EP0022552A1 - Appareil pour conférer une torsion ou une fausse torsion à un fil composé de plusieurs filaments - Google Patents

Appareil pour conférer une torsion ou une fausse torsion à un fil composé de plusieurs filaments Download PDF

Info

Publication number
EP0022552A1
EP0022552A1 EP80103908A EP80103908A EP0022552A1 EP 0022552 A1 EP0022552 A1 EP 0022552A1 EP 80103908 A EP80103908 A EP 80103908A EP 80103908 A EP80103908 A EP 80103908A EP 0022552 A1 EP0022552 A1 EP 0022552A1
Authority
EP
European Patent Office
Prior art keywords
belt
pressure
thread
pressing
run
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
Application number
EP80103908A
Other languages
German (de)
English (en)
Other versions
EP0022552B1 (fr
Inventor
Heinz Dr. Dipl.-Ing. Schippers
Karl Dr. Dr.-Ing. Bauer
Peter Dipl.-Ing. Dammann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Barmag AG
Original Assignee
Barmag Barmer Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE19792928522 external-priority patent/DE2928522A1/de
Priority claimed from DE19792952305 external-priority patent/DE2952305A1/de
Application filed by Barmag Barmer Maschinenfabrik AG filed Critical Barmag Barmer Maschinenfabrik AG
Publication of EP0022552A1 publication Critical patent/EP0022552A1/fr
Application granted granted Critical
Publication of EP0022552B1 publication Critical patent/EP0022552B1/fr
Expired legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/085—Rollers or other friction causing elements between crossed belts
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/087—Rollers or other friction causing elements between the flanks of rotating discs

