Measurement method, control method and measurement equipment for tail tension of dry film on film sticking machine

Abstract

The invention provides a measuring method, a control method and measuring equipment for the tail tension of a dry film on a film sticking machine, and relates to the technical field of PCB manufacturing, the measuring method for the tail tension of the dry film on the film sticking machine comprises the following steps: S1, attaching an upper dry film to an upper guide block of the film sticking machine; s2, enabling a lower dry film to penetrate through the center of the pressing roller to be wound on a rigid rod; s3, pulling the rigid rod by using a tension meter; s4, the lower dry film is cut off, so that the lower dry film is adsorbed on the lower guide block; and S5, measuring the tension value of the dry film by using a tension meter. The dry film is wound on the rigid rod, the dry film is cut, the dry film is adsorbed on the guide block, and the tension of the tail of the dry film is measured through the tension meter, so that the tension of the tail of the dry film on the film sticking machine is measured, and the defects that in the prior art, the tension of the tail of the dry film on the film sticking machine cannot be quantitatively measured, and consequently tension control is inaccurate are overcome. And finally, the problems of material waste, high product reject ratio and the like are caused.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB manufacturing, and in particular to a method for measuring and controlling the tension of a dry film tail on a laminating machine, and a measuring device. Background Art

[0002] Film laminating machines are widely used in various electronic product manufacturing processes, such as attaching protective films or functional films to screens, circuit boards and other components. In order to ensure the quality of film laminating, various parameters in the film laminating process need to be precisely controlled, among which the tension of the dry film tail is a key factor.

[0003] If the tension at the end of the dry film is too low, the film will become loose, which may easily cause defects such as wrinkles and bubbles, affecting the appearance and performance of the product; if the tension is too high, the film may be stretched, deformed, or even broken.

[0004] Traditional film laminating machines usually rely on the operator's experience to adjust the dry film tension, lacking the means of quantitative measurement and precise control. The experience-based method is inefficient, inconsistent, and prone to material waste and product defects.

[0005] Therefore, it is necessary to develop a method that can accurately measure the tension of the tail of the dry film to improve the quality of film lamination and reduce production costs. Summary of the invention

[0006] In order to overcome the problems existing in the related art, one of the objects of the present invention is to provide a method for measuring the tension of the tail of a dry film on a film laminating machine. The method for measuring the tension of the tail of a dry film on a film laminating machine is to wrap the dry film on a rigid rod, cut the dry film, adsorb the dry film on a guide block, and measure the tension of the tail of the dry film by a tensile gauge, thereby realizing the measurement of the tension of the tail of the dry film on the film laminating machine, so as to overcome the problem in the prior art that it is impossible to quantitatively measure the tension of the tail of the dry film on the film laminating machine, resulting in inaccurate tension control, which in turn easily causes defects such as wrinkles and bubbles, and ultimately leads to material waste and high product defective rate.

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

[0008] S1, attaching the upper dry film to the upper guide block of the film 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, pulling the rigid rod using a dynamometer;

[0011] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

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

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

[0015] Furthermore, in order for the tensile gauge to measure accurate values, the tensile gauge needs to measure at the center of the rigid rod.

[0016] Furthermore, the rigid rod is an aluminum rod.

[0017] An aluminum rod is used as the rigid rod for winding the dry film. It is light in weight and strong enough, which ensures the accuracy of measurement and is convenient for 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 slightly larger than the width of the dry film can effectively prevent the dry film from slipping and ensure uniform distribution of force when the tensile gauge is pulled, thereby improving measurement accuracy.

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

[0021] Selecting a dynamometer with a range greater than or equal to 70N can cover a wider tension measurement range, is suitable for different types of dry films and different film laminating processes, and ensures measurement accuracy.

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

[0023] The dry film width is limited to greater than 600 mm, which clarifies the scope of application, makes it more targeted, and provides guidance for practical applications.

