JPS638217B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a synthetic yarn false twisting device for a textured processing machine, which twists the yarn by tightening the yarn between a moving surface and the end face of a rotating disk. Concerning things that can be hung.

Swiss Patent No. 278535 describes a frictional false-twisting device consisting of flat, intersecting, endless circulating belts which move the yarn between them for the purpose of false-twisting and transporting the yarn. Types that can be tightened have become publicly known. Cross belts of this type are made of a material that can withstand alternating bending loads and is able to bend flexibly with little bending moment.
On the other hand, however, this material must be able to withstand the centrifugal forces and the tensile forces caused by the preload. By the way, such a material that is easy to bend and exhibits only a slight deformation resistance against bending force, but also has high tensile strength and can be elastically bent, is suitable for use in the present invention. It has been found to be particularly suitable as a material for flexible discs.

False-twisting devices are also known which consist of two disks circulating in opposite directions, which disks are inclined at an angle to each other and touch each other at one point on the periphery. It's summery. Similar types of devices (U.S. Pat. No. 3,156,084 and
No. 4,145,871), the axes of rotation of the discs are further offset from each other and the discs are mechanically pressed together by spring force.

Finally, in a further device of this type (U.S. Pat. No. 3,373,554) the working surface of a rigid disk or a moving surface supported by a rigid disk is provided, e.g. It has been proposed that the magnets be made as magnets with opposite polarity and consist at least in part of permanent magnets, so that they can be magnetically pressed together.

In the previously mentioned known disc units of the type in which the discs are arranged with narrow gaps and at small angles to each other and the discs are pressed against the yarn in the yarn false twisting area, very few of the discs The imbalance or out-of-roundness is already a very significant problem.
This is because, when the rotational speed of the disc is high and the mass inertia is large, this deviation in the balance or out-of-roundness results in a deviation in the magnitude of the torsional force on the yarn, which in turn causes a change in the finished fabric. This is because visible texturing errors may occur when A similar unfavorable result is
It can also be caused by temperature differences in the disk during motion, thermal expansion of the disk causing changes in the gap width, or swelling of the surface of the disk material when the friction of the disk is reduced by liquid lubrication.

The object of the present invention is to improve the crimping effect of the friction surface that makes direct frictional contact with the yarn, and to transmit twisting force to the yarn in the crimping area of the false twisting device, in order to improve the textured processing effect and its uniformity. The objective is to ensure that this is carried out effectively.

This problem is solved according to the invention by a device having the features of patent claim 1.

According to the above-mentioned apparatus of the present invention, the following remarkable effects can be obtained. This means that, in contrast to the known rigid disks, precisely defined curves which can be well adapted to the thread tightening line due to the soft deformability of the friction surfaces formed by the flexible disks A crimped area is formed. In particular, the crimping zone can be adapted to the intersection angle of the disks by appropriate selection of the geometry of the crimping device. Furthermore, the simple control of the crimping force makes it possible to adjust the crimping force of the crimping device to the desired parameters in textured processing, such as yarn count, number of burns and yarn speed, without requiring large technical outlays. can be adapted to

The plunger of the crimping device can be pressed onto the rear side of the flexible disc in a particularly simple and inexpensive manner, for example by means of a compression spring, a permanent magnet or an electromagnet. According to one advantageous embodiment, the crimping device according to the invention is constructed as a cylinder-piston unit, the piston of which can be loaded with a pressure fluid, in particular a liquid or gaseous pressure medium.

If the plunger or piston of the crimping device is in direct frictional contact with the back of the flexible disc,
As the plunger or the replaceable end plate material attached to it, a material with a low coefficient of friction, such as graphite, can be chosen. The plunger or its end plate may also be
It may consist of an open-celled solid enriched with or impregnated with a lubricant. In all cases where the plunger or its end plate is in direct contact with the back surface of the flexible disc, the crimping area is geometrically defined by the end face of the plunger. In order to further reduce friction and wear between the end face of the plunger and the back surface of the flexible disc, the porous end plate of the plunger is injected with a suitable gaseous or liquid pressure fluid through longitudinal holes. It is also possible to provide it with lubrication.

According to an advantageous embodiment of the invention of the crimping device, the crimping force is transmitted to the back side of the flexible disk in a particularly friction-free manner by the at least one pressure fluid cushion when the back side of the flexible disk is directly loaded. Moreover, wear between the crimping device and the flexible disc can be avoided. It is also possible for this purpose to provide a longitudinal bore in the plunger or piston, which bore connects the piston surface, which is loaded with pressurized air, to the end face on the side of the flexible disc. Furthermore, a chamber is machined on the end face of the plunger on the flexible disk side, and a vertical hole is opened into the chamber, so that the pressure fluid acts directly on the back surface of the flexible disk, and locally pushes the flexible disk. It is also possible to elastically deform the material and press it against the thread. The longitudinal bore through the plunger or piston may have a throttle or the bore itself may be constructed as a throttle. In this case, pressurized air is supplied from a single source of pressurized air and is applied to the piston surface and creates an air cushion. However, the pressurized air can also be supplied from two separate sources of pressurized air, in which case, for example, the compressed air for the air cushion can be mixed with the lubricating liquid distributed as fine particles.

The abovementioned measures are particularly advantageous in that an aerostatic lubrication takes place between the crimping surface of the plunger and the flexible disc. This is because the crimping takes place in a non-contact manner and the force is transmitted in a non-contact manner, thereby avoiding various types of wear.

In addition, the crimping device is more sensitive to the non-planarity (irregularity) of a rigid or flexible disk than known crimping devices.
shocks are better absorbed, so that the demands placed on the surface properties of the back side of the flexible disc are much lower than, for example, in the case of co-rotating support rolls.

