A method for measuring and controlling the tension of a dry film tail on a film laminating machine and a measuring device

Abstract

The application provides a dry film tail tension measuring method, a control method and a measuring device for a film laminating machine, and relates to the technical field of PCB manufacturing. The dry film tail tension measuring method comprises the following steps: S1, attaching the dry film to the upper guide block of the film laminating machine; S2, winding the lower dry film around the rigid rod through the center of the presser; S3, using the tension meter to pull the rigid rod; S4, cutting the lower dry film so that the lower dry film is adsorbed on the lower guide block; and S5, using the tension meter to measure the tension value of the dry film. The dry film is wound around the rigid rod, the dry film is cut, the dry film is adsorbed on the guide block, and the tension of the dry film tail is measured by the tension meter, so that the dry film tail tension of the film laminating machine is measured, thereby overcoming the problem that the dry film tail tension of the film laminating machine cannot be quantitatively measured in the prior art, resulting in inaccurate tension control, which in turn easily causes defects such as wrinkles and bubbles, and finally leads to problems such as material waste and high product failure rate.

Description

Technical Field

[0001] This invention relates to the field of PCB manufacturing technology, and in particular to a method, control method and measuring equipment for measuring the tension at the tail end of dry film on a laminating machine. Background Technology

[0002] Film laminating machines are widely used in the manufacturing process of various electronic products, such as applying protective or functional films to components like screens and circuit boards. To ensure the quality of film lamination, it is necessary to precisely control various parameters during the process, among which the tension at the end of the dry film is a key factor.

[0003] Too low tension at the tail end of the dry film can cause the film to loosen, making it prone to defects such as wrinkles and bubbles, affecting the product's appearance and performance; while too high tension may cause the film to stretch and deform, or even break.

[0004] Traditional laminating machines typically rely on operator experience to adjust dry film tension, lacking methods for quantitative measurement and precise control. This experience-based approach is inefficient, inconsistent, and prone to material waste and product defects.

[0005] Therefore, there is a need to develop a method that can accurately measure the tension at the tail of the dry film in order to improve the quality of film application and reduce production costs. Summary of the Invention

[0006] To overcome the problems existing in related technologies, one of the objectives of this invention is to provide a method for measuring the tension at the tail end of dry film on a laminating machine. This method involves winding the dry film around a rigid rod, cutting the dry film, allowing it to adhere to a guide block, and measuring the tension at the tail end of the dry film using a tension gauge. This method overcomes the problems in existing technologies where the tension at the tail end of dry film on laminating machines cannot be quantitatively measured, leading to inaccurate tension control, which in turn easily causes defects such as wrinkles and bubbles, ultimately resulting in material waste and high product defect rates.

[0007] A method for measuring the tension at the tail end of dry film on a laminating machine includes the following steps:

[0008] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0009] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod;

[0010] S3. Use a force gauge to pull the rigid rod;

[0011] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0012] S5. Use the tension gauge to measure the tension value of the dry film.

[0013] Furthermore, in step S1, the dry film is attached to the upper guide block of the laminating machine using adhesive tape.

[0014] Furthermore, to ensure a stable connection between the lower dry film and the rigid rod, the lower dry film can be wound multiple times.

[0015] Furthermore, in order to ensure that the force gauge measures accurately, the force gauge needs to be used at the center of the rigid rod.

[0016] Furthermore, the rigid rod is made of aluminum.

[0017] Using an aluminum rod as the rigid rod for winding the dry film ensures both light weight and sufficient strength, guaranteeing measurement accuracy while facilitating operation.

[0018] Furthermore, the length of the aluminum rod is slightly greater than the width of the dry film.

[0019] Setting the length of the aluminum rod to be slightly greater than the width of the dry film can effectively prevent the dry film from slipping off and ensure a uniform distribution of force when the dynamometer is pulled, thereby improving measurement accuracy.

[0020] Furthermore, the range of the tension gauge is greater than or equal to 70N.

[0021] Choosing a tension gauge with a range of 70N or greater can cover a wider range of tension measurements, be suitable for different types of dry films and different lamination processes, and ensure measurement accuracy.

[0022] Furthermore, the width of the dry film is greater than 600 mm.

