A method and tool for testing the quality of glass silk printing

Abstract

This application discloses a testing method and testing tool for the quality of glass screen printing. The method steps are as follows: S1. Select testing tools and fix the screen-printed part; S2. Clay pot impact test: Clay pot impacts each heating zone 10 times from the test height, and checks for cracking; S3. Acidic substance test: Coat the heating zone with an acidic substance, heat at the highest setting for 10 minutes, repeat 3 times, and check for peeling; S4. Adhesive tape test: Stick adhesive tape to the screen printing ink area for 15 minutes and then pull it off, and check for adhesive tape ink residue; S5. Heating test: Place a flat-bottomed pan in the heating zone, boil water at the highest setting for 1 hour, replace with an empty flat-bottomed pan and continue heating for 20 minutes, and check for peeling; S6. Thermal shock test: Remove the screen-printed part from the heating component and pour room temperature water onto its surface, and check for cracking and peeling; S7. Dry burning cleaning test: Apply commonly used cooking food to the surface of the screen-printed part, and heat at 250℃ and 500℃ for 50 minutes each, and test the screen printing quality. The testing method in this application, through multi-dimensional and scenario-based test design, can achieve comprehensive verification of the performance of glass screen printed parts.

Description

Technical Field

[0001] This invention relates to the field of glass screen printing quality inspection technology, and in particular to a testing method and testing tool for glass screen printing quality. Background Technology

[0002] Glass screen-printed parts are widely used in kitchen appliances (such as crystallized glass panels for infrared ovens, induction cookers, and other heating appliances). Their quality directly affects the safety and lifespan of the products, therefore, their performance needs to be verified through specialized testing. However, traditional glass screen printing quality testing has significant shortcomings: on the one hand, testing tools lack standardized specifications and compatibility; for example, clamping mechanisms often cannot stably fix glass samples of different sizes, easily leading to testing errors due to sample displacement. On the other hand, the test scenario simulation is incomplete, failing to fully cover the key operating conditions in actual kitchen use, making it difficult to comprehensively evaluate product performance.

[0003] Existing testing methods for glass screen-printed parts are insufficient to verify their performance in the complex environment of a kitchen. They cannot guarantee the glass's impact resistance through precise heavy-object impact tests, nor can they fully simulate typical scenarios such as the synergy of acidic substances and high temperatures, alternating hot and cold temperatures, high-temperature dry burning, and stain cleaning to verify the acid resistance, ink adhesion, and integrity of the screen-printed pattern. Consequently, the test results cannot accurately reflect the reliability of the product in actual use, and faults such as glass breakage and screen printing peeling are prone to occur, making it difficult to meet product quality standards and usage requirements. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides a testing method and tool for glass screen printing quality, which accurately simulates a complex kitchen environment to ensure the objectivity and accuracy of quality testing for glass screen printed parts.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a method for testing the quality of glass screen printing, comprising the following steps:

[0006] S1. Select test equipment and fix the screen printing part: The test equipment includes a sample frame, a clamping mechanism, a clay pot, a heating component and tape. The clamping mechanism is set on the sample frame and is used to clamp the glass screen printing part to be tested.

[0007] S2. Clay pot impact test: The clay pot is impacted 10 times from the test height into each heating zone to check if the glass breaks.

[0008] S3, Acidic substance test: Apply acidic substance to the heating area, heat at the highest setting for 10 minutes, repeat 3 times, and check whether the screen-printed pattern peels off after cleaning.

[0009] S4. Tape test: Apply the tape to the screen printing ink area at room temperature for 15 minutes and then pull it off to check if there is any ink residue on the tape.

[0010] S5. Heating test: Place the flat-bottomed pan in the heating zone and boil water on the highest setting for 1 hour. Then replace it with an empty flat-bottomed pan and continue heating for 20 minutes. Check whether the screen printing ink peels off.

[0011] S6. Thermal shock test: Remove the screen-printed part from the heating component and pour room temperature water on its surface to test for glass breakage and screen printing ink peeling.

[0012] S7. Dry Burning Cleaning Test: Commonly used cooking foods are applied to the surface of the screen-printed parts, and the parts are heated at 250℃ and 500℃ for 50 minutes respectively. After cooling to 60℃, the parts are cleaned to test the screen printing quality.

[0013] By adopting the above technical solutions, the clamping mechanism in S1 can clamp glass screen-printed parts of different sizes, avoiding detection errors caused by sample displacement; the casserole in S2 impacts the heating zone from the test height, simulating a heavy object impact scenario in the kitchen, effectively testing the impact resistance of the glass and ensuring that the glass is not easily broken by impacts from casserole or similar items in actual use; S3 verifies the acid resistance of the screen-printed pattern in scenarios involving the combined effects of common acidic substances in the kitchen (such as vinegar, lemon juice, etc.) and high temperatures, preventing the screen-printed pattern from peeling off in acidic environments; S4 directly tests the adhesion of the screen-printed ink through an adhesive tape test, ensuring that the ink will not easily peel off during daily contact. The system simulates typical kitchen heating scenarios such as prolonged boiling and dry burning, verifying the stability of the screen printing under continuous high temperatures. S6 simulates extreme thermal shock scenarios involving heating followed by exposure to cold water, simultaneously testing the glass's thermal shock resistance and the screen printing's temperature difference resistance, preventing glass breakage or screen printing peeling caused by alternating hot and cold temperatures. S7 simulates high-temperature dry burning and common kitchen stains (such as olive oil and ketchup) adhesion and cleaning scenarios, verifying the integrity of the screen printing during harsh contamination and cleaning processes. Ultimately, this comprehensively ensures the reliability and durability of glass screen-printed parts in daily and extreme kitchen use environments, ensuring that the product meets quality standards and reducing the risk of malfunctions.

[0014] This application also discloses a glass screen printing quality testing tool, including a clamping mechanism in the testing method. The clamping mechanism includes a clamping component, a driving component, and a transmission component. Two sets of clamping components are symmetrically arranged on both sides of the sample frame. The clamping component includes an installation unit and a clamping unit. The installation unit includes a threaded rod, a limiting rod, and an installation block. The threaded rod and the limiting rod are rotatably mounted on the sample frame. The threaded rod is threadedly connected to the installation block, and the limiting rod is slidably engaged with the installation block. The installation unit is disposed on the installation block. The driving component is used to drive the threaded rod to rotate, and the transmission component controls the threaded rods on both sides to rotate synchronously, so that the two sets of installation units clamp the screen printing parts.

