A tension adjustment assembly for a film

Abstract

The utility model discloses a kind of tension adjusting assembly of film, and its technical solution main points include rack and several buffer rollers, each buffer roller is rotatably installed in rack, and each buffer roller is horizontally equidistant parallel distribution;Buffer area is arranged between two buffer rollers, buffer roller is used for film to bypass, film bypasss from the upside of each buffer roller, and forms the buffer section of sag between adjacent two buffer rollers;Limiting mechanism is installed between adjacent buffer rollers, limiting mechanism includes flexible belt-shaped limiting piece, left and right ends of limiting piece are supported by support, and middle section forms the limiting portion of downward arc-shaped bulge by downward overhang;The buffer section of film bypasss from the downside of limiting portion of limiting piece.The utility model has the effect of supporting slack film, buffering and limiting film tension.

Description

Technical Field

[0001] This utility model relates to the field of thin film production equipment, and more specifically, to a tension adjustment component for thin films. Background Technology

[0002] In the film manufacturing industry, films must undergo an aging process after manufacturing before they can be wound up. Under stable operating conditions, the winding equipment maintains a constant speed, the film acceleration is zero, and it is in a naturally stretched state. At this time, the tension is stable and will not adversely affect the film performance.

[0003] However, the uniform speed of the film is disrupted when equipment malfunctions and shutdowns occur, or when the take-up roller needs to be replaced, due to unsteady conditions. Specifically, during deceleration, the film continues to be conveyed due to inertia, making it prone to accumulation and compression in the buffer area or between equipment, resulting in surface scratches and severely affecting product appearance and quality. Conversely, during restart and acceleration, the film is instantly stretched, subjected to excessive tensile stress. The system lacks a key component that can dynamically respond and provide flexible limits, making it unable to effectively buffer and constrain sudden tension, causing irreversible plastic deformation of the film due to excessive stretching during acceleration.

[0004] Therefore, a new solution is needed to address this problem. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a tension adjustment component for a thin film, which has the effects of supporting a relaxed thin film, buffering and limiting the tension of the thin film.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a tension adjustment assembly for a film, comprising a frame and several buffer rollers, each buffer roller being rotatably mounted on the frame and arranged horizontally at equal intervals; a buffer area is provided between two buffer rollers, the buffer rollers being used for film to pass over, the film passing over the upper side of each buffer roller, forming a drooping buffer section between two adjacent buffer rollers; a limiting mechanism is installed between adjacent buffer rollers, the limiting mechanism comprising a flexible strip-shaped limiting member, the left and right ends of the limiting member being supported by support rollers, the middle section hanging downwards to form a downwardly arc-shaped limiting part; the buffer section of the film passes over the lower side of the limiting part of the limiting member.

[0007] By adopting the above solution, and by setting a limiting mechanism composed of flexible strip-shaped limiting members in the buffer area between the two buffer rollers, the problem of film stretching deformation caused by sudden tension changes in traditional film storage devices under dynamic operating conditions is effectively solved.

[0008] The present invention is further configured such that the limiting member is a flexible strip-shaped plastic sheet.

[0009] By adopting the above solution and designing the limiting member as a flexible strip-shaped plastic sheet, the tension adjustment component achieves structural and performance optimization. This plastic sheet possesses excellent flexibility and moderate rigidity, enabling it to flexibly wrap and support the dynamic undulations of the film buffer section while maintaining a stable arc-shaped limiting part shape, providing continuous and effective cushioning and constraint.

[0010] The present invention is further configured such that a plurality of counterweights are integrally connected to the arc-shaped inner side of the limiting part; the counterweights are strip-shaped structures along the width direction and are bonded to the surface of the limiting part.

[0011] By adopting the above solution, the counterweight is firmly bonded to the limiting part through adhesive bonding, effectively increasing the downward force of the limiting part and enabling it to more sensitively sense minute changes in film tension. When the film is relaxed, the additional gravity provided by the counterweight can enhance the supporting effect of the limiting part on the film, preventing excessive sagging and accumulation of the film; when the film is tensioned, the counterweight can suppress the excessive upward movement of the limiting part through inertia, thereby buffering instantaneous tension and preventing excessive stretching of the film.

[0012] The present invention is further configured such that the counterweight includes a plurality of load-bearing strips, the cross-section of the load-bearing strips is an isosceles trapezoid, the longer bottom of the load-bearing strips is connected to the limiting part; the trapezoidal inclined surface of the load-bearing strips forms an abutting part; the abutting parts of adjacent load-bearing strips press against each other to limit the arcuate contour of the limiting part.

