Double-sided tape coating system and method

Abstract

The present invention discloses a coating system and method for a double-sided tape, and belongs to the field of surface coating technology. The coating system for the double-sided tape of the present invention 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 present invention calculates the first tension and the second tension according to the unwinding speed, the gluing rotation speed, and the reference speed, so that the coating of the substrate is more uniform. In the tension adjustment process of the non-glue substrate, 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 adjustment angle and the second adjustment angle, and then the damping torque of the isolation device is adjusted. The damping torque changes the deformation of the release paper, so that the deformation of the release paper is consistent with that of the non-glue substrate, so that the coating of the double-sided 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 a double-sided adhesive tape. Background Art

[0002] Photosensitive tape can be used for the photosensitization of high-precision electronic components. Photosensitive tape is divided into single-sided tape and double-sided tape. Double-sided tape usually contains a base layer, two sets of dielectric layers and two sets of release paper. Chinese Patent Publication No. CN112604911A discloses a double-sided coating device and a processing technology using a double-sided coating device. The device uses two sets of second coating rollers to achieve simultaneous coating of both sides of the double-sided tape. Coating stability is a core indicator of tape coating quality. Chinese Patent Publication No. CN113515046A discloses a roll coating machine winding tension control method based on feedforward control. The method compensates for the tension disturbance of the current tension unit through a feedforward controller to improve coating stability. In photosensitive tapes with a small elastic modulus, the change in the coating tension of the double-sided tape causes the deformation of the substrate and the release paper to be large and uneven. After the release paper is attached to the dielectric layer, the different deformations of the release paper and the substrate cause thickness differences on both sides. Therefore, the existing technology needs further improvement. Summary of the Invention

[0003] In response to the above problems, the present invention provides a double-sided tape coating system and method, which synchronously changes the deformation of the release paper during the substrate tension adjustment process to ensure that the strain of the double-sided tape is more uniform and stable, thereby improving the coating quality.

[0004] The invention objectives of this application can be achieved through the following technical means:

[0005] A double-sided adhesive tape coating system comprising:

[0006] an unwinding device configured to store the adhesive-free substrate and adjust an unwinding speed of the adhesive-free substrate according to a storage diameter;

[0007] a first adjusting device configured to adjust a first tensioning amount of the adhesive-free substrate;

[0008] The first adhesive coating device is configured to coat the adhesive-free substrate with the first dielectric layer to produce a single-sided adhesive-coated substrate;

[0009] The second adhesive coating device is configured to coat the single-sided adhesive substrate with a second dielectric layer to produce a double-sided adhesive substrate;

[0010] A first detection device is configured to detect coating parameters of a double-sided adhesive substrate;

[0011] a second adjusting device configured to adjust a second tensioning amount of the double-sided adhesive substrate;

[0012] An isolation device is configured to attach a first release paper and a second release paper to the double-sided adhesive substrate respectively;

[0013] a forming device 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;

[0014] a second detection device configured to detect molding parameters of the double-sided tape;

[0015] a winding device configured to store the double-sided tape and adjust the winding speed of the double-sided tape according to the storage diameter;

[0016] The control device is configured to adjust the glue dispensing speed of the first glue coating device and the second glue coating device based on the coating parameters, wherein:

[0017] The control device calculates a first tension based on the unwinding speed and the glue releasing speed, calculates a second tension 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 tension and the second tension.

[0018] 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 forming parameters, the first tension and the second tension.

[0019] In the present invention, the first gluing 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 non-glue substrate.

[0020] 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 period based on the coating parameters and the glue release speed of the t period, and then calculates the glue release speed ω2(t+1) based on 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).

[0021] In the present invention, the first adjustment device includes a first reversing roller, a second reversing roller, a tension roller, a telescoping device and a cantilever. The non-glue substrate passes through the first reversing roller, the tension roller and the second reversing roller in sequence. The telescoping device controls the first tensioning amount of the non-glue substrate through the first adjustment angle of the cantilever.

[0022] In the present invention, the control device calculates the linear speed v1(t+1) of the non-glue substrate based on the unwinding speed ω1(t+1) of the t+1 cycle, calculates the linear speed v2(t+1) of the single-sided glue-attached substrate based on the glue unwinding speed ω2(t+1), calculates the speed difference of the non-glue substrate and the first tensioning amount, and then calculates the first adjustment angle based on the first tensioning amount.

