with only one input thread guide and the output area with only one output thread guide.
- the input thread guide remains cold.
- the thread guide has no thermal contact with the heating surface.
- the thread guide remains essentially cold, so that there can be no segregation of thermoplastic material.
- the thread guide on the output side should have self-cleaning properties. It is therefore preferably connected directly to the heating surface and lies at the beginning of the so-called "control section", which adjoins the entrance area.
- the control section is the section in which the thread receives its target temperature.
- Several thread carriers are arranged in the control section. These thread carriers have the same or - as represented by the above-mentioned EP 0 412 429 A2 - variable distances.
- the use of the thread carrier in the control section ensures that the thread is guided at a precisely definable distance from the heating surface.
- the heating device be given a gradation between the input section and the control section in such a way that the distance of the heating surface in the input section from the thread path is greater , is preferably a multiple of the distance that the thread path in the control section of the Heating surface.
- the thread carriers are fastened as webs on the heating surface and have good heat-conducting contact.
- the webs and the heating surface are made in one piece, i. that is, the heating surface consists of webs and thus alternating depressions. Each of these measures is suitable and intended to ensure that the webs are heated to the same high temperature as the heating surface, i. H. to temperatures higher than 300 ° C to 350 ° C.
- the arrangement of the thread carriers according to the invention ensures that the thread carriers are only arranged in the zone in which the correct temperature of the thread on the one hand and the heater temperature on the other hand ensure self-cleaning.
- An exact temperature control of the heating device takes place in the control zone, preferably by regulation.
- the precise guidance of the thread relative to the heating device ensures here that the thread assumes the predetermined target temperature.
- the so-called dwell time of the thread can be kept within wide limits, ie the contact surface between thread and thread carrier is adjusted depending on the temperatures measured on the thread or on the heating element. Precise guidance of the thread is dispensed with in the entrance section.
- the heating of the thread in the control area has the effect that the outer layers of the thread first assume the desired temperature. However, uniform heating of the thread over its entire cross-section is required.
- This goal is calibrated in that an end section is arranged after the control section, in which thread carrier is in turn arranged at a large distance or no thread carrier is arranged.
- the distance between the thread path and the heating surface should preferably be larger, preferably a multiple of the distance, which thread path and heating surface have in the control range. This arrangement of the end section ensures that heat losses are prevented with only slight heat transfer and that the heat supplied in the control section is uniformly distributed over the entire thread cross section.
- the end section is in any case shorter than the entrance section.
- the length of the end section is preferably limited to 300 mm and should in particular be even shorter.
- the distance between the thread path and the heating surface in the end section and in the input section is larger, preferably a multiple of the distance in the control range, but is preferably also limited to 5 mm, preferably 3 mm.
- the contact length of the thread carrier is adjustable. This also allows the heating to be optimally adjusted to the thread speed and thread diameter (titer) desired in each case. For execution, it is advisable to design the heating device and thread carrier so that the thread carriers are interchangeable.
- a heater can e.g. B. have the shape of a tube, on the circumference of which several webs are provided which widen in the circumferential direction in their axial extent. These webs can be successively offset on the circumference. This makes it easier for the thread that wraps around the tube in a screw-like manner to successively touch the webs in regions in which the webs have essentially the same contact length.
- Heating effect on the specific process parameters, especially thread titer and running speed, consists of a through Composed sections of radiators variable in length.
- a sleeve or a cage on an essentially smooth heating tube, the inside diameter of which corresponds to the outside diameter of the heating tube and the jacket of which is penetrated by recesses of the same shape which are lined up in rows.
- Lines of uniform recesses are preferably diametrically opposite one another in the cuff, lines with recesses of other shapes preferably lying next to these lines of recesses arranged in a row.
- the lines preferably run parallel to the axis. Between the rows of recesses there are uniform, circumferentially extending webs corresponding to the shape of the recesses.
- the sleeve is secured on the heating pipe against axial displacement, but can be turned.
- the thread can always be passed over a clean overflow point of the webs by gradually turning the sleeve on the tube; on the other hand, the thread can be heated in wide temperature ranges due to the different design of the webs. Since uniform webs or recesses lie diametrically opposite one another in the cuff or are repeated at certain angular intervals, overflow paths for two or more threads are formed. Otherwise, the webs running between the rows in the longitudinal direction of the cuff are of no significance for the essence of the invention.
- Fig. 1 is a plan view of a suitable for guiding a thread disc. the invention
- FIG. 2 shows a section along line II-II in FIG. 3; 3 shows a side view of the heating device according to the invention;
- FIG. 5 shows a side view of a third embodiment of the invention
- FIG. 6 shows a fourth embodiment with adjustable thread guides of the invention in side view.