[0013] By adopting the above scheme, a stable and adaptive limiting profile maintenance mechanism is constructed by designing the load-bearing strip with an isosceles trapezoidal cross-section and connecting it to the limiting part through a long bottom. Adjacent load-bearing strips are tightly pressed against each other through the abutment part formed by the trapezoidal inclined surface, forming a continuous and stable support surface inside the limiting part. This effectively maintains the downward arc profile required by the limiting part and prevents shape distortion caused by changes in membrane tension or its own weight.

[0014] The present invention is further configured such that the end of the limiting member is fixedly connected to the outer periphery of the support roller, and is wound around the support roller at least once, and the middle section of the limiting member extends downward from the middle of the two support rollers.

[0015] By adopting the above solution, the end of the limiting member is directly fixed and wrapped around the outer periphery of the buffer roller, so that the limiting member can rotate synchronously with the buffer roller. This not only avoids the relative sliding friction between the limiting member and the roller surface and extends the service life, but also ensures that the middle section of the limiting member can always stably extend downward from between the two support rollers to form a durable and shape-controllable arc-shaped limiting part.

[0016] The present invention is further configured such that the limiting part has an outer edge on the side facing the buffer section, and the buffer section has an inner surface of the buffer film on the side near the limiting part, and the outer edge of the limiting part and the inner surface of the buffer film form a partial contact in the buffer area.

[0017] By adopting the above scheme, and by making the outer edge of the limiting part partially abut against the inner surface of the buffer film within the buffer area, the limiting part can effectively constrain the swing range of the buffer segment without completely binding the film. The partial abutment method avoids excessive pressure on the film surface that may be caused by surface contact, and also senses and buffers the tension fluctuations of the film in real time through continuous flexible contact.

[0018] The present invention is further configured such that a fixed shaft is provided at the middle position of adjacent buffer rollers, the fixed shaft is fixedly connected to the frame, the middle section of the limiting member extends upward and is connected to the fixed shaft, and the limiting member forms two sets of limiting parts on both sides of the fixed shaft.

[0019] By adopting the above scheme, by setting a fixed shaft in the middle of adjacent buffer rollers and extending the middle section of the limiting member upward to connect with it, a single limiting member can hang down naturally on both sides of the fixed shaft, forming two sets of independent and symmetrical limiting parts, thereby realizing simultaneous and zoned control of two adjacent buffer sections.

[0020] The present invention is further configured such that the counterweight is made of nylon material.

[0021] By adopting the above solution and using nylon material to manufacture the counterweight, the overall performance of the tension adjustment component is improved. It can provide the stable inertial force required for the counterweight and withstand the internal stress generated by the long-term dynamic deformation of the limiting part.

[0022] The present invention is further configured such that the limiting member is made of TPU plastic.

[0023] By adopting the above solution and using TPU plastic to manufacture the limiting component, a comprehensive optimization of the tension adjustment assembly in terms of flexibility, durability, and protective performance is achieved. TPU material combines resilience, abrasion resistance, and tear strength, enabling the limiting component to rapidly deform and return to its original shape in response to frequent dynamic changes in film tension, effectively buffering impacts and suppressing vibrations, while also withstanding friction and bending losses during long-term operation. Its smooth and flexible surface provides ample cushioning protection when in contact with the film, avoiding the risk of scratches or indentations.

[0024] In summary, this utility model has the following beneficial effects:

[0025] 1. By setting a limiting mechanism composed of flexible strip-shaped limiting elements in the buffer area between the two buffer rollers, the problem of film stretching deformation caused by sudden tension changes during dynamic working conditions such as start-up, shutdown, and roll changing is overcome.

[0026] 2. The arc-shaped limiting part formed by the downward hanging of the middle of the limiting part can support and flexibly constrain the buffer section of the film from below. It provides buffer space for the film to relax during deceleration, and can also buffer and limit the excessive upward movement and tension of the film through its own deformation and the synergistic effect of the counterweight during acceleration. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of a tension adjustment assembly for a thin film in the first state according to Embodiment 1.

[0028] Figure 2 This is a cross-sectional view of a tension adjustment assembly for a thin film in the second state of this embodiment.

[0029] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0030] Figure 4 This is a schematic diagram showing the load-bearing strips of the counterweight fully fitting together.

