Coating system and method for double-sided tape

Abstract

The invention discloses a coating system and method for a double-sided tape, and belongs to the technical field of surface coating. The coating system of the double-sided tape comprises an unwinding device, a first adjusting device, a first gluing device, a second gluing device, a first detecting device, a drying device, a second adjusting device, an isolating device, a forming device, a second detecting device, a winding device and a control device. The first tensioning amount and the second tensioning amount are calculated according to the unwinding speed, the glue unwinding rotating speed and the reference speed, so that base material coating is more uniform. In the tension adjusting process of the non-adhesive base material, the first tension provided by the first adjusting device and the second tension provided by the second adjusting device are calculated according to the first adjusting angle and the second adjusting angle, and then the damping torque of the isolation device is adjusted. And the damping torque changes the deformation of the release paper, so that the deformation of the release paper is consistent with that of the adhesive-free base material, and the coating of the double-sided adhesive tape is more uniform.

Description

Technical Field

[0001] The present invention relates to the technical field of surface coating, and in particular to a coating system and method for double-sided tape. Background Art

[0002] Photosensitive tape can be used for the photosensitivity of high-precision electronic components. Photosensitive tape is divided into single-sided tape and double-sided tape. Double-sided tape usually includes a base layer, two groups of dielectric layers, and two groups of release papers. Chinese Patent Publication No. CN112604911A discloses a double-sided coating device and a processing process using the double-sided coating device. The device realizes the simultaneous double-sided coating of the double-sided tape through two groups of second coating rollers. Coating stability is the core index of the tape coating quality. Chinese Patent Publication No. CN113515046A discloses a winding tension control method for a web-fed coater based on feedforward control. This method compensates for the tension disturbance amount of the current tension unit through a feedforward controller to improve the coating stability. In the photosensitive tape with a small elastic modulus, the change in the coating tension of the double-sided tape causes large and uneven deformations of the base material and the release paper. After the release paper adheres to the dielectric layer, the different deformations of the release paper and the base material cause thickness differences on both sides. Therefore, there is a need for further improvement in the prior art. Summary of the Invention

[0003] In view of the above problems, the present invention provides a coating system and method for double-sided tape, which synchronously changes the deformation of the release paper during the adjustment of the base material tension, ensures that the strain of the double-sided tape is more uniform and stable, and improves the coating quality.

[0004] The invention object of the present application can be achieved by the following technical means: A coating system for double-sided tape, comprising: A unwind device configured to store a non-adhesive base material and adjust the unwind speed of the non-adhesive base material according to the storage diameter; A first adjusting device configured to adjust the first tension amount of the non-adhesive base material; A first coating device configured to coat a first dielectric layer on the non-adhesive base material to form a single-sided adhesive base material; A second coating device configured to coat a second dielectric layer on the single-sided adhesive base material to form a double-sided adhesive base material; A first detection device configured to detect the coating parameters of the double-sided adhesive base material; A second adjusting device configured to adjust the second tension amount of the double-sided adhesive base material; An isolation device configured to attach a first release paper and a second release paper to the double-sided adhesive base material respectively; A forming device configured to press the first release paper and the second release paper onto the double-sided adhesive base material at a reference speed to form a double-sided tape; The second detection device is configured to detect the forming parameters of the double-sided tape; The winding device is configured to store the double-sided tape and adjust the winding speed of the double-sided tape according to the storage diameter; The control device is configured to adjust the glue discharging speeds of the first glue coating device and the second glue coating device based on the coating parameters, where the control device calculates the first tension amount based on the unwinding speed and the glue discharging speed, calculates the second tension amount based on the reference speed and the glue discharging speed, and controls the first adjustment angle of the first adjustment device and the second adjustment angle of the second adjustment device according to the first tension amount and the second tension amount; the control device calculates the first tension provided by the first adjustment device and the second tension provided by the second adjustment device, and adjusts the damping torque of the isolation device based on the forming parameters, the first tension, and the second tension.

[0005] In the present invention, the first glue coating device includes a glue bucket, a metering roller, a transfer roller, and a coating roller. The medium in the glue bucket is transferred to the coating roller through the gap between the metering roller and the transfer roller, and the coating roller transfers the medium to the non-glue substrate.

[0006] In the present invention, the control device calculates the glue roller transfer coefficient η(t + 1) of the first glue coating device in the (t + 1)th cycle according to the coating parameters and the glue discharging speed in the tth cycle, then calculates the glue discharging speed ω2(t + 1) according to the glue roller transfer coefficient η(t + 1), and adjusts the glue discharging speed ω2(t) of the transfer roller to the glue discharging speed ω2(t + 1).