Furthermore, the flexible discs reiterated above cooperate with the other moving surface, preferably the friction surface, and in this case the end faces facing each other, i.e. the flexible discs on the one hand and the rigid discs on the other hand. That is, the inelastic, inflexible surfaces overlap each other and clamp and tighten the yarn to be false twisted between them.
The rigid moving surface can also be the end face of a rotatable disk. The "end surface" of a disk means a surface that lies within a plane perpendicular to the axis of rotation of the disk.

According to one embodiment of the invention, the rigid moving surface is the outer circumferential surface of a roll, which roll is made of a rigid, i.e. inelastic and inflexible, material. The construction and arrangement of such rolls requires lower manufacturing outlays than the case of rigid disks. The rolls are arranged so as to be pivotable in order to be able to adjust the crossing angle in the direction of movement of the friction surfaces or working surfaces that act on the thread with respect to each other.

The roll can be made cylindrical or frusto-conical or conical. The roll can be made in the form of a precise hyperbola of rotation or almost a hyperbola of rotation for perfect adaptation to the thread tension line.
The geometry of the hyperbolic surface of revolution is in this case advantageously determined in relation to the intersection angle α of the directions of motion of the friction surfaces cooperating with one another, which is set during operation of the texturing machine. The crimping surface of the crimping device is curved in one dimension into a convex lens shape to accommodate the above-mentioned intersection angle.

In a false-twist textured processing machine with a large number of working points, rollers made to be rigid at some or all working points of the textured processing machine,
It is advantageous for the rolls or the like to be arranged coaxially with one another and to be driven together by a shaft that preferably extends over a section or the entire length of the processing machine. The axes of rotation of the flexible discs are arranged parallel to each other and perpendicular to the common axis of the rigid rolls, with one thread in each case extending between the end face of the flexible disc and the outer circumference of the rolls. passes through while making frictional contact with both sides. In order to be able to vary the intersection angle of the movement directions of the two cooperating disks and rolls and thus to adapt them to the respective texturing requirements, the flexible disks can be pivoted or moved. Possibly supported,
Each can be adjusted to the roll individually or together.

The crimping device is arranged on the end face side of the flexible disk opposite to the yarn running path (yarn path) side, and in this case, the crimping device extends over a part of the entire length of the yarn path adjacent to the flexible disk. A pressing force is applied substantially perpendicularly to the end face of the flexible disc.

According to the above-mentioned configuration, a simple structure of the textured processing machine with low manufacturing costs and a compact structure is obtained. According to the above-mentioned compact construction type, the time required for operating the processing machine is also shortened.

According to the embodiment set forth in claim 24, a texturing machine having an aerodynamic or hydrodynamic crimping device according to the invention can be used for producing effect yarns.

Thus, for example, by varying the surface velocity of the working surface or friction surface according to a predetermined program, the textured machine can be used in a particularly simple and advantageous manner for the production of different effect yarns. In this case, it is advantageous to vary the fluid pressure aperiodically or according to a predetermined program so that the plunger of the crimping device is statically crimped on the rear side of the flexible disc. However, it is also possible for such fluid pressure changes to occur randomly and randomly. This advantageously controls the slippage between the yarn and the flexible disc and, at equal working speeds, the distribution of the degree of crimp in the yarn count or effect yarn, thereby achieving the desired texture. It is possible to produce processing effects.

However, it is also possible to intentionally create such a textured effect by intentionally increasing the rotational speed of the disc aperiodically and, in some cases, simultaneously increasing the compression force, thereby intentionally overtwisting the yarn. It is also possible to tighten. Finally, it is also possible to suitably define the friction values of the friction surfaces cooperating with the yarn, so that the slip action is increased when the crimping force is reduced aperiodically or according to a predetermined program, thereby increasing the slipping effect. It is also possible to intentionally create capillary-like gaps on the surface of the yarn to give the textured multifilament yarn certain short-fiber yarn-like properties. In order to increase the irregularities that give rise to such effects, the yarn guides before and after the yarn treatment area can also be made adjustable according to a predetermined program. Also, to increase the irregularity mentioned above, as well as the friction value of the moving surface,
It is also possible to take into account changes in the crossing angle and thus also the torsional and conveying forces acting on the yarn.

The invention will now be explained with reference to the illustrated embodiment.

1 to 4 show a false-twisting device, in which case a crimping device 6 is used, as shown in the cross-sectional views of FIGS. 2 and 4. The false twisting device in this case has two rotatably mounted and rotatably driven disks 26 and 27, 28 and 29, respectively.
and 42 and 43, some of which have different diameters and some of which have equal diameter, and which also include rigid and flexible discs or flexible discs. and a flexible disk.

Rigid discs 26, 28 are each supported by a drive shaft 30 with a boss 31. In this case, a "rigid disc" or "rigid disc" is a disc that has a disc body with high bending strength and is rotatable around a rotation axis, and the surface of the disc body is is meant to be practically inelastic or inflexible with respect to the thread in the area of contact with the thread, in other words in the area in which it clamps the running thread in cooperation with the corresponding disc.
Such surfaces can be specially treated or coated, as explained in more detail below.

The dish-shaped disk 26, which projects axially and has a flat edge 32 as a friction surface in contact with the thread, and the boss are integral and are made, for example, of cast iron. The bottom of the dish is made relatively thick to increase the bending strength of the disc. The discs 27 and 29, on the other hand, are made as flat, thin discs of an elastically deformable material and are connected to the tensioning sleeve 3.
3 to the shoulder 34 of the drive shaft 35.
The discs 26, 27 and 28, 29 are arranged parallel to each other and form a narrow axial gap 36 between them, as shown in FIG. Yarn 14 running in at an angle
Or 14a is disk 26 and 27 or 28
and 29, and is twisted about the yarn axis by direct frictional contact and conveyed in the running direction. The crimping device 6 in this case acts locally on the thin flexible disc 27 or 29 and presses the thread crimping area 38 of the disc against the thread 1.
4, the thread is pressed against a rigid disk 26 or 28
Supported against. As already mentioned, the geometry of the yarn crimping area 38 depends on the texturing conditions of the yarn, in particular the width of the edge 32 of the disk 26, the yarn count,
It can be adapted to the thread tension, the friction condition of the friction surface, etc.

