Novel OCA die cutting process

Abstract

The invention relates to the field of die cutting processes, in particular to a novel OCA die cutting process which comprises the following steps: S1, unwinding and coating: unwinding a first release film and a second release film respectively, and coating one surface of the first release film; s2, pressing and curing: pressing the coated surface of the first release film with a second release film, and then curing to obtain an OCA film material; s3, aligning: aligning a die cutting median line of die cutting equipment to a median line of the OCA film material; and S4, die cutting is conducted, specifically, die cutting is conducted on the cured OCA film material, and the OCA sheet is obtained. The method has the effects of reducing the influence on the performance of the OCA sheet and improving the production efficiency of the OCA sheet.

Description

Technical Field

[0001] This application relates to the technical field of die-cutting processes, and in particular to a novel die-cutting process for OCA. Background Technology

[0002] OCA is a special adhesive used for bonding transparent optical components. It is made by creating a substrate-free optical acrylic adhesive, silicone, etc., and then bonding a release film to the top and bottom layers. It is a double-sided adhesive tape without a substrate material. It is the best adhesive for touch screens. In the traditional OCA die-cutting process, the coated and cured finished OCA is usually rolled into a roll and then transported to the die-cutting process. After being die-cut by the die-cutting equipment, it is made into OCA sheets.

[0003] However, the preparation of OCA rolls requires the release film to undergo OCA coating, curing and other steps before being rolled up. When the OCA rolls reach the die-cutting equipment, they need to be re-stretched and then die-cut. This production process is long and involves many steps. Furthermore, the frequent winding and stretching of the OCA rolls has a certain impact on the performance of the OCA sheets and also affects the production efficiency of the OCA sheets. Summary of the Invention

[0004] To reduce the impact on the performance of OCA sheets, this application provides a novel die-cutting process for OCA.

[0005] The above-mentioned inventive objective of this application is achieved through the following technical solutions: A novel die-cutting process for OCA, characterized by the following steps: S1. Unwinding and Coating: Unwind the first release film and the second release film respectively, and coat one surface of the first release film; S2. Pressing and curing: Press the coated side of the first release film with the second release film, and then cure it to obtain the OCA film material; S3. Alignment: Align the die-cutting center line of the die-cutting equipment with the center line of the OCA film material; S4. Die-cutting: The cured OCA film is die-cut to obtain OCA sheets.

[0006] The applicant's research found that in the traditional die-cutting process, the process of rolling OCA into a roll, then unrolling it, and then die-cutting it is generally suitable for OCA sheets with a thickness of less than 500μm. For OCA sheets with a thickness greater than 500μm, rolling is difficult and it is hard to transport them to the die-cutting process.

[0007] Therefore, by adopting the above technical solution, the OCA coating and die-cutting equipment coats and cures the release film roll, and then the die-cutting center line of the die-cutting equipment is aligned with the cured OCA film before die-cutting is performed directly, completing the production of OCA sheet in one go. There is no need to go through winding and unwinding, which can reduce the impact on the performance of OCA sheet and improve the production efficiency of OCA sheet.

[0008] Preferably, the humidity is controlled within the range of 55%-65%, the static electricity generated in the working environment is relatively small, and the temperature is controlled within the range of 20-25℃, which makes the flow of OCA more stable and facilitates subsequent processes. Wearing cleanroom suits can reduce dust stirring and ensure the cleanliness of OCA.

[0009] Another object of this application is to provide an OCA coating die-cutting device for die-cutting OCA rolls.

[0010] An OCA coating and die-cutting device includes: Chassis; An unwinding mechanism is located on the feed side of the machine casing, and the unwinding mechanism is used to unwind the first release film and the second release film; A coating mechanism for coating one surface of a first release film; A pressing mechanism for pressing the side of the first release film coated with the second release film together; The curing mechanism is used to cure the pressed OCA film material; A die-cutting mechanism is disposed on the discharge side of the machine casing, and the die-cutting mechanism is used to die-cut the cured OCA film material; Alignment mechanism, connected to the die-cutting mechanism, for aligning the die-cutting center line of the die-cutting mechanism with the center line of the OCA film material; A conveying mechanism for sequentially conveying the release film roll to the coating mechanism, the pressing mechanism, the curing mechanism, and the die-cutting mechanism; The unwinding mechanism, the coating mechanism, the pressing mechanism, the curing mechanism, and the die-cutting mechanism are sequentially arranged in the machine casing.

[0011] The applicant's research found that in the traditional die-cutting process, a correction mechanism is set up before die-cutting to trim the film material. This involves moving and correcting the position of the film material to align its center line with the die-cutting center line of the die-cutting equipment. This method is generally suitable for OCA film materials with a small thickness and for cases where the entire OCA production line is short. However, for OCA film materials with a thickness greater than 500μm and for cases where the OCA production line is long, it is difficult to correct the OCA film material before die-cutting. Therefore, by adopting the above technical solution, when processing the release film, the release film roll is first unwound into a release film using an unwinding assembly. Then, the release film is sequentially conveyed to a coating mechanism for coating and to a curing device for curing via a conveying mechanism. Next, under the action of an alignment mechanism, the die-cutting center line of the die-cutting mechanism is aligned with the center line of the OCA film. Then, the OCA film is conveyed to a die-cutting device for die-cutting. This enables direct processing of OCA coating, OCA curing, and precise OCA die-cutting without the need for rewinding and unwinding. This reduces the impact of rewinding and unwinding processes on the performance of the OCA sheet and lowers material handling costs. It is also suitable for direct production of OCA sheets with a thickness of 500-2000μm.