[0007] In the present invention, the first adjustment device includes a first reversing roller, a second reversing roller, a tension roller, a telescopic device, and a cantilever. The non-glue substrate passes through the first reversing roller, the tension roller, and the second reversing roller in sequence, and the telescopic device controls the first tension amount of the non-glue substrate through the first adjustment angle of the cantilever.

[0008] In the present invention, the control device calculates the linear velocity v1(t + 1) of the non-glue substrate according to the unwinding speed ω1(t + 1) in the (t + 1)th cycle, calculates the linear velocity v2(t + 1) of the single-sided glue-attached substrate according to the glue discharging speed ω2(t + 1), calculates the speed difference and the first tension amount of the non-glue substrate, and then calculates the first adjustment angle according to the first tension amount.

[0009] In the present invention, the tension of the telescopic device of the first adjustment device is measured, the first tension provided by the first adjustment device is calculated according to the tension of the telescopic device and the first adjustment angle, the tension of the telescopic device of the second adjustment device is measured, and the second tension provided by the second adjustment device is calculated according to the tension of the telescopic device and the second adjustment angle.

[0010] In the present invention, the isolation device includes a first isolation roller and a second isolation roller. The storage diameters of the first isolation roller and the second isolation roller are measured. The first deformation ratio is calculated based on the molding parameters. The second deformation ratio is calculated based on the first tension and the second tension. The deformation adjustment amount of the first release paper or the second release paper is calculated according to the first deformation ratio and the second deformation ratio. Then, the damping torque of the first isolation roller or the second isolation roller in the isolation device is calculated according to the deformation adjustment amount and the storage diameter of the first isolation roller or the second isolation roller.

[0011] In the present invention, the molding parameters include the coating thickness of the first release paper and the coating thickness of the second release paper. The second detection device includes an image acquisition unit, an image analysis unit, and a template storage unit. The image acquisition unit is used to obtain the characteristic image of the double-sided tape. The template storage unit is used to store the template image of the double-sided tape. The image analysis unit predicts the molding parameters according to the characteristic image and the template image.

[0012] In the present invention, it further includes a drying device configured to dry the first dielectric layer and the second dielectric layer. The reference speed of the molding device is calculated according to the working length of the drying device.

[0013] A coating method according to the coating system of the double-sided tape includes the following steps: Step 1: Adjust the unwinding speed and the first tension amount of the non-adhesive substrate. Step 2: After coating the first dielectric layer on the non-adhesive substrate, a single-sided adhesive substrate is formed. After coating the second dielectric layer on the single-sided adhesive substrate, a double-sided adhesive substrate is formed. Step 3: Detect the coating parameters of the double-sided adhesive substrate and adjust the second tension amount of the double-sided adhesive substrate. Step 4: Attach the first release paper and the second release paper to the double-sided adhesive substrate respectively, and press the first release paper and the second release paper on the double-sided adhesive substrate at the reference speed to form a double-sided tape. Step 5: Detect the molding parameters of the double-sided tape and adjust the winding speed of the double-sided tape. Step 6: Adjust the glue release rotation speed based on the coating parameters. Step 7: Calculate the first tension amount and the second tension amount, and control the first adjustment angle of the first adjustment device and the second adjustment angle of the second adjustment device. Step 8: Adjust the damping torque of the isolation device based on the molding parameters, the first tension, and the second tension, and return to Step 1.

[0014] The coating system and method of the double-sided tape of the present invention have the beneficial effects that: according to the unwinding speed, the glue discharging rotation speed, and the reference speed, the present invention calculates the first tension amount and the second tension amount, making the coating of the base material more uniform. During the adjustment of the base material tension, according to the first adjustment angle and the second adjustment angle, the first tension provided by the first adjustment device and the second tension provided by the second adjustment device are calculated, and then the damping torque of the isolation device is adjusted. The damping torque changes the deformation of the release paper, making the deformation of the release paper consistent with that of the non-glue base material, so that the coating of the double-sided tape is more uniform. Further, in view of the change in the tension direction of the first adjustment device and the second adjustment device during the working process, the tension of the extensometers of the first adjustment device and the second adjustment device is measured in real time, and combined with the displacement of the tension roller, the first tension and the second tension are calculated, which can more accurately estimate the deformation amount of the non-glue base material, reduce the deformation difference after the release paper and the base material are attached, and further improve the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a double-sided tape; Figure 2 It is a schematic diagram of the forming process of the double-sided tape of the present invention; Figure 3 It is a schematic diagram of the coating system of the double-sided tape of the present invention; Figure 4 It is a schematic diagram of the movement of the unwinding device, the first adjustment device, the first coating device and the second coating device of the present invention; Figure 5 It is a schematic cross-sectional view of the double-sided adhesive base material collected by the first detection device of the present invention; Figure 6 It is a schematic diagram of the movement of the second adjustment device, the isolation device, the forming device and the winding device of the present invention; Figure 7 It is a block diagram of the second detection device of the present invention; Figure 8 It is a schematic cross-sectional view of the double-sided tape collected by the second detection device of the present invention; Figure 9 It is a schematic diagram of calculating the damping torque of the present invention; Figure 10 It is a schematic diagram of the first adjustment device adjusting the first tension amount of the present invention; Figure 11 It is a schematic diagram of the geometric relationship of the first adjustment device of the present invention; Figure 12 It is a schematic diagram of the working state of the first isolation roller of the present invention; Figure 13 It is a schematic diagram of the working state of the second isolation roller of the present invention; Figure 14 It is a schematic diagram of the structure of the first isolation roller of the present invention; Figure 15 This is a flowchart of the coating method according to the coating system of the double-sided tape of the present invention.

