RU67078U1 - THREAD WINDING DEVICE - Google Patents

Abstract

The device for winding the yarn from the package in a radial (tangential) way (Fig. 4) contains a bobbin holder 11 mounted on an axis 12 in the rolling bearings 13, carrying a package of 14 threads with a yarn carrier 15 mating with the bobbin holder 11. Braking by the rotated thread of the package 14 together with the bobbin holder 11 is made by turning around the axis 18 the copier 20, resting on the surface of the package and pressed against it by the force of the spring 21, which ensures the contact of the copier with the surface of the package while reducing its diameter in the process of winding the thread. The thread tension in this case is equal to the friction force between the copier and the package surface. The type of spring is selected depending on the requirements for the winding device from a number of springs: spiral, torsion, tension, compression.

Description

The utility model relates to the field of production of chemical fibers and the field of textile industry, it is used in creel crepes of spinning machines, weaving machines and other textile machines when winding thread from input packages in a radial (tangential) way: the thread coming off the surface of the package rotates this package by tension overcoming the force of resistance to rotation of the package. Important properties of the device for radial winding of the thread, contributing to their use, are: the possibility of winding the threads from thread carriers of complex shape - two-flange coils; maintaining the value of the initial twist of the reeled thread without change.

According to this method, the device for winding threads on twisting machines for the production of twisted products and their semi-finished products for technical purposes (spinning bast and chemical fibers and the production of twisted products. A textbook for universities VG Komarov, PN Ginzburg, VA Zabelin , N.S. Kulkov, L.G. Melamed. - M .: Light Industry, 1980 - 494 p., Ill., P. 359 fig. 180, p. 486 fig. 233 p. 447 fig. 217 pp. 397 rice 199, as well as A. Kostsov A. Machines of torsion production. - M. Light and food industry, 1981 - 272 p., P. 159).

A similar design of the device for winding yarn from the package was used in the creel of a loom to produce cord fabric for tires (Sokolov G.V. Production of a cord, - M. Light Industry, 1951, pp. 159-163).

In the design under consideration, a bobbin holder is put on the axis, made in the form of a sleeve, in the inner hole of which are installed

plastic liners forming a dry friction plain bearing with an axis. On the outer surface of the bobbin holder, a packing carrier is put on. When winding, the thread rotates the package with the bobbin holder on the axis and, due to the friction force in the sliding bearing, receives the tension determined by the formula

convertible to formula

for R ₁ ≤R _i ≤R _n

where M _Tp.i is the moment of friction in the rotation support;

Ti is the current thread tension;

A is the coefficient of proportionality;

R _i - the current radius of the package from which the thread is wound;

R ₁ is the radius of the yarn carrier, external;

R _n is the radius of the package at the beginning of the winding.

Function graph is a straight line 1 in figure 1. Proportional to the radius of the package, the change in tension when winding the threads during the torsion of the products leads to the diversity ("corkscrew") of the constituent threads and a decrease in the breaking load of the product. In the production of cord fabrics, due to such a change in the tension of the thread, “sagging” of individual sections of the fabric is formed, which are damaged during rubberizing.

Another reason for the uneven tension of the thread during winding is the instability of the coefficient of dry friction in long-term operation, which is caused by clogged bearings with industrial dust, wear products of plastic sleeves during running-in (Podshivalov R.N., Suslov N.I. Kapron machine parts, M., Mashgiz, 1961, p. 4).

Significant design flaws of this device are: large non-uniformity of thread tension, instability of the coefficient of dry friction in the supports of the bobbin holder, absence

the ability to control the level of thread tension in relation to the conditions of technological processes of torsion, weaving and other processes.

Matching features of an analogue and utility model: a bobbin holder carrying a package with a thread, having the ability to rotate under the action of the tension force of the thread when it is unwound; friction braking device for bobbin holder with thread packing.

