Tension control apparatus and method for wet wipe substrate delivery

Abstract

The application discloses a tension control device and method for wet tissue substrate conveying, a liquid medicine box is arranged on a base and below a conveying path of the wet tissue substrate, a stand is arranged on the base and located at one side of the liquid medicine box, a cover plate is arranged on the top of the stand, a lifting driving mechanism is arranged on the cover plate, a lifting plate is arranged at the bottom of the lifting driving mechanism and above the liquid medicine box, a spraying pipe is arranged at the bottom of the lifting plate and above the conveying path of the wet tissue substrate, a spring pressing guide mechanism is arranged on the stand and below the two sides of the spraying pipe to guide the wet tissue substrate, a tension sensor is arranged on the stand and on the conveying path of the wet tissue substrate, the tension sensor is connected with a controller, the controller is connected with the lifting driving mechanism, the conveying tension of the wet tissue substrate is manually calibrated first, then automatic production is started, the tension sensor is used for monitoring the tension of the wet tissue substrate, and the conveying tension of the wet tissue substrate is automatically adjusted.

Description

Technical Field

[0001] This invention relates to the field of wet wipe production equipment, and more particularly to a tension control device and method for conveying wet wipe substrate. Background Technology

[0002] During the production of wet wipes, it is necessary to maintain the tension stability of the wet wipe substrate during the conveying process, so as to reduce problems such as slippage, wrinkles, stretching deformation and material breakage, and ensure the flatness and appearance quality of the wet wipes.

[0003] Tension control in wet wipes is typically achieved using motors on the winding and unwinding equipment. Tension is altered or maintained by braking or adjusting the motor's torque. However, due to the relatively long production line for wet wipes, tension fluctuations can still occur. For example, during the spraying and dispensing process, the solution exerts additional impact on the wet wipe substrate, causing tension fluctuations. Furthermore, the amount of solution sprayed is adjusted based on the product model and subsequent testing, further exacerbating the tension fluctuation problem, necessitating improvements. Summary of the Invention

[0004] The purpose of this invention is to provide a tension control device and method for conveying wet wipe substrate, thereby controlling the spraying and tension of the wet wipe substrate and improving the level of automation.

[0005] To achieve this objective, the present invention adopts the following technical solution: A tension control device for conveying wet wipe substrate includes: a base, a liquid container, a controller, a lifting drive mechanism, a tension sensor, a spray pipe, and a spring-loaded guide mechanism. The liquid container is mounted on the base and located below the conveying path of the wet wipe substrate. A stand is mounted on the base and located on one side of the liquid container. A cover plate is mounted on the top of the stand. The lifting drive mechanism is mounted on the cover plate. A lifting plate is mounted at the bottom of the lifting drive mechanism and located above the liquid container. The spray pipe is located at the bottom of the lifting plate and above the conveying path of the wet wipe substrate. The spring-loaded guide mechanism is mounted on the stand and located on both sides below the spray pipe to guide the wet wipe substrate. The tension sensor is mounted on the stand and located on the conveying path of the wet wipe substrate. The tension sensor is connected to the controller to send signals. The controller is connected to the lifting drive mechanism to control the lifting.

[0006] The lifting drive mechanism is an electric push rod.

[0007] The spray pipe has nozzles spaced at intervals at its bottom, distributed along the width of the wet wipe substrate.

[0008] The lifting plate is equipped with guide posts that extend upward through the cover plate.

[0009] It also includes a liquid pump, and a first water pipe is provided between the liquid pump outlet and the spray pipe.

[0010] A second water pipe is provided between the inlet of the liquid pump and the lower part of the liquid box.

[0011] The spring-loaded guiding mechanism includes a fixed roller, a floating roller, a spring, a vertical plate, and a wing plate. The fixed roller is horizontally arranged on the front of the vertical plate, the wing plate is horizontally arranged on the top of the vertical plate, and the floating roller is vertically arranged above the fixed roller. The floating roller is provided with a stud that extends upward through the wing plate, and the stud is provided with a nut located below the wing plate. The spring is located between the nut and the wing plate.

[0012] The spring is concentrically sleeved on the stud, and the wet wipe substrate passes between the fixed roller and the floating roller.