[0016] Reference numerals in the drawings: double-sided tape 10, non-adhesive substrate 11, first dielectric layer 12, second dielectric layer 13, first release paper 14, second release paper 15, unwind device 21, first adjusting device 22, first coating device 23, second coating device 24, first detection device 25, drying device 26, second adjusting device 27, isolation device 28, second detection device 29, forming device 31, winding device 32, control device 33, system bus 34, first isolation roller 41, second isolation roller 42, rubber wheel 43, mandrel 44, rotor 45, stator 46, coil 47, magnetic powder 48, first reversing roller 51, second reversing roller 52, tension roller 53, expander 54, cantilever 55. Detailed implementation manners

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] As Figure 1 shown, the double-sided tape 10 mainly consists of a non-adhesive substrate 11, a first dielectric layer 12, a second dielectric layer 13, a first release paper 14 and a second release paper 15. To ensure the uniform thickness of each layer, the unwind speed, the glue application rotation speed, and the reference speed are periodically monitored, and the first tension amount and the second tension amount in the next cycle are calculated. The cycle duration τ is, for example, 0.5 to 2 seconds. In the process of adjusting the substrate tension in the present invention, the first tension provided by the first adjusting device and the second tension provided by the second adjusting device are calculated, and then the damping torque of the isolation device is adjusted. The damping torque changes the deformation of the release paper, making the coating of the double-sided tape 10 more uniform. Embodiment 1

[0019] As Figures 1 to 14 shown, the coating system of the double-sided tape 10 of the present invention includes: an unwind device 21, a first adjusting device 22, a first coating device 23, a second coating device 24, a first detection device 25, a drying device 26, a second adjusting device 27, an isolation device 28, a forming device 31, a second detection device 29, a winding device 32, and a control device 33. The control device 33 is the control center of the coating system of the double-sided tape 10, and is used to control the working states of each device. The control device 33 is respectively connected to the unwind device 21, the first adjusting device 22, the first coating device 23, the second coating device 24, the first detection device 25, the drying device 26, the second adjusting device 27, the isolation device 28, the forming device 31, the second detection device 29, and the winding device 32 through the system bus 34. Each device can be configured with a PID controller to achieve speed feedback control.

[0020] The unwinding device 21 is configured to store the non-adhesive substrate 11, and as the coating system operates, the non-adhesive substrate 11 gradually decreases. The unwinding device 21 has a sensing unit for measuring the storage diameter of the non-adhesive substrate 11. The unwinding speed is the angular velocity, and the unwinding speed is calculated according to the linear velocity required by the non-adhesive substrate 11. The unwinding speed of the non-adhesive substrate 11 is adjusted in real time to avoid affecting the linear velocity of the non-adhesive substrate 11 due to changes in the storage diameter. The calculation method of the unwinding speed is not described in detail in the present invention.

[0021] The first adjusting device 22 is configured to adjust the first tension amount of the non-adhesive substrate 11. The first adjusting device 22 includes a first reversing roller 51, a second reversing roller 52, a tension roller 53, a telescopic device 54, and a cantilever 55. The non-adhesive substrate 11 passes through the first reversing roller 51, the tension roller 53, and the second reversing roller 52 in sequence, and the telescopic device 54 controls the first tension amount of the non-adhesive substrate 11 through the first adjustment angle of the cantilever 55.

[0022] The first coating device 23 is configured to coat the first medium layer 12 on the non-adhesive substrate 11 to form a single-sided adhesive substrate. Refer to Figure 4 , the first coating device 23 includes a glue bucket, a metering roller, a transfer roller, and a coating roller. The medium in the glue bucket is transferred to the coating roller through the gap between the metering roller and the transfer roller, and the coating roller transfers the medium to the non-adhesive substrate 11. The medium of the present invention is, for example, acrylate resin, azobenzene, etc.

