Device and method for testing adhesive force of hot stamping film coating

Abstract

The invention discloses a hot stamping film coating adhesive force testing device which comprises a testing table, a transverse sliding table module is arranged at one end of the upper portion of the testing table in the horizontal direction, and a height sliding table module is arranged at the position, close to one end of the transverse sliding table module, of the testing table in the vertical direction. The transverse sliding table module is slidably provided with a sample table for placing a sample, the height sliding table module is slidably provided with a sensor assembly for fixing a to-be-tested film layer on the sample, a chip processor is arranged in the test board, and the transverse sliding table module, the height sliding table module and the sensor assembly are electrically connected with the chip processor. By specially designing the sample table for fixing the hot stamping film sample, the stability of the sample is remarkably enhanced during testing, the measurement error is effectively reduced, flexible adjustment within the range of 90-180 degrees can be realized according to material characteristics and use requirements, the test condition is ensured to be consistent with the actual application environment, and the test efficiency is improved. And the accuracy and practicability of the test result are further improved.

Description

Technical Field

[0001] This invention relates to the field of hot stamping film coating adhesion testing technology, and more particularly to a hot stamping film coating adhesion testing device and method. Background Technology

[0002] Hot stamping film is widely used for creating patterns on cigarette labels, wine labels, cosmetics, and fabrics. Hot stamping film typically consists of multiple layers, including a base film (such as polyester film), a release layer, a color layer (or holographic pattern layer), an aluminized layer, and a hot melt adhesive layer. Through heat and pressure (the hot stamping process), the metallic foil or holographic pattern on the hot stamping film is transferred to the surface of the substrate (such as paper, plastic, leather, etc.). The base film is then peeled off, forming a decorative layer with a glossy or three-dimensional effect. Because the substrate materials are diverse, including paper, plastic, glass, and metal, the adhesion between the metallic foil or holographic pattern on the hot stamping film and the base film needs to be within a suitable range to achieve the ideal transfer effect. Therefore, the testing and accuracy of the adhesion between hot stamping films has a significant impact on the application effect of the product.

[0003] Existing testing methods mainly involve tensile testing machines, such as... Figure 1 As shown, during the test, the film layer to be tested and the base film are clamped at both ends of the tensile testing machine, and the film layer is torn at a 180° angle. Because the sample is suspended and not fixed, the measured adhesive force fluctuates greatly. Furthermore, the fixed tear angle cannot be adjusted, making it difficult to meet the testing requirements. Therefore, this invention proposes a testing device and method for the adhesive force of hot stamping film coatings, providing a stable, fast, and angle-adjustable method and device for testing the adhesive force of hot stamping film composite layers. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for testing the adhesion of hot stamping film coatings, thereby solving the technical problems mentioned in the background section.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] This invention discloses a hot stamping film coating adhesion testing device, comprising a testing platform. A horizontal sliding stage module is horizontally arranged at one end of the upper part of the testing platform. A vertical sliding stage module is vertically arranged near one end of the horizontal sliding stage module. A sample stage for placing a sample is slidably mounted on the horizontal sliding stage module. A sensor assembly for fixing the film layer to be tested on the sample is slidably mounted on the vertical sliding stage module. A chip processor is disposed inside the testing platform. The horizontal sliding stage module, the vertical sliding stage module, and the sensor assembly are all electrically connected to the chip processor.

[0007] Furthermore, the transverse slide module includes a transverse slide, which is threadedly connected to a horizontal lead screw rotatably disposed on the upper part of the test platform, and the transverse slide is slidably limited to a horizontal guide rail fixedly disposed on the upper part of the test platform. The test platform is provided with a transverse slide module motor for driving the horizontal lead screw to rotate, and the sample stage is fixedly disposed on the upper part of the transverse slide.