Definitions

  • the invention relates to a device for applying a twist to a fiber bundle, in particular a false twist in connection with a heat treatment for producing crimped, synthetic threads according to the preamble of claim 1.
  • the invention relates to the pressing of circumferential and crossed friction surfaces that are set against the circumference of a textile thread (fiber bundles or synthetic multifilaments) running between them with a narrow gap in order to clamp the thread and to twist and drive it by friction contact. Therefore, the design of the pressing device in connection with such devices for texturing textile threads with at least one friction surface formed by an endless, flexible belt or belt run for twisting the thread is the subject of the invention.
  • CH-PS 278 535 A device of the type mentioned above with flat, crossed bands is described in CH-PS 278 535. A further development of the device is known for example from US Pat. No. 2,863,280, US Pat. No. 2,991,614 or from DE-OS 26 28 396.
  • the invention has for its object to improve the texturing result and the uniformity of the rotation distribution, the pressure of the frictional contact on the thread circumference friction surfaces, such as tape runs or the like., In the thread pressing zone easier and more effective.
  • the solution found has the advantages that the pressing device has no stretching and accelerating components, so that the pressing forces in a thread pressing zone lying in the running direction of the thread and adjustable in its geometrical dimensions are low-inertia and low-friction on the friction surface with which the pressing device interacts , can be transmitted non-positively.
  • the pressing device has a pressing die with a pressing surface defining the thread pressing zone. This is pressed against the back of the belt or belt run and lubricated to reduce the friction, in particular by an aerodynamic lubricating film or by an aerostatic pressure fluid cushion generated between the pressure surface of the pressure stamp and the belt or belt run. As a result, the contact between the interacting surfaces is interrupted and both the heating and the wear on one or both surfaces are prevented, although at the same time there is an effective, non-positive transmission of the pressing forces on the friction surface and thus a clamping of the thread.
  • such a pressing device is largely insensitive to unevenness in the belts or belt runs and, because of the compressibility of the pressure fluid cushion, absorbs shocks better than the known pressing rollers or pressing rollers with a non-compliant surface.
  • the surface quality of the back of the endless belts or belt runs can therefore be less stringent than when using idler support rollers after State of the art.
  • the pressing device is fixed in place by a holder on the false twist crimping machine. Its pressure ram can be mechanically adjusted in the thread pressing zone opposite the back of the belt or belt run, for example by means of a thread that can be moved in an adjusting nut. However, the pressure plunger can preferably be resiliently adjusted against the belt or belt run by a force transmitter. This has the advantage that the pressure ram always remains non-positively pressed.
  • a cylinder-piston unit which is acted upon by a liquid or gaseous pressure fluid, serves as the force generator.
  • the contact pressure can also be applied by a spring, a weight or a magnet or the like.
  • the piston of the cylinder-piston unit is penetrated in the axial direction by a longitudinal channel which leads from the pressure chamber to the pressure surface of the pressure ram in order on the one hand to exert a desired pressure force on the pressure ram and on the other hand to supply the lubricating air needed to lubricate the pressure surface there.
  • the pressing surface itself can be oval, round or ring-shaped, and the channel can open into a plurality of openings, bores or slots or a porous zone of a flat pressing surface or into an air cushion chamber which is open at the end and delimited by a sealing surface on the circumference.
  • the thread twisting line can be adapted to the conditions of the false twist texturing device, for example the selected crossing angle of the belt clamping and twisting belts or belt runs, by means of a suitable geometric shape of the pressing surface of the pressing die .
  • the force effect of the pressure ram can simply be applied to the desired parameters of the texturing process, for example the thread titer Rotation height, the belt and thread speed can be adjusted by controlling the fluid pressure and the amount of lubricating air.
  • the pressure ram as an insert body made of a material with a low coefficient of friction.
  • the insert body, the end pressure surface of which geometrically defines the thread pressing zone, can be porous in this case and can be lubricated by a suitable gaseous or liquid pressure fluid via a longitudinal bore in the piston of the cylinder-piston unit in order to reduce friction and wear.
  • the other, moving friction surface interacting with the endless belt or belt run be rigid, i. H. is unyielding or quasi inelastic and is present as the end or ring surface of a rotatably driven, flat or plate-shaped disk or as the outer surface of a rotatably driven roller.
  • it is arranged so that it can pivot and its angle of intersection with respect to the thread path can be adjusted.
  • the belt run can be adjusted with respect to its crossing angle in relation to the thread run.
  • the advantage of this arrangement lies in the reduction in construction costs and the lower susceptibility to faults, since the flexible friction surface is eliminated and therefore only a single pressing device and the work equipment required for its operation, such as compressed air etc., are required for each texturing unit.
  • the number of belt runs which are tiring and possibly have to be replaced due to the stress during a longer operating time is also reduced, as a result of which the effort for eliminating faults and failures of the units in the production process is reduced.
  • the stiff roller is either cylindrical or frustoconical. To adapt to an optimal thread clamping line, it can also be designed as an exact or approximate rotary hyperboloid.
  • the geometric shape of the surface of the rotary hyperboloid is preferably based on the mean crossing angle between the working surfaces provided during texturing, and the pressing surface of the pressing die is adapted accordingly and is convexly curved against the thread path.
  • An advantageous arrangement of the false twisting devices in the construction of a twisting or texturing machine is characterized in that the rigid rolls of a plurality of work stations are arranged coaxially with one another and are driven together by a shaft that preferably extends over a field or the entire length of the machine. This simplifies the storage and in particular the drive of all friction units.
  • the flexible belt runs must be individually adjustable with respect to their respective crossing angle relative to the direction of movement of the rolls in the thread pressing zone.
