Non-woven fabric buffer tension control system

Abstract

The invention relates to the related technical field of non-woven fabric conveying, and discloses a non-woven fabric cache tension control system which comprises a cache mechanism and a traction mechanism, the cache mechanism comprises a plurality of cache rollers, a lifting cache roller set mechanism and a position sensor, the lifting cache roller set mechanism comprises a lifting roller, a lifting driving assembly and a counterweight assembly, and the traction mechanism is used for pulling non-woven fabric; and the length adjusting and correcting mechanism comprises a guide roller, a sliding rail and a guide roller position detection assembly, and the guide roller is arranged between the buffering mechanism and the traction mechanism. The lifting driving assembly is arranged, and the sliding guide assembly is arranged in a matched mode, so that the lifting roller can stably move, and the problem that the lifting roller is stuck is solved; by arranging the length adjusting and correcting mechanism, the length adjusting and correcting effect is achieved, the material tightness state is adjusted, the material long-distance conveying size accumulated error is made up, dynamic balance is formed between the whole process and the buffering mechanism, and it is guaranteed that the tension of the whole machine is stable.

Description

Technical Field

[0001] This invention relates to the field of nonwoven fabric conveying technology, specifically a nonwoven fabric buffer tension control system. Background Technology

[0002] Existing buffer structures typically consist of a single buffer roller with sliders connected to both ends. The buffer roller is pulled by a traction pressure roller to transport the nonwoven fabric.

[0003] During conveying, the traction roller rotates, pulling the buffer roller upward. When the unwinding reaches the set length, the single buffer roller falls. The falling speed varies depending on the nonwoven fabric roll diameter and tension, which may cause the following malfunctions: 1. The buffer roller and the two side slider assemblies are not parallel during lifting, causing the tilting mechanism to jam; 2. When the buffer roller falls to the bottom, the nonwoven fabric hangs down and touches the ground, which can easily cause contamination and lead to accumulated deviations.

[0004] In long-distance conveying, the cumulative error in the size of nonwoven fabric becomes more pronounced during long-distance conveying from the buffer station to the traction pressure roller. When the error is large, it can lead to material tension fluctuations and dimensional instability, affecting material flatness and product quality.

[0005] This application is submitted in response to the above-mentioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide a nonwoven fabric buffer tension control system. By setting up a lifting buffer roller group mechanism to adjust the buffer balance, the system avoids problems such as jamming and nonwoven fabric sagging and contacting the ground. A length adjustment and correction mechanism is set up to correct errors and ensure the overall tension stability of the machine.

[0007] The present invention is achieved through the following technical solution.

[0008] The present invention provides a nonwoven fabric buffer tension control system, comprising:

[0009] The buffer mechanism includes several buffer rollers, a lifting buffer roller assembly, and a position sensor. The lifting buffer roller assembly includes a lifting roller, a lifting drive assembly, and a counterweight assembly. The nonwoven fabric is buffered by passing around the buffer rollers and the lifting rollers. The lifting roller is connected to the lifting drive assembly and the counterweight assembly. The counterweight assembly provides a pulling force in the upward direction to the lifting roller. The pulling force provided by the counterweight assembly to the lifting roller is less than the force required for the lifting roller to rise. The lifting drive assembly is used to drive the lifting roller to rise. The position sensor is used to detect the position of the lifting roller.

[0010] When the position sensor detects that the lifting roller has reached the bottom, it sends a command to the unwinding mechanism to stop unwinding, so as to prevent the non-woven fabric from drooping and contacting the ground and to avoid the accumulation of errors caused by this.

[0011] By setting up a lifting drive component, the lifting roller can be actively adjusted to avoid jamming.

