Safety winding device for co-extrusion film production

Abstract

The utility model provides a kind of safety winding device for coextrusion film production, it solves the problem that membrane roll diameter increases in the existing coextrusion film winding process and causes tension to continue to rise, is prone to cause membrane material damage or unstable winding. Including base and two vertical plates set on base, rotationally connected with winding shaft between two vertical plates;One vertical plate inside is equipped with driving mechanism, driving mechanism includes the driving motor connected with base, driving wheel and driven wheel vertically arranged, the output shaft of driving motor is connected with driving wheel, driven wheel is arranged at the end of winding shaft, and driving wheel and driven wheel are connected by synchronous belt;Winding shaft below is equipped with guide rail parallel with it, guide rail is slidably connected with adjusting block, one side of adjusting block close to driving mechanism is rotatably connected with speed regulating gear, and the other side is equipped with inclined downward guide slope;Guide slope cooperates with coextrusion film roll on winding shaft, and speed regulating gear cooperates with driving mechanism to speed regulating driven wheel.

Description

Technical Field

[0001] This application relates to the field of co-extrusion film production equipment technology, and more specifically, to a safe winding device for co-extrusion film production. Background Technology

[0002] In the co-extruded film production process, the winding process has a significant impact on product quality. The winding device must ensure that the co-extruded film is wound neatly and with stable tension to avoid wrinkles, stretching deformation, or breakage of the film material. Existing winding devices typically use a structure where a drive motor directly drives the winding shaft to rotate. During the winding process, as the diameter of the film roll gradually increases, the linear velocity of the outermost layer of film material on the winding shaft increases with the diameter, causing the film tension to rise continuously. When the tension exceeds the film material's tolerance limit, film breakage is likely to occur. The tension release at the moment of breakage may cause the film roll to bounce and the equipment to vibrate, posing a safety hazard.

[0003] Some existing devices detect tension and adjust motor speed through an electronic control system. However, the electronic control components are prone to failure in high-dust and high-humidity production environments, resulting in delayed speed regulation response. This makes it impossible to control abnormal tension growth in a timely manner, and the winding shaft speed cannot be adjusted in time with the film roll diameter, which affects product quality and reduces the safety of the winding process. Utility Model Content

[0004] To address the aforementioned problems, the present invention provides a safe winding device for co-extruded film production, which solves the problem of continuously increasing tension and potential film material damage or unstable winding caused by the increase in film roll diameter during the winding process of existing co-extruded films. The device includes a base and two upright plates mounted on the base, with a winding shaft rotatably connected between the two upright plates. One upright plate contains a drive mechanism, which includes a drive motor connected to the base, a vertically arranged drive wheel and a driven wheel. The output shaft of the drive motor is connected to the drive wheel, and the driven wheel is located at the end of the winding shaft. The drive wheel and the driven wheel are connected by a synchronous belt. Below the take-up shaft is a guide rail parallel to it, and an adjusting block is slidably connected to the guide rail. The side of the adjusting block closest to the drive mechanism is rotatably connected to a speed regulating gear, and the other side is provided with a downward inclined guide surface. The guide surface cooperates with the co-extruded film roll on the take-up shaft, and the speed regulating gear cooperates with the drive mechanism to regulate the speed of the driven wheel.

[0005] Preferably, the driven wheel, the speed regulating gear, and the driving wheel are arranged in sequence along the vertical direction and are coaxially arranged.

[0006] Preferably, the speed regulating gear is a bevel gear, with the end of the speed regulating gear near the adjusting block being the large diameter end and the other end being the small diameter end.

[0007] Preferably, the inclination angle of the guide ramp is 30°-45°.

[0008] Preferably, a guiding mechanism for guiding the co-extruded film is provided in front of the take-up shaft. The guiding mechanism includes a guide shaft disposed between two vertical plates. The guide shaft is parallel to the take-up shaft and its height is lower than that of the take-up shaft.

[0009] Preferably, the two upright plates are symmetrically provided with adjustment grooves, the bottom surface of the adjustment grooves is provided with slide rails, and sliders are slidably connected on the slide rails. A guide shaft is connected between the two sliders. The two ends of the sliders are respectively connected to the inner walls of the two sides of the adjustment grooves through elastic connectors.

[0010] Preferably, the surface of the guide roller is covered with a removable cleaning cotton.

[0011] Preferably, limiting baffles are provided at both ends of the outer side of the slider in a vertical direction.

[0012] The beneficial effects of this invention are as follows: This device responds promptly to changes in the diameter of the co-extruded film roll via the guide slope of the adjusting block, automatically adjusting the winding speed. This avoids stretching deformation and damage to the outermost co-extruded film due to excessive tension, reduces problems such as film roll wrinkles and uneven winding, and improves winding quality. It requires no manual intervention, reducing labor intensity and increasing the automation level of co-extruded film production. The overall structure is simple and compact, with few parts, eliminating the need for complex sensors or electronic control systems, reducing the risk of electronic component failure, and lowering production, manufacturing, and maintenance costs. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle.