- Fig. 7 is a sectional view of a heater with rings, the height of which changes in the circumferential direction.
- Fig. 8 is a perspective view of a heater according to. Fig. 7 with rotatable relative to each other
- FIG. 9 shows a plan view of a heating device with web widths and web heights that change in the circumferential direction; 10 shows an axial plan view of a heating device according to the invention;
- FIG. 13 shows a further exemplary embodiment of the invention with a non-adjustable and an adjustable filament heating zone
- FIG. 14 shows a further exemplary embodiment of the invention with two differently adjustable thread heating zones; 15 axial plan views of heating devices, each with two filament heating zones and elliptical rings or eccentric rings;
- 16 shows a further longitudinal section; 17 is a view of a tubular heater;
- 19 shows a plan view of the blank of a thread overflow sleeve in the rolled-out state with three pairs of different thread overflow webs
- 20 is a perspective view, on a reduced scale, of a heating tube with a sleeve placed thereon;
- FIG. 21 shows a longitudinal section through a heating tube consisting of a plurality of mutually adjustable sections
- FIG. 22 shows a longitudinal section through another heating tube consisting of sections.
- the heating device shown in FIG. 3 has a tube 1, in the following the heating tube.
- the heating tube 1 carries in its interior two heating resistors 6 running parallel to one another, which are preferably separated from one another and from the inner circumferential surface of the heating tube 1 by a suitable insulating material such as, for example, magnesium oxide or magnesium silicate powder.
- the heating tube 1 consists of a highly thermally conductive metal, such as steel or preferably a copper-aluminum alloy.
- a plurality of rings or disks 2 are placed on the heating tube 1. These disks 2, which are shown in detail in FIGS. 1 and 2, are circular and are provided with a radial slot 5, the clear width of which essentially corresponds to the diameter of the heating tube 1 and the latter opposite edges are parallel to each other.
- the outer edge of the discs 2 is spherical. There is a plurality of depressions or recesses 4 in one end face of the disks, which are at the same distance from one another and from the axis of the disk 2.
- a pin 3 serving as a spacer protrudes from the opposite end face of the disk 2 and its distance from the axis of the disk corresponds to the distance of the recesses 4 from the disk axis.
- the washers 2 are placed on the heating tube 1 such that the pin 3 protruding from a washer 2 protrudes into a recess 4 of an adjacent washer, the washers 2 preferably being placed on the heating tube in a regular angular displacement, so that the openings of the slots 5 and the pins 3 surround the heating tube in coils or lie one above the other in a grid pattern in the axial direction of the tube 1.
- a spring clip 10 can be inserted into the contactors 5, the leg of which rests against the opposite slot edges and the tip of which rests on the tube 1.
- the spherical edges of the disks 2 serve to guide a thread 7, which is placed via an input thread guide 8 on the thread overflow surface of the heating device formed by the spherical edges of the discs 2 and leaves this via an exit thread guide 9 which is angularly and axially offset from the thread carrier 8. That is, the thread 7 wraps around the device in a spiral, the pitch depends on the offset of the thread carriers 8 and 9 to each other. At least one of the thread carriers can be pivoted relative to the other about the axis of the heating tube 1, so that the length of the thread path over the disks 2 can be changed by changing the pitch of the helix formed by the thread 7.
- the positions of the thread carriers 8 and 9 lie on both sides of the slots 5 and the helix of the thread 7 lies in the area of the disks 2 located outside the slots 5.
- the disks are made of a heat and scale resistant material, e.g. B. aluminum oxide or titanium oxide.
- a heat and scale resistant material e.g. B. aluminum oxide or titanium oxide.
- these can optionally be coated with a suitable metal and to increase their thread friendliness, the window edges can be ground or polished.
- the embodiment of the invention shown in FIG. 4 consists of a heating tube 1 provided with an electrical heating resistor wire 6, which is surrounded by a plurality of rings 2.
- the rings 2 are firmly connected to the heating tube 1, for example by soldering, and are at the same distance from one another.
- the rings 2 can, however, also be formed by beads which are compressed into the tube at regular intervals.
- the rings can also be spaced apart from one another by grooves which are incorporated in the outer jacket of the heating tube 1.
- the radially protruding circumferential surface of the rings 2 is spherical and is thread-friendly in nature.
- the rings 2 serve to guide a thread 7 at a distance over the circumferential surface of the heated tube 1, the thread overflow path preferably winding helically around the tube 1.
- thread guides 8 and 9 are at both ends of the heating tube 1, thread guides 8 and 9, whose offset with respect to one another determine the slope and length of the thread path. At least one of the two thread guides can be adjusted with respect to the other.