[0023] The second coating device 24 is configured to coat the second medium layer 13 on the single-sided adhesive substrate to form a double-sided adhesive substrate. The structure of the second coating device 24 is the same as that of the first coating device 23, but the coating direction is opposite to that of the first coating device 23.

[0024] The first detection device 25 is configured to detect the coating parameters of the double-sided adhesive substrate. The coating parameters in this embodiment include the coating thicknesses of the first medium layer 12 and the second medium layer 13. The first detection device 25, for example, uses an infrared measurement unit to measure the coating thicknesses of the first medium layer 12 and the second medium layer 13.

[0025] The drying device 26 is configured to dry the first medium layer 12 and the second medium layer 13. The reference speed of the forming device 31 is calculated according to the working length and drying duration of the drying device 26. The forming device 31 pulls the double-sided adhesive substrate at this reference speed to ensure the drying duration. The diameter of the pressing roller of the forming device 31 remains unchanged, and the linear velocity of the double-sided adhesive substrate is controlled with reference to the forming device 31, which is more conducive to uniform coating.

[0026] The second adjusting device 27 is configured to adjust the second tension amount of the double-sided adhesive substrate. The structure of the second adjusting device 27 is the same as that of the first adjusting device 22. The adjustment processes of the first adjusting device 22 and the second adjusting device 27 refer to those described in Embodiment 2.

[0027] The separating device 28 is configured to attach the double-sided adhesive substrate to the first release paper 14 and the second release paper 15 respectively. The separating device 28 includes a first separating roller 41 and a second separating roller 42. Measure the storage diameters of the first separating roller 41 and the second separating roller 42, calculate the first deformation ratio based on the forming parameters, and calculate the second deformation ratio based on the first tension and the second tension. Calculate the deformation adjustment amount of the first release paper 14 or the second release paper 15 according to the first deformation ratio and the second deformation ratio, and then calculate the damping torque of the first separating roller 41 or the second separating roller 42 in the separating device 28 according to the deformation adjustment amount and the storage diameter of the first separating roller 41 or the second separating roller 42.

[0028] The forming device 31 is configured to press the first release paper 14 and the second release paper 15 onto the double-sided adhesive substrate at a reference speed to form the double-sided tape 10. The forming device 31 is composed of at least two sets of rollers with fixed dimensions. In a further embodiment, the reference speed of the forming device 31 is the reference for the working speed of the coating system, and the corresponding linear speed can be calculated by combining the reference speed of the forming device 31 and the roller diameter of the forming device 31. In order to reduce the deformation of the non-adhesive substrate 11, in a preferred case, this linear speed is matched with the linear speed of the non-adhesive substrate 11 and the linear speed of the double-sided tape 10.

[0029] The second detection device 29 is configured to detect the forming parameters of the double-sided tape 10. The forming parameter is the coating thickness of the first release paper 14 or the second release paper 15. As Figure 7 , the second detection device 29 includes an image acquisition unit, an image analysis unit, and a template storage unit. The image acquisition unit is used to obtain the characteristic image of the double-sided tape 10, the template storage unit is used to store the template image of the double-sided tape 10, and the image analysis unit predicts the pixel width of the release paper according to the characteristic image and the template image, so as to calculate the coating thickness.

[0030] The winding device 32 is configured to store the double-sided tape 10, and as the coating system works, the double-sided tape 10 gradually increases. The winding device 32 has a sensing unit for measuring the storage diameter of the double-sided tape 10. Calculate the winding speed according to the required linear speed of the double-sided tape 10 and the storage diameter of the double-sided tape 10. Adjust the winding speed of the double-sided tape 10 in real time to avoid affecting the linear speed of the double-sided tape 10 due to the change of the storage diameter. The calculation method of the winding speed is not described in detail in this embodiment.

[0031] The control device 33 adjusts the glue discharging rotation speeds of the first glue applying device 23 and the second glue applying device 24 based on the coating parameters. For the current cycle t, the control device 33 calculates the roller transfer coefficient η(t + 1) of the first glue applying device 23 in the (t + 1) - th cycle according to the coating parameters and the glue discharging rotation speed in the t - th cycle, and then calculates the glue discharging rotation speed ω2(t + 1) according to the roller transfer coefficient η(t + 1), and adjusts the glue discharging rotation speed ω2(t) of the transfer roller to the glue discharging rotation speed ω2(t + 1). In this embodiment, in the coating parameters of the t - th cycle, the coating thickness of the first dielectric layer 12 is H1, and H1 = η(t)ω2(t)H0, where H0 is the gap between the metering roller and the transfer roller. The larger the gap, the larger the glue discharging rotation speed, the larger the roller transfer coefficient, and the larger the coating thickness. For the same transfer roller and metering roller, the roller transfer coefficient of the same batch of media remains unchanged, that is, η(t)=η(t + 1). Therefore, the standard coating thickness H2 = η(t + 1)ω2(t + 1)H0, so ω2(t + 1)=H2ω2(t) / H1. Calculate the glue discharging rotation speed ω2(t + 1) in the (t + 1) - th cycle according to the coating parameters and the glue discharging rotation speed in the t - th cycle.