  • the thread guides in front of and behind the friction units are also arranged in such a way that they guide the thread essentially on the bisector of the crossing angle ⁇ between the interacting friction surfaces.
  • the behavior of the friction surfaces in the event of a thread break has proven to be the critical operating state of the friction false twist device.
  • - due to the lack of a thread between the mutually pressed friction surfaces they come into direct frictional contact with one another, so that strong heating occurs and they wear out quickly due to the high relative speeds.
  • the sensitive belt edges come into contact with each other. If they wear, the thread run is disturbed and unstable. The uniformity and the quality of the crimped threads produced is considerably deteriorated.
  • the friction surfaces of the belts or belt runs are designed to be convex perpendicular to their running direction or are deformed convexly by the pressing device towards the thread, so that between the friction surface of one belt or belt run and the one with their cooperating counter surface in the area of the thread clamping line a wedge-shaped gap is formed.
  • Such warping by means of which the strappy edges are lifted off from the thread and thus the twist is independent of the state of the strappy edges, can be achieved by using endless straps with a convexly curved cross-section of the friction surface clamping the thread or by a convex deformation towards the thread of an endless flat strap.
  • the wedge-shaped gap formed between the friction surfaces Touching the friction surfaces is excluded, so that wear on the surfaces could not be determined even during prolonged operation of the device. It was found that the wedge-shaped gap caused by the accumulation of the boundary layers of the ambient air carried on the friction surfaces has such a supporting effect that this is sufficient, for example with a thread of 167 dtex and working speeds above 600 m / min, to also prevent wear of the friction surfaces , if the pressure device is not switched off automatically when the thread breaks.
  • a thread monitor actuates a signal via a control valve in the supply line for the pressure fluid to the pressing device and blocks the further pressure fluid supply.
  • the pressure ram of the cylinder-piston unit can be pushed back into its initial position, for example by spring force or by another force transmitter, so that it lifts off the back of the friction surface.
  • claim 25 relates to the use of the false twist texturing device in connection with the fluid dynamic pressure device for the production of effect threads by changing the fluid pressure.
  • the false twist texturing device according to the invention can be used particularly easily and advantageously also for the production of different types of fancy yarns by For example, the surface speed of the friction surface is varied according to a predefinable program.
  • the fluid pressure is changed with regard to a pressing device with a piston with a pressing plunger pressed against a pressure fluid, as a result of which the slip between the thread and the friction surface can be influenced.
  • the belt runs 1, 2 consist of the flat belts or flat belts 11 and 12 stretched between the deflection rollers 7 and 8 or 9 and 10, which are moved in a circumferential manner, which are positioned against one another with a narrow gap 13 and the fiber bundle 14 between the weakly wrapping friction surfaces clamp and drive on the circumference to apply a rotation, in particular a false twist, in the fiber bundle.
  • the belt runs or endless belts are narrower than the deflection or drive rollers.
  • the mode of operation of the device in which the twist is imparted by direct frictional contact between two friction surfaces engaging the thread circumference and in which the fiber bundle is additionally conveyed in the thread running direction with a speed component dependent on the crossing angle 0C of the belt runs, is known per se and is not itself the subject of the invention.
  • the pressure device 5 is shown enlarged in modified designs in FIGS. 3 and 4.
  • it consists of the two cylinder-piston units 15, arranged on the inside of the belt runs in the area of the thread pressing zone 3, as force transmitters or tracking devices, which, with their plungers 18 firmly connected to the pistons 16, are fluid-controlled essentially vertically act on the back of the belts or flat belts 11, 12 and press them locally against the run of the fiber bundle 14.
  • the cylinder-piston units 15 are connected via feed lines 19 to a fluid source, not shown, preferably compressed air.
  • the ones from Pistons 16 pressurized with fluid are guided in the cylinders 17.
  • the compressive force of the piston 16 is transmitted to the piston rods 21 via intermediate layers 20 made of elastic and vibration-damping material, so that vibrations due to unevenness in the belt runs 1 and 2 or the fiber bundle itself are damped.
  • the pistons 16 are connected by piston rods 21 to stamp carriers 22, which are glued to the stamps 18, for example. Tilting of the stamp 18 or insert body with increasing wear is prevented by a sufficiently long guidance of the piston rod 21 and the stamp carrier 22 in cylinder 17.
  • the thread pressing zone 3 (FIG. 1) can be geometrically determined by the design of the pressing surface of the stamp 18 and - depending on the optimal conditions - selected depending on the width and the crossing angle ⁇ of the belt runs 1, 2 .
  • a narrow, for example oval thread pressing zone 3 is expedient in order to keep the wear between the punch 18 and the belt 11 or 12 low and at the same time to transmit a defined pressing force to the fiber bundle 14.
  • the stamp or insert body 18 can be made of graphite in order to keep the frictional output low.
  • a sintered graphite insert is preferred, which is used to improve heat dissipation with metallic particles made of bronze, copper or the like. is enforced, provided.
  • it can also be an insert body which consists of open-pore material and is enriched or impregnated with a suitable lubricant.
  • the pressing device is shown offset by 90 ° compared to FIG. 3a, in order to underline the geometrically free design possibility of the pressing zone 3 with different length and width dimensions of the stamp 18.
  • a gaseous or liquid lubricant is supplied to the open-pore, sintered stamp 18 or insert body through an axial longitudinal bore of the piston rod 21 and the stamp carrier 22.
  • This lubricant can be, for example, a partial flow of the pressure fluid with which the cylinder-piston unit 15 is acted upon.
  • a liquid lubricant can also be added to the gas stream in a fine distribution, for example as a lubricating mist.
  • a cylinder-piston unit 15 of the pressing device in which a solid metallic insert body 23 is fastened to the punch carrier 22 as a pressing punch, similar to a slide bearing segment, which has longitudinal edges parallel to and opposite the guide in the cylinder 17 the belt run has a wedge-shaped pressure surface 24.
  • the pressing surface has a recess, the height of which - seen in the running direction of the belt 12 - decreases and which is laterally limited.
