A device for testing the scratch resistance of a decorative panel

Abstract

A scratch resistance testing device for decorative panels relates to the field of PET film-faced artificial board testing technology. It includes a test platform, a sliding mounting frame on the base, and a partitioned pressure testing component within its groove. This component includes a movable seat, a pressure testing frame, a support rod, a support plate, and a scratching head. It works in conjunction with a pressure-dividing return assembly to achieve segmented pressure scratching. A telescopic scraping component is installed in the bottom through-hole of the lower empty-stroke scraping component for chip removal, and a negative pressure impurity removal component is also provided. The scheme includes three pressure blocks that cooperate with the pressure testing frame, allowing the scratching head to automatically complete three segments of scratches with different pressures during continuous movement. Blank intervals are left between segments to avoid interference, enabling multiple tests per scratch and segmented comparison. Multiple elastic telescopic scraping heads remove debris, fibers, and dust adhering to the scratching head in the blank areas. Simultaneously, an elastic pull rope and piston drive a negative pressure cylinder to precisely extract residue from within the scratch, avoiding obscuring the true morphology. This ensures the efficiency, consistency, and accuracy of the scratch resistance testing of PET film-faced artificial boards.

Description

Technical Field

[0001] This invention relates to the field of PET film-faced engineered wood products testing technology, specifically a scratch resistance testing device for decorative panels. Background Technology

[0002] Decorative panels are engineered wood products made from specialized paper, natural minerals, or metals as base materials, processed through high-temperature, high-pressure coating, and veneer application. They offer a variety of surface textures and possess properties such as wear resistance, fire resistance, and weather resistance. Through lamination and hot pressing, they can achieve wood grain, stone, or metallic textures and are widely used in building walls, furniture manufacturing, and public spaces. Common types include wood decorative panels, metal decorative panels, plastic decorative panels, and exterior wall decorative panels. To ensure the long-lasting perfection of the decorative panel surface, its scratch resistance must undergo rigorous testing before leaving the factory.

[0003] Current scratch tests for decorative panels typically involve clamping and fixing the decorative panel specimen onto a test platform, then pressing a scratching tool with a specific geometry (such as a diamond needle or hardened steel needle) onto the surface of the decorative panel with a certain normal pressure. This normal pressure is usually applied through a weight lever or spring mechanism. Subsequently, the scratching tool or specimen is driven to perform relative linear or circular motion, forming one or more scratches on the surface of the decorative panel. Finally, visual or optical observation is used to determine whether the scratches penetrate the decorative layer, thereby evaluating its scratch resistance performance.

[0004] However, during the testing of PET film-faced engineered wood panels, the normal pressure applied by the scratching tool to the panel is preset and kept constant. When the initial scratching pressure is low, there are no obvious permanent marks on the surface of the PET film-faced engineered wood panel after the scratching needle leaves. When the initial scratching pressure is high, an indentation appears directly when pressure is applied. The scratching pressure is not reflected in the process of the sliding scratching head from adhesion to pressure application. If it is necessary to evaluate the scratch resistance of the same panel under different normal pressures, multiple independent tests must be conducted. Before each test, the position of the weights must be manually adjusted or the counterweights must be changed. This process is cumbersome and inefficient. Moreover, since the specimen position and scratch starting point of the panel are difficult to be completely consistent between different tests, the scratch results under different pressures lack direct comparability. It is difficult to accurately depict the complete damage evolution curve of the panel surface from elastic deformation to plastic scratches to coating peeling, which has certain limitations. Summary of the Invention

[0005] The purpose of this invention is to provide a scratch resistance testing device for decorative panels to solve the problems mentioned in the background art.

[0006] To address the above problems, the present invention provides the following technical solution: A scratch resistance testing device for decorative panels includes a test platform, on the top of which a panel to be tested is loaded, and a base is fixedly connected to one side of the top of the test platform. An installation frame is slidably connected to the outer wall of the base, and a groove is provided through the top of the installation frame. The inner wall of the chute is provided with a partitioned pressure testing component. The partitioned pressure testing component includes a movable seat that is slidably connected to the inner wall of the chute. The outer wall of the movable seat is provided with a pressure testing frame. Support rods are fixedly connected at equal intervals to the bottom of the movable seat. A support plate is slidably connected to the outer wall of the support rod. A scratch head is fixedly connected to the bottom center of the support plate. A pressure return component is provided at the top of the mounting frame so that during scratch testing, the scratch head forms segmented pressure scratches through the pressure return component. A scraping component is provided below the mounting frame. The scraping component includes a chassis that is fixedly connected to the bottom of the support rod. A through hole is provided in the center of the chassis, and a telescopic scraping component is provided inside the through hole so that when the scratch is segmented, the scraping head can be attached to the surface and remove the chips through the telescopic scraping component. A negative pressure waste removal component is also provided below the mounting frame.