[0032] The control device 33 calculates the first tension amount based on the unwinding speed and the glue discharging rotation speed, calculates the second tension amount based on the reference speed and the glue discharging rotation speed, and controls the first adjustment angle of the first adjustment device 22 and the second adjustment angle of the second adjustment device 27 according to the first tension amount and the second tension amount. Specifically, the control device 33 calculates the linear speed v1(t + 1) of the non - adhesive substrate 11 according to the unwinding speed ω1(t + 1) in the (t + 1) - th cycle, and calculates the linear speed v2(t + 1) of the single - sided glue - attached substrate according to the glue discharging rotation speed ω2(t + 1). Calculate the speed difference v1(t + 1)-v2(t + 1) of the non - adhesive substrate 11. For the cycle duration τ, the first tension amount is [v1(t + 1)-v2(t + 1)]τ. Then calculate the first adjustment angle of the first adjustment device 22 according to the first tension amount. The change of the first adjustment angle drives the height change of the tension roller, and then adjusts the first tension amount. Details are described in detail with reference to Embodiment 2.

[0033] The control device 33 calculates the first tension provided by the first adjustment device 22 and the second tension provided by the second adjustment device 27, and adjusts the damping torque of the isolation device 28 based on the forming parameters, the first tension and the second tension. Due to the lever effect of the cantilever, the first tension provided by the first adjustment device 22 is the component force of the tension of the telescopic device along the moving direction of the non - adhesive substrate 11. Specifically, the present invention measures the tension of the telescopic device of the first adjustment device 22, and calculates the first tension provided by the first adjustment device 22 according to the tension of the telescopic device and the first adjustment angle. Measure the tension of the telescopic device of the second adjustment device 27, and calculate the second tension provided by the second adjustment device 27 according to the tension of the telescopic device and the second adjustment angle. Details are described in detail with reference to Embodiment 3. Embodiment 2

[0034] This embodiment further discloses a preferred method for calculating the first adjustment angle, the second adjustment angle, the first tension, and the second tension.

[0035] First, calculate the first tension amount in the (t + 1) - th cycle. For the storage diameter R1 of the non - adhesive substrate, the unwind speed ω1(t + 1) corresponds to the linear speed v1(t + 1) of the non - adhesive substrate, v1(t + 1)=ω1(t + 1)R1. For the diameter R3 of the transfer roller, the glue - applying rotation speed ω2(t + 1) corresponds to the linear speed v2(t + 1) of the single - sided adhesive - attached substrate, v2(t + 1)=ω2(t + 1)R3. Calculate the speed difference of the non - adhesive substrate ω1(t + 1)R1−ω2(t + 1)R3. For a relatively small cycle duration τ, the speed difference is regarded as a constant value, and the first tension amount S1 = [ω1(t + 1)R1−ω2(t + 1)R3]τ. By the same method, the linear speed v3 of the double - sided adhesive tape can be calculated, and the second tension amount=(v2 - v3)τ=[ω2(t + 1)R3−ω3(t + 1)R4]τ can be calculated. Where ω3(t + 1) is the reference speed in the (t + 1) - th cycle, and R4 is the diameter of the pressure roller of the forming device.

[0036] Then, calculate the target first adjustment angle θ(t + 1) in the (t + 1) - th cycle. In this embodiment, for the sake of convenience of expression, let the target first adjustment angle θ(t + 1)=θ', and let the current first adjustment angle θ(t)=θ. Substitute the current first adjustment angle θ into the functional relationship between the total tension amount and the first adjustment angle to obtain the current total tension amount S0, and then obtain the target total tension amount S0' = S0+S1. Then substitute the target total tension amount into the functional relationship between the total tension amount and the first adjustment angle to calculate the target first adjustment angle θ' of the first adjustment device.