[0012] In a preferred embodiment, this application can be further configured as follows: the alignment mechanism includes a slide table, a first infrared sensor, a second infrared sensor, a controller, and a drive assembly; the die-cutting mechanism is connected to the slide table; the slide table is slidably disposed on the chassis along the width direction of the OCA film; the first infrared sensor and the second infrared sensor are both vertically mounted on the slide table; the distances from the first infrared sensor and the second infrared sensor to the die-cutting center line of the die-cutting mechanism are the same; the controller and the drive assembly are both mounted on the chassis; the drive assembly, the first infrared sensor, and the second infrared sensor are all controlled and connected to the controller; the drive assembly is used to drive the slide table to move; and the slide table is provided with an adjustment component for adjusting the distance between the first infrared sensor and the second infrared sensor.

[0013] By adopting the above technical solution, under the action of the adjustment component, the operator adjusts the distance between the first infrared sensor and the second infrared sensor to the width of the OCA film. Then, when the OCA film is conveyed to the die-cutting mechanism, since both the first and second infrared sensors are controlled and connected to the controller, the controller can detect whether the OCA film is located between the first and second infrared sensors. If not, the controller will send a signal to the drive component, causing the drive component to drive the slide table to move the die-cutting mechanism until the OCA film is located between the first and second infrared sensors. At this time, the die-cutting center line of the die-cutting mechanism is aligned with the center line of the OCA film. There is no need to align the center line by correcting the film, which is more flexible and can adapt to the correction of OCA film of various sizes.

[0014] In a preferred embodiment, the present application may be further configured such that: the drive assembly includes at least one rodless cylinder, and a plurality of the rodless cylinders are mounted on the chassis along the width direction of the OCA membrane material; the rodless cylinders are used to drive the slide table to move; and the controller is connected to the rodless cylinders for control.

[0015] By adopting the above technical solution and setting up rodless cylinders, the slide table can be moved directly. Rodless cylinders have the advantages of saving space, bearing high load and high precision, and are suitable for this working condition. Furthermore, by setting up multiple rodless cylinders, the stability of the slide table moving the die-cutting mechanism can be improved.

[0016] In a preferred embodiment, the present application may be further configured such that: the drive assembly includes a first screw and a first drive member for driving the first screw to rotate, the first screw is rotatably disposed in the housing, the first screw is threaded through the slide table along the width direction of the OCA film, and the controller is controlled and connected to the first drive member.

[0017] By adopting the above technical solution, based on the principle of screw drive, the first screw is driven to rotate by the driving component, which enables the slide table to drive the die-cutting mechanism to slide.

[0018] In a preferred embodiment, the present application may be further configured such that: the chassis is provided with at least one guide rod, each of the guide rods sliding through the slide table along the width direction of the OCA membrane material.

[0019] By adopting the above technical solution and setting guide rods, the slide table can be guided, and the stability of the drive assembly driving the slide table to move can be further improved.

[0020] In a preferred embodiment, the present application may be further configured such that: the pressing mechanism includes an upper pressure roller and a lower pressure roller, both of which are rotatably mounted on the housing, and the upper pressure roller and the lower pressure roller form a gap for the release film to pass through; the housing is provided with a first lifting assembly for driving the upper pressure roller to rise and fall and a second lifting assembly for driving the lower pressure roller to rise and fall.

[0021] By adopting the above technical solution, when the release film passes through the gap between the upper and lower pressure rollers, the first lifting component drives the upper pressure roller to approach the lower pressure roller, and the second lifting component drives the lower pressure roller to approach the upper pressure roller, so as to adjust the gap width between the upper and lower pressure rollers, so that the upper and lower pressure rollers abut against each other, and the first release film coated with OCA adhesive and the second release film are pressed together to form a film material.

[0022] In a preferred embodiment, the present application may be further configured such that the chassis is provided with a scraper for abutting against the outer surface of the upper pressure roller and / or the lower pressure roller, the blade of the scraper facing the outer surface of the upper pressure roller and / or the outer surface of the lower pressure roller.

[0023] By adopting the above technical solution, before the first release film and the second release film are pressed together, the scraper presses the first release film against the outer surface of the upper pressure roller or the outer surface of the lower pressure roller, and scrapes off the remaining material on the first release film, so as to ensure that the amount of OCA adhesive coated on the first release film is uniform and accurate, and to ensure that the thickness of the OCA adhesive layer is uniform.

[0024] In a preferred embodiment, the present application may be further configured such that: the coating mechanism is a roller coating mechanism, a spray coating mechanism, or a scraper coating mechanism; and the curing mechanism is a UV curing mechanism, a thermal curing mechanism, or a UV photothermal curing mechanism.

[0025] Through the above technical solutions, OCA adhesive can be applied to the first release film by roller coating, spraying, and scraping. OCA adhesive can be cured and formed by UV curing, thermal curing, and UV photothermal curing. This makes the coating and curing combination of this technical solution diverse and can be adjusted according to the actual required OCA sheet products, with high flexibility and strong applicability.

[0026] In a preferred embodiment, the present application may be further configured such that: the die-cutting mechanism includes a support platform and a plurality of die-cutting components disposed on the support platform, the support platform is fixedly connected to the slide table, and the die-cutting components include a die-cutting blade and a third lifting component for driving the die-cutting blade to rise and fall.

[0027] By adopting the above technical solution, after the die-cutting center line of the die-cutting mechanism is aligned with the center line of the OCA film, the die-cutting blade is driven to rise and fall by the third lifting component until it comes into contact with the OCA film. As the OCA film is conveyed, the OCA film can be accurately die-cut.

[0028] In summary, this application includes at least one of the following beneficial technical effects: 1. The OCA coating and die-cutting equipment coats and cures the release film roll. Then, the die-cutting center line of the die-cutting equipment is aligned with the cured OCA film and die-cutting is performed directly, completing the production of OCA sheets in one go. There is no need for rewinding and unwinding, which can reduce the impact on the performance of OCA sheets and improve the production efficiency of OCA sheets.

