Spinning mechanism for covering yarn

Abstract

The invention relates to the technical field of spinning equipment, in particular to a core-spun yarn spinning mechanism which comprises a roving bobbin, a rear roller, a middle roller, a front roller, a yarn guide hook, a spindle, godets, a spinning cake and godet wheels, roving of the roving bobbin sequentially passes through the rear roller, the middle roller and the front roller, the spinning cake is placed on the two godets, and the godet wheels are arranged on the two godets. The spandex yarn released by the spinning cake is guided into the front roller through a godet wheel and is matched with the roving in a core-spun mode, and the core-spun yarn obtained after core-spun is completed passes through a yarn guide hook and then is wound on a spindle; and a tension adjusting device for tensioning spandex filaments between the godet wheel and the spinning cake is arranged between the godet wheel and the spinning cake. By means of the design of the tension adjusting device, the situation that the tension of spandex filaments changes in the unwinding process can be adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of spinning equipment, and in particular to a spinning mechanism for core-spun yarn. Background Art

[0002] Spandex core-spun yarn fabric has good elasticity and is therefore very comfortable to wear. The spinning process of spandex core-spun yarn has strict requirements. It is mainly composed of coarse yarn and spandex yarn. The spandex yarn is the core thread, and the outside of the spandex yarn is wrapped with cotton, wool or chemical staple fiber aggregate to form a spandex core-spun yarn. The spinning device of spandex core-spun yarn is modified from the ring spinning frame, and is equipped with a pair of spandex guide rollers. The roving passes through the rear jaw composed of the rear roller and the rear leather roller, the middle jaw composed of the middle roller and the rear leather roller, and the front jaw composed of the front roller and the front leather roller in turn. The spandex yarn passes through the guide wheel and is accurately positioned and fed into the middle of the roving strip composed of short fibers flattened by the front roller and the front leather roller. When the roving strip is output from the front jaw, under the action of twisting, the strip-shaped roving rotates along its own axis, wrapping the spandex yarn into the middle of the yarn to form a core-spun yarn with a circular cross-section, and then passes through the yarn guide hook and the wire ring, and is finally wound around the spindle.

[0003] In actual production, the linear speed of the front roller is about 3 times greater than the linear speed of the spandex yarn released by the godet roller, that is, the spandex yarn exists in the core-spun yarn under tension, and the fabric woven from this yarn has elasticity accordingly. The size of this speed difference determines the elasticity of the yarn, which will be adjusted according to the customer's requirements for fabric elasticity. Since the linear speed of the front roller is related to the twist of the yarn, the speed difference is generally changed on the spinning machine by adjusting the linear speed of the spandex yarn released by the godet roller. This core-spun yarn mechanism has certain defects in maintaining the elastic stability of the yarn. It can keep the mechanical draft ratio of the spandex yarn unchanged during the production process, but the outer layer of the spandex yarn in the spandex cake exerts pressure on the inner layer of the spandex yarn, so that the tension of the spandex yarn in the spandex cake decreases from the outside to the inside. This tension difference is not obvious in the short range, but as the spandex cake is unwound, there is a significant difference between the spandex yarn tension of the large cake and that of the small cake. In this case, even if the stretch ratio (mechanical draft ratio) of the spandex filament is constant, the elasticity of the produced spandex core-spun yarn varies, and the difference in yarn elasticity will seriously affect the quality and appearance of the fabric.

[0004] The prior art, such as the solution disclosed in CN203429314U, can only adjust the tension of the spandex core yarn in different spinning processes, but cannot adjust the tension of the spandex core yarn in the same spinning process. Summary of the invention

[0005] The purpose of the present invention is to provide a spinning mechanism for core-spun yarn, so as to solve the problem that the tension variation of the same type of spandex yarn affects the quality of the core-spun yarn in the existing textile core-spun yarn.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is: a spinning mechanism for core-spun yarn, including a roving tube, a rear roller, a middle roller, a front roller, a yarn guide hook, a spindle, a guide roller, a yarn cake and a guide wheel. The roving of the roving tube passes through the rear roller, the middle roller and the front roller in sequence. The yarn cake is placed on two guide rollers, and the spandex yarn released from the yarn cake is introduced into the front roller through the guide wheel and cooperates with the roving to complete core-spun. After core-spun, the core-spun yarn passes through the guide hook and is wound on the spindle; a tension adjustment device is provided between the guide wheel and the yarn cake to tension the spandex yarn between the two.

