A rotary wire swinging device and its control method

Abstract

The present invention relates to the technical field of tubular drawn nonwoven fabric production, specifically a rotary swinging wire device and a control method thereof, comprising a driving device, a rotating body, a first moving plate, and a second moving plate, wherein the rotating body is connected to the output end of the driving device, the rotating body has a through cavity, the rotating body rotates around the axis of the cavity under the drive of the driving device, and the cavity is used to accommodate an airflow drawing tube; the first moving plate is fixed to one end of the rotating body, and the first moving plate is inclined toward the axis direction; the second moving plate and the first moving plate are fixed to the same end of the rotating body, and the second moving plate is inclined away from the axis direction. The auxiliary net uniformity of the present invention is improved, the phenomenon of the accumulation of the tow in the net curtain of the net forming machine is reduced, and the possibility of forming cloud spots is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of tubular drawing non-woven fabric production, and specifically to a rotary wire-swinging device and a control method thereof. Background Art

[0002] During the manufacturing process of non-woven fabrics, after the fiber bundle is ejected from the air draft tube, it will enter the wire-swinging device below the air draft tube so that the fiber filaments can be dispersed and fall on the lapping machine to form a fiber web, and then be further needled and roll-pressed into non-woven fabric.

[0003] Currently, on the spunbond tubular drawing non-woven fabric production line, the wire-swinging device mostly has the fiber bundle ejected from the air draft tube, passing through a fixed-angle fixed plate, and refracting to a moving plate reciprocating at a certain angle to lay the wire into a web.

[0004] However, in this traditional method, when the moving plate swings to the extreme positions on both sides, that is, when switching the swinging direction, it will stop and then swing back. It takes a certain amount of time to stop and restart. At this time, due to the fixed angle of the fixed plate, within the time when the moving plate stops due to switching the swinging direction, the fiber bundle will refract at the same position on the moving plate, and then refract through the stationary moving plate, and will accumulate on both sides of the web curtain of the lapping machine, and may form cloud patches due to the slow switching speed. Summary of the Invention

[0005] In view of the defects of the prior art, the present invention provides a rotary wire-swinging device and a control method thereof, which improve the web laying uniformity, reduce the phenomenon of fiber bundle accumulation on the web curtain of the lapping machine, and reduce the possibility of forming cloud patches.

[0006] To achieve the above object, the technical solution provided by the present invention is a rotary wire-swinging device, including a driving device, a rotating body, a first moving plate, and a second moving plate. The rotating body is connected to the output end of the driving device. The rotating body has a through cavity, and the rotating body rotates around the axis of the cavity under the drive of the driving device. The cavity is used to accommodate the air draft tube; the first moving plate is fixed to one end of the rotating body, and the first moving plate is inclined towards the direction close to the axis; the second moving plate is fixed to the same end of the rotating body as the first moving plate, and the second moving plate is inclined towards the direction away from the axis.

[0007] Further, the second moving plate is an arc-shaped plate, and the arc-shaped plate is bent towards the direction close to the first moving plate.

[0008] Further, the rotary wire-swinging device further includes a fixed bracket, the driving device is installed on the fixed bracket, and the rotating body is connected to the fixed bracket through a bearing.

[0009] Preferably, the driving device includes a driving motor, a driving gear and a driven gear; an output shaft of the driving motor is connected to the driving gear, the driving gear meshes with the driven gear, and the driven gear is connected to the rotating body.

[0010] Preferably, the rotating body is a tubular structure.

[0011] Further, the rotating body has a first end and a second end, the first end is connected to an output end of the driving device, a first fixing sleeve is sleeved outside the second end, a second fixing sleeve is sleeved outside the first fixing sleeve, and the first moving plate and the second moving plate are detachably fixed to the second fixing sleeve.

[0012] Further, the cavity penetrates from the first end to the second end, and the air draft tube extends into the cavity from the first end to a position close to the second end.

[0013] On the other hand, the present invention provides a control method for a rotating wire swinging device. The driving device drives the rotating body to perform a circular motion, the rotating body drives the first moving plate and the second moving plate to rotate synchronously, the air draft tube extends into the cavity of the rotating body, and the ejected wire bundle reaches the first moving plate, is refracted by the first moving plate to the second moving plate, and the wire bundle is refracted out by the second moving plate.

[0014] The working process of the present invention: the air draft tube extends into the cavity, the ejected wire bundle reaches the first moving plate, is refracted by the first moving plate to the second moving plate, and then is refracted from the second moving plate to an external swing plate. During this process, the driving device drives the rotating body to perform a circular motion, and the rotating body drives the first moving plate and the second moving plate to rotate synchronously.