[0029] 2. When processing the release film, the release film roll is first unwound into a release film using an unwinding assembly. Then, the release film is sequentially conveyed to the coating mechanism for coating and to the curing equipment for curing by a conveying mechanism. Next, under the action of the alignment mechanism, the die-cutting center line of the die-cutting mechanism is aligned with the center line of the OCA film. Then, the OCA film is conveyed to the die-cutting device for die-cutting. This enables direct processing of OCA coating, OCA curing, and precise OCA die-cutting without the need for rewinding and unwinding. This reduces the impact of rewinding and unwinding processes on the performance of the OCA sheet and reduces material transfer costs. It is also suitable for direct production of OCA sheets with a thickness of 500-2000μm.

[0030] 3. Under the action of the adjustment component, the operator adjusts the distance between the first infrared sensor and the second infrared sensor to the width of the OCA film. Then, when the OCA film is conveyed to the die-cutting mechanism, since both the first and second infrared sensors are connected to the controller, the controller can detect whether the OCA film is located between the first and second infrared sensors. If not, the controller will send a signal to the drive component, causing the drive component to drive the slide table to move the die-cutting mechanism until the OCA film is located between the first and second infrared sensors. At this time, the die-cutting center line of the die-cutting mechanism is aligned with the center line of the OCA film. There is no need to align the center line by correcting the film, which is more flexible and can adapt to the correction of OCA film of various sizes. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of the OCA coating and die-cutting equipment in this application; Figure 2 This is a schematic diagram of the structure of a drive component for driving the slide table to move in one embodiment of this application; Figure 3 This is a schematic diagram of the structure of a drive assembly for moving a slide table in another embodiment of this application.

[0032] Figure 4 This is a schematic diagram of the structure of the roller coating mechanism in one embodiment of this application; Figure 5 This is a schematic diagram of the spraying mechanism in one embodiment of this application; Figure 6 This is a cross-sectional schematic diagram of the OCA coating and die-cutting equipment in this application; Figure 7 This is a partial structural schematic diagram of the OCA coating and die-cutting equipment in this application; Figure 8 This is a schematic diagram of the structure of a die-cutting circular blade in one embodiment of this application; Reference numerals: 1. First release film; 2. Second release film; 3. Machine housing; 4. Unwinding mechanism; 41. Unwinding roller; 5. Coating mechanism; 51. Roller coating mechanism; 511. Coating roller; 512. Glue storage tray; 513. Abutment roller; 514. Second drive component; 52. Spraying mechanism; 521. Second screw; 522. Slide; 523. Glue spraying tube; 524. Glue storage tank; 525. Third drive component; 526. Nozzle; 527. Liquid... 53. Pump; 53. Scraping mechanism; 531. Glue storage tank; 6. Pressing mechanism; 61. Upper pressure roller; 62. Lower pressure roller; 63. First lifting assembly; 64. Second lifting assembly; 65. Scraper; 7. Curing mechanism; 8. Die-cutting mechanism; 81. Support platform; 82. Die-cutting blade; 821. Die-cutting flat blade; 8211. Lifting plate; 8212. Die-cut part; 8213. Upright pole; 822. Die-cutting circular blade; 8221. Upper die-cutting roller; 8222 8223. Lower die-cutting roller; 8224. Die-cutting layer; 8225. Gantry frame; 8226. Second slide rail; 8227. Second bearing seat; 8228. Fifth drive component; 83. Third lifting assembly; 9. Alignment mechanism; 91. Slide table; 92. First infrared sensor; 93. Second infrared sensor; 94. Drive assembly; 941. Rodless cylinder; 942. First screw; 943. First drive component; 95. Adjustment assembly; 951. Adjustment 952. Rod; 953. First adjusting block; 954. Second adjusting block; 955. Guide rod; 10. Conveying mechanism; 101. Guide roller; 11. Traction mechanism; 111. Traction assembly; 1111. Conduction roller; 1112. Support frame; 1113. Mounting guide groove; 1114. Upper traction roller; 1115. Lower traction roller; 1116. First chute; 1117. First bearing seat; 1118. Third screw; 1119. Fourth driving component. Detailed Implementation

[0033] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0034] It should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this disclosure.

[0035] Furthermore, the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article, unless otherwise specified, generally indicates that the preceding and following related objects have an "or" relationship.

[0036] The following describes a novel OCA die-cutting process according to the present application with reference to the accompanying drawings, including the following steps: S1. Unwinding and Coating: Unwind the first release film 1 and the second release film 2 respectively, and coat one surface of the first release film 1.

[0037] S2. Pressing and curing: Press the coated side of the first release film 1 with the second release film 2, and then cure it to obtain the OCA film material.

[0038] It should be noted that, in this embodiment, the release film roll includes a first release film 1 and a second release film 2. The first release film 1 can be used as a light release film for the OCA film material, and the second release film 2 can be used as a heavy release film for the OCA film material. Alternatively, the first release film 1 can be used as a heavy release film for the OCA film material, and the second release film 2 can be used as a light release film for the OCA film material.

[0039] S3. Alignment: Align the die-cutting center line of the die-cutting equipment with the center line of the OCA film material.

[0040] In S3, the die-cutting center line refers to a line of action that passes through the center of the part of the die-cutting equipment that performs the die-cutting action, and this line of action is parallel to the conveying direction of the OCA film material.

[0041] S4. Die-cutting: The cured OCA film is die-cut to obtain OCA sheets.

[0042] It should be noted that in traditional die-cutting processes, the process of rolling OCA into a roll, then unwinding it, and finally die-cutting it is generally suitable for OCA sheets with a thickness of less than 500μm. For OCA sheets with a thickness greater than 500μm, rolling is difficult and transporting them to the die-cutting process is challenging. This application uses an OCA coating and die-cutting equipment to coat and cure the release film roll. Then, the die-cutting center line of the die-cutting equipment is aligned with the cured OCA film before direct die-cutting, completing the production of the OCA sheet in one step without the need for further rolling and unwinding. This reduces the impact on the performance of the OCA sheet and improves the production efficiency of OCA sheets.