[0007] Preferably, the tension adjusting device comprises a tension adjusting shaft and a tension adjusting arm which cooperate with each other, the tension adjusting arm rotates around the tension adjusting shaft, a tension adjusting wheel is arranged at one end of the tension adjusting arm, and the tension adjusting wheel has an interaction force with the spandex yarn.

[0008] Preferably, a tension adjustment rod is provided between the guide wire wheel and the tension adjustment wheel for pressing down the spandex yarn therebetween.

[0009] Preferably, a wire guide groove is provided in the middle of the wire guide wheel and the tension adjustment wheel.

[0010] Preferably, a wire guide limit block is provided on the mounting shaft of the wire guide wheel, and the wire guide wheel rotates around the mounting shaft. The wire guide limit block is tangentially matched with the wire guide wheel and blocks the wire guide groove at the tangential position.

[0011] Preferably, the interaction force between the spandex yarn and the tension-adjusting wheel causes the tension-adjusting arm to be in an inclined state.

[0012] Preferably, the tension adjustment arm is equipped with an adjustment structure for adjusting the torque.

[0013] Preferably, the adjustment structure adjusts the length of the lever arm or adjusts the end force.

[0014] Preferably, the adjustment structure comprises a tension adjustment screw at the lower end of the tension adjustment arm, and a counterweight is threadedly sleeved on the tension adjustment screw.

[0015] The technical effects of the present invention are:

[0016] 1. Compared with the prior art, the present invention can adjust the tension change of the spandex yarn caused by the unwinding process through the design of the tension adjustment device.

[0017] 2. Through the coordinated design of the tension adjustment wheel and the tension adjustment rod, the wrapping angle between the spandex yarn and the tension adjustment rod can be changed, thus ensuring a more stable adjustment effect.

[0018] 3. The design of the wire guide groove can limit the transmission path of the spandex yarn, thereby ensuring a good transmission effect.

[0019] 4. The torque of the tension adjustment arm can be adjusted to suit different spandex yarns, making it suitable for tension adjustment of spandex yarns of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a spinning mechanism for core-spun yarn in Example 1;

[0022] Figure 2 is a schematic diagram of a spinning mechanism for core-spun yarn in Example 2;

[0023] Figure 3 is a schematic diagram of a spinning mechanism for core-spun yarn in Example 3;

[0024] Figure 4 is a schematic diagram of a spinning mechanism for core-spun yarn in Example 5;

[0025] Figure 5 is a schematic diagram of a guide wheel;

[0026] Figure 6 Schematic diagram of the guide wheel after installing a guide wire limit block;

[0027] Figure 7 is a schematic diagram of the tension adjustment device in Example 3;

[0028] The text labels shown in the figure represent:

[0029] 1. Roving bobbin; 2. Roving; 3. Rear roller; 4. Middle roller; 5. Front roller; 6. Yarn guide hook; 7. Spindle; 8. Wire guide roller; 9. Wire cake; 10. Spandex yarn; 11. Tension adjustment wheel; 12. Tension adjustment shaft; 13. Tension adjustment arm; 14. Tension adjustment pressure rod; 15. Wire guide wheel; 16. Wire guide groove; 17. Wire guide limit block; 19. Tension adjustment screw; 20. Counterweight; 21. Buffer spring. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1

[0032] like Figure 1 As shown, the spinning mechanism of the core-spun yarn of the present invention comprises a roving tube 1, a rear roller 3, a middle roller 4, a front roller 5, a yarn guide hook 6, a spindle 7, a guide roller 8, a yarn cake 9 and a guide wheel 15. The roving 2 of the roving tube 1 passes through the rear roller 3, the middle roller 4 and the front roller 5 in sequence. The yarn cake 9 is placed on two guide rollers 8, and the spandex yarn 10 released from the yarn cake 9 is introduced into the front roller 5 through the guide wheel 15 and cooperates with the roving 2 to complete the core-spun. After the core-spun yarn is completed, it passes through the guide hook 6 and is wound on the spindle 7. The characteristic is that a tension adjusting device is arranged between the guide wheel 15 and the yarn cake 9 to tension the spandex yarn therebetween, and the tension adjusting device comprises a tension adjusting shaft 12 and a tension adjusting arm 13 which cooperate with each other, and the tension adjusting arm 13 rotates around the tension adjusting shaft 12, and a tension adjusting wheel 11 is arranged at one end of the tension adjusting arm 13, and the tension adjusting wheel 11 has an interaction force with the spandex yarn 10, and the interaction force between the spandex yarn 10 and the tension adjusting wheel 11 makes the tension adjusting arm 13 in an inclined state.

