Thin film conveying device

Abstract

The utility model discloses a thin film conveying device which comprises a first conveying roller and a second conveying roller. The second transmission roller is positioned on one side of the first transmission roller; the second transmission roller is matched with the first transmission roller to transmit a film, and at least one of the first transmission roller and the second transmission roller is a negative pressure roller; air holes are unevenly distributed in the outer side face of the negative pressure roller in the axial direction, and the air holes provide negative pressure to adsorb the film. According to the thin film conveying device provided by the embodiment of the utility model, the smoothness of the thin film in the conveying process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, and in particular to a thin-film transmission device. Background Technology

[0002] Thin film transport devices have significant application value in modern industrial production. They are primarily used for the efficient and stable transport and processing of roll-shaped thin film materials on production lines. A typical thin film transport device includes components such as conveyor rollers, tensioning devices, positioning guides, and drive units, which work together to achieve continuous transport of the thin film material.

[0003] In existing thin-film transport devices, wrinkling or creases during film transport are a common problem. A common solution is to increase tension to maintain film flatness, but this introduces new problems such as excessive tension.

[0004] Therefore, there is a need for a new thin-film transport device that can solve the above problems. Utility Model Content

[0005] In view of the above problems, the purpose of this utility model is to provide a thin film transport device to ensure the flatness of the thin film during the transport process.

[0006] According to one aspect of the present invention, a thin-film transport device is provided, comprising:

[0007] First transfer roller; and

[0008] A second transfer roller is located on one side of the first transfer roller; the second transfer roller cooperates with the first transfer roller to transfer the film.

[0009] At least one of the first transfer roller and the second transfer roller is a negative pressure roller; the outer surface of the negative pressure roller has pores unevenly distributed along the axial direction, and the pores provide negative pressure to adsorb the film.

[0010] Optionally, the negative pressure roller includes a cylindrical, hollow transmission body and an air extraction hole; the air extraction hole is located on the upper or lower bottom surface of the negative pressure roller.

[0011] The cavity is connected to both the vent and the extraction port. Gas is discharged through the extraction port to create a negative pressure inside the cavity, thereby providing negative pressure at the vent.

[0012] The outer surface of the negative pressure roller includes a first region, a second region, and a third region distributed sequentially along the axial direction; the first region is close to the air extraction hole, the third region is far from the air extraction hole, and the second region is located between the first region and the third region.

[0013] The first region and the third region are provided with the air pores, and the porosity of the first region is less than that of the third region.

[0014] Optionally, the second region is provided with the pores, and the porosity of the second region is greater than that of the third region.

[0015] Optionally, the thin film transport device further includes:

[0016] A negative pressure pump, connected to the suction port, is used to provide negative pressure to the cavity; and

[0017] A filter screen is disposed between the cavity and the air extraction port to prevent debris in the cavity from entering the negative pressure pump.

[0018] Optionally, the negative pressure roller includes a cylindrical, hollow transmission body, an air extraction hole, and a bearing seat; the air extraction hole and the bearing seat are located on both sides of the transmission body, respectively.

[0019] The thin-film transport device further includes:

[0020] A support wall is provided with mounting holes that match the bearing seat, and the negative pressure roller is mounted on the support wall.

[0021] Optionally, the negative pressure roller includes a cylindrical, hollow transmission body, an air extraction hole, and a removable plug; the air extraction hole and the removable plug are located on both sides of the transmission body, respectively.

[0022] After the removable plug is removed, the cavity is connected to the outside to clean the cavity.

[0023] Optionally, the air holes are arranged in multiple rows along the axial direction of the negative pressure roller, and the air holes are arranged in 1-3 rows along the circumference of the negative pressure roller;

[0024] The opening area of ​​the pores is determined according to the size of the film.

[0025] Optionally, the shape of the pores includes at least one selected from circular, rectangular, elliptical, and irregular shapes.

[0026] Optionally, the thin film transport device further includes:

[0027] An unwinding roller, located on the first side of the negative pressure roller, for unwinding the film;

[0028] A take-up roller, located on the second side of the negative pressure roller, is used to take up the film.

[0029] The negative pressure roller is a parallel roller and / or a guide roller; the negative pressure roller follows the unwinding roller and / or the take-up roller.

[0030] Optionally, the film includes at least one selected from flip-chip film, copper foil, plastic film and carrier tape.

