Thin film conveying system capable of inhibiting slipping

Abstract

The utility model discloses a thin film conveying system capable of restraining slipping. The thin film conveying system comprises a conveying roller and a wind shielding piece. The thin film is wound on part of the periphery of the conveying roller and comprises a front section to be in contact with the conveying roller and a rear section away from the conveying roller; the air blocking pieces are arranged on the inner side of the front section at intervals and spaced from the conveying rollers. The wind shielding piece comprises a first wind shielding face, the first wind shielding face is intercepted in the direction of airflow generated in the front-section advancing process, and the first wind shielding face at least extends to the two sides of the width of the thin film. The utility model provides a thin film conveying system capable of inhibiting slipping. Wind shielding pieces are arranged on the inner side of a front section at intervals, and the wind shielding pieces and conveying rollers are arranged at intervals. The first air blocking face is intercepted in the direction of airflow generated in the front-section advancing process, the air blocking face at least extends to the two sides of the width of the film, the air blocking face can block the air entrainment phenomenon caused by film movement, the purpose of reducing air interlayers is achieved, the follow-up performance of the driven roller and the traction capacity of the driving roller are improved, and therefore the film conveying slipping phenomenon is relieved.

Description

Technical Field

[0001] The utility model relates to the technical field of film preparation equipment, and more specifically, to a film transmission system capable of suppressing slippage. Background Art

[0002] With the development of new materials and electronic technology, the demand for films has increased, and the industry has increasingly demanded faster production speeds for equipment. As an important component of a film production line, rollers are responsible for supporting, guiding and pulling films. The followability of driven rollers and the pulling capacity of active rollers are both important performance indicators of the equipment.

[0003] Rollers have been widely used as an indispensable structure in film transmission systems. Rollers are divided into active rollers and driven rollers. The active roller is driven by a separate motor, which can apply tension to the film and change the film properties, and play a pulling role on the film; the driven roller refers to the guide roller in the equipment, which is a follower component. It is driven by the friction between the film and the guide roller surface to rotate, and plays the role of introducing, changing the direction of film movement and supporting the moving film. The followability of the driven roller is an important indicator of its performance. If the followability is poor, the film cannot smoothly drive the driven roller to rotate, and the driven roller and the film will have a speed difference; at the same time, the traction ability of the active roller on the film is an important indicator of the performance of the active roller. Poor traction ability will also cause a speed difference between the active roller and the film; the speed difference between the film and the roller is an important factor causing unstable phenomena such as scratches, wrinkles and offsets on the film. In the process of film processing, the movement of the film and the rotation of the roller will cause viscous air to flow and produce air entrainment. The entrained air causes the film to "drift" during the process of pulling the driven roller and the active roller pulling the film. This phenomenon is called slipping in the industry. Therefore, improving the follow-up performance of the driven roller and the traction capacity of the active roller, and then improving the slipping phenomenon, directly affects the quality of the film product.

[0004] The traditional driven roller structure only considers relevant parameters such as the wrap angle and the surface friction coefficient, and improves its follow-up performance by improving these two parameters. However, the movement of the film itself will cause air entrainment. Studies have shown that the amount of air entrainment will increase significantly when the roller speed increases and the film speed increases. The entrained air will cause the guide roller's follow-up performance to decrease, and the traction performance of the traction roller will also decrease. Both situations will cause relative sliding between the film and the roller, which will cause a series of problems such as film wrinkles, seriously affecting the processing quality and production efficiency of film products.

[0005] Therefore, how to provide a film transmission system that reduces the influence of entrained air on the follow-up performance of the guide roller has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0006] The utility model aims to provide a film transmission system which can reduce the influence of entrained air on the follow-up performance of a guide roller.

[0007] The utility model provides a film transmission system for suppressing slippage, comprising a conveying roller and a wind shield;

[0008] The film is wound around a portion of the outer circumference of the conveying roller, including a front section to be in contact with the conveying roller and a rear section away from the conveying roller;

[0009] The windshield is spaced inside the front section and spaced from the conveying roller; the windshield includes a first windshield surface, which intercepts the airflow direction generated during the forward movement of the front section and extends to at least both sides of the width of the film.

[0010] Optionally, the windshield member includes a second windshield surface, which is located on the side of the windshield member facing away from the film, intercepts the airflow direction generated during the rotation of the conveying roller, and extends to at least both sides of the width of the film.