- the means required for adjusting this thread guide belong to the prior art and are not shown.
- the embodiment of the invention shown in FIG. 5 consists of a heating tube 1 which has an electrical resistance heating wire 6 in its interior and which is surrounded by a helical thread carrier 2 over its entire length.
- the screw-shaped thread carrier 2 is, for. B. firmly connected to the tube 1 by soldering. Its outward-facing surface is spherical and thread-friendly, i.e. that is, it exerts a negligible friction on an overflowing thread.
- the thread 7 is guided here in a helix which is opposite to the gears of the thread carrier 2.
- the thread is placed on the helical thread carrier 2 by means of eyelet-shaped thread guides 8 and 9, which are provided at the up and down end of the heating tube 1. As with the exemplary embodiments already described, it is possible to adjust the thread guides 8, 9 relative to one another.
- FIG. 6 A fourth embodiment of the invention is shown in FIG. 6.
- This is also a tube 1 heated by a heating resistor 6.
- the tube 1 is wrapped in a helical thread carrier 2, which consists of a flexible material that is as elastic as possible.
- the thread carrier 2 can, for example, be a metal tube, the surface of which lies against the heating tube 1 is flattened, so that there is close thermal contact between the heating tube 1 and the thread carrier 2.
- the connection between the thread carrier 2 and the outer surface of the heating tube 1 is friction conclusive, so that the pitch of the thread carrier 2, which lies helically around the heating tube 1, can be changed by one of its ends being displaceable on the outer surface with respect to the other, thereby changing the pitch and length of the thread carrier helix.
- Extensions or constrictions resulting from changes in the length of the turning ice can be adapted to the diameter of the tube 1 by adjusting the ends of the helix at the beginning of the lateral surface of the tube 1.
- the helical thread carrier 2 is shown in full lines in an extended position and in dash-dotted lines 2a in a pushed together position. Extensions or constrictions resulting from changes in the length of the turning ice can be adapted accordingly to the diameter of the tube 1 by adjusting the spiral ends on the circumference of the circumferential surface of the tube 1.
- the length of the thread overflow path on the heating tube can be changed. Since the thread guides 8, 9 provided at the run-up and run-off ends of the heating tube can also be adjusted, the increase in the thread overflow path can also be changed.
- the thread overflow heaters described here offer u. a. the advantages of allowing variable thread overrun paths within wide limits. Furthermore, by holding several differently heated thread carriers in series over the length of a thread path, variable temperature profiles can be achieved.
- FIGS. 7-9 and 11-15 show heating devices in which at the thread inlet and at the thread outlet of the heating tube 1 Input thread guide 8 and an output thread guide 9 sit, and in which the thread carriers 8, 9 and the tube 1 can be rotated relative to one another in the circumferential direction of the tube.
- the starting thread guide 9, formed by the notch 16 sits coaxially and rotatably on the lower end of the heating tube 1 and can be rotated relative to the tube in the rotating region 15.
- the running thread 7 when the starting thread guide 9 is rotated relative to the tube, the running thread 7 describes a helix on the rings 2, the geometry (winding, pitch) of which depends on the rotational position of the notch 16 on the starting thread guide 9.
- the heating tube 1 has an electrical resistance heating which is supplied with the heating current via the electrical supply lines 6a.
- FIGS. 7-9 and 11-14 show that the heating devices at the input of the heating tube 1 and / or at the output of the heating tube 1 can each have an input section 11 or end section 12 which has a greater radial distance from the passing thread 7 than the outer surface of the heating tube 1.
- control section 13 which in the present case has another special feature.
- the input thread guide 8 and the output thread guide 9 can be rotated relative to the heating tube 1, as a result of which an angular region is formed on the surface of the rings 2, which can be covered by the thread 7 as a result of the rotating region 15. This creates an area of possible contact surfaces between the thread and the rings.
- the thread 7 can consequently run at any point within the given angular range, depending on the respective rotational position of the thread guides 8, 9 and the tube 1 relative to one another.
- the rings In the angular range that can be covered by the thread 7, the rings have a ring width that changes in the circumferential direction. This means that the width B of a ring changes depending on a circumferential coordinate u according to a function B (u), which can be predetermined in each case.
- the function is linear.
- Figure 9 shows the peculiarity that the rings 2 in the possible contact area with the thread 7 in the circumferential direction have changing height H.
- the height H is a function of the circumferential coordinate u, which is accordingly designated H (u).
- the width B of the rings increases in the circumferential direction in which the height H of the rings decreases. It is therefore to be expected that with increasing contact time of the thread 7 on the rings due to the increasing ring width B, the heat flow on the thread also increases in the non-contacting longitudinal regions between the rings 2 due to the simultaneously decreasing distance between the thread 7 and the tubular jacket.
