EP3385207A1 - Spindle for a winder - Google Patents

Abstract

Spindle for a winder for winding one or more threads in each case a coil on at least one winding tube (19), wherein each winding tube (19) by at least one clamping ring (20) on a rotating sleeve (14) is clamped fastened, wherein the actuation the at least one clamping ring (20) is effected by means disposed within the sleeve (14), the means acting on the outer circumference of the spindle (1) along the spindle axis on the at least one clamping ring (20) and wherein the clamping ring (20 ) is arranged on a driving ring (21) which connects a spacer sleeve (18) with a spacer ring (23).

Description

The invention relates to a spindle for a winder for winding one or more threads to a respective coil on at least one winding tube, wherein each winding tube by at least one clamping ring on a rotating sleeve is clamped fastened.

Such spindles are used in winders or winding machines, which are wound with spun synthetic threads. For this purpose, one or more sleeves are attached one behind the other on the projecting spindle on the winders. For clamping the sleeves, the spindle has a clamping device, in which a cone or a spring system generates the necessary clamping force on the sleeves. The force on the cone requires a complicated mechanical arrangement within the spindle, which leaves little space for the storage of the spindle.

An alternative tensioning device provides spacers and catch rings made of plastic, which must be pushed back to their original position when loosening the sleeves. This is done by the elastic restoring forces of the clamping ring or by the use of O-rings, which compress the clamping ring. Since plastic parts begin to creep under load and time and thus deform plastically, the elastic restoring forces are smaller, making the sleeves are difficult to solve. This also increases the Outer diameter of the clamping elements, whereby the sliding of new sleeves is difficult.

The EP 2398727 B1 discloses a winding device for winding one or more threads, in which the sleeves are clamped by means of radially adjustable pins. The pins are moved via a slider along an inclined plane, which at the same time a radial displacement is connected. The construction of the clamping device is very complex and expensive and has the disadvantage that the pins perform a small axial movement during extension, which overlaps with the clamping action and damage the sleeves locally due to the frictional force.

It is an object of the invention to provide a spindle for a winder, which is inexpensive and has a high clamping force without the disadvantages described above.

The object is solved with the features of claims 1; the dependent claims describe advantageous embodiments of the invention.

According to claim 1, the object is achieved by a spindle for a winder for winding one or more threads to a respective coil on at least one winding tube, each winding tube by at least one clamping ring on a rotating sleeve is clamped fastened, wherein the actuation of the at least one Clamping ring is effected by means which are arranged within the sleeve, wherein the means on the outer circumference of the spindle along the spindle axis act on the at least one clamping ring.

The invention is characterized in that the at least one clamping ring is arranged on a driving ring, which connects a spacer sleeve with a spacer ring.

The arrangement of the clamping ring on a driving ring which connects a spacer sleeve with a spacer ring, allows a series connection with which the clamping force on the outer diameter of the spindle along its longitudinal axis can be passed from one to the next winding tube. At the same time the driving ring ensures that the clamping ring can not be compressed excessively and an almost uniform clamping force is exerted on all clamping rings, so that all the winding tubes are held with the same friction on the spindle.

The fact that the at least one clamping ring has a circumferential collar with individual sections on both end faces results in a slight deformability of the clamping rings.

Each section is designed to be in operative connection with the winding tube by clamping. The sections can thus independently exert a different clamping force on the winding tube. Unevenness and tolerances can thus be compensated.

Preferably, the sections are formed by mutual cuts. The incisions extend from a collar orthogonally through the periphery or surface almost to the opposite collar, leaving only a small web. In each case opposite sections of the collar are pressed outward and thus clamp the winding tube. Each section of a collar can thus create individually to the inner diameter of the winding tube, even if it is not exactly round.

Characterized in that each collar has a slope or ramp, which corresponds to a slope or ramp, which are arranged on the end faces of the spacer sleeve or spacers, causes a Compressive force on the outer circumference of the spindle in the longitudinal direction an extension of the clamping rings.

In order to avoid damage to the clamping rings during idle rotation, that is to say rotation of the spindle without a winding sleeve, the at least one clamping ring has at least one securing ring on its outer circumference.

In a preferred embodiment, the driving ring on each end face on a collar which engages in a recess of the spacer sleeve or the spacer ring. The driving ring thus connects the spacer sleeve with the spacer ring and at the same time prevents overloading of the clamping rings.