[0011] Optionally, the windshield member further includes a windshield arc surface close to one side of the conveying roller, the windshield arc surface faces the outer circumference of the conveying roller and is spaced apart therefrom, and a first air inlet groove is recessed toward the inner side of the windshield member by the windshield arc surface.

[0012] Optionally, the first air inlet groove extends from the wind shielding arc surface toward the inside of the wind shielding member along the direction of airflow generated during the rotation of the conveying roller.

[0013] Optionally, the windshield member includes a third windshield surface, which is located on the side of the windshield member facing the film, parallel to the plane where the film is located, and has a second air inlet groove that is recessed toward the inner side of the windshield member and extends toward the moving direction of the film.

[0014] Optionally, the cross-sectional area of ​​the first air inlet groove gradually increases from the outside to the inside;

[0015] And / or, the cross-sectional area of ​​the second air inlet groove gradually increases from the outside to the inside.

[0016] Optionally, the bottom surface of the first air inlet groove is a curved surface;

[0017] And / or, the bottom surface of the second air inlet groove is a curved surface.

[0018] Optionally, the first air inlet grooves extend at least to both sides of the width of the film, and a plurality of first air inlet grooves are sequentially surrounded by the outer circumference of the conveying roller;

[0019] And / or, the second air inlet grooves extend at least to both sides of the width of the film, and a plurality of second air inlet grooves are arranged in sequence along the moving direction of the film.

[0020] Optionally, the windshield member includes a windshield module that is spliced ​​together in sequence, and a first air inlet groove and a second air inlet groove are formed on the windshield module.

[0021] Optionally, a wind pressure sensor is provided at the contact entrance between the film and the conveying roller.

[0022] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0023] The film transmission system for suppressing slipping provided by the utility model comprises a conveying roller and a windshield; the windshield is arranged at an interval on the inner side of the front section and is arranged at an interval with the conveying roller; the windshield comprises a first windshield surface, the first windshield surface intercepts the direction of the airflow generated in the process of the front section moving forward, and the windshield surface extends to at least both sides of the width of the film, the windshield surface can block the air entrainment phenomenon caused by the movement of the film, achieve the purpose of reducing air interlayers, improve the follow-up performance of the driven roller and the traction capacity of the active roller, thereby reducing the slipping phenomenon of the film transmission.

[0024] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0026] Figure 1 It is a schematic diagram of air entrainment formation of the utility model.

[0027] Figure 2 This is a schematic diagram of the windshield structure of the first structure of the utility model.

[0028] Figure 3 This is a schematic diagram of the windshield structure of the second structure of the utility model.

[0029] Figure 4 It is a partial enlarged schematic diagram of the wind shield member of the second structure of the utility model.

[0030] Explanation of the reference numerals: 1. film; 2. conveying roller; 3. wind shield; 31. first wind shield surface; 32. second wind shield surface; 33. third wind shield surface; 331. second air inlet groove; 34. wind shield arc surface; 341. first air inlet groove. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0032] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0033] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0034] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0035] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0036] See also Figure 1 The existing film transmission system includes a conveying roller 2 and a film 1. The film 1 is wrapped around a part of the outer circumference of the conveying roller 2. During the conveying process of the film 1, an air cushion is generated between the film 1 and the conveying roller 2 due to the air entrainment phenomenon. The air cushion greatly reduces the friction coefficient between the film 1 and the roller, thereby reducing the traction ability (friction force) of the film 1 on the conveying roller 2 (driven roller) and the traction ability (friction force) of the conveying roller 2 (active roller) on the film 1. As a result, slippage occurs, affecting product quality.