[0023] Limiting the dry film width to greater than 600 mm clarifies its applicable scope, making it more targeted and providing guidance for practical applications.

[0024] The second objective of this invention is to provide a method for controlling the tension at the tail end of a dry film in a laminating machine, wherein the laminating machine includes an adjustable frequency fan;

[0025] The method for controlling the tension of the dry film tail end on this laminating machine includes:

[0026] S10. Measure the tail tension of the dry film using the method described above for measuring the tail tension of the dry film on the laminating machine.

[0027] S20. Based on the measured dry film tension value, control the frequency of the fan to keep the tension at the tail end of the dry film within the target tension range.

[0028] By measuring the tail tension of the dry film and combining this with an adjustable-frequency fan, the fan frequency can be controlled to achieve dry film tension control. This allows for setting a target tension based on actual needs and achieving precise control through fan frequency adjustment, significantly improving the automation and control accuracy of the lamination process, ultimately increasing product yield.

[0029] Before step S20, the following is included:

[0030] S11. Adjust the frequency of the fan, repeat step S10, and measure the dry film tension value at different fan frequencies.

[0031] Step S11 allows us to obtain the relationship between the fan frequency and the dry film tail tension. Based on this relationship, we can determine the optimal fan frequency, thereby controlling the dry film tail tension within an ideal range, ensuring film application quality, and reducing material waste.

[0032] Furthermore, step S20 includes:

[0033] If the measured tension value at the tail of the dry film is greater than the target tension range, reduce the frequency of the fan and repeat step S10.

[0034] If the measured tension value at the tail of the dry film is less than the target tension range, increase the frequency of the fan and repeat step S10.

[0035] If the measured tension value at the tail of the dry film is within the target tension range, then maintain the frequency of the fan.

[0036] By adjusting the fan frequency according to the measured values, closed-loop control of the dry film tail tension is achieved, which can more accurately maintain the tension within the target range, while reducing the number of measurements, thereby improving the film application quality and efficiency and reducing material waste.

[0037] Furthermore, the different fan frequencies are multiple frequencies within the range of 0 to 100 Hz.

[0038] By setting a frequency range, it can adapt to the needs of different types of dry film and different application speeds, and the optimal frequency can be selected according to the actual situation.

[0039] The third objective of this invention is to provide a measuring device for the tension of the dry film tail end on a laminating machine, for implementing the method for measuring the tension of the dry film tail end on a laminating machine as described above, or the method for measuring the tension of the dry film tail end on a laminating machine as described in any one of claims 6-9, including a rigid rod and a tension gauge;

[0040] The rigid rod has a first interface in the middle, and the measuring end of the tension gauge has a second interface, with the first interface corresponding to the second interface.

[0041] Furthermore, the first interface is a card slot structure, and the second interface is a hook-shaped structure that matches the card slot structure.

[0042] Furthermore, both ends of the rigid rod are equipped with clamps for fixing the dry film.

[0043] Furthermore, connectors extend symmetrically from both ends of the rigid rod along the outer side, forming an isosceles triangle with the rigid rod, and the first interface is located at the corner point.

[0044] The beneficial effects of this invention are as follows:

[0045] This invention provides a method for measuring the tension at the tail end of a dry film on a laminating machine. The method includes the following steps: fixing the dry film onto a guide block and a rigid rod to simulate the actual laminating state; using a tension gauge to pull the rigid rod to simulate the stretching of the dry film; cutting the dry film so that it is only held in place by the guide block; and finally measuring the actual tension value of the dry film using the tension gauge. This direct measurement method can accurately reflect the tension state at the tail end of the dry film, overcoming the errors caused by relying on experience or indirect measurements in the past. It provides a reliable data basis for subsequent tension control and process optimization, thereby improving laminating quality and reducing production costs. Attached Figure Description

[0046] Figure 1 This is a flowchart of the method for measuring the tension at the tail end of the dry film on the laminating machine provided in this application;

[0047] Figure 2 This is a schematic diagram of the device for measuring the tension of the dry film tail end on the laminating machine provided in Embodiment 5 of this application;