[0043] Furthermore, such as Figure 1 As shown, the OCA coating and die-cutting equipment includes a housing 3. Along the conveying direction, the housing 3 is sequentially equipped with an unwinding mechanism 4, a coating mechanism 5, a pressing mechanism 6, a curing mechanism 7, a die-cutting mechanism 8, and an alignment mechanism 9. The unwinding mechanism 4 is located on the feeding side of the housing 3 and is used to unwind the first release film 1 and the second release film 2. The coating mechanism 5 is used to coat one surface of the first release film 1. The pressing mechanism 6 is used to press the coated side of the first release film 1 against the second release film 2. The curing mechanism 7 is used to cure the pressed OCA film. The die-cutting mechanism 8 is located on the discharge side of the housing 3 and is used to die-cut the cured OCA film. The alignment mechanism 9 is connected to the die-cutting mechanism 8 and is used to align the die-cutting center line of the die-cutting mechanism 8 with the center line of the OCA film. The housing 3 also includes a mechanism for... The roll material is sequentially conveyed to the coating mechanism 5, pressing mechanism 6, curing mechanism 7, and die-cutting mechanism 8 via the conveying mechanism 10. When processing the release film, the release film roll is first unwound into a release film by the unwinding assembly. Then, the release film is sequentially conveyed to the coating mechanism 5 for coating and to the curing equipment for curing by the conveying mechanism 10. Next, under the action of the alignment mechanism 9, the die-cutting center line of the die-cutting mechanism 8 is aligned with the center line of the OCA film material. Then, the OCA film material is conveyed to the die-cutting device for die-cutting. This enables direct processing of OCA coating, OCA curing, and precise OCA die-cutting without the need for rewinding and unwinding. This reduces the impact of rewinding and unwinding processes on the performance of the OCA sheet and reduces material transfer costs. It is also suitable for direct production of OCA sheets with a thickness of 500-2000μm.

[0044] Among them, such as Figure 2 and Figure 3As shown, the alignment mechanism 9 includes a slide table 91, a first infrared sensor 92, a second infrared sensor 93, a controller (not shown), and a drive assembly 94. The die-cutting mechanism 8 is connected to the slide table 91. The slide table 91 is slidably mounted on the housing 3 along the width direction of the OCA film. The first infrared sensor 92 and the second infrared sensor 93 are both vertically mounted on the slide table 91. The line connecting the first infrared sensor 92 and the second infrared sensor 93 is in the same direction as the width direction of the OCA film. The distances from the first infrared sensor 92 and the second infrared sensor 93 to the die-cutting center line of the die-cutting mechanism 8 are the same. The controller and the drive assembly 94 are both mounted on the housing 3. The drive assembly 94, the first infrared sensor 92, and the second infrared sensor 93 are all controlled and connected to the controller. The drive assembly 94 is used to drive the slide table 91 to move. The slide table 91 is provided with a mechanism for adjusting the first infrared sensor 92 and the second infrared sensor 93. The adjustment component 95 for the spacing of the sensors 93 allows the operator to adjust the spacing between the first infrared sensor 92 and the second infrared sensor 93 to match the width of the OCA film. When the OCA film is conveyed to the die-cutting mechanism 8, since both the first infrared sensor 92 and the second infrared sensor 93 are connected to the controller, the controller can detect whether the OCA film is located between the first infrared sensor 92 and the second infrared sensor 93. If not, the controller will send a signal to the drive component 94, causing the drive component 94 to drive the slide table 91 to slide the die-cutting mechanism 8 until the OCA film is located between the first infrared sensor 92 and the second infrared sensor 93. At this time, the die-cutting center line of the die-cutting mechanism 8 is aligned with the center line of the OCA film. There is no need to align the center line by correcting the film, making it more flexible and adaptable to the correction of OCA film of various sizes.

[0045] In this embodiment, the adjustment assembly 95 includes an adjustment rod 951, a first adjustment block 952, and a second adjustment block 953. The adjustment rod 951 is rotatably mounted on the slide table 91 along the width direction of the OCA film. The adjustment rod 951 has a first threaded section and a second threaded section along its length direction, with the thread directions of the first threaded section and the second threaded section being opposite. A first infrared sensor 92 is mounted on the first adjustment block 952, and a second infrared sensor 93 is mounted on the second adjustment block 953. The first adjustment block 952 passes through the adjustment rod 951 and is threadedly engaged with the first threaded section, and the second adjustment block 953 passes through the adjustment rod 951 and is threadedly engaged with the second threaded section. This allows the first adjustment block 952 and the second adjustment block 953 to drive the first infrared sensor 92 and the second infrared sensor 93 to move towards or away from each other when the adjustment rod 951 rotates, thereby adjusting the distance between the first infrared sensor 92 and the second infrared sensor 93. The slide table 91 is equipped with a motor for driving the adjustment rod 951 to rotate on its own axis, providing a rotational power source for the adjustment rod 951.

[0046] In one embodiment, such as Figure 2As shown, the drive assembly 94 includes at least one rodless cylinder 941. Multiple rodless cylinders 941 are mounted on the housing 3 along the width direction of the OCA film. The rodless cylinders 941 are used to drive the slide table 91 to move. The controller is connected to the rodless cylinders 941. By setting the rodless cylinders 941, the slide table 91 can be driven to move directly. The rodless cylinders 941 have the advantages of saving space, bearing high load and high precision, and are suitable for this working condition. Furthermore, by setting multiple rodless cylinders 941, the stability of the slide table 91 driving the die-cutting mechanism 8 to move can be improved.