[0015] Symbols in the diagram: 1. Base; 2. Vertical plate; 3. Rewinding shaft; 4. Drive motor; 5. Driving wheel; 6. Driven wheel; 7. Synchronous belt; 8. Guide rail; 9. Adjusting block; 10. Speed ​​regulating gear; 11. Guide slope; 12. Guide shaft; 13. Adjusting groove; 14. Slide rail; 15. Slider; 16. Elastic connector; 17. Limiting baffle. Detailed Implementation

[0016] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0017] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0018] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0019] The present application provides a description of a safe winding device for co-extruded film production.

[0020] Please see Figure 1 and Figure 2 This is a schematic diagram of the structure of the present invention. The safety winding device for co-extruded film production includes a base 1 and two upright plates 2 mounted on the base 1, with a winding shaft 3 rotatably connected between the two upright plates 2. One upright plate 2 houses a drive mechanism, which includes a drive motor 4 connected to the base 1, a vertically arranged drive wheel 5, and a driven wheel 6. The output shaft of the drive motor 4 is connected to the drive wheel 5, and the driven wheel 6 is located at the end of the winding shaft 3. The drive wheel 5 and the driven wheel 6 are connected by a synchronous belt 7. The drive motor 4 in the drive mechanism drives the driven wheel 6 to rotate via the drive wheel 5 and the synchronous belt 7, thereby driving the winding shaft 3 to rotate and perform the winding operation on the co-extruded film.

[0021] A guide rail 8 parallel to the take-up shaft 3 is provided below it. An adjusting block 9 is slidably connected to the guide rail 8. A speed regulating gear 10 is rotatably connected to the side of the adjusting block 9 closest to the drive mechanism, and a downwardly inclined guide surface 11 is provided on the other side. The guide surface 11 engages with the co-extruded film roll on the take-up shaft 3, and the speed regulating gear 10 engages with the drive mechanism to regulate the speed of the driven wheel 6. As winding proceeds, the diameter of the co-extruded film roll on the take-up shaft 3 gradually increases, and the tension of the outermost co-extruded film continuously increases with the increase in diameter. When the diameter of the film roll increases to the point of contact with the guide surface 11 of the adjusting block 9, the co-extruded film roll applies a force to the guide surface 11. The horizontal component of this force pushes the adjusting block 9 to slide along the guide rail 8 toward the drive mechanism. The adjusting block 9 drives the speed regulating gear to approach and engage with the drive mechanism, thereby reducing the speed of the driven wheel 6 by changing the transmission ratio between the driving wheel 5 and the driven wheel 6, and thus reducing the rotational speed of the take-up shaft 3. This keeps the winding speed of the outermost co-extruded film on the take-up shaft 3 stable, preventing the tension from continuously increasing and achieving safe winding.

[0022] This device responds promptly to changes in the co-extruded film roll diameter via the guide slope 11 of the adjusting block 9, automatically adjusting the winding speed. This prevents the outermost co-extruded film from stretching, deforming, or breaking due to excessive tension, reducing problems such as film roll wrinkles and uneven winding, thus improving winding quality. It requires no manual intervention, reducing labor intensity and increasing the automation level of co-extruded film production. The overall structure is simple and compact, with few parts, eliminating the need for complex sensors or electronic control systems, reducing the risk of electronic component failure, and lowering manufacturing and maintenance costs.

[0023] Furthermore, the driven wheel 6, the speed regulating gear 10, and the driving wheel 5 are arranged in sequence along the vertical direction and are coaxially set. When the speed regulating gear 10 slides, it can accurately fit the synchronous belt 7 and form a stable transmission cooperation with the driving wheel 5 and the driven wheel 6.

[0024] Furthermore, the speed regulating gear 10 is a bevel gear, with the end of the speed regulating gear 10 closest to the adjusting block 9 being the large-diameter end and the other end being the small-diameter end. As the adjusting block 9 slides, different diameter sections of the bevel gear gradually engage with the synchronous belt 7, adjusting the transmission ratio by changing the contact radius in real time, thus achieving continuous and smooth adjustment of the winding speed. When the large-diameter end contacts the synchronous belt 7 first, the speed adjustment amplitude is more gentle, avoiding sudden tension changes and improving winding stability.

[0025] Specifically, at the beginning of winding, the diameter of the co-extruded film roll on the winding shaft 3 is small, the adjusting block 9 is in the initial position, the speed regulating gear 10 is not in contact with the synchronous belt 7, and the winding shaft 3 winds at the initial speed. As winding continues, the diameter of the co-extruded film roll gradually increases, and the tension of the outermost film layer continuously rises. When the diameter of the co-extruded film roll increases to the point of contacting the guide slope 11 of the adjusting block 9, the force of the co-extruded film roll on the guide slope 11 pushes the adjusting block 9 to slide along the guide rail 8 toward the drive mechanism, causing the speed regulating gear 10 to gradually approach the synchronous belt 7. The small-diameter end of the speed regulating gear 10 first contacts the synchronous belt 7, and the contact diameter gradually increases. The transmission radius of the synchronous belt 7 at the speed regulating gear 10 gradually increases, and the speed of the driven wheel 6 gradually decreases as the contact diameter increases, until the winding speed of the outermost co-extruded film on the winding shaft 3 stabilizes and the tension no longer increases.