[0033] The specific production of core-spun yarn using the mechanism of this embodiment is as follows:

[0034] Step 1: roving preparation: pulling the roving 2 out of the roving tube 1 and passing through the rear roller 3, the middle roller 4 and the front roller 5 in sequence to complete the preparation;

[0035] Step 2: Prepare spandex yarns. Place the yarn cake 9 on two guide rollers 8, pull the spandex yarns out of the yarn cake 9, and make them pass through the tension adjustment wheel 11 and the guide roller 15 in sequence before being sent to the front roller 5. The spandex yarns 10 and the tension adjustment wheel 11 will generate an interaction force, and make the tension adjustment arm 13 in an inclined state.

[0036] Step three, core wrapping and winding. The roving passes through the rear jaw composed of the rear roller and the rear leather roller, the middle jaw composed of the middle roller and the rear leather roller, and the front jaw composed of the front roller and the front leather roller in turn. The spandex yarn passes through the guide wheel and is accurately positioned and fed into the middle of the roving strip composed of short fibers flattened by the front roller and the front leather roller. When the roving strip is output from the front jaw, under the action of twisting, the strip-shaped roving rotates along its own axis, wrapping the spandex yarn into the middle of the yarn to form a core-wrapped yarn with a circular cross-section. It then passes through the yarn guide hook and wire ring, and is finally wound around the spindle.

[0037] During the continuous production of the core-spun yarn, the yarn cake 9 will become smaller and smaller, which will cause the tension of the spandex yarn between the guide wheel 15 and the yarn cake 5 to become smaller, so that the force acting on the tension adjustment wheel 11 will become smaller, and the tension adjustment arm 13 will reduce the inclination angle, so that the tension adjustment wheel 11 will push up the spandex yarn 10, and then adjust the tension of the spandex yarn 10, so that the spandex yarn 10 is in a taut state, thereby reducing the influence of the tension change on the quality of the core-spun yarn.

[0038] Example 2

[0039] like Figure 2 As shown, the spinning mechanism of the core-spun yarn of Example 1 still has certain defects in adjusting the tension. Compared with Example 1, a tension adjustment rod 14 is provided between the guide wheel 15 and the tension adjustment wheel 11 to press down the spandex yarn 10 therebetween.

[0040] The spinning steps of the core-spun yarn of this embodiment are consistent with those of the embodiment 1, except that, during the continuous production of the core-spun yarn, the yarn cake 9 will become smaller and smaller, which will cause the tension of the spandex yarn between the yarn guide wheel 15 and the yarn cake 5 to become smaller, so that the force acting on the tension adjustment wheel 11 becomes smaller, and the tension adjustment arm 13 will reduce the inclination angle, so that the tension adjustment wheel 11 will push up the spandex yarn 10, and the wrapping angle between the spandex yarn 10 and the tension adjustment rod 14 will change. The calculation formula of the tension and the wrapping angle is: T=T 。 ∫e μθ ddθ (T: yarn tension, To: yarn initial tension, θ: yarn wrap angle, μ: friction coefficient), the tension of the spandex yarn 10 is adjusted by adjusting the wrap angle.

[0041] Example 3

[0042] like Figure 3 and Figure 7 As shown, compared with Example 2, the tension adjustment arm 13 of this embodiment is equipped with an adjustment structure for adjusting the torque, and the adjustment structure includes a tension adjustment screw 19 at the lower end of the tension adjustment arm 13, and the tension adjustment screw 19 is threadedly sleeved with a counterweight block 20.

[0043] When weaving core-spun yarn, the specifications of the spandex yarn used may be different, and therefore the required tension adjustment will also be different. In this embodiment, the torque of the tension adjustment arm 13 can be adjusted, that is, the interaction force between the spandex yarn and the tension adjustment wheel 11 required for the tension adjustment wheel 11 to rotate a fixed angle is different. Specifically, a tension adjustment screw 19 is provided at the lower end of the tension adjustment arm 13, and the torque is adjusted by sleeve-connecting counterweight blocks 20 of different weights, so that the core-spun yarn weaving mechanism of the present application can adapt to spandex yarns of various specifications.