[0015] By adopting the above technical solution, after placing the glass screen print to be tested on the surface of the sample frame, the operator only needs to drive the threaded rod to rotate through the drive component, so that the threaded rods on both sides rotate synchronously. Since the threaded rod is threadedly connected to the mounting block and the limiting rod is slidably engaged with the mounting block, the mounting block is brought close to the sample frame so that the two sets of mounting units on both sides of the sample frame can cooperate and clamp the screen print to ensure the stability of the screen print during the testing process.

[0016] Furthermore, the clamping unit includes an outer semicircular plate, a middle semicircular plate, and an inner semicircular plate. The outer semicircular plate is rotatably connected to the top of the mounting block, the outer side of the middle semicircular plate is rotatably connected to the inner side of the outer semicircular plate, and the outer side of the inner semicircular plate is rotatably connected to the inner side of the middle semicircular plate. At least two inner semicircular plates are provided on the same side of the sample frame.

[0017] By adopting the above technical solution, as the mounting blocks on both sides approach each other, the outer, middle, and inner semicircular plates move synchronously with the mounting blocks. Ultimately, under the action of the mounting blocks, multiple inner semicircular plates are pressed tightly against the glass screen print to be tested, ensuring the stability of the screen print during the testing process. Since the outer, middle, and inner semicircular plates are all rotatably connected, the inner semicircular plates can swing slightly after contacting the edge of the glass screen print to be tested. This structural design facilitates the clamping unit's effective clamping of glass screen prints with different side shapes.

[0018] Furthermore, the inner side of the outer semicircular plate is provided with an outer arc notch and an outer arc groove. The outer arc notch mates with the outer side of the middle semicircular plate. The outer side of the middle semicircular plate is integrally formed with a middle arc-shaped protrusion that slides with the outer arc groove. The inner side of the middle semicircular plate is provided with a middle arc notch and a middle arc groove. The middle arc notch mates with the outer side of the inner semicircular plate. The outer side of the inner semicircular plate is integrally formed with an inner arc-shaped protrusion that slides with the middle arc groove.

[0019] By adopting the above technical solution, the middle semicircular plate is rotatably connected to the outer and inner semicircular plates, and the stability of the middle semicircular plate, outer and inner semicircular plates during use is guaranteed.

[0020] Furthermore, an inner arc recess is provided in the middle of the inner side of the inner semicircular plate, which is recessed towards the central arc recess, and a rubber sheet is attached and fixed to the inner side of the inner semicircular plate near the position of the inner arc recess.

[0021] By adopting the above technical solution, the rubber sheet is made of rubber material, which has good softness and a large coefficient of friction. The setting of the rubber sheet ensures the stability of the inner semi-circular plate in the screen printing process and reduces the clamping damage to the screen printing parts.

[0022] Furthermore, the sample frame is provided with a first mounting cavity and a second mounting cavity. The first mounting cavity is located adjacent to the threaded rod, and the second mounting cavity is located adjacent to the corner of the sample frame. There are two second mounting cavities. The transmission assembly includes a side transmission unit and a middle transmission unit. There are two side transmission units, which are symmetrically distributed on both sides of the sample frame. The side transmission unit includes a driving bevel gear, a driving rod, a driven bevel gear, and a main transmission bevel gear. The driving bevel gear is fixed to one end of the threaded rod and located in the first mounting cavity. The driving rod is rotatably mounted in the sample frame, and its two ends extend into the first mounting cavity and the second mounting cavity, respectively. The driven bevel gear is fixed to one end of the driving rod and located in the first mounting cavity, and meshes with the driving bevel gear. The main transmission bevel gear is fixed to the other end of the driving rod and located in the second mounting cavity. The middle transmission unit includes a driven rod and a driven bevel gear. The driven rod rotates in the sample frame, and its two ends extend into the two second mounting cavities, respectively. There are two driven bevel gears, which are fixed to both ends of the driven rod and mesh with the main transmission bevel gears on both sides of the sample frame, respectively.

[0023] By adopting the above technical solution, when the drive component drives the threaded rod to rotate, the active bevel gear rotates synchronously with the threaded rod. The active bevel gear drives the driven bevel gear meshing with it, the active rod fixed to the driven bevel gear, the main transmission bevel gear fixed to the active rod, the driven transmission bevel gear meshing with the main transmission bevel gear, and the driven rod fixed to the driven transmission bevel gear to all rotate. This causes the threaded rods on both sides of the sample frame to rotate synchronously, thereby causing the two mounting blocks to move closer or further apart, so as to clamp or release the glass screen printing parts on the sample frame.

[0024] Furthermore, the drive assembly includes a motor, a drive gear, and a driven gear. The motor is fixed to the sample frame, the drive gear is fixed to the output end of the motor, and there are two driven gears, which are respectively fixedly sleeved on two threaded rods. One of the driven gears meshes with the drive gear.

[0025] By adopting the above technical solution, after the staff starts the motor, it drives the drive gear to rotate, thereby causing the driven gear meshing with the drive gear and the threaded rod fixed to the driven gear to rotate. This causes the mounting blocks on both sides of the sample frame to move closer or further apart, thus completing the fixing or loosening action of the screen-printed part.

[0026] Furthermore, a first winding disc located within the first mounting cavity is fixedly sleeved on the threaded rod, and a second winding disc located within the first mounting cavity and a transmission gear located outside the sample frame are fixedly sleeved on the limiting rod. Two transmission gears are provided and are respectively fixedly sleeved on the two limiting rods, and the two transmission gears mesh with two driven gears respectively. Adsorption components are provided at the four corners of the sample frame. Each adsorption component includes a connecting cylinder, a suction cup, a piston body, a first spring, and a traction rope. The connecting cylinder is fixed to the bottom of the sample frame, and an exhaust pipe is provided on the side wall of the connecting cylinder near its lower end. The top of the suction cup is connected to the lower end of the connecting cylinder, and the piston body is disposed inside the connecting cylinder and slides with it. The first spring is fixed between the bottom of the sample frame and the top of the piston body. The sample frame has a channel for installing the traction rope. One end of the traction rope is fixed to the top of the piston body, and the other end of the traction rope is fixed to the first winding disc or the second winding disc.