[0024] A second object of the present invention is to provide a method for controlling the tension of the tail of a dry film on a film laminating machine, wherein the film laminating machine includes a fan with adjustable frequency;

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

[0026] S10, measuring the tail tension of the dry film using the method for measuring the tail tension of the dry film on the film laminating machine as described above;

[0027] S20, according to the measured dry film tension value, controlling the frequency of the fan so that the tension of the dry film tail is within the target tension range.

[0028] By measuring the tail tension of the dry film and combining it with a fan with adjustable frequency, the fan frequency is controlled to control the tension of the dry film. The target tension can be set according to actual needs, and precise control can be achieved by adjusting the fan frequency, which significantly improves the automation and control accuracy of the film laminating process and ultimately improves the product yield.

[0029] The step S20 includes:

[0030] S11, adjusting the frequency of the fan, repeating step S10, and measuring the dry film tension values ​​at different fan frequencies.

[0031] Through step S11, the correspondence between the fan frequency and the tension of the dry film tail can be obtained, and the optimal fan frequency is determined according to the correspondence, so that the tension of the dry film tail is controlled within an ideal range, ensuring the film quality and reducing material waste.

[0032] Furthermore, the step S20 includes:

[0033] If the measured tension value of the dry film tail is greater than the target tension range, the frequency of the fan is reduced and step S10 is repeated;

[0034] If the measured tension value of the dry film tail is less than the target tension range, the frequency of the fan is increased and step S10 is repeated;

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

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

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

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

[0039] The third object of the present invention is to provide a device for measuring the tension of the tail of a dry film on a laminating machine, which is used to implement the method for measuring the tension of the tail of a dry film on a laminating machine as described above, or the method for measuring the tension of the tail of a dry film on a laminating machine as described in any one of claims 6 to 9, comprising a rigid rod and a dynamometer;

[0040] A first interface is provided at the middle of the rigid rod, and a second interface is provided at the measuring end of the dynamometer, and the first interface corresponds to the second interface.

[0041] Furthermore, the first interface is a slot structure, and the second interface is a hook structure matching the slot structure.

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

[0043] Furthermore, connecting pieces are symmetrically extended from both ends of the rigid rod along the outside, the connecting piece and the rigid rod form an isosceles triangle, and the first interface is arranged at a corner point.

[0044] The beneficial effects of the present invention are:

[0045] The present invention provides a method for measuring the tension of the tail of a dry film on a film laminating machine, and the method comprises the following steps: fixing the dry film on a guide block and a rigid rod to simulate the actual film laminating state; using a tensile gauge to pull the rigid rod to simulate the state of the dry film being stretched; cutting off the dry film so that it is only adsorbed by the guide block; and finally using a tensile gauge to measure the actual tension value of the dry film. This direct measurement method can accurately reflect the tension state of the tail of the dry film, overcomes the errors caused by relying on experience or indirect measurement in the past, and provides a reliable data basis for subsequent tension control and process optimization, thereby improving the quality of film laminating and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a flow chart of a method for measuring the tension of the tail of a dry film on a film laminating machine provided in the present application;

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

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

[0049] Reference numerals:

[0050] 1. Rigid rod; 11. First interface; 12. Clamp; 13. Connector. DETAILED DESCRIPTION

[0051] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present 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 of the tail of a dry film on a film laminating machine, which is used to measure a dry film with a width of 610 mm on the film laminating machine. The film laminating machine includes a fan with an adjustable frequency, an aluminum rod with a diameter of 8 mm and a length of 620 mm is used as the rigid rod 1, and a dynamometer with a range of 70 N is used, and the measuring end of the dynamometer is a hook.