- FIGS. 7 and 8 additionally show that the rings 2 can also have a height which changes in the circumferential direction in the angular region which can be covered by the thread, if the width of the rings 2, that is to say the web width, does not change in the circumferential direction.
- the rings can also result from the fact that annular grooves are incorporated into the tubular jacket in such a way that the rings according to the invention, on which the thread 7 runs, remain standing.
- the heat transfer from the heating tube 1 to the thread 7 takes place on the one hand at the contact zones which the rings 2 hold with the thread 7 form.
- the total heat flow acting on the thread will consequently be a function of the thread path geometry set in relation to the tube geometry, because the contact lengths and the non-contact longitudinal regions, like the ring height, are dependent on the relative position of the input thread guide 8 and the output thread guide 9 the heating pipe 1.
- the invention makes use of this knowledge in the application example of a false twist texturing machine, which will be discussed further.
- rings 2 according to the invention can each be eccentric with respect to the tube axis 17, wherein the rings are advantageously offset from one another in pairs by 180 degrees.
- the heating device is symmetrical with respect to the tube axis 17, as a result of which it is suitable for machining and processing a pair of running threads 7.1, 7.2.
- FIG. 11 also shows a heating device 13, which is preceded by a supply unit 18, and that the heating device 13 is followed by a cooling zone, which is designed here as a cooling rail 19, and a false twister 20 and a supply unit 21.
- a heating device 13 which is preceded by a supply unit 18, and that the heating device 13 is followed by a cooling zone, which is designed here as a cooling rail 19, and a false twister 20 and a supply unit 21.
- FIG. 11 further shows that the input thread guide 8 and the output thread guide 9 can be adjusted relative to one another or relative to the heating tube 1 as a function of the thread temperature measured at the outlet of the heating device 13.
- a temperature sensor 22 is provided in the output area of the heating tube 1 and supplies an output signal to, e.g. to adjust the input thread guide 8 or output thread guide 9 depending on the temperature via a stepper motor 23 in each case.
- the measurement signal of the temperature sensor 22 can also be superimposed on a thread tension signal, which is generated by the tensile force measuring device 24, namely behind the heating device.
- the present invention offers the essential advantage, among other things, that the effective heat transfer from the heating device to the thread can be set extremely sensitively in the sense of process optimization, and that in addition a very precise control of the thread temperature can be carried out in order to the optimal thread quality over the entire length of the thread.
- FIGS. 12-14 also show additional exemplary embodiments of the invention.
- two thread heating zones 25 are arranged on a heating device 1 in each case in this exemplary embodiment.
- each of the thread heating zones 25 a plurality of webs 2 are fastened transversely to the thread running direction on the heated surface, the height of the webs exceeding the heated surface by at least 0.1 millimeter, but not more than 5 millimeter.
- the height of the webs 2 above the heated surface is not more than about 5 millimeters in order to be able to use the advantages of this heating device according to the invention, in particular self-cleaning and sensitive controllability, individually or simultaneously.
- the thread heating zone is convexly curved in the direction of the thread, which enables the thread to be guided over the thread heating zone on a helical line.
- the tube can be designed as a rotating body, rotating body section or rotating body segment in order to easily calibrate a thread path along a helix line.
- a filament heating zone that area of the heating device understood within which a relevant heat transfer from the heating device to the thread is possible.
- Unke filament heating zone this can also be a single filament line if, for example an adjustability of the thread path relative to the heated surface is not provided.
- FIGS. 12 and 14 and the right thread heating zone according to FIG. 13 show, this can also be an angular range within which a thread can be guided relative to the heated surface.
- the synchronous mobility can be easily achieved via a corresponding gear.
- a corresponding gear is part of the prior art and will not be explained here in detail.
- the width B of the rings may also be possible to gradually change the width B of the rings.
- the width B is piecewise constant and increases gradually at certain circumferential coordinates, for example from a smaller width to a larger width.
- rings of variable width and / or height are offset in the circumferential direction in such a way that, in anticipation of the possible thread path, the respectively effective contact zones enable essentially the same contact times or thread spacings to the outer jacket of the tube.
- a step-by-step changing ring height H is easy to implement if one provides rings which have sectors with a constant radius per sector.
- the transition area between two adjacent sectors of different radii is then to be designed in a thread-friendly manner, ie abrupt or angular changes in the respective ring radius to the adjacent ring radius must be rounded in the circumferential direction accordingly in order to prevent damage to the thread. avoid.