[0031] Figure 5 This is a perspective view of a tension adjustment component for a thin film in this second embodiment;

[0032] Figure 6 This is a cross-sectional view of a tension adjustment component for a thin film in this second embodiment;

[0033] Reference numerals: 1. Frame; 2. Buffer roller; 3. Support roller; 4. Fixed shaft; 5. Limiting element; 51. Limiting part; 52. Outer edge of limiting part; 6. Film; 61. Buffer section; 611. Inner surface of buffer film; 7. Buffer area; 8. Counterweight; 81. Load-bearing bar; 82. Abutment part. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Example 1

[0036] This embodiment discloses a tension adjustment component for a thin film, referring to... Figures 1-4As shown, the device includes a frame 1 and several buffer rollers 2. Each buffer roller 2 is rotatably mounted on the frame 1 and located at the upper middle position on the surface of the longitudinal support plate of the frame 1. The buffer rollers 2 are horizontally equidistant and parallel. The film 6 passes around the upper side of each buffer roller 2 in a serpentine path, forming a drooping buffer section 61 between two adjacent buffer rollers 2. A buffer area 7 is provided between two buffer rollers 2 to accommodate the drooping buffer section 61 of the film.

[0037] Reference Figure 1 , Figure 2 As shown, a limiting mechanism is installed between each adjacent buffer roller 2. The limiting mechanism includes a flexible strip-shaped limiting member 5 made of TPU plastic. The limiting member 5 is a flexible strip-shaped plastic sheet. The TPU plastic material gives the limiting member 5 the required excellent flexibility and elasticity, so that the limiting member 5 can not only fit tightly against the drooping buffer section 61, but also adapt to its dynamic undulations, thereby achieving dynamic, gentle, non-contact buffering and limiting. The left and right ends of the limiting member 5 are supported by the support roller 3, and the middle section hangs down naturally to form a downwardly arc-shaped limiting part 51.

[0038] Reference Figure 2 As shown, the buffer section 61 of the film 6 passes under the limiting part 51 of the limiting member 5. The end of the limiting member 5 is fixedly connected to the outer periphery of the support roller 3 and is wound around the support roller 3 at least once. The middle section of the limiting member 5 extends downward from between the two support rollers 3. The length of the limiting member 5 in the vertical direction can also be adjusted by manually driving the support roller 3 to accommodate the buffer section 61 of the film 6 sagging under different process requirements.

[0039] The limiting part 51 has an outer edge 52 facing the buffer section 61, and the corresponding buffer section 61 has an inner surface 611 of the buffer film on the side close to the limiting part 51. The outer edge 52 of the limiting part and the inner surface 611 of the buffer film form a partial contact in the buffer area 7.

[0040] When the tension of the film 6 increases, causing the buffer section 61 to move upward, the outer edge 52 of the limiting part and the inner surface 611 of the buffer film remain in partial contact. The limiting part 51 will move upward with the buffer section 61, and the two sides of the entire limiting member 5 will be raised in an arc shape, forming a larger upward open arc structure, realizing the adaptive adjustment of tension.

[0041] Reference Figure 3As shown, a plurality of counterweights 8 are integrally connected to the arc-shaped inner side of the limiting part 51; the counterweights 8 are made of nylon material. The counterweights 8 are strip-shaped structures along the width direction, including a plurality of load-bearing strips 81; the cross-section of the load-bearing strips 81 is an isosceles trapezoid, and they are bonded to the surface of the limiting part 51. The longer bottom of the load-bearing strips 81 is integrally connected to the limiting part 51, and the trapezoidal inclined surface of the load-bearing strips 81 forms an abutment part 82. The counterweights 8 are arc-shaped plate-shaped structures adapted to the arc portion, which can support and press against the limiting part 5 from above, thereby enhancing the contact and constraint effect of the limiting part 5 on the drooping buffer section 61.

[0042] Reference Figure 4 As shown, when the limiting member 5 is not subjected to upward pressure and hangs completely, the abutting parts 82 of the adjacent load-bearing bars 81 press against each other to form a stable interlocking structure, which effectively restricts the arc-shaped profile of the limiting part 51 and ensures that it maintains an ideal state under static conditions, providing a reliable tension adjustment guarantee for the operation of the film.

[0043] Example 2

[0044] This embodiment discloses a tension adjustment component for a thin film, which is based on Embodiment 1 and further refers to... Figures 5-6 Please provide a detailed explanation.