[0047] In another embodiment, such as Figure 3 As shown, the drive assembly 94 includes a first screw 942 rotatably mounted on the housing 3 and a first drive member 943 for driving the first screw 942 to rotate. The first drive member 943 can be a motor. By coaxially fixing the first screw 942 to the output shaft of the motor, the first screw 942 obtains a rotational power source. The first screw 942 is threaded through the slide table 91 along the width direction of the OCA film. The controller is connected to the drive member. According to the principle of screw drive, the drive member drives the first screw 942 to rotate, which enables the slide table 91 to drive the die-cutting mechanism 8 to slide.

[0048] Furthermore, such as Figure 3 As shown, the chassis 3 is provided with at least one guide rod 96. Each guide rod 96 slides through the slide table 91 along the width direction of the OCA film material. By setting the guide rod 96, the slide table 91 can be guided, and the stability of the drive assembly 94 driving the slide table 91 to move can be further improved.

[0049] like Figure 4 and Figure 6 As shown, the unwinding mechanism 4 includes two sets of unwinding components. Each set of unwinding components includes an unwinding roller 41. The unwinding roller 41 is rotatably connected to the feed side of the housing 3. The release film roll is wound onto the outer surface of the unwinding roller 41. The unwinding roller 41 provides an installation position for the release film roll. The release film roll is moved by the conveying mechanism 10 so that the unwinding roller 41 drives the release film roll to rotate in the same direction, which can realize the unfolding of the release film roll. In this embodiment, the two unwinding rollers 41 respectively wind up the first release film 1 and the second release film 2 to realize the simultaneous unwinding process of the first release film 1 and the second release film 2.

[0050] In addition, such as Figure 4 and Figure 6As shown, the pressing mechanism 6 includes an upper pressure roller 61 and a lower pressure roller 62. Both the upper pressure roller 61 and the lower pressure roller 62 are rotatably mounted on the housing 3. The upper pressure roller 61 and the lower pressure roller 62 form a gap for the release film to pass through. The housing 3 is provided with a first lifting assembly 63 for driving the upper pressure roller 61 to rise and fall, and a second lifting assembly 64 for driving the lower pressure roller 62 to rise and fall. When the release film passes through the gap between the upper pressure roller 61 and the lower pressure roller 62, the first lifting assembly 63 drives the upper pressure roller 61 to move closer to the lower pressure roller 62, and the second lifting assembly 64 drives the lower pressure roller 62 to move closer to the upper pressure roller 61, so as to adjust the gap between the upper pressure roller 61 and the lower pressure roller 62. The gap width is adjusted so that the upper pressure roller 61 and the lower pressure roller 62 abut against each other, pressing the first release film 1 and the second release film 2 coated with OCA adhesive together to form a film material. In this embodiment, the first lifting assembly 63 and the second lifting assembly 64 both include two cylinders. The two cylinders are respectively vertically installed on opposite sides of the housing 3 and the piston rods of the two cylinders are respectively installed at opposite ends of the upper pressure roller 61 or the lower pressure roller 62, so that the upper pressure roller 61 and the lower pressure roller 62 can be lifted and lowered. The cylinder is a commonly used driving element. The specific connection relationship between the cylinder and the upper pressure roller 61 and the lower pressure roller 62 is common knowledge to those skilled in the art and will not be described in detail here.

[0051] Furthermore, such as Figure 4 and Figure 6 As shown, the housing 3 is provided with a scraper 65 for abutting against the outer surface of the upper pressure roller 61 and / or the lower pressure roller 62. The blade of the scraper 65 faces the outer surface of the upper pressure roller 61 and / or the outer surface of the lower pressure roller 62. There is an abutting channel between the scraper 65 and the outer surface of the upper pressure roller 61 and / or the lower pressure roller 62 for the first release film 1 to pass through. Before the first release film 1 and the second release film 2 are pressed together, the scraper 65 abuts the first release film 1 against the outer surface of the upper pressure roller 61 or the outer surface of the lower pressure roller 62, and scrapes off the remaining material on the first release film 1 to ensure that the amount of OCA adhesive coated on the first release film 1 is uniform and accurate, and to ensure that the thickness of the OCA adhesive layer is uniform.

[0052] In addition, the coating mechanism 5 is a roller coating mechanism 51, a spray coating mechanism 52, or a scraper coating mechanism 53, and the curing mechanism 7 is a UV light curing mechanism 7, a heat curing mechanism 7, or a UV photothermal curing mechanism 7. Specifically, the heat curing mechanism 7 heats and cures the OCA by heating, and the UV light curing mechanism 7 cures the OCA by irradiating it with ultraviolet light. UV photothermal curing is usually a double curing process of initial fixation by ultraviolet light irradiation followed by fixation by heating. Roller coating, spray coating, and scraper coating can all achieve the coating of OCA adhesive on the first release film 1. UV light curing, heat curing, and UV photothermal curing can all achieve the curing and molding of OCA adhesive. It can be adjusted according to the actual required OCA sheet products, with high flexibility and strong applicability.

[0053] In one embodiment, such as Figure 4As shown, the roller coating mechanism 51 includes a coating roller 511, a glue storage tray 512 for holding OCA, and an abutting roller 513 for abutting the coating roller 511. The coating roller 511 is rotatably connected to the housing 3. The bottom of the outer surface of the coating roller 511 is located at the inner liquid surface of the glue storage tray 512. The abutting roller 513 is located directly above the coating roller 511 and is rotatably mounted on the housing 3. A gap is formed between the abutting roller 513 and the coating roller 511 for the passage of the first release film 1. The housing 3 is provided with a second driving member 514 for driving the abutting roller 513 to rise and fall. The second driving member 514 can be selected as two cylinders respectively vertically mounted on opposite sides of the housing 3. Under the driving action of the two cylinders, the abutting roller 513 can be raised and lowered. Cylinders are commonly used driving elements. The specific connection relationship between the cylinders and the abutting roller 513 is common knowledge to those skilled in the art and will not be described in detail here. When the release film passes through the gap between the abutment roller 513 and the coating roller 511, the abutment roller 513 is driven by a cylinder to approach the coating roller 511, so that the abutment roller 513 abuts against the first release film 1 and drives the first release film 1 to abut against the coating roller 511. Under the drive of the first release film 1, the coating roller 511 rotates and coats the OCA in the glue storage tray 512 onto the first release film 1, thus completing the coating process.

