Laminating device

Abstract

This utility model discloses a film pressing device, including a separating roller group and a film pressing roller group. The separating roller group is located upstream of the film pressing roller group. The film pressing roller group includes a tension wheel and a film pressing wheel. The film pressing roller group also includes a pressure roller, which is located between the tension wheel and the film pressing wheel. The surface of the pressure roller has a first spiral groove group and a second spiral groove group. The first spiral groove group includes at least one first spiral groove, and the second spiral groove group includes at least one second spiral groove. The first spiral grooves extend around the outer peripheral surface of the pressure roller, and the second spiral grooves extend around the outer peripheral surface of the pressure roller. The inclination direction of the multiple first spiral grooves relative to the cross-section of the pressure roller is consistent, and the inclination direction of the multiple second spiral grooves relative to the cross-section of the pressure roller is consistent. The first spiral groove group and the second spiral groove group are respectively distributed on both sides of the width centerline of the pressure roller, and the rotation directions of the first spiral grooves and the second spiral grooves are opposite. This utility model has the advantage of increasing the tension control range during the film pressing process.

Description

Technical Field

[0001] This utility model relates to the field of FMM manufacturing technology, specifically to a film pressing device. Background Technology

[0002] With the ever-increasing demand for various electronic products, the requirements for display screens also need to develop towards higher precision and higher definition. The FMM (fine metal mask) is a core component of the OLED (organic light-emitting diode) evaporation process. The precision of the FMM directly determines the resolution, pixel density (PPI), luminous uniformity, and yield of the OLED panel.

[0003] The FMM production process requires uniform transportation of the membrane material to enable pattern production during the movement process.

[0004] However, in the existing fabrication process, there is a problem of uneven mechanical stress in the membrane material. Utility Model Content

[0005] This invention aims to address one of the technical problems in related technologies to a certain extent. To this end, this invention provides a film pressing device that has the advantage of increasing the tension control range during the film pressing process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A film pressing device includes a separating roller group and a film pressing roller group. The separating roller group is disposed upstream of the film pressing roller group. The film pressing roller group includes a tension wheel and a film pressing wheel. The film pressing roller group also includes a pressure roller disposed between the tension wheel and the film pressing wheel. The surface of the pressure roller has a first spiral groove group and a second spiral groove group. The first spiral groove group includes at least one first spiral groove, and the second spiral groove group includes at least one second spiral groove. The first spiral groove extends around the outer peripheral surface of the pressure roller, and the second spiral groove extends around the outer peripheral surface of the pressure roller. The inclination direction of the plurality of first spiral grooves relative to the cross-section of the pressure roller is consistent, and the inclination direction of the plurality of second spiral grooves relative to the cross-section of the pressure roller is consistent. The first spiral groove group and the second spiral groove group are respectively distributed on both sides of the width centerline of the pressure roller, and the rotation direction of the first spiral groove and the second spiral groove are opposite. During the FMM manufacturing process, the separation roller assembly separates the membrane material to be processed and feeds it into the pressing roller assembly. The membrane material is in a taut state within the pressing roller assembly. The tension roller provides tension to the membrane material, and the pressing roller completes the processing of the membrane material. The pressure roller between the tension roller and the pressing roller is used to even out the mechanical stress in various parts of the membrane material and reduce the occurrence of wrinkles.

[0007] Optionally, the number of first spiral grooves in the first spiral groove group is the same as the number of second spiral grooves in the second spiral groove group, and the first and second spiral groove groups are symmetrical about the width centerline of the pressure roller. The spacing between the first and second spiral grooves is equal, so that the film material in contact with them experiences the same force, improving the uniformity of the film material when passing through the pressure roller and reducing wrinkles caused by uneven distribution of mechanical stress. By symmetrically arranging the first and second spiral groove groups, the stress on both sides of the axial centerline of the pressure roller can be moved and eliminated in the same direction along the groove, so that the stress on both sides can be released to one side through the oblique grooves.

