Servo adjusting device for preventing surface of copper foil from carrying liquid

Abstract

The utility model provides a servo adjusting device for preventing the surface of a copper foil from carrying liquid, which comprises a liquid blocking roller used for scraping anti-oxidation liquid on the surface of the copper foil; the supporting frame is used for supporting the servo adjusting device and comprises a liquid blocking roller; the sliding block is connected with the sliding groove in a matched mode, connected with the liquid blocking roller through a bearing seat and used for driving the liquid blocking roller to move; the sliding groove is connected with the supporting frame and used for guiding the sliding block; the servo electric cylinder is connected with the sliding block and used for driving the sliding block to move on the supporting frame and controlling the distance between the liquid blocking roller and the copper foil. According to the device, the liquid blocking roller is additionally arranged, the distance between the liquid blocking roller and the surface of the copper foil is controlled through the servo electric cylinder, accurate positioning is achieved, part of anti-oxidation liquid on the surface of the copper foil is scraped firstly, and based on the achievement of the function of the liquid blocking roller, the pressing force of the liquid blocking roller is reduced in the subsequent steps; the copper foil is prevented from being damaged or wrinkled due to too large pressing force, and redundant anti-oxidation liquid on the surface of the copper foil can be effectively removed.

Description

Technical Field

[0001] The present application relates to the technical field of lithium battery copper foil production, and in particular to a servo adjustment device for preventing liquid from being carried on the surface of the copper foil. Background Art

[0002] When copper foil is exposed to air, its surface is susceptible to oxidation. Surface oxidation is fatal to copper foil. On the one hand, oxidation reduces the tensile strength of the copper foil itself; on the other hand, as the negative electrode carrier in lithium-ion batteries, oxidation increases the interfacial resistance between the copper foil and the negative electrode. Surface oxidation of copper foil not only affects the reliability of lithium-ion batteries but also poses safety concerns. Therefore, electrolytic copper foil must undergo an anti-oxidation treatment before winding to ensure that the foil possesses a certain level of antioxidant properties.

[0003] During the anti-oxidation treatment, the copper foil is immersed in an anti-oxidation solution and passed through the anti-oxidation solution anode plate at a constant speed. Under the action of the electric current, a thin anti-oxidation film is evenly deposited on both sides of the copper foil. This film effectively prevents oxidation on the copper foil surface. After this process, the copper foil emerges from the anti-oxidation solution with a layer of anti-oxidation solution on its surface. During the winding process, this layer of anti-oxidation solution must be removed from the copper foil surface. Otherwise, the anti-oxidation solution will accumulate between the copper foil and the guide roller, which can easily cause wrinkles in the copper foil.

[0004] Currently, a combination of a squeegee roller and an air knife is commonly used to remove the anti-oxidant liquid from the copper foil surface. In the first step, a squeegee roller squeezes out a portion of the anti-oxidant liquid; in the second step, a hot air knife removes the remaining anti-oxidant liquid. To effectively dry the anti-oxidant liquid from the copper foil surface, the squeegee step is particularly important, as the greater the amount of squeegee, the easier it is to dry the copper foil surface. Typically, the squeegee roller is made of rubber, while the opposing guide roller is made of steel. The tightness of the contact between the squeegee roller and the guide roller directly affects the effectiveness of the squeegee. To remove more anti-oxidant liquid, the gap between the squeegee roller and the guide roller needs to be adjusted to a smaller distance to achieve a greater squeegee force. In this case, excessive squeegee force can easily cause deformation of the copper foil and increase wear on the squeegee roller. Over time, uneven wear of the squeegee roller can cause localized squeegee on the copper foil surface. Therefore, simply increasing squeegee force is not a sufficient solution to squeegee surface squeegee. Summary of the Invention

[0005] In response to the defects in the prior art, the purpose of this application is to provide a servo adjustment device for preventing the surface of copper foil from being stained with liquid. By adding a liquid-blocking roller and adjusting the distance between the liquid-blocking roller and the surface of the copper foil, a part of the anti-oxidation liquid on the surface of the copper foil is scraped off first, so that the pressing force of the liquid-blocking roller can be reduced in subsequent steps, and the excess anti-oxidation liquid on the surface of the copper foil can also be effectively removed. The servo electric cylinder is used for automatic adjustment to control the distance between the liquid-blocking roller and the surface of the copper foil for precise positioning.