[0026] Preferably, the inclination angle of the guide slope 11 is 30°-45°. This angle range makes the thrust on the adjusting block 9 more balanced when the diameter of the co-extruded film roll increases, ensuring the smoothness during speed adjustment.

[0027] In one embodiment, a guiding mechanism for guiding the co-extruded film is provided in front of the take-up shaft 3. The guiding mechanism includes a guide shaft 12 disposed between two upright plates 2. The guide shaft 12 is parallel to the take-up shaft 3 and its height is lower than that of the take-up shaft 3. The guide shaft 12 is used to pre-guide and flatten the co-extruded film entering the take-up shaft 3 and correct film misalignment.

[0028] Furthermore, two upright plates 2 are symmetrically provided with adjustment grooves 13, and the bottom surface of the adjustment grooves 13 is provided with slide rails 14. Slider blocks 15 are slidably connected to the slide rails 14, and guide shafts 12 are connected between the two sliders 15. The two ends of the sliders 15 are respectively connected to the inner walls of the two sides of the adjustment grooves 13 through elastic connectors 16. Specifically, when the tension of the co-extruded film fluctuates, the guide shaft 12 is pushed, which drives the sliders 15 to slide along the slide rails 14, and the elastic connectors 16 extend and retract to buffer the tension. After the tension stabilizes, the elastic connectors reset, which drives the sliders 15 and the guide shafts 12 back to the center position, reducing the damage to the film material caused by sudden tension changes and ensuring smooth and stable winding.

[0029] Furthermore, the guide roller surface is wrapped with removable cleaning cotton to remove surface dust and impurities as the co-extruded film passes through, preventing contaminants from being rolled up and affecting the quality of the film.

[0030] Furthermore, limit baffles 17 are provided at both ends of the outer side of the slider 15 in a vertical direction to prevent the co-extruded film from shifting due to axial movement of the guide shaft 12.

[0031] The working process of this utility model is as follows: During operation, the drive motor 4 drives the driven wheel 6 and the winding shaft 3 to rotate and wind up the co-extruded film through the drive wheel 5 and the synchronous belt 7. After being guided and cleaned by the guide shaft 12, the co-extruded film enters the winding process. As the film is continuously wound up, the diameter of the co-extruded film roll increases, which pushes the adjusting block 9 to slide. The speed regulating gear 10 gradually intervenes in the synchronous belt 7 transmission to reduce the winding speed and achieve stable winding.

[0032] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A safety winding device for co-extruded film production, comprising a base and two upright plates disposed on the base, wherein a winding shaft is rotatably connected between the two upright plates; characterized in that: The upright plate is provided with a driving mechanism, which includes a drive motor connected to the base, a vertically arranged drive wheel and a driven wheel, the output shaft of the drive motor is connected to the drive wheel, the driven wheel is located at the end of the take-up shaft, and the drive wheel and the driven wheel are connected by a synchronous belt. Below the take-up shaft, there is a guide rail parallel to it. An adjusting block is slidably connected to the guide rail. A speed regulating gear is rotatably connected to the side of the adjusting block near the drive mechanism, and a downward inclined guide surface is provided on the other side. The guide surface cooperates with the co-extruded film roll on the take-up shaft. The speed regulating gear cooperates with the drive mechanism to regulate the speed of the driven wheel.

2. The safety winding device for co-extruded film production as described in claim 1, characterized in that: The driven wheel, the speed regulating gear, and the driving wheel are arranged in sequence along the vertical direction and are coaxially configured.

3. The safety winding device for co-extruded film production as described in claim 2, characterized in that: The speed regulating gear is a bevel gear, with one end of the speed regulating gear near the adjusting block being the large diameter end and the other end being the small diameter end.

4. The safety winding device for co-extruded film production as described in claim 3, characterized in that: The inclination angle of the guide ramp is 30°-45°.

5. A safety winding device for co-extruded film production as described in claim 1, characterized in that: A guide mechanism for guiding the co-extruded film is provided in front of the take-up shaft. The guide mechanism includes a guide shaft disposed between the two upright plates. The guide shaft is arranged parallel to the take-up shaft, and its height is lower than that of the take-up shaft.

6. A safety winding device for co-extruded film production as described in claim 5, characterized in that: The two upright plates are symmetrically provided with adjustment grooves, the bottom surface of the adjustment groove is provided with a slide rail, a slider is slidably connected on the slide rail, and the guide shaft is connected between the two sliders; the two ends of the slider are respectively connected to the inner walls of the two sides of the adjustment groove through elastic connectors.

7. A safety winding device for co-extruded film production as described in claim 5, characterized in that: The surface of the guide shaft is covered with a removable cleaning cotton.

8. A safety winding device for co-extruded film production as described in claim 6, characterized in that: Limiting baffles are provided at both ends of the outer side of the slider, extending vertically.

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