[0031] The film transport device provided in this embodiment of the utility model has air holes unevenly distributed along the axial direction in the negative pressure roller, which serves as the transport roller. This avoids wrinkles on the film in the horizontal direction caused by inconsistent tension on the left and right sides, thus ensuring the flatness of the film during the transport process.

[0032] Furthermore, the porosity is small near the air extraction hole and large far from the air extraction hole, which ensures that the film is subjected to uniform stress at different locations, thereby ensuring the flatness of the film.

[0033] Furthermore, a filter screen is installed between the cavity and the air extraction port to prevent debris from entering the negative pressure pump, thus ensuring the overall stability and safety of the equipment.

[0034] Furthermore, one side of the negative pressure roller has an air extraction hole, and the other side has a bearing seat, which facilitates the wall-mounted fixation of the negative pressure roller.

[0035] Furthermore, a removable seal is provided on one side of the negative pressure roller to facilitate regular cleaning of copper foil debris, dust, film fragments, etc. that may be sucked into the cavity during continuous production. Attached Figure Description

[0036] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0037] Figure 1 A schematic diagram of the structure of a thin-film transport device according to an embodiment of the present invention is shown;

[0038] Figure 2 A three-dimensional structural schematic diagram of the negative pressure roller according to Embodiment 1 of the present invention is shown;

[0039] Figure 3 A cross-sectional view of the front view of the negative pressure roller according to Embodiment 2 of the present invention is shown;

[0040] Figure 4 A right view of the negative pressure roller according to Embodiment 3 of the present invention is shown;

[0041] Figure 5 A cross-sectional view of the front view of the negative pressure roller according to Embodiment 4 of the present invention is shown;

[0042] Figure 6A schematic diagram of an application scenario of the thin-film transport device according to an embodiment of the present invention is shown. Detailed Implementation

[0043] Various embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. In the various drawings, the same elements are indicated by the same or similar reference numerals. For clarity, the various parts in the drawings are not drawn to scale. Furthermore, some well-known parts may not be shown in the drawings.

[0044] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. Many specific details of this utility model, such as the structure, materials, dimensions, processing techniques, and methods of the components, are described below to provide a clearer understanding of the utility model. However, as those skilled in the art will understand, this utility model may be implemented without adhering to these specific details.

[0045] It should be understood that when describing the structure of a component, when referring to a layer or region as being "above" or "on top of" another layer or region, it can mean that it is directly above the other layer or region, or that it contains other layers or regions between it and the other layer or region. Furthermore, if the component is flipped over, that layer or region will be located "below" or "under" the other layer or region.

[0046] The inventors discovered that in roll-to-roll conveying equipment, especially in the conveying of wide-width belts / films, in addition to wrinkling and creases, inconsistent tension in the horizontal direction is a common problem. This inconsistent tension leads to creases in the horizontal direction, severely affecting the conveying quality and flatness of the film. To solve this problem, the inventors proposed a new film conveying device.

[0047] Figure 1 A schematic diagram of the structure of a thin-film transport device according to an embodiment of the present invention is shown. Figure 1 As shown, the film conveying device according to an embodiment of the present invention includes a first conveying roller 100 and a second conveying roller 200.

[0048] Specifically, the second transfer roller 200 is located on one side of the first transfer roller 100, and the second transfer roller 200 cooperates with the first transfer roller to transfer the film 300.

[0049] At least one of the first transfer roller 100 and the second transfer roller 200 is a negative pressure roller. The outer surface of the negative pressure roller has pores unevenly distributed along the axial direction, which provide negative pressure to adsorb the film 300. Optionally, the density of the pores distributed at different positions on the negative pressure roller is determined according to the vacuum level at the corresponding positions.

[0050] Figure 2 A three-dimensional structural schematic diagram of the negative pressure roller according to Embodiment 1 of this utility model is shown. Figure 2 As shown, the negative pressure roller 400 according to Embodiment 1 of this utility model includes a transmission body 410 and an air hole 420. The air hole 420 is disposed on the outer surface of the transmission body 410.

[0051] Figure 3 A cross-sectional view of the negative pressure roller according to Embodiment 2 of the present invention is shown. Figure 3 As shown, the negative pressure roller 400 according to Embodiment 2 of this utility model includes a cylindrical transmission body 410 with an internal cavity 430 and an air extraction hole 440. The air extraction hole 440 is located on the upper or lower bottom surface of the negative pressure roller 400.