[0027] By adopting the above technical solution, when fixing the screen-printed part, the sample frame is placed on the worktable, the bottom of the suction cup abuts against the worktable, and after the motor works, it drives the driven gear and the threaded rod to rotate, thereby causing the transmission gear meshing with the driven gear and the limiting rod fixed to the transmission gear to rotate, thus causing the first winding disc and the second winding disc to rotate, so that the traction ropes on both sides of the first mounting cavity are released from the first winding disc and the second winding disc respectively. The piston body blocks the exhaust pipe under the action of the first spring, ensuring the adsorption effect between the suction cup and the worktable and improving the stability of the screen-printed part during the testing process.

[0028] Furthermore, mounting plates are fixed on both sides adjacent to the sample frame and the threaded rod. Each mounting plate is equipped with a side limiting assembly, which includes a fixing block, a guide rail, a sliding block, a second spring, a connecting plate, a connecting column, a mounting cylinder, a sleeve, a limiting plate, and a tension spring. The fixing block and the guide rail are both fixed to the top of the mounting plate. There are two guide rails, which are symmetrically arranged, and the length direction of the guide rail is perpendicular to the axis of the threaded rod. The sliding block is slidably installed between the two guide rails, and the second spring is fixed between the sliding block and the fixing block. The two sides of the connecting plate abut against the sides of the two guide rails that are close to each other, and the side of the connecting plate away from the sample frame abuts against the sliding block. The mounting cylinder is sleeved on the connecting column and slidably fitted. Its lower end abuts against the top of the guide rail, and the side wall of the sleeve fits against the inner wall of the mounting cylinder. The diameter of the limiting plate is larger than the outer diameter of the sleeve, and its bottom surface is fixed to the upper end of the sleeve. The two ends of the tension spring are fixed to the bottom of the limiting plate and the bottom wall of the inner wall of the mounting cylinder, respectively.

[0029] By adopting the above technical solution, under the action of the second spring and the sliding block, the outer wall of the mounting cylinder abuts against the end of the glass screen printing part; under the action of the tension spring, the bottom of the limiting plate abuts against the edge of the glass screen printing part, further enhancing the stability of the glass screen printing part during use.

[0030] Furthermore, the top of the mounting block is provided with a mounting groove, and a movable block that slides and engages with it is provided in the mounting groove. A rotating shaft that is rotatably connected to the movable block is fixed on the outer semicircular plate. A pressure sensor is fixed on the inner wall of the mounting groove on the side away from the sample frame. The side of the pressure sensor that is close to the sample frame abuts against the movable block. A controller that is electrically connected to both the pressure sensor and the motor is provided on the sample frame.

[0031] By adopting the above technical solution, during the clamping process of the clamping unit clamping the glass screen printing parts, the clamping unit transmits force to the movable block through the rotating shaft. The pressure sensor can monitor the pressure applied to the movable block in real time, and the monitoring result is transmitted to the controller in the form of an electrical signal. When the pressure is greater than the preset value, the controller controls the motor to stop running immediately, thus avoiding damage to the glass screen printing parts due to over-clamping by the clamping unit.

[0032] In summary, the present invention has the following beneficial effects:

[0033] 1. In this application, the clamping mechanism in S1 can clamp glass screen-printed parts of different sizes to be tested, avoiding detection errors caused by sample displacement; the casserole in S2 impacts the heating zone from the test height, simulating the impact scenario of heavy objects in the kitchen, effectively testing the impact resistance of the glass, and ensuring that the glass is not easily broken by the impact of the casserole in actual use; S3 is designed for the synergistic effect of common acidic substances in the kitchen (such as vinegar, lemon juice, etc.) and high temperature, which can verify the acid resistance of the screen-printed pattern and prevent the screen-printed pattern from peeling off in acidic environments; S4 directly tests the adhesion of the screen-printed ink through the tape adhesion test, ensuring that the ink will not easily fall off during daily contact; S5 simulates typical kitchen heating scenarios such as prolonged boiling and dry burning, which can verify the stability of the screen printing under continuous high temperature; S6 simulates the extreme thermal shock scenario of heating followed by exposure to cold water, which can simultaneously test the glass's thermal shock resistance and the screen printing's temperature difference resistance, avoiding glass breakage or screen printing peeling caused by alternating hot and cold temperatures; S7 simulates high-temperature dry burning and the adhesion and cleaning of common kitchen stains (such as olive oil, ketchup, etc.), which can verify the integrity of the screen printing during harsh pollution and cleaning processes, ultimately ensuring the reliability and durability of glass screen-printed parts in daily and extreme kitchen use environments, ensuring that the product meets quality standards, and reducing the risk of use failure;

[0034] 2. In this application, during the clamping process of the clamping unit clamping the glass screen printing part, the clamping unit transmits force to the movable block through the rotating shaft. The pressure sensor can monitor the pressure applied to the movable block in real time, and the monitoring result is transmitted to the controller in the form of an electrical signal. When the pressure is greater than the preset value, the controller controls the motor to stop running immediately, thus avoiding damage to the glass screen printing part due to excessive clamping by the clamping unit. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the sample frame in Embodiment 1 of the present invention;

[0036] Figure 2 This is a schematic diagram of the screen-printed part being fixed on the sample frame in Embodiment 1 of the present invention;

[0037] Figure 3 This is a schematic diagram of the impact test of a clay pot in Embodiment 1 of the present invention;

[0038] Figure 4 This is a schematic diagram of the heating zone of the screen-printed part in Embodiment 1 of the present invention;

[0039] Figure 5 This is a schematic diagram of the screen-printed part after being coated with an acidic substance in Embodiment 1 of the present invention;

[0040] Figure 6 This is a schematic diagram of the acidic substance test in Example 1 of the present invention;

[0041] Figure 7 This is a schematic diagram after testing with acidic substances in Example 1 of the present invention;

[0042] Figure 8 This is a schematic diagram of the tape test performed in Embodiment 1 of the present invention;

[0043] Figure 9 This is a schematic diagram of a 1-hour boiling water test conducted according to Embodiment 1 of the present invention;

[0044] Figure 10 This is a schematic diagram of heating an empty pot for 20 minutes according to Embodiment 1 of the present invention;

[0045] Figure 11 This is a schematic diagram of Embodiment 1 of the present invention before thermal shock testing;