[0006] In one aspect of the present application, a servo adjustment device for preventing liquid from being carried on the surface of a copper foil is provided, comprising: a liquid blocking roller, a support frame, a slide chute, a slider, and a servo electric cylinder;

[0007] The liquid-blocking roller is used to scrape off the anti-oxidation liquid on the surface of the copper foil;

[0008] The support frame is used to support the servo adjustment device, including the liquid blocking roller;

[0009] The slider is connected to the slide groove and the liquid blocking roller, and is used to drive the liquid blocking roller to move;

[0010] The slide groove is connected to the support frame and is used to guide the slider;

[0011] The servo electric cylinder is connected to the slider and is used to drive the slider to move on the support frame to control the distance between the liquid blocking roller and the copper foil.

[0012] Furthermore, bearings are provided at both ends of the liquid-blocking roller, and the liquid-blocking roller is rotatably connected to the bearings;

[0013] A bearing seat is provided at one end of the support frame connected to the liquid-blocking roller. The bearing seat is rotatably connected to the bearing and is used to support the liquid-blocking roller.

[0014] Furthermore, one end of the bearing seat is fixedly connected to the slider and is movable along with the slider.

[0015] Furthermore, the slide groove is provided on the support frame and is fastened to the support frame by bolts and nuts, and is used to guide the slider.

[0016] Furthermore, the slide groove is a linear groove with limit blocks provided at both ends for limiting the moving distance of the slider.

[0017] Furthermore, the sliding block has a protrusion matching the linear groove and can slide in the linear groove.

[0018] Furthermore, the servo electric cylinder includes a mechanical motion component, one end of which is connected to the end of the slider through a thread, and can move back and forth and drive the slider to move.

[0019] Furthermore, a pressure sensor is provided inside the servo electric cylinder, which adjusts the position of the mechanical motion component by monitoring the pressure and comparing it with the set pressure value. The target pressure setting range is 0.1-10 kgf, which can be adjusted according to the surface liquid.

[0020] Furthermore, both ends of the inner core of the liquid-blocking roller are provided with extended thin shafts, and the inner core of the liquid-blocking roller is connected to the bearing via the thin shafts;

[0021] The inner core of the liquid-blocking roller has a diameter of 50 mm and a length of 1400 mm;

[0022] The thin shaft is made of stainless steel, with a diameter of 30 mm and a length of 50 mm;

[0023] The outer shell of the liquid-blocking roller is made of rubber.

[0024] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0025] 1. The utility model adopts tension servo control to adjust the contact between the liquid blocking roller and the copper foil surface. Compared with manual adjustment, the adjustment accuracy and left-right consistency are higher, and the anti-oxidation liquid on the copper foil surface can be evenly scraped off to prevent the occurrence of local liquid.

[0026] 2. The utility model adopts a liquid-blocking roller to assist in scraping off the anti-oxidation liquid on the surface of the copper foil, which can effectively reduce the tightening force of the liquid-blocking roller in the subsequent process, slow down the wear of the liquid-blocking roller, extend the service life of the liquid-blocking roller, improve the stability of the production line, and reduce production costs.

[0027] 3. The utility model can further reduce the problem of liquid on the surface of copper foil by adding a liquid blocking roller, effectively solve the problem of liquid accumulation on the guide roller and the wrinkles caused by it, and improve the product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0029] Figure 1 This is a diagram of the installation structure of a liquid-blocking roller of a servo adjustment device for preventing liquid from being carried on the surface of a copper foil in one embodiment of the present application.

[0030] Figure 2 This is an overall structural diagram of a servo adjustment device for preventing liquid from being carried on the surface of copper foil according to an embodiment of the present application.

[0031] Figure 3 This is a schematic diagram of the slider and slide groove structure of an embodiment of the present application.

[0032] Figure 4This is a schematic diagram of the servo electric cylinder control principle according to an embodiment of the present application.