[0007] Further: The voltage divider return assembly includes: A limiting groove is opened inside the pressure measuring frame. The inner wall of the limiting groove is slidably connected to the outer wall of the movable seat. A spring is fixedly connected to the top of the movable seat. The top of the spring is fixedly connected to the inner wall of the limiting groove. An adjusting frame is fixedly connected to the top of the mounting frame. The pressure measuring frame and the movable seat form a telescopic structure through the spring. The top of the pressure measuring frame is slidably connected to the top inner wall of the adjusting frame by the spring.

[0008] Furthermore: a support frame is fixedly connected to the top of the adjustment frame at equal intervals, an adjustment groove is opened through the top of the adjustment frame, an adjustment screw is threadedly connected to the top of the support frame, a pressure block is rotatably connected to the bottom of the adjustment screw, the outer walls on both sides of the pressure block are in contact with and slidably connected to the inner wall of the adjustment groove, and one side of the adjustment groove is inclined.

[0009] Further: A second spring is sleeved on the outer wall of the support rod, the top of the second spring is fixedly connected to the bottom of the pressure measuring frame, and the bottom of the second spring is fixedly connected to the top of the support plate.

[0010] Further: One end of the mounting frame is threaded with a locking screw, a drive motor is fixedly installed on the inner wall of the slide, one end of the drive motor's output shaft is fixedly connected to a drive screw, and the other end of the drive screw is rotatably connected to the inner wall of the slide. The outer wall of the drive screw is threadedly connected to the inner wall of the movable seat, and through slots are provided on both sides of the pressure measuring frame corresponding to the drive screw.

[0011] Further: The telescopic scraping assembly includes: The inner wall of the through hole has grooves that are evenly spaced apart. A spring is fixedly connected to the inner wall of the groove, and a scraping head is fixedly connected to the other end of the spring. The outer wall of the scraping head is in contact with and slidably connected to the inner wall of the groove. The ends of the four scraping heads that are close to each other are pressed and set at the bottom tip of the scraping head by the spring.

[0012] Further: The negative pressure exhaust component includes a mounting block fixedly connected to the outer wall of one side of the chassis, and a negative pressure cylinder is fixedly connected to the inner wall of the mounting block. The bottom of the negative pressure cylinder is flush with the bottom of the chassis. A cavity is opened in the inner wall of the negative pressure cylinder. A piston is slidably connected to the inner wall of the cavity, and an air intake hole is opened through the bottom of the negative pressure cylinder.

[0013] Furthermore, an elastic pull rope is fixedly connected to the top of the piston, and the other end of the elastic pull rope passes through the top of the negative pressure cylinder and is fixedly connected to the bottom of one end of the mounting frame.

[0014] The effects of the above solution are as follows: 1. In the scratch resistance test of decorative panels, this invention uses three pressure blocks with preset and adjustable pressure, and a linearly movable pressure measuring frame. As the pressure measuring frame moves along a linear trajectory, it can sequentially contact the three pressure blocks. Thus, during the application of different specific pressures by the driving scratch head, the entire process of contact, full pressure application, and then detachment can be achieved through the inclined plane. At the same time, blank intervals are left in the three-segment scratch test, avoiding interference from the observation and judgment of multiple overlapping scratches. This enables multiple tests with one scratch and segmented comparison, significantly improving the testing efficiency and comparability of results for PET film-faced artificial panels.

[0015] 2. When conducting scratch resistance tests on decorative panels, this invention allows multiple elastically telescopic scraping heads to mechanically scrape the tips and sidewalls of the scraping heads during the stroke with blank intervals. This removes coating debris, fibers, or dust particles that may have adhered to the scraping heads from the previous pressure scratch test. This prevents these adhered materials from altering the actual contact geometry between the scraping head and the decorative panel during the next scratch test, which could lead to distorted pressure distribution, inaccurate test results, or even false scratches. This ensures the consistency of the scraping head state in continuous scratch tests of PET film-faced artificial panels.