[0046] Figure 12 This is a schematic diagram of the thermal shock test performed in Embodiment 1 of the present invention;

[0047] Figure 13 This is a schematic diagram of the first step of the 250℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0048] Figure 14 This is a schematic diagram of the second step of the 250℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0049] Figure 15 This is a schematic diagram of the third step of the 250℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0050] Figure 16 This is a schematic diagram of the first step of the 500℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0051] Figure 17This is a schematic diagram of the second step of the 500℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0052] Figure 18 This is a schematic diagram of the third step of the 500℃ infrared furnace dry-burning cleaning test in Embodiment 1 of the present invention;

[0053] Figure 19 This is a schematic diagram of the cleaning test of the heating oil in an induction cooker according to Embodiment 1 of the present invention;

[0054] Figure 20 This is a schematic diagram of the cleaning test of the heating oil in an induction cooker according to Embodiment 1 of the present invention;

[0055] Figure 21 This is a schematic diagram of the clamping mechanism fixing the screen-printed part to the sample frame in Embodiment 2 of the present invention;

[0056] Figure 22 yes Figure 21 A structural diagram from another perspective;

[0057] Figure 23 This is a schematic diagram of the structure of the clamping mechanism in Embodiment 2 of the present invention;

[0058] Figure 24 yes Figure 23 Enlarged view of point A in the middle;

[0059] Figure 25 This is a schematic diagram of the adsorption component used to highlight the structure of Embodiment 2 of the present invention;

[0060] Figure 26 yes Figure 25 Enlarged view of point B in the middle;

[0061] Figure 27 yes Figure 25 Enlarged view of point C in the middle;

[0062] Figure 28 This is a schematic diagram of the structure of the side limiting component used in Embodiment 2 of the present invention;

[0063] Figure 29 This is a schematic diagram of the structure of the pressure sensor used in Embodiment 3 of the present invention.

[0064] In the diagram: 1. Clamping mechanism; 11. Clamping assembly; 111. Mounting unit; 1111. Threaded rod; 1112. Limiting rod; 1113. Mounting block; 112. Clamping unit; 1121. Outer semicircular plate; 11211. Outer arc recess; 11212. Outer arc groove; 1122. Middle semicircular plate; 11221. Middle arc protrusion; 11222. Middle arc recess; 11223. Middle arc groove; 1123. Inner semicircular plate; 11231. Inner arc protrusion; 11232. Inner arc recess; 11233. Rubber sheet; 12. Drive assembly; 121. Motor; 122. Drive gear; 123. Driven gear; 13. Transmission assembly; 131. Side transmission unit; 1311. Drive bevel gear; 1312. Drive rod; 1313. Driven bevel gear; 1314, Main drive bevel gear; 132, Middle drive unit; 1321, Driven rod; 1322, Driven bevel gear; 2, Sample frame; 21, First mounting cavity; 22, Second mounting cavity; 23, Channel; 3, First winding disc; 4, Second winding disc; 5, Adsorption assembly; 51, Connecting cylinder; 511, Exhaust pipe; 52, Suction cup; 53, Piston body; 54, First spring; 55, Traction rope; 6, Mounting plate; 7, Side limiting assembly; 71, Fixing block; 72, Guide rail; 73, Sliding block; 74, Second spring; 75, Connecting plate; 76, Connecting column; 77, Mounting cylinder; 78, Sleeve; 79, Limiting plate; 80, Tension spring; 8, Mounting groove; 81, Pressure sensor; 9, Movable block; 91, Rotating shaft; 10, Transmission gear. Detailed Implementation

[0065] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Example 1

[0066] like Figure 1 and Figure 2 As shown in the figure, this application discloses a method for testing the quality of glass screen printing, the steps of which are as follows:

[0067] S1. Select test equipment and fix the screen print: The test equipment includes a sample frame, a clamping mechanism, a copper or aluminum casserole with a bottom diameter of 12±1cm, a heating component (including an infrared furnace, a heating furnace, and an induction cooker), and transparent tape. Place the glass screen print to be tested on the appropriate sample frame. In this embodiment, the clamping mechanism consists of four clips with foam adhesive inside, which are used to clamp and fix the glass screen print to be tested on the sample frame to ensure that the screen print is stable and does not shift.

[0068] S2, Clay Pot Impact Test: Combined with Figure 3 and Figure 4 As shown, a clay pot containing 1.5-2.0 kg of sand was impacted 10 times from a height of 15 cm onto each heating zone of the screen-printed part. After the impact, the glass was checked for cracks.

[0069] S3, Acidic Substance Test: Combined with Figure 5 , Figure 6 and Figure 7 As shown, different types of acidic substances are evenly coated on the screen printing area of ​​the screen-printed part (it is necessary to ensure that the screen printing area is within the infrared furnace heating area). The infrared furnace heating power is adjusted to the maximum level, and the screen printing part is heated for 10 minutes. This is repeated 3 times. After heating, the screen printing part is cleaned and dried. Check whether the screen printing pattern on the glass surface is peeling off.

[0070] S4, Tape Test: Combined with Figure 8 As shown, at room temperature, a transparent 3M ISO TAPE T1079358 tape was applied to the screen printing ink area for 15 minutes and then pulled up. The tape was immediately pulled up to check whether there was any ink residue on the tape.

[0071] S5, Heating Test: Combined with Figure 9 As shown, place the screen-printed part on the heating furnace, and place a horizontally sized pot filled with water in the heating zone; adjust the heating furnace power to the maximum setting, and continuously heat and boil the water for 1 hour; then combine... Figure 10 As shown, after boiling the water, remove the horizontal-bottomed pot and replace it with an empty flat-bottomed pot. Continue heating the pot at the highest setting for 20 minutes. After heating, check the screen printing ink on the glass surface for any peeling.

[0072] S6, Thermal Shock Test: Combined with Figure 11 and Figure 12 As shown, remove the screen-printed part from the heating furnace after the heating test (to prevent water from entering the furnace due to cracking); measure 20ml of room temperature water at 20℃±5℃ and pour it onto the surface of the screen-printed part; then check whether the glass of the screen-printed part is broken and whether the screen-printed ink on the glass surface is peeling off.