  • the insert body 23 is made of a highly wear-resistant material.
  • a lubricant, preferably water, a preparation which is harmless to the fiber bundle 14 or a suitable oil emulsion can be metered through a nozzle 25 onto the inside of the belt 11 or 12.
  • the false twist texturing device shown in FIGS. 5 and 6 differs from the one described above in the construction of the pressing device 6, in which the pressing forces are transmitted according to a preferred embodiment of the invention by means of a pressure fluid cushion.
  • a pressure fluid cushion Here there is an aerostatic lubrication between the pressure surface of the with the force sensor connected stamp and the back of the belt or band 11 or 12 in front.
  • the structure and the mode of operation of this pressing device 6 will be discussed in detail elsewhere in the description of the drawings.
  • a circumferentially moving belt run 26, corresponding to FIGS. 1 and 2 or 5 and 6, is combined with a circumferentially driven, rigid, ie, unyielding disc 27, which is seen from above and in Cross section is shown.
  • the belt or the flat belt 11 of the belt run is pressed against the fiber bundle 14 and the flat or with an end face annular disc 27 by a pressing device 6 in order to clamp and twist it on the circumference and in the running direction (arrow) of the fiber bundle 14 to promote.
  • the cylinder-piston unit used as a force generator for the pressing device 6 is held by a holder 28, through which compressed air is supplied for aerostatic lubrication of the pressing surface of the stamp.
  • the pressing device also acts on the flexible flat belt 11 and presses it locally in the thread pressing zone 4 against the fiber bundle 14 or the rigid pulley 27.
  • the fiber bundle 14 is fed by a thread guide 29 which is inclined to the plane the friction surface defined by the rigid disc is arranged.
  • FIG. 9 shows a top view
  • FIG. 10 shows the side view of a further exemplary embodiment, in which the false twist texturing unit consists of a belt run 102 and a roller 103 or roller rigidly formed on its peripheral surface, the working surfaces acting together on the fiber bundle 14 having an adjustable crossing angle OC to each other.
  • the belt 102 or an endless flat belt made of a suitable synthetic rubber or plastic material is stretched between the two deflection rollers and driven by one of the two rollers 100 or 101.
  • the roller or roller 103 can be driven in any manner, for example by a belt drive, a direct electric drive or also by a friction drive.
  • the belt or belt run 102 is locally in the thread pressing zone 4 against the circumference of the thread bundle 14 and against the circumferentially driven outer surface of the roller 103 or by a pressure device 6 acting on its inner surface, which will be described in detail later Roller pressed.
  • the pressing device is designed as a cylinder-piston unit with a plunger, the piston of which is acted upon by a pressure medium, in particular compressed air.
  • FIG. 10a shows a modified design of the roller 1030 as a rotating hyperboloid.
  • the crossing belt run 102 - as indicated in cross section 1020 in FIG. 1 - is locally deformed by a convexly curved end face of the stamp of the pressing device 6 and pressed against the fiber bundle 14 and the outer surface of the roller 1030.
  • Fig. 11 shows a modification of FIGS. 9 and 10, a false twist texturing unit from a belt run 104 and a rigid roller 107, in which the two rollers 105 and 106 are so large in diameter that the cylindrical Roller 107 can be arranged in the space enclosed by the two deflecting rollers and the driven belt or endless belt 104 that wraps around them, while the pressing device 6 is provided outside the belt or belt run 104 and its friction surface is pressed locally against the fiber bundle 14 and between the outer surface the unyielding roller 107 and the belt 104 twist.
  • FIG. 12 shows several false twist texturing units of the type shown in FIGS. 9 and 10 schematically as a section of a field of a false twist texturing machine.
  • all the rollers 103 are arranged coaxially to one another on a common drive shaft 108 and driven synchronously.
  • the individual belt runs 102 are arranged next to one another and above the rollers 103 at a distance which corresponds to the narrowest machine division and are pressed against the threads 14 fed by thread guides 109 and 110 at half the crossing angle between the work surfaces by means of individual pressing devices (not shown).
  • the apron or belt assemblies 102 are individually pivotable with respect to the rollers 103.
  • the rear thread guide 109 can also be moved parallel to the drive shaft 108 of the rollers 103 in such a way that the thread 14 is guided along the intended thread clamping line between the friction surfaces and essentially on the bisector of the crossing angle (k) after a change in the crossing angle.
  • FIGS. 13 and 14 a false twist texturing unit, similar to FIG. 5 with two crossing belt runs, is shown again to explain a further embodiment of the invention.
  • the reference numbers of the upper belt run, on which the pressing device 6 acts to clamp the thread 14, correspond to the reference numbers in FIGS. 5/6, since there is essentially a match between the technical design.
  • the lower belt run 111 with the rollers 112 and 113 crosses the belt run 1 and is in
  • the center distance L between the two deflection rollers 112 and 113 is proposed to make the center distance L between the two deflection rollers 112 and 113 as small as is technically expedient, in order to thereby also have a higher rigidity in the belt run 111 and less deflection due to the stamp of the pressing device 6 acting on the belt run 1 or a larger elastic one and to achieve a reaction force (restoring force) directed counter to the pressing force of the force transmitter for the purpose of clamping the fiber bundle.
  • a similar increase in the rigidity of the belt run 111, for which a second pressing device is unnecessary, is obtained by arranging a freely rotatably supported support roller 116, shown in dashed lines in FIG.
  • This support roller 116 can additionally be pressed against the inside of this belt run by a force transmitter (not shown) in the sense of tensioning the belt run 111.
  • This corner angle ⁇ at the belt run should be in the cross-strap unit shown in the range between 1 ° and 6 °, preferably in the range between 2 ° and 4 0 .
  • the tensile force in the tightly tensioned tape run 111 and with about 60 to 75% of this value the tensile force in the softer tensioned tape run 1 can be calculated.
  • the tension springs 114 and 115 can then be dimensioned accordingly with these values.
  • the false twist texturing device shown schematically in FIGS. 15 and 16 essentially consists of the overflow rollers 200 and 201 for the first belt run 202 and the overflow rollers 203 and 204 for the second belt run 205.
  • Both belt runs preferably endless belts, are arranged in such a way that they enclose the crossing angle ⁇ , which can be adjusted symmetrically to the thread run, and are driven in an essentially opposite direction with respect to the thread 14 clamped between the friction surfaces of the endless belt (cf. arrow direction in FIG. 16).