[0012] Traction mechanism: used for traction of nonwoven fabric;

[0013] The length adjustment and correction mechanism includes a guide roller, a slide rail, and a guide roller position detection component. The guide roller is positioned between the buffer mechanism and the traction mechanism and is mounted on the slide rail, allowing it to move up and down along the slide rail. The guide roller position detection component is used to detect the position of the guide roller and is electrically connected to the lifting drive component. When the traction mechanism starts traction, the guide roller position detection component detects the movement of the guide roller and sends a command to the lifting drive component. The lifting drive component causes the lifting roller to rise a set distance to compensate for the length of the nonwoven fabric that has been pulled out, thereby correcting errors and maintaining stable tension.

[0014] After the nonwoven fabric reaches the set length, the lifting roller slowly descends and, in conjunction with the position detection of the sensor, provides a signal to stop the unwinding mechanism from feeding the fabric. At this time, the nonwoven fabric and the buffer assembly form a balanced state, keeping the nonwoven fabric from being stretched, controlling the tension to be stable, and preventing it from sagging and contacting the ground.

[0015] Preferably, the traction mechanism uses a traction pressure roller.

[0016] Alternatively, the position sensor and guide roller position detection assembly can be a contact sensor (such as a limit switch) or a proximity sensor (such as an ultrasonic sensor, photoelectric sensor or laser rangefinder).

[0017] Furthermore, the nonwoven fabric buffer tension control system also includes a smoothing mechanism, which is positioned in front of the buffer mechanism. The smoothing mechanism includes an adjusting roller and an adjusting component. The adjusting component is used to adjust the position of one or both ends of the adjusting roller so that the adjusting roller can form an inclination to prevent wrinkling and to smooth the nonwoven fabric.

[0018] Furthermore, the adjustment assembly includes an adjustment screw, the end of the adjustment roller is mounted on the adjustment screw, the adjustment screw is mounted on a bracket and threadedly engaged with the bracket, and rotating the adjustment screw adjusts the inclination of the adjustment roller.

[0019] Preferably, an adjustment handle is installed at the end of the adjusting screw for easy operation.

[0020] Furthermore, the buffer mechanism also includes an anti-collision limiting damper, which is used to limit the lowest position of the lifting roller.

[0021] Optionally, anti-collision limit dampers are installed at one or both ends of the lifting roller.

[0022] Furthermore, at least two sets of lifting rollers are provided to achieve a longer buffer length.

[0023] Furthermore, all lifting rollers are mounted on the frame, and the lifting drive assembly is used to drive the frame to move.

[0024] By setting up a frame, there is no need to set up a separate lifting drive component for each lifting roller. The lifting drive of all lifting rollers can be achieved by driving the frame, thereby reducing equipment costs.

[0025] Furthermore, the lifting drive assembly is provided at both ends of the lifting roller, and both ends of the lifting roller are connected to the sliding guide assembly.

[0026] The lifting roller is driven synchronously from both ends during operation, and is equipped with a sliding guide assembly to achieve stable movement and further avoid jamming.

[0027] Furthermore, the length adjustment and correction mechanism also includes a transition roller positioned in front of the guide roller. The transition roller is movably installed and its height can be adjusted to ensure that the material remains flat before entering the pressure roller.

[0028] Optionally, a telescopic component or a linear module can be provided to adjust the height of the transition roller.

[0029] Preferably, the two ends of the transition roller are installed in the oblong holes, and the height can be adjusted by moving the transition roller in the oblong holes.

[0030] Furthermore, the buffer mechanism also includes a belt, which connects the lifting roller and the counterweight assembly via several reversing pulleys, and the counterweight assembly is mounted on the sliding guide assembly.

[0031] Optionally, the sliding guide assembly may be a slide rail slider assembly, a smooth rod slider assembly, etc.

[0032] Furthermore, the counterweight assembly includes a counterweight mounting rod and a counterweight, wherein the counterweight is detachably mounted on the counterweight mounting rod, facilitating rapid adjustment of the counterweight weight.

[0033] The beneficial effects of this invention are as follows: By setting a lifting drive component and a sliding guide component, the lifting roller can move smoothly, avoiding the problem of the lifting roller getting stuck; by setting a length adjustment and correction mechanism, when traction is started, the nonwoven fabric pulls the guide roller away from the lower limit position, and the buffer mechanism receives the signal from the length adjustment and correction mechanism, causing the lifting roller to rise and release a certain length of nonwoven fabric to compensate for the length of the pulled guide roller. At the same time, the unwinding mechanism unwinds the material, thereby achieving the length adjustment and correction effect, adjusting the tightness of the material, compensating for the cumulative error in the size of the material during long-distance conveying, and the whole process forms a dynamic balance with the buffer mechanism to ensure the stability of the tension of the whole machine; after the nonwoven fabric reaches the set length, since the lifting roller rises to a certain height in the early stage and then slowly falls, the position detection of the sensor provides a signal to stop the unwinding mechanism from unwinding the material. At this time, the nonwoven fabric and the buffer component form a balanced state, keeping the nonwoven fabric from being stretched, controlling the tension to be stable, and preventing it from sagging and contacting the ground.

[0034] By setting up a smoothing mechanism and adjusting the screw to adjust the balance of the nonwoven fabric before buffering, the nonwoven fabric is smoothed out and wrinkles are prevented. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0037] Figure 1 A schematic diagram of the structure of a nonwoven fabric buffer tension control system during operation;

[0038] Figure 2 A cross-sectional view of the nonwoven fabric buffer tension control system in operation;

[0039] Figure 3 A schematic diagram of the overall structure of a nonwoven fabric buffer tension control system;

[0040] Figure 4 This is a partial structural diagram of the cache mechanism;

[0041] Figure 5 This is a schematic diagram of the extension mechanism;

[0042] Figure 6 This is a schematic diagram of the length adjustment and correction mechanism;

[0043] Figure 7 A schematic diagram of the structure of the length adjustment and correction mechanism during operation;

[0044] In the diagram: Frame 1; Straightening mechanism 2; Adjusting roller 21; Adjusting handle 22; Bracket 23; Adjusting screw 24; Buffer mechanism 3; Buffer roller 31; Lifting and lowering buffer roller assembly mechanism 32; Frame 321; Lifting roller 322; Rodless cylinder 323; Belt 324; Counterweight assembly 325; Counterweight mounting rod 3251; Counterweight 3252; Smooth rod slider assembly one 326; Smooth rod slider assembly two 327; Anti-collision limit damper 33; Position sensor 34; Non-woven fabric 4; Traction mechanism 5; Length adjustment and correction mechanism 6; Guide roller 61; Transition roller 62; Groove photoelectric switch 63; Slide rail 64; Vertical plate 65. Detailed Implementation

[0045] The following is combined with Figures 1-7 The present invention will be described in detail below.

[0046] Example 1:

[0047] The present invention provides a nonwoven fabric buffer tension control system, comprising a frame 1, a stretching mechanism 2, a buffer mechanism 3, a traction mechanism 5, and a length adjustment and correction mechanism 6.

[0048] The rack 1 serves as the main body of the equipment, and the extension mechanism 2 and the buffer mechanism 3 are both installed on the rack 1.

[0049] During transport, the nonwoven fabric passes through the spreading mechanism 2, the buffer mechanism 3, the length adjustment and correction mechanism 6, and the traction mechanism 5 in sequence.

[0050] like Figure 2 , Figure 5 The smoothing mechanism 2 is positioned in front of the buffer mechanism 3. The smoothing mechanism 2 includes an adjusting roller 21 and an adjusting component. The adjusting component is used to adjust the position of one or both ends of the adjusting roller 21 so that the adjusting roller 21 can form an inclination to prevent wrinkling and is used to smooth the nonwoven fabric.

[0051] In this embodiment, the adjustment assembly can adjust the position of both ends of the adjustment roller 21. The adjustment assembly includes an adjustment screw 24. The end of the adjustment roller 21 is mounted on the adjustment screw 24. The adjustment screw 24 is mounted on the bracket 23 and is threadedly engaged with the bracket 23 or a nut mounted on the bracket. Rotating the adjustment screw 24 adjusts the inclination of the adjustment roller 21. An adjustment handle 22 is mounted on the end of the adjustment screw 24 for easy operation.