[0015] The beneficial effects of the present invention: when the external swing plate stops due to swinging to the extreme positions on both sides left and right, the wire bundle can be refracted at different positions of the external swing plate through the first moving plate and the second moving plate, thereby avoiding the accumulation of the wire bundle on the wire mesh curtain of the web forming machine and reducing the possibility of forming cloud spots. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present invention in an embodiment;

[0017] Figure 2 is a schematic diagram of the refraction direction of the wire bundle in an embodiment of the present invention;

[0018] In the figure: 1. Driving device, 1.1. Driving motor, 1.2. Driving gear, 1.3. Driven gear, 2. Rotating body, 2.1. Cavity, 2.2. First end, 2.3. Second end, 2.4. First fixing sleeve, 2.5. Second fixing sleeve, 3. First moving plate, 4. Second moving plate, 5. Fixed bracket, 6. Bearing,

[0019] a. Air draft tube. Detailed implementation manners

[0020] To make the above objects, features and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0021] See Figure 1 , in one embodiment, a rotary wire swinging device includes a driving device 1, a rotating body 2, a first moving plate 3, and a second moving plate 4. The rotating body 2 is connected to the output end of the driving device 1. The rotating body 2 has a through cavity 2.1. The rotating body 2 rotates around the axis of the cavity 2.1 under the drive of the driving device 1. The cavity 2.1 is used to accommodate an air draft tube a; the first moving plate 3 is fixed to one end of the rotating body 2, and the first moving plate 3 is inclined towards the axis direction; the second moving plate 4 and the first moving plate 3 are fixed to the same end of the rotating body 2, and the second moving plate 4 is inclined away from the axis direction.

[0022] For the above rotary wire swinging device, the air draft tube a extends into the cavity 2.1, and the ejected filament bundle reaches the first moving plate 3, is refracted by the first moving plate 3 to the second moving plate 4, and then is refracted from the second moving plate 4 to an external swinging plate. During this process, the driving device 1 drives the rotating body 2 to perform a circular motion, and the rotating body 2 drives the first moving plate 3 and the second moving plate 4 to rotate synchronously. In this way, when the external swinging plate stops due to swinging to the extreme positions on both sides left and right, the filament bundle can be refracted by the first moving plate 3 and the second moving plate 4 at different positions on the external swinging plate, thereby avoiding the accumulation of the filament bundle on the wire mesh curtain of the web forming machine and reducing the possibility of forming cloud spots.

[0023] It should be noted that the first moving plate 3 and the second moving plate 4 are driven to rotate by the driving device 1, and the rotation speed of the rotating body 2 can be controlled by the driving device 1 and adjusted online. In addition, the rotating body 2 has a through cavity 2.1, and the cavity 2.1 can accommodate the air draft tube a so that the filament bundle ejected from the air draft tube a is arranged on the first moving plate 3. And during the working process, the air draft tube a is accommodated inside the cavity 2.1, which is beneficial to the miniaturization of the device and the structure is relatively reasonable.

[0024] In one embodiment, the second moving plate 4 is an arc-shaped plate, and the arc-shaped plate is bent towards the direction close to the first moving plate 3. For the above rotary wire swinging device, setting the second moving plate 4 as an arc-shaped plate can refract the filament bundle at different positions on the arc-shaped plate, and then gradually increase the damping to improve the dispersion of the filament bundle and make the web laying more uniform.

[0025] In one embodiment, the rotating wire swinging device further includes a fixed bracket 5, the driving device 1 is installed on the fixed bracket 5, and the rotating body 2 is connected to the fixed bracket 5 through a bearing 6.

[0026] In one embodiment, the driving device 1 includes a driving motor 1.1, a driving gear 1.2 and a driven gear 1.3; the output shaft of the driving motor 1.1 is connected to the driving gear 1.2, the driving gear 1.2 meshes with the driven gear 1.3, and the driven gear 1.3 is connected to the rotating body 2. As an example, the driving motor 1.1 can be a stepping motor, which can control the rotation speed, achieve adjustable angular velocity during rotation, and can be adjusted online.

[0027] For the above-mentioned rotating wire swinging device, the transmission is carried out by using meshing gears, and the rotation speed of the rotating body 2 can be adjusted by replacing the transmission gear combinations with different gear ratios.

[0028] In one embodiment, the rotating body 2 is a tubular structure.