[0016] 3. When conducting scratch resistance tests on decorative panels, this invention can, during the movement of the scratch head, utilize the cooperation of an elastic rope and a piston to use a negative pressure cylinder located behind the sliding path of the scratch head to precisely suction the newly formed scratch groove. This removes loose coating fragments, grinding dust, fiber burrs, and other residues generated during the scratching process, preventing these residues from remaining in the scratch groove and obscuring the true bottom morphology of the scratch during subsequent observation, thus avoiding misjudgment and ensuring the accuracy of subsequent scratch test evaluation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a side view of the overall structure of the present invention; Figure 3 This is a partial structural diagram of the present invention; Figure 4 This is a schematic diagram illustrating the kinematic relationship between the pressure measuring frame and the pressure applying block of the present invention. Figure 5 This is a schematic diagram showing the connection relationship between the cutting head and the movable seat of the present invention; Figure 6 This is a structural schematic diagram showing the positional relationship between the scraping head and the scrubbing head of the present invention; Figure 7 This is a structural schematic diagram showing the connection position between the negative pressure cylinder and the chassis of the present invention.

[0018] In the diagram: 1. Test bench; 2. Test plate; 3. Base; 4. Mounting frame; 5. Slide groove; 9. Locking screw; 10. Drive motor; 11. Drive screw; 6. Zoned pressure testing component; 601. Moving seat; 602. Pressure testing frame; 603. Limiting groove; 604. Through groove; 605. Spring 1; 606. Adjusting frame; 607. Support frame; 608. Adjusting groove; 609. Adjusting screw; 6 10. Pressure block; 611. Support rod; 612. Support plate; 613. Scraper head; 614. Spring 2; 7. Idle scraping component; 701. Chassis; 702. Through hole; 703. Groove; 704. Spring 3; 705. Scraper head; 8. Negative pressure waste removal component; 801. Mounting block; 802. Negative pressure cylinder; 803. Cavity; 804. Suction hole; 805. Piston; 806. Elastic pull rope. Detailed Implementation

[0019] The technical solutions in the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings.

[0020] Example 1, please refer to Figures 1-7A scratch resistance testing device for decorative panels includes a test platform 1, on the top of the test platform 1 is a board 2 to be tested, and a base 3 is fixedly connected to one side of the top of the test platform 1. An installation frame 4 is slidably connected to the outer wall of the base 3, and a groove 5 is opened through the top of the installation frame 4.

[0021] One end of the mounting frame 4 is threaded with a locking screw 9. The inner wall of the slide 5 is fixedly mounted with a drive motor 10. One end of the output shaft of the drive motor 10 is fixedly connected with a drive screw 11, and the other end of the drive screw 11 is rotatably connected to the inner wall of the slide 5. The outer wall of the drive screw 11 is threadedly connected to the inner wall of the moving seat 601. The two sides of the pressure measuring frame 602 are provided with through slots 604 corresponding to the drive screw 11.

[0022] Furthermore, the inner wall of the slide 5 is provided with a partitioned pressure testing component 6. The partitioned pressure testing component 6 includes a movable seat 601 that is slidably connected to the inner wall of the slide 5. The outer wall of the movable seat 601 is provided with a pressure testing frame 602. The bottom of the movable seat 601 is fixedly connected with support rods 611 at equal intervals. The outer wall of the support rods 611 is slidably connected with a support plate 612. The bottom center of the support plate 612 is fixedly connected with a scratch head 613. The top of the mounting frame 4 is provided with a pressure dividing return component so that during the scratch test, the scratch head 613 forms segmented pressure scratches through the pressure dividing return component.

[0023] Specifically, when using this testing device, the test plate 2 is first fixedly installed on the test bench 1 according to the national standard hole opening. Then, according to the thickness of the test plate 2, the height of the mounting frame 4 on the base 3 is adjusted, and the position is locked by rotating the locking screw 9, so that the tip of the scratch head 613 located below the pressure testing frame 602 is placed in contact with the scratch detection surface of the test plate 2. Next, the drive screw 11 is fixedly connected to one end of the output shaft of the drive motor 10, and the other end of the drive screw 11 is rotatably connected to the inner wall of the slide groove 5. The outer wall of the drive screw 11 is threadedly connected to the inner wall of the moving seat 601. The two sides of the pressure testing frame 602 are provided with through slots 604 corresponding to the drive screw 11, so that the drive motor 10 can be started to drive the moving seat 601 to move, thereby driving the scratch head 613 to slide from one side of the detection surface of the test plate 2 to the other side.