Preferably, each collar of the driving ring is divided by means of cuts in individual separate sections.

In a preferred embodiment, the means are designed as at least one spring, which can apply a pressure force on the at least one clamping ring by means of a lid. Within the spindle, a pneumatic or hydraulic piston chamber is arranged, which relaxes the pressure relief at least one spring acting on the outer circumference of the spindle. By virtue of the fact that the means for applying force are arranged inside the spindle, but the means act on the outer circumference of the spindle or on or along the circumferential surface, a free space for a modified bearing is created inside the spindle, by means of which the spindle can rotate at higher speeds and can be built with a larger overhanging length. The modified bearing, which is arranged within a rigid axis in the longitudinal center of the spindle, reduces the bending moments on the spindle, since the left and right of the storage takes place in each case the same load through cores. The at least one spring acts as energy storage, which compresses the clamping rings parallel to the spindle axis. As a result, the spindle can be made more massive, since the force curve does not run through the spindle shell at interruptions, but in the longitudinal direction of the spindle axis on the outer circumference or outer jacket.

In an advantageous embodiment, the material used for the clamping elements is polyamide or other engineering plastics, which may consist of PA6 or PA6.6 and have a much greater wear resistance and heat resistance than rubber. The use of a spring steel is possible.

• Fig. 1: einen Schnitt durch eine Spindel einer Wickelmaschine;
• Fig. 2: einen vergrößerten Schnitt durch die Spindel der Wickelmaschine;
• Fig. 3: eine vergrößerte Darstellung der Klemmfunktion;
• Fig. 4: eine perspektivische Darstellung auf einen Klemm- und Mitnehmerring.

The invention will be explained in more detail with reference to the accompanying drawings;
in these shows

• Fig. 1 a section through a spindle of a winding machine;
• Fig. 2 an enlarged section through the spindle of the winding machine;
• Fig. 3 : an enlarged view of the clamping function;
• Fig. 4 : a perspective view of a clamping and driving ring.

The spindle 1 according to the invention FIG. 1 is one of two spindles of a winder for continuous stripping and winding of multiple filaments produced by a spin-draw process. The spindles are arranged on a rotatable turret, not shown, which moves the spindles from a waiting position to an operating position. Each of the spindles has its own drive, which can be coupled to the drive and a positioning device of the revolver. In the operating position are usually two to four cores 19 on the spindle 1, which are held by clamping and on which the threads or filaments are wound into coils 8. At a certain length of a wound thread or a certain diameter reached the wound coils 8, the spindles 1 are moved from the operating to the waiting position, the thread separated and wound on the new winding tube. The finished coils 8 are removed from the spindle 1, in which the clamping elements, with which the winding tubes 19 are clamped on the spindle 1, are relaxed. Usually, the spindles 1 are mounted on one side. Because the cantilevered part of the spindles is between 300 can project up to 1800 mm from the turret and simultaneously act with the winding forces at high speeds of up to 16,000 rev / min an enormous one-sided load on the spindles, they must be stored very stiff and precise.

For this purpose, the spindle 1 a rigid and fixed axis 2, which is fastened by means of a flange 3 to a rotatable turret, not shown, of the winder. Within the axis 2, a drive shaft 4 is arranged, which is mounted next to the flange 3 outside of the winding area within the turret by means of a first drive bearing 5. A second bearing 7 is disposed at the opposite end within the rigid and fixed axis 2 in the winding area. In this case, the bearing 7 is arranged as far away from the flange 3 in the rigid axis 2, that is substantially in the longitudinal center of the spindle 1, to produce the lowest possible resonance at high speeds of up to 16,000 rpm.