[0008] Furthermore, the sample stage includes a base plate fixedly connected to the transverse slide. A carrying plate is detachably mounted on the upper middle part of the base plate. Two sets of knob seats are symmetrically arranged on both sides of the carrying plate on the upper part of the base plate. A knob is rotatably mounted on each knob seat. A connecting arm is provided between each knob and the knob seat. The two connecting arms on the same side are fixedly connected to the upper part of the pressing edge member used to fix the carrying plate.

[0009] Furthermore, the knob includes a screw section rotatably connected to the lower knob seat and a rotating part fixedly disposed on the upper part of the screw section. The knob seat has a limiting groove on the outer side of the screw section. The end of the connecting arm near the knob seat is threadedly connected to the screw section, and its outer side is slidably engaged with the limiting groove.

[0010] Furthermore, the height slide module includes a mounting bracket fixedly disposed at one upper end of the test platform, a height slide being slidably disposed on the mounting bracket in the vertical direction, the height slide being threadedly connected to a vertical lead screw rotatably disposed on the mounting bracket, and a height slide module motor for driving the vertical lead screw to rotate is fixedly disposed on the upper part of the mounting bracket; the sensor assembly is fixedly connected to the height slide.

[0011] Furthermore, the sensor assembly includes a U-shaped bracket fixedly connected to the height slide table. A rotating shaft is rotatably mounted on the bracket. A force sensor is fixedly mounted in the middle of the rotating shaft, and a sensor protective cover is fixedly mounted on the outside of the force sensor. The force sensor is fixedly connected to a clamp fixedly mounted on the outer end of the sensor protective cover. The clamp has a U-shaped cross-section, and a fixing rubber pad is fixedly mounted on the inner side of its base plate. A clamp adjustment knob is rotatably mounted on the top plate of the clamp, and the lower end of the clamp adjustment knob is rotatably connected to a movable rubber pad slidably mounted inside the clamp.

[0012] Furthermore, a scale is fixedly provided on one side of the bracket at the outer end of the rotating shaft, and the scale is provided with scale lines for marking angles. A pointer is fixedly provided on the outer side of the end of the rotating shaft corresponding to the scale.

[0013] Furthermore, an optical axis retainer is fixedly installed on the other side of the bracket, and the other end of the rotating shaft is inserted into the interior of the optical axis retainer. The optical axis retainer is provided with locking bolts for fixing the rotating shaft.

[0014] Furthermore, a display panel and a printer are provided at the other end of the upper part of the test platform, and both the display panel and the printer are electrically connected to the chip processor.

[0015] Furthermore, the present invention also discloses a method for testing the adhesion of hot stamping film coatings, which utilizes the aforementioned testing apparatus and includes the following steps:

[0016] Step a: Mount the hot stamping film sample onto the sample stage;

[0017] Step b: Peel off the hot stamping film to be tested and fix the end of the film to the clamp of the sensor assembly. Then adjust the rotating shaft to the angle to be tested. At this time, the pointer indicates the corresponding angle on the dial. At the same time, adjust the overall height of the sensor assembly through the height slide module to match the tear angle of the film to be tested.

[0018] Step c: Start the test. The horizontal slide module moves horizontally, and the height slide module adjusts the overall height of the sensor assembly in real time to maintain the stability of the tear angle. At the same time, the force sensor monitors the magnitude of the tensile force in real time. The chip processor inside the test bench integrates the displacement and tensile force data and displays the tensile force and displacement curves on the display panel in real time.

[0019] Step d: When the displacement reaches the preset value, the test will automatically stop. After the test, the built-in software of the chip processor will automatically process the data, calculate the average adhesive force of the film layer, compare it with the standard sample data in the database, give the analysis conclusion, and print out the results through the printer.

[0020] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0021] (1) Improved measurement accuracy: The present invention uses a specially designed sample stage for fixing hot stamping film samples, which significantly enhances sample stability during testing, effectively reduces measurement errors, and ensures the accuracy and reliability of data. In addition, the present invention reinforces the sample by using a sample stage to ensure that the base film and coating remain parallel during the stretching process, eliminating lateral deviation and ensuring that the state is consistent for each stretch, which greatly improves the consistency and repeatability of data.