- FIG. 15c One of the most effective possibilities with regard to adjusting the thread path is shown in FIG. 15c, where one of the threads 7 runs exclusively within a quadrant spanned between the long semiaxis and the short semiaxis of the ellipse.
- the heat transfer from the heating tube 1 to the thread increases or decreases continuously over the entire length of the thread between the input thread guide 8 and the output thread guide 9.
- Output thread guide 9 thus enables extremely effectively controllable heat transfer, since the entire area of the web 2 between the minimum distance in the area of the small semi-axis of the ellipse and the maximum distance in the area of the large semi-axis of the ellipse.
- the optimally possible heat transfer can therefore be expected with a certain relative position between the input thread guide 8 and the output thread guide 9, in which case a continuously increasing heat transfer from the tube to the thread is made possible.
- two opposing locations of the ellipses are therefore to be understood as meaning two circumferential regions of the ellipse which are diametrically opposed with respect to the intersection of the long and short ellipse axes.
- FIGS. 15d and 15e also show webs 2 arranged eccentrically.
- the webs 2 are circular, the center of the circle of the web 2 being offset by the eccentricity 27 with respect to the center of the circle of the heating tube 1.
- the input thread guide and the output thread guide are arranged separately for each thread on a thread carrier lever 26, namely rotatable circumferentially with respect to the center of the ring 2 in the sense of the same effect on the heated thread.
- FIG. 15e shows the one rotated by 180 degrees 15d represents the situation, an optimal influence of the heat transfer from the heating tube 1 to the thread 7 can be calibrated in this way:
- the incoming thread is heated relatively strongly in the area of the input thread guide 8, since it is at a very short distance from the heated surface of the heating tube 1, while the outgoing thread is at a relatively large distance from the heated surface in the area of the exit thread guide 9 .
- the rings provided according to the invention can be used to drive self-cleaning temperatures on the heated surface without any problems, while the temperatures which act on the thread enable damage-free heating. Furthermore, the invention enables filament yarns of different titers, for example 20 den. or 40 den. to be processed with the same heating device and at the same time, provided the relative position between the running thread and the heated surface is set accordingly.
- FIGS. 16 to 18 The following description of the figures relates in particular to FIGS. 16 to 18. Where the figures require a special description, this is expressly noted.
- the heating device is preferably used in a false twister crimping machine.
- a false twist crimping machine is e.g. B. in DE-PS 37 19 050 and consists of a plurality of supply spools, from which a plurality of threads are withdrawn, from heating devices over which each thread is guided, from cooling devices over which each thread is guided, from one False twist, through which each thread receives a temporary twist, as well as from input and output supply units that pull the thread from the delivery spools or pull it out of the false twist. Then each thread is on a take-up spool spooled.
- the heating devices shown relate to the previously described heater arranged in the false twist zone.
- the heating devices 30 shown are tubular.
- the thread 7 is first passed through an input thread guide 8 and then reaches the circumference of the tube.
- the thread is guided with axial and peripheral components through an exit-side thread guide 9 over the tube.
- the thread guide 9 is a disk which can be rotated about the tube axis and has a thread guide notch 16.
- FIGS. 16 and 18, an aligned position of the input thread guide 8 and the notch 16 is shown in a simplified manner.
- Fig. 17 shows - applicable also to the embodiment 18 - that the disc 9 is rotated so that the thread - as I said - is guided with axial but also with peripheral components over the tube and thereby describes a steep helix.
- the looping of the thread on the tube can be adjusted in the circumferential direction.
- the wrap is equivalent to a curvature of the thread.
- the loop can therefore achieve the entire contact of the thread on the tube or on the thread carriers attached to the tube. This thread carrier is discussed below.
- the heating device consists of three sections, namely the input section 11, the control section 13 and the end section 12.
- the thread is guided through the input thread guide 8 and the first thread carrier 31.1 of the control area 13 via the input section 11.
- the heating surface facing the thread ie the jacket of the input section 11 is at a distance from the thread which is a multiple of the distance that the thread is from the heating surface, that is to say that between the thread carriers 31 Shell areas of the control section.
- the distance between the thread carrier 8 and the first thread carrier 31.1 of the control range is also a multiple of the distance between the thread carriers in the control range. Lengths of up to 500 mm can be accepted here. The length is strongly dependent on the tendency to vibrate.
- the length of the input section 11 is preferably chosen to be shorter, so that an efficient preheating of the thread is possible.
- the heating device is heated by a resistance heater in the form of a heating tube 1. With 6a the electrical leads of the resistance heater are designated.
- the resistance heater is designed as a heating cartridge 1 and extends over the entire length of the heating device, that is to say over the input section 11, the control section 13 and the end section 12.