[0037] The utility model discloses a film transmission system for preventing slippage, comprising a conveying roller 2 and a windshield 3; a film 1 is wound around a part of the outer periphery of the conveying roller 2, comprising a front section to be in contact with the conveying roller 2 and a rear section to be away from the conveying roller 2; Figure 2The windshield 3 of the utility model includes two structures. In the first structure, the windshield 3 includes a first windshield and a second windshield, wherein the first windshield is spaced apart on the inner side of the front section and spaced apart from the conveying roller 2, the first windshield is perpendicular to the inner surface of the film 1, and the surface of the first windshield facing away from the conveying roller 2 is a first windshield surface 31, the first windshield surface 31 intercepts the airflow direction generated during the forward movement of the front section, and the first windshield surface 31 at least extends to both sides of the width of the film 1. The second windshield is located on the inner side of the film 1 and is parallel to the film 1, the first windshield is located between the film 1 and the second windshield, the second windshield includes a second windshield surface 32, the second windshield surface 32 is located on the side of the second windshield facing away from the film 1, the second windshield surface 32 intercepts the airflow direction generated during the rotation of the conveying roller 2, and the second windshield surface 32 extends at least to both sides of the width of the film 1. In the first structure, the first windshield and the second windshield are arranged according to the traveling direction of the film 1 and the rotating direction of the conveying roller 2, that is, the air flow direction. The first windshield and the second windshield are as close to the film 1 and the conveying roller 2 as possible without contacting the film 1 and the conveying roller 2, and the air entrainment phenomenon is prevented by the windshield. It can be seen that the first windshield surface 31 can block the air entrainment phenomenon caused by the movement of the film 1 from the source, and the second windshield surface 32 can block the air entrainment phenomenon caused by the rotation of the roller from the source.

[0038] Combination Figure 3 In the second structure, the windshield 3 is an integrated structure, including a first windshield surface 31, a second windshield surface 32, a third windshield surface 33 and a windshield arc surface 34 located on its four circumferential sides. The windshield 3 is arranged at intervals on the inner side of the front section and is arranged at intervals from the conveying roller 2; the first windshield surface 31 intercepts the direction of the airflow generated during the forward movement of the front section, and the first windshield surface 31 at least extends to both sides of the width of the film 1. The second windshield surface 32 is located on the side of the windshield 3 facing away from the film 1, and the second windshield surface 32 intercepts the direction of the airflow generated during the rotation of the conveying roller 2, and the second windshield surface 32 extends at least to both sides of the width of the film 1. The windshield arc surface 34 is located on the side of the windshield 3 close to the conveying roller 2, and the windshield arc surface 34 faces and is arranged at intervals on the outer periphery of the conveying roller 2, and the windshield arc surface 34 is recessed with a first air inlet groove 341 toward the inner side of the windshield 3. The first air inlet groove 341 extends from the wind shield arc surface 34 to the inside of the wind shield 3 along the direction of the airflow generated during the rotation of the conveying roller 2. The cross-sectional area of ​​the first air inlet groove 341 gradually increases from the outside to the inside. The bottom surface of the first air inlet groove 341 is an arc surface. The first air inlet groove 341 at least extends to both sides of the width of the film 1. Multiple first air inlet grooves 341 surround the outer periphery of the conveying roller 2 in sequence. The third wind shield surface 33 is located on the side of the wind shield 3 facing the film 1. The third wind shield surface 33 is parallel to the plane where the film 1 is located. Figure 4The third windshield surface 33 is provided with a second air inlet groove 331 which is recessed toward the inner side of the windshield member 3 and extends toward the traveling direction of the film 1. The cross-sectional area of ​​the second air inlet groove 331 gradually increases from the outside to the inside, and the bottom surface of the second air inlet groove 331 is an arc surface. The second air inlet groove 331 extends at least to both sides of the width of the film 1, and a plurality of second air inlet grooves 331 are arranged in sequence along the traveling direction of the film 1. Due to the pressure difference caused by the rotation of the conveying roller 2 and the traveling of the film 1, the air flows along the rotation direction of the conveying roller 2 and the traveling direction of the film 1. When the outside air is pushed toward the contact entrance of the film 1 and the conveying roller 2 by the pressure difference, the first windshield surface 31 and the second windshield surface 32 isolate and intercept most of the air, and the remaining air enters the contact entrance of the film 1 and the conveying roller 2 through the gap between the third windshield surface 33 and the film 1 and the gap between the windshield arc surface 34 and the conveying roller 2. At this time, due to the setting of the first air inlet groove 341 and the second air inlet groove 331, the flowing air will flow along the first inlet of the air duct entrance. The wind groove 341 and the second air inlet groove 331, and the wind flow in the opposite direction formed by rebounding in the first air inlet groove 341 and the second air inlet groove 331 offsets the wind flow in the inlet direction, that is, a pressure opposite to the inlet direction is formed at each air duct outlet of the first air inlet groove 341 and the second air inlet groove 331, so that the air pressure is weakened one by one, and finally the pressure at the end position (the position close to the inlet where the film 1 and the conveying roller 2 contact) is basically reduced to atmospheric pressure. At this time, the amount of air interlayer is reduced, the follow-up performance of the driven roller and the traction capacity of the active roller are improved, and the slippage phenomenon is alleviated.