[0022] (2) Adjustable separation angle: The present invention achieves convenient adjustment of the separation angle through the adjustable rotating shaft structure design. It can be flexibly adjusted within the range of 90°-180° according to the material characteristics and usage requirements, ensuring that the test conditions are consistent with the actual application environment, and further improving the accuracy and practicality of the test results.

[0023] (3) Real-time judgment of tensile results: The present invention introduces an automated detection system, establishes a tensile database, collects and compares data in real time, and provides preliminary judgment results in real time, which further improves the objectivity and timeliness of the measurement results, and supports printing and archiving of results.

[0024] (4) Improved ease of operation: This invention simplifies the testing process, enabling automated testing with a single click, significantly reducing operational difficulty and improving efficiency. Experiments show that operation time is reduced by 50%, significantly enhancing the user experience. Furthermore, this invention features an intelligent interface design that displays test progress and results in real time, allowing users to easily master the technology without specialized knowledge, further lowering the barrier to entry and improving operational convenience and system friendliness. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] Figure 1 This is a schematic diagram of existing technology when performing a 180° test.

[0027] Figure 2 This is a schematic diagram of the present invention during a 180° test;

[0028] Figure 3 This is a schematic diagram of the overall structure of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure from another perspective of the present invention;

[0030] Figure 5 This is a schematic diagram of the sample stage structure of the present invention;

[0031] Figure 6 This is a schematic diagram showing the connection between the sensor assembly and the height slide module of the present invention;

[0032] Figure 7 This is a schematic diagram of the sensor assembly structure of the present invention;

[0033] Figure 8 This is a schematic diagram of the sensor assembly of the present invention from another perspective;

[0034] Explanation of reference numerals in the attached drawings: 1. Test stage; 2. Adjustable support leg; 3. Lateral slide module; 4. Lateral slide; 5. Sample stage; 6. Substrate; 7. Carrier plate; 8. Knob seat; 9. Knob; 10. Connecting arm; 11. Edge clamping component; 12. Height slide module; 13. Mounting bracket; 14. Height slide; 15. Sensor assembly; 16. Bracket; 17. Rotating shaft; 18. Force sensor; 19. Sensor protective cover; 20. Clamp; 21.

[0035] 21. Fixed rubber pad; 22. Clamp adjustment knob; 23. Movable rubber pad; 24. Dial; 25. Pointer; 26. Optical axis retainer; 27. Operation button; 28. Display panel; 29. ​​Printer. Detailed Implementation

[0036] like Figures 3-8 As shown, a hot stamping film coating adhesion testing device and method includes a testing platform 1. Adjustable feet 2 are respectively provided at the four corners of the bottom plate of the testing platform 1 to facilitate the adjustment of the overall height and level of the testing platform.

[0037] A horizontal slide module 3 is provided at one end of the upper part of the test bench 1 along the horizontal direction. The horizontal slide module includes a horizontal slide 4. The horizontal slide 4 is threadedly connected to a horizontal lead screw rotatably mounted on the upper part of the test bench 1. The horizontal slide 4 is also slidably limited by a horizontal guide rail fixedly mounted on the upper part of the test bench. A displacement sensor is installed on the horizontal slide 4. A horizontal slide module motor for driving the horizontal lead screw to rotate is installed on the test bench 1.

[0038] A sample stage 5 for placing samples is slidably mounted on the transverse slide module 3, and the sample stage 5 is fixedly mounted on the upper part of the transverse slide 4. Specifically, the sample stage 5 includes a base plate 6 fixedly connected to the transverse slide 4. Threaded holes are respectively opened at the four corners of the base plate 6 and at corresponding positions on the transverse slide 4. The base plate 6 is fixedly mounted on the transverse slide 4 by connecting bolts that are compatible with the threaded holes. A carrier plate 7 is detachably mounted in the middle of the upper part of the base plate 6. Two sets of knob seats 8 are symmetrically mounted on both sides of the carrier plate 7 on the upper part of the base plate 6. A knob 9 is rotatably mounted on each knob seat 8. A connecting arm 10 is respectively provided between each knob 9 and the knob seat 8. The two connecting arms 10 located on the same side are fixedly connected to the upper part of the pressing edge member 11 used to fix the carrier plate 7.