The advantages of the illustrated false-twisting device with a rigid disk and a flexible disk pressed against the rigid disk over known false-twisting devices with crossed belts are:
It is therefore possible to use further, in particular harder and more wear-resistant materials as the material of the friction surface. Plastics, steel and other metals as well as ceramics can be used as such materials. Additionally, known surface treatment methods, such as plasma coating methods, can be used to improve the frictional action of the friction surface on the threads and to increase the service life of the friction surface. The flexible disk may therefore be made of rubber, for example, and may have a rubber coating or layer. The flexible disc can also be coated with other suitable soft materials to form the friction surface.

The disc shown in the partial cross-sectional view in FIG. is combined with The ring-shaped configuration is advantageous in that it is not necessary to provide a coating on all end faces of the disc.

The apparatus of FIGS. 1 to 4 can be operated with different thread paths if the direction of rotation (direction of rotation arrow) is the same. In other words, whereas in FIG. 1 the thread passes through the area between the axes of the two discs, in the device of FIG. 3 the thread path runs parallel to the connecting line connecting the two axes of rotation. In the device according to FIG. 3, the application of the thread is easier than in the device shown in FIG. We have to accept the drawback of instability.

Furthermore, in the apparatus shown in FIG. 1, the diameters of the discs are different, so that the overlapping of the end faces of the discs is asymmetrical. This has the advantage that the thread entry point is offset from the thread clamping area of the disc.

In the false-twisting device of FIG. 4, unlike the devices of FIGS. 1 to 3, two flexible thin discs 42 and 43 are fixed to shafts 44 and 45, and are separated by a small axial distance. It is arranged as follows. These discs are driven in the same direction as indicated by the rotation direction arrows.

According to the invention, the flexible disc is made thin-walled and is made of a material that has a high tensile strength on the one hand and only a very low bending strength on the other hand. As a result, the disk locally and temporarily curves and protrudes due to a force acting locally perpendicular to the end surface of the disk, and immediately returns to a flat state when the force ceases to act. Return. In the device of the invention, the force of the crimping device is applied to the thread by a thin-walled flexible disc, the thread being supported by a rigid disc or a second thin-walled flexible disc; is also supported from the rear side by a crimping device. A very narrow gap is left between the two discs, in which the running yarn is squeezed between the two discs.

According to the invention, an elastomer part is used as the material of the flexible disk, preferably a binder consisting of a chemical based on acrylonitrile-butadiene copolymer or polyurethane rubber, and which acts on the disk. It is particularly advantageous to have the embedded cord fibers in a plane parallel to the disc friction surface in order to accommodate the centrifugal forces that occur. In this case, the elastomer component of the material of the friction surface ensures, on the one hand, a slip-free transmission of twisting forces to the running yarn and, on the other hand, a good elastic deformation of the disk wall in the crimping zone. This is because the embedded cord fibers do not exhibit any significant deformation resistance to deformation due to forces acting locally from behind the working surface.

The above material combination also has the following advantages: That is, the end faces of adjacent and mutually cooperating discs, for example 26 and 27, 28 and 29, 42 and 43, are kept not pressed against each other outside the crimping area, i.e. they are carried together between the working surfaces. A layer of air pushes them apart and keeps them out of contact. This means that almost no wear occurs in the area of the overlapping friction surfaces of the disks, even when no threads run.

The cord fibers for receiving the tensile forces acting on the discs may be produced as flat fiber fleeces, preferably non-oriented fiber fleeces, or as woven, knitted, embedded threads, etc., of fibers with high tensile strength. and can be impregnated with an elastomer component solution to provide a coating layer of the elastomer component material. The cord fibers consist in particular of natural fibers, synthetic fibers, organic fibers such as carbon fibers, preferably polyamide or polyethylene terephthalate fibers with high tensile strength. It is also possible to use inorganic fibers as material for the embedded cord fibers, such as glass fibers or metal fibers, in particular steel fibers (steel cord).

Furthermore, depending on the thickness of the disc, it is also possible to superimpose several embedded cord fabrics, possibly even in angular positions with respect to one another, so that the warp or weft threads of the fabrics overlap each other. This results in an approximately uniform tensile strength over the entire area of the disc.

The total thickness of the disc-shaped or annular friction surface is 0.6 to 3 mm,
It is advantageously between 0.8 and 1.4 mm, in which case the outer diameter of the disc is approximately 80 mm. In experiments, a very uniform twist was obtained at yarn speeds above 600 m/min, which resulted in a very uniform crimp of the yarn after heat setting.

No wear was observed on the friction surfaces even after the device had been operated for a relatively long time. No wear on the friction surface was observed even when unnecessary pressure was continued to be applied after yarn breakage occurred.

Flexible discs 27 and 29 or 42
and 43 (FIG. 4) can also be secured by other means than by clamping the drive shaft 44 or 45 between the shoulder 34 and the clamping sleeve 33. FIG. 7 therefore shows, for example, a rotationally symmetrical support 10 onto which a flexible disc 11 is glued flat.
The radially projecting edge of the flexible disc 11 is acted upon in this case by a crimping device 6, which is schematically illustrated in the area of the thread crimping zone. The flexible disk 11, as already mentioned, consists of a bond consisting of an elastomeric component and embedded cord fibers. It is also possible to use embedded cord fibers made of very fine metal fibers to increase the bending strength of the disc. The support 10 of the flexible disc 11 has a toothed wheel 12 on its leg, via which a toothed belt 13 driving the disc is guided. The support body is coupled to a rotating shaft supported by a bearing 9 with a screw. Since the construction of the bearing part of the device is not a subject of the invention, this construction will not be described in detail.