[0008] Optionally, the first and second helical grooves, which are symmetrical to each other, are connected in the middle of the pressure roller. The connection between the first and second helical grooves in the middle of the pressure roller allows the stress of the film material passing through the pressure roller to be dispersed and directed to both ends along the grooves from the middle, which can reduce the formation of wrinkles and improve the production yield.

[0009] Optionally, in the mutually symmetrical first and second spiral grooves, the angle between the connected portions is between 30° and 90°. An included angle is formed between the first and second spiral grooves, and the included angle is between 30° and 90°. The included angle between the first and second spiral grooves is used to guide the stress at various points of the film material to both sides of the pressure roller through the first and second spiral grooves, thereby eliminating wrinkles.

[0010] Optionally, the number of first spiral grooves in the first spiral groove group is greater than or equal to four, and the distance between adjacent first spiral grooves is the same. Having more than or equal to four first spiral grooves can better cover the membrane material, move and eliminate wrinkles in various parts of the membrane material, and the equal distance between adjacent first spiral grooves can uniformly guide stress.

[0011] Optionally, the width of the first spiral groove is between 1 mm and 3 mm; the width of the second spiral groove is between 1 mm and 3 mm. The width of the first and second spiral grooves is greater than or equal to 1 mm to achieve the desired effect on the membrane material, while the width of the first and second spiral grooves is less than or equal to 3 mm to avoid the grooves being too wide to effectively act on the membrane material.

[0012] Optionally, the pitch of the first spiral groove is between 5mm and 20mm. The pitch between adjacent first spiral grooves is between 5mm and 20mm. A pitch greater than 5mm reduces the manufacturing difficulty and cost of producing the pressure roller. Simultaneously, increasing the pitch improves load-bearing capacity and avoids localized overload caused by uneven stress due to an excessively small pitch. A pitch less than 20mm improves the guidance of stress on the film material, enhancing the guiding effect, reducing wrinkles, and increasing yield. The second spiral groove corresponds to the first spiral groove and has the same effect.

[0013] Optionally, the line connecting the tension wheel and the pressure roller and the line connecting the pressing wheel and the pressure roller form an angle of less than 180° and greater than 90°. With the pressure roller installed, there is a relative force between the film material and the pressure roller, causing the tension of the film material before entering the pressure roller to be less than the tension when the film material leaves the tension wheel. This reduces the tension adjustment range. However, by changing the position of the pressure roller to adjust the angle between the tension wheel and the pressure roller, the tension of the film material can be increased, restoring the original tension adjustment range and increasing the adjustability accuracy of the FMM.

[0014] Optionally, the separating roller group includes a roll-out roller, a tearing roller, and a take-up roller. There are two tearing rollers, which are located downstream of the roll-out roller and upstream of the take-up roller and the pressure roller group. The roll-out roller feeds the film material into the tearing roller. After passing through the tearing roller, the film material is separated into PET film (which requires further processing) and PE film (which does not require processing). The two tearing rollers are arranged sequentially. After leaving the tearing roller, the PE film is wound out by the take-up roller to separate the PET film. The PET film, under the action of the tension roller, leaves the tearing roller group and enters the pressure roller group.

[0015] Optionally, the diameter of the tension wheel is smaller than the diameter of the pressure roller, the diameter of the pressure roller is smaller than the diameter of the film-pressing wheel, and the diameter of the film-tearing wheel is smaller than the diameter of the take-up wheel or the take-out wheel. The difference in diameter between adjacent rollers affects the power required to drive the rollers to rotate. A smaller diameter roller requires more power to drive a larger diameter roller than a larger diameter roller requires to drive a smaller diameter roller. By setting the diameter of the active roller in the separating roller group and the film-pressing roller group to be larger than the diameter of the passive roller, the required power can be reduced, thus reducing power demand and lowering production costs.

[0016] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a film pressing device according to the present invention.

[0018] Figure 2 This is a front view of the pressure roller of a film pressing device according to the present invention.

[0019] Figure 3 This is an enlarged view of the pressure roller part of a film pressing device according to this utility model.