[0048] Figure 3 This is a schematic diagram of the device for measuring the tension of the dry film tail end on the laminating machine provided in Embodiment 6 of this application;

[0049] Figure label:

[0050] 1. Rigid rod; 11. First interface; 12. Fixture; 13. Connector. Detailed Implementation

[0051] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0052] Example 1

[0053] like Figures 1 to 3 As shown, this embodiment provides a method for measuring the tension at the tail end of a dry film on a laminating machine. The method is used to measure a dry film with a width of 610mm located on the laminating machine. The laminating machine includes a fan with an adjustable frequency, uses an aluminum rod with a diameter of 8mm and a length of 620mm as a rigid rod 1, and uses a tension gauge with a range of 70N. The measuring end of the tension gauge is a hook.

[0054] The method for measuring the tension at the tail end of the dry film on this laminating machine includes the following steps:

[0055] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0056] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1;

[0057] S3. Use a tension gauge to hook the center point of rigid rod 1 and pull it;

[0058] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0059] S5. Use the tension gauge to measure the tension value of the dry film.

[0060] This embodiment provides a basic method for measuring the tension at the tail end of dry film on a laminating machine. The dry film is fixed to a guide block and an aluminum rigid rod 1 to simulate the actual laminating process. A 70N tensile tester is used to pull the rigid rod 1, simulating the stretching of the dry film. The dry film is then cut, allowing it to adhere solely to the guide block. Finally, the actual tension value of the dry film is measured using the tensile tester. The 620mm long aluminum rod allows for easy winding of a 610mm wide dry film, and the 70N tensile tester is suitable for most laminating applications.

[0061] Example 2

[0062] like Figures 1 to 3 As shown, this embodiment provides a method for measuring the tension at the tail end of a dry film on a laminating machine. The method is used to measure the tension of a dry film with a width of 800 mm located on the laminating machine. The laminating machine includes a fan with an adjustable frequency, uses a carbon fiber rod with a diameter of 10 mm and a length of 810 mm as a rigid rod 1, and uses a tension gauge with a range of 100 N. The measuring end of the tension gauge is a hook.

[0063] The method for measuring the tension at the tail end of the dry film on this laminating machine includes the following steps:

[0064] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0065] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1;

[0066] S3. Use a tension gauge to hook the center point of rigid rod 1 and pull it;

[0067] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0068] S5. Use the tension gauge to measure the tension value of the dry film.

[0069] This embodiment provides a basic method for measuring the tension at the tail end of dry film on a laminating machine. A carbon fiber rod with a diameter of 10mm and a length of 810mm is used as the rigid rod 1. Its higher strength and stiffness allow it to withstand greater tension, making it suitable for dry films with a width of, for example, 800mm and higher tension. Simultaneously, a tension gauge with a range of 100N is used to broaden the measurable tension range. The carbon fiber rod is lighter and more corrosion-resistant than an aluminum rod, further improving the stability and reliability of the measurement, making it particularly suitable for laminating processes in special environments.

[0070] Example 3

[0071] like Figures 1 to 3 As shown, this embodiment provides a method for controlling the tension of the dry film tail end on a laminating machine, controlling the dry film with a width of 610mm located on the laminating machine, which has an adjustable frequency fan.

[0072] The method for controlling the tension at the tail end of the dry film on this laminating machine includes the following steps:

[0073] S10. Measure the tail tension of the dry film;

[0074] S11. Adjust the frequency of the fan, repeat step S10, and measure the dry film tension value at different fan frequencies.

[0075] S20. Based on the measured dry film tension value, control the frequency of the fan to keep the tension at the tail end of the dry film within the target tension range.

[0076] Specifically, S10 includes:

[0077] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0078] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1;

[0079] S3. Use a force gauge to pull the rigid rod 1;

[0080] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0081] S5. Use the tension gauge to measure the tension value of the dry film.

[0082] More specifically, the different fan frequencies are multiple frequencies in the range of 0 to 100 Hz.

[0083] This embodiment provides a method for controlling the tension at the tail end of the dry film on a laminating machine. By adjusting the frequency of the blower and repeatedly measuring the dry film tension at different frequencies, a curve or table showing the relationship between the blower frequency and the dry film tension can be obtained. This allows operators to quickly find the optimal blower frequency based on the target tension value, avoiding the tedious process of repeated trial and error, improving production efficiency, and ensuring the accuracy of tension control. The frequency range of 0 to 100 Hz covers the adjustable range of most blowers, providing broad applicability.