5 and 6 are schematic plan and side views of a false-twisting device, in which a rotationally driven flexible disc 107 of the invention is used, which disc is rigidly manufactured. roller or roll 10
No. 3 cooperates with the outer circumferential surface 103 located in the radial direction with respect to the disk 107 to impart twist to the yarn 104. A flexible disk 107 driven from a shaft 108 is connected to a fluid-operated crimping device 1 which will be described later.
05, the yarn 104 and roll 103 are locally compressed within the crimping area 106 defined by the plunger.
As a result, the yarn 104 is conveyed in the direction of the arrow shown in FIG. 5, and is falsely twisted at this time. In this case, the flexible disc 107 is driven in the direction of rotation indicated by the arrow 109, the rigid cylindrical roll 103 is driven in the direction of rotation indicated by the arrow 110, and the thread 104 is passed through the thread guide 150 or 151 to the flexible disc 107. below the
The disk 107 and the roll 103 are caused to run into or out of a yarn running path where the circumferential speeds of the outer circumferential surfaces thereof are approximately equal. The intersection angle at the clamping point or the center point of the clamping line in the direction of both circumferential velocities is indicated by α in FIG. Although the crossing angle α in FIG. 5 is 90 degrees, this value can be set smaller or larger depending on the properties required of the yarn.

FIG. 6a shows a false-twisting device similar to that of FIGS. 5 and 6, in this case a cylindrical roll 1
03 is replaced by a conical, more precisely frustoconical, roll 203. In this embodiment of the false-twisting device, a particularly good coordination of the circumferential speeds of the flexible disk 107 and the roll 203 is achieved in relation to the distance from the center point of the flexible disk 107 to the tightening line.

FIG. 6b schematically shows a plurality of false twisting devices of the type of FIGS. 5 and 6 forming a section of a texturing machine. In this case, all rolls 103 share a common one to simplify driving.
They are sequentially arranged and driven in the axial direction by two drive shafts 115. The individual flexible discs 107 are arranged in parallel above the rolls 103 at intervals corresponding to an extremely narrow textile machine pitch, and are pressed onto the rolls 103 by separate crimping devices (not shown).
is pressed toward the outer circumferential surface of the The intersection angle between the moving direction of the roll 103 and the yarn traveling path is determined by the yarn guide 116.
and 117. These thread guides are adjustable and can be adjustably mounted to a textured machine frame, not shown. Further, in order to adjust the above-mentioned crossing angle α between the friction surfaces that impart twisting, the flexible discs 107 are individually arranged to be pivotable about a pivot axis 118 relative to the rolls 103. Swivel arm 1 supporting the flexible discs 107 of all false twisting devices of the textured processing machine
19 are connected to each other by means of rods extending along the texturing machine in order to be able to adjust the intersection angle α at all working points or in one working section of the texturing machine. combined. Instead of the rotating mechanism of the flexible disk, the longitudinal direction of the flexible disk and/or
It is also possible to provide a lateral movement mechanism.

Before explaining the crimping apparatus shown in FIGS. 1 to 6 in detail, first the crimping apparatus 5 is
8b and 9 will be described in detail. The crimping device consists of a cylinder-piston unit 15 which, via its piston 16, operates a plunger 18 by hydraulic force to press it approximately perpendicularly against the dorsal sides of the flexible discs 42 and 43.
A flexible disk 4 formed by this
A thread 14 passes within the crimping zone between 2 and 43, the surface of which comes into frictional contact with the friction surfaces of these disks. The cylinder-piston unit 15 is connected via a supply conduit 19 to a fluid source, not shown.
Advantageously, it is connected to a source of pressurized air. It is also possible to use pressurized liquid instead of pressurized air.
The piston 16 loaded with pressure fluid is the cylinder 1
You will be guided within 7. The pushing force of the piston 16 is transmitted to the piston rod 21 via an intermediate layer 20 of elastic, vibration-absorbing material, so that vibrations due to non-flatness of the flexible disc or of the thread itself are absorbed. The piston 16 is a piston rod 21
The plunger 18 is connected to a pressure plate 22 by a press plate 22, and the plunger 18 is attached to the pressure plate.

In the crimping device shown in FIGS. 8a and 8b, the thread crimping area can be defined geometrically by the shape of the cross section of the plunger 18 or by the end face of the plunger, and in the direction of movement of the flexible disc. can be selected in relation to the intersection angle α and the width.
Therefore, the plunger 18 and the flexible disc 4
2, 43 and at the same time transmit a predetermined pressure force to the thread 14, for example, a narrow oblong crimping area 38 (see FIG. 1 and Figure 3) is advantageous. The tilting of the plunger 18 when wear increases is caused by the pressure plate 22 and piston rod 2 within the cylinder 17.
This is prevented by guiding over a sufficient length of 1.
Furthermore, the plunger 18 and the flexible disc 4
In order to further reduce the wear of 2 or 43,
It is also possible to form the end surface of the plunger 18 in the shape of a spherical surface, in other words, in the shape of a convex lens with respect to the flexible disc. It is therefore possible for the end face to be formed, for example, by a section of a cylinder or a sphere. Such a configuration of the end face of the plunger 18 is advantageous for the rounded protruding deformation of the flexible disc in the crimping region and for its return to the flat disc plane.

Plunger 18 can be made of graphite to reduce frictional forces. Advantageously, the plunger 18 has a graphite end plate which contains metal grains of bronze, copper or the like in order to improve the heat dissipation effect. However, it is also possible to use end plates made of open-cell material enriched with or impregnated with suitable lubricants.

In FIG. 8b, the crimping device is shown in a position rotated by 90 degrees with respect to FIG. The possibility of a new configuration is shown.

Furthermore, according to a configuration of the invention not shown in FIGS. 8a and 8b, the piston rod 21
A gaseous or liquid lubricant is supplied to the open-celled sintered plunger 18 through the long hole in the axial direction of the press plate 22 . This lubricant can, for example, be a partial flow of the pressure fluid applied to the cylinder-piston unit 15. The liquid lubricant can be distributed in the gas stream as fine particles and mixed in the form of a lubricant mist.

FIG. 9 shows a cylinder piston unit 1 of the crimping device which can be replaced with the one shown in FIGS. 8a and 8b.
5 is shown, in which case a stationary metal insert or plunger 23 is mounted on the pressure plate 22 in the form of a plain bearing segment, which has parallel longitudinal edges and for guidance in the cylinder 17. In short, the flexible disc has a wedge-shaped notch 24 on the end face side. Viewed in the direction of disc movement, the height of the notch decreases from the front side to the rear side of the plunger 23, and as a result, aerodynamic air is created between the crimping surface of the plunger 23 and the flexible disc. A cushion is formed. The side wall of the plunger 23 is manufactured such that its end face is located parallel to the end face of the flexible disc.

Already during the start-up of the flexible disc, the cylinder 1 is installed in such a way that a clamping force can be applied to the thread without significant friction between the side wall of the plunger 23 and the end face of the flexible disc.
A nozzle 25 can be arranged in the wall of 7, also in front of the plunger 23, seen in the direction of rotation of the flexible disc, by means of which the lubricant, preferably water, does not impair the properties of the thread 14. It is also possible to spray a treatment liquid or a suitable oil emulsion onto the end face of the flexible disc.

2, 4 and 6 for the crimping device 5.
The crimping device 6 used in the false-twisting device of the figure is such that the crimping force is generated by a pressure fluid cushion, which compresses a pressure fluid having the required or desired pressure value from a source of pressure air. It can advantageously be produced by supplying pressurized air.

In this case, aerostatic lubrication takes place between the crimping surface of the plunger and the back surface of the flexible disk.

The crimping device 6 shown in FIGS. 2 and 6 consists of a cylinder-piston unit capable of being loaded with pressure fluid. The pressure medium, preferably pressurized air, supplied from the cylinder 46 via a conduit 47 is on the one hand delivered to the end face 4 of the piston 49.
8 acts statically on the enlarged open air cushion chamber 51 on the end face of the plunger 52. This plunger 52 is connected to the piston 49.
It can be formed by or attached to the end opposite end face 48. The cross section of the end face of the plunger 52 is the crimping area 3.
8 and, if necessary, as a sealing surface 53.

Air cushion chamber 5 open towards the end face
When loaded with a pressure medium, the piston 49, in which a plunger 52 having a diameter of 1 is located at its free end, is pushed out to the point where the sealing surface 53 of the plunger 52 comes into contact with the rear side of the disk 42 or 43. As a result, the subsequent outflow of the pressure medium is significantly suppressed due to the sealing action of the plunger against the rear side of the flexible disc. In an extreme case, if the gap between the plunger end face 53 and the back side of the flexible disk is sealed, the pressure on the piston end face 48 and the pressure in the air cushion chamber 51 will balance, in which case the piston surface area will be If they are equal, an equilibrium of forces occurs. However, piston 4
Since there is a leakage between the plunger 52 at the free end of 9 and the rotating disk and the pressure medium continuously enters later through the axial passage 50, the pressure in the air cushion chamber 51 is limited. Due to the pressure loss in the passage 50, it is less than the pressure on the end face of the piston 49. This compresses the plunger 52 somewhat tighter and increases the sealing effect, which also reduces the amount of leakage. The piston position, the width of the gap, the pressure medium consumption and the action of the piston on the back side of the flexible disk are therefore interrelated, and an equilibrium state automatically arises in this case.

The fluid pressure generated in the air cushion chamber 51 is discharged exclusively via the gap formed between the plunger 52 and the back side of the flexible disk, which gap ensures a frictional contact between the two sides. interrupted and the crimping force is transmitted via the fluid cushion.

While simultaneously applying an adjustable crimping force to the crimping area of the flexible disc, the plunger end face 53
Such a mechanism for aerostatic lubrication forms the basis of an advantageous embodiment of the crimping device according to the invention.

The edge surface on the end surface side of the plunger 52, which is manufactured as the sealing surface 53, is determined by taking into account the surface characteristics of the back surface of the flexible disk in the false twisting device, the intended surface pressure value in the crimping area, the amount of pressure medium consumption, etc. It is advantageous to manufacture it as shown in FIGS. 13 to 16. For example, a long gap passage between the air cushion chamber 51 and the outside air as shown in FIG. 13 or a labyrinth-like structure of the plunger end face 53 as shown in FIGS. 15 and 16 can reduce the pressure air consumption. The narrow edge surface shown in FIG. 14 also helps to form the crimp area sharply and tightly.

Advantageously, the plunger 52 has at its end end an air cushion chamber 51 in order to completely eliminate friction between the plunger and the rear side of the flexible disk. Plunger 52
It is also possible to configure as shown in FIG. That is, instead of the air cushion chamber 51 on the end face of the plunger, one or more pistons 49 are provided.
An axial air slit 54 is opened through the slit opening so that at any time a portion of the pressure medium can flow out, so that the crimping surface of the plunger 52 is lubricated. Such a slit is advantageous for elongated, for example oval, plunger end faces.