[0024] Furthermore, during the sliding test, a pressure-dividing return component is installed on the top of the mounting frame 4. During the scratch test, the scratch head 613 forms segmented pressure scratches through the pressure-dividing return component. This allows the scratch head 613 to apply different specific scratch pressures to the same test board 2. The scratch head 613 can achieve a complete process of contact, gradual and complete pressure application, and then separation through the inclined surface of the pressure block 610. At the same time, a blank interval is left between the three scratch tests, avoiding interference from the observation and judgment of multiple overlapping scratches. This enables multiple tests with one scratch and segmented comparison, significantly improving the testing efficiency and comparability of results for PET film-faced artificial boards.

[0025] Furthermore, the voltage divider return component includes: The pressure measuring frame 602 has a limiting groove 603 inside. The inner wall of the limiting groove 603 is slidably connected to the outer wall of the movable seat 601. A spring 605 is fixedly connected to the top of the movable seat 601. The top of the spring 605 is fixedly connected to the inner wall of the limiting groove 603. An adjusting frame 606 is fixedly connected to the top of the mounting frame 4. The pressure measuring frame 602 and the movable seat 601 form a telescopic structure through the spring 605. The top of the pressure measuring frame 602 is slidably connected to the top inner wall of the adjusting frame 606 by the spring 605.

[0026] Specifically, under normal circumstances, the pressure measuring frame 602 is pressed by the elastic force of the spring 605, so that its top is pressed against the top inner wall of the adjusting frame 606, and can slide horizontally while the moving seat 601 moves.

[0027] Furthermore, a support frame 607 is fixedly connected at equal intervals to the top of the adjusting frame 606. An adjusting groove 608 is opened through the top of the adjusting frame 606. An adjusting screw 609 is threadedly connected to the top of the support frame 607. A pressure block 610 is rotatably connected to the bottom of the adjusting screw 609. The outer walls on both sides of the pressure block 610 are in contact with and slidably connected to the inner wall of the adjusting groove 608. One side of the adjusting groove 608 is inclined.

[0028] A second spring 614 is fitted on the outer wall of the support rod 611. The top of the second spring 614 is fixedly connected to the bottom of the pressure measuring frame 602, and the bottom of the second spring 614 is fixedly connected to the top of the support plate 612.

[0029] Specifically, during the horizontal movement of the pressure testing frame 602, the tip of the scribe head 613 simultaneously slides horizontally against the surface of the plate 2 to be tested, forming initial contact. A support frame 607 is fixedly connected at equal intervals to the top of the adjusting frame 606. An adjusting groove 608 is formed through the top of the adjusting frame 606. An adjusting screw 609 is threaded into the top of the support frame 607. A pressure block 610 is rotatably connected to the bottom of the adjusting screw 609. The outer walls of both sides of the pressure block 610 slide against the inner wall of the adjusting groove 608. One side of the adjusting groove 608 is inclined, allowing the downward movement of the pressure block 610 to be controlled by rotating the adjusting screw 609, thus changing the downward pressure position on the pressure testing frame 602. A second spring 614 is sleeved on the outer wall of the support rod 611. The top of the second spring 614 is fixedly connected to the bottom of the pressure testing frame 602. The bottom of the pressure testing frame 602 is fixedly connected to the top of the support plate 612, so that when the pressure testing frame 602 moves down, it can squeeze the second spring 614. Then, the elastic force of the second spring 614 drives the scratch head 613 to move down and apply pressure. At this time, the pressure is gradually applied. When the top of the pressure testing frame 602 completely slides over the inclined surface of the pressure block 610 to its bottom position, the pressure is fully applied. When the top of the pressure testing frame 602 completely slides over the bottom of the pressure block 610, it rises back to its original position under the action of the first spring 605. At this time, it returns to the horizontal sliding position with the surface of the plate to be tested 2, thus realizing the complete pressure application process. At the same time, the different scratch pressure tests in one sliding test process are realized by using multiple pressure blocks 610 at different downward positions. And before the pressure testing frame 602 enters the rising back position and contacts the next pressure block 610, the horizontal sliding at this time can clearly show the interval position between different scratch pressures.