- the temperature control of the heating device comprises a temperature sensor which detects the effective actual temperature of the control range 13. This temperature is regulated.
- the control range therefore has a very precise temperature control.
- a plurality of thread carriers 31 are arranged in the control region 13. All of these thread carriers 31, including the first thread carrier 31.1, are designed as webs which extend over the circumference of the control section. These webs have a certain, predetermined distance and a certain height above the remaining jacket area of the control area 13. The number of thread carriers is determined by the tendency of the thread to vibrate and the heat transfer.
- the height of the webs in relation to the jacket of the control area is preferably chosen to be low and is a maximum of 3 mm. It is preferably in particular less than 1.5 mm.
- the thread is guided over the outer circumference of the thread carrier.
- the thread touches the outer circumference over a certain length. This length is also decisive for the heat transfer.
- this contact length is chosen to be short, a compromise with the requirements of heat transfer being necessary.
- the axial distance between the thread carriers also has an influence on the heat transfer.
- a ratio of contact length to thread carrier distance of up to approximately 1 to 5 can be used, but this ratio is preferably smaller, in particular less than 1 to 10.
- the distance from the heating surface, i.e. H. of the jacket of the entrance area is 3 to 10 times the height of the webs 31 compared to the jacket of the control area, but is preferably less than 10 times.
- the representations of the drawing are not to scale.
- the thread is in turn passed through only a few thread carriers, namely here through the end thread carrier 31.3 of the control range and the disk 9 already mentioned at the beginning with its thread guide notch 16.
- the distance between the thread path and the jacket of the end section 12 is again a multiple greater than the height of the thread guide webs 31 in relation to the casing of the control area, the same dimensioning rules as for the input area 11 being valid here.
- the distance between the thread carriers in the end section is smaller than in the entrance section. cut.
- the thread carrier distance is 300 mm and is preferably smaller.
- the heating device shown is enclosed in practice in an insulating cage which has a radial slot for thread insertion and which forms a circumferential gap with respect to the control region of the tube.
- the thread is guided in this circumferential gap. It is also possible to heat two threads on a heating device by arranging a pair of input thread guides 8 and thread guide notches 16 in the disk 9.
- the input thread guide 8 has as far as possible no contact with the heating device. This makes it easier for the thread carrier 8 not to heat up. The deposits that form when the thread is heated do not therefore form on the thread carrier 8.
- the output thread guide of the input section 11 is - as already mentioned - designed as the first thread carrier 31.1 of the control section 13. As with the other thread carriers 31.1, 31.2, 31.3 of the control section, these are - as said - webs. These webs are worked out from the jacket of the control area. You therefore have good heat-conducting contact with the heating device. Their low height ensures that the control temperature also prevails in the contact surfaces. This ensures that the heater temperature, which is above 300 ° C and is chosen so high that cracking and burning of the remaining thread remains, also exists in the contact surfaces of the webs 31.1, 31.2, 31.3. Therefore, these thread carriers have good self-cleaning properties.
- the thread carrier on the output side ie disc 9 with thread guide notch 16 is rotatably arranged on the cartridge 1 of the heating device. This ensures that the temperatures of the heating cartridge 1 are also communicated to the disk 9, so that here too with good results Self-cleaning properties can be expected.
- the embodiment according to FIG. 18 has a special feature in the circumferential configuration of the webs 31.1, 31.2 serving as thread carriers. and possibly 31.3.
- the webs have an increasing axial extent in the circumferential direction. The narrowest point does not lie on exactly one surface line, as could be seen in FIG. 18, but essentially on a line which is essentially parallel to the overflow line of the thread. This thread overflow line can be changed. An overflow line corresponding to the normal operating conditions must be selected here. Then in Fig. 18 not only the starting thread guide in the form of the disk 9 with thread guide notch 16 but also the thread guide 8 can be rotated about the axis of the heating device.
- the thread run can be displaced on the circumference of the heating device, in an area in which the contact length of the thread guide webs 31 has a desired dimension and in which there is a desired ratio of contact length to free guide length between the webs. This can influence the heat transfer, but also the running smoothness of the thread. On the other hand, too long a contact length leads to high thread friction, which is undesirable to protect the thread.
- FIG. 19 shows the blank 32 of a sleeve 33 in the rolled-out state, in which recesses 34, 35, 36, 34 ', 35' and 36 'are lined up.
- the recesses of a respective row are of the same shape and are at the same distance from one another. Between the recesses there are connecting webs 37, 38, 39, 37 ', 38' and 39 'which run transversely to the blank and are discussed in more detail below.