In the application of Germany No. 10045104 “Shpulyarnik” (IPC D02H 1/00, D02H 13/26. Declared September 12, 2000 Publ. 04/25/2002), the device for winding the thread contains a bobbin holder made in the form of a cylindrical sleeve that can rotate on the axis. A package is installed on the bobbin holder, a thread carrier that is connected to the outer diameter of the bobbin holder so that the latter rotates with the package. There is a block on the bobbin holder, enveloped by a brake band, one end of which is fixed motionless, and the other is pulled by a spring. The braking torque can be adjusted by tensioning the belt. In this device, the thread tension is composed of 2 components:

where T _Σi is the tension of the thread _wound from the package;

T _1i - thread tension created by the moment of friction on the axis of rotation of the bobbin holder;

T _2i is the tension of the thread created by the moment of friction in the belt brake of the bobbin holder.

Tension T ₁ is determined by the above formula

graphically depicted in figure 1 line 1.

Tension T ₂ is determined by the formula

where M _c is the moment of resistance to rotation of the bobbin holder in the belt brake.

Since M _c is a constant value during the time of winding the thread from the package, the equation is a hyperbole, which is graphically depicted in figure 1 of curve 2.

Total tension

Graphically, this equation is shown in figure 1 of curve 3.

The coordinate of the curve's minimum point

Significant design flaws of the device for winding the thread with a tape brake are: the dependence of the uniformity of the tension of the thread on the magnitude of the moment of resistance in the tape brake changing the graph of curve 2 in figure 1; instability of the coefficient of dry friction in the supports of the bobbin holder, during running-in and due to wear during long-term operation; the increased tension of the thread created by the tape brake of the bobbin holder, ceteris paribus, which may not meet the requirements of the technological process, especially in weaving.

Matching features of an analogue and utility model: a bobbin holder carrying a package with a thread, having the ability to rotate under the influence of a thread tension when it is wound, an external friction braking device of a bobbin holder with a package of threads.

As a prototype of a utility model, the device for winding the thread used in the application of Germany No. 10045104 "Shpulyarnik" is adopted.

The general idea of creating a useful model is to exclude the influence of the changing mass of the package on the tension of the radially rewound yarn and to ensure the possibility of obtaining a lower and more uniform tension of the thread during external braking of the package. The technical solution to this problem contains two design proposals:

installation of bobbin holders on rolling bearings with rolling friction coefficient f _k = 0.0015 (Beiselman R.D., Tsypkin B.V., Perel L.D. Rolling bearings. Handbook. Edition 6th, revised and additional M ., Engineering, 1975, 572 pp., See p. 148, table 36), in which the thread tension when winding from the packages will be close to zero;

external braking of the package is carried out on the current surface of the package by a tracking copier, constantly pressed against it by a spring. In this case, the tension of the thread will be equal to the friction force between the copier and the package, and the change in tension will be proportional to the change in the deformation of the spring.

Figure 2 shows the graphs of the tension of the thread during braking of the package with a copier with a spiral spring, depending on the magnitude of the twist angle (number of revolutions) of the spiral spring φ. Line 4 is a graph of a given tension T _n at the beginning of winding the thread from the package. This value of T _n can be obtained using different springs having the same torque at different angles of rotation of the spring. Since the tension T _{n is} proportional to the value of the torque of the spring, for all springs

where A _i is the proportionality coefficient when applying the i-th spring;

φ _i - twist angle

Lines 5, 6, 7, 8 depict graphs of the tension of the thread during winding at various springs, where the final winding point corresponds to the tension Tk _i and the angle of _{rotation of the} spring φ _ki

where α is the angle of rotation of the copier and the end of the spring connected to it in the direction opposite to the initial twist angle.

Attitude

there is a hyperbole equation, on the graph of 9 of which all the end points of the graphs of the tension of the winded thread are located for various springs.

The horizontal asymptote of this hyperbola is the graph of the initial thread tension T _n . It follows that a spring with a greater initial deformation (twist angle) corresponds to a smaller deviation of the tension at the end of the winding from the initial tension at equal torques.