[0052] Before entering the buffer mechanism 3, the non-woven fabric is suspended in the air. Due to its own weight and tension, the non-woven fabric may fall or curl. To prevent wrinkling, a smoothing mechanism 2 is added. The balance of the non-woven fabric before buffering is adjusted by adjusting the screw 24. The non-woven fabric can be fed from below or above the adjusting roller 21. Rotating one side of the adjusting roller 21 and adjusting the screw 24 to form an inclination with the other side (similar to adjusting the belt of an assembly line) smooths the non-woven fabric.

[0053] If a product has slightly curled edges during the feeding process, the straightening mechanism 2 will assist in correcting it.

[0054] like Figures 1-4 The buffer mechanism 3 includes several buffer rollers 31, a lifting buffer roller group mechanism 32, and a position sensor 34.

[0055] In this embodiment, five sets of buffer rollers 31 are provided and rotatably mounted on the frame 1.

[0056] The position sensor 34 can be any sensor capable of detecting position in the prior art, such as a proximity switch or an optical position sensor. At least three sets of position sensors 34 are provided, corresponding from top to bottom to the upper limit position, origin, and lower limit position of the lifting roller 322, respectively.

[0057] The lifting buffer roller assembly 32 includes a lifting roller 322, a lifting drive assembly, and a counterweight assembly 325. The nonwoven fabric is buffered by passing around the buffer roller 31 and the lifting roller 322.

[0058] In this embodiment, two sets of lifting rollers 322 are provided to achieve a longer buffer length. The two ends of the lifting rollers 322 are rotatably mounted on the frame 321. The lifting drive assembly is used to drive the frame 321 to move. The position sensor 34 can be used to detect the position of the frame 321 or directly detect the position of the lifting rollers 322.

[0059] The lifting drive assembly can be selected from cylinders, hydraulic cylinders, linear motors, etc. In this embodiment, a rodless cylinder 323 is preferably used, and the lifting drive assembly is used to drive the lifting roller 322 to lift.

[0060] The frame 321 on both sides is connected to the slider of the rodless cylinder 323 on both sides. The rodless cylinder 323 is installed on the frame 1 and is driven synchronously from both ends when the lifting roller 322 moves. It is also equipped with a sliding guide assembly to achieve stable movement and further avoid jamming.

[0061] The frame 1 is equipped with a guide rod slider assembly 326, which includes a guide rod and a slider that can move along the guide rod. The frame 321 is connected to the slider in the guide rod slider assembly 326, which serves to guide the movement of the frame 321. The guide rod slider assembly 326 and the rodless cylinder 323 are respectively arranged at the left and right positions of the frame 321 to ensure that the frame 321 rises and falls smoothly.

[0062] By setting up a lifting drive component and a sliding guide component, the problem of jamming can be avoided.

[0063] The counterweight assembly 325 is connected to the frame 321 via a belt 324. The belt 324 is reversed by several reversing pulleys installed on the frame. The counterweight assembly 325 provides upward tension to the lifting roller 322. The weight of the counterweight assembly 325 is slightly less than the weight of the lifting roller 322 and its auxiliary components, so that the lifting roller 322 can descend slowly by its own weight, which is slightly greater than that of the counterweight.

[0064] The counterweight assembly 325 includes a counterweight mounting rod 3251 and a counterweight 3252. The counterweight 3252 is detachably mounted on the counterweight mounting rod 3251 (e.g., by snap-fit ​​or bolt connection) to facilitate quick adjustment of the counterweight weight.

[0065] The two ends of the counterweight mounting rod 3251 are respectively mounted on the slider of the smooth rod slider assembly 327.

[0066] A collision-prevention damper 33 is installed on the frame 1. The collision-prevention damper 33 is used to limit the lowest position of the lifting roller 322. The collision-prevention damper 33 is set at both ends of the lifting roller 322. When the frame 321 descends to the lowest position, it contacts the collision-prevention damper 33.

[0067] When the position sensor 34 detects that the lifting roller 322 has reached the bottom, it sends a command to the unwinding mechanism or control system, and the unwinding mechanism stops unwinding to prevent the nonwoven fabric from drooping and contacting the ground and to avoid the accumulation of errors caused by it.

[0068] The traction mechanism 5 is used to pull the nonwoven fabric. In this embodiment, the traction mechanism 5 adopts a traction pressure roller.

[0069] like Figure 6 , Figure 7 The length adjustment and correction mechanism 6 includes a guide roller 61, a transition roller 62 placed in front of the guide roller 61, a slide rail 64, a vertical plate 65, and a guide roller position detection assembly. The guide roller 61 is arranged between the buffer mechanism 3 and the traction mechanism 5.

[0070] The guide roller 61 is mounted on bearings at both ends, and the bearings are mounted on slide rail 64, so that the guide roller 61 can move up and down along slide rail 64. The guide roller position detection component is used to detect the position of the guide roller 61. The guide roller position detection component can be any sensor in the prior art that can detect position. In this embodiment, a slotted photoelectric switch 63 is preferred. The guide roller position detection component is electrically connected to the lifting drive component.

[0071] The transition roller 62 is movable and height-adjustable, which helps to keep the material flat before it enters the pressure roller. In this embodiment, the two ends of the transition roller 62 are bolted into the oblong holes on the vertical plate 65. The height is adjusted by moving the transition roller 62 within the oblong holes.

[0072] When the traction mechanism 5 starts traction, the guide roller position detection component detects the movement of the guide roller 61 and sends a command to the lifting drive component. The lifting drive component causes the lifting roller 322 to rise a set distance to compensate for the length of the nonwoven fabric that has been pulled out, thereby achieving the effect of correcting errors and maintaining stable tension.

[0073] When conveying nonwoven fabric 4, the traction mechanism 5 starts traction, and nonwoven fabric 4 pulls the guide roller 61 away from the lower limit slotted switch. The buffer mechanism (or the control system sends a signal to the buffer mechanism after receiving the signal) receives the signal from the length adjustment and correction mechanism 6. The unwinding mechanism receives the signal and unwinds the conveyed nonwoven fabric through the buffer mechanism 3 to maintain balance and prevent it from being stretched. At the same time, the rodless cylinder 323 provides an upward lifting force to the lifting roller 322. The air pressure of the rodless cylinder 323 is generally between 0.01-0.03MPa, providing the lifting roller 322 with the upward power. The lifting roller 322 rises and releases a certain length of nonwoven fabric to compensate for the length of the pulled guide roller 61. The guide roller 61 falls back to the lower limit, thereby achieving the length adjustment and correction effect, adjusting the tightness of the material, and compensating for the cumulative error in the size of the material during long-distance conveying. The whole process forms a dynamic balance with the buffer mechanism to ensure the stability of the tension of the whole machine. At this time, the lifting roller 322 maintains balance with the counterweight under the action of the rodless cylinder, and the nonwoven fabric is conveyed smoothly in this process.

[0074] After the nonwoven fabric reaches the set length, the pressure roller of the traction mechanism 5 stops rotating, the rodless cylinder does not provide air pressure, and the lifting roller 322 slowly falls. When the sensor detects that the lifting roller 322 has reached the set position, the frame 321 slows down and slowly hovers at the bottom. The position sensor 34 sends a signal to the unwinding mechanism or control system to stop the unwinding mechanism from feeding the material. At this time, the nonwoven fabric and the buffer assembly form a balanced state, keeping the nonwoven fabric from being stretched and controlling the tension to be stable.

[0075] The lifting roller 322 and the counterweight maintain dynamic balance during the rising and falling process, and the nonwoven fabric is transported smoothly during this process; after reaching the set length, the buffer component slowly descends by its own weight, which is slightly greater than that of the counterweight.

[0076] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand and implement the present invention. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A nonwoven fabric buffer tension control system, characterized in that: include: The buffer mechanism (3) includes several buffer rollers (31), a lifting buffer roller group mechanism (32), and a position sensor (34). The lifting buffer roller group mechanism (32) includes a lifting roller (322), a lifting drive assembly, and a counterweight assembly (325). The nonwoven fabric is buffered by passing around the buffer rollers (31) and the lifting rollers (322). The lifting roller (322) is connected to the lifting drive assembly and the counterweight assembly (325). The counterweight assembly (325) provides a pulling force in the upward direction for the lifting roller (322). The pulling force provided by the counterweight assembly (325) to the lifting roller (322) is less than the force required for the lifting roller (322) to rise. The lifting drive assembly is used to drive the lifting roller (322) to rise. The position sensor (34) is used to detect the position of the lifting roller (322). Traction mechanism (5): used for traction of nonwoven fabric; Length adjustment and correction mechanism (6): includes guide roller (61), slide rail (64) and guide roller position detection component. The guide roller (61) is set between the buffer mechanism (3) and the traction mechanism (5). The guide roller (61) is installed on the slide rail (64) and can move up and down along the slide rail (64). The guide roller position detection component is used to detect the position of the guide roller (61). The guide roller position detection component is electrically connected to the lifting drive component. When the traction mechanism (5) starts traction, the guide roller position detection component detects the movement of the guide roller (61) and sends a command to the lifting drive component. The lifting drive component causes the lifting roller (322) to rise a set distance to compensate for the length of the nonwoven fabric that is pulled out. After the traction mechanism (5) stops traction, the lifting roller (322) falls to the set position and is sensed by the position sensor (34).

2. The nonwoven fabric buffer tension control system according to claim 1, characterized in that: The nonwoven fabric buffer tension control system also includes a smoothing mechanism (2), which is placed in front of the buffer mechanism (3). The smoothing mechanism (2) includes an adjusting roller (21) and an adjusting component. The adjusting component is used to adjust the position of one or both ends of the adjusting roller (21) so that the adjusting roller (21) can form an inclination for smoothing the nonwoven fabric.

3. The nonwoven fabric buffer tension control system according to claim 2, characterized in that: The adjustment assembly includes an adjustment screw (24), the end of the adjustment roller (21) is mounted on the adjustment screw (24), the adjustment screw (24) is mounted on the bracket (23) and threadedly engaged with the bracket (23), and the slope of the adjustment roller (21) is adjusted by rotating the adjustment screw (24).

4. The nonwoven fabric buffer tension control system according to claim 1, characterized in that: The buffer mechanism (3) also includes an anti-collision limiting damper (33), which is used to limit the lowest position of the lifting roller (322).

5. The nonwoven fabric buffer tension control system according to any one of claims 1-4, characterized in that: At least two sets of the lifting rollers (322) are provided.

6. The nonwoven fabric buffer tension control system according to claim 5, characterized in that: All lifting rollers (322) are mounted on the frame (321), and the lifting drive assembly is used to drive the frame (321) to move.

7. The nonwoven fabric buffer tension control system according to claim 1 or 6, characterized in that: The lifting drive assembly is provided at both ends of the lifting roller (322), and both ends of the lifting roller (322) are connected to the sliding guide assembly.

8. The nonwoven fabric buffer tension control system according to claim 5, characterized in that: The length adjustment and correction mechanism (6) also includes a transition roller (62) placed in front of the guide roller (61). The transition roller (62) is movable and can be height adjusted.

9. The nonwoven fabric buffer tension control system according to claim 1, characterized in that: The buffer mechanism (3) further includes a belt (324) that connects the lifting roller (322) and the counterweight assembly (325), which is mounted on the sliding guide assembly.

10. The nonwoven fabric buffer tension control system according to claim 9, characterized in that: The counterweight assembly (325) includes a counterweight mounting rod (3251) and a counterweight (3252), wherein the counterweight (3252) is detachably mounted on the counterweight mounting rod (3251).

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