[0029] In one embodiment, the rotating body 2 has a first end 2.2 and a second end 2.3. The first end 2.2 is connected to the output end of the driving device 1. A first fixing sleeve 2.4 is sleeved outside the second end 2.3, a second fixing sleeve 2.5 is sleeved outside the first fixing sleeve 2.4, and both the first moving plate 3 and the second moving plate 4 are detachably fixed to the second fixing sleeve 2.5.

[0030] For the above-mentioned rotating wire swinging device, by detachably fixing the first moving plate 3 and the second moving plate 4 on the second fixing sleeve 2.5, in this way, when it is necessary to change the refraction angle, the second fixing sleeve 2.5 can be directly detached from the first fixing sleeve 2.4, and the second fixing sleeve 2.5 with different angles and shapes of the first moving plate 3 and the second moving plate 4 can be replaced. Compared with the way of integrally arranging the first moving plate 3 and the second moving plate 4 on the rotating body 2, it is more flexible and the replacement cost is lower.

[0031] In one embodiment, the cavity 2.1 penetrates from the first end 2.2 to the second end 2.3, and the air flow drawing tube a extends into the cavity from the first end 2.2 to a position close to the second end 2.3.

[0032] On the other hand, another embodiment of the present invention provides a control method for a rotating wire swinging device. The driving device 1 drives the rotating body 2 to perform a circular motion. The rotating body 2 drives the first moving plate 3 and the second moving plate 4 to rotate synchronously. The air flow drawing tube a extends into the cavity 2.1 of the rotating body 2, and the ejected wire bundle reaches the first moving plate 3, is refracted by the first moving plate 3 to the second moving plate 4, and the wire bundle is refracted out by the second moving plate 4.

[0033] The control method of the above-mentioned rotary wire swinging device. In this way, when the external swinging plate stops due to swinging left and right to the extreme positions on both sides, the wire bundle can be refracted at different positions of the external swinging plate through the first moving plate 3 and the second moving plate 4, thus avoiding the accumulation of the wire bundle on the wire mesh curtain of the web forming machine and reducing the possibility of forming cloud patches. By adopting the control method in this embodiment, during the wire swinging process, the first moving plate 3 and the second moving plate 4 perform circular motion synchronously, greatly improving the wire laying speed, and the circular motion auxiliary wire improves the auxiliary web uniformity to a certain extent.

[0034] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, 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 or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature. It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only implementation manners.

Claims

1. A rotary wire-swinging device, characterized in that: it includes a driving device; a rotating body, connected to the output end of the driving device, the rotating body has a through cavity, the rotating body rotates around the axis of the cavity under the drive of the driving device, and the cavity is used to accommodate an air draft tube; a first moving plate, fixed to one end of the rotating body, and the first moving plate is inclined towards the axis; a second moving plate, fixed to the same end of the rotating body as the first moving plate, and the second moving plate is inclined away from the axis.

2. The rotary wire-swinging device according to claim 1, characterized in that: the second moving plate is an arc-shaped plate, and the arc-shaped plate is bent towards the first moving plate.

3. The rotary wire-swinging device according to claim 1 or 2, characterized in that: the rotary wire-swinging device further includes a fixed bracket, the driving device is installed on the fixed bracket, and the rotating body is connected to the fixed bracket through a bearing.

4. The rotary wire-swinging device according to claim 1 or 2, characterized in that: the driving device includes a driving motor, a driving gear and a driven gear; the output shaft of the driving motor is connected to the driving gear, the driving gear meshes with the driven gear, and the driven gear is connected to the rotating body.

5. The rotary wire-swinging device according to claim 1 or 2, characterized in that: the rotating body is a tubular structure.

6. The rotary wire-swinging device according to claim 1 or 2, characterized in that: the rotating body has a first end and a second end, the first end is connected to the output end of the driving device, the outside of the second end is sleeved with a first fixing sleeve, the outside of the first fixing sleeve is sleeved with a second fixing sleeve, and the first moving plate and the second moving plate are both detachably fixed to the second fixing sleeve.

7. The rotary wire-swinging device according to claim 6, characterized in that: the cavity penetrates from the first end to the second end, and the air draft tube extends into the cavity from the first end to a position near the second end.

8. A control method using the rotary wire-swinging device according to claim 1 or 2, characterized in that: the driving device drives the rotating body to make a circular motion, the rotating body drives the first moving plate and the second moving plate to rotate synchronously, the air draft tube extends into the cavity of the rotating body, the ejected filament bundle reaches the first moving plate, is refracted by the first moving plate to the second moving plate, and the filament bundle is refracted out by the second moving plate.

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