[0039] In this embodiment, the knob 9 includes a screw section rotatably connected to the lower knob seat 8 and a rotating part fixedly disposed on the upper part of the screw section. The knob seat 8 has a limiting groove on the outer side of the screw section. The end of the connecting arm 10 near the knob seat 8 is threadedly connected to the screw section, and its outer side is slidably engaged with the limiting groove. When the knob 9 is rotated, the connecting arm 10 can slide linearly in the vertical direction.

[0040] During sample installation, the hot stamping film can be attached to the carrier plate 7 using double-sided tape. By rotating each knob 9, the pressure plates 11 on both sides can be loosened, and the carrier plate 7 with the hot stamping film sample attached can be placed in. Then, rotate each knob 9 in the opposite direction to make the pressure plate 11 press the carrier plate 7 and the hot stamping film on it firmly.

[0041] The test bench 1 has a height slide module 12 arranged vertically at one end near the horizontal slide module 3. The height slide module 12 includes a mounting bracket 13 fixedly installed at one end of the upper part of the test bench 1. A height slide 14 is slidably installed on the mounting bracket 13 in the vertical direction. The height slide 14 is threadedly connected to a vertical lead screw rotatably installed on the mounting bracket 13. A displacement sensor is installed on the height slide 14. A height slide module motor for driving the vertical lead screw rotation is fixedly installed on the upper part of the mounting bracket 13.

[0042] A sensor assembly 15 for fixing the film layer to be tested on the sample is installed on the height slide module 12. The sensor assembly 15 is fixedly connected to the height slide 14. Specifically, the sensor assembly 15 includes a U-shaped bracket 16 fixedly connected to the height slide 14. Corresponding threaded holes are opened on the bracket 16 and the height slide 14. The bracket 16 is fixedly installed on the height slide 14 by connecting bolts that are adapted to the threaded holes. A rotating shaft 17 is rotatably mounted on the bracket 16. A force sensor 18 is fixedly mounted in the middle of the rotating shaft 17, and a sensor protective cover 19 is fixedly provided on the outside of the force sensor 18. The force sensor 18 is fixedly connected to a clamp 20 fixedly installed on the outer end of the sensor protective cover 19. The chuck 20 has a U-shaped cross-section, and a fixing pad 21 is fixedly installed on the inner side of its base plate. A chuck adjustment knob 22 is rotatably installed on the top plate of the chuck 20, and the lower end of the chuck adjustment knob 22 is rotatably connected to a movable pad 23 that is slidably installed inside the chuck 20.

[0043] In this example, the clamp 20 of the sensor assembly 15 is used to fix the film layer to be tested. After the sample stage 5 fixes the hot stamping film, the film layer to be tested is peeled off and its end is fixed to the clamp 20. The force sensor 18 is responsible for recording the magnitude of the force when the film layer is torn. Figure 2 This diagram illustrates the testing of film adhesion at a 180° stretch angle. If testing at other stretch angles is required, the height slide module 12 and sensor assembly 15 can be adjusted to suitable positions before testing.

[0044] In this example, a scale 24 is fixedly installed on one side of the bracket 16 at the outer end of the rotating shaft 17. The scale 24 is provided with scale lines for marking angles. A pointer 25 is fixedly installed on the outer side of the rotating shaft 17 corresponding to the scale 24. During testing, the rotating shaft 23 is adjusted to the angle to be measured. At this time, the pointer 25 indicates the corresponding angle on the scale 24. At the same time, the height slide module 12 is adjusted so that the film layer to be measured and the force sensor 18 are in a straight line. The test is then performed at this angle.