[0023] In the present invention, the tension of the telescopic device of the first adjusting device is measured, and the first tension provided by the first adjusting device is calculated based on the tension of the telescopic device and the first adjustment angle; the tension of the telescopic device of the second adjusting device is measured, and the second tension provided by the second adjusting device is calculated based on the tension of the telescopic device and the second adjustment angle.

[0024] In the present invention, 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 based on the first deformation ratio and the second deformation ratio, and the damping torque of the first isolation roller or the second isolation roller in the isolation device is calculated based on the deformation adjustment amount and the stored diameter of the first isolation roller or the second isolation roller.

[0025] In the present invention, 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.

[0026] The present invention further 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.

[0027] A coating method according to the coating system of the double-sided adhesive tape comprises the following steps:

[0028] Step 1: Adjust the unwinding speed and the first tension of the non-glue substrate;

[0029] Step 2: coating the adhesive-free substrate with a first dielectric layer to produce a single-sided adhesive substrate, and coating the single-sided adhesive substrate with a second dielectric layer to produce a double-sided adhesive substrate;

[0030] Step 3: Detect the coating parameters of the double-sided adhesive substrate and adjust the second tension of the double-sided adhesive substrate;

[0031] Step 4: Attaching a first release paper and a second release paper to the double-sided adhesive substrate respectively, and pressing 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;

[0032] Step 5: Check the forming parameters of the double-sided tape and adjust the winding speed of the double-sided tape;

[0033] Step 6: Adjusting the glue dispensing speed based on the coating parameters;

[0034] 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;

[0035] 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.

[0036] The beneficial effects of the double-sided tape coating system and method of the present invention are as follows: the present invention calculates the first tension and the second tension according to the unwinding speed, the glue unwinding speed, and the reference speed, so that the substrate coating is more uniform. During the substrate tension adjustment process, the first tension provided by the first adjustment device and the second tension provided by the second adjustment device are calculated according to the first adjustment angle and the second adjustment angle, and then the damping torque of the isolation device is adjusted. The damping torque changes the deformation of the release paper so that the deformation of the release paper is consistent with that of the non-glue substrate, so that the coating of the double-sided tape is more uniform. Furthermore, in response to the change in the tension direction of the first adjustment device and the second adjustment device during operation, the tension of the telescopic device of the first adjustment device and the second adjustment device is measured in real time, and the first tension and the second tension are calculated in combination with the displacement of the tension roller. This can more accurately estimate the deformation of the non-glue substrate, reduce the deformation difference between the release paper and the substrate after attachment, and further improve the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 is a schematic diagram of a double-sided tape;

[0038] Figure 2 Schematic diagram of the molding process of the double-sided adhesive tape of the present invention;

[0039] Figure 3 Schematic diagram of a coating system for a double-sided adhesive tape of the present invention;

[0040] Figure 4 A schematic diagram of the movement of the unwinding device, the first adjusting device, the first coating device, and the second coating device of the present invention;

[0041] Figure 5 This is a schematic cross-sectional view of a double-sided adhesive substrate captured by the first detection device of the present invention;

[0042] Figure 6 It is a schematic diagram of the movement of the second adjusting device, the isolating device, the forming device and the winding device of the present invention;

[0043] Figure 7 is a block diagram of a second detection device of the present invention;

[0044] Figure 8 A schematic cross-sectional view of a double-sided tape captured by the second detection device of the present invention;

[0045] Figure 9A schematic diagram of calculating the damping torque of the present invention;

[0046] Figure 10 A schematic diagram of the first adjustment device of the present invention adjusting the first tensioning amount;

[0047] Figure 11 Schematic diagram of the geometric relationship of the first adjusting device of the present invention;

[0048] Figure 12 This is a schematic diagram of the working state of the first isolation roller of the present invention;

[0049] Figure 13 This is a schematic diagram of the working state of the second isolation roller of the present invention;

[0050] Figure 14 Schematic diagram of the structure of the first isolation roller of the present invention;

[0051] Figure 15 The present invention is a flow chart of a coating method of the double-sided adhesive tape coating system.