[0039] Furthermore, in some embodiments, the windshield member 3 includes windshield modules that are sequentially spliced, and the windshield modules are provided with first air inlet grooves 341 and second air inlet grooves 331. This structure can be installed or disassembled in groups according to the number of air ducts of the first air inlet grooves 341 and the second air inlet grooves 331, so as to facilitate the handling of air entrainment degrees at different speeds of the system.

[0040] Furthermore, in some embodiments, a wind pressure sensor is provided at the contact entrance between the film 1 and the conveying roller 2 to measure the air pressure, and the number of the first air inlet grooves 341 and the second air inlet grooves 331 is adjusted according to the feedback of the pressure value, thereby forming a simple closed-loop control.

[0041] In summary, the two structural forms of the windshield 3 of the film transmission system that suppresses slippage provided by the utility model can solve the problem of air entrainment from the source, among which the first structure is simple and can improve the roller slippage from the source at a very low cost, and has high practicality. The second structure does not require any external drive device. According to the actual production speed and the slippage situation, the number of air ducts can be reasonably set so that the pressure is eventually weakened to atmospheric pressure, thereby solving the fundamental problem and consuming no energy. Although some specific embodiments of the utility model have been described in detail through examples, those skilled in the art should understand that the above examples are for illustration only and are not intended to limit the scope of the utility model. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims

1. A film transmission system for suppressing slippage, used for suppressing slippage during film transmission, characterized in that: include: Conveyor rollers and wind deflectors; The film is wound around a portion of the outer circumference of the conveying roller, including a front section to be in contact with the conveying roller and a rear section away from the conveying roller; The wind shield is spaced apart on the inner side of the front section and spaced apart from the conveying roller; the wind shield includes a first wind shield surface, which intercepts the direction of the airflow generated during the forward movement of the front section, and the first wind shield surface at least extends to both sides of the width of the film.

2. The film transmission system for suppressing slippage according to claim 1, characterized in that: The windshield member includes a second windshield surface, which is located on the side of the windshield member facing away from the film. The second windshield surface intercepts the airflow direction generated during the rotation of the conveying roller, and the second windshield surface at least extends to both sides of the width of the film.

3. The film transmission system for suppressing slippage according to claim 1 or 2, characterized in that: The windshield member further comprises a windshield arc surface close to one side of the conveying roller, the windshield arc surface faces the outer circumference of the conveying roller and is spaced apart therefrom, and the windshield arc surface is recessed with a first air inlet groove toward the inner side of the windshield member.

4. The film transmission system for suppressing slippage according to claim 3, characterized in that: The first air inlet groove extends from the wind shielding arc surface toward the inner side of the wind shielding member along the direction of the airflow generated during the rotation of the conveying roller.

5. The film transmission system for suppressing slippage according to claim 3, characterized in that: The windshield member includes a third windshield surface, which is located on the side of the windshield member facing the film, parallel to the plane where the film is located, and has a second air inlet groove that is recessed toward the inner side of the windshield member and extends toward the moving direction of the film.

6. The film transmission system for suppressing slippage according to claim 5, characterized in that: The cross-sectional area of ​​the first air inlet groove gradually increases from the outside to the inside; And / or, the cross-sectional area of ​​the second air inlet groove gradually increases from the outside to the inside.

7. The film transmission system for suppressing slippage according to claim 5, characterized in that: The bottom surface of the first air inlet groove is a curved surface; And / or, the bottom surface of the second air inlet groove is a curved surface.

8. The film transmission system for suppressing slippage according to claim 7, characterized in that: The first air inlet grooves extend at least to both sides of the width of the film, and a plurality of the first air inlet grooves surround the outer circumference of the conveying roller in sequence; And / or, the second air inlet groove at least extends to both sides of the width of the film, and a plurality of the second air inlet grooves are arranged in sequence along the moving direction of the film.

9. The film transmission system for suppressing slippage according to claim 5, characterized in that: The wind shield member includes a wind shield module that is sequentially spliced ​​together, and the wind shield module is provided with the first air inlet groove and the second air inlet groove.

10. The film transmission system for suppressing slippage according to claim 1 or 2, characterized in that: A wind pressure sensor is arranged at the contact entrance between the film and the conveying roller.

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