[0054] In another embodiment, such as Figure 5 As shown, the spraying mechanism 52 includes a second screw 521, a slide 522, a spray tube 523, and a glue storage tank 524 for holding OCA. The second screw 521 is horizontally rotatably mounted on the housing 3. The slide 522 is threaded through the second screw 521 along its length. The housing 3 is provided with a third drive component 525 for driving the second screw 521 to rotate on its own axis. The third drive component 525 can be a motor. The motor is fixedly mounted on the housing 3, and its output shaft is coaxially fixedly connected to the second screw 521, enabling the rotation of the second screw 521. One end of the spray tube 523 is connected to the glue storage tank. The other end of the glue spraying tube 523 passes through the slide 522 and is equipped with a nozzle 526 for spraying glue. The nozzle 526 faces between the unwinding roller 41 and the lower pressure roller 62 to spray glue onto the first release film 1. The glue storage tank 524 is equipped with a liquid pump 527 for conveying OCA glue to the glue spraying tube 523. According to the principle of screw drive, the second screw 521 is driven by the motor to rotate, so that the slide 522 drives the glue spraying tube 523 to move horizontally. Then, in conjunction with the liquid pump 527, the OCA glue is sprayed out from the nozzle 526 to achieve multi-directional glue spraying onto the first release film 1 and complete the coating process.

[0055] In yet another embodiment, such as Figure 6As shown, the coating mechanism includes a glue storage tank 531 for holding OCA. The glue storage tank 531 has an opening on one side and is inclinedly disposed in the housing 3. The opening end of the glue storage tank 531 faces the outer surface of the lower pressure roller 62. There is a gap between the opening end of the glue storage tank 531 and the lower pressure roller 62 for the first release film 1 to pass through. When the first release film 1 passes between the upper pressure roller 61 and the lower pressure roller 62, the first release film 1 abuts against the opening end of the glue storage tank 531 and is used to close the opening end of the glue storage tank 531. Due to the inclined placement of the glue storage tank 531, under the action of gravity, the OCA slides down towards the opening end of the glue storage tank 531 until it abuts against the first release film 1, thereby achieving the application of glue to the first release film 1 and completing the coating process.

[0056] It should be noted that, as Figure 6 As shown, in order to transport the release film roll, in this embodiment, the transport mechanism 10 includes multiple guide rollers 101. The multiple guide rollers 101 are arranged and rotated in the housing 3 along the transport direction of the release film roll. The housing 3 is provided with a transmission mechanism (not shown in the figure) for driving all guide rollers 101 to rotate in the same direction. The transmission mechanism includes a sprocket and chain drive structure and a motor that drives any sprocket to rotate. By driving multiple guide rollers 101 to rotate in the same direction, the release film roll can be continuously provided with transport power. The sprocket and chain drive structure is a commonly used transmission element. The specific connection relationship between the sprocket, chain, guide roller 101 and motor is not described here.

[0057] Furthermore, such as Figure 6 and Figure 7 As shown, the OCA coating and die-cutting equipment also includes a traction mechanism 11 disposed between the curing mechanism 7 and the die-cutting mechanism 8. The traction mechanism 11 includes at least one set of traction components 111. Each set of traction components 111 includes a guide roller 1111 and two symmetrically arranged support frames 1112. Each support frame 1112 has several mounting guide grooves 1113 arranged along its own height direction. The end of the guide roller 1111 is embedded in the mounting guide groove 1113. The traction mechanism 11 can pull and tighten the cured OCA film material, so that the subsequent OCA sheet can be accurately die-cut. Moreover, the arrangement of the support frame 1112 and its mounting guide groove 1113 can adjust the traction force of the traction mechanism 11 on the OCA film material according to the die-cutting requirements of the OCA sheet by setting the guide roller 1111 in the mounting guide groove 1113 at different heights.

[0058] Specifically, the traction assembly 111 further includes an upper traction roller 1114 and a lower traction roller 1115. Both the upper traction roller 1114 and the lower traction roller 1115 are rotatably mounted between two support frames 1112. Each support frame 1112 has a first groove 1116 along its height direction. A first bearing seat 1117 is slidably connected within the first groove 1116. The upper traction roller 1114 is rotatably connected between the two first bearing seats 1117. A third screw 1118 is threaded through the first bearing seat 1117 along the length of the first groove 1116. A fourth driving member 1119 for driving the lower traction roller 1115 to rotate is provided on the outside of the support frame 1112. The fourth driving member 1119 can be a motor. (The last sentence appears to be incomplete and possibly refers to a separate process: "When the release film roll is removed from the curing machine...") When the output of the mechanism 7 is between the upper traction roller 1114 and the lower traction roller 1115, the first bearing seat 1117 drives the upper traction roller 1114 to move downwards until it abuts against the lower traction roller 1115 by rotating the third screw 1118. At this time, the release film roll abuts between the upper traction roller 1114 and the lower traction roller 1115. The lower traction roller 1115 is driven to rotate by the motor. Under the action of rolling friction, it can drive the upper traction roller 1114 to rotate in the opposite direction at the same time. Under the rolling abutment action of the upper traction roller 1114 and the lower traction roller 1115, the release film roll is pulled. The auxiliary conveying mechanism 10 provides conveying power to the release film roll and can improve the flatness of the release film roll to improve the die-cutting effect of the subsequent die-cutting mechanism 8.