[0084] Example 4

[0085] like Figures 1 to 3 As shown, this embodiment provides a method for controlling the tension of the dry film tail end on a laminating machine, controlling the dry film with a width of 610mm located on the laminating machine, which has an adjustable frequency fan.

[0086] The method for controlling the tension at the tail end of the dry film on this laminating machine includes the following steps:

[0087] S10. Measure the tail tension of the dry film;

[0088] S21. If the measured tension value at the tail of the dry film is greater than the target tension range, reduce the frequency of the fan and repeat step S10.

[0089] S22. If the measured tension value at the tail of the dry film is less than the target tension range, increase the frequency of the fan and repeat step S10.

[0090] S23. If the measured tension value at the tail of the dry film is within the target tension range, then maintain the frequency of the fan.

[0091] Specifically, S10 includes:

[0092] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0093] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1;

[0094] S3. Use a force gauge to pull the rigid rod 1;

[0095] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0096] S5. Use the tension gauge to measure the tension value of the dry film.

[0097] This embodiment provides a method for controlling the tension at the tail end of the dry film on a laminating machine. By comparing the measured tension value with the target tension range and adjusting the fan frequency in real time based on the difference, closed-loop feedback control is achieved. This dynamic adjustment method can more quickly and accurately control the dry film tension within the target range, maintaining tension stability, thereby significantly improving laminating quality and production efficiency.

[0098] Example 5

[0099] like Figures 1 to 3 As shown, this embodiment provides a measuring device for the tension of the dry film tail end on a laminating machine, used to implement the method for measuring the tension of the dry film tail end on a laminating machine as described in Embodiment 1.

[0100] The equipment for measuring the dry film tail tension on this laminating machine includes:

[0101] Rigid rod 1 is an aluminum rod with a length of 620mm and a diameter of 8mm. It has a first interface 11 with a slot structure in the middle and clamps 12 at both ends for fixing the dry film.

[0102] Tensile gauge: The measuring range is 70N, and the measuring end is a second interface with a hook-shaped structure that matches the slot structure.

[0103] In this embodiment, the process of measuring the dry film tail tension using the measuring device includes:

[0104] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0105] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1, and fix it by the clamps 12 at both ends of the rigid rod 1;

[0106] S3. Use the hook-shaped structure of the tension gauge to hook onto the slot structure at the center of the rigid rod 1 and pull it.

[0107] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0108] S5. Use the tension gauge to measure the tension value of the dry film.

[0109] This embodiment provides a device for measuring the tension of the dry film tail end on a laminating machine. By setting a clamp 12 on the aluminum rigid rod 1, the dry film can be more firmly clamped, preventing slippage during measurement and improving measurement accuracy. The matching design of the slot structure in the middle of the rigid rod 1 and the hook-shaped measuring end of the tension gauge simplifies the operation steps and makes the measurement process more convenient and stable. The device has a compact structure, is easy to operate, and is suitable for various laminating machines, facilitating practical applications.

[0110] Example 6

[0111] like Figures 1 to 3 As shown, this embodiment provides a measuring device for the tension of the dry film tail end on a laminating machine, used to implement the method for measuring the tension of the dry film tail end on a laminating machine as described in Embodiment 4.

[0112] The equipment for measuring the dry film tail tension on this laminating machine includes:

[0113] A rigid rod 1 has connecting parts 13 extending symmetrically from both ends of the rigid rod 1 along the outer side. The connecting parts 13 and the rigid rod 1 form an isosceles triangle, and a first interface 11 is provided at the vertex of the isosceles triangle. The first interface 11 is a retaining ring.

[0114] The tension gauge has a measuring end that connects to a hook-shaped structure as a second interface.

[0115] In this embodiment, the process of measuring the dry film tail tension using the measuring device includes:

[0116] S1. Attach the upper dry film to the upper guide block of the laminating machine;

[0117] S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1, making three turns.

[0118] S3. Insert the hook-shaped structure on the tension gauge into the retaining ring, and use the tension gauge to pull the rigid rod 1;

[0119] S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block;

[0120] S5. Use the tension gauge to measure the tension value of the dry film.

[0121] S21. If the measured tension value at the tail of the dry film is greater than the target tension range, reduce the frequency of the fan and repeat steps S1 to S5.

[0122] S22. If the measured tension value at the tail of the dry film is less than the target tension range, increase the frequency of the fan and repeat steps S1 to S5.

[0123] S23. If the measured tension value at the tail of the dry film is within the target tension range, then maintain the frequency of the fan.

[0124] This embodiment provides a device for measuring the tension of the dry film tail end on a laminating machine. The connectors 13 and retaining ring structure extending from both ends of the rigid rod 1 allow for convenient and quick connection to a tension gauge and tension measurement, even when the dry film is wound multiple times. Combined with the closed-loop control method of Embodiment 4, the fan frequency can be adjusted in real time based on the measurement results, achieving more precise and stable tension control, thereby improving laminating quality and production efficiency.

[0125] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. Any specific values ​​in all examples shown and discussed herein should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0126] Furthermore, it should be noted that the use of terms such as "first" and "second" is merely for ease of distinction, and unless otherwise stated, these terms have no special meaning and therefore should not be construed as limiting the scope of protection of this application.

[0127] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for measuring the tension at the tail end of a dry film on a laminating machine, characterized in that, Includes the following steps: S1. Attach the upper dry film to the upper guide block of the laminating machine; S2. Pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod; S3. Use a force gauge to pull the rigid rod; S4. Cut the lower dry film so that the lower dry film is adsorbed onto the lower guide block; S5. Use the tension gauge to measure the tension value of the dry film.

2. The method for measuring the tension at the tail end of the dry film on the laminating machine according to claim 1, characterized in that: The rigid rod is an aluminum rod.

3. The method for measuring the tension at the tail end of the dry film on the laminating machine according to claim 2, characterized in that: The length of the aluminum rod is slightly greater than the width of the dry film.

4. The method for measuring the tension at the tail end of the dry film on the laminating machine according to claim 1, characterized in that: The range of the tension gauge is greater than or equal to 70N.

5. The method for measuring the tension at the tail end of the dry film on the laminating machine according to claim 1, characterized in that: The width of the dry film is greater than 600 mm.

6. A method for controlling the tension at the tail end of a dry film laminator, characterized in that: The film applicator includes an adjustable frequency fan; The method for controlling the tension of the dry film tail end on this laminating machine includes: S10. Measure the tail tension of the dry film using the method for measuring the tail tension of the dry film on the laminating machine as described in any one of claims 1-5. S20. Based on the measured dry film tension value, control the frequency of the fan to keep the tension at the tail end of the dry film within the target tension range.

7. The method for controlling the tension at the tail end of the dry film on the laminating machine according to claim 6, characterized in that: Before step S20, the following is included: S11. Adjust the frequency of the fan, repeat step S10, and measure the dry film tension value at different fan frequencies.

8. The method for controlling the tension at the tail end of the dry film on the laminating machine according to claim 6, characterized in that: Step S20 includes: S21. If the measured tension value at the tail of the dry film is greater than the target tension range, reduce the frequency of the fan and repeat step S10. S22. If the measured tension value at the tail of the dry film is less than the target tension range, increase the frequency of the fan and repeat step S10. S23. If the measured tension value at the tail of the dry film is within the target tension range, then maintain the frequency of the fan.

9. The method for controlling the tension at the tail end of the dry film on the laminating machine according to claim 7, characterized in that: The different fan frequencies are multiple frequencies within the range of 0 to 100 Hz.

10. A device for measuring the tension at the tail end of a dry film on a laminating machine, characterized in that, A method for measuring the tension at the tail end of a dry film on a laminating machine as described in any one of claims 1-5, or a method for controlling the tension at the tail end of a dry film on a laminating machine as described in any one of claims 6-9, comprising: Rigid rod and tension gauge; The rigid rod has a first interface in the middle, and the measuring end of the tension gauge has a second interface, with the first interface corresponding to the second interface.

Images