[0033] In the figure: 1. Foil machine frame; 2. Cathode roller; 3. Copper foil; 4. Peeling roller; 5. Peeling guide roller; 6. Lower liquid roller; 7. Second lower liquid roller; 8. Liquid extrusion guide roller; 9. Liquid extrusion roller; 10. Tension roller; 11. Winding guide roller; 12. Winding roller; 13. Liquid blocking roller; 21. Bearing seat; 22. Slider; 23. Slide; 24. Servo electric cylinder; 25. Support frame; 26. Bearing; 131. Liquid blocking roller outer shell; 132. Liquid blocking roller inner core; 33. Limit block; 41. Servo motor; 42. Mechanical motion component; 43. Pressure sensor. DETAILED DESCRIPTION

[0034] The present application is described in detail below with reference to specific embodiments. The following embodiments will help those skilled in the art to further understand the present application, but are not intended to limit the present application in any form. It should be noted that those skilled in the art may make several variations and improvements without departing from the scope of the present application. These all fall within the scope of protection of the present application.

[0035] Reference Figure 1 As shown in FIG, a servo adjustment device for preventing liquid from being carried on the surface of copper foil according to an embodiment of the present application includes a liquid blocking roller 13 , a support frame 25 , a slider 22 , a slide 23 , and a servo electric cylinder 24 .

[0036] The liquid-blocking roller 13 is used to scrape off the anti-oxidation liquid on the surface of the copper foil 3; the support frame 25 is connected to the foil machine frame 1 and is used to support the servo adjustment device, including the liquid-blocking roller 13; the slider 22 is connected to the chute 23 and is connected to the liquid-blocking roller 13, and is used to drive the liquid-blocking roller 13 to move; the chute 23 is connected to the support frame 25 and is used to guide the slider 22; the servo electric cylinder 24 is connected to the slider 22, and is used to drive the slider 22 to move on the support frame 25 to control the distance between the liquid-blocking roller 13 and the copper foil 3.

[0037] The present application adds a liquid-blocking roller 13, adjusts the distance between the liquid-blocking roller 13 and the surface of the copper foil 3, and first scrapes off a portion of the anti-oxidation liquid on the surface of the copper foil 3, thereby reducing the pressing force of the liquid-blocking roller in subsequent steps, and can also effectively remove excess anti-oxidation liquid on the surface of the copper foil 3, and automatically adjusts through the servo electric cylinder 24 to control the distance between the liquid-blocking roller 13 and the surface of the copper foil 3 for precise positioning.

[0038] Specifically, during operation, the liquid-blocking roller 13 is installed on the support frame 25 to scrape off excess anti-oxidation liquid on the surface of the copper foil 3; then, the slider 22 is slidably set on the support frame 25, and is connected to the liquid-blocking roller 13 through the bearing seat 21. One end of the mechanical motion component on the servo electric cylinder 24 is connected to the slider 22 through a thread, which serves as the power source for the movement of the slider 22, driving the slider 22 to move, and the slider 22 drives the liquid-blocking roller 13 to move, adjusting the distance between the liquid-blocking roller 13 and the copper foil 3 to achieve the effect of scraping off the anti-oxidation liquid on the surface of the copper foil 3.

[0039] In some possible embodiments, in the servo adjustment device for preventing the surface of the copper foil from being stained with liquid in the above-mentioned embodiment, bearings 26 are provided at both ends of the liquid-blocking roller 13, and the liquid-blocking roller 13 is rotatably connected to the bearings 26; the end of the support frame 25 connected to the liquid-blocking roller 13 is provided with a bearing seat 21, and the bearing seat 21 is rotatably connected to the bearing 26 for supporting the liquid-blocking roller 12.

[0040] The liquid-blocking roller 13 is rotated by bearings 26 at both ends, and a bearing seat 21 connected to the bearing 26 is provided on the support frame 25, which is used to rotatably connect the liquid-blocking roller 13 with the bearing seat 21 connected to the slider 22 through the bearing 26, and realize the overall movement of the liquid-blocking roller 13 through the movable slider 22 on the support frame 25. Figure 2 As shown, in some possible embodiments, the servo adjustment device for preventing the copper foil surface from being stained with liquid in the above embodiment may further include two submerged rollers 7 and a liquid agent roller, and the liquid blocking roller 13 is arranged between the two submerged rollers 7 and the liquid agent roller.