[0044] Example 4

[0045] like Figure 5 As shown, compared with Embodiment 2, a wire guide groove 16 is provided in the middle of the wire guide wheel 15 and the tension adjustment wheel 11 of this embodiment.

[0046] A guide wire groove 16 is provided in the middle of the guide wire wheel 15 and the tension adjusting wheel 11 , so as to ensure that the spandex yarn 10 is in the guide wire groove 16 of the tension adjusting wheel 11 and the guide wire wheel 15 .

[0047] Further, such as Figure 5 As shown, a wire guide limit block 17 is provided on the mounting shaft of the wire guide wheel 15. The wire guide wheel 15 rotates around the mounting shaft. The wire guide limit block 17 is tangentially matched with the wire guide wheel 15 and blocks the wire guide groove 16 at the tangential position.

[0048] In order to ensure that the spandex yarn does not escape from the wire guide groove 16 , the wire guide limit block 17 is designed so as not to interfere with the rotation of the wire guide wheel 15 and to block the wire guide groove 16 to prevent the spandex yarn from escaping from the wire guide groove 16 .

[0049] Example 5

[0050] like Figure 4 As shown, compared with Example 1, the tension adjustment arm 13 of this embodiment is equipped with a buffer structure, and the buffer structure is a buffer spring 13. When the tension of the spandex yarn changes, the tension adjustment arm 13 will swing, and the buffer structure can prevent the buffering amplitude of the tension adjustment arm 13 from being too fast, thereby achieving smooth adjustment.

[0051] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0052] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, ordinary technicians in this technical field can make several improvements, modifications or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. A spinning mechanism for core-spun yarn, comprising a roving drum, a rear roller, a middle roller, a front roller, a yarn guide hook, a spindle, a guide roller, a yarn cake and a guide wheel, wherein the roving of the roving drum passes through the rear roller, the middle roller and the front roller in sequence, the yarn cake is placed on two guide rollers, and the spandex yarn released from the yarn cake is introduced into the front roller through the guide wheel and cooperates with the roving to complete core-spun yarn, and the core-spun yarn after core-spun yarn passes through the guide hook and is wound on the spindle; characterized in that: A tension regulating device is arranged between the guide wire wheel and the yarn cake to tension the spandex yarn therebetween.

2. The spinning mechanism of the core-spun yarn according to claim 1, characterized in that: The tension adjusting device comprises a tension adjusting shaft and a tension adjusting arm which cooperate with each other. The tension adjusting arm rotates around the tension adjusting shaft. A tension adjusting wheel is arranged at one end of the tension adjusting arm, and the tension adjusting wheel has interaction force with the spandex yarn.

3. The spinning mechanism of the core-spun yarn according to claim 2, characterized in that: A tension adjusting rod for pressing down the spandex yarn between the guide wire wheel and the tension adjusting wheel is arranged between the guide wire wheel and the tension adjusting wheel.

4. The spinning mechanism of the core-spun yarn according to claim 2 or 3, characterized in that: A wire guiding groove is provided in the middle of the wire guiding wheel and the tension adjusting wheel.

5. The spinning mechanism of the core-spun yarn according to claim 4, characterized in that: A wire guide limit block is arranged on the installation shaft of the wire guide wheel. The wire guide wheel rotates around the installation shaft. The wire guide limit block is tangentially matched with the wire guide wheel and blocks the wire guide groove at the tangential position.

6. The spinning mechanism of the core-spun yarn according to claim 2 or 3, characterized in that: The interaction force between the spandex yarn and the tension-adjusting wheel causes the tension-adjusting arm to be in an inclined state.

7. The spinning mechanism of the core-spun yarn according to claim 6, characterized in that: The tension adjustment arm is equipped with an adjustment structure for adjusting the torque.

8. The spinning mechanism of the core-spun yarn according to claim 7, characterized in that: The adjustment structure adjusts the length of the lever arm or adjusts the end force.

9. The spinning mechanism of the core-spun yarn according to claim 8, characterized in that: The adjustment structure comprises a tension adjustment screw at the lower end of the tension adjustment arm, and a counterweight block is threadedly sleeved on the tension adjustment screw.

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