[0045] Additionally, a light axis retainer 26 is bolted to the other side of the bracket 16. The other end of the rotating shaft 17 is inserted into the light axis retainer 26. A locking bolt for fixing the rotating shaft 17 is installed on the light axis retainer 26. The locking bolt is an internal hex bolt threaded into the light axis retainer 26. When adjusting the angle of the rotating shaft 17, the force sensor 18, and the chuck 20, the locking bolt can be loosened, allowing the rotating shaft 17 to rotate freely within the light axis retainer 26. After the angle adjustment is completed and determined, the locking bolt is screwed in with an internal hex wrench, and the light axis retainer 26 is reduced in size to lock the rotating shaft 17 in place.

[0046] The test bench 1 is equipped with a chip processor (not shown in the figure) inside, and an operation button 27 for controlling the start and stop of the motor is provided on the outside of the test bench 1. The transverse slide module motor, the displacement sensor on the transverse slide, the height slide module motor, the displacement sensor on the height slide, and the force sensor 18 on the sensor assembly are all electrically connected to the chip processor. The chip processor analyzes and processes the displacement and force data during the test process through built-in software, and the chip processor stores a tensile database, which can collect and compare test data in real time. The transverse slide module motor and the height slide module motor are both stepper motors. The chip processor can control the motor rotation speed in real time by controlling the number of motor pulses, thereby adjusting the movement speed of the corresponding slide.

[0047] In addition, a display panel 28 and a printer 29 are provided at the other end of the upper part of the test bench 1. Both the display panel 28 and the printer 29 are electrically connected to the chip processor. The display panel 28 is used to display test data in real time, and the printer 29 can print out the test structure.

[0048] This invention also discloses a method for testing the adhesion of hot stamping film coatings, which utilizes the aforementioned testing apparatus and includes the following steps:

[0049] Step a: Install the hot stamping film sample onto the sample stage 5;

[0050] Step b: Peel off the hot stamping film to be tested and fix its end on the clamp 20 of the sensor assembly 15. Then adjust the rotating shaft 17 to the angle to be tested. At this time, the pointer 25 indicates the corresponding angle on the scale 24. At the same time, adjust the overall height of the sensor assembly 15 through the height slide module 12 to match the tear angle of the film to be tested.

[0051] Step c: Start the test. The horizontal slide module 3 moves horizontally, and the height slide module 12 adjusts the overall height of the sensor assembly 15 in real time to maintain the stability of the tear angle. At the same time, the force sensor 18 monitors the magnitude of the tensile force in real time. After the chip processor inside the test stage 1 integrates the displacement and tensile force data, it displays the tensile force and displacement curves on the display panel 28 in real time.

[0052] Step d: When the displacement reaches the preset value, the test will automatically stop. After the test, the built-in software of the chip processor will automatically process the data, calculate the average adhesive force of the film layer, compare it with the standard sample data in the database, give the analysis conclusion, and print and output the results through printer 29.

[0053] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A device for testing the adhesion of hot stamping film coating, characterized in that: The test platform includes a horizontal sliding stage module at one end of its upper part, a vertical sliding stage module at one end near the horizontal sliding stage module, a sample stage for placing a sample slidably mounted on the horizontal sliding stage module, and a sensor assembly for fixing the film layer to be tested on the sample slidably mounted on the vertical sliding stage module. A chip processor is located inside the test platform, and the horizontal sliding stage module, the vertical sliding stage module, and the sensor assembly are all electrically connected to the chip processor.

2. The hot stamping film coating adhesion testing device according to claim 1, characterized in that: The transverse slide module includes a transverse slide, which is threadedly connected to a horizontal lead screw rotatably mounted on the upper part of the test platform. The transverse slide is also slidably limited by a horizontal guide rail fixedly mounted on the upper part of the test platform. A transverse slide module motor for driving the horizontal lead screw to rotate is provided on the test platform. The sample stage is fixedly mounted on the upper part of the transverse slide.