[0041] Specifically, it includes a foil machine frame 1, a cathode roller 2, a copper foil 3, a peeling roller 4, a peeling guide roller 5, a lower liquid roller 6, a second submerged roller 7, an extrusion guide roller 8, an extrusion roller 9, a tension roller 10, a winding guide roller 11, a winding roller 12, and a liquid blocking roller 13; during operation, the copper foil 3 is peeled off from the cathode roller 2, passes through different rollers, and is finally wound on the winding roller 12. In this embodiment, the additional liquid blocking roller 13 is installed between the second submerged roller 7 and the extrusion guide roller 8.

[0042] In some possible embodiments, in the servo adjustment device for preventing liquid from being carried on the surface of the copper foil in the above embodiment, the liquid-blocking roller 13 includes a liquid-blocking roller inner core 132, both ends of which are respectively connected to the bearings 26 and can rotate relative to the bearings 26; the liquid-blocking roller outer shell 131 is wrapped around the outer peripheral wall of the liquid-blocking roller inner core 132.

[0043] Among them, extended thin shafts are provided at both ends of the liquid-blocking roller inner core 132, and the liquid-blocking roller inner core 132 is connected to the bearing 26 through the thin shafts; the diameter of the liquid-blocking roller inner core 132 is 50mm and the length is 1400mm; the thin shaft is made of stainless steel, with a diameter of 30mm and a length of 50mm; the liquid-blocking roller outer shell 131 is made of rubber.

[0044] Specifically, it includes a liquid-blocking roller 13, a bearing seat 21, a slider 22, a servo electric cylinder 24, and a support frame 25. The liquid-blocking roller inner core 132 is a stainless steel round shaft with a certain degree of rigidity and corrosion resistance, a diameter of 50 mm, and a length of 1400 mm. A thin shaft 50 mm long and 30 mm in diameter is extended from each end, forming an interference fit with the bearing 26. The axial displacement of the bearing 26 is limited by the shaft shoulder and the bearing cover. The liquid-blocking roller outer shell 131 is made of rubber, has a certain degree of elasticity and acid resistance, and is directly wrapped around the liquid-blocking roller inner core 132. It has an outer diameter of 80 mm and a length of 1400 mm. The liquid-blocking roller 13 can rotate around the axis or move as a whole. The purpose is to adjust the contact between the liquid-blocking roller 13 and the surface of the copper foil 3 by movement, thereby achieving the effect of scraping off the anti-oxidation liquid.

[0045] When the liquid-blocking roller 13 is not in contact with the surface of the copper foil 3, it cannot scrape off the anti-oxidation liquid on the surface of the copper foil 3. However, when the liquid-blocking roller 13 is in too tight contact with the surface of the copper foil 3, it will change the tension of the copper foil 3 too much, affecting the winding of the copper foil 3. Therefore, the moving distance of the liquid-blocking roller 13 should be designed to be adjustable. If manual adjustment is used, the operation is simple, but the accuracy is not enough, mainly because it is difficult to maintain balance on the left and right sides. This application uses a servo electric cylinder 24 for regulation.

[0046] In some possible embodiments, in the servo adjustment device for preventing the copper foil surface from being stained with liquid in the above embodiment, one end of the bearing seat 21 is fixedly connected to the slider 22 and is movable with the slider 22 .

[0047] By connecting the bearing seat 21 and the slider 22 with bolts and nuts, the bearing seat 21 moves with the slider 22 during the movement of the slider 22. The bearing and the liquid-blocking roller 13 are fixed on the bearing seat 21 and move together with the bearing seat 21 to realize the overall movement of the liquid-blocking roller 13.

[0048] In some possible embodiments, in the servo adjustment device for preventing liquid from being carried on the surface of the copper foil in the above embodiment, the slide 23 is provided on the support frame 25 and is fastened to the support frame 25 by bolts and nuts to guide the slider 22.