- the in the longitudinal direction of the Blanks 32 running connecting webs between the respective rows of recesses are irrelevant to the essence of the invention.
- the blank 32 can be Fig. 19 formed into a hollow cylinder and pulled as such onto a heating tube 1.
- the inside diameter of the hollow cylinder corresponds to the outside diameter of the heating pipe.
- the cylinder hereinafter sleeve 33, is secured against axial displacement on the heating tube 1, but can be rotated thereon, the rotary movement possibly being dependent on the release of a lock which is known but not shown.
- the recesses 34 lie in a row lying parallel to the axis of the heating tube 1 and form webs 37 of the same width between them.
- the webs 37 serve as overflow webs for a thread 7 (which, unlike shown here for simplification, runs helically around the cylinder) and are of equal width.
- the fact that the sleeve 33 can be rotated on the heating tube 1 offers the possibility of running the thread 7 in the circumferentially extending region of the webs 32 in each case over a clean location, which makes it possible in accordance with the temperatures mentioned above given the self-cleaning effect of the webs is further increased.
- the row of recesses 34 'shown in FIG. 16 lies diametrically opposite the recesses 34 and serves as a thread track for a second thread 7'.
- Row of recesses 35 shown here trapezoidal, between which there are wedge-shaped webs 38. This row diametrically opposite is the same arrangement of trapezoidal recesses 35 'or wedge-shaped webs 38'. This makes it possible to change the length of the heating surfaces in contact with the thread by simply turning the sleeve 33 on the heating tube 1.
- recesses 36 arranged in a row is provided. These are recesses which are relatively narrow in the axial direction, but leave wide connecting webs 39 between them which, as thread overflow webs, offer a thread 7 a larger heating surface. Corresponding to the other recesses, a row of recesses 36 'diametrically opposite them is also provided in the case of the recesses 36 with corresponding webs 39' which form a second thread overflow path.
- the radial distance between the outer surface of the heating tube 1 and the surface of the webs corresponds to the dimensions given above, that is to say in the preferred range of 0.5-5 mm, preferably 0.5-3 mm.
- the cuff 33 can be provided with recesses of a different shape that meet the respective working conditions.
- FIGS. 21 and 22 Further embodiments of the invention are shown in FIGS. 21 and 22. These embodiments have in common that the tubes 1 carrying the thread overflow webs or rings 2 are composed of sections 1 '.
- the sections 1 'each consist of a part 1'a of larger diameter and a part l'b of smaller diameter, the latter corresponding to the inside diameter of part l'a with a larger outside diameter.
- threads G are cut into the inner lateral surface of part 1'a with the larger outside diameter and into the outer lateral surface of part 1'b with the smaller outside diameter, with which the individual pipe sections 1 'can be connected to one another.
- the screw connections can be secured by lock nuts K, as a result of which the position of the sections 1 'relative to one another can be set precisely.
- a thread carrier 2 is provided on the outer circumference of the section parts 1'a with the larger diameter, which can be designed in accordance with the exemplary embodiments described above, but is shown schematically in FIG. 21 as a simple ring 2.
- the ring 2 can coaxially enclose the part 1a, but it can also be arranged off-center. It can inhibit a uniform width around its entire circumference or have gradually or intermittently increasing widths.
- the outer surface of the ring 2 can be interrupted by at least one axial groove 2 ', so that by setting the rings 2 accordingly, in addition to the distances between the rings 2 on the tube 1, zones arise which are not touched by an overflowing thread 7.
- this embodiment of the invention offers the advantage that thread contact lengths and contact-free zones can be varied within wide limits by rotating the tube sections 1 'depending on the width of the individual rings 2 and their distance from one another.
- FIG. 22 differs from that according to FIG. 21 in that instead of the stepped pipe sections 1 'internal and external sleeves 1 "are provided, which are screwed together via external or internal thread G and optionally with lock nut K
- this embodiment also applies to the heating device and its thread carriers, taking into account their design, what has been said in relation to the other embodiments.