Both bearings 5, 7 take a disposed within the axis 2 drive shaft 4, which has been extended by means of a bearing shaft 6. The longitudinal division of the inner driven shaft in a drive shaft 4 and a bearing shaft 6 allows on the one hand an axial fixation of the bearing 7, which can be supported in the transition region of the drive shaft 4 on the bearing shaft 6 on each of a left and right shoulder. On the other hand, the longitudinal division allows a simple and precise pre-assembly of the very long bearing 7 with the bearing shaft 6 outside the spindle 1. The drive shaft 4 and the bearing shaft 6 are connected by a not shown sealed coupling piece with screws. The bearing 7 preferably has a length which essentially corresponds to the length of a winding tube 19. On the bearing shaft 6, a sleeve 14 is inserted, which is designed as a so-called double sleeve and along its longitudinal axis to the opposite end faces each having a sleeve portion 14a and 14c, each forming a cavity 14b and 14d. The sleeve portion 14a with the cavity 14b thereby almost completely overhangs the rigid axle 2 up to the flange 3 and covers it as far as possible. The assembly of the sleeve 14 via a fastening 9, with which the sleeve 14 is screwed to the bearing shaft 6. The second sleeve portion 14 c with the cavity 14 d is arranged in the opposite direction to the free end of the spindle 1 and takes a spring assembly 10 with a plate 11. The spring assembly 10 is biased between the plate 11 and a spring seat 17 by means of a fastening 16. The spring support 17 is supported within the sleeve portion 14b at an unspecified paragraph. The cavity 14d of the sleeve portion 14c is closed by a cover 12 with a collar 13 which surrounds the sleeve portion 14b from the outside. Due to the tension of the spring assembly 10, which is supported on the spring support 17, the plate 11 is pressed in the longitudinal direction of the flange 3 in the sleeve portion 14 b. At the same time, the lid 12 is pressed with the collar 13 on the sleeve portion 14b, whereby the cavity 14d is almost closed.

After the FIGS. 2 to 3 are on the outer circumference of the sleeve 14 for each winding tube 19, a spacer sleeve 18 and a respective arranged on both sides spacer ring 23 is pushed.

Between the spacer sleeve 18 and the spacer rings 23 are each a clamping ring 20 is arranged, which sits with its inner diameter with a small gap on a driver ring 21. In this case, the spacer ring 23 bridges the gap between two winding sleeves 19, so that the axial force along the spindle surface is continuously passed from one to the next clamping ring 20 on. In the presentation of the FIG. 2 it can be seen that each spacer ring 23 on its circumference Has recesses, which are shown in the sectional view of the upper view as a gap. In fact, the spacer ring 23 extends over the edge region of two adjacent winding tubes 19.

The winding tube 19 can thus be held by two clamping rings 20 on the sleeve 14. The driver ring 21 has at each end edge an outer diameter enlarging collar 21 a, which corresponds to circumferential recesses 18 a, 23 a of the spacer sleeve 18 and the spacer rings 23. Each collar 21a engages in the recesses 18a, 23a of the spacer sleeve 18 and the spacers 23 so that they can not escape laterally under the winding tube 19 along the axial length of the sleeve 14. At the same time, however, the axial play between collar 21a and recess 18a, 23a is so great that it can be tensioned by an axial loading of the clamping ring 20 by the clamping ring 20 is acted upon at its end faces with pressure, thereby bending individual portions of the collar 20a upwards become. The recesses 18a, 23a are arranged in the region of the end faces of the spacer sleeve 18 and the spacer rings 23 and point with their open side to the inner diameter. The Mitnehmerringe 21 connect the spacer sleeve 18 with the spacers 23 and bring them when relaxing or loosening the cores 19 after clamping again in the correct position. In addition, they still serve as a stop when clamping, so that the spacers 23 and the spacer sleeve 18 are not pushed close to each other.

The clamping ring 20 is seated with its inner diameter with a gap on the driver ring 21 and also has on each end face a circumferential collar 20a, which increases the outer diameter. The inner diameter of the clamping ring 20 is larger than the outer diameter of the driving ring 21, so that both do not touch. The circumferential collar 20a has an inner diameter inclined towards slope or ramp, which with a slope or ramp, which is arranged on the end faces of the spacer sleeve 18 and the spacer ring 23, corresponds.

Each clamping ring 20 has alternating cuts 20b, 20c which extend from a collar 20a orthogonally through the periphery almost to the opposite collar 20a and thereby form portions 20a1, 20a2. For example, a portion 20a2 of a collar 20a is formed and bounded by two incisions 20c which almost reach to portion 20a1. The sections 20a1, 20a2 are simultaneously pressed against the winding tube 19 during a pressure load by the spacer sleeve 18 so that it is securely fixed even at high rotational speeds. Each partially opposite portions of the collar 20a1, 20a2 are pressed outward and thus clamp the winding tube 19. Each section 20a1, 20a2 of a collar 20a can thereby invest with its surface individually to the inner diameter of the winding tube, even if it is not exactly round.