[0059] like Figure 7 and Figure 8 As shown, the die-cutting mechanism 8 includes a support platform 81 and several die-cutting components disposed on the support platform 81. The support platform 81 is fixedly connected to the slide table 91. The die-cutting components include a die-cutting blade 82 and a third lifting component 83 for driving the die-cutting blade 82 to rise and fall. After the die-cutting center line of the die-cutting mechanism 8 is aligned with the center line of the OCA film, the die-cutting blade 82 is driven to rise and fall by the third lifting component 83 until it comes into contact with the OCA film. With the OCA film being conveyed, the OCA film can be accurately die-cut.

[0060] Furthermore, to prevent adhesive pulling when the die-cutting blade 82 is die-cutting the coated release film, an anti-sticking agent is used to lubricate the die-cutting blade 82 before die-cutting. The anti-sticking agent can be paraffin wax, Teflon, silicone oil, etc. By using the anti-sticking agent to treat the die-cutting blade 82, adhesive pulling can be reduced when the die-cutting blade 82 is die-cutting the coated release film roll, thereby reducing the defect rate of OCA processing and reducing the impact on the performance of OCA sheets.

[0061] Furthermore, the die-cutting blade 82 can be selected as a circular die-cutting blade 822 or a flat die-cutting blade 821. The die-cutting blade 82 can be adjusted according to the OCA sheet product for precise die-cutting.

[0062] In one embodiment, such as Figure 7 As shown, the die-cutting blade 82 is a die-cutting flat blade 821. The die-cutting flat blade 821 includes a lifting plate 8211 and several die-cutting parts 8212 connected to the bottom of the lifting plate 8211. Several uprights 8213 are vertically installed on the top of the support platform 81. The lifting plate 8211 slides through the multiple uprights 8213. The third lifting assembly 83 includes a cylinder vertically installed on the support platform 81. The cylinder piston rod is fixedly connected to the top of the lifting plate 8211. When the OCA film material is transported to the top of the support platform 81 through the traction mechanism 11, the cylinder drives the piston rod to drive the lifting plate 8211 to move vertically, so that the lifting plate 8211 drives several die-cutting parts 8212 until they abut against the OCA film material, completing the die-cutting process. The operator can achieve different die-cutting effects by changing the die-cutting parts 8212 of different shapes.

[0063] In another embodiment, such as Figure 8 As shown, the die-cutting blade 82 is a circular die-cutting blade 822, which includes an upper die-cutting roller 8221 and a lower die-cutting roller 8222. The outer surface of the upper die-cutting roller 8221 is provided with a die-cutting layer 8223. A gantry frame 8224 is provided on the support platform 81. Second slide grooves 8225 are provided on both sides of the gantry frame 8224 along the height direction. A second bearing seat 8226 is slidably connected in each second slide groove 8225. The upper die-cutting roller 8221 is rotatably connected between the two second bearing seats 8226. The lower die-cutting roller 8222 is rotatably connected to the gantry frame 8224 and is located directly below the upper die-cutting roller 8221. The third lifting assembly 83 includes two cylinders vertically installed on the top of the gantry frame 8224. The two cylinders are respectively vertically installed on opposite sides of the top of the gantry frame 8224. Two cylinder piston rods are fixedly connected to the tops of two second bearing seats 8226 respectively. The support platform 81 is provided with a fifth driving component 8227 for driving the lower die-cutting roller 8222 to rotate. The fifth driving component 8227 can be a motor. When the OCA film material is conveyed between the upper die-cutting roller 8221 and the lower die-cutting roller 8222 through the traction mechanism 11, the cylinder drives the piston rod to drive the second bearing seat 8226 to descend, so that the second bearing seat 8226 drives the upper die-cutting roller 8221 to descend until it abuts the lower die-cutting roller 8222. At this time, the motor drives the lower die-cutting roller 8222 to rotate, so as to drive the upper die-cutting roller 8221 to rotate, thus completing the die-cutting of the OCA film material. The shape of the die-cutting layer 8223 can be changed according to the needs of the operator to achieve different die-cutting effects.

[0064] It should be noted that when using the die-cutting circular blade 822 for die-cutting, the operator can change the diameter of different upper die-cutting rollers 8221 according to the die-cutting requirements, so as to change the die-cutting length of several die-cutting components on the OCA film. Preferably, the diameter of the upper die-cutting roller 8221 is 10-500mm.

[0065] In actual processing, to control the defect rate of OCA processing, it is necessary to ensure the cleanliness of the OCA processing environment and reduce static electricity in the processing environment. If static electricity in the processing process cannot be effectively controlled, it may damage the release film and cause poor release. In this embodiment, the static electricity generated by the working environment with a humidity range of 55%-65% is relatively small, and the temperature is controlled within the range of 20°~25°, which makes the flow of OCA more stable and facilitates subsequent processes. Wearing cleanroom suits can reduce dust stirring and ensure the cleanliness of OCA.

[0066] This application discloses a novel OCA die-cutting process. First, the humidity of the working environment is controlled within the range of 55%~65%, and the temperature within the range of 20°~25°C. Then, release film rolls are prepared, and OCA coating and die-cutting equipment is debugged. After equipment debugging, the release film rolls are moved by the conveying mechanism 10, causing the unwinding roller 41 to rotate the release film rolls in the same direction, completing the simultaneous unwinding of the first release film 1 and the second release film 2. Then, the first release film 1 is coated by the coating mechanism 5. When the release film passes through the gap between the upper pressure roller 61 and the lower pressure roller 62, the gap width between the upper pressure roller 61 and the lower pressure roller 62 is adjusted by the first lifting component 63 and the second lifting component 64, so that the upper pressure roller 61 and the lower pressure roller 62 abut against each other, pressing the first release film 1 and the second release film 2 coated with OCA adhesive together to form a film material. Finally, the OCA film material enters the curing mechanism 7 for curing. Then, when the release film roll is output from the curing mechanism 7 to the traction mechanism 11, the OCA film is pulled to the top of the support platform 81 by the rolling contact action of the upper traction roller 1114 and the lower traction roller 1115. Before die-cutting, the distance between the first infrared sensor 92 and the second infrared sensor 93 is adjusted to the width of the OCA film. By sliding the slide table 91, the center line of the die-cutting of several sets of die-cutting components is aligned with the center line of the OCA film to ensure accurate die-cutting. Then, the die-cutting blade 82 is driven by the third lifting component 83 to die-cut the OCA film, completing the die-cutting process. This realizes the direct connection of OCA coating, OCA curing and OCA die-cutting processes, eliminating the need for winding and unwinding. This reduces the impact of winding and unwinding processes on the performance of the OCA sheet, reduces material transfer costs, and is suitable for direct production of OCA sheets with a thickness of 500-2000μm.