[0052] Reference numerals in the accompanying drawings: double-sided adhesive tape 10, non-adhesive substrate 11, first dielectric layer 12, second dielectric layer 13, first release paper 14, second release paper 15, unwinding device 21, first adjusting device 22, first gluing device 23, second gluing device 24, first detecting device 25, drying device 26, second adjusting device 27, isolating device 28, second detecting 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, core shaft 44, rotor 45, stator 46, coil 47, magnetic powder 48, first reversing roller 51, second reversing roller 52, tension roller 53, retractor 54, cantilever 55. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0054] like Figure 1 As shown, the double-sided adhesive tape 10 primarily 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 uniform thickness of each layer, the unwinding speed, adhesive release speed, and reference speed are periodically monitored to calculate the first and second tensions for the next cycle. The cycle duration τ is, for example, 0.5 to 2 seconds. During the substrate tension adjustment process, the present invention calculates the first tension provided by the first adjustment device and the second tension provided by the second adjustment device, and then adjusts the damping torque of the isolation device. The damping torque changes the deformation of the release paper, resulting in a more uniform coating of the double-sided adhesive tape 10. Example 1

[0055] like Figures 1 to 14 The coating system of the double-sided adhesive tape 10 of the present invention includes: an unwinding device 21, a first regulating device 22, a first gluing device 23, a second gluing device 24, a first detecting device 25, a drying device 26, a second regulating device 27, an isolating device 28, a forming device 31, a second detecting 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 adhesive tape 10 and is used to control the operating status of each device. The control device 33 is connected to the unwinding device 21, the first regulating device 22, the first gluing device 23, the second gluing device 24, the first detecting device 25, the drying device 26, the second regulating device 27, the isolating device 28, the forming device 31, the second detecting device 29, and the winding device 32 via a system bus 34. Each device can be configured with a PID controller to implement speed feedback control.

[0056] The unwinding device 21 is configured to store the adhesive-free substrate 11. As the coating system operates, the amount of adhesive-free substrate 11 gradually decreases. The unwinding device 21 includes a sensor unit for measuring the stored diameter of the adhesive-free substrate 11. The unwinding speed is an angular velocity, calculated based on the required linear velocity of the adhesive-free substrate 11. The unwinding speed of the adhesive-free substrate 11 is adjusted in real time to prevent changes in the stored diameter from affecting the linear velocity of the adhesive-free substrate 11. The method for calculating the unwinding speed is not described in detail in this disclosure.

[0057] The first adjustment device 22 is configured to adjust the first tension of the non-adhesive substrate 11. The first adjustment device 22 includes a first reversing roller 51, a second reversing roller 52, a tension roller 53, an expander 54, and a cantilever 55. The non-adhesive substrate 11 sequentially passes through the first reversing roller 51, the tension roller 53, and the second reversing roller 52. The expander 54 controls the first tension of the non-adhesive substrate 11 via a first adjustment angle of the cantilever 55.

[0058] The first adhesive coating device 23 is configured to form a single-sided adhesive-coated substrate after coating the first dielectric layer 12 on the adhesive-free substrate 11. Figure 4 The first glue coating device 23 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. The coating roller then transfers the medium to the non-adhesive substrate 11. The medium of the present invention may be, for example, an acrylic resin or azobenzene.

[0059] The second adhesive coating device 24 is configured to coat the single-sided adhesive substrate with the second dielectric layer 13 to form a double-sided adhesive substrate. The second adhesive coating device 24 has the same structure as the first adhesive coating device 23, but has an opposite coating direction.

[0060] The first detection device 25 is configured to detect coating parameters of the double-sided adhesive substrate. In this embodiment, the coating parameters include the coating thickness of the first dielectric layer 12 and the second dielectric layer 13. The first detection device 25 uses, for example, an infrared measurement unit to measure the coating thickness of the first dielectric layer 12 and the second dielectric layer 13.

[0061] The drying device 26 is configured to dry the first and second dielectric layers 12, 13. The base speed of the forming device 31 is calculated based on the operating length of the drying device 26 and the drying time. The forming device 31 pulls the double-sided adhesive substrate at this base speed to ensure the drying time. The diameter of the roller of the forming device 31 remains constant, and the linear speed of the double-sided adhesive substrate is controlled based on the forming device 31, which promotes uniform coating.