3. The hot stamping film coating adhesion testing device according to claim 2, characterized in that: The sample stage includes a base plate fixedly connected to the transverse slide. A carrying plate is detachably mounted on the upper middle part of the base plate. Two sets of knob seats are symmetrically arranged on both sides of the carrying plate on the upper part of the base plate. A knob is rotatably mounted on each knob seat. A connecting arm is provided between each knob and the knob seat. The two connecting arms on the same side are fixedly connected to the upper part of the pressing edge member used to fix the carrying plate.

4. The hot stamping film coating adhesion testing device according to claim 3, characterized in that: The knob includes a screw section rotatably connected to the lower knob seat and a rotating part fixedly disposed on the upper part of the screw section. The knob seat has a limiting groove on the outer side of the screw section. The end of the connecting arm near the knob seat is threadedly connected to the screw section, and its outer side is slidably engaged with the limiting groove.

5. The hot stamping film coating adhesion testing device according to claim 1, characterized in that: The height slide module includes a mounting bracket fixedly mounted on one upper end of the test platform. A height slide is slidably mounted on the mounting bracket in the vertical direction. The height slide is threadedly connected to a vertical lead screw rotatably mounted on the mounting bracket. A height slide module motor for driving the vertical lead screw rotation is fixedly mounted on the upper part of the mounting bracket. The sensor assembly is fixedly connected to the height slide.

6. The hot stamping film coating adhesion testing device according to claim 5, characterized in that: The sensor assembly includes a U-shaped bracket fixedly connected to the height slide. A rotating shaft is rotatably mounted on the bracket. A force sensor is fixedly mounted in the middle of the rotating shaft, and a sensor protective cover is fixedly mounted on the outside of the force sensor. The force sensor is fixedly connected to a clamp fixedly mounted on the outer end of the sensor protective cover. The clamp has a U-shaped cross-section, and a fixing rubber pad is fixedly mounted on the inner side of its base plate. A clamp adjustment knob is rotatably mounted on the top plate of the clamp, and the lower end of the clamp adjustment knob is rotatably connected to a movable rubber pad slidably mounted inside the clamp.

7. The hot stamping film coating adhesion testing device according to claim 6, characterized in that: A scale is fixedly installed on one side of the bracket at the outer end of the rotating shaft. The scale has graduations for marking angles. A pointer is fixedly installed on the outer side of the rotating shaft at the end corresponding to the scale.

8. The hot stamping film coating adhesion testing device according to claim 7, characterized in that: A light axis retainer is fixedly installed on the other side of the bracket, and the other end of the rotating shaft is inserted into the interior of the light axis retainer. The light axis retainer is provided with locking bolts for fixing the rotating shaft.

9. The hot stamping film coating adhesion testing device according to claim 1, characterized in that: A display panel and a printer are provided at the other end of the upper part of the test platform. Both the display panel and the printer are electrically connected to the chip processor.

10. A method for testing the adhesion of hot stamping film coating, using the testing apparatus described in claims 1-9, characterized in that: The work includes the following steps: Step a: Mount the hot stamping film sample onto the sample stage; Step b: Peel off the hot stamping film to be tested and fix the end of the film to the clamp of the sensor assembly. Then adjust the rotating shaft to the angle to be tested. At this time, the pointer indicates the corresponding angle on the dial. At the same time, adjust the overall height of the sensor assembly through the height slide module to match the tear angle of the film to be tested. Step c: Start the test. The horizontal slide module moves horizontally, and the height slide module adjusts the overall height of the sensor assembly in real time to maintain the stability of the tear angle. At the same time, the force sensor monitors the magnitude of the tensile force in real time. The chip processor inside the test bench integrates the displacement and tensile force data and displays the tensile force and displacement curves on the display panel in real time. Step d: When the displacement reaches the preset value, the test will automatically stop. After the test, the built-in software of the chip processor will automatically process the data, calculate the average adhesive force of the film layer, compare it with the standard sample data in the database, give the analysis conclusion, and print out the results through the printer.

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