  • the endless straps of the belt runs 202 and 205 according to FIG. 15 are wider than the overflow rollers, so that their longitudinal edges protrude on both sides of the overflow rollers.
  • the flexible flat straps are pulled over the end faces of the overflow rollers, the working surfaces being deformed convexly towards the thread 14.
  • the belt runs are pretensioned by the tension springs 114 and 115 in FIG. 16, of which one tension spring 115 has a higher spring force than the tension spring 114 by thus preloading the endless strap 205 more strongly and thereby giving it a harder sag characteristic from the cable corner condition.
  • the other endless belt 202 is pressed locally by a pressure device 206 from its rear in the region of the pressure zone, as a result of which the fiber bundle 14 is clamped between the friction surfaces and the desired twist is introduced.
  • the pressure zone is defined by the pressure surface 210 of the pressure device 206 and, for example, is oval in accordance with FIG. 15 or circular in accordance with FIG. 18.
  • the thread pressing zone (viewed in the longitudinal direction of the fiber bundle 14) is shorter than the coverage of the endless strap 202 and 205 viewed in the top view (diagonal parallel to the thread of the rhombus formed by the endless strap in the projection ) and preferably also shorter than the respective width of the intersecting endless straps.
  • the pressing device 206 which is preferably designed as a stamp on a cylinder-piston unit and is acted upon by a pressure fluid
  • the piston and the plunger 211 can only be displaced against a defined restoring force, for example a compression spring 212.
  • the compression spring 212 is supported on the cylinder 213 and forces the piston back into its initial position when the cylinder 213 is depressurized or vented, so that the pressing surface 210 of the plunger no longer acts on the rear side of the belt 202.
  • the thread bundle 14 is constantly monitored by a thread monitor 214.
  • a self-venting control valve 215 is actuated by contact and the pressing device 206 switched off by shutting off the flow from the pressure medium source 216.
  • the cylinder 213 is vented via the control valve 215, so that the piston and pressure ram 211 is pushed back by the tensioned compression spring 212 and its pressure surface 210 is moved away from the endless belt 202.
  • 17 shows various embodiments of the false twist texturing device, in which, for the purpose of a simplified representation, the cutouts according to FIGS. 17a to 17d correspond to cross sections of the strip runs rotated into the drawing plane according to FIG. 16.
  • 17a shows such a false twist texturing device, in which endless straps 218 and 219 with a cross section curved on one side toward the thread path 14 are used.
  • the overflow rollers are circular-cylindrical or have a barrel-shaped running surface to stabilize against lateral displacement in the longitudinal section.
  • 17b shows the detail of a false twist texturing unit with friction surfaces formed by two endless flat aprons 220 and 221.
  • One is pressed against the fiber bundle 14 from its rear side by a pressure die 222 which is curved at its edges.
  • the flat apron 220 abutting the pressing surface 210 is deformed convexly in the thread pressing zone and the apron edges are lifted off the thread run, in particular if the two friction surfaces form a free gap between them before the pressing device is switched on.
  • the endless belt 221 can also be replaced by the friction surface formed by a rigid disc or roller according to FIGS. 7 to 12.
  • 17c shows the section of a false twist texturing unit according to FIG. 18, in which one of the overflow rollers 223 and 225 for the endless flat aprons 227 and 228 each have a barrel-shaped tread, while the other overflow rollers 224 and 226 are formed by circular cylindrical rollers, the height of which is greater is than the width of the flat straps.
  • the flat aprons 227 and 228 are arched, the friction surfaces being convexly curved against the thread path.
  • This curvature is reinforced by the pressure stamps 229 of the pressure devices, which are of circular cylindrical cross section and act on the flat straps from the rear.
  • the pressure zone is considerably narrower than that to increase the convex deformation of the endless straps Strappy width.
  • both overflow rollers 223, 226 and 224, 225 could also be barrel-shaped.
  • FIG. 17d shows an exemplary embodiment with a pressure device which has a pressure piston 230 which can be displaced, for example, in the cylinder of a cylinder-piston unit or by another force transmitter, and a pressure roller 231 with a barrel-shaped running surface being freely rotatable on the end face of this pressure piston is mounted, through which the endless belt 232 in the thread pressing zone is convexly curved against the fiber bundle.
  • the endless flat belt 233 can also be replaced here by another, stiff friction surface.
  • the overflow rollers can be barrel-shaped or cylindrical in longitudinal section with conical or barrel-shaped end regions.
  • the pressing device 6 according to FIGS. 6, 8, 10, 11 and 14 or 206 according to FIG. 16 has - similar to the pressing device described with reference to FIGS. 3 and 4 - a force transducer designed as a cylinder-piston unit and is acted upon by a pressure fluid.
  • the pressure medium preferably compressed air
  • supplied to the cylinder 46 through line 47 acts statically on the inner end face 48 of the piston 49 and, on the other hand, flows as lubricating air through the axial channel 50 of the piston 49 into the air cushion chamber in the pressing surface, which is designed as a depression 51 and is open at the end 53 of the piston or stamp. It is designed in cross-section in accordance with the desired geometric configuration of the pressure zone 4 or 210 or 229.
  • the piston 49 which has the open air cushion chamber 51 in the axial direction, extends when pressurized until it rests against the rear of the belt run assigned to it. This prevents a further outflow of the pressure medium due to the edge 52 of the piston 49 designed as a sealing surface. If the gap between the pressure surface 53 and the back of the belt run is sealed, then the static pressures in front of the inner end surface 48 of the piston and in the air cushion chamber 51 are equalized, a balance of forces being established in the case of the same active surfaces.
  • the pressure medium flowing into the air cushion chamber 51 can only relax via a gap forming between the edge 52 of the piston 49 and the rear of the belt or belt run.
  • the gap between the two surfaces is interrupted by the gap, but the contact pressure is transmitted with low friction with the interposition of the fluid cushion.
  • This mechanism of aerostatically lubricating the piston face 53 or the pressing surface of the plunger while simultaneously exerting an adjustable contact pressure on the back of the flexible friction surface in the pressing zone is the basis of the preferred design of the pressing device.