[0020] Figure 4 This is a side view of the pressure roller of a film pressing device according to the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Pressing roller group; 11. Tension wheel; 12. Pressing roller; 13. Pressing roller; 131. First spiral groove group; 1311. First spiral groove; 132. Second spiral groove group; 1321. Second spiral groove; 2. Separating roller group; 21. Roll-out roller; 22. Film tearing roller; 23. Take-up roller. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0023] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0024] The drawback of existing FMM (fine metal mask) manufacturing technology is that it reduces the tension control range, which indirectly reduces the accuracy and yield of FMM. At the same time, developing corresponding sensors and matching image processing algorithms and digital twin models increases production costs.

[0025] In this regard, such as Figures 1-4 As shown, this application proposes a film pressing device, including a separating roller group 2 and a film pressing roller group 1. The separating roller group 2 is disposed upstream of the film pressing roller group 1. The film pressing roller group 1 includes a tension wheel 11 and a film pressing wheel 12. The film pressing roller group 1 also includes a pressure roller 13, which is disposed between the tension wheel 11 and the film pressing wheel 12. The surface of the pressure roller 13 has a first spiral groove group 131 and a second spiral groove group 132. The first spiral groove group 131 includes at least one first spiral groove 1311, and the second spiral groove group 132 includes at least one second spiral groove 1311. 21. The first spiral groove extends around the outer peripheral surface of the pressure roller 13, and the second spiral groove extends around the outer peripheral surface of the pressure roller 13. The inclination direction of the plurality of first spiral grooves 1311 relative to the cross-section of the pressure roller 13 is consistent, and the inclination direction of the plurality of second spiral grooves 1321 relative to the cross-section of the pressure roller 13 is consistent. The first spiral groove group 131 and the second spiral groove group 132 are respectively distributed on both sides of the width centerline of the pressure roller 13. The rotation directions of the first spiral groove 1311 and the second spiral groove 1321 are opposite. During the FMM manufacturing process, the separating roller group 2 can separate the film material to be processed and feed it into the pressing roller group 1. The film material is in a taut state within the pressing roller group 1. The tension roller 11 is used to provide tension to the film material, and the pressing roller 12 is used to complete the processing of the film material. The pressure roller 13 between the tension roller 11 and the pressing roller 12 is used to even out the mechanical stress at various points on the film material and reduce the occurrence of wrinkles. It should be noted that, in this embodiment, the first spiral groove 1311 and the second spiral groove 1321 are spiral grooves arranged around the pressure roller 13.

[0026] Specifically, in this embodiment, the first spiral groove 1311 and the second spiral groove 1321 rotate in opposite directions, and the corresponding first spiral groove 1311 and second spiral groove 1321 extend along the outer surface of the pressure roller 13. The first spiral groove 1311 and the second spiral groove 1321 are not parallel to each other and have an intersection point.

[0027] The number of first spiral grooves 1311 in the first spiral groove group 131 is the same as the number of second spiral grooves 1322 in the second spiral groove group 132, and the first spiral groove group 131 and the second spiral groove group 132 are symmetrical about the width centerline of the pressure roller 13. By symmetrically arranging the first spiral groove group 131 and the second spiral groove group 132, the stress on both sides of the axial centerline of the pressure roller 13 can be moved and eliminated in the same direction along the groove, so that the stress on both sides can be released to one side through the oblique grooves.

[0028] The first spiral groove 1311 and the second spiral groove 1321, which are symmetrical to each other, are connected in the middle of the pressure roller 13. The first spiral groove 1311 and the second spiral groove 1321 are connected in the middle of the pressure roller 13, so that the stress of the film material passing through the pressure roller 13 is dispersed and guided to both ends along the groove from the middle, which can reduce the generation of wrinkles and improve the production yield.

[0029] In the mutually symmetrical first spiral groove 1311 and second spiral groove 1321, the angle α between the connected portions is between 30° and 90°. An included angle α is formed between the first spiral groove 1311 and the second spiral groove 1321, and the included angle is between 30° and 90°. The included angle α between the first spiral groove 1311 and the second spiral groove 1321 is used to guide the stress at various points of the film material through the first spiral groove 1311 and the second spiral groove 1321 to both sides of the pressure roller 13, thereby eliminating wrinkles.