In order to reinforce the elastic behavior of the collar 20a1, 20a2, a bore is arranged at the end of each incision 20b, 20c into which the incision 20b, 20c enters and ends. This prevents cracks and material breaks.

On the outer circumference, the clamping ring 20 has at least one recess 20d which can receive a locking ring 22 in a form-fitting manner in order to avoid excessive deformation of the clamping rings 20, for example during spindle rotations without a winding sleeve. In this embodiment, two recesses 20 d are mounted on the circumference of the clamping ring 20.

The driving ring 21 is smaller in inner diameter than the outer diameter of the sleeve 14. When pushed onto the sleeve 14 is the driving ring 21 is stretched, whereby it rests without play on the sleeve 14 and thus is easily clamped on the sleeve. In order to ensure sufficient elasticity of the driving ring 21, this also has changing cuts 21b, 21c, extending from a collar 21a orthogonal by the circumference almost to the opposite collar 21a and thereby form sections 21a1, 21a2. For example, a portion 21a2 of a collar 21a is formed and bounded by two notches 21c, which almost reach to the portion 21a1. In order to reinforce the elastic behavior of the collar 21a1, 21a2, a bore is arranged at the end of each cut 21b, 21c into which the notch 21b, 21c enters and ends. This prevents cracks and material breaks.

In the initial position, the cavity 14d (piston chamber) with pressure (pneumatic or hydraulic pressure) is applied, whereby the spring assembly 10 is compressed. The cover 12 with the collar 13 is operatively connected to the first spacer ring 23, in which they are integrally formed, or by means not shown connecting element or connecting ring. When the spring assembly 10 is compressed, the cover 12 moves away from the spindle with the collar 13, thereby pulling apart the spacer sleeves 18 and spacers 23, so that the pressure on the clamping rings 20 is reduced and these relax.

When loading the spindle 1, three cores 19 can be postponed according to this embodiment, which are positioned by a stop, for example in the form of a rocker arm on the spindle 1. To fix the winding tubes 19, the cavity 14d is depressurized, whereby the spring assembly 10 is relaxed. It thus presses the collar 12 of the lid 12 against the first spacer ring 23, which passes on the spring force on the first clamping ring 20 to the nearest spacer sleeve 18. Due to the series connection, all clamping rings 20 are compressed and fix the winding tubes 19th

The winding cores 19 are released again with the pressurization of the cavity 14d, whereby the spring assembly 10 is tensioned. By the Mitnehmerringe 21 all spacers 18 and spacers 23 are pushed back into its original position, so that the clamping rings 20 can relax.

In this embodiment, three cores 19 are pushed onto the spindle 1, which are fixed by two respective clamping rings 20. Alternatively, the winding tubes 19 can also be guided, for example, via a cone, not shown, and fixed with only one clamping ring 20. About a central arrangement of the clamping rings 20 and the fixation of the winding tube 19 would be sufficient with only one clamping ring 20.

Corresponding FIG. 1 the rigid axle 2 is firmly connected to the revolver, not shown, of the winder and thus fixed. Within the axis 2, the drive shaft 4 and the bearing shaft 6, which transmit the rotational movement to the sleeve 14 rotates. With the sleeve 14, all other associated components such as the spacers 18, the clamping elements 20 and the winding sleeves 19. Since the spring assembly 10 with the plate 11, the spring support 17 and the cover 12 is supported on the sleeve 14, rotate also these parts with. The arrangement of the bearing 7 approximately centrally in the spindle 1 reduces the bending load on the spindle 1, since this tends due to the one-sided storage and by the load through the winding tubes 19 to enormous vibrations.

According to the prior art, the clamping elements 20 are made of rubber or a rubber-coated spring steel, which, although a high elasticity, but are not resistant to wear. According to the invention the clamping ring 20 is made of a technical plastic, for example of a polyamide such as caprolactam (PA6) or an aliphatic polyamide of hexamethylenediamine and adipic acid (PA6.6), which has a lower elasticity, but a significantly greater hardness and wear resistance than the Clamping rings according to the prior art. The design of the clamping rings 20 is such that only a small axial deformation is required for a radial diameter increase. With regard to the hardness of the polyamide used in particular the cuts 20b, 20c, 21b, 21c are required, since otherwise the compressive forces in the circumferential direction in the polyamide are so great that they would adversely affect the radial diameter enlargement and destroy the clamping rings.