For example, at α = 30 ° depending on the number of revolutions of the twisting of the spring in the range from i = ½ to i = 3, we get:

i = ½, φ _cr = ½ · 360; \ tabT _{k1 / 2} = 0.833 T _n i = 1, φ ₁ = 1 · 360; \ tabT _k1 = 0.917 T _n i = 2, φ ₂ -2 · 360; \ tabT _k2 = 0.958 T _n i = 3, φ ₃ = 3 · 360; \ tabT _k3 = 0.972 T _n

The twist angle φ _cr = 180 ° refers to the torsion spring, since it is inappropriate to use a more complex spiral spring in this case. The graph 8 (figure 2) shows the ability to set any level of initial tension T _j within the characteristics of the spring.

Figure 3 shows the graphs of the tension of the thread during braking of the package with a copier with a tension or compression spring, depending on the amount of deformation S of the spring. The direction of deformation and the spring force in this case do not matter, since the force is structurally converted to torque, turning the copier in one direction. Line 4 is a graph of a given tension T _n at the beginning of winding the yarn from the package, which can be obtained using different springs, with the same effort at different deformations. The tension T _{n is} proportional to the force of the spring, therefore, the equality

where A _i is the coefficient of proportionality when using the i-th spring;

S _i - linear deformation of the i-th spring.

Graphs 5, 6, 7, 8, 10 depict the tension of the thread during winding with various springs.

Thread tension at end point

;

where h is the deformation of the spring when the copier is rotated in the direction opposite to the deformation of the spring at the beginning of winding;

ΔТ - deviation of tension from a given level.

Attitude - there is a hyperbola equation with a horizontal asymptote, which is a graph of T _n . From this it follows that the inequality

at

that is, a spring with a greater initial deformation corresponds to a smaller deviation of tension with the same spring force.

On the graph 10 (figure 3) shows the ability to set any level of initial tension T _j within the characteristics of the spring tension or compression.

In figure 2 and figure 3 there is no graph of the dependence of tension on the mass of the wrapped package, since the values of tension during rolling friction in the bearings of the bobbin holder are close to zero. For example, with a package weight of m = 6 kg, a rolling friction coefficient f _k = 0.0015, an average bearing diameter d ₀ = 25.0 mm and a package diameter D _n = 240 mm, acceleration g = 10 m / s ²

and is not taken into account in the calculations.

Technical results obtained using the utility model:

the ability to set at the beginning of winding the level of tension of the thread corresponding to the required level of tension of the thread in the technological processes of torsion and weaving;

maintaining the current thread tension when unwinding from the package within the specified acceptable values;

maintaining the stability of the set thread tension at the beginning and end of the winding from the package during long-term operation of the thread winder.

Matching features of the prototype and utility model: a bobbin holder carrying a package of filaments, having the ability to rotate under the action of the pulling force of the winding filament; external friction braking device for the bobbin holder with thread packing.

Distinctive features of the utility model: type of bobbin holder - spindle or hollow nozzle, depending on the landing diameter of the thread carrier of the wrapped package;

rolling bearings for installing the bobbin holder;

a copier mounted movably on the axis and resting on the surface of the wrapped package;

a spring for rotation around the axis and constant clamping of the copier to the surface of the wrapping package as its diameter decreases;

types of springs that can be used in the device: spiral or twisted, or tension, or compression.

Figure 1 shows the graphs of the tension of the thread when unwinding from the package without external braking and braking the bobbin holder with a tape brake.

Figure 2 shows the graphs of the tension of the thread when reeling from the package, the braking of which is carried out by a copier, pressed to its surface by a spiral spring and a torsion spring.

Fig. 3 shows the graphs of the tension of the thread when unwinding from a package, the braking of which is carried out by a copier, pressed to its surface by a tension or compression spring.

Figure 4 shows a device for winding a thread with a bobbin holder in the form of a hollow nozzle mounted on rolling bearings, with a copier, pressed to the surface of the package with a spiral spring.

Figure 5 shows a projection of the device winder thread (view A).