[0062] The second adjusting device 27 is configured to adjust the second tension 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 process of the first adjusting device 22 and the second adjusting device 27 is as described in the second embodiment.

[0063] The isolation device 28 is configured to attach the first release paper 14 and the second release paper 15 to the double-sided adhesive substrate, respectively. The isolation device 28 includes a first isolation roller 41 and a second isolation roller 42. The stored diameters of the first isolation roller 41 and the second isolation roller 42 are measured, and a first deformation ratio is calculated based on the molding parameters, and a second deformation ratio is calculated based on the first and second tensions. Based on the first and second deformation ratios, a deformation adjustment amount for the first release paper 14 or the second release paper 15 is calculated. The damping torque of the first isolation roller 41 or the second isolation roller 42 in the isolation device 28 is then calculated based on the deformation adjustment amount and the stored diameters of the first isolation roller 41 or the second isolation roller 42.

[0064] The forming device 31 is configured to press the first release liner 14 and the second release liner 15 onto the double-sided adhesive substrate at a reference speed to form the double-sided adhesive tape 10. The forming device 31 is composed of at least two sets of fixed-size rollers. In further embodiments, the reference speed of the forming device 31 serves as a reference for the operating speed of the coating system. The corresponding linear speed can be calculated by combining the reference speed of the forming device 31 and the diameter of the rollers of the forming device 31. To minimize deformation of the non-adhesive substrate 11, this linear speed is preferably matched to the linear speed of the non-adhesive substrate 11 and the linear speed of the double-sided adhesive tape 10.

[0065] The second detection device 29 is configured to detect the forming parameters of the double-sided tape 10. The forming parameters are the thickness of the first release paper 14 or the second release paper 15. Figure 7The 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, thereby calculating the coating thickness.

[0066] The reel 32 is configured to store the double-sided tape 10. As the coating system operates, the amount of double-sided tape 10 gradually increases. The reel 32 includes a sensor unit for measuring the stored diameter of the double-sided tape 10. The reel speed is calculated based on the required linear speed of the double-sided tape 10 and the stored diameter of the double-sided tape 10. The reel speed of the double-sided tape 10 is adjusted in real time to prevent changes in the stored diameter from affecting the linear speed of the double-sided tape 10. The method for calculating the reel speed is not described in detail in this embodiment.

[0067] The control device 33 adjusts the glue release speeds of the first glue coating device 23 and the second glue coating device 24 based on the coating parameters. For the current cycle t, the control device 33 calculates the glue roller transfer coefficient η(t+1) of the first glue coating device 23 in cycle t+1 based on the coating parameters and glue release speed of cycle t. Then, the glue release speed ω2(t+1) is calculated based on the glue roller transfer coefficient η(t+1), and the glue release speed ω2(t) of the transfer roller is adjusted to the glue release speed ω2(t+1). In this embodiment, the coating thickness of the first dielectric layer 12 in the coating parameters of cycle t is H1, H1=η(t)ω2(t)H0, where H0 is the gap between the metering roller and the transfer roller. The larger the gap, the greater the glue release speed, the greater the glue roller transfer coefficient, and the greater the coating thickness. For the same transfer roller and metering roller, the glue roller transfer coefficient remains unchanged for the same batch of media, that is, η(t)=η(t+1). Therefore, the standard coating thickness H2 = η(t+1)ω2(t+1)H0, and thus ω2(t+1) = H2ω2(t) / H1. The glue discharge speed ω2(t+1) of the t+1 cycle is calculated based on the coating parameters and glue discharge speed of the t cycle.