[0030] In this embodiment, the angle α between the first spiral groove 1311 and the corresponding second spiral groove 1321 is 60°.

[0031] The first spiral groove group 131 has four or more spiral grooves 1311, and the distance between adjacent spiral grooves 1311 is the same. Having four or more spiral grooves 1311 can better cover the membrane material, move and eliminate wrinkles in various parts of the membrane material, and the distance between adjacent spiral grooves 1311 can uniformly guide stress.

[0032] In this embodiment, there are 5 first spiral grooves 1311 and 5 second spiral grooves 1321.

[0033] The width of the first spiral groove 1311 is between 1 mm and 3 mm; the width of the second spiral groove 1321 is between 1 mm and 3 mm. The width of the first spiral groove 1311 and the second spiral groove 1321 is greater than or equal to 1 mm to achieve the desired effect on the membrane material, while the width of the first spiral groove 1311 and the second spiral groove 1321 is less than or equal to 3 mm to avoid the grooves being too wide to effectively act on the membrane material.

[0034] In this embodiment, the width of the first spiral groove 1311 and the second spiral groove 1321 is 2 mm, which is within the range that can exert force on the membrane material.

[0035] The pitch of the first spiral groove 1311 is between 5mm and 20mm. The pitch between adjacent first spiral grooves 1311 is between 5mm and 20mm. A pitch greater than 5mm reduces the manufacturing difficulty and cost of producing the pressure roller 13. Simultaneously, increasing the pitch improves load-bearing capacity and avoids localized overload caused by uneven stress due to an excessively small pitch. A pitch less than 20mm improves the guiding effect on the film material, reducing wrinkles and increasing yield. The second spiral groove 1321 corresponds to the first spiral groove 1311 and has the same effect.

[0036] In this embodiment, the pitch of the first spiral groove 1311 is 10mm, which can simultaneously meet the characteristics of low production difficulty and high guiding effect, and has the advantage of improving yield.

[0037] The line connecting the tension roller 11 and the pressure roller 13, and the line connecting the pressing roller 12 and the pressure roller 13, form an angle less than 180° and greater than 90°. With the pressure roller 13 in place, there is a relative force between the film material and the pressure roller 13, causing the tension of the film material before entering the pressure roller 12 to be less than the tension when the film material leaves the tension roller 11. This reduces the tension adjustment range. However, by changing the position of the pressure roller 13 to adjust the angle between the tension roller 11 and the pressure roller 12, the tension of the film material can be increased, restoring the original tension adjustment range and increasing the adjustable accuracy of the FMM.

[0038] Specifically, because the actual tension of the film material before entering the pressure roller 12 differs from the tension parameters set in the equipment after the addition of the pressure roller 13, the actual tension reduction after adding the pressure roller 13 is 25N, while the original range was 20-50N. Therefore, the current equipment tension can only be set to 45-50N to match the lower limit of the original range. However, by changing the tilt angle of the film material through the pressure roller 13, and thus changing the angle at which the film material enters the pressure roller 12, the actual tension is increased by 20-30N. That is, the current practically usable tension range is the original 20-50N. By adjusting the film material feeding method when using the pressure roller 13 to control wrinkles, the original tension range can be restored, increasing the adjustability accuracy of the FMM.

[0039] The separating roller group 2 includes a take-up roller 21, a tearing roller 22, and a take-up roller. There are two tearing rollers 22, which are located downstream of the take-up roller 21 and upstream of the take-up roller and the pressure roller group 1. The take-up roller 21 feeds the film material into the tearing roller 22. After passing through the tearing roller 22, the film material is separated into PET film (which requires further processing) and PE film (which does not require processing). The two tearing rollers 22 are arranged sequentially. After leaving the tearing roller 22, the PE film is wound off the PET film by the take-up roller, and the PET film leaves the tearing roller group under the action of the tension roller 11 and enters the pressure roller group 1.