[0013] To achieve this objective, the present invention employs the following other technical solution: A method for controlling the conveying tension of a wet wipe substrate includes the following steps: The tension control device for conveying the wet wipe substrate is assembled on the wet wipe substrate conveying line, so that the wet wipe substrate passes through the elastic guide mechanism and the tension sensor; Adjust the nut in the spring-loaded guide mechanism to make the wet wipe substrate taut under the spray pipe; Turn on the liquid pump to send the liquid medicine into the spray pipe, use the nozzle to form a spray, and spray it onto the wet wipe substrate below to achieve liquid addition to the wet wipe substrate; Tension sensors are used to monitor the tension of wet wipe substrates to obtain real-time tension value a, and the target tension range is b. First, manually calibrate the conveying tension of the wet wipe substrate. If the real-time tension value a is greater than the target tension range b, loosen the nut and gradually release the spring until the real-time tension value a is within the target tension range b. If the real-time tension value a is less than the target tension range b, tighten the nut and gradually compress the spring until the real-time tension value a is within the target tension range b. Then, automated production is started, and the tension sensor continues to monitor the tension of the wet wipe substrate. The conveying tension of the wet wipe substrate is automatically adjusted. If the real-time tension value 'a' is greater than the target tension range 'b', the lifting mechanism drives the lifting plate to rise, increasing the distance between the spray pipe and the wet wipe substrate, gradually reducing the impact of the spray on the wet wipe substrate, until the real-time tension value 'a' is within the target tension range 'b'. If the real-time tension value 'a' is less than the target tension range 'b', the lifting mechanism drives the lifting plate to fall, reducing the distance between the spray pipe and the wet wipe substrate, gradually increasing the impact of the spray on the wet wipe substrate, until the real-time tension value 'a' is within the target tension range 'b'. The stroke of the lifting drive mechanism is limited. If the real-time tension value a is still not within the target tension range b when the lifting drive mechanism rises or falls to its limit, an alarm should be triggered, and the operator should manually calibrate the conveying tension of the wet wipe substrate again.

[0014] The beneficial effects of the present invention are as follows: A tension control device and method for conveying wet wipe substrate can spray wet wipe substrate and monitor the tension of wet wipe substrate in real time during spraying. By raising and lowering the spray pipe, the distance between the spray pipe and the wet wipe substrate is changed, thereby changing the impact force of the spray on the wet wipe substrate and maintaining the real-time tension value a within the target tension range b, thus achieving automatic tension control. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 A schematic diagram of the structure of the spring-loaded guide mechanism. Detailed Implementation

[0016] The following is combined Figures 1 to 2 The technical solution of the present invention will be further illustrated through specific embodiments.

[0017] like Figure 1 The tension control device for conveying wet wipe substrate shown is used for spraying and tension control of wet wipe substrate 7. It includes: liquid pump 15, base 1, liquid box 2, controller 10, lifting drive mechanism 8, tension sensor 4, spray pipe 5 and spring pressure guide mechanism 9. The liquid box 2 is set on the base 1 and located below the conveying path of wet wipe substrate 7. Liquid is injected into the liquid box 2, and it can also accept liquid dripping from above for recycling.

[0018] A support frame 3 is provided on the base 1, located on one side of the medicine box 2. A cover plate 11 is provided on the top of the support frame 3. The lifting drive mechanism 8 is provided on the cover plate 11. A lifting plate 12 is provided at the bottom of the lifting drive mechanism 8, located above the medicine box 2. In this embodiment, the lifting drive mechanism 8 adopts an electric push rod, which has high lifting control accuracy. The controller 10 can be a PLC. The controller 10 is connected to the lifting drive mechanism 8 to perform lifting control.

[0019] The spray pipe 5 is located at the bottom of the lifting plate 12 and above the conveying path of the wet wipe substrate 7. The spray pipe 5 is fixed by U-bolts and moves up and down with the lifting plate 12. In this embodiment, the lifting plate 12 is provided with a guide post 13 that extends upward through the cover plate 11 for guiding the lifting.

[0020] like Figure 1As shown, nozzles 6 are spaced apart at the bottom of the spray pipe 5 along the width direction of the wet wipe substrate 7 to atomize and spray the medicine downwards. In this embodiment, a first water pipe 14 is provided between the outlet of the liquid pump 15 and the spray pipe 5, and a second water pipe 16 is provided between the inlet of the liquid pump 15 and the lower part of the medicine box 2. When the liquid pump 15 is turned on, the medicine in the medicine box 2 is sent into the spray pipe 5. The liquid pump 15 can be controlled by the controller 10, or by a speed regulator installed separately.

[0021] The spring-loaded guide mechanism 9 is mounted on the stand 3 and located on both sides below the spray pipe 5 to guide the wet wipe substrate 7. Figure 2 As shown, the spring-loaded guide mechanism 9 includes a fixed roller 97, a floating roller 96, a spring 94, a vertical plate 91, and a wing plate 92. The vertical plate 91 is vertically fixed to the support frame 3 by screws, and the structure is stable.

[0022] The fixed roller 97 is horizontally positioned on the front of the upright plate 91 and rolls freely with the support of bearings. The wing plate 92 is horizontally positioned on the top of the upright plate 91, and the wing plate 92 and the upright plate 91 adopt an integrated L-shaped curved plate structure, which has high strength.

[0023] The floating roller 96 is vertically and flexibly positioned above the fixed roller 97. Two studs 93, extending upwards through the wing plate 92, guide the vertical movement of the floating roller 96. Nuts 95 are attached to the studs 93 below the wing plate 92. A spring 94 is located between the nut 95 and the wing plate 92, providing elastic support and exerting a downward elastic force on the floating roller 96.

[0024] like Figure 2 As shown, the spring 94 is concentrically sleeved on the stud 93, making assembly convenient. The wet wipe substrate 7 passes between the fixed roller 91 and the floating roller 96, which can both guide the wet wipe substrate 7 and apply elastic pressure to adjust the tension.

[0025] The tension sensor 4 is mounted on the stand 3 and positioned along the conveying path of the wet wipe substrate 7. The tension sensor 4 can be located between or to one side of the two spring-loaded guide mechanisms 9 to monitor the tension of the wet wipe substrate 7. In this embodiment, the tension sensor 4 is connected to the controller 10 to transmit signals, enabling real-time monitoring of the tension of the wet wipe substrate 7.

[0026] A method for controlling the conveying tension of a wet wipe substrate includes the following steps: The tension control device for conveying the wet wipe substrate 7 is assembled on the conveying line of the wet wipe substrate 7, so that the wet wipe substrate 7 passes through the elastic guide mechanism 9 and the tension sensor 4; Adjust the nut 95 in the spring-loaded guide mechanism 9 so that the wet wipe substrate 7 is in a taut state below the spray pipe 5; Turn on the liquid pump 15, adjust the speed of the liquid pump 15, and evenly send the liquid medicine into the spray pipe 5. Use the nozzle to form a spray and spray it onto the wet wipe substrate 7 below to achieve spraying and liquid addition to the wet wipe substrate 7. Tension sensor 4 is used to monitor the tension of wet wipe substrate 7, and the real-time tension value a is obtained, with the target tension range being b. First, manually calibrate the conveying tension of the wet wipe substrate 7. If the real-time tension value a is greater than the target tension range b, loosen the nut 95 and gradually release the spring 94 until the real-time tension value a is within the target tension range b. If the real-time tension value a is less than the target tension range b, tighten the nut 94. Figure 2 As shown, the spring is gradually compressed until the real-time tension value a is within the target tension range b. Then, automated production is initiated, and tension sensor 4 continues to monitor the tension of the wet wipe substrate 7. In case of an anomaly, controller 10 automatically adjusts the conveying tension of the wet wipe substrate 7. If the real-time tension value a is greater than the target tension range b, the lifting drive mechanism drives the lifting plate 12 to rise. Figure 1 As shown, by increasing the distance between the spray pipe 5 and the wet wipe substrate 7, the impact force of the spray on the wet wipe substrate 7 is gradually reduced until the real-time tension value a is within the target tension range b. If the real-time tension value a is less than the target tension range b, the lifting plate is driven to descend by the lifting drive mechanism to reduce the distance between the spray pipe 5 and the wet wipe substrate 7, thereby gradually increasing the impact force of the spray on the wet wipe substrate 7 until the real-time tension value a is within the target tension range b. The adjustment is highly automated.

[0027] In addition, the lifting stroke of the lifting drive mechanism 8 needs to be limited. When the lifting drive mechanism 8 rises or falls to its limit, if the real-time tension value a is still not within the target tension range b, the controller 10 should issue an alarm, and the operator should manually calibrate the conveying tension of the wet wipe substrate again, making it flexible to use.

[0028] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A tension control device for conveying wet wipe substrate, used for spraying and tension control of the wet wipe substrate, characterized in that, include: The device comprises a base, a medicine container, a controller, a lifting drive mechanism, a tension sensor, a spray pipe, and a spring-loaded guide mechanism. The medicine container is mounted on the base and located below the conveying path of the wet wipe substrate. A support frame is mounted on one side of the medicine container on the base. A cover plate is mounted on the top of the support frame. The lifting drive mechanism is mounted on the cover plate. A lifting plate is mounted at the bottom of the lifting drive mechanism and located above the medicine container. The spray pipe is located at the bottom of the lifting plate and above the conveying path of the wet wipe substrate. The spring-loaded guide mechanism is mounted on the support frame and located on both sides below the spray pipe to guide the wet wipe substrate. The tension sensor is mounted on the support frame and located on the conveying path of the wet wipe substrate. The tension sensor is connected to the controller for signal transmission. The controller is connected to the lifting drive mechanism for lifting control.

2. The tension control device for conveying wet wipe substrate according to claim 1, characterized in that, The lifting drive mechanism uses an electric push rod.

3. The tension control device for conveying wet wipe substrate according to claim 1, characterized in that, The bottom of the spray pipe is provided with nozzles that are spaced apart along the width direction of the wet wipe substrate.

4. The tension control device for conveying wet wipe substrate according to claim 1, characterized in that, The lifting plate is equipped with guide posts that extend upward through the cover plate.

5. The tension control device for conveying wet wipe substrate according to claim 1, characterized in that, It also includes a liquid pump, and a first water pipe is provided between the liquid pump outlet and the spray pipe.

6. The tension control device for conveying wet wipe substrate according to claim 5, characterized in that, A second water pipe is installed between the inlet of the liquid pump and the lower part of the liquid container.

7. The tension control device for conveying wet wipe substrate according to claim 1, characterized in that, The spring-loaded guide mechanism includes a fixed roller, a floating roller, a spring, a vertical plate, and a wing plate. The fixed roller is horizontally arranged on the front of the vertical plate, the wing plate is horizontally arranged on the top of the vertical plate, and the floating roller is vertically arranged above the fixed roller. The floating roller is provided with a stud that extends upward through the wing plate, and the stud is provided with a nut located below the wing plate. The spring is located between the nut and the wing plate.

8. The tension control device for conveying wet wipe substrate according to claim 7, characterized in that, The spring is concentrically sleeved on the stud, and the wet wipe substrate passes between the fixed roller and the floating roller.

9. A method for controlling the conveying tension of a wet wipe substrate, characterized in that, The tension control device for conveying wet wipe substrate according to claims 1-8 includes the following steps: The tension control device for conveying the wet wipe substrate is assembled on the wet wipe substrate conveying line, so that the wet wipe substrate passes through the elastic guide mechanism and the tension sensor; Adjust the nut in the spring-loaded guide mechanism to make the wet wipe substrate taut under the spray pipe; Turn on the liquid pump to send the liquid medicine into the spray pipe, use the nozzle to form a spray, and spray it onto the wet wipe substrate below to achieve liquid addition to the wet wipe substrate; Tension sensors are used to monitor the tension of wet wipe substrates to obtain real-time tension value a, and the target tension range is b. First, manually calibrate the conveying tension of the wet wipe substrate. If the real-time tension value a is greater than the target tension range b, loosen the nut and gradually release the spring until the real-time tension value a is within the target tension range b. If the real-time tension value a is less than the target tension range b, tighten the nut and gradually compress the spring until the real-time tension value a is within the target tension range b. Then, automated production is started, and the tension sensor continues to monitor the tension of the wet wipe substrate. The conveying tension of the wet wipe substrate is automatically adjusted. If the real-time tension value 'a' is greater than the target tension range 'b', the lifting mechanism drives the lifting plate to rise, increasing the distance between the spray pipe and the wet wipe substrate, gradually reducing the impact of the spray on the wet wipe substrate, until the real-time tension value 'a' is within the target tension range 'b'. If the real-time tension value 'a' is less than the target tension range 'b', the lifting mechanism drives the lifting plate to fall, reducing the distance between the spray pipe and the wet wipe substrate, gradually increasing the impact of the spray on the wet wipe substrate, until the real-time tension value 'a' is within the target tension range 'b'. The stroke of the lifting drive mechanism is limited. If the real-time tension value a is still not within the target tension range b when the lifting drive mechanism rises or falls to its limit, an alarm should be triggered, and the operator should manually calibrate the conveying tension of the wet wipe substrate again.

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