[0037] In this embodiment, the functional relationship between the total tension amount and the first adjustment angle is further given. Combining Figure 10 , the current total tension amount S0 = L 11 −L0 + L 21 −L0, L 11 is the tension amount between the first reversing roller and the tension roller, and L 21 is the tension amount between the second reversing roller and the tension roller. In the initial state (the first adjustment angle is zero), the vertical distance between the first reversing roller and the tension roller is L0. The radii of the first reversing roller, the second reversing roller, and the tension roller are all R2, , . Where the center - to - center distance between the first reversing roller and the tension roller , the center - to - center distance between the second reversing roller and the tension roller , and L3 is the length between the hinge point of the tension roller and the hinge point of the cantilever, that is, the effective length of the cantilever. That is, the functional relationship can be expressed as: for the current first adjustment angle θ, the current total tension amount . Similarly, for the target first adjustment angle θ', the target total tension amount .

[0038] Calculate the first tension F of the first adjusting device in the t+1 cycle again 11 and the second tension F of the second adjusting device 12 . After completing the control of the first adjustment angle and the second adjustment angle, the tension of the telescopic device changes. Measure the tension F of the telescopic device of the first adjusting device 13 . According to the pulley force principle, the angles between the first tension or the second tension and the center line of the first adjusting device are equal, both set as α1. The tension applied by the tension roller to the cantilever is 2F 11 cosα1. The telescopic device and the tension roller form a lever mechanism. According to the balance relationship of the cantilever, sinα2(2cosα1F 11 )×L3 = F 13 cosθ'×L4, the first tension F can be calculated 11 , where L3 is the length between the hinge point of the tension roller and the hinge point of the cantilever, L4 is the length between the hinge point of the telescopic device and the hinge point of the cantilever, and α2 is the deflection angle of the tension roller. The second tension F can be calculated in the same way 12 .

[0039] α1 and α2 of the present invention are gradually adjusted as the cantilever swings. In this embodiment, a calculation method for α1 and α2 is further given. Combining Figure 11 , the angle between the tangent foot of the tension roller and the connection line of the first center is β1, the angle between the connection line of the first center and the perpendicular bisector is β2, the angle between the perpendicular bisector and the center line is β3, and α1 = π / 2 - (β1 + β2 + β3). Among them, β1 = arccos(2R2 / L 12 ). The initial horizontal distance between the tension roller and the first reversing roller is 2R2, and the horizontal distance variable at the current first adjustment angle θ is sinθtanθL4. β2 = arcsin[(2R2 - sinθtanθL3) / L 12 . The vertical distance between the tension roller and the first reversing roller at the current first adjustment angle θ is L0 + cosθtanθL4, and β3 = arctan[(sinθtanθL3) / (L0 + cosθtanθL3)]. The angle between the center line and the horizontal axis is the deflection angle α2 of the tension roller. In the initial state, the deflection angle α2 of the tension roller is 0, and α1 = π / 2. Therefore, at the current first adjustment angle θ, α2 = π / 2 - β3 = π / 2 - arctan[(sinθtanθL3) / (L0 + cosθtanθL3)]. Embodiment III

[0040] This embodiment further discloses a preferred method for calculating and adjusting the damping torque of the isolation device. The isolation device includes a first isolation roller and a second isolation roller. The first isolation roller is used to attach the first release paper, and the second isolation roller is used to attach the second release paper

[0041] Calculate the first deformation ratio based on the forming parameters. The first deformation ratio refers to the deformation of the current release paper. The forming parameters include the coating thickness of the first release paper and the coating thickness of the second release paper. For example Figure 8 , it is measured that the average coating thickness of the first release paper within the length y1 of the first isolation roller is x1. Compare the average coating thickness x1 of the first release paper with the reference coating thickness x0. The first deformation ratio σ0 before and after coating the first release paper is σ0 = y1(x0 - x1) / x0y1 = (x0 - x1) / x0.

[0042] Calculate the second deformation ratio based on the first tension and the second tension. The second deformation ratio refers to the deformation of the double-sided adhesive substrate. Usually within the measurement range, the double-sided adhesive substrate is elastically deformed. The second deformation ratio σ1 = ΔL / L = [F 11 L / (A1E1)] / L = F 11 / (A1E1). Wherein, L is the distance between the isolation device and the forming device. A1 is the cross-sectional area of the double-sided adhesive substrate, usually taking 0.1 - 3 mm 2 . E1 is the elastic modulus of the double-sided adhesive substrate, usually taking 0.1 - 0.8 GPa. Combining with Example 2, σ1 = F 13 cosθ'×L4 / [2sinα2cosα1L3A1E1]. Calculate the deformation adjustment amount of the first release paper or the second release paper according to the first deformation ratio and the second deformation ratio. Through this deformation adjustment amount, the deformation of the release paper is adjusted to the second deformation ratio. The deformation adjustment amount σ2 = σ1 - σ0.