10 and 11 illustrate a crimping device according to yet another embodiment. According to FIG. 10, the cylinder-piston unit 15 is connected via ring-shaped channels 55 and 56 to two different sources of pressurized air. The embodiment of FIG. 10 has the following advantages. That is, the pressing force of the piston 49 or the plunger 52 is applied to the air cushion chamber 51.
It is independent of the amount of air supplied to the This is because the pressure force can be adjusted independently by means of a separate pressurized air supply via the annular channel 55, whereas the pressurized air supply to the air cushion chamber 51 is via the annular channel 56. Because it is done.

FIG. 11 shows a further embodiment of the cylinder-piston unit 15, in which instead of the action of a force caused by a pressure fluid, a force accumulator, for example a compression spring 58, a permanent magnet, an electromagnet, a weight, etc. or the like act on the plunger 52, which also acts independently of the dynamic action of the outflowing lubricant. The compression spring 58 is prestressed mechanically by an adjustable screw cap 59.

The supply of pressurized air for the pneumatic cushion takes place in this exemplary embodiment via a pressurized air supply line 57, which is connected to the ring-shaped channel 56. Air flows from this ring-shaped passage 56 to the inclined passage 6
0, the air is guided into the cushion chamber 51 through the axial hole 61 and the throttle 62.

17 to 25 schematically show different embodiments of details of a pressure medium-operated crimping device.

The crimping device in FIG. 17 has a cylinder 111,
This consists of two pressure medium inlet channels 112 and 120
Via it can be connected to two (not shown) sources of pressure medium, preferably a source of pressurized air. The pressure of the pressure medium in both conduits can be constantly adjusted at a predetermined value by means of conventional valves or throttle devices, in which case the crimping device can be adjusted to a predetermined value on a given multifilament yarn at an extremely high level in a given texturing machine adjustment state. Good processing effects can be provided. These values can be easily determined by simple tests.

The pressure medium inflow passage 112 is located inside the cylinder 11.
The piston 112 opens into the upper pressure chamber 121 and the piston 122 leaves the cylinder 11 until it reaches one end position defined by a stop, not shown, or until the pressure reaches a force equilibrium state. It is extruded until it is born again. The second pressure medium inflow passage 120 is connected to the piston 1
It opens into a pressure chamber 123 in 22 and is connected by an axial passage 124 to a subsequent distribution passage 125 in plunger 126 . Due to the pressurized air flowing out from the end side of the piston 122, an air cushion is formed between the end face of the plunger 126 and the back side of the flexible disk, which transmits the force of the piston 122 to the thread crimping area and also prevents contact and this Friction and wear due to contact is avoided.
FIG. 17 is a longitudinal sectional view of the plunger 126, and FIG.
The figure is a plan view of the end face of the plunger 126,
In this case, the pressure medium serving the air lubrication is supplied to the plunger 1 by means of a distribution channel extending along the thread tension line.
The liquid is distributed to a large number of holes 127 arranged on the end face of 26 and flows out. According to FIG. 19, the pressure medium is distributed into two parallel rows of holes 127, whereas according to FIG. The region 128 is made of porous material and is fitted into the end face of the plunger, which region can be designed, for example, in the shape of a curved line, if desired.

Furthermore, the piston 12 shown in FIG.
It is also possible to use a cylinder-piston unit with 9. In this case, the axial passage 124 for discharging the pressure medium necessary for air lubrication opens into one center restricting passage 130 (FIG. 22) or a ring-shaped passage opening in the end face of the plunger 126. The outflow holes 131 are distributed along the end surface of the plunger, for example, along the outer circumference.
(Fig. 23), porous circular surface 132 (Fig. 24)
Alternatively, a porous ring-shaped surface 133 (FIG. 25) is connected.

Since the end face of the plunger 126 is configured as shown in FIGS. 17 to 25, it is difficult to adjust the operating state and the operation is fast, compared to a crimping device having an air cushion chamber on the end face of the piston. High-frequency vibrations that occur when vibrations occur are suppressed.
The high frequency vibrations adversely affect the running stability of the thread 104 and generate unpleasant noise.

Furthermore, according to the experimental results, flexible
In order for the flexible disc to be stretched by centrifugal force, it is necessary to ensure that the crimping device is at a certain distance from the outer periphery of the flexible disc, for example 1 cm.

FIG. 26 shows a structurally very simple crimping device 65 in an advantageous embodiment of the false-twisting device according to the invention. In this case, the second twisting member is
As in the case shown, a rigid disc 26 and a flexible disc 27 are used.

A plunger 68, manufactured as a threaded pin, is screwed into a holder 67 with a thread 66, which is fixedly or removably connected to the machine frame. The plunger 68 has a pin head 69 which is easy to operate by hand, for example with a knurled groove, and by operating this pin head, the plunger 68 can be easily and quickly moved against the flexible disc 27 via the thread 66. Height can be adjusted. In the case of crimping devices made of the materials indicated by reference numerals 66 to 69, the crimping force exerted on the flexible disc 27 or the thread 14 is related to the relative position of the plunger 68 with respect to the flexible disc 27 and the rigid disc 26. ing. To prevent unintentional movement of the plunger 68, the plunger 68 may be secured by a suitable, easy-to-handle, known screw fastening device (not shown).

In order to be able to apply a spring-elastic and adjustable clamping force to the flexible disc 27, according to the false-twisting device shown in FIG. The axial bore is connected via a connecting conduit 71 to a source of pressurized air, not shown. The height of the crimping force is defined by the selected pressure value of the pressurized air, which causes the compressed air cushion to move between the end face of the plunger 68 and the flexible disk, as already explained in detail. It is formed.

According to the false twisting device of the invention shown in FIG. 27, a flexible disk 75 is made from a thin steel sheet, which has a ring-shaped friction lining 76 in the area of the thread tightening line. .

For crimping the disk 75 to the thread 14 carried on the disk 26, any one of the crimping devices 5, 6 or 65 can be used. The disk 75 has spring elasticity, and as a result, the disk 75 is pushed out from a plane perpendicular to the drive shaft 35 in the range of the yarn tightening line by the crimping device, and is pressed against the yarn 14. Disc 75 does not come into contact with the friction surface of rigid disc 26 in this case.

[Brief explanation of the drawing]

The drawings show an advantageous embodiment of the invention, in which FIG. 1 shows a false-twisting device consisting of two disks with different outer diameters, FIG. 2 is a sectional view of the false-twisting device of FIG. 1, and FIG.
Figure 2a is an enlarged view of a part of the cross-sectional view in Figure 2;
The figure shows a false twisting device similar to that of FIG. 1 with equal disk diameters and a separate yarn running path; FIG. 4 shows two flexible circles that are pneumatically crimped together. 5 and 6 are plan and side views of a false-twisting device with a friction surface consisting of a flexible disc on the one hand and a rigid roll on the other hand; FIGS. , Fig. 6a shows a variation of the embodiment shown in Fig. 6, Fig. 6b shows a textured processing machine with a number of false twisting devices shown in Fig. 6 arranged, and Fig. 7 shows a variation of the embodiment of Fig. 6. Sectional view showing the embodiment together with the drive device, No. 8a
Figures 8b and 9 are similar to figures 1, 2 and 3.
10, 11 and 12 are views showing still another embodiment of the crimping device, and FIGS.
4, FIG. 15, and FIG. 16 are views showing the configuration of the plunger end face of a crimping device having an air cushion chamber, FIG. 17, FIG. 18, FIG. 19, FIG. 20,
21, 22, 23, 24 and 25 show embodiments of a crimping device with a plunger made as a piston with fluid dynamic crimping surfaces of different configurations; 26th
27 are cross-sectional views of a false twisting device similar to that of FIG. 2. 5... Crimping device, 6... Crimping device, 7... Friction surface, 8
...Middle layer, 9...Bearing, 10...Support, 11...Flexible disc, 12...Toothed wheel, 13...Toothed belt, 14, 14a...Thread, 15...Cylinder piston unit, 16...Piston, 17...Cylinder ,
18... Plunger, 19... Supply conduit, 20... Intermediate layer, 21... Piston rod, 22... Pressing plate, 23
...Plunger, 24...Notch, 25...Nozzle, 2
6... Rigid disc, 27... Flexible disc, 28...
Rigid disk, 29... Flexible disk, 30... Drive shaft, 31... Boss, 32... Edge, 33... Tightening sleeve, 34... Shoulder, 35... Drive shaft, 36... Gap, 37
...Thread guide, 38...Crimp area, 42, 43...Flexible disc, 44...Drive shaft, 45...Drive shaft, 46
... Cylinder, 47 ... Supply conduit, 48 ... End surface, 49
... Piston, 50 ... Axial passage, 51 ... Air cushion chamber, 52 ... Plunger, 53 ... Seal surface,
54... Air slit, 55, 56... Ring-shaped passage, 57... Pressure air supply conduit, 58... Compression spring,
59... Screw cap, 60... Inclined passage, 61... Axial hole, 62... Throttle, 65... Crimping device, 66... Thread, 67... Holding body, 68... Plunger, 69...
Pin head, 70... hole, 71... connecting conduit, 75...
Flexible disc, 76...Friction lining, 10
3...roll, 104...thread, 105...crimping device, 1
06... Yarn pressure bonding area, 107... Flexible disk, 1
08... Axis, 109... Rotation direction of flexible disk, 110... Rotation direction of roll, 111... Cylinder, 112... Pressure medium inflow passage, 115... Drive shaft, 116... Yarn guide, 117... Yarn guide, 11
8... Swivel axis, 119... Swivel arm, 120... Pressure medium inflow passage, 121... Pressure chamber, 122... Piston, 123... Pressure chamber, 124... Passage, 125... Distribution passage, 126... Plunger, 127... Hole, 12
8... Porous material area, 129... Piston, 130
... throttle passage, 131 ... outflow hole, 132 ... circular surface,
133...ring-shaped surface, 150...thread guide, 151
...Thread guide, 203...Roll.

Claims (1)