[0052] The cavity 430 is connected to the vent 420 and the suction port 440. Gas is discharged through the suction port 440 to create a negative pressure inside the cavity 430, which in turn provides negative pressure at the vent 420.

[0053] The outer surface of the negative pressure roller 400 includes a first region 401, a second region 402, and a third region 403 distributed sequentially along the axial direction (as shown by the dashed box in the figure). The first region 401 is close to the air extraction hole 440, the third region 403 is far from the air extraction hole 440, and the second region 402 is located between the first region 401 and the third region 403. Air pores 420 are provided on the first region 401 and the third region 403, and the porosity of the first region 401 is less than that of the third region 403. Optionally, air pores 420 are provided on the second region 402, and the porosity of the second region 402 is greater than that of the third region 403. Optionally, porosity refers to the ratio of the open area of ​​the air pores 420 to the total area. Taking the first region 401 as an example, the porosity of the first region 401 refers to the ratio of the total open area of ​​the air pores 420 on the first region 401 to the total area of ​​the first region 401. Optionally, the porosity of different regions is determined based on the vacuum level of that region. The first region 401 is close to the evacuation port 440, and the third region 403 is far from the evacuation port 440. During evacuation, the vacuum level of the third region 403 is lower than that of the first region 401, so a larger opening area is provided in the third region 403.

[0054] In an optional embodiment of this invention, the shape of the pores 420 includes at least one selected from circles, rectangles, ellipses, serrated deformed elliptical holes, pentagonal holes, and irregular shapes. Optionally, multiple rows of pores 420 are spaced apart along the axial direction of the negative pressure roller 400, and 1-3 rows of pores 420 are arranged along the circumference of the negative pressure roller 400. The opening area of ​​the pores 420 can be determined according to the size of the film.

[0055] In one specific embodiment, combined with Figure 3As shown, the width (transmission width) of the transmission body 410 is 250mm. Holes 420 are drilled along the axial / transverse direction (TD) of the negative pressure roller 400, starting 30mm from the right end, with a hole diameter ≤0.5mm, until 82mm from the right end (including the hole diameter). Along the axial direction of the negative pressure roller 400, a hole 420 is drilled every 10mm from the left end (30mm-86mm), with a hole diameter ≤1.5mm. Along the axial direction of the negative pressure roller 400, a hole 420 is drilled every 15mm in the middle section, with a hole diameter ≤1mm.

[0056] Figure 4 A right view of the negative pressure roller according to Embodiment 3 of this utility model is shown. Figure 4 As shown, the negative pressure roller according to Embodiment 3 of this utility model includes a roller shaft 450 and a roller sleeve 460 from the inside out.

[0057] Specifically, roller 450 is, for example, a hollow stainless steel tube roller with micropores. Roller sleeve 460 is, for example, a rubber roller sleeve with micropores. The micropores on roller 450 and roller sleeve 460 are aligned and connected to form air holes 420. Optionally, the inside of roller 450 is a cavity, and the diameter of the outer end of roller 450 decreases to form an air extraction hole 440, which is connected to a negative pressure pump (vacuum pump and pressure reducing valve, etc.).

[0058] Figure 5 A cross-sectional view of the negative pressure roller according to Embodiment 4 of the present invention is shown. Figure 5 As shown, the negative pressure roller according to Embodiment 4 of this utility model includes a negative pressure pump (not shown in the figure), a transmission body 410, a cavity 430, an air extraction hole 440, a filter screen 470, a detachable plug 480, and a bearing seat 490.

[0059] Specifically, the negative pressure pump is connected to the suction port 440 to provide negative pressure to the cavity 430. A filter screen 470 is disposed between the cavity 430 and the suction port 440 to prevent debris in the cavity 430 from entering the negative pressure pump.

[0060] Optionally, the negative pressure roller 400 includes a cylindrical transmission body 410 with an internal cavity 430, an air extraction port 440, and a removable plug 480. The air extraction port 440 and the removable plug 480 are located on opposite sides of the transmission body 410. After removing the removable plug 480, the cavity 430 is connected to the outside to clean the cavity 430.

[0061] Optionally, the film conveying device further includes a bearing seat 490 and a support wall (not shown in the figure). An air extraction port 440 and the bearing seat 490 are located on opposite sides of the conveying body 410. The support wall has mounting holes that match the bearing seat 490, and the negative pressure roller 400 is mounted on the support wall. In this embodiment, the negative pressure roller 400 is suitable for wall mounting.