[0073] S7. Dry Burning Cleaning Test: This test includes three specific methods, as follows:

[0074] 1) 250℃ infrared furnace dry-burning cleaning test: combined with Figure 13 As shown, the first step involves applying the following ingredients in sequence to different areas of the screen-printed material: 1. olive oil, 2. vegetable oil, 3. chili sauce, 4. lemon juice, 5. vinegar, 6. flour, 7. tomato sauce, 8. milk, and 9. salt water (for common cooking foods); then... Figure 14As shown, the second step is to adjust the infrared oven to level 2 (maximum temperature approximately 250℃) and heat the stains on the screen-printed part for 50 minutes; combined with Figure 15 As shown, the third step is to turn off the infrared furnace and wait for the glass surface temperature to drop to about 60°C; the fourth step is to clean the glass surface with a non-abrasive cleaner and wipe off the cleaner and stains with a damp soft cloth, and then check the screen printing quality.

[0075] 2) 500℃ infrared furnace dry-burning cleaning test: combined with Figure 16 As shown, the first step involves applying the following ingredients in sequence to different areas of the screen-printed material: 1. olive oil, 2. vegetable oil, 3. chili sauce, 4. lemon juice, 5. vinegar, 6. flour, 7. tomato sauce, 8. milk, and 9. salt water (for common cooking foods); then... Figure 17 As shown, the second step is to set the infrared furnace to its highest setting (maximum temperature approximately 500℃) and heat the stains on the screen-printed surface for 50 minutes; combined with Figure 18 As shown, the third step is to turn off the infrared furnace and wait for the glass surface temperature to drop to about 60°C; the fourth step is to clean the glass surface with a non-abrasive cleaner and wipe off the cleaner and stains with a damp soft cloth, and then check the screen printing quality.

[0076] 3) Induction Cooker Heating Oil Cleaning Test: First, place a frying pan containing 250 ml of vegetable oil in the cooking area of ​​the screen-printed part, and set the induction cooker to maximum power until the oil temperature in the pan reaches ≥200℃. Second, take 1 flour solution, 2 milk, 3 eggs, 4 ketchup, and 5 chocolate (test materials) and place them in different positions of the heating cooking area of ​​the screen-printed part. Move the hot pan back and forth on the test materials 5 times to ensure that the materials are evenly distributed in the cooking area. Third, place the frying pan containing oil back in the cooking area, and keep the induction cooker running at maximum power for 10 minutes. Fourth, after the cooking area cools to room temperature, clean the cooking area with a soft cloth or sponge. If necessary, use a cleaning agent. If there is a crust, first remove the crust with a blade scraper, and then clean it again with a soft cloth or sponge (with cleaning agent if necessary). After that, test the screen printing quality.

[0077] S8. Test Result Processing: Fill all the above test results into the "Microcrystalline Glass Screen Printing Performance Test Report"; S2-S6 is a group of system tests. If any unqualified phenomenon occurs during the test, the laboratory must select a product produced at the same time as the test piece for repeated testing; if the retest passes, the product produced in that shift is considered qualified; if the retest still fails, the quality control personnel must be notified to lock the batch of products, and the quality control department will conduct enhanced testing to finally confirm whether the batch of products can be shipped.

[0078] It should be noted that: the clamping mechanism in S1 can hold glass screen-printed parts of different sizes to be tested, avoiding detection errors caused by sample displacement; the casserole in S2 impacts the heating zone from the test height, simulating a heavy object impact scenario in the kitchen, effectively testing the impact resistance of the glass and ensuring that the glass is not easily broken by impacts from casserole or other objects in actual use; S3 is designed for scenarios involving the combined action of common acidic substances in the kitchen (such as vinegar, lemon juice, etc.) and high temperature, which can verify the acid resistance of the screen-printed pattern and prevent the screen-printed pattern from peeling off in acidic environments; S4 directly tests the adhesion of the screen-printed ink through the tape adhesion test, ensuring that the ink will not easily peel off during daily contact; S5 simulates typical kitchen heating scenarios such as prolonged boiling and dry burning, verifying the stability of the screen printing under continuous high temperatures; S6 simulates extreme thermal shock scenarios such as heating followed by exposure to cold water, simultaneously testing the glass's thermal shock resistance and the screen printing's temperature difference resistance, preventing glass breakage or screen printing peeling caused by alternating hot and cold temperatures; S7 simulates high-temperature dry burning and common kitchen stains (such as olive oil, ketchup, etc.) adhesion and cleaning scenarios, verifying the integrity of the screen printing during harsh pollution and cleaning processes, ultimately comprehensively ensuring the reliability and durability of glass screen-printed parts in daily and extreme kitchen use environments, ensuring that the product meets quality standards, and reducing the risk of use failure. Example 2

[0079] like Figure 21 , Figure 22 and Figure 23 As shown, this embodiment discloses a glass screen printing quality testing tool, including a clamping mechanism 1 in a glass screen printing quality testing method (the clamping mechanism 1 in this embodiment replaces the four clamps in embodiment 1). Specifically, the clamping mechanism 1 includes a clamping assembly 11, a driving assembly 12, and a transmission assembly 13. The clamping assembly 11 has two sets symmetrically arranged on both sides of the sample frame 2. The clamping assembly 11 includes a mounting unit 111 and a clamping unit 112. The mounting unit 111 includes a threaded rod 111. 1. Limiting rod 1112 and mounting block 1113, threaded rod 1111 and limiting rod 1112 are rotatably mounted on sample frame 2. Threaded rod 1111 is threadedly connected to mounting block 1113, and limiting rod 1112 is slidably engaged with mounting block 1113. Mounting unit 111 is set on mounting block 1113. Driving component 12 is used to drive threaded rod 1111 to rotate. Transmission component 13 controls threaded rods 1111 on both sides to rotate synchronously, so that the two sets of mounting units 111 clamp the screen printing parts.

[0080] After placing the screen-printed glass component to be tested on the surface of the sample frame 2, the operator only needs to drive the threaded rod 1111 to rotate through the drive component 12, so that the threaded rods 1111 on both sides rotate synchronously. Since the threaded rod 1111 is threadedly connected to the mounting block 1113, and the limiting rod 1112 is slidably engaged with the mounting block 1113, the mounting block 1113 is brought close to the sample frame 2, so that the two sets of mounting units 111 on both sides of the sample frame 2 cooperate and clamp the screen-printed component, so as to ensure the stability of the screen-printed component during the testing process.