  • the end sealing surface 52 of the piston or plunger is expediently designed in accordance with FIGS. 22 to 25 in order to be able to take into account the conditions of the false twist texturing device, the surface condition of the belt run, the desired surface pressure in the pressure zone or the pressure medium consumption.
  • long gap paths are used 22 or a labyrinthine structure of the pressing surface 53 according to FIGS. 24 and 25, a reduction in the compressed air consumption, while a narrow sealing surface of the edge 52 according to FIG. 23 results in a sharper delimitation of the pressing zone between the air cushion chamber 51 and the ambient atmosphere according to FIG. 22.
  • the piston 49 has the air cushion chamber 51 at its front end, in order to reduce the friction between the pressing surface 53 and the rear of the working surface.
  • the piston 48 or plunger can also be designed such that it has only one or more axial bores 127, 130, 131 or axial slots 54 in the axial direction, through which a partial flow of the pressure medium can escape and which "lubricates" the pressure surface 53 of the piston 49 or the plunger 126.
  • Such slots are useful, for example, for elongated, in particular oval, stamps or piston end faces (FIGS. 26 to 28).
  • the previously described pressing device according to FIG. 6 is modified such that the cylinder 46 is connected to two different pressure sources via ring channels 55 and 56.
  • 19 has the advantage that the pressing force of the piston 49 is independent of the quantity supply of the air cushion chamber 51 and can be set separately.
  • the compressed air led through the feed line 57 and the annular duct 56, on the other hand, independently of the pressure of the piston or plunger, causes air lubrication between the pressure surface 53 and the rear of the friction surface.
  • Fig. 20 illustrates another modification of the cylinder-piston unit, in which the force exerted by the pressure fluid on the inner end face 48 of the piston 49 by another force generator, for example a compression spring 58, a permanent magnet, an electromagnet, a weight or the like ., is produced.
  • a compression spring 58 presses on the pistons, for example end face 48. It can be preloaded purely mechanically by an adjustable threaded cap 59.
  • the compressed air supply for air lubrication takes place in this system in analogy to FIG. 19, in that the pressure fluid source connected to the ring channel 56 is connected to the air cushion chamber 51 through oblique bores 60 and an axial channel 61 with a throttle point 62.
  • the air lubrication on the pressing surface 53 of the plunger is independent of the structural design of the force generator which effects the pressing force on the plunger and its adjustment against the rear of the friction surface.
  • the pressing device 6, 206 consists of the cylinder 46, which can be connected to two pressure sources via two fluid inlet channels 55 and 56. It should be mentioned that the fluid pressures in both lines can be set to predetermined values by conventional pressure reducing valves or throttling devices, in which the pressing device delivers the best texturing results for a given synthetic multifilament thread and for certain machine settings of the friction surfaces. These values can easily be determined by simple tests.
  • the fluid inlet channel 55 opens into the cylinder 46 into a pressure chamber 121 above the piston 49 and forces it out of the cylinder 46 until the piston has reached an end position defined by a stop, not shown, or until a reaction force restores the balance of forces.
  • the second fluid inlet channel 56 opens into the pressure chamber 123 in the piston 49 and is through an axial bore 50 with it adjoining distribution channel 125 and the pressing surface of the plunger 126. It provides the lubricating air to reduce the friction between the pressure surface of the punch and the back of the belt or belt run.
  • Fig. 26 shows in longitudinal section and Fig.
  • FIG. 27 with a view of the pressure surface of the plunger 126 that the pressurized fluid emerges through a distribution channel running along the thread clamping line distributed over several bores 127 arranged in the end surface of the plunger.
  • the pressure fluid is distributed over two rows of bores 127 arranged in parallel, while according to FIG. 29 a zone 128 of the pressing surface of the punch 126, which extends in the direction of the thread clamping line, consists of a porous material and is inserted into the pressing surface of the punch is. If necessary, this can also be designed to be two-dimensionally curved (convex-cylindrical curvature).
  • cylinder-piston units were also successfully used, in which a plunger 129 was designed in accordance with FIGS. 30 and 31.
  • the axial bore 124 for the outlet of the pressure fluid provided for lubrication opens into a central throttle bore 130 in the pressure surface 126 of the plunger 129 or into an annular channel, to which the circumferentially distributed outlet bores 131 according to FIG. 32, a porous circular surface 132 according to FIG. 33 or connect a porous ring surface 133 according to FIG. 34 to the pressing surface of the stamp.
  • Such a design of the pressing surface 126 in connection with the omission of an air cushion chamber on the stamp end face has the advantage that high-frequency vibrations are suppressed even with difficult operating settings and high working speeds of the friction surfaces, which adversely affect the smooth running of the fiber bundle 14 in the thread pressing zone and disturbing noise can generate.
  • the pressure ram 222 is arranged in a fixed manner in and transversely to the direction of movement of the belt or belt run 220, for example by being fastened to the machine frame in a holder 234. Perpendicular to the belt or belt run 220, it can be mechanically adjusted to the rear of the belt or belt run 220 by means of the knurled screw 235 and the adjusting thread 236.
  • the pressure ram 222 has an axial channel 50 in the longitudinal direction, which can be acted upon with compressed air via the feed line 57 for lubricating the pressure surface.
  • the flexible belt or belt run 220 is slightly bulged toward the thread 14 and an analogous pressing action is achieved as with the pressing devices described above, since the air cushion in the area of the bulge 237 is compressible and the friction surface is thus pressed resiliently against the thread and on the other hand with the Lubrication takes place on the pressure surface escaping compressed air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
EP80103908A 1979-07-14 1980-07-09 Appareil pour conférer une torsion ou une fausse torsion à un fil composé de plusieurs filaments Expired EP0022552B1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DE2928522 1979-07-14
DE19792928522 DE2928522A1 (de) 1979-07-14 1979-07-14 Vorrichtung zum zwirnen oder texturieren von textilfaeden
DE2952305 1979-12-14
DE19792952305 DE2952305A1 (de) 1979-12-24 1979-12-24 Vorrichtung zum zwirnen oder texturieren von textilfaeden
DE3008233 1980-03-04
DE3008233 1980-06-14