[Scope of Claims] 1. A device for false twisting synthetic yarn in a textured processing machine, which twists the yarn by tightening the yarn between a moving surface and the end face of a rotating disk. In the case, the disc 27,2
9, 42, 43, 107 are made of a flexible material, and the flexible disk 27,
Synthetic yarn in a textured processing machine, characterized in that the yarn tightening line ranges 29, 42, 43, 107 are pressed from the back side of the disc toward the yarns 14, 104 by crimping devices 5, 6. false twisting device. 2 The moving surface is rigid, i.e. non-elastic and non-flexible, for example the end faces of rotating discs 26, 28 or rotating cylindrical or conical rolls 10.
3,203. The false twisting device according to claim 1, which is manufactured as No. 3,203. 3. The moving surface is the end face of a rotating disk 42 made of flexible material, and this flexible disk 42 is connected to the first flexible disk 43.
In the range of the crimping devices 5, 6, the threads 14,
10. The false twisting device according to claim 1, wherein the false twisting device is pressed by the crimping devices 5 and 6 toward the crimping device 104. 4. The false twisting device according to claim 2, wherein the axes 44, 45 of the disks 26, 27 are arranged substantially parallel to each other. 5. A false-twisting device according to claim 2, wherein the coating is attached to the rigid moving surface via an intermediate layer of soft material. 6. The false twisting device according to claim 2, wherein the flexible disk is unrotatably connected to the end face of one of the rigid disks, forming a friction surface on the rigid disk. 7. The rigid moving surface is the outer peripheral surface of a cylindrical or conical roll 103, 203, and the axis of rotation of the roll is the same as the direction of movement of the outer peripheral surface of the roll 103, 203 and the direction of movement of the flexible disk. Thread 1
The false-twisting device according to claim 1, which is pivotable in order to adjust the crossing angle α in the range of the tightening line of 04. 8 Flexible disc 2 that cooperates with the moving surface
7, 29, 42, 43, 107 are adjustable in order to change the angle of intersection at which the direction of movement of the disk intersects the direction of movement of the moving surface in the area of the clamping point. The false twisting device according to item 1. 9 Flexible disk 27, 29, 42, 43,
2. A false-twisting device according to claim 1, wherein the false-twisting device 107 is manufactured as a rubber disk having a thickness of 0.5 to 3 mm. 10 Flexible disk 27, 29, 42, 4
3,107 is made of two different materials,
One of the materials forms the friction surface and is an elastomeric chemical material, for example synthetic rubber based on acrylonitrile-butadiene-copolymer or polyurethane, and the other material is
located in a plane parallel to the friction surface of the disk,
Claim 1: Formed as a fiber layer or embedded cord fibers to increase tensile strength.
False-twisting device as described in section. 11 Friction lining 76 in which the disc 27 is ring-shaped
and has spring elasticity, and the disk 27
is pushed out from a plane perpendicular to the drive shaft 35 by the crimping devices 5, 6, 65 and presses the yarn 14 with a ring-shaped friction lining 76 against the other moving friction surface 26. The false twisting device described. 12 The crimping device has flexible discs 27, 29,
42, 43, 107 on the surface facing away from the thread side in the area of the thread clamping line and extending perpendicularly to the thread running path, post-adjustable, preferably spring-elastic. 2. A false-twisting device as claimed in claim 1, further comprising a post-adjustable plunger, along the crimping surface of which an air flow exits to produce a static air cushion. 13 The crimping device is the plunger 18, 23, 52,
126, and the plunger is connected to the flexible discs 27, 2 by the pressure generating devices 15, 58.
The false twisting device according to claim 1, wherein the crimping region 28 on the surface of the yarns 9, 42, 43, 107 opposite to the yarns 14, 104 can be pressed. 14 The length of the crimping surface of the plunger 18, 23, 52, 126 is larger than the width thereof, and extends over a part of the entire length of the yarn running path adjacent to the flexible disk, and the crimping surface of the plunger 18, 23, 52, 126 has a nearly point-like shape 14. The false twisting device according to claim 13, which forms a tightening region. 15 Claim 1 in which the crimping surface is curved in a convex lens shape, a cylindrical shape, or a spherical shape toward the thread running path
The false twisting device according to item 4. 16 The plunger 18, 23, 52, 126 or the end plate attached to the plunger is made of a material with a low coefficient of friction, such as graphite, or is open-celled and is enriched with a lubricant or is provided with a lubricant. The impregnated solid material creates a dry friction between the plunger 18, 23, 52, 126 and the disc 18, 23, 52, 126, and the crimping surface of the plunger or the end plate of the plunger. 15. The false twisting device according to claim 14, wherein the crimping region 38 is formed by the crimping region 38. 17. The plunger 52, 126 has an elongated axial passage 50, 61 for pressurized liquid or gaseous lubricant opening into a circular or ring-shaped crimping surface. false twisting device. 18. The false-twisting device according to claim 17, wherein the passages 50, 61 open at the crimp surface 53 of the plunger 52 and open into a chamber 51 having a sealing surface at the periphery of the opening. 19. Claim 18, wherein the length of the opening of the chamber 51 is greater than its width, and the longitudinal portion of the opening covers a portion of the yarn running path adjacent to the flexible disc. False-twisting device as described in section. 20 Passages 50, 124 are plungers 52, 12
18. The false twisting device according to claim 17, wherein the false twisting device is connected to a plurality of holes 127 or to a single porous surface in the crimping surface of the crimping surface of the crimping surface of the crimping surface of the crimping surface of the crimping surface of the crimping surface. 21. The false twisting device according to claim 13, wherein the pressure generating device is a cylinder-piston unit 15 loaded with pressurized air. 22 The piston 16, 49, 122 has a plunger 52, 126 at its free end, and an axial passage 50, 124 passes through the piston, which allows pressurized air to pass from the cylinder chamber to the plunger. 22. The false twisting device according to claim 21, wherein the false twisting device is supplied as lubricating air to the crimp surfaces of the wires 52 and 126. 23 The crimping device has a plunger, which is connected to the flexible discs 27, 29, 4
2, 43, 107, on the surface facing away from the thread side, in the area of the thread tightening line, a rear-adjustable, preferably spring-elastic rear The plunger is constructed as an adjustable plunger and has a notch 24 in its crimp surface.
The notch has discs 27, 29, 4
2, 43, 107 are open toward the front when viewed in the rotational direction of the disk, and the height of the notch is decreasing when viewed in the rotational direction of the disk, so that the crimping surface of the plunger 23 and the flexible disk 27, 29, 42, 43, 1
14. The false-twisting device according to claim 13, wherein an aerodynamic cushion is produced between the false twisting device and the yarn. 24 The fluid pressure in the crimping devices 5 and 6 is adjusted according to a predetermined program to produce effect yarns with textured processing parameters such as yarn count, crimp distribution, etc. changed according to the purpose. 21. The false-twisting device according to claim 20, wherein the twisting device is varied, preferably aperiodically.