[0062] In an optional embodiment of this invention, the film transport device further includes an unwinding roller and a take-up roller. The unwinding roller is located on a first side of the negative pressure roller to unwind the film. The take-up roller is located on a second side of the negative pressure roller to take up the film. The negative pressure roller is a parallel roller and / or a guide roller, and it follows the unwinding roller and / or the take-up roller. Optionally, the transported film includes at least one selected from flip-chip film, copper foil, plastic film, and carrier tape.

[0063] Figure 6 A schematic diagram illustrating an application scenario of the thin-film transport device according to an embodiment of the present invention is shown. For example... Figure 6 As shown, the unwind roller 10 unwinds the film, and the take-up roller 20 takes it back. Transfer rollers 1 to 7 are used for transporting the film 300. Transfer rollers 1 to 7 are, for example, driven wheels, rotating under the drive of the unwind roller 10 / take-up roller 20. Optionally, transfer rollers (parallel rollers) 4, 5, and 6 are negative pressure rollers. Of course, the above is only one specific embodiment. The film transport device according to this invention can be applied to COF carrier conveying, thin copper foil, thin flexible boards, thin plastic films, etc. The negative pressure rollers can be configured according to actual conditions.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0065] As described above, these embodiments of the present invention do not exhaustively cover all details, nor do they limit the invention to the specific embodiments described. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to effectively utilize the present invention and its modifications. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A thin-film transport device, characterized in that, include: First transfer roller; as well as The second transfer roller is located on one side of the first transfer roller; The second transfer roller cooperates with the first transfer roller to transfer the film. At least one of the first transfer roller and the second transfer roller is a negative pressure roller; the outer surface of the negative pressure roller has pores unevenly distributed along the axial direction, and the pores provide negative pressure to adsorb the film.

2. The thin-film transport device according to claim 1, wherein, The negative pressure roller includes a cylindrical, hollow transmission body and an air extraction hole; the air extraction hole is located on the upper or lower bottom surface of the negative pressure roller. The cavity is connected to both the vent and the extraction port. Gas is discharged through the extraction port to create a negative pressure inside the cavity, thereby providing negative pressure at the vent. The outer surface of the negative pressure roller includes a first region, a second region, and a third region distributed sequentially along the axial direction; the first region is close to the air extraction hole, the third region is far from the air extraction hole, and the second region is located between the first region and the third region. The first region and the third region are provided with the air pores, and the porosity of the first region is less than that of the third region.

3. The thin-film transport device according to claim 2, wherein, The second region is provided with the air pores, and the porosity of the second region is greater than that of the third region.

4. The thin-film transport device according to claim 2, wherein, The thin-film transport device further includes: A negative pressure pump, connected to the suction port, is used to provide negative pressure to the cavity; and A filter screen is disposed between the cavity and the air extraction port to prevent debris in the cavity from entering the negative pressure pump.

5. The thin-film transport device according to claim 1, wherein, The negative pressure roller includes a cylindrical, hollow transmission body, an air extraction hole, and a bearing seat; the air extraction hole and the bearing seat are located on both sides of the transmission body, respectively. The thin-film transport device further includes: A support wall is provided with mounting holes that match the bearing seat, and the negative pressure roller is mounted on the support wall.

6. The thin-film transport device according to claim 1, wherein, The negative pressure roller includes a cylindrical, hollow transmission body, an air extraction hole, and a removable plug; the air extraction hole and the removable plug are located on both sides of the transmission body, respectively. After the removable plug is removed, the cavity is connected to the outside to clean the cavity.

7. The thin-film transport device according to claim 1, wherein, The air holes are arranged in multiple rows along the axial direction of the negative pressure roller, and in 1-3 rows along the circumference of the negative pressure roller. The opening area of ​​the pores is determined according to the size of the film.

8. The thin-film transport device according to claim 1, wherein, The shape of the pores includes at least one selected from circles, rectangles, and ellipses.

9. The thin-film transport device according to claim 1, wherein, The thin-film transport device further includes: An unwinding roller, located on the first side of the negative pressure roller, for unwinding the film; A take-up roller, located on the second side of the negative pressure roller, is used to take up the film. The negative pressure roller is a parallel roller and / or a guide roller; the negative pressure roller follows the unwinding roller and / or the take-up roller.

10. The thin-film transport device according to claim 1, wherein, The film includes at least one selected from flip-chip film, copper foil, plastic film and carrier tape.

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