[0054] The method for measuring the tension of the tail of the dry film on the film laminating machine comprises the following steps:

[0055] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0056] S2, passing the lower dry film through the center of the pressure roller and winding it around the rigid rod 1;

[0057] S3, use a dynamometer to hook the center point of the rigid rod 1 and pull it;

[0058] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

[0060] This embodiment provides a basic method for measuring the tension of the tail of a dry film on a film laminating machine. The dry film is fixed on the guide block and the aluminum rigid rod 1 to simulate the actual film laminating state; the rigid rod 1 is pulled using a dynamometer with a range of 70N to simulate the state of the dry film being stretched; the dry film is cut off so that it is only adsorbed by the guide block; and finally the actual tension value of the dry film is measured using a dynamometer. A 620mm long aluminum rod can conveniently wrap a 610mm wide dry film, and a 70N range dynamometer can be used to adapt to most film laminating application scenarios.

[0061] Example 2

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

[0063] The method for measuring the tension of the tail of the dry film on the film laminating machine comprises the following steps:

[0064] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0065] S2, passing the lower dry film through the center of the pressure roller and winding it around the rigid rod 1;

[0066] S3, use a dynamometer to hook the center point of the rigid rod 1 and pull it;

[0067] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

[0069] This embodiment provides a basic method for measuring the tension of the tail of a dry film on a film laminating machine. A carbon fiber rod with a diameter of 10 mm and a length of 810 mm is used as the rigid rod 1. Its higher strength and rigidity can withstand greater tension, and it is suitable for, for example, a dry film with a width of 800 mm and greater tension. At the same time, a dynamometer with a range of 100N is used to broaden the measurable tension range. Compared with aluminum rods, carbon fiber rods are lighter and more corrosion-resistant, which further improves the stability and reliability of the measurement, and is particularly suitable for film laminating processes under special environments.

[0070] Example 3

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

[0072] The method for controlling the tension of the tail of the dry film on the film laminating machine comprises the following steps:

[0073] S10, measuring the tail tension of the dry film;

[0074] S11, adjusting the frequency of the fan, repeating step S10, and measuring the dry film tension values ​​at different fan frequencies.

[0075] S20, according to the measured dry film tension value, controlling the frequency of the fan so that the tension of the dry film tail is within the target tension range.

[0076] Specifically, S10 includes:

[0077] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0078] S2, passing the lower dry film through the center of the pressure roller and winding it around the rigid rod 1;

[0079] S3, using a dynamometer to pull the rigid rod 1;

[0080] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

[0081] S5. Use the tensile 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 of the tail of a dry film on a film laminating machine. By adjusting the frequency of the fan and repeatedly measuring the tension of the dry film at different frequencies, a corresponding relationship curve or table between the fan frequency and the dry film tension can be obtained. This allows the operator to quickly find the corresponding optimal fan frequency according to 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 fans and has a wide range of applicability.

[0084] Example 4

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

[0086] The method for controlling the tension of the tail of the dry film on the film laminating machine comprises the following steps:

[0087] S10, measure the tail tension of the dry film;

[0088] S21, if the measured tension value of the dry film tail is greater than the target tension range, the frequency of the fan is reduced and step S10 is repeated;

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

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

[0091] Specifically, S10 includes:

[0092] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0093] S2, passing the lower dry film through the center of the pressure roller and winding it around the rigid rod 1;

[0094] S3, using a dynamometer to pull the rigid rod 1;

[0095] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

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

[0098] Example 5

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

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

[0101] The rigid rod 1 is an aluminum rod with a length of 620 mm and a diameter of 8 mm. A first interface 11 with a slot structure is provided in the middle thereof. Both ends of the rigid rod 1 are provided with clamps 12 for fixing the dry film.

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

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

[0104] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0105] S2, passing the lower dry film through the center of the pressure roller and winding it around the rigid rod 1, and fixing it with the clamps 12 at both ends of the rigid rod 1;

[0106] S3, using the hook structure of the dynamometer to hook the slot structure at the center of the rigid rod 1 and pull;

[0107] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

[0109] This embodiment provides a device for measuring the tension of the tail of a dry film on a film laminating machine. By setting a clamp 12 on the aluminum rigid rod 1, the dry film can be clamped more firmly to prevent the dry film from slipping during the measurement process, thereby improving the 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 tensile gauge simplifies the operation steps and makes the measurement process more convenient and stable. The device has a compact structural design and is easy to operate. It is suitable for various film laminating machines and is convenient for practical application.