[0049] Specifically, the support frame 25 is used to connect the raw foil machine frame 1 and the chute 23, and at the same time supports the liquid-blocking roller 13 and components; the support frame 25 is made of acid mist corrosion-resistant stainless steel, and the flatness of its upper and lower surfaces is 0.02mm / m; the support frame 25 is fastened to the raw foil machine frame 1 by bolts and nuts, and the chute 23 is installed on the support frame 25. The flatness of the lower mounting surface of the chute 23 and the contact surface between the chute 23 and the slider 22 are both 0.02mm / m, and the bearing seat 21 is fastened to the slider 22 by screws. The bearing seat 21 can move with the movement of the slider 22. The flatness of the contact surface between the slider 22 and the bearing seat 21 is 0.02mm / m. The slider 22 is connected to the actuator on the servo electric cylinder 24. The servo electric cylinder 24 can directly drive the slider 22 to move through feedback information, and drive the bearing seat 21 and the liquid-blocking roller 13 to move, so that the position of the liquid-blocking roller 13 can be adjusted.

[0050] In some possible embodiments, in the servo adjustment device for preventing liquid from being carried on the surface of the copper foil in the above embodiment, the slide groove 23 is a linear groove with limit blocks 33 provided at both ends for limiting the moving distance of the slider 22 .

[0051] The slider 22 has a protrusion that matches the linear groove and can slide in the linear groove.

[0052] like Figure 3 As shown, the chute 23 is a linear groove, and the lower half of the slider 22 is a convex block, which matches the shape of the chute 23 and can move back and forth in the chute 23. The limit blocks 33 are installed at both ends of the linear groove to limit the movement of the slider 22. From a mechanical structure perspective, it prevents the slider 22 from moving excessively, causing the liquid-blocking roller 13 to over-extrude the copper foil 3 or detach from the chute 23. The chute 23, the slider 22 and the limit blocks 33 are all made of stainless steel that is resistant to acid mist corrosion.

[0053] In some possible embodiments, in the servo adjustment device for preventing liquid from being carried on the surface of the copper foil in the above embodiment, the servo electric cylinder 24 includes a mechanical motion component 42, one end of which is connected to the end of the slider 22 by a thread, and can move back and forth and drive the slider 22 to move; a pressure sensor 43 is provided inside the servo electric cylinder 24, which adjusts the position of the mechanical motion component by monitoring the pressure and comparing it with the set pressure value. The target pressure setting range is 0.1-10kgf, which can be adjusted according to the liquid on the surface.

[0054] The pressure sensor 43 is used to monitor the pressure between the liquid-blocking roller 13 and the copper foil 3 in real time; the servo motor 41 is connected to the mechanical motion component, and is used to control the speed and torque of the motor based on the comparison result of the pressure monitored by the feedback pressure sensor 43 and the set pressure value, and adjust the position between the liquid-blocking roller 13 and the copper foil 3 through the mechanical motion component.

[0055] Specifically, first, one end of the mechanical motion component 42 of the servo electric cylinder 24 is connected to the slider 22, and the other end is connected to the servo motor 41. The servo motor 41 provides power for the mechanical motion component 42, drives the mechanical motion component 42 to operate, drives the slider 22 to move, and the slider 22 drives the bearing seat 21 to move, adjusts the distance between the liquid blocking roller 13 and the copper foil 3. During the movement, the pressure sensor 43 monitors the pressure data between the liquid blocking roller 13 and the copper foil 3 in real time, and compares the pressure data with the set pressure value. Through the feedback comparison result control, the speed and torque of the servo motor 41 are controlled to achieve precise control of the moving distance and improve the accuracy of automatic control.

[0056] In the above embodiment, the set pressure range is 0.1-10 kgf, which can be adjusted according to the surface liquid.

[0057] like Figure 4 As shown, during the control process, the pressure sensor 43 is monitored in real time, and the relative position between the liquid blocking roller 13 and the copper foil 3 is adjusted by feedback of the pressure data. When the pressure value is zero, it indicates that there is basically no contact between the liquid blocking roller 13 and the copper foil 3. At this time, the servo motor 41 receives the pressure data, converts the pressure information into torque and speed to drive the mechanical motion component 42, and transmits the motion to the slider 22 through the mechanical motion component 42, and finally drives the liquid blocking roller 13 close to the copper foil 3. When the liquid blocking roller 13 and the copper foil 3 come into slight contact, the pressure data can be detected by the pressure sensor 43, and the pressure data is fed back to the control module in the servo motor 41. The control module compares the pressure data obtained by the detection with the pressure data set by the system. If the detected pressure data is less than the system set pressure data, the servo motor 41 continues to drive the mechanical motion component 42 to move, so that the liquid blocking roller 13 continues to move toward the copper foil 3; if the detected pressure data is greater than the system set pressure data, the liquid blocking roller 13 will move back; finally, the pressure data detected by the pressure sensor 43 is equal to the system set value, and the liquid blocking roller 13 no longer moves. In this embodiment, the pressure value range set in the system is 0.1-10 kgf, and the specific value needs to be determined according to the subsequent squeezing and air-drying status.