Figure 6 shows a device for winding threads with a bobbin holder in the form of a spindle mounted on rolling bearings, with a copier pressed against the surface of the package by a torsion spring.

7 shows a diagram of the clamping of the copier to the surface of the package by a tension spring.

On Fig shows a diagram of the clamping of the copier to the surface of the package by a compression spring.

In the design of all versions of the utility model shown in the drawings (Figures 4, 5, 6, 7, 8), engineering materials used by the industry were used: structural steel round and sheet, spring wire for torsion, tension, compression springs and carbon steel U7A ÷ U12A strip for a spiral spring, fluoroplastic - 4 for supporting the rotation of the copier, standard rolling bearings and fasteners.

For the manufacture of parts, metal-cutting and universal press equipment, with CNC, automatic machines, depending on the type and number of parts, performing typical technological operations, are used. Special materials, components, technological processes and equipment for the production of utility models are not required.

Use of the utility model can be carried out in the production of twisted products, cord fabrics and fabrics for technical use.

In the production of twisted products (twines, cords, as well as cables and strands for ropes and ropes), various types of reeling and twisting equipment are used: K-200-P, K-280-P flyer machines, K-176, TK ring-twisting machines -228-C, double torsion machines with a receiving spindle manufactured by Sima (Italy), TKD-500-T2 and other machines .. These machines are equipped with built-in or floor creel for setting the initial packages and winding threads from them

radially, while many machines are not equipped with devices that equalize the tension of the threads. When replacing the coiled packages with full ones as the yarn is triggered, the tension of the yarns from packages of different diameters will be different according to schedule 1 of the yarn tension in Fig. 1. When using the utility model “Device for winding the threads” in these crests, the tension of the threads will be more uniform (FIG. 2, graph 8, FIG. 3, graph 10), as a result of which the “corkscrew” will decrease and the strength of the twisted product will increase, especially when twisting the chemical fibers.

Weaving machines for the production of cord fabrics of various grades are mainly equipped with ShK-1440 creel pullers produced by the Oryol Khimtekstilmash plant, which do not have devices for leveling the thread tension. When replacing the original packages as the thread is triggered, a large difference in tension between the threads from packages of different diameters is formed. Earned in the fabric as the basis of the yarn with different tension during subsequent shrinkage in the fabric causes the "sagging" of its individual sections. The use of a real utility model in a creel helps to even out the tension of the threads in the fabric.

Obtaining technical results when using the utility model during operation is ensured by constructive solutions: the level of tension of the wound thread that meets the requirements of the technological process carried out on a textile machine is set by selecting and adjusting the force of the spring pressing the copier to the surface of the wound package. The frictional moment in the rolling support of the bobbin holder is negligible and does not have a significant effect on the tension of the winding thread, which in this case is proportional to the amount of spring deformation, that is, the thread tension corresponding to the requirements of the process can be set.

The magnitude of the change in the set tension in the device is proportional to the magnitude of the reduction in spring deformation towards the end of the thread winding, which is equal to the angle of rotation of the copier from the beginning to the end of winding the thread from the packaging for spiral and torsion springs or the movement of the loaded shoulder of the copier for tension and compression springs. Based on the acceptable value of the deviation of the thread tension - select the length of the working shoulder of the copier, providing a corresponding change in the deformation of the spring during the period of winding the thread from the package.

Saving the parameters of the thread tension during operation of the device is ensured by the stability of the structural dimensions of the copier and the characteristics of the spring. The use of the closed supports of the bobbin holder and copier eliminates the possibility of clogging and a significant change in the friction coefficient during long-term operation.

The device for winding threads from packages wound onto large diameter thread carriers (FIG. 4, FIG. 5) comprises a hollow bobbin holder 11 mounted on a fixed axis 12 on rolling bearings 13. A bobbin 14 is installed on the bobbin holder 11, the thread carrier 15 of which is locked by ball diameter the latches 16. The latches prevent shifting from the bobbin holder of the package during rotation. For the same purpose, it is possible, if necessary, to install the axis 12 at an angle to the horizontal from 5 ° to 15 °. A housing 19 is mounted on the fixed axis 18, on which a copier 20 is mounted, resting on the surface of the package 14 and pressed against it by a coil spring 21, the inner end of which is fixed in the copier body 19, and the outer end in the drum 22, which can rotate on the axis 18 and fixing the working position with the locking screw 23. To fix the copier 20 in the tilted position when installing the package 14 in the housing 19 of the copier 20, a L-shaped groove 24 is made in which the head of the pin 25 is mounted in the body of the axis 18. The fixed axes 13 and 18 are fixed to bars 26 creel housing.

The device for winding threads from packages wound on thread carriers whose inner diameter is insufficient to accommodate the rolling bearings (Fig. 6) comprises a spool bobbin 27 installed in the housing 28 on rolling bearings 13. A package 29 is installed on the bobbin holder 27, the thread carrier 30 which is locked on the inner diameter by a ball lock 16. On a fixed axis 18, a copier 20 is mounted on the plain bearing housing 19, resting on the surface of the package 29 and pressed against it by a spring torsion 31, one end of which is fixed in the housing 19, and the opposite end in the ring 32, which can be rotated on the axis 18 and locked in position by the locking screw 33. The copier 20 is locked in the tilted position as described above (Fig. 5).

In the device for winding the thread there is the possibility of using simpler to manufacture tension or compression springs. In the first case (Fig. 7), the copier is made in the form of a two-arm lever 34, one shoulder of which is loaded with a tension spring 35 so that the torque on the axis presses the working shoulder of the copier to the surface of the wrapped package. In the second case (Fig. 8), the copier is made in the form of a two-arm lever 36, one shoulder of which is loaded with a compression spring 37 so that the torque on the axis presses the working shoulder of the copier to the surface of the package being wound.

Before starting work, it is necessary to set the specified thread tension on the rewinder. For this, a full package 14 or 29 is installed on the bobbin holder 11 or 27, the copier 20 is lowered to the surface of the package. The thread from the package is fed into the working bodies of the machine, which is launched into operation. On a moving thread, the device measures the thread tension and adjusts the rings 22 or 32 to deform the springs 21 or 31 to obtain a given thread tension.

The regulation of the tension springs 35 or compression 37 is carried out by the adjusting nuts 38. It is necessary to sequentially configure each device in the creel. After that, the device is ready for operation.

For threading, the copier 20 is fixed in the tilted position in the L-shaped groove 24 with the stopper 25, the package of thread is installed on the bobbin holder so that the thread is unwound from the package “from under the copier”, the copier 20 is removed from the latch and lowered onto the package surface, the thread tucked into the working bodies of a textile machine. After refueling all the places, the machine is put into operation, with each thread at the beginning of the movement being pulled, overcoming the friction force on the contact line of the copier 20 with the surface of the package, and rotates the package. The tension of the thread during the winding process is maintained continuously, since under the action of the spring 21 or 31, or 35, or 37, the copier 20 is constantly pressed to the surface of the wrapped package. When the machine stops, the packages do not have a “run-out” due to the low speed of rotation and braking by the copier. The absence of complex structures ensures the reliability and stability of the operation of the device for winding the thread in operation.

Claims (1)

A device for winding yarn from packages by a radial (tangential) method on a textile machine, comprising a bobbin holder, carrying a yarn package, capable of rotation under the action of the tension of the wound yarn, an external friction braking device of the bobbin holder with a yarn package, characterized in that in order to increase the uniformity of thread tension made in the form of a spindle or hollow nozzle, the bobbin holder is mounted on the rolling bearings, and the bobbin holder braking device with thread packing is made in the form of mounted copier movably on the axis and resting on the surface of the rewind package, which can be rotated around the axis and constantly pressed by the spring to the surface of the package in the process of reducing its diameter, while the tension at the beginning and end of winding the thread from the package is determined by the parameters of the spring selected from those that can be used types of springs: spiral or torsion, or tension, or compression.