[0110] Example 6

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

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

[0113] The rigid rod 1 has connecting pieces 13 symmetrically extending from both ends of the rigid rod 1 along the outside, the connecting piece 13 and the rigid rod 1 form an isosceles triangle, and a first interface 11 is provided at the vertex of the isosceles triangle, and the first interface 11 is a clamping ring.

[0114] A tensile gauge, wherein a measuring end of the tensile gauge is a second interface with the hook structure;

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

[0116] S1, attaching the upper dry film to the upper guide block of the film laminating machine;

[0117] S2, pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod 1, the number of winding circles is three circles;

[0118] S3, clamping the hook structure on the dynamometer into the clamping ring, and using the dynamometer to pull the rigid rod 1;

[0119] S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block;

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

[0121] S21, if the measured tension value of the tail of the dry film is greater than the target tension range, the frequency of the fan is reduced, and steps S1 to S5 are repeated;

[0122] S22, if the measured tension value of the dry film tail 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 of the dry film tail is within the target tension range, the frequency of the fan is maintained.

[0124] This embodiment provides a device for measuring the tension of the tail of a dry film on a film laminating machine. The connectors 13 and the collar structure extending from both ends of the rigid rod 1 can be easily and quickly connected to the dynamometer and perform tension measurement even when the dry film is wound multiple times. Combined with the closed-loop control method of Example 4, the fan frequency can be adjusted in real time according to the measurement results to achieve more accurate and stable tension control, thereby improving the film laminating quality and production efficiency.

[0125] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a restriction. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in the subsequent accompanying drawings.

[0126] In addition, it should be noted that the use of terms such as "first" and "second" to limit is only for the convenience of distinction. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0127] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for measuring the tension of the tail of a dry film on a film laminating machine, characterized in that: The following steps are involved: S1, attaching the upper dry film to the upper guide block of the film laminating machine; S2, pass the lower dry film through the center of the pressure roller and wrap it around the rigid rod; S3, pulling the rigid rod using a dynamometer; S4, cutting off the lower dry film, so that the lower dry film is adsorbed on the lower guide block; S5. Use the tensile gauge to measure the tension value of the dry film.

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

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

5. The method for measuring the tension of the tail of a dry film on a film 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 of the tail of a dry film on a film laminating machine, characterized in that: The film laminating machine includes a fan with adjustable frequency; The method for controlling the tension of the tail of the dry film on the film laminating machine includes: S10, measuring the tail tension of the dry film using the method for measuring the tail tension of the dry film on the film laminating machine as described in any one of claims 1 to 5; S20, according to the measured dry film tension value, controlling the frequency of the fan so that the tension of the dry film tail is within the target tension range.

7. The method for controlling the tension of the tail of the dry film on the film laminating machine according to claim 6, characterized in that: The step S20 includes: S11, adjusting the frequency of the fan, repeating step S10, and measuring the dry film tension values ​​at different fan frequencies.

8. The method for controlling the tension of the tail of the dry film on the film laminating machine according to claim 6, characterized in that: The step S20 comprises: S21, if the measured tension value of the dry film tail is greater than the target tension range, the frequency of the fan is reduced and step S10 is repeated; S22, if the measured tension value of the dry film tail is less than the target tension range, increase the frequency of the fan and repeat step S10; S23. If the measured tension value of the dry film tail is within the target tension range, the frequency of the fan is maintained.

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

10. A device for measuring the tension of the tail of a dry film on a film laminating machine, characterized in that: The method for measuring the tail tension of a dry film on a laminating machine according to any one of claims 1 to 5, or the method for measuring the tail tension of a dry film on a laminating machine according to any one of claims 6 to 9, comprises: rigid rod and dynamometer; A first interface is provided at the middle of the rigid rod, and a second interface is provided at the measuring end of the dynamometer, and the first interface corresponds to the second interface.

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