JPS6356329B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A friction false twisting machine having two movable surfaces, these surfaces contact each other approximately in the yarn running plane and clamp the yarn to be false twisted between them. publicly known (Federal Republic of Germany Patent Application Publication No.
2928522.1 specification). One of the surfaces is constructed as a rotating, flexible disk which can accept relatively high tensile forces, but only small bending forces. In order to tighten the thread, a crimping device is provided on the back side of this flexible disk, and this crimping device is applied exclusively to the desired thread tightening area on the back side of the flexible disk, and is oriented relative to the axis of rotation. causes a deformation of the soft disc from the vertical plane. The two discs therefore contact and tighten the thread only in narrowly defined predetermined areas.
According to the known friction false twister described above, the other surface can also be produced as a flexible disc as described above with a crimping device. However, it is also possible to manufacture the other disk as a rigid disk, ie with high bending strength, or as a roll.

A particular advantage of this friction false twister is that, in addition to twisting, a conveying or feeding action is applied to the yarn.

The object of the invention is to improve the known friction false-twisting method and friction false-twisting machine so that, on the one hand, the twisting ratio for the conveyance or feed of the yarn is variable and, on the other hand, it is possible to change the twisting ratio from S to Z. The purpose is to make conversion easily possible.

The invention solves the above problem in that at least one disk, preferably both disks, are mounted substantially perpendicularly to themselves and perpendicularly to the thread path, It is also proposed that the crimping device be adjustable and positionable in the direction of the thread path.

According to advantageous embodiments of the invention as claimed in claims 5, 6 and 7, special mechanical means make it possible to synchronize the movement of the bearing and the movement of the crimping device. , so that both bearings always have the same distance from the thread line and the crimping device is automatically adapted to the position of the bearings.

According to an advantageous embodiment of the invention, the yarn guide, in particular the inlet yarn guide, belonging to the friction false twister and the crimping device are connected rigidly and relatively immovably. As a result, the distance between the yarn guide and the crimping device or the yarn twisting point defined by the crimping device is always maintained equal. This means that under the same twisting and crimp conditions,
is important.

The invention is essentially independent of the direction of thread travel. The threads can run parallel to an axial plane common to the axis of rotation of both disks, or, as particularly shown in the examples, also perpendicular to said plane. Can be done. The concept of "axial plane" also includes a substantially flat surface when both rotational axes are straight lines slightly inclined in opposite directions and a perfect plane is not formed between the two axes.

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

The friction false twister shown in FIGS. 1a, 1b and 3 consists of a rigid disk 1 and a flexible soft disk 2. The friction false twister shown in FIGS. Both discs have axes 3 and 4
It is rotatably supported by bearings 5 and 6, and is driven via belt pulleys 27 and 28 by a drive device (not shown). The rigid disk 1 has a friction lining 26, which can be made of, for example, rubber, Vulkollan, wear-resistant metal, plasma coating, ceramic coating, nickel diamond coating, etc.

The flexible disc is a single material or possibly a mixture of materials which, on the one hand, is capable of absorbing the tension generated by centrifugal forces and, on the other hand, is susceptible to irregular deformation and/or bending. It consists of This flexible disc is, for example, 0.5~
It can be a 2 mm thick rubber disc with an inserted cord thread on its back side to increase the tensile strength, or a rubber disc of less than 1 mm thickness with a ring-shaped friction lining. It can be a spring steel disc.

The flexible disc 2 is deformed into a concave shape by being loaded by the pressure surface 7 on the dorsal side by the crimping device 10, and is thereby bent out relative to the thread 14. The thread is thereby tightened in a narrow area between the soft disc 2 and the ring-shaped friction surface 26 of the rigid disc 1.
The crimping device 10 consists of a cylinder 9 and a piston 8 movable within the cylinder 9, which piston 8 has a notch 13 in its pressing surface 7 facing the soft disk 2 side. The cylinder is the pressure air connection 1
1, whereby the piston is pressed against the soft disk on the one hand, and pressurized air is forced into the recess 13 on the other hand. This creates a pressure-air lubrication and a pressure-air cushion between the pressure surface 7 and the flexible disc 2.

In FIG. 1a, the thread 14 is connected to the entrance thread guide 22.
through the friction false twister in a direction perpendicular to a common axial plane containing both axes of the discs 1 and 2.

In FIG. 1b, the thread is passed through the inlet thread guide 22 parallel to a common axial plane containing both axes.

In the FIG. 3 embodiment of the invention, bearings 5 and 6 and crimping device 10 are adjustable. For this purpose, the bearings 5, 6 have guides by which they can be slid along parallel sliding rods 15, 16. Screws 17 and 18 serve for fixation. This allows the disc to move between the inner end position 29 and the outer end position 3 shown in FIGS. 1a and 1b.
It is possible to move between 0 and 0. The travel distance is limited by stoppers 31,32. Therefore, positioning is performed such that both axes or both axes have equal distances from the yarn line.

Similarly, the crimping device 10 can be moved along the rectangular rod 19 and fixed in position by means of screws 20, also in end positions 24.1 and 25.1.
The position can be fixed between 24.2 and 25.2 as well as between 24.2 and 25.2.

In FIG. 1a, the end positions 24.1 and 25.1 of the crimping device correspond to the disc inner end position 29, and the positions 24.2 and 25.2 correspond to the disc outer end position 30. When the discs 1 and 2 rotate in opposite directions, the fed yarn is given a Z-twist at position 24 of the crimping device and an S-twist at position 25 of the crimping device. End positions 24.1 and 2
The movement between 4.2 and 2 is performed when it is desired to change the ratio between the degree of twisting and the amount of feed when producing a Z twist.

Between the illustrated end positions 29, 30 of the disk and the end positions 24.1-24.2 of the crimping device for the Z-twist in each intermediate position and also the end positions 25.1-25.2 of the crimping device. between can be selected for the S-twist at each intermediate position, and selecting these intermediate positions is advantageous in effecting the intended false twist.

The twisting of a friction false twister is related to the distance of the yarn guide, in particular the inlet yarn guide, from the twisting point, ie the point at which the twisting moment is applied. In the friction false twister of the present invention, this twisting point is defined by the position of the crimping device. In order to ensure a constant distance, the inlet thread guide 22 and the crimping device are mechanically connected to each other by a rod 21. This is illustrated in FIG. 2, which concerns a friction false twister having the yarn path shown in FIG. 1a. As can be seen from the drawing, the length of the rod 21 is the same as that of the thread guide 22.
is chosen so that it does not come into contact with the disc even when the crimping device is in its lowest position 25.1.

As can be seen in FIG. 1b, in the yarn path formed here, for the conversion from S-twist to Z-twist, the inlet yarn guides are moved to opposite sides of an axial plane common to both axes. ing.

In this yarn path, which is shown in FIG. 1b, a change in the direction of rotation is necessary for the S-twist-Z-twist conversion. These directions of rotation of the disc are indicated by arrows S and Z.

As can be seen from FIG. 3, in the exemplary embodiment shown, the adjustment movements of the bearings 5, 6 and the crimping device 10 take place synchronously.

For this purpose, each bearing 5 and 6 is pivotally connected to the crimping device with a lever 67 or 68. By movement of one movable part (bearing or crimping device), the other movable part is also adjusted and positioned.

In the embodiment of the friction false twister according to the invention according to FIGS. 4a, 4b and 5, again a rigid disc 1 and a flexible flexible disc 2 are mounted on shafts 3, 4 by means of bearings 5, 6. has been done. The crimping device 10 acts on the back side of the flexible disc 2 with a piston 8 moving in a cylinder 9 and having a pressure surface 7, in this case also a pressurized air connection (not shown).
can be provided. In this example, thread 14
runs perpendicular to the axial plane containing both rotational axes, in which case it is also possible for the rotational axes to be somewhat inclined. This is because in this case the discs can have a minimum mutual spacing in the area of the pressing surface. The bearings 5, 6 of the two discs can be adjusted and moved along linear guides 35, 36 and fixed in position by fixing screws 37, 38. Adjustment spindle 4 for adjustment movement
3, 47 are useful, these are belt wheels 48, 49
They are also connected to each other in a transmission movable manner by a belt, and can be rotated by applying a screw spanner to the screw head 45. The twist of the spindle is caused by the bearings 5 and 6 being connected to the spindles 43 and 44.
are designed to move in opposite directions during synchronous rotation.

During this movement, the crimping device 10 slides along an arcuate sliding guide surface 42 concentric to the axis 4, in which case the support device 40 of the crimping device slides along the guide 39.
It is linearly guided inside and pressed against a sliding guide surface 42 by a spring 41. As a result, the crimping device, together with the functionally important parts 7, 8, 9, automatically assumes the position defined by the shape of the sliding guide surface 42 in relation to the axial spacing of the two discs.

Threaded nuts 46, 47 are fixedly connected to bearings 5 and 6 for this purpose.

The above-mentioned linear adjusting movements of the two bearings 5, 6, which take place together with the discs 1 and 2, cause the ratio of the twisting and feeding effects of the friction false twister on the yarn to be changed. In this case, in the working position of the friction false twister according to FIG. 4b, an S-twist is imparted to the incoming yarn in the yarn running direction 33 and in the disc rotation direction 23.

The illustrated friction false twister can be pivoted 180 DEG about a pivot pin 60 to change the direction of twisting, and can be secured to the machine frame by screwing screws 61 into holes 65. This pivoting position for Z-twisting of the friction false twister is illustrated in FIG. 4a.

The conversion from S-twist to Z-twist is carried out with the following formation.

The friction false twister is driven by a weave 50 via a tangential belt 51, the warp 50 being supported in the frame of the friction false twister. The rotational movement is caused by a belt pulley 58 by a transmission 52.
is transmitted to an intermediate shaft 53 having a The endless belt 54 is stretched between a belt pulley 58, a drive belt pulley 55 for a soft disk, a deflection roll 56, and a drive belt pulley 57 for a rigid disk. The deflection roll 56 is mounted in a bearing 62, which can be adjusted along a linear guide 63 by means of a screw 64 and fixed in position for tensioning the belt. The direction of movement of the tangential belt is S
It is not reversed for conversion from twist to Z-twist and vice versa. This is because the same texturing machine often produces crimped yarns that are falsely twisted into S-twist and Z-twist at the same time. In FIGS. 4a and 4b, the direction of movement of the tangential belt 51 is from the rear side toward the viewer with respect to the plane of the drawing. In this case belt 52
The directions of movement of and 54 and the direction of rotation of the disc are as shown.

The schematically illustrated embodiment in FIG.
It has discs 1 and 2 and a crimping device 10. The bearing 5 is stationary in this friction false twister, whereas the bearing 6 can be adjusted on the linear guide 36 and fixed in position. The configuration of the linear guide is the same as in the other embodiments. The crimping device 10 is mechanically connected to the bearing 5 via a lever 67 pivoted on both sides and to the bearing 6 via a lever 68 pivoted on both sides. By adjusting the bearing 6 and fixing the position, the crimping device 10 is therefore automatically moved into a predefined position for the device.

For the pivotal connection of the levers 67 and 68, use can be made of the bearings or any pivot pins provided in their area or the axes 3, 4 of the friction discs 1, 2.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1a shows the end face of a disc of a friction false twister through which the yarn is passed perpendicular to a plane common to both axes of rotation of the friction false twister. Figure 1b is a diagram showing a friction false twister in which yarn is passed parallel to a plane common to both rotational axes of both disks, and Figure 2 is a crimping device with an entrance yarn guide. A partial cross-section of
Figure 3 is a cross-sectional view of the friction false twister in Figure 1a, Figure 4a
4b and 5 are diagrams showing another embodiment having an S twist-Z twist conversion mechanism, and FIG. 6 is a schematic diagram of still another embodiment. 1, 2... Disk, 3, 4... Shaft, 5, 6... Bearing, 7... Pressing surface, 8... Piston, 9... Cylinder, 10... Crimping device, 11... Pressure air connection Part, 13... Notch, 14... Thread, 15, 16...
...Sliding rod, 17, 18...Screw, 19...Square rod, 20...Screw, 21...Rod, 22
... Entrance thread guide, 23 ... Disc rotation direction, 2
4, 25...Position, 24.1, 25.1, 24.
2, 25.2... End position, 26... Friction lining (friction surface), 27, 28... Belt wheel, 29
...Inner end position, 30...Outer end position, 31
... Stopper, 32 ... Stopper, 33 ... Yarn running direction, 35, 36 ... Straight line guide, 37, 38
... Fixing screw, 39 ... Guide, 40 ... Support device, 41 ... Spring, 42 ... Guide surface, 43, 44
... Adjustment spindle, 45 ... Screw head, 4
6,47...Natsuto, 48,49...Belt wheel,
50...Warb, 51...Tangential belt, 52
... Transmission, 53 ... Intermediate shaft, 54
... Endless belt, 55 ... Drive belt, 5
6... Deflection roll, 57... Drive belt wheel, 58
... Belt wheel, 60 ... Swivel pin, 61 ... Screw, 62 ... Bearing, 63 ... Linear guide, 64 ...
Screw, 65... hole, 67, 68... lever.

Claims (1)

[Scope of Claims] 1. A friction false twisting machine for false twisting and texturing synthetic yarns, which is rotatable around axes that are parallel to each other or slightly inclined to each other. 2.
two discs, the thread being clamped between the discs in a region of their end faces, in which case at least one disc of pliable or elastic material is pressed by a crimping device. In the type that is pressed against the thread, the bearing 6 of at least one of the discs 2 is adjustable and movable by the linear guide 36 approximately parallel to a common axial plane with respect to the rotation axes of both discs 1 and 2. and can be fixed in position,
A friction false twisting machine for false twisting and texturing synthetic yarns, characterized in that the crimping device 10 is adjustable and movable along the yarn path and can be fixed in position. 2. The thread guide 22 is mechanically and relatively immovably connected to the crimping device 10, and the thread guide is held in a predetermined position relative to the crimping device. The friction false twisting machine described. 3. The bearings 5, 6 of both discs 1, 2 can be adjusted and moved and fixed in position by linear guides 15, 16; 35, 36 aligned in a straight line, and the crimping device 10 can be moved by linear guides 19; 2. A friction false twisting machine according to claim 1, which is adjustable and movable in a direction perpendicular to the linear guide of the bearing. 4. The bearing 6 of one disc 2 is adjustable and positionable by a linear guide 36, and the crimping device is adjustable by a guide (lever) along an arc centered on the rotation axis of the stationary bearing 5. The friction false twisting machine according to claim 1, which can be fixed in position. 5 Each crimping device 10 has one pivot lever 6
The friction false twisting machine according to claim 1, wherein the friction false twisting machine is connected to the bearings 5, 6 of both discs 1, 2 by means 7, 68. 6. The friction false twisting machine according to claim 5, wherein the lengths of the swing levers 67, 68 are adjustable. 7. The friction false twisting machine according to claim 1, wherein the crimping device 10 is guided along an arcuate sliding surface 42 centered on the bearing 6 of the soft disc 2. 8 linear guide 15 of adjustable bearings 5, 6;
16; 35, 36 extend in such a way that the discs 1, 2 can be exchanged into their right-hand and left-hand positions when viewed in the axial direction, and the guide 1 of the crimping device 10
9; 39 passes through a common axial plane of both rotational axes. The friction false twisting machine according to claim 1. 9 Bearings 5, 6 of both discs 1, 2 for adjustment movement
are each driveable by one spindle 43, 44, and the spindles are transmissionly connected to each other, and the thread pitches of both spindles impart mutually opposite adjustment movements to the bearing, A friction false twister according to claim 3 designed. 10 The friction false twister has a tangential belt 51 which moves in a circular manner along the longitudinal direction of the machine, and a warb which is communicably connected to the shafts 3, 4 of the discs 1, 2 and is bearing on the friction false twister. Driven by 50,
In addition, the warb 50 is supported with its axis perpendicular to an axial plane 59 common to both axes of rotation of the disk, and is substantially halved by the axial plane 59, and has a frictional temporary. The twister is capable of pivoting 180° about a pivot axis (pin 60) located in the axial plane, and
The friction false twister according to claim 1, wherein the friction false twister is in contact with the warb 50 on the side opposite to the friction false twister. 11 A friction false-twisting machine for false-twisting and texturing synthetic yarn, which is capable of converting from S-twist to Z-twist and vice versa; each disc has a friction surface that contacts the thread, and at least one of the discs is a thin and flexible disc; (b) it has a bearing, and the bearing bearing the discs for rotation about axes arranged parallel to each other and spaced apart, and in this case the friction surfaces acting on the yarn are opposed to each other to form a yarn false-twisting zone between them. (c) a crimping device; (d) the crimping device is placed in a first position on one side of a plane defined by the axis of rotation of the disc and on the other side of the plane; and (e) a drive device for rotating each of the disks about their respective axes. in which the yarn is continuously passed through the false twisting zone, so that the yarn is exposed to both opposing friction surfaces created by the force exerted by the crimping device. Based on this, the yarn is selectively given an S twist or a Z twist by selectively placing the crimping device in the first position or the second position. A friction false twisting machine. 12. The device supporting the crimping device has a device for selectively moving the crimping device along a thread path extending in a direction substantially perpendicular to the plane defined by the axis of rotation of the disk. 12. The friction false twisting machine according to claim 11, wherein the twisting ratio to the yarn speed is selectively changed by selectively moving the crimping device. 13 The disc bearing device has a device for selectively moving the disc relatively in a direction substantially perpendicular to the rotational axis of the disc and substantially parallel to a plane defined by the rotational axis. 12. The friction false twister according to claim 11, wherein the twisting ratio relative to the yarn speed is selectively changed by selectively moving the disc relative to the crimping device. 14. said drive device being able to drive the discs in rotation in opposite directions, in which case the yarn is caused to pass through the false twisting zone in a direction perpendicular to the plane defined by the axis of rotation of the discs; and the conversion from S twist to Z twist and vice versa is achieved by selective positional change of the crimping device to the first and second positions without changing the direction of rotation of the disc or the yarn path. A friction false twisting machine according to claim 11. 15 The drive device is capable of rotating both disks in the same direction and has a device for reversing the rotational direction of both disks, in which case the thread is connected to the first and second disks of the crimping device. In each position of 2, the false twist zone is passed parallel to the plane defined by the axis of rotation of the disc, and based on this, the transformation from S to Z twist and vice versa is
Claim 11 achieved by selectively changing the position of the crimping device into the first and second positions, positioning the yarn path through the false twisting zone and changing the direction of disk rotation. Friction false twisting machine as described in section. 16 A friction false twisting machine for false twisting and texturing synthetic yarn, which is capable of false twisting from S twist to Z twist and vice versa, comprising: (a) a pair of false twisting disks; each disc has a friction surface that contacts the thread, and at least one of the discs is a thin and flexible disc, and the pair of discs are parallel to each other. rotatable about axes spaced apart from each other, and having friction surfaces in contact with the yarn facing each other and forming a false twist zone between the friction surfaces; b) A crimping device is provided, and the crimping device is configured to locally apply a pressing force toward the other flexible disk to a portion forming the false twist area of the one flexible disk. (c) It has a drive device that rotates each of the above-mentioned disks in opposite directions about their respective axes, and
In this case, the yarn is guided along a yarn path through the false twisting zone in a direction perpendicular to the plane defined by the axis of rotation of the disc, and in this case the yarn is connected to each friction surface located opposite to one another. Due to the frictional contact based on the force exerted by the crimping device,
(d) the bearing device and the crimping device of the disk are located substantially within a plane defined by the axis of rotation of the disk, and there is a gap between the friction surfaces of the disk; Based on this, by changing the direction of rotation of the disk, it is possible to change from S twist to Z twist without changing the yarn path. The reverse conversion is possible,
A friction false twisting machine characterized by: 17 In the friction false twisting method in which synthetic yarn is false twisted and textured, the false twisting direction is changed from S rubbing to Z twisting and vice versa: (a) a pair of false twisting circles; plates, each disk having a friction surface in contact with the thread, at least one of the disks being a thin flexible disk, and both disks spaced parallel to each other; (b) using a pair of false twisting disks which are rotatable about an arranged axis and which are arranged with their respective friction surfaces in contact with the threads facing each other, and (b) a crimping device; The flexible disk is placed in a first position on one side of a plane defined by the rotation axes of both disks, and a pressing force is applied to a portion of one of the flexible disks toward the other disk. acting to form a first false-twisting zone; , and in doing so, the disks are rotated in opposite directions about their respective axes, and the force exerted by the crimping device between the threads and the respective friction surfaces located opposite to each other. (d) placing the crimping device in a second position on the other side of the plane defined by the axis of rotation of the disk; applying a local pressing force to one of the discs toward the other disc to form a second false-twisted area that matches the yarn path and cause the yarn to pass through the second false-twisted area; This makes it possible to convert from S twist to Z twist or vice versa without changing the rotating direction of the disc or the yarn path. Twisting method. 18 In the friction false-twisting method in which synthetic yarn is false-twisted and textured, and the false-twisting direction is changed from S twist to Z twist and vice versa, (a) each disc is It has a friction surface that comes into contact with the
and at least one of the disks is a thin flexible disk, and both disks are rotatable about axes spaced parallel to each other, and each friction surface is in contact with the thread. (b) using a pair of false-twisting discs arranged opposite to each other; (c) applying a pressing force to a portion of one of the flexible discs toward the other disc to form a first false-twisting area; in a common direction about the respective axes of the disks, and in this case passing the yarn through the first false twisting zone in a direction parallel to the plane defined by the axis of rotation of the disk. passing along the path, thereby imparting a twist to the yarn by frictional contact between the yarn and each opposing friction surface based on the force exerted by the crimping device; and (d) said crimping device. is placed in a second position on the other side of the plane defined by the axis of rotation of the disks, and locally applied to a portion of said one flexible disk toward the other disk. Applying a pressing force to form a second false-twisted area and to form a yarn path through said second false-twisted area in a direction parallel to the plane defined by the axis of rotation of the disc. , and reverse the rotation direction of each disk,
A friction false-twisting method for false-twisting and texturing synthetic yarn, which is characterized by changing the false-twisting direction from S-twist to Z-twist or vice versa. 19 In the friction false-twisting method in which synthetic yarn is false-twisted and textured, and the false-twisting direction is changed from S twist to Z twist and vice versa, (a) each disk is It has a friction surface that comes into contact with the
and at least one of the disks is a thin flexible disk, and both disks are rotatable about axes spaced parallel to each other, and each friction surface is in contact with the thread. (b) using a crimping device to attach a portion of one flexible disk to the other; (c) rotating each of the above-mentioned disks in opposite directions about their respective axes; , the crimping device guides the yarn along the yarn path through the false twisting zone in a direction perpendicular to the plane defined by the axis of rotation of the disc, and connects the yarn to each friction surface facing each other; (d) positioning the disk and the crimping device substantially within a plane defined by the axis of rotation of the disk; defined by the friction surfaces by turning 180° between the friction surfaces of the disks about an axis extending parallel thereto and changing the axial position of the disks relative to the thread path. One of the discs, which was located on the front side of the plane, is positioned on the dorsal side of the plane,
Then, the other disk, which was located on the back side of the plane, is now positioned on the front side of the plane, and based on this, the change in the false twist direction from S twist to Z twist, or vice versa, is performed on the yarn. A friction false-twisting method for false-twisting and texturing synthetic yarn, which is characterized in that it is carried out by changing the direction of rotation of a disk without changing the path.