[0030] In the second embodiment, based on the above embodiment, a scraping component 7 is provided below the mounting frame 4. The scraping component 7 includes a chassis 701 that is fixedly connected to the bottom of the support rod 611. A through hole 702 is provided through the center of the chassis 701, and a telescopic scraping component is provided inside the through hole 702 so that when the scratch is segmented, the scraping head 613 can be attached to the scraping component to remove the chips.

[0031] Furthermore, the telescopic scraping assembly includes: The inner wall of the through hole 702 has grooves 703 that are evenly spaced. A spring 704 is fixedly connected to the inner wall of the groove 703, and a scraping head 705 is fixedly connected to the other end of the spring 704. The outer wall of the scraping head 705 is in contact with the inner wall of the groove 703 and is slidably connected. The ends of the four scraping heads 705 that are close to each other are pressed and set at the bottom tip of the scraping head 613 by the spring 704.

[0032] Specifically, under normal circumstances, the base 701, which is fixedly connected to the bottom of the support rod 611, has a through hole 702 through its center. The bottom of the base 701 is flush with the tip of the scrubbing head 613. Therefore, when the scrubbing head 613 slides horizontally on the surface of the test plate 2, the base 701 will slide synchronously on the surface of the test plate 2. Then, grooves 703 are evenly spaced on the inner wall of the through hole 702. A spring 704 is fixedly connected to the inner wall of the groove 703, and a scraping head 705 is fixedly connected to the other end of the spring 704. The outer wall of the scraping head 705 slides in contact with the inner wall of the groove 703. The four scraping heads 705 are pressed against the bottom tip of the scrubbing head 613 by the spring 704. Thus, under normal circumstances, the four scraping heads 705 are pressed against the scrubbing head 613 by the spring 704. At the tip position, when the pressure block 610 applies pressure, the scratching head 613 will move downwards individually, causing the four scratching heads 705 to move from the tip position of the scratching head 613 to the vertical outer wall position of the scratching head 613. When a complete scratch test is completed, the scratching head 613 will return to its initial position under the action of the spring 605, allowing multiple elastically telescopic scratching heads 705 to mechanically scratch the tip and side wall of the scratching head 613 after the previous scratch test. This removes coating debris, fibers, or dust particles that may have adhered to the scratching head 613 during the previous pressure scratch test, preventing these adhered substances from altering the actual contact geometry between the scratching head 613 and the decorative panel during the next scratch test, which could lead to distorted pressure distribution, inaccurate test results, or even false scratches. This ensures the consistency of the scratching head 613's state during continuous scratch tests of the PET film-faced artificial board.

[0033] In Example 3, based on the above examples, a negative pressure cleaning component 8 is also provided below the mounting frame 4.

[0034] Furthermore, the negative pressure exhaust component 8 includes a mounting block 801 fixedly connected to the outer wall of one side of the chassis 701, and a negative pressure cylinder 802 fixedly connected to the inner wall of the mounting block 801. The bottom of the negative pressure cylinder 802 is flush with the bottom of the chassis 701. A cavity 803 is opened in the inner wall of the negative pressure cylinder 802. A piston 805 is slidably connected to the inner wall of the cavity 803. An air intake hole 804 is opened through the bottom of the negative pressure cylinder 802.

[0035] The top of the piston 805 is fixedly connected to an elastic pull rope 806, and the other end of the elastic pull rope 806 passes through the top of the negative pressure cylinder 802 and is fixedly connected to the bottom of one end of the mounting frame 4.

[0036] Specifically, during the scratch resistance test of the decorative panel, a negative pressure cylinder 802 is fixedly connected to the inner wall of the mounting block 801 during the movement of the scratch head 613. The bottom of the negative pressure cylinder 802 is flush with the bottom of the base 701. A cavity 803 is formed in the inner wall of the negative pressure cylinder 802, and a piston 805 is slidably connected to the inner wall of the cavity 803. An air suction hole 804 is formed through the bottom of the negative pressure cylinder 802. Under normal circumstances, the air suction hole 804 at the bottom of the negative pressure cylinder 802 is blocked and covered by the surface of the panel 2 to be tested. Then, an elastic pull rope 806 is fixedly connected to the top of the piston 805, and the other end of the elastic pull rope 806 passes through the top of the negative pressure cylinder 802 and is fixedly connected to the mounting frame. At one end of the bottom of the 4, during the movement of the scratch head 613, the elastic rope 806 will be stretched, thereby driving the piston 805 to rise. Since the bottom suction hole 804 of the negative pressure cylinder 802 is blocked and covered by the surface of the test plate 2, the inside of the negative pressure cylinder 802 is in a negative pressure state. When the scratch head 613 scratches a mark during the sliding process, the suction hole 804 at the bottom of the negative pressure cylinder 802 will be connected to the scratch. The negative pressure will be used to specifically suck away the loose coating fragments, grinding dust, fiber burrs and other residues generated during the scratching process, so as to avoid these residues remaining in the scratch groove and obscuring the true bottom shape of the scratch during subsequent observation, which would lead to misjudgment and ensure the accuracy of subsequent scratch test evaluation.

