Tow traction system capable of freely adjusting tension of tows by using double-roller electric rollers

Abstract

The invention discloses a tow traction system capable of freely adjusting the tension of a tow by using a double-roller electric roller, which comprises a bracket, and a first driving roller and a second driving roller which are transversely and rotatably arranged on the bracket and are parallel to each other, a silk ribbon penetrating gap is formed between the first transmission roller and the second transmission roller, and the rotating speed of the first transmission roller is opposite to that of the second transmission roller. The silk ribbon is in a loose and non-tensioned state through the first transmission roller and the second transmission roller which are opposite in rotating speed, the rotating speed of the silk ribbon is linked with the rotating speed of the double rollers of the silk swaying machine pulled by the rear-end silk flock, on one hand, the width of the silk ribbon can be freely adjusted, and on the other hand, the silk ribbon is in the non-tensioned and loose state before entering the tail-end silk swaying machine. The change influence of the tension of the silk ribbon caused by the reciprocating motion of the swing arm of the tail-end silk swaying machine is greatly reduced, so that the width fluctuation of the silk ribbon is reduced, and the width of the tow can be conveniently adjusted in the traction process of the crimped rear-end tow.

Description

Technical Field

[0001] The invention relates to the technical field of a production and processing system for a diacetate fiber bundle, and in particular to a bundle traction system which utilizes a double pair of electric rollers to freely adjust the bundle tension. Background Art

[0002] The stability of the ribbon width of cellulose diacetate tow for cigarettes is crucial for the stable control of subsequent filter rod suction resistance, yield, hardness and other indicators. During the transmission process, the curled tow is affected by the change of the rear end swing wire traction tension and the action of the guide rods on the transmission path, and the width of the fiber tow is constantly changing.

[0003] After searching, the Chinese patent with the authorization announcement number CN213239924U discloses an online monitoring device for the doubling of diacetate fiber bundles for cigarettes. The device aims to solve the problem of width and thickness distribution of the bundles before curling caused by differences in doubling methods. Based on the AI ​​online recognition method, the statistical data of the width and thickness uniformity of the bundles before curling under different conditions are obtained. By comparing the online analysis with the actual bundle width control effect, the effectiveness and feasibility of the online monitoring device for doubling are verified, and the width uniformity of the diacetate fiber bundles before curling is improved.

[0004] The existing public patents do not control the width of the diacetate fiber material tow, and do not yet involve the technical solution for adjusting the width of the diacetate fiber tow in the rear end tow drawing section for cigarettes. Summary of the invention

[0005] In order to solve the technical problems existing in the background technology, the present invention proposes a tow pulling system which utilizes double pairs of electric rollers to freely adjust the tension of the tow.

[0006] The present invention proposes a yarn pulling system that utilizes double pairs of electric rollers to freely adjust the yarn tension, comprising a bracket and a first transmission roller and a second transmission roller that are laterally rotatably mounted on the bracket, wherein the first transmission roller and the second transmission roller are parallel, a ribbon penetration gap is formed between the first transmission roller and the second transmission roller, and the rotational speeds of the first transmission roller and the second transmission roller are opposite.

[0007] As a further optimized solution of the present invention, the linear speeds of the first transmission roller and the second transmission roller relative to the ribbon are equal.

[0008] As a further optimized solution of the present invention, the first transmission roller and the second transmission roller have the same outer diameter and the same rotational speed.

[0009] As a further optimized solution of the present invention, the first transmission roller and the second transmission roller are distributed in the same horizontal direction.

[0010] As a further optimized solution of the present invention, the width of the gap through which the ribbon passes between the first transmission roller and the second transmission roller is adjustable.

[0011] In some embodiments, preferably, the first transmission roller is mounted on a first mounting frame, the second transmission roller is mounted on a second mounting frame, the first mounting frame and the second mounting frame are both mounted on the frame, and the distance between the first mounting frame and the second mounting frame is adjustable.

[0012] Specifically in some embodiments, the first mounting frame is fixed on a frame, a screw slider mechanism is installed on the frame, the second mounting frame is installed on a slider on the screw slider mechanism, and the distance between the first mounting frame and the second mounting frame is adjusted by the screw slider mechanism.

[0013] A tow pulling system that utilizes double pairs of electric rollers to freely adjust the tension of a tow, comprises a drying panel and an oscillating wire machine, wherein the silk ribbon dried by the drying panel is evenly laid in a tow barrel by the swing arm of the oscillating wire machine, the first transmission roller and the second transmission roller are arranged between the oscillating wire machine and the drying panel, the silk ribbon dried by the drying panel enters the oscillating wire machine after passing through the first transmission roller and the second transmission roller, the lifting and transmission power is provided by the first transmission roller and the second transmission roller, and then enters the oscillating wire barrel for laying after being pulled by the rollers of the oscillating wire machine.

[0014] As a further optimized solution of the present invention, the heights of the first transmission roller and the second transmission roller are higher than the height of the drying panel.

[0015] As a further optimized solution of the present invention, the rotational speed ratio of the first transmission roller and the second transmission roller to the rotational speed of the roller of the oscillating wire machine is fixed.

[0016] In the present invention, the proposed tow traction system that uses double pairs of electric rollers to freely adjust the tension of the tow is provided. At the key position of the tow transmission over long distances (i.e., between the drying panel and the swing wire machine), a first transmission roller and a second transmission roller with opposite rotation directions are added. Furthermore, the ratio of the rotation speed of the first transmission roller and the second transmission roller to the rotation speed of the swing wire machine is constant, which effectively solves the problem of tow width fluctuation caused by the initial design defects of the factory.

[0017] On the one hand, the ribbon width can be freely adjusted by the first transmission roller and the second transmission roller with opposite rotation speeds. On the other hand, the ribbon is placed in an untensioned and relaxed state before entering the terminal swing wire machine, thereby greatly reducing the influence of the change of the ribbon tension caused by the reciprocating motion of the swing arm of the terminal swing wire machine, thereby reducing the fluctuation of the ribbon width and facilitating the adjustment of the width of the tow during the traction process of the curled rear end tow.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a device for adjusting the width of a ribbon using double pairs of rollers according to the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of a tow traction system for freely adjusting the tension of the tow by using double pairs of electric rollers of the present invention;

[0021] In the figure: 1. first transmission roller; 2. second transmission roller; 3. first drive motor; 4. second drive motor; 5. frame; 6. first mounting frame; 7. second mounting frame; 8. drying panel; 9. swing wire machine. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] like Figure 1-Figure 2 A tow pulling system for freely adjusting the tension of a tow by using a double pair of electric rollers shown in the figure comprises a bracket and a first transmission roller 1 and a second transmission roller 2 which are laterally rotatably mounted on the bracket, the first transmission roller 1 and the second transmission roller 2 are parallel, a gap for passing a ribbon is formed between the first transmission roller 1 and the second transmission roller 2, the rotation speeds of the first transmission roller 1 and the second transmission roller 2 are opposite, and the first transmission roller 1 and the second transmission roller 2 are distributed in the same horizontal direction;

[0024] The first transmission roller 1 and the second transmission roller 2 are made of 40Cr material, with a surface chrome plating thickness of 0.02mm-0.04mm, a surface hardness of 42-45HRC, and a roller surface roughness RC of 0.4-0.8; the surface runout of the first transmission roller 1 and the second transmission roller 2 after being assembled with the axonometric measurement is less than 0.08mm; the length of the first transmission roller 1 and the second transmission roller 2 is approximately 100mm, and the outer diameters of the first transmission roller 1 and the second transmission roller 2 are between 100mm-150mm, and the linear speeds of the first transmission roller 1 and the second transmission roller 2 relative to the ribbon are equal. Specifically, in this embodiment, the outer diameters of the first transmission roller 1 and the second transmission roller 2 are equal and the rotation speeds are equal, the first transmission roller 1 is connected to the first drive motor 3, and the second transmission roller 2 is connected to the second drive motor 4, and the rotation speeds of the first drive motor 3 and the second drive motor 4 are equal and opposite;

[0025] The first drive motor 3 and the second drive motor 4 are explosion-proof motors and meet certain explosion-proof level requirements on site. They occupy little space on site, which is conducive to large-scale promotion: explosion-proof servo motors are lighter and smaller than general explosion-proof asynchronous motors. They can meet the simultaneous operation of multiple production lines in a limited space and are easy to repair and maintain. Since multiple production lines are arranged in a limited space at the tow production site, this device is conducive to the large-scale promotion of multiple production lines at the tow production site.

[0026] Preferably, in order to adjust the clamping force of the first transmission roller 1 and the second transmission roller 2 on the ribbon, the width of the ribbon penetration gap between the first transmission roller 1 and the second transmission roller 2 is adjustable.

[0027] Specifically, the first transmission roller 1 is mounted on the first mounting frame 6, the second transmission roller 2 is mounted on the second mounting frame 7, the first mounting frame 6 and the second mounting frame 7 are both mounted on the frame 5, and the distance between the first mounting frame 6 and the second mounting frame 7 is adjustable. Specifically, the first mounting frame 6 and / or the second mounting frame 7 are slidably mounted on the frame 5, and also include a locking member to fix the first mounting frame 6 and / or the second mounting frame 7 on the frame 5, and the locking member is a fixing pin or a fixing screw in the prior art.

[0028] It also includes a drying panel 8 and an oscillating wire machine 9. The silk ribbon dried by the drying panel 8 is evenly laid in the oscillating wire barrel by the oscillating wire machine 9. The first transmission roller 1 and the second transmission roller 2 are arranged between the oscillating wire machine 9 and the drying panel 8. The silk ribbon dried by the drying panel 8 passes through the first transmission roller 1 and the second transmission roller 2 and then enters the oscillating wire machine 9.

[0029] Specifically, the heights of the first transmission roller 1 and the second transmission roller 2 are higher than the height of the drying panel 8, which further facilitates cooling of the filament bundle.

[0030] As a further optimized solution of the present invention, the rotation speed ratio of the first transmission roller 1 and the second transmission roller 2 to the rotation speed of the rollers of the oscillating wire machine 9 is fixed.

[0031] In the present invention, a tow traction system that utilizes double pairs of electric rollers to freely adjust the tension of the tow is proposed. The first transmission roller 1 and the second transmission roller 2 with opposite rotation speeds are used to make the ribbon in a relaxed and untensioned state, so as to facilitate the adjustment of the width of the tow during the traction of the curled rear end tow. At the key position of the tow transmission over long distances (i.e., between the drying panel 8 and the swing wire machine 9), the first transmission roller 1 and the second transmission roller 2 with opposite rotation speeds are added. Furthermore, the rotation speed of the first transmission roller 1 and the second transmission roller 2 is in a certain ratio to the rotation speed of the pair of rollers of the swing wire machine 9, which effectively solves the problem of large fluctuations in the ribbon width caused by changes in the tow tension due to changes in the end traction force during the long-distance transmission of the tow. Compared with a blank machine that did not have the device online at the same time, the bandwidth fluctuation CV value of the tow of the same specification has decreased by 20%.

[0032] Specifically, the first drive motor 3 driven by the first drive roller 1 and the second drive motor 4 driven by the second drive roller 2 are powered by separate power supplies, equipped with separate power supply openings, air circuit breakers, relays, etc., as well as separate emergency stop switches, three-position selector switches, start-stop buttons with lights, etc. for each set;

[0033] It also includes a PLC control system, which includes a PLC, a switch, and a communication module. The PLC is connected to the first drive motor 3, the second drive motor 4, and the swing wire machine 9. The PLC control system controls the swing wire machine 9 and the first transmission roller 1 and the second transmission roller 2 to rotate in a linked manner to ensure that their rotation speeds run at a certain ratio. Specifically, the PLC is a Siemens S7-1500 series, and the drivers of the first drive motor 3 and the second drive motor 4 are connected to a servo motor encoder. Through the precise control of the servo motor encoder and the servo driver, the accurate matching of the roller speed is greatly improved.

[0034] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tow pulling system that uses double pairs of electric rollers to freely adjust the tension of the tow, characterized in that: The invention comprises a support, and a first transmission roller (1) and a second transmission roller (2) which are laterally rotatably mounted on the support, a ribbon passing gap is formed between the first transmission roller (1) and the second transmission roller (2), and the rotation speeds of the first transmission roller (1) and the second transmission roller (2) are opposite.

2. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 1, characterized in that: The linear speeds of the first transmission roller (1) and the second transmission roller (2) relative to the ribbon are equal.

3. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 2, characterized in that: The first transmission roller (1) and the second transmission roller (2) have the same outer diameter and the same rotational speed.

4. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 1, characterized in that: The first transmission roller (1) and the second transmission roller (2) are distributed in the same horizontal direction.

5. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to any one of claims 1 to 4, characterized in that: The width of the gap through which the ribbon passes between the first transmission roller (1) and the second transmission roller (2) is adjustable.

6. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 5, characterized in that: The first transmission roller (1) is mounted on a first mounting frame (6), and the second transmission roller (2) is mounted on a second mounting frame (7). The first mounting frame (6) and the second mounting frame (7) are both mounted on the frame (5), and the distance between the first mounting frame (6) and the second mounting frame (7) is adjustable.

7. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 1, characterized in that: It also includes a drying panel (8) and an oscillating wire machine (9). The silk ribbon dried by the drying panel (8) is evenly spread in an oscillating wire barrel through the oscillating wire machine (9). The silk ribbon dried by the drying panel (8) passes through the first transmission roller (1) and the second transmission roller (2) and then enters the oscillating wire machine (9).

8. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 7, characterized in that: The heights of the first transmission roller (1) and the second transmission roller (2) are higher than the height of the drying panel (8).

9. The tow pulling system for freely adjusting the tow tension by using double pairs of electric rollers according to claim 7, characterized in that: The ratio of the rotational speed of the first transmission roller (1) and the second transmission roller (2) to the rotational speed of the rollers of the oscillating wire machine (9) is a constant value.

Images