- the present invention enables the optimal use of self-cleaning properties of a heating device with good heating behavior, in particular in false twist crimping machines.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4228129 | 1992-08-25 | ||
DE4228129 | 1992-08-25 | ||
DE4242160 | 1992-12-15 | ||
DE4242160 | 1992-12-15 | ||
PCT/EP1993/002273 WO1994004733A1 (de) | 1992-08-25 | 1993-08-24 | Einstellbare heizeinrichtung für einen laufenden faden |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0656963A1 true EP0656963A1 (de) | 1995-06-14 |
EP0656963B1 EP0656963B1 (de) | 1999-07-28 |
Family
ID=25917834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93919156A Expired - Lifetime EP0656963B1 (de) | 1992-08-25 | 1993-08-24 | Einstellbare heizeinrichtung für einen laufenden faden |
Country Status (7)
Country | Link |
---|---|
US (1) | US5822971A (de) |
EP (1) | EP0656963B1 (de) |
JP (1) | JP3440272B2 (de) |
KR (1) | KR950703086A (de) |
DE (1) | DE59309708D1 (de) |
RU (1) | RU2090674C1 (de) |
WO (1) | WO1994004733A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1998000588A1 (de) * | 1996-06-28 | 1998-01-08 | Zinser Textilmaschinen Gmbh | Vorrichtung zum herstellen von dick/dünn-effekten in einem filamentgarn |
CN102978726A (zh) * | 2012-12-03 | 2013-03-20 | 吴江市东飞化纤有限公司 | 一种纱线烘干装置 |
US20140261242A1 (en) * | 2013-03-15 | 2014-09-18 | Htp, Inc. | Corrugated indirect water heater coil |
CN103451792A (zh) * | 2013-09-11 | 2013-12-18 | 昆山市巴城镇顺拓工程机械配件厂 | 一种粗羊绒纤维整形夹具 |
US20190330766A1 (en) * | 2018-04-28 | 2019-10-31 | Dennis Joseph Steibel, JR. | Apparatus for removing moisture from a section of polymer filament |
CN113186626A (zh) * | 2021-04-30 | 2021-07-30 | 义乌市金明针织有限公司 | 一种加弹机的温度调节装置 |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1303384B (de) * | ||||
BE567120A (de) * | 1957-04-25 | |||
US3420983A (en) * | 1966-09-21 | 1969-01-07 | Henry W Mccard | Rotating drum heater for synthetic yarn |
GB1275270A (en) * | 1968-07-23 | 1972-05-24 | Teijin Ltd | Apparatus for heating synthetic filaments |
US4027467A (en) * | 1976-06-04 | 1977-06-07 | Smith Joseph F | Uniroll false twist device and method |
SU866015A1 (ru) * | 1977-11-21 | 1981-09-23 | Институт технической теплофизики АН УССР | Устройство дл тепловой обработки нити |
US4567721A (en) * | 1983-11-01 | 1986-02-04 | Teijin Limited | Method for producing textured yarn |
EP0332227B1 (de) * | 1983-11-01 | 1992-02-26 | TEIJIN SEIKI CO. Ltd. | Berührungsloser Heizapparat für das Erwärmen eines synthetischen Garnes |
DE59007713D1 (de) * | 1989-08-09 | 1994-12-22 | Barmag Barmer Maschf | Heizeinrichtung. |
US5138829A (en) * | 1990-02-10 | 1992-08-18 | Teijin Seiki Co., Ltd. | Apparatus for heat treating a synthetic yarn |
GB9023549D0 (en) * | 1990-10-27 | 1990-12-12 | Rieter Scragg Ltd | Yarn heating arrangement |
JP3164180B2 (ja) * | 1992-07-24 | 2001-05-08 | 帝人製機株式会社 | 合成繊維糸条の熱処理装置 |
US5578231A (en) * | 1992-06-06 | 1996-11-26 | Barmag Ag | Heater for an advancing yarn |
EP0705925B1 (de) * | 1994-10-07 | 2001-06-13 | B a r m a g AG | Heizeinrichtung mit auswechselbaren Fadenführern |
-
1993
- 1993-08-24 WO PCT/EP1993/002273 patent/WO1994004733A1/de active IP Right Grant
- 1993-08-24 KR KR1019950700727A patent/KR950703086A/ko not_active Application Discontinuation
- 1993-08-24 DE DE59309708T patent/DE59309708D1/de not_active Expired - Fee Related
- 1993-08-24 US US08/392,822 patent/US5822971A/en not_active Expired - Fee Related
- 1993-08-24 JP JP50592194A patent/JP3440272B2/ja not_active Expired - Fee Related
- 1993-08-24 RU RU9395106602A patent/RU2090674C1/ru active
- 1993-08-24 EP EP93919156A patent/EP0656963B1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9404733A1 * |
Also Published As
Publication number | Publication date |
---|---|
KR950703086A (ko) | 1995-08-23 |
WO1994004733A1 (de) | 1994-03-03 |
EP0656963B1 (de) | 1999-07-28 |
DE59309708D1 (de) | 1999-09-02 |
US5822971A (en) | 1998-10-20 |
RU95106602A (ru) | 1996-11-10 |
JPH08500639A (ja) | 1996-01-23 |
JP3440272B2 (ja) | 2003-08-25 |
RU2090674C1 (ru) | 1997-09-20 |
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