[0068] The control device 33 calculates a first tension based on the unwinding speed and the glue-dispensing rotational speed, and a second tension based on the reference speed and the glue-dispensing rotational speed. Based on the first and second tensions, the control device 33 controls the first adjustment angle of the first adjustment device 22 and the second adjustment angle of the second adjustment device 27. Specifically, the control device 33 calculates the linear velocity v1(t+1) of the non-glue substrate 11 based on the unwinding speed ω1(t+1) during the t+1 cycle, and calculates the linear velocity v2(t+1) of the single-sided glue-dispensing substrate based on the glue-dispensing rotational speed ω2(t+1). The speed difference v1(t+1)-v2(t+1) of the non-glue substrate 11 is calculated. For a cycle duration τ, the first tension is [v1(t+1)-v2(t+1)]τ. The first adjustment angle of the first adjustment device 22 is then calculated based on the first tension. Changes in the first adjustment angle drive changes in the height of the tension roller, thereby adjusting the first tension. See Example 2 for details.

[0069] 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 molding 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 of the tension of the expander along the direction of movement of the non-adhesive substrate 11. Specifically, the present invention measures the tension of the expander of the first adjustment device 22 and calculates the first tension provided by the first adjustment device 22 based on the tension of the expander and the first adjustment angle. The present invention also measures the tension of the expander of the second adjustment device 27 and calculates the second tension provided by the second adjustment device 27 based on the tension of the expander and the second adjustment angle. See Example 3 for details. Example 2

[0070] This embodiment further discloses a preferred method for calculating the first adjustment angle, the second adjustment angle, the first tension, and the second tension.

[0071] First, calculate the first tension for cycle t+1. For the unadhesive substrate storage diameter R1, the unwinding speed ω1(t+1) corresponds to the linear velocity v1(t+1) = ω1(t+1)R1 of the unadhesive substrate. For the transfer roller diameter R3, the unwinding speed ω2(t+1) corresponds to the linear velocity v2(t+1) = ω2(t+1)R3 of the single-sided adhesive substrate. Calculate the speed difference of the unadhesive substrate: ω1(t+1)R1 - ω2(t+1)R3. For smaller cycle lengths τ, the speed difference is considered constant, and the first tension S1 = [ω1(t+1)R1 - ω2(t+1)R3]τ. Similarly, the linear velocity v3 of the double-sided tape can be calculated, as well as the second tension: (v2-v3)τ = [ω2(t+1)R3 - ω3(t+1)R4]τ. Among them, ω3(t+1) is the reference speed of the t+1 cycle, and R4 is the diameter of the pressure roller of the forming device.

[0072] Then, the target first adjustment angle θ(t+1) for the t+1 cycle is calculated. In this embodiment, for ease of presentation, the target first adjustment angle θ(t+1) is set to θ', and the current first adjustment angle θ(t) is set to θ. The current first adjustment angle θ is substituted into the functional relationship between the total tension and the first adjustment angle to obtain the current total tension S0, and then the target total tension S0' is obtained as S0+S1. The target total tension is then substituted into the functional relationship between the total tension and the first adjustment angle to calculate the target first adjustment angle θ' of the first adjustment device.

[0073] This embodiment further provides a functional relationship between the total tension and the first adjustment angle. Figure 10 , the current total tension S0=L 11 -L0+L 21 -L0,L 11 is the tension between the first reversing roller and the tension roller, L 21 is the tension 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 radius of the first reversing roller, the second reversing roller and the tension roller are all R2. , Among them, the distance between the center of the first reversing roller and the tension roller is , the distance between the center of the second reversing roller and the tension roller , 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 Similarly, for the target first adjustment angle θ', the target total tension .

[0074] Then calculate the first tension F of the first adjustment device in period t+1 11 and the second tension F of the second adjusting device 12 After the first and second adjustment angles are controlled, the tension of the telescopic device changes. Measure the tension F of the telescopic device of the first adjustment device. 13 According to the principle of pulley force, the angle between the first tension or the second tension and the center line of the first adjustment device is equal, and both are set to α1. The tension roller exerts a pulling force on the cantilever of 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 , 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 same method can be used to calculate the second tension F 12 .