Publications (2)

Publication Number Publication Date
EP0022552A1 true EP0022552A1 (fr) 1981-01-21
EP0022552B1 EP0022552B1 (fr) 1984-07-11

Family

ID=27188128

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80103908A Expired EP0022552B1 (fr) 1979-07-14 1980-07-09 Appareil pour conférer une torsion ou une fausse torsion à un fil composé de plusieurs filaments

Country Status (4)

Country Link
EP (1) EP0022552B1 (fr)
BR (1) BR8004326A (fr)
DE (1) DE3068514D1 (fr)
MX (1) MX151309A (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2493882A1 (fr) * 1980-11-07 1982-05-14 Murata Machinery Ltd Dispositif de fausse torsion du type a courroie
FR2607801A1 (fr) * 1986-12-04 1988-06-10 Saint Gobain Vetrotex Procede et dispositif de fabrication d'un fil de verre simple obtenu directement sous filiere
CN115434053A (zh) * 2022-08-24 2022-12-06 山东岱银纺织集团股份有限公司 一种提高纱线蓬松度的装置及其使用方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3724394A1 (de) * 1986-08-02 1988-02-25 Barmag Barmer Maschf Verfahren zur herstellung eines gleichmaessigen spinnfasergarnes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863280A (en) * 1952-05-23 1958-12-09 Ubbelohde Leo Method of crimping filaments
US2991614A (en) * 1953-03-25 1961-07-11 Ubbelohde Leo False twisting apparatus for producing crimped filamentary materials
DE2628396A1 (de) * 1975-06-24 1977-01-13 Oda Gosen Kogyo Kk Verfahren und vorrichtung zum falschzwirnen
CH586296A5 (en) * 1975-06-23 1977-03-31 Heberlein & Co Ag Friction false twisting device - for texturising thermoplastic yarns, has a guide for holding a moving yarn at an angle to the direction of motion of a moving belt