[0081] like Figure 24 , Figure 25 and Figure 26 As shown, the clamping unit 112 includes an outer semicircular plate 1121, a middle semicircular plate 1122, and an inner semicircular plate 1123. The outer semicircular plate 1121 is rotatably connected to the top of the mounting block 1113. The outer side of the middle semicircular plate 1122 is rotatably connected to the inner side of the outer semicircular plate 1121. The outer side of the inner semicircular plate 1123 is rotatably connected to the inner side of the middle semicircular plate 1122. At least two inner semicircular plates 1123 are provided on the same side of the sample frame 2.

[0082] As the mounting blocks 1113 on both sides move closer to each other, the outer semicircular plate 1121, the middle semicircular plate 1122, and the inner semicircular plate 1123 move synchronously with the mounting blocks 1113. Finally, under the action of the mounting blocks 1113, the multiple inner semicircular plates 1123 are pressed against the glass screen printing part to be tested, ensuring the stability of the screen printing part during the testing process. Since the outer semicircular plate 1121, the middle semicircular plate 1122, and the inner semicircular plate 1123 are all rotatably connected, the inner semicircular plate 1123 can swing slightly after it comes into contact with the edge of the glass screen print to be tested. This structural design makes it easier for the clamping unit 112 to effectively clamp glass screen prints with different side shapes. (Currently, the mainstream glass screen prints to be tested are usually rectangular. However, in order to meet the needs of different users and actual use scenarios, some other shapes of glass screen prints have appeared on the market, such as round and elliptical. The design of the outer semicircular plate 1121, the middle semicircular plate 1122, and the inner semicircular plate 1123 is more advantageous when fixing such glass screen prints.)

[0083] The inner side of the outer semicircular plate 1121 is provided with an outer arc recess 11211 and an outer arc groove 11212. The outer arc recess 11211 mates with the outer side of the middle semicircular plate 1122. The outer side of the middle semicircular plate 1122 is integrally formed with a middle arc-shaped protrusion 11221 that slides with the outer arc groove 11212. The inner side of the middle semicircular plate 1122 is provided with a middle arc recess 11222 and a middle arc groove 11223. The middle arc recess 11222 mates with the outer side of the inner semicircular plate 1123. The outer side of the inner semicircular plate 1123 is integrally formed with an inner arc-shaped protrusion 11231 that slides with the middle arc groove 11223.

[0084] This ensures that the middle semicircular plate 1122 is rotatably connected to the outer semicircular plate 1121 and the inner semicircular plate 1123, and guarantees the stability of the middle semicircular plate 1122, the outer semicircular plate 1121 and the inner semicircular plate 1123 during use.

[0085] The inner semicircular plate 1123 has an inner arc recess 11232 recessed towards the central arc recess 11222 at its inner center. A rubber sheet 11233 is attached and fixed to the inner side of the inner semicircular plate 1123 adjacent to the inner arc recess 11232. The rubber sheet 11233 is made of rubber material, which has good flexibility and a large coefficient of friction. The rubber sheet 11233 ensures the stability of the inner semicircular plate 1123 during the screen printing process and reduces clamping damage to the screen printed parts.

[0086] like Figure 23 , Figure 24 and Figure 25 As shown, the sample frame 2 is provided with a first mounting cavity 21 and a second mounting cavity 22. The first mounting cavity 21 is located adjacent to the threaded rod 1111, and the second mounting cavity 22 is located adjacent to the corner of the sample frame 2, and there are two second mounting cavities 22. The transmission assembly 13 includes a side transmission unit 131 and a middle transmission unit 132. There are two side transmission units 131, which are symmetrically distributed on both sides of the sample frame 2. The side transmission unit 131 includes a driving bevel gear 1311, a driving rod 1312, a driven bevel gear 1313, and a main transmission bevel gear 1314. The driving bevel gear 1311 is fixed to one end of the threaded rod 1111 and located in the first mounting cavity 21. The driving rod 1312 is rotatably mounted in the sample frame 2. The two ends of the moving rod 1312 extend into the first mounting cavity 21 and the second mounting cavity 22, respectively. The driven bevel gear 1313 is fixed to one end of the moving rod 1312 and located in the first mounting cavity 21, and meshes with the driving bevel gear 1311. The main drive bevel gear 1314 is fixed to the other end of the moving rod 1312 and located in the second mounting cavity 22. The middle transmission unit 132 includes a driven rod 1321 and a driven bevel gear 1322. The driven rod 1321 rotates within the sample frame 2, and its two ends extend into the two second mounting cavities 22, respectively. There are two driven bevel gears 1322, which are fixed to the two ends of the driven rod 1321, and mesh with the main drive bevel gears 1314 on both sides of the sample frame 2, respectively.

[0087] When the drive assembly 12 drives the threaded rod 1111 to rotate, the drive bevel gear 1311 rotates synchronously with the threaded rod 1111. The drive bevel gear 1311 drives the driven bevel gear 1313 meshing with it, the drive rod 1312 fixed with the driven bevel gear 1313, the main drive bevel gear 1314 fixed with the drive rod 1312, the driven drive bevel gear 1322 meshing with the main drive bevel gear 1314, and the driven rod 1321 fixed with the driven drive bevel gear 1322 to rotate. This causes the threaded rods 1111 on both sides of the sample frame 2 to rotate synchronously, thereby causing the two mounting blocks 1113 to move closer or further apart, so as to clamp or release the glass screen printing parts on the sample frame 2.

[0088] The drive assembly 12 includes a motor 121, a drive gear 122, and a driven gear 123. The motor 121 is fixed to the sample frame 2. The drive gear 122 is fixed to the output end of the motor 121. Two driven gears 123 are provided and are respectively fixedly sleeved on two threaded rods 1111. One of the driven gears 123 meshes with the drive gear 122. When the operator starts the motor 121, it drives the drive gear 122 to rotate, thereby causing the driven gear 123 meshing with the drive gear 122 and the threaded rod 1111 fixed to the driven gear 123 to rotate. This causes the mounting blocks 1113 on both sides of the sample frame 2 to move closer or further apart, completing the fixing or loosening action of the screen-printed part.

[0089] Combination Figure 27 As shown, a first winding disc 3 located in the first mounting cavity 21 is fixedly sleeved on the threaded rod 1111, and a second winding disc 4 located in the first mounting cavity 21 and a transmission gear 10 located outside the sample frame 2 are fixedly sleeved on the limiting rod 1112. There are two transmission gears 10, which are respectively fixedly sleeved on the two limiting rods 1112, and the two transmission gears 10 mesh with two driven gears 123 respectively. Adsorption components 5 are provided at the four corners of the sample frame 2. Each adsorption component 5 includes a connecting cylinder 51, a suction cup 52, a piston body 53, and a first winding disc 4 located in the first mounting cavity 21. A spring 54 and a traction rope 55 are provided; a connecting tube 51 is fixed to the bottom of the sample frame 2, and an exhaust pipe 511 is provided on the side wall of the connecting tube 51 near its lower end; the top of the suction cup 52 is connected to the lower end of the connecting tube 51, and the piston body 53 is disposed in the connecting tube 51 and slides with it; the first spring 54 is fixed between the bottom of the sample frame 2 and the top of the piston body 53, and the sample frame 2 is provided with a channel 23 for the installation of the traction rope 55. One end of the traction rope 55 is fixed to the top of the piston body 53, and the other end of the traction rope 55 is fixed to the first winding reel 3 or the second winding reel 4.

[0090] When fixing the screen-printed part, the sample frame 2 is placed on the workbench, and the bottom of the suction cup 52 abuts against the workbench. After the motor 121 is working, it drives the driven gear 123 and the threaded rod 1111 to rotate, thereby causing the transmission gear 10 meshing with the driven gear 123 and the limiting rod 1112 fixed to the transmission gear 10 to rotate. This causes the first winding disc 3 and the second winding disc 4 to rotate, so that the traction ropes 55 on both sides of the first mounting cavity 21 are released from the first winding disc 3 and the second winding disc 4 respectively. The piston body 53 blocks the exhaust pipe 511 under the action of the first spring 54, ensuring the adsorption effect between the suction cup 52 and the workbench and improving the stability of the screen-printed part during the testing process.

[0091] like Figure 25 , Figure 27 and Figure 28 As shown, mounting plates 6 are fixed on both sides of the sample frame 2 adjacent to the threaded rod 1111. Each mounting plate 6 is provided with a side limiting assembly 7, which includes a fixing block 71, a guide rail 72, a sliding block 73, a second spring 74, a connecting plate 75, a connecting post 76, a mounting cylinder 77, a sleeve 78, a limiting plate 79, and a tension spring 80. The fixing block 71 and the guide rail 72 are both fixed to the top of the mounting plate 6. There are two guide rails 72 arranged symmetrically, and the length direction of the guide rail 72 is perpendicular to the axis of the threaded rod 1111. The sliding block 73 is slidably mounted on the two guide rails. Between the rails 72, the second spring 74 is fixed between the sliding block 73 and the fixed block 71; the two sides of the connecting plate 75 abut against the sides of the two guide rails 72 that are close to each other, and the side of the connecting plate 75 away from the sample frame 2 abuts against the sliding block 73; the mounting cylinder 77 is sleeved on the connecting column 76 and slides, with its lower end abutting against the top of the guide rail 72, and the side wall of the sleeve 78 fitting against the inner wall of the mounting cylinder 77; the diameter of the limiting plate 79 is larger than the outer diameter of the sleeve 78, and its bottom surface is fixed to the upper end of the sleeve 78, and the two ends of the tension spring 80 are fixed to the bottom of the limiting plate 79 and the inner bottom wall of the mounting cylinder 77, respectively.

[0092] Under the action of the second spring 74 and the sliding block 73, the outer wall of the mounting cylinder 77 abuts against the end of the glass screen printing part; under the action of the tension spring 80, the bottom of the limiting plate 79 abuts against the edge of the glass screen printing part, further enhancing the stability of the glass screen printing part during use. Example 3

[0093] The only difference between this embodiment and Embodiment 2 is that: Figure 23 , Figure 24 and Figure 29As shown, the mounting block 1113 has a mounting groove 8 on its top, and a movable block 9 that slides within the mounting groove 8 is mounted therein. A rotating shaft 91, rotatably connected to the movable block 9, is fixed on the outer semicircular plate 1121. A pressure sensor 81 is fixed on the inner wall of the mounting groove 8 on the side away from the sample frame 2. The side of the pressure sensor 81 closest to the sample frame 2 abuts against the movable block 9. A controller (not shown in the figure) is mounted on the sample frame 2 and electrically connected to both the pressure sensor 81 and the motor 121. During the clamping process of the clamping unit 112 clamping the glass screen printing part, the clamping unit 112 transmits force to the movable block 9 through the rotating shaft 91. The pressure sensor 81 can monitor the pressure applied to the movable block 9 in real time, and the monitoring result is transmitted to the controller in the form of an electrical signal. When the pressure exceeds the preset value, the controller controls the motor 121 to stop running immediately, avoiding damage to the glass screen printing part due to over-clamping by the clamping unit 112.

[0094] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A glass screen printing quality testing tool, characterized in that, The clamping mechanism is used to clamp the glass screen print to be tested. The clamping mechanism (1) includes a clamping component (11), a driving component (12) and a transmission component (13). The clamping component (11) is provided in two sets and symmetrically arranged on both sides of the sample frame (2). The clamping component (11) includes an installation unit (111) and a clamping unit (112). The mounting unit (111) includes a threaded rod (1111), a limiting rod (1112), and a mounting block (1113). The threaded rod (1111) and the limiting rod (1112) are rotatably mounted on the sample frame (2). The threaded rod (1111) is threadedly connected to the mounting block (1113), and the limiting rod (1112) is slidably engaged with the mounting block (1113). The mounting unit (111) is set on the mounting block (1113). The drive assembly (12) is used to drive the threaded rod (1111) to rotate, and the transmission assembly (13) controls the threaded rods (1111) on both sides to rotate synchronously so that the two sets of mounting units (111) can clamp the screen printing parts. The clamping unit (112) includes an outer semicircular plate (1121), a middle semicircular plate (1122) and an inner semicircular plate (1123). The outer semicircular plate (1121) is rotatably connected to the top of the mounting block (1113). The outer side of the middle semicircular plate (1122) is rotatably connected to the inner side of the outer semicircular plate (1121). The outer side of the inner semicircular plate (1123) is rotatably connected to the inner side of the middle semicircular plate (1122). At least two inner semicircular plates (1123) are provided on the same side as the sample frame (2). The inner side of the outer semicircular plate (1121) is provided with an outer arc recess (11211) and an outer arc groove (11212). The outer arc recess (11211) is matched with the outer side of the middle semicircular plate (1122). The outer side of the middle semicircular plate (1122) is integrally formed with a middle arc-shaped protrusion (11221) that slides with the outer arc groove (11212). The inner side of the middle semicircular plate (1122) is provided with a middle arc notch (11222) and a middle arc groove (11223). The middle arc notch (11222) is matched with the outer side of the inner semicircular plate (1123). The outer side of the inner semicircular plate (1123) is integrally formed with an inner arc-shaped protrusion (11231) that slides with the middle arc groove (11223). The inner semicircular plate (1123) has an inner arc recess (11232) recessed towards the central arc recess (11222) at the middle of its inner side.

2. The glass screen printing quality testing tool according to claim 1, characterized in that: A rubber sheet (11233) is attached and fixed to the inner side of the inner semicircular plate (1123) near the inner arc recess (11232).

3. The glass screen printing quality testing tool according to claim 2, characterized in that: The sample frame (2) is provided with a first mounting cavity (21) and a second mounting cavity (22). The first mounting cavity (21) is located near the threaded rod (1111), and the second mounting cavity (22) is located near the corner of the sample frame (2). There are two second mounting cavities (22). The transmission assembly (13) includes a side transmission unit (131) and a middle transmission unit (132). Two side transmission units (131) are provided and symmetrically distributed on both sides of the sample frame (2). The side transmission unit (131) includes a driving bevel gear (1311), a driving rod (1312), a driven bevel gear (1313), and a main transmission bevel gear (1314). The driving bevel gear (1311) is fixed to one end of the threaded rod (1111) and located in the first mounting cavity (21). Inside, the active rod (1312) is rotatably mounted inside the sample frame (2), with both ends of the active rod (1312) extending into the first mounting cavity (21) and the second mounting cavity (22) respectively; the driven bevel gear (1313) is fixed to one end of the active rod (1312) and located in the first mounting cavity (21), and meshes with the active bevel gear (1311); the main drive bevel gear (1314) is fixed to the other end of the active rod (1312) and located in the second mounting cavity (22); The transmission unit (132) includes a driven rod (1321) and a driven bevel gear (1322). The driven rod (1321) rotates within the sample frame (2), with its two ends extending into two second mounting cavities (22). There are two driven bevel gears (1322), which are fixed to the two ends of the driven rod (1321) and mesh with the main drive bevel gears (1314) on both sides of the sample frame (2).

4. The glass screen printing quality testing tool according to claim 3, characterized in that: The drive assembly (12) includes a motor (121), a drive gear (122) and a driven gear (123). The motor (121) is fixed on the sample frame (2). The drive gear (122) is fixed to the output end of the motor (121). There are two driven gears (123) and they are respectively fixedly sleeved on two threaded rods (1111). One of the driven gears (123) meshes with the drive gear (122).

5. A glass screen printing quality testing tool according to claim 4, characterized in that: A first winding disc (3) located in the first mounting cavity (21) is fixedly sleeved on the threaded rod (1111), and a second winding disc (4) located in the first mounting cavity (21) and a transmission gear (10) located outside the sample frame (2) are fixedly sleeved on the limiting rod (1112). There are two transmission gears (10) and they are respectively fixedly sleeved on the two limiting rods (1112). The two transmission gears (10) mesh with two driven gears (123) respectively. Adsorption components (5) are provided at the four corners of the sample frame (2). Each adsorption component (5) includes a connecting cylinder (51), a suction cup (52), a piston body (53), and a first spring (54). 54) and traction rope (55); the connecting tube (51) is fixed to the bottom of the sample frame (2), and the side wall of the connecting tube (51) is provided with an exhaust pipe (511) near its lower end; the top of the suction cup (52) is connected to the lower end of the connecting tube (51), and the piston body (53) is set in the connecting tube (51) and slides with it; the first spring (54) is fixed between the bottom of the sample frame (2) and the top of the piston body (53), and the sample frame (2) is provided with a channel (23) for the installation of the traction rope (55), one end of the traction rope (55) is fixed to the top of the piston body (53), and the other end of the traction rope (55) is fixed to the first winding reel (3) or the second winding reel (4).

6. The glass screen printing quality testing tool according to claim 5, characterized in that: The sample frame (2) is fixed with mounting plates (6) on both sides adjacent to the threaded rod (1111). Each mounting plate (6) is provided with a side limiting assembly (7). The side limiting assembly (7) includes a fixing block (71), a guide rail (72), a sliding block (73), a second spring (74), a connecting plate (75), a connecting column (76), a mounting cylinder (77), a sleeve (78), a limiting plate (79), and a tension spring (80). The fixing block (71) and the guide rail (72) are both fixed to the top of the mounting plate (6). There are two guide rails (72) arranged symmetrically, and the length direction of the guide rail (72) is perpendicular to the axis of the threaded rod (1111). The sliding block (73) is slidably installed between the two guide rails (72), and the second spring (74) is fixed between the sliding block (73) and the fixing block (71). The two sides of the connecting plate (75) abut against the sides of the two guide rails (72) that are close to each other. (75) The side away from the sample frame (2) abuts against the sliding block (73); the mounting cylinder (77) is sleeved on the connecting column (76) and slides, its lower end abuts against the top of the guide rail (72), and the side wall of the sleeve (78) fits against the inner wall of the mounting cylinder (77); the diameter of the limiting plate (79) is larger than the outer diameter of the sleeve (78), its bottom surface is fixed to the upper end of the sleeve (78), and the two ends of the tension spring (80) are fixed to the bottom of the limiting plate (79) and the inner bottom wall of the mounting cylinder (77) respectively.

7. A glass screen printing quality testing tool according to claim 6, characterized in that: The mounting block (1113) has a mounting groove (8) on its top. A movable block (9) is provided in the mounting groove (8) and slides with it. A rotating shaft (91) is fixed on the outer semicircular plate (1121) and rotates and is rotatably connected to the movable block (9). A pressure sensor (81) is fixed on the inner wall of the mounting groove (8) away from the sample frame (2). The side of the pressure sensor (81) close to the sample frame (2) abuts against the movable block (9). A controller is provided on the sample frame (2) and is electrically connected to both the pressure sensor (81) and the motor (121).

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