[0040] The diameter of the tension roller 11 is smaller than the diameter of the pressure roller 13, the diameter of the pressure roller 13 is smaller than the diameter of the film pressing roller 12, and the diameter of the film tearing roller 22 is smaller than the diameter of the take-up roller or the take-up roller 21. The difference in diameter between adjacent rollers affects the power required to drive the rollers to rotate. The power required for a smaller diameter roller to drive a larger diameter roller is greater than the power required for a larger diameter roller to drive a smaller diameter roller. By setting the diameter of the active roller in the separating roller group 2 and the film pressing roller group 1 to be larger than the diameter of the passive roller, the required power can be reduced, thus reducing power demand and lowering production costs.

[0041] The advantage of this application is that it improves the film pressing efficiency by using a roll-to-roll method, and the film pressing process can be carried out continuously.

[0042] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A film pressing device, comprising a separating roller group (2) and a film pressing roller group (1), wherein the separating roller group (2) is disposed upstream of the film pressing roller group (1), and the film pressing roller group (1) comprises a tension wheel (11) and a film pressing wheel (12), characterized in that, The pressure roller assembly (1) further includes a pressure roller (13), which is disposed between the tension wheel (11) and the pressure roller (12). The surface of the pressure roller (13) is formed with a first spiral groove assembly (131) and a second spiral groove assembly (132). The first spiral groove assembly (131) includes at least one first spiral groove (1311), and the second spiral groove assembly (132) includes at least one second spiral groove (1321). The first spiral groove extends around the outer peripheral surface of the pressure roller (13), and the second spiral groove extends around the outer peripheral surface of the pressure roller (13). The inclination direction of the plurality of first spiral grooves relative to the cross-section of the pressure roller is consistent, and the inclination direction of the plurality of second spiral grooves relative to the cross-section of the pressure roller is consistent. The first spiral groove assembly and the second spiral groove assembly are respectively distributed on both sides of the width centerline of the pressure roller, and the rotation direction of the first spiral groove and the second spiral groove is opposite.

2. The film pressing device according to claim 1, characterized in that, The number of first spiral grooves (1311) in the first spiral groove group (131) is the same as the number of second spiral grooves (1321) in the second spiral groove group (132), and the first spiral groove group (131) and the second spiral groove group (132) are symmetrical about the width centerline of the pressure roller (13).

3. The film pressing apparatus according to claim 2, wherein The first spiral groove (1311) and the second spiral groove (1321) that are symmetrical to each other are connected in the middle of the pressure roller (13).

4. The film pressing apparatus according to claim 3, wherein In the first spiral groove (1311) and the second spiral groove (1321) which are symmetrical to each other, the angle α between the connected portions of the two is between 30° and 90°.

5. The film pressing device according to any one of claims 1 to 4, characterized in that, The number of first spiral grooves (1311) in the first spiral groove group (131) is greater than or equal to 4, and the distance between adjacent first spiral grooves (1311) is the same.

6. The film pressing device according to any one of claims 1 to 4, characterized in that, The width of the first spiral groove (1311) is between 1 mm and 3 mm; The width of the second spiral groove (1321) is between 1 mm and 3 mm.

7. The film pressing apparatus according to any one of claims 1 to 4, wherein The pitch of the first spiral groove (1311) is between 5 mm and 20 mm.

8. The film pressing device according to any one of claims 1 to 4, characterized in that, The line connecting the tension wheel (11) and the pressure roller (13) and the line connecting the film pressing wheel (12) and the pressure roller (13) form an angle of less than 180° and greater than 90°.

9. The film pressing device according to any one of claims 1 to 4, characterized in that, The separating roller group (2) includes a roll-out roller (21), a film-tearing roller (22), and a take-up roller. There are two film-tearing rollers (22). The film-tearing rollers (22) are located downstream of the roll-out roller (21) and upstream of the take-up roller and the pressing roller group (1).

10. The film pressing apparatus according to claim 9, wherein The diameter of the tension wheel (11) is smaller than the diameter of the pressure roller (13), the diameter of the pressure roller (13) is smaller than the diameter of the film pressing wheel (12), and the diameter of the film tearing wheel (22) is smaller than the diameter of the take-up wheel or the diameter of the take-out wheel (21).

Images