[0067] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A novel die-cutting process for OCA, characterized in that, Includes the following steps: S1. Unwinding and coating: Unwind the first release film (1) and the second release film (2) respectively, and coat one surface of the first release film (1); S2, Pressing and Curing: Press one side of the first release film (1) coated with the second release film (2), and then cure to obtain the OCA film material; S3. Alignment: Align the die-cutting center line of the die-cutting equipment with the center line of the OCA film material; S4. Die-cutting: The cured OCA film is die-cut to obtain OCA sheets.

2. An OCA coating and die-cutting device for the novel OCA die-cutting process described in claim 1, characterized in that, include: Chassis (3); Unwinding mechanism (4), which is located on the feeding side of the machine box (3), is used to unwind the first release film (1) and the second release film (2); The coating mechanism (5) is used to coat one surface of the first release film (1); A pressing mechanism (6) is used to press the side of the first release film (1) coated with the second release film (2); The curing mechanism (7) is used to cure the pressed OCA film material; Die-cutting mechanism (8), the die-cutting mechanism (8) is disposed on the discharge side of the chassis (3), the die-cutting mechanism (8) is used to die-cut the cured OCA film material; Alignment mechanism (9), which is connected to the die-cutting mechanism (8), is used to align the die-cutting center line of the die-cutting mechanism (8) with the center line of the OCA film material; A conveying mechanism (10) for sequentially conveying the release film roll to the coating mechanism (5), the pressing mechanism (6), the curing mechanism (7), and the die-cutting mechanism (8); The unwinding mechanism (4), the coating mechanism (5), the pressing mechanism (6), the curing mechanism (7), and the die-cutting mechanism (8) are sequentially arranged in the chassis (3).

3. The OCA coating and die-cutting equipment as described in claim 2, characterized in that: The alignment mechanism (9) includes a slide table (91), a first infrared sensor (92), a second infrared sensor (93), a controller, and a drive assembly (94). The die-cutting mechanism (8) is connected to the slide table (91). The slide table (91) is slidably disposed on the housing (3) along the width direction of the OCA film. The first infrared sensor (92) and the second infrared sensor (93) are both vertically mounted on the slide table (91). The distance to the die-cutting center line of the die-cutting mechanism (8) is the same. The controller and the drive assembly (94) are both installed in the chassis (3). The drive assembly (94), the first infrared sensor (92) and the second infrared sensor (93) are all controlled and connected to the controller. The drive assembly (94) is used to drive the slide (91) to move. The slide (91) is provided with an adjustment assembly (95) for adjusting the distance between the first infrared sensor (92) and the second infrared sensor (93).

4. The OCA coating and die-cutting equipment as described in claim 3, characterized in that: The drive assembly (94) includes at least one rodless cylinder (941), and multiple rodless cylinders (941) are mounted on the housing (3) along the width direction of the OCA membrane material. The rodless cylinders (941) are used to drive the slide (91) to move, and the controller is connected to the rodless cylinders (941).

5. An OCA coating and die-cutting device as described in claim 3, characterized in that: The drive assembly (94) includes a first screw (942) and a first drive member (943) for driving the first screw (942) to rotate. The first screw (942) is rotatably disposed on the housing (3). The first screw (942) is threaded through the slide table (91) along the width direction of the OCA film. The controller is connected to the first drive member (943).

6. The OCA coating and die-cutting equipment as described in claim 3, characterized in that: The chassis (3) is provided with at least one guide rod (96), and each guide rod (96) slides through the slide table (91) along the width direction of the OCA film material.

7. An OCA coating and die-cutting device as described in claim 2, characterized in that: The pressing mechanism (6) includes an upper pressure roller (61) and a lower pressure roller (62). The upper pressure roller (61) and the lower pressure roller (62) are rotatably mounted on the housing (3). The upper pressure roller (61) and the lower pressure roller (62) form a gap for the release film to pass through. The housing (3) is provided with a first lifting assembly (63) for driving the upper pressure roller (61) to rise and fall and a second lifting assembly (64) for driving the lower pressure roller (62) to rise and fall.

8. An OCA coating and die-cutting device as described in claim 7, characterized in that: The housing (3) is provided with a scraper (65) for abutting against the outer surface of the upper pressure roller (61) and / or the lower pressure roller (62), with the blade of the scraper (65) facing the outer surface of the upper pressure roller (61) and / or the outer surface of the lower pressure roller (62).

9. An OCA coating and die-cutting device as described in claim 2, characterized in that: The coating mechanism (5) is a roller coating mechanism (51), a spray coating mechanism (52), or a scraper coating mechanism (53); the curing mechanism (7) is a UV curing mechanism (7), a heat curing mechanism (7), or a UV photothermal curing mechanism (7).

10. An OCA coating and die-cutting device as described in claim 3, characterized in that: The die-cutting mechanism (8) includes a support platform (81) and a plurality of die-cutting components disposed on the support platform (81). The support platform (81) is fixedly connected to the slide (91). The die-cutting components include a die-cutting blade (82) and a third lifting component (83) for driving the die-cutting blade (82) to rise and fall.

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