[0075] The 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 provided. Figure 11 The angle between the foot of the tangent of the tension roller and the line connecting the first circle center is β1, the angle between the line connecting the first circle center and the perpendicular bisector is β2, and the angle between the perpendicular bisector and the center line is β3, α1=π / 2-(β1+β2+β3). Among them, β1=arccos(2R2 / L 12 ). The horizontal distance between the tension roller and the first reversing roller in the initial state is 2R2. At the current first adjustment angle θ, the horizontal distance variable is sinθtanθL4, β2=arcsin[(2R2-sinθtanθL3) / L 12 ]. At the current first adjustment angle θ, the vertical distance between the tension roller and the first reversing roller is L0+cosθtanθL4, 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 of the tension roller α2=0, α1=π / 2. Therefore, at the current first adjustment angle θ, α2=π / 2-β3=π / 2-arctan[(sinθtanθL3) / (L0+cosθtanθL3)]. Example 3

[0076] This embodiment further discloses a preferred method for calculating and adjusting the damping torque of an isolation device. The isolation device includes a first isolation roller and a second isolation roller. The first isolation roller is used to attach a first release paper, and the second isolation roller is used to attach a second release paper.

[0077] The first deformation ratio is calculated based on the forming parameters, and 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. Figure 8 The average thickness of the first release paper over the length y1 of the first release roller is measured to be x1. Comparing the average thickness x1 with the reference thickness x0, the first deformation ratio of the first release paper before and after lamination is σ0 = y1(x0-x1) / x0y1 = (x0-x1) / x0.

[0078] The second deformation ratio is calculated based on the first tension and the second tension. The second deformation ratio refers to the deformation of the double-sided adhesive substrate. Generally, 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 molding device. A1 is the cross-sectional area of ​​the double-sided adhesive substrate, usually 0.1~3mm 2E1 is the elastic modulus of the double-sided adhesive substrate, usually 0.1~0.8GPa. In conjunction with Example 2, σ1=F 13 cosθ' × L4 / [2sinα2cosα1L3A1E1]. The deformation adjustment amount of the first or second release paper is calculated based on the first deformation ratio and the second deformation ratio. The deformation of the release paper is adjusted to the second deformation ratio using this deformation adjustment amount. The deformation adjustment amount σ2 = σ1 - σ0.

[0079] Reference Figure 12 and Figure 13 As the release paper is used, the storage diameter gradually decreases. 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 are measured using methods such as image detection and encoder counters. The damping torque of the first isolation roller or the second isolation roller in the isolation device is calculated. The damping force F of the first isolation roller is 21 =σ2A2E2, where A2 is the cross-sectional area of ​​the first release paper or the second release paper, usually 0.02~0.5mm 2 E2 is the elastic modulus of the first release paper or the second release paper, usually 0.5~2GPa. Therefore, the damping torque M1 of the first isolation roller is equal to F 21 R5. The same method can be used to obtain the damping force F of the second isolation roller 22 and damping torque M2=F 22 R5.

[0080] Reference Figure 14 The first isolation roller 41 includes a rubber wheel 43, a core shaft 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 to the inside of the rubber wheel 43, and the stator 46 is fixed to the outside of the core shaft 44. The core shaft 44 is rotatably mounted on a bracket (not shown) of the coating system. The coil 47 is embedded in an annular groove within the stator 46. A magnetic gap is defined between the stator 46 and the rotor 45, and the magnetic powder 48 is distributed within the gap. The power supply is connected to the coil 47 via a current controller. The current controller adjusts the excitation current between the power supply and the coil 47, thereby adjusting the damping torque. More specifically, the excitation current I = M1 / K = σ2A2E2R5 / K. The torque constant K is related to the magnetic powder properties and the gap design. Example 4

[0081] Reference Figure 15 The present invention provides a coating method for the double-sided tape coating system. The method measures coating and molding parameters during period t, with a time interval of τ, and generates a tension adjustment device and a damping torque for an isolation device during period t+1 to improve coating stability. The method includes the following steps.

[0082] Initialize system parameters, preset the first tensioning amount and the second tensioning amount, and preset the cycle t=0.

[0083] Step 1: Adjust the unwinding speed and the first tension of the non-adhesive substrate.

[0084] Step 2: coating the adhesive-free substrate with a first dielectric layer to produce a single-sided adhesive substrate, and coating the single-sided adhesive substrate with a second dielectric layer to produce a double-sided adhesive substrate.

[0085] Step 3: Detect coating parameters of the double-sided adhesive substrate and adjust the second tension of the double-sided adhesive substrate.

[0086] Step 4: Attach a first release paper and a second release paper to the double-sided adhesive substrate respectively, and 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.

[0087] Step 5: Check the forming parameters of the double-sided tape and adjust the winding speed of the double-sided tape.

[0088] Step 6: Adjust the glue dispensing speed based on the coating parameters.

[0089] Step 7: Calculate the first tensioning amount and the second tensioning amount, and control the first adjustment angle of the first adjustment device and the second adjustment angle of the second adjustment device.

[0090] Step 8: Adjust the damping torque of the isolation device based on the molding parameters, the first tension, and the second tension. t=t+1, and return to step 1.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection 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 an unwinding speed of the adhesive-free substrate according to a storage diameter; a first adjusting device configured to adjust a first tensioning amount of the adhesive-free substrate; The first adhesive coating device is configured to coat the adhesive-free substrate with the first dielectric layer to produce a single-sided adhesive-coated substrate; The second adhesive coating device is configured to coat the single-sided adhesive substrate with a second dielectric layer to produce 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 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 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 configured to detect molding parameters of the double-sided tape; a winding device 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 dispensing speed of the first glue coating device and the second glue coating device based on the coating parameters, wherein: The control device calculates a first tension based on the unwinding speed and the glue releasing speed, calculates a second tension 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 tension and the second tension. The control device calculates a first tension provided by the first adjustment device and a 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. The first adjustment device includes a first reversing roller, a second reversing roller, a tension roller, a telescope and a cantilever. The tension of the telescope is measured. The angle between the first tension or the second tension and the center line of the first adjustment device is equal. The telescope and the tension roller form a lever mechanism. The first tension is calculated based on the balance relationship of the cantilever. The second tension is calculated using the same method. The isolation device includes a first isolation roller and a second isolation roller, and the stored diameters of the first isolation roller and the second isolation roller are measured. A first deformation ratio is calculated based on the forming parameters, and a second deformation ratio is calculated based on the first tension and the second tension. A deformation adjustment amount of the first release paper or the second release paper is calculated based on the first deformation ratio and the second deformation ratio. Then, a damping torque of the first isolation roller or the second isolation roller in the isolation device is calculated based on the deformation adjustment amount and the stored diameters of the first isolation roller or the second isolation roller. The damping force of the first isolation roller is first calculated based on the deformation adjustment amount, and then the damping torque of the first isolation roller is calculated. The forming parameters include an average coating thickness of the first release paper, and the average coating thickness of the first release paper is compared with a reference coating thickness to calculate a first deformation ratio before and after coating of the first release paper.

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 non-glue 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 based on the coating parameters and glue release speed of the t period, and then calculates the glue release speed ω2(t+1) based on 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 non-glue substrate passes through the first reversing roller, the tension roller and the second reversing roller in sequence, and the telescoping device controls a first tensioning amount of the non-glue substrate via a 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 based on the unwinding speed ω1(t+1) of the t+1 cycle, calculates the linear speed v2(t+1) of the single-sided glue-attached substrate based on the glue unwinding speed ω2(t+1), calculates the speed difference of the non-glue substrate and the first tensioning amount, and then calculates the first adjustment angle based on the first tensioning amount.

6. The double-sided tape coating system according to claim 5, characterized in that: Measure the tension of the telescope of the first adjustment device, calculate the first tension provided by the first adjustment device based on the tension of the telescope and the first adjustment angle, measure the tension of the telescope of the second adjustment device, and calculate the second tension provided by the second adjustment device based on the tension of the telescope and the second adjustment angle.

7. The double-sided tape coating system according to claim 1, characterized in that: 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 molding parameters based on the characteristic image and the template image.

8. 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.

9. 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 tension of the non-glue substrate; Step 2: coating the adhesive-free substrate with a first dielectric layer to produce a single-sided adhesive substrate, and coating the single-sided adhesive substrate with a second dielectric layer to produce a double-sided adhesive substrate; Step 3: Detect the coating parameters of the double-sided adhesive substrate and adjust the second tension of the double-sided adhesive substrate; Step 4: Attaching a first release liner and a second release liner to the double-sided adhesive substrate respectively, and pressing the first release liner and the second release liner onto the double-sided adhesive substrate at a reference speed to form a double-sided adhesive tape; Step 5: Check the forming 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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