To FIG. 1 19 two clamping rings 20 are provided for each winding tube, which are separated from each other by spacers 18. The compressive force for clamping the winding tubes 19 is applied by the spring assembly 10, whose force is passed through the cover 12 via the collar 13 on the spacers 18 and thus on the clamping rings 20. Thus, the clamping rings 20 are connected in series from the outer end of the spindle 1 to the attachment to the turret and would pass less and less force due to their elasticity, if their axial deformability would not be limited. For this purpose, the driving ring 21 is provided below or within each clamping ring 20, which prevents excessive compression of the clamping rings 20 in the axial direction of the spindle 1 and thus enables a "continuous series connection" of the clamping rings.

Characterized in that was switched from a clamping system with an internal cone on series-connected wear-resistant and relatively (to rubber) hard clamping rings made of polyamide, which are force-loaded by a spring system in the axial direction, the interior of the spindle 1 is free for a modified storage, with a larger speed range can be covered and is inexpensive to produce and easy to assemble. Due to the space inside the spindle 1 and the new storage an extension of the cantilevered spindle from 600 mm to 1200 mm has become possible.

With the new design all located on the mandrel spacers 23 and spacers 18 are connected by Mitnehmerringe 21. When loosening the cores 19 all spacers 23 and spacers 18 are pulled by the arranged at the end of the spindle cylinder in its original position. The clamping ring 20 thus requires no restoring forces to move the spacers 23 and spacers 18. The clamping of the winding tubes 19 is also carried out by the deformation of the clamping rings 20, which are centered by the spacer rings 23 and spacers 18. The at least one locking ring 22, which is arranged on the clamping rings 20, prevents its excessive deformation. The driver ring 21 couples the spacers 23 and spacers 18 together and also serves as an axial boundary to avoid uneven displacement of the spacers 23 and spacers 18.

reference numeral

1

spindle

2

axis

3

flange

4

drive shaft

5

drive bearing

6

bearing shaft

7

camp

8th

Kitchen sink

9

attachment

10

spring assembly

11

Plate

12

cover

13

collar

14

shell

14a, c

sleeve section

14b, d

cavity

16

attachment

17

spring Plate

18

Stand Off

18a

deepening

19

mandrel

20

clamping ring

20a

collar

20a1

section

20a2

section

20b

incision

20c

incision

20d

deepening

21

driver ring

21a

collar

21a1

section

21a2

section

21b

incision

21c

incision

22

circlip

23

spacer

23a

deepening

Claims (10)

Spindle for a winder for winding one or more threads in each case a coil on at least one winding tube (19), wherein each winding tube (19) by at least one clamping ring (20) on a rotating sleeve (14) is clamped fastened, wherein the actuation the at least one clamping ring (20) is effected by means disposed within the sleeve (14), the means acting on the outer circumference of the spindle (1) along the spindle axis on the at least one clamping ring (20), characterized in that the at least one clamping ring (20) on a driver ring (21) is arranged, which connects a spacer sleeve (18) with a spacer ring (23). Spindle according to claim 1, characterized in that the at least one clamping ring (20) has on both end faces a circumferential collar (20a) with individual sections (20a1, 20a2). Spindle according to claim 2, characterized in that each section (20a1, 20a2) is designed to be in operative connection with the winding tube (19) by clamping. Spindle according to claim 2, characterized in that the sections (20a1, 20a2) are formed by mutual cuts (20b, 20c). Spindle according to claim 2, characterized in that each collar (20a) has a slope or ramp which corresponds to a slope or ramp which are arranged on the end faces of the spacer sleeve (18) or the spacer rings (23). Spindle according to one of the preceding claims, characterized in that the at least one clamping ring (20) has on its outer circumference at least one securing ring (22). Spindle according to claim 1, characterized in that the driver ring (21) on each end face a collar (21a) which engages in a recess (18a, 23a) of the spacer sleeve (18) or the spacer ring (23). Spindle according to claim 7, characterized in that each collar (21a) is divided by means of cuts (21b, 21c) into sections (21a1, 21a2). Spindle according to claim 1, characterized in that the means as at least one spring (10) are formed, which by means of a cover (12) can apply a compressive force directly or indirectly on the at least one clamping ring (20). Spindle according to one of the preceding claims, characterized in that the at least one clamping ring (20) made of a technical plastic, preferably made of polyamide.

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