[0043] Refer to Figure 12 and Figure 13 , as the release paper is used, the storage diameter gradually decreases. Measure the storage diameter R5 of the first release paper in the first isolation roller and the storage diameter of the second release paper in the second isolation roller by methods such as image detection and coding counter. Calculate the damping torque of the first isolation roller or the second isolation roller in the isolation device. The damping force F 21 of the first isolation roller = σ2A2E2, where A2 is the cross-sectional area of the first release paper or the second release paper, usually taking 0.02 - 0.5 mm 2 . E2 is the elastic modulus of the first release paper or the second release paper, usually taking 0.5 - 2 GPa. Therefore, the damping torque M1 of the first isolation roller = F 21 R5. The damping force F 22 of the second isolation roller and the damping torque M2 = F 22 R5 can be obtained by the same method.

[0044] Refer to Figure 14, the first isolation roller 41 includes a rubber wheel 43, a mandrel 44, a rotor 45, a stator 46, a coil 47, magnetic powder 48, a power supply, and a current controller. The rotor 45 is fixed inside the rubber wheel 43, the stator 46 is fixed outside the mandrel 44, and the mandrel 44 is rotatably installed on a bracket (not shown) of the coating system. The coil 47 is embedded in an annular groove inside the stator 46, a magnetic gap is provided between the stator 46 and the rotor 45, and the magnetic powder 48 is distributed in the magnetic gap. The power supply is connected to the coil 47 through the current controller. The current controller adjusts the excitation current of the power supply and the coil 47, thereby adjusting the damping torque. More specifically, the excitation current I = M1 / K = σ2A2E2R5 / K, and the torque constant K is related to the magnetic powder characteristics and the gap design. Example 4

[0045] Refer to Figure 15 , a coating method for a coating system according to the double-sided adhesive tape of the present invention, with an interval period duration τ, measuring the coating parameters and forming parameters of the measuring period t, and generating the tension amount of the adjusting device and the damping torque of the isolation device of the period t + 1 to improve the coating stability. The coating method includes the following steps.

[0046] Initialize the system parameters, preset the first tension amount and the second tension amount, and preset the period t = 0.

[0047] Step 1: Adjust the unwinding speed of the non-adhesive substrate and the first tension amount.

[0048] Step 2: After coating the first dielectric layer on the non-adhesive substrate, a single-sided adhesive substrate is made, and after coating the second dielectric layer on the single-sided adhesive substrate, a double-sided adhesive substrate is made.

[0049] Step 3: Detect the coating parameters of the double-sided adhesive substrate and adjust the second tension amount of the double-sided adhesive substrate.

[0050] Step 4: Attach the first release paper and the second release paper to the double-sided adhesive substrate respectively, and press the first release paper and the second release paper on the double-sided adhesive substrate at the reference speed to make a double-sided adhesive tape.

[0051] Step 5: Detect the forming parameters of the double-sided adhesive tape and adjust the winding speed of the double-sided adhesive tape.

[0052] Step 6: Adjust the glue feeding rotation speed based on the coating parameters.

[0053] Step 7: Calculate the first tension amount and the second tension amount, and control the first adjustment angle of the first adjustment device and the second adjustment angle of the second adjustment device.

[0054] Step 8: Adjust the damping torque of the isolation device based on the forming parameters, the first tension, and the second tension, t = t + 1, and return to Step 1.

[0055] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A double-sided tape coating system, characterized in that: include: an unwinding device configured to store the adhesive-free substrate and adjust the unwinding speed of the adhesive-free substrate according to the storage diameter; a first adjusting device configured to adjust a first tensioning amount of the adhesive-free substrate; A first adhesive coating device is configured to form a single-sided adhesive-coated substrate after coating the first dielectric layer on the adhesive-free substrate; The second adhesive coating device is configured to coat the second dielectric layer on the single-sided adhesive substrate to form a double-sided adhesive substrate; A first detection device is configured to detect coating parameters of a double-sided adhesive substrate; A second adjusting device is configured to adjust a second tensioning amount of the double-sided adhesive substrate; An isolation device is configured to attach a first release paper and a second release paper to the double-sided adhesive substrate respectively; A forming device is configured to press the first release paper and the second release paper onto the double-sided adhesive substrate at a reference speed to form a double-sided adhesive tape; A second detection device is configured to detect molding parameters of the double-sided tape; A winding device is configured to store the double-sided tape and adjust the winding speed of the double-sided tape according to the storage diameter; The control device is configured to adjust the glue release speeds of the first glue coating device and the second glue coating device based on the coating parameters, wherein: The control device calculates a first tensioning amount based on the unwinding speed and the glue releasing speed, calculates a second tensioning amount based on the reference speed and the glue releasing speed, and controls a first adjustment angle of the first adjustment device and a second adjustment angle of the second adjustment device according to the first tensioning amount and the second tensioning amount. The control device calculates a first tension provided by the first adjusting device and a second tension provided by the second adjusting device, and adjusts the damping torque of the isolation device based on the molding parameters, the first tension and the second tension.

2. The double-sided tape coating system according to claim 1, characterized in that: The first glue coating device includes a glue barrel, a metering roller, a transfer roller, and a coating roller. The medium in the glue barrel is transferred to the coating roller through the gap between the metering roller and the transfer roller, and the coating roller transfers the medium to the glue-free substrate.

3. The double-sided tape coating system according to claim 2, characterized in that: The control device calculates the glue roller transfer coefficient η(t+1) of the first glue coating device in the t+1 period according to the coating parameters of the t period and the glue release speed, and then calculates the glue release speed ω2(t+1) according to the glue roller transfer coefficient η(t+1), and adjusts the glue release speed ω2(t) of the transfer roller to the glue release speed ω2(t+1).

4. The double-sided tape coating system according to claim 1, characterized in that: The first adjustment device includes a first reversing roller, a second reversing roller, a tension roller, a telescope and a cantilever. The non-glue substrate passes through the first reversing roller, the tension roller and the second reversing roller in sequence. The telescope controls the first tensioning amount of the non-glue substrate through the first adjustment angle of the cantilever.

5. The double-sided tape coating system according to claim 4, characterized in that: The control device calculates the linear speed v1(t+1) of the non-glue substrate according to the unwinding speed ω1(t+1) of the t+1 period, calculates the linear speed v2(t+1) of the single-sided glue-attached substrate according to the glue unwinding speed ω2(t+1), calculates the speed difference and the first tensioning amount of the non-glue substrate, and then calculates the first adjustment angle according to the first tensioning amount.

6. The double-sided tape coating system according to claim 5, characterized in that: The tension of the telescope of the first adjusting device is measured, and the first tension provided by the first adjusting device is calculated according to the tension of the telescope and the first adjustment angle; the tension of the telescope of the second adjusting device is measured, and the second tension provided by the second adjusting device is calculated according to the tension of the telescope and the second adjustment angle.

7. The double-sided tape coating system according to claim 6, characterized in that: The isolation device includes a first isolation roller and a second isolation roller, the stored diameters of the first isolation roller and the second isolation roller are measured, the first deformation ratio is calculated based on the forming parameters, the second deformation ratio is calculated based on the first tension and the second tension, the deformation adjustment amount of the first release paper or the second release paper is calculated according to the first deformation ratio and the second deformation ratio, and then the damping torque of the first isolation roller or the second isolation roller in the isolation device is calculated according to the deformation adjustment amount and the stored diameter of the first isolation roller or the second isolation roller.

8. The double-sided tape coating system according to claim 1, characterized in that: The forming parameters include the coating thickness of the first release paper and the coating thickness of the second release paper. The second detection device includes an image acquisition unit, an image analysis unit and a template storage unit. The image acquisition unit is used to obtain the characteristic image of the double-sided tape, the template storage unit is used to store the template image of the double-sided tape, and the image analysis unit predicts the forming parameters based on the characteristic image and the template image.

9. The double-sided tape coating system according to claim 1, characterized in that: The invention also includes a drying device configured to dry the first medium layer and the second medium layer, and the reference speed of the forming device is calculated according to the working length of the drying device.

10. A coating method of the double-sided tape coating system according to claim 1, characterized in that: The following steps are involved: Step 1: Adjust the unwinding speed and the first tensioning amount of the adhesive-free substrate; Step 2: coating the first dielectric layer on the adhesive-free substrate to prepare a single-sided adhesive substrate, and coating the second dielectric layer on the single-sided adhesive substrate to prepare a double-sided adhesive substrate; Step 3: Detect coating parameters of the double-sided adhesive substrate and adjust the second tensioning amount of the double-sided adhesive substrate; Step 4: attaching the first release paper and the second release paper to the double-sided adhesive substrate respectively, and pressing the first release paper and the second release paper to the double-sided adhesive substrate at a reference speed to form a double-sided adhesive tape; Step 5: Detect the molding parameters of the double-sided tape and adjust the winding speed of the double-sided tape; Step 6: adjusting the glue dispensing speed based on the coating parameters; Step 7: Calculate the first tension amount and the second tension amount, and control the first adjustment angle of the first adjustment device and the second adjustment angle of the second adjustment device; Step 8: Adjust the damping torque of the isolation device based on the molding parameters, the first tension and the second tension, and return to step 1.

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