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2863280A (en) * 1952-05-23 1958-12-09 Ubbelohde Leo Method of crimping filaments
US2991614A (en) * 1953-03-25 1961-07-11 Ubbelohde Leo False twisting apparatus for producing crimped filamentary materials
CH586296A5 (en) * 1975-06-23 1977-03-31 Heberlein & Co Ag Friction false twisting device - for texturising thermoplastic yarns, has a guide for holding a moving yarn at an angle to the direction of motion of a moving belt
DE2628396A1 (de) * 1975-06-24 1977-01-13 Oda Gosen Kogyo Kk Verfahren und vorrichtung zum falschzwirnen

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2493882A1 (fr) * 1980-11-07 1982-05-14 Murata Machinery Ltd Dispositif de fausse torsion du type a courroie
FR2607801A1 (fr) * 1986-12-04 1988-06-10 Saint Gobain Vetrotex Procede et dispositif de fabrication d'un fil de verre simple obtenu directement sous filiere
EP0273812A1 (fr) * 1986-12-04 1988-07-06 Vetrotex Saint-Gobain Procédé et dispositif de fabrication d'un fil de verre simple obtenu directement sous filière
US4853021A (en) * 1986-12-04 1989-08-01 Vetrotex Saint-Gobain Process and apparatus for producing coated single twist glass yarns
US4927445A (en) * 1986-12-04 1990-05-22 Vetrotex Saint-Gobain Apparatus for producing coated single twist glass yarns
CN115434053A (zh) * 2022-08-24 2022-12-06 山东岱银纺织集团股份有限公司 一种提高纱线蓬松度的装置及其使用方法
CN115434053B (zh) * 2022-08-24 2024-04-19 山东岱银纺织集团股份有限公司 一种提高纱线蓬松度的装置及其使用方法

Also Published As

Publication number Publication date
DE3068514D1 (en) 1984-08-16
BR8004326A (pt) 1981-01-27
EP0022552B1 (fr) 1984-07-11
MX151309A (es) 1984-11-08

Similar Documents

Publication Publication Date Title
EP0022743B1 (fr) Appareil pour la fausse-torsion de fils et utilisation de cet appareil pour la fabrication d'un fil
DE2928522A1 (de) Vorrichtung zum zwirnen oder texturieren von textilfaeden
DE3878573T2 (de) Vorrichtung und verfahren zum verstrecken textiler faserbaender.
CH652763A5 (de) Friktions-falschdralleinrichtung.
CH706775B1 (de) Streckwerk für eine Spinnereimaschine, insbesondere für eine Karde, Strecke, Kämmmaschine oder einen Bandwickler.
EP0022552B1 (fr) Appareil pour conférer une torsion ou une fausse torsion à un fil composé de plusieurs filaments
WO2004044292A1 (fr) Metier a filer equipe d'un dispositif de serrage
DE10214339A1 (de) Streckwerk für eine Spinnereimaschine
EP3027794B1 (fr) Métier à filer avec dispositif de fausse torsion
DE102014107137A1 (de) Spinnmaschine
EP1576217A1 (fr) Garniture pour rouleaux de banc d'etirage
DE10154127A1 (de) Vorrichtung an einer Spinnmaschine zum Verdichten eines Faserverbandes
DE960072C (de) Unterriemchen-Streckwerk fuer Spinn- und Vorspinnmaschinen
DE3428518A1 (de) Vorrichtung zum zwirnen eines faserbandes oder garnes
DE4014759C2 (fr)
EP0625601B1 (fr) Dispositif de coupe pour fils de trame et métier à tisser avec un tel dispositif
DE2952305A1 (de) Vorrichtung zum zwirnen oder texturieren von textilfaeden
DE1115162B (de) Antrieb fuer Spindeln von Spinn- und Zwirnmaschinen
DE3123672C2 (fr)
CH720394A1 (de) Riemen für eine Wickelvorrichtung und dessen Herstellungsverfahren
EP1991725A1 (fr) Couche d'usure pour cylindres de sortie d'un banc d'étirage à cylindres
CH720395A1 (de) Riemen für eine Wickelvorrichtung und dessen Herstellungsverfahren
DE102004008963A1 (de) Walze für ein Streckwerk einer Spinnereimaschine
DE924555C (de) Riemchen-Streckwerk
DE102007014157A1 (de) Streckwerk mit wenigstens einem Riemchen zur Verfeinerung von Fasermaterial

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): CH DE FR GB IT

17P Request for examination filed

Effective date: 19810122

ITF It: translation for a ep patent filed

Owner name: DE DOMINICIS & MAYER S.R.L.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 3068514

Country of ref document: DE

Date of ref document: 19840816

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940901

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19940916

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940923

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19940924

Year of fee payment: 15

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19950731

Ref country code: CH

Effective date: 19950731

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950709

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960430

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST