A winding mechanism of a perfluorinated ion exchange membrane casting machine

Abstract

The winding mechanism of the perfluoro ion exchange membrane casting machine provided by the present invention comprises a frame and a driving roller, a tension roller, a correction component and a winding roller which are sequentially arranged on the frame along the front-rear direction. The correction component comprises a correction bracket, a correction roller rotatably arranged on the correction bracket, and a correction sensor. The correction bracket and the frame are connected rotatably by utilizing a push rod motor. The correction roller can be driven to deflect by the rotation of the correction bracket, so that the film strip moves axially along the correction roller to achieve correction. Since the deflection angle enlarges the moving distance, precise control can be achieved and stability can be improved. The correction roller comprises a rigid roller body and a rubber ring embedded in a plurality of annular grooves on the roller body, so that the outer circumferential surfaces of the rubber ring and the roller body are flush. The rubber ring can be used to hinder the movement of the film strip on the correction roller, and a part of the energy driving the film strip to move is converted to the film strip, so that deformation occurs on both sides of the film strip, thereby balancing the tightness of both sides of the film strip.

Description

Technical Field

[0001] The invention relates to the technical field of tape casting machines, in particular to a winding mechanism of a perfluorinated ion exchange membrane tape casting machine. Background Art

[0002] In industries such as water electrolysis for hydrogen production, fuel cells, and chlor-alkali electrolysis, most of the ion exchange membranes used are perfluorinated ion exchange membranes. The batch continuous production method of this product mainly adopts the cast-film method. The cast-film method is a manufacturing method in which the slurry flows down from a hopper, is scraped and coated on a base tape with a certain thickness, and is peeled off after drying and curing to form a strip-shaped membrane product. It has the advantages of low cost, high quality, and simple production process. It is widely used, and a cast-film machine is required for production using the cast-film method.

[0003] The winding mechanism of the casting machine is one of the important parts of the casting machine. The winding mechanism needs to provide constant tension for winding. At the same time, the film strip needs to be corrected to ensure that the end of the film roll is neat after winding. The winding mechanism of the existing casting machine mostly realizes the correction through the axial movement of the correction roller. This method has at least the following disadvantages:

[0004] 1. The control accuracy is low. When the deflection correction roller moves, it directly drives the film belt wound on the deflection correction roller to move. It is basically a 1:1 deflection correction. When the deflection correction amplitude is small, it is very easy for the deflection correction roller to move excessively. After the deflection correction is in place, it needs to be reversed. Similarly, it is easy to over-correct during correction, which makes the deflection correction roller in a dynamic adjustment state of moving back and forth, and precise control cannot be achieved.

[0005] 2. The frequent back and forth movement of the deviation correction roller will cause the follow-up vibration of the entire equipment, affecting the smoothness of the slurry scraping and coating, and easily lead to uneven film thickness and poor stability.

[0006] 3. The method of correcting the film tape by moving the correction roller cannot balance the tightness on both sides of the film tape. After the film tape is wound into a film roll, the tightness uniformity at both ends of the film roll is poor. During the subsequent unwinding process, correction is required, which only treats the symptoms and not the root cause. Summary of the invention

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a winding mechanism for a casting machine for producing perfluorinated ion exchange membranes. The winding mechanism has high control accuracy and good stability for deviation correction and can balance the tightness on both sides of the membrane belt during deviation correction.

[0008] To achieve the above object, the technical solution provided by the present invention is that the winding mechanism of the perfluorinated ion exchange membrane casting machine comprises:

[0009] frame;

[0010] A driving roller, a tension roller and a winding roller are sequentially arranged on the frame along the front-back direction, and the rotation axis center lines of the driving roller, the tension roller and the winding roller are parallel to the horizontal plane;

[0011] A deflection correction component is arranged between the tension roller and the winding roller, the deflection correction component comprises a deflection correction bracket, a deflection correction roller rotatably arranged on the deflection correction bracket, and a deflection correction sensor for detecting the side position of the film tape, and the rotation axis of the deflection correction roller is parallel to the horizontal plane;

[0012] The deflection correction bracket is rotatably connected to the frame through a push rod motor, and the rotation axis of the deflection correction bracket is perpendicular to the horizontal plane. When the deflection correction bracket rotates, the deflection correction roller can deflect relative to the driving roller, the tension roller, and the winding roller, so that the film belt wound on the deflection correction roller moves along the axial direction of the deflection correction roller to achieve deflection correction. The deflection correction roller includes a roller body made of rigid material and a rubber ring embedded in a plurality of annular grooves on the roller body, the rubber ring and the outer circumferential surface of the roller body are flush, and the rubber ring is used to increase the friction between the deflection correction roller and the film belt to hinder the movement of the film belt on the deflection correction roller, thereby converting a part of the energy driving the film belt to move to the film belt, causing the film belt to deform, so as to balance the tightness of the two sides of the film belt wound on the deflection correction roller.

[0013] Preferably, one end of the push rod motor is rotatably connected to the bottom of the deviation correction bracket through a first rotating shaft, and the other end is rotatably connected to the frame through a second rotating shaft. The first rotating shaft is located on one side of the rotation axis centerline of the deviation correction bracket, and the virtual plane formed by the axis lines of the first and second rotating shafts intersects with the rotation axis centerline of the deviation correction roller.

[0014] Preferably, support units for supporting the rotation of the deviation correcting bracket are provided on both sides of the push rod motor, and the support units are arranged in an eight-shaped shape along the rotation axis of the deviation correcting bracket.

[0015] Further preferably, the support unit includes a rotating pair and a guide rail pair, the rotating axis of the rotating pair is movably connected to the slider of the guide rail pair, the moving direction of the rotating axis is perpendicular to the sliding direction of the slider, the angle between the sliding direction of the slider and the rotating axis centerline of the correcting roller is an acute angle, and the support unit decomposes the circular motion of the rotating axis along the rotating axis centerline of the correcting bracket into sliding along the sliding direction of the slider and movement perpendicular to the sliding direction of the slider.

[0016] Preferably, the deviation correction sensor is a slot-type photoelectric sensor, and the deviation correction sensor is arranged between the deviation correction roller and the winding roller to achieve feedback adjustment.

[0017] Preferably, a rotating bracket for mounting the tension roller is provided on the frame, and a rotation axis centerline of the rotating bracket is parallel to a rotation axis centerline of the tension roller and is located on one side of the tension roller.

[0018] Preferably, a pressure roller for pressing the film strip onto the driving roller is provided on the frame, and the pressure roller can move along the radial direction of the driving roller, and the pressure roller is a rubber roller.

[0019] Preferably, the winding roller has an air inflation function.

[0020] Preferably, the deflection correcting roller is also provided with a plurality of radial holes, which penetrate the rubber ring and / or the roller body, and are connected with an air pipe connected to the end of the deflection correcting roller through the internal cavity of the deflection correcting roller. The air pipe is used to provide positive pressure or negative pressure to the radial holes to adjust the friction between the film belt and the deflection correcting roller.

[0021] Further preferably, the pressure provided by the air pipe is related to the detection value of the deviation correction sensor.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0023] The winding mechanism of the perfluoro ion exchange membrane casting machine provided by the present invention comprises: a frame, a driving roller, a tension roller and a winding roller arranged on the frame in sequence along the front-back direction, and a correction component arranged between the tension roller and the winding roller, wherein the correction component comprises a correction bracket, a correction roller rotatably arranged on the correction bracket, and a correction sensor for detecting the side position of a film strip; the correction bracket and the frame are connected rotatably by using a push rod motor, the correction roller can be driven to deflect by the rotation of the correction bracket, so that the film strip moves axially along the correction roller to achieve correction, and the deflection angle enlarges the moving distance, so that precise control can be achieved and stability can be improved; the correction roller comprises a rigid roller body and a rubber ring embedded in a plurality of annular grooves on the roller body, so that the outer circumferential surfaces of the rubber ring and the roller body are flush, and the rubber ring can be used to hinder the movement of the film strip on the correction roller while avoiding wrinkles on the film strip, so that a part of the energy driving the film strip to move is converted to the film strip, so that both sides of the film strip are deformed, thereby balancing the tightness of both sides of the film strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 , Figure 2 , Figure 3 This is a three-dimensional schematic diagram of the first embodiment of the present invention. For easy observation, Figure 3 Some vertical plates, rollers and connecting rods are hidden.

[0025] Figure 4 yes Figure 1 Schematic diagram of the three-dimensional correction component.

[0026] Figure 5 It is an axial cross-sectional view of the deviation-correcting roller in the second embodiment of the present invention.

[0027] Among them: 10. Frame; 11. Rotating bracket; 12. Driving motor; 13. Winding motor; 14. Pressure roller; 15. Pressure roller cylinder; 16. Vertical plate; 17. Connecting rod; 18. Pass roller; 20. Driving roller; 30. Tension roller; 40. Winding roller; 50. Correction assembly; 51. Correction bracket; 511. Push rod motor; 512. First rotating shaft; 513. Second rotating shaft; 514. Support unit; 515. Rotating pair; 516. Guide pair; 517. Slider; 518. Guide rail; 52. Correction roller; 521. Roller body; 522. Annular groove; 523. Rubber ring; 524. Radial hole; 525. Cavity; 526. Air pipe; 53. Correction sensor. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] The up and down directions described in the present invention are Figure 1 The up-down direction in the present invention is Figure 1 The left and right directions in the present invention are described as Figure 1 The outside and inside directions.

[0030] Embodiment 1

[0031] like Figures 1 to 4As shown, the winding mechanism of the perfluorinated ion exchange membrane casting machine provided by the present invention comprises: a frame 10, a driving roller 20, a tension roller 30, a winding roller 40, and a deviation correction component 50, wherein the frame 10 is composed of two parallel vertical plates 16 and a plurality of connecting rods 17 connected between the two vertical plates 16, the driving roller 20, the tension roller 30, and the winding roller 40 are sequentially and rotatably arranged on the frame 10 along the front-back direction, and the rotation axis of the driving roller 20, the tension roller 30, and the winding roller 40 is parallel to the horizontal plane. A plurality of rollers 18 are provided between the driving roller 20 and the winding roller 40, and the rotation axis of the rollers 18 is parallel to the horizontal plane; the deflection correction assembly 50 is provided between the tension roller 30 and the winding roller 40, and specifically, the deflection correction assembly 50 comprises a deflection correction bracket 51, a deflection correction roller 52, and a deflection correction sensor 53 for detecting the side position of the film strip, and the cross section of the deflection correction bracket 51 is concave-shaped, and it has two side plates perpendicular to the horizontal plane and a bottom plate connected to the bottom of the two side plates, and the deflection correction roller 52 is rotatably mounted on the two side plates. On the side plate, the rotation axis of the correction roller 52 is parallel to the horizontal plane; in this embodiment, the bottom plate of the correction bracket 51 is rotatably connected to the frame 10 through the push rod motor 511, and the rotation axis of the bottom plate is perpendicular to the horizontal plane. When the correction bracket 51 rotates, the correction roller 52 can be horizontally deflected relative to the driving roller 20, the tension roller 30, and the winding roller 40, so that the film belt wound on the correction roller 52 moves along the axial direction of the correction roller 52 to achieve correction. The correction roller 52 includes a roller made of a rigid material. The main body 521 and the rubber ring 523 embedded in the multiple annular grooves 522 on the roller body 52, the outer circumferential surface of the rubber ring 523 is flush with the outer circumferential surface of the roller body 521 to avoid wrinkles of the perfluoro ion exchange membrane, and the rubber ring 523 is used to increase the friction between the deviation correction roller 52 and the membrane belt to hinder the movement of the membrane belt on the deviation correction roller 52, thereby converting part of the energy driving the membrane belt to move to the membrane belt, causing the side of the membrane belt to deform, so as to balance the tightness of the two sides of the membrane belt wrapped around the deviation correction roller 52.

[0032] The advantage of this arrangement is that it can not only realize the deviation correction of the film strip, but also balance the degree of winding on both sides of the film strip, so that the ends of the film roll after winding are neat and the tightness is uniform, and the deviation correction of the film strip can be fundamentally realized. The deflection angle is used to enlarge the distance that the film strip moves along the axial direction of the deviation correction roller, and a small angle deflection can be used to control the deviation correction over a larger distance, thereby achieving precise control. It is driven by a push rod motor, is not affected by air pressure fluctuations, does not generate jitter, and does not cause wrinkling of the perfluoro ion exchange membrane. The rotation axis of the deviation correction bracket is located on the center line of the entire winding mechanism. The rotation of the deviation correction bracket will not cause the entire winding mechanism to follow the vibration, will not affect the smoothness of the slurry scraping and coating, and has better stability.

[0033] In the present embodiment, one end of the push rod motor 511 is rotatably connected to the bottom plate of the deviation correction bracket 51 through the first rotating shaft 512, and the other end is rotatably connected to the frame 10 through the second rotating shaft 513. The first rotating shaft 512 is located on one side of the rotation axis centerline of the deviation correction bracket 51. The virtual plane formed by the axis lines of the first rotating shaft 512 and the second rotating shaft 513 intersects with the rotation axis centerline of the deviation correction roller 52. In order to better support the deviation correction bracket 51, support units 514 for supporting the rotation of the deviation correction bracket 51 are also provided on both sides of the push rod motor 511. The support units 514 are in an eight-shaped shape along the rotation axis centerline of the deviation correction bracket 51. Specifically, the support unit 514 includes a rotating pair 515 and a guide pair 516, the rotating axis of the rotating pair 515 is movably connected to the slider 517 of the guide pair 516, the moving direction of the rotating axis of the rotating pair 515 is perpendicular to the sliding direction of the slider 517, the angle between the sliding direction of the slider 517 and the rotating axis centerline of the correcting roller 52 is an acute angle, the support unit 514 decomposes the circular motion of the rotating axis of the rotating pair 515 along the rotating axis centerline of the correcting bracket 51 into sliding along the sliding direction of the slider 517 and movement perpendicular to the sliding direction of the slider 517, so as to realize a more balanced and stable rotation support.

[0034] In this embodiment, the deflection correction sensor 53 is a slot-type photoelectric sensor. The deflection correction sensor 53 is arranged between the deflection correction roller 52 and the winding roller 40 to realize feedback adjustment. A rotating bracket 11 for mounting the tension roller 30 is provided on the frame 10. The rotation axis of the rotating bracket 11 is parallel to the rotation axis of the tension roller 30 and is located on one side of the tension roller 30. The driving motor 12 that drives the driving roller 20 to rotate adjusts the speed of the driving roller 20 according to the rotation angle of the rotating bracket 11 to match the constant speed rotation of the winding roller 40 driven by the winding motor 13, so that the line of the film belt on the driving roller 20 is The speed is equal to the linear speed of the outermost side of the film roll on the winding roller 40. In order to avoid slipping between the film tape and the driving roller 20, a pressure roller 14 for pressing the film tape onto the driving roller 20 is further provided on the frame 10. The pressure roller 14 is located directly above the driving roller 20. The pressure roller 14 can move in the radial direction (up and down direction) of the driving roller 20. The pressure roller 14 is a rubber roller. In order to realize the movement of the pressure roller 20, a pressure roller cylinder 15 is further provided on the frame 10. The two ends of the pressure roller 14 are fixedly connected to the ends of the cylinder rod of the pressure roller cylinder 15. In order to avoid slipping between the film roll and the winding roller 40, the winding roller 40 also has an air inflation function.

[0035] Embodiment 2

[0036] The second embodiment is basically the same as the first embodiment, except that Figure 5As shown, the deflection correcting roller 52 is also provided with a plurality of radial holes 524, which penetrate the rubber ring 523 and / or the roller body 521, and are connected to an air pipe 526 connected to the end of the deflection correcting roller 52 through an internal cavity 525 of the deflection correcting roller 52. The air pipe 526 is used to provide positive pressure or negative pressure to the radial holes 524 to adjust the friction between the film belt and the deflection correcting roller 52.

[0037] In this embodiment, the pressure provided by the air pipe 526 is related to the detection value of the correction sensor 53. Specifically, the allowable deviation value of the film tape side is ±0.3mm. When the correction sensor 53 detects that the deviation value of the film tape side exceeds this range, the correction bracket 51 rotates to drive the correction roller 52 to deflect and realize correction. At the same time, if the correction sensor 53 detects that the deviation value of the film tape side exceeds 0.6mm (this situation usually occurs when the material head is rolled up), the air pipe 526 provides positive pressure to the radial hole 524 to form an air film between the film tape and the correction roller 52, so as to quickly straighten the film tape and realize fast The purpose of fast deviation correction is to correct the deviation of the film strip side by the correction sensor 53; if the deviation value of the film strip side detected by the correction sensor 53 is 0.45-0.6mm, the air pipe 526 provides negative pressure to the radial hole 524 to adsorb the film strip on the correction roller 52, thereby cooperating with the rubber ring 523 to accelerate the deformation of the film strip side to balance the tightness of the two sides of the film strip. When the deviation value of the film strip side detected by the correction sensor 53 is 0.3-0.45mm, the air pipe 526 is consistent with the external pressure, and only the basic friction force provided by the rubber ring 523 on the correction roller 52 causes the film strip side to deform to balance the tightness of the two sides of the film strip. This setting can achieve reasonable adjustment according to the actual deviation of the film strip side, so as to achieve the purpose of fast and stable deviation correction and balanced tightness of the two sides of the film roll.

[0038] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A winding mechanism of a perfluorinated ion exchange membrane casting machine, comprising: frame; A driving roller, a tension roller and a winding roller are sequentially arranged on the frame along the front-rear direction; A deflection correction component is arranged between the tension roller and the winding roller, and the deflection correction component includes a deflection correction bracket, a deflection correction roller rotatably arranged on the deflection correction bracket, and a deflection correction sensor for detecting the side position of the film strip; Features: The deflection correction bracket is rotatably connected to the frame through a push rod motor. When the deflection correction bracket rotates, the deflection correction roller can deflect relative to the driving roller, the tension roller and the winding roller, so that the film belt wound on the deflection correction roller moves along the axial direction of the deflection correction roller. The deflection correction roller includes a roller body made of rigid material and a rubber ring embedded in a plurality of annular grooves on the roller body. The outer circumferential surfaces of the rubber ring and the roller body are flush. The rubber ring is used to hinder the movement of the film belt on the deflection correction roller, and convert a part of the energy driving the film belt to move to the film belt, so that the film belt is deformed to balance the tightness on both sides of the film belt. One end of the push rod motor is rotatably connected to the bottom of the deviation correcting bracket through a first rotating shaft, and the other end is rotatably connected to the frame through a second rotating shaft, and the first rotating shaft is located on one side of the rotation axis of the deviation correcting bracket; Support units for supporting the rotation of the deviation correcting bracket are arranged on both sides of the push rod motor, and the support units are arranged in an eight-shaped shape along the rotation axis of the deviation correcting bracket.

2. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1 is characterized in that: The support unit comprises a rotating pair and a guide rail pair. The rotating shaft of the rotating pair is movably connected to the slider of the guide rail pair. The moving direction of the rotating shaft is perpendicular to the sliding direction of the slider.

3. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1 is characterized in that: The deviation correction sensor is arranged between the deviation correction roller and the winding roller.

4. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1 is characterized in that: The frame is provided with a rotating bracket for mounting the tension roller, the rotating axis center line of the rotating bracket is parallel to the rotating axis center line of the tension roller and is located on one side of the tension roller.

5. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1 is characterized in that: The frame is provided with a pressing roller for pressing the film strip onto the driving roller. The pressing roller can move along the radial direction of the driving roller, and the pressing roller is a rubber roller.

6. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1, characterized in that: The winding roller has an air inflation function.

7. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 1 is characterized in that: The deflection correcting roller is also provided with a plurality of radial holes, which penetrate the rubber ring and / or the roller body and are connected with an air pipe connected to the end of the deflection correcting roller through the internal cavity of the deflection correcting roller. The air pipe is used to provide positive pressure or negative pressure to the radial holes to adjust the friction between the film belt and the deflection correcting roller.

8. The winding mechanism of the perfluorinated ion exchange membrane casting machine according to claim 7, characterized in that: The pressure provided by the air pipe is related to the detection value of the deviation correction sensor.

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