[0045] In this embodiment, a fixed shaft 4 is added at the middle position of two adjacent buffer rollers 2. The fixed shaft 4 is fixedly connected to the frame 1 by fasteners and is located at the lower middle part of the vertical direction of the two buffer rollers 2. The limiting member 5 adopts a wraparound layout design. The middle section of the limiting member 5 extends upward and connects to the fixed shaft 4. The limiting member 5 passes around the support roller 3 on one side, the fixed shaft 4 and the support roller 3 on the other side in sequence to form a W-shaped structure. Then, two sets of independently working limiting parts 51 are formed on both sides of the fixed shaft 4. The bottom ends of the two sets of limiting parts 51 partially contact the arc-shaped bottom end of the buffer section 61 and apply a dynamically adjustable flexible constraint force.

[0046] The two limiting sections 51 can independently respond to the tension changes of the corresponding downward-sloping buffer section 61. When uneven film tension occurs on both sides during production line operation, the bottom ends of the two limiting sections 51 will move asynchronously accordingly, thereby forming a dynamic height difference. The adjusting torque generated by this height difference causes the system to automatically tend towards and maintain tension balance.

[0047] The sheet of the limiting member 5 is fixed to the connection between it and the fixed shaft 4. When the two limiting parts 51 form a height difference due to tension difference, the two sides of the limiting member 5 on the fixed shaft 4 can adaptively adjust, effectively maintaining and coordinating the tension balance between the two limiting parts 51.

[0048] Compared to traditional structures, this embodiment separates the two limiting sections 51 by fixing the shaft 4, forming a structure with limiting at both ends side by side, which can effectively limit and buffer the film. Especially when dealing with wide films or under off-center loading conditions, this structure can effectively suppress film deviation, reduce surface wrinkles, and ensure that the system maintains stable tension control performance under various operating conditions.

[0049] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A tension adjustment component for a thin film, characterized in that, It includes a frame (1) and several buffer rollers (2), each buffer roller (2) is rotatably mounted on the frame (1), and each buffer roller (2) is horizontally equidistantly parallel; a buffer area (7) is provided between two buffer rollers (2), the buffer rollers (2) are used for the film (6) to pass around, the film (6) passes around from the upper side of each buffer roller (2), forming a drooping buffer section (61) between two adjacent buffer rollers (2); A limiting mechanism is installed between adjacent buffer rollers (2). The limiting mechanism includes a flexible strip-shaped limiting member (5). The left and right ends of the limiting member (5) are supported by a support roller (3), and the middle section hangs down to form a downward arc-shaped limiting part (51). The buffer section (61) of the film (6) passes under the limiting part (51) of the limiting member (5).

2. The tension adjustment assembly for a thin film according to claim 1, characterized in that, The limiting member (5) is a flexible strip-shaped plastic sheet.

3. The tension adjustment assembly for a thin film according to claim 1, characterized in that, The inner arc of the limiting part (51) is integrally connected with several counterweights (8); the counterweights (8) are strip-shaped structures along the width direction and are bonded to the surface of the limiting part (51).

4. The tension adjustment assembly for a thin film according to claim 3, characterized in that, The counterweight (8) includes several load-bearing strips (81), the cross-section of the load-bearing strip (81) is an isosceles trapezoid, the longer bottom of the load-bearing strip (81) is connected to the limiting part (51); the trapezoidal inclined surface of the load-bearing strip (81) forms an abutment part (82); the abutment parts (82) of adjacent load-bearing strips (81) press against each other to limit the arc-shaped contour of the limiting part.

5. The tension adjustment assembly for a thin film according to claim 1, characterized in that, The end of the limiting member (5) is fixedly connected to the outer periphery of the support roller (3) and is wound around the support roller (3) at least once. The middle section of the limiting member (5) extends downward from the middle of the two support rollers (3).

6. The tension adjustment assembly for a thin film according to claim 1, characterized in that, The limiting part (51) has an outer edge (52) facing the buffer section (61), and the buffer section (61) has an inner surface (611) of the buffer film on the side close to the limiting part (51). The outer edge (52) of the limiting part and the inner surface (611) of the buffer film form a partial contact in the buffer area (7).

7. The tension adjustment assembly for a thin film according to claim 1, characterized in that, A fixed shaft (4) is provided at the middle position of adjacent buffer rollers (2). The fixed shaft (4) is fixedly connected to the frame (1). The middle section of the limiting member (5) extends upward and is connected to the fixed shaft (4). The limiting member (5) forms two sets of limiting parts (51) on both sides of the fixed shaft (4).

8. The tension adjustment assembly for a thin film according to claim 3, characterized in that, The counterweight (8) is made of nylon material.

9. The tension adjustment assembly for a thin film according to claim 1, characterized in that, The limiting component (5) is made of TPU plastic.

Images