[0058] The present application adds a liquid-blocking roller 13 between the submerged roller and the liquid-dosing roller, and by adjusting the distance between the liquid-blocking roller 13 and the surface of the copper foil 3, a portion of the anti-oxidation liquid on the surface of the copper foil 3 is scraped off first. The anti-oxidation liquid on the surface of the copper foil 3 is first removed by the liquid-blocking roller 13, and then the liquid-squeezing roller 9 is used to effectively remove the anti-oxidation liquid under a lower pressing force, thereby eliminating the disadvantages of the current liquid-dosing method and increasing the effect of removing the surface anti-oxidation liquid. As a result, the pressing force of the liquid-dosing roller can be reduced in subsequent steps, and the excess anti-oxidation liquid on the surface of the copper foil 3 can also be effectively removed. Automatic adjustment is performed through the servo electric cylinder 24 to achieve precise positioning.

[0059] The above describes the specific embodiments of the present application. It should be understood that the present application is not limited to the specific embodiments described above, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the substantive content of the present application. The above preferred features may be used in any combination as long as they do not conflict with each other.

Claims

1. A servo adjustment device for preventing liquid from being carried on the surface of copper foil, characterized in that: include: Liquid-blocking roller, support frame, slide, slider and servo electric cylinder; The liquid-blocking roller is used to scrape off the anti-oxidation liquid on the surface of the copper foil; The support frame is used to support the servo adjustment device, including the liquid blocking roller; The slider is connected to the slide groove and the liquid blocking roller, and is used to drive the liquid blocking roller to move; The slide groove is connected to the support frame and is used to guide the slider; The servo electric cylinder is connected to the slider and is used to drive the slider to move on the support frame to control the distance between the liquid blocking roller and the copper foil.

2. A servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 1, characterized in that: Bearings are provided at both ends of the liquid-blocking roller, and the liquid-blocking roller is rotatably connected to the bearings; A bearing seat is provided at one end of the support frame connected to the liquid-blocking roller. The bearing seat is rotatably connected to the bearing and is used to support the liquid-blocking roller.

3. A servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 2, characterized in that: One end of the bearing seat is fixedly connected to the slider and is movable along with the slider.

4. The servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 1, characterized in that: The slide groove is arranged on the support frame and is fastened to the support frame by bolts and nuts, and is used for guiding the sliding block.

5. A servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 4, characterized in that: The slide groove is a linear groove with limit blocks at both ends for limiting the moving distance of the slider.

6. A servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 5, characterized in that: The sliding block is provided with a protrusion matching the linear groove and can slide in the linear groove.

7. The servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 1, characterized in that: The servo electric cylinder includes a mechanical motion component, one end of which is connected to the end of the slider through a thread, and can move back and forth and drive the slider to move.

8. The servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 7, characterized in that: The servo electric cylinder has a pressure sensor inside, which adjusts the position of the mechanical motion component by monitoring the pressure and comparing it with the set pressure value. The target pressure setting range is 0.1-10kgf and can be adjusted according to the surface liquid.

9. The servo adjustment device for preventing liquid from being carried on the surface of copper foil according to claim 2, characterized in that: Both ends of the inner core of the liquid-blocking roller are provided with extended thin shafts, and the inner core of the liquid-blocking roller is connected to the bearing through the thin shafts; The inner core of the liquid-blocking roller has a diameter of 50 mm and a length of 1400 mm; The thin shaft is made of stainless steel, with a diameter of 30 mm and a length of 50 mm; The outer shell of the liquid-blocking roller is made of rubber.

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