[0037] It should be noted that all the devices in this application are common devices on the market, and can be selected according to the needs of specific use. The circuit connection relationship of each device is a simple series and parallel connection circuit. There is no innovation in the circuit connection part. Those skilled in the art can easily implement it. It belongs to the prior art and will not be described in detail.

[0038] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A scratch resistance testing device for decorative panels, comprising a testing table (1), characterized in that: The test bench (1) is loaded with a plate to be tested (2) on its top, and a base (3) is fixedly connected to one side of the top of the test bench (1). An installation frame (4) is slidably connected to the outer wall of the base (3), and a sliding groove (5) is opened through the top of the installation frame (4). The inner wall of the slide (5) is provided with a partition pressure measuring component (6). The partition pressure measuring component (6) includes a movable seat (601) that is slidably connected to the inner wall of the slide (5). The outer wall of the movable seat (601) is provided with a pressure measuring frame (602). The bottom of the movable seat (601) is fixedly connected with support rods (611) at equal distances. The outer wall of the support rods (611) is fitted with a support plate (612) that is slidably connected. The bottom center of the support plate (612) is fixedly connected with a scratch head (613). The top of the mounting frame (4) is provided with a pressure return component so that during the scratch test, the scratch head (613) forms a segmented pressure scratch through the pressure return component. The mounting frame (4) is provided with a free-stroke scraping component (7) below it. The free-stroke scraping component (7) includes a chassis (701) fixedly connected to the bottom of the support rod (611). A through hole (702) is provided through the center of the chassis (701), and a telescopic scraping component is provided inside the through hole (702) so that when the scratch is segmented, the scraping head (613) can be attached to remove the chips through the telescopic scraping component. A negative pressure venting component (8) is also provided below the mounting frame (4).

2. The scratch resistance testing device for decorative panels according to claim 1, characterized in that: The voltage divider return component includes: A limiting groove (603) is opened inside the pressure measuring frame (602). The inner wall of the limiting groove (603) is slidably connected to the outer wall of the movable seat (601). A spring (605) is fixedly connected to the top of the movable seat (601). The top of the spring (605) is fixedly connected to the inner wall of the limiting groove (603). An adjusting frame (606) is fixedly connected to the top of the mounting frame (4). The pressure measuring frame (602) and the movable seat (601) form a telescopic structure through the spring (605). The top of the pressure measuring frame (602) is slidably connected to the top inner wall of the adjusting frame (606) by the spring (605).

3. The scratch resistance testing device for decorative panels according to claim 2, characterized in that: The top of the adjustment frame (606) is fixedly connected to a support frame (607) at equal intervals. The top of the adjustment frame (606) is provided with an adjustment groove (608). The top of the support frame (607) is internally threaded with an adjustment screw (609). The bottom of the adjustment screw (609) is rotatably connected to a pressure block (610). The outer walls on both sides of the pressure block (610) are in contact with and slidably connected to the inner wall of the adjustment groove (608). One side of the adjustment groove (608) is inclined.

4. The scratch resistance testing device for decorative panels according to claim 1, characterized in that: The outer wall of the support rod (611) is fitted with a second spring (614), the top of the second spring (614) is fixedly connected to the bottom of the pressure measuring frame (602), and the bottom of the second spring (614) is fixedly connected to the top of the support plate (612).

5. The scratch resistance testing device for decorative panels according to claim 1, characterized in that: One end of the mounting frame (4) is threaded with a locking screw (9), and a drive motor (10) is fixedly installed on the inner wall of the slide (5). One end of the drive motor (10) is fixedly connected with a drive screw (11), and the other end of the drive screw (11) is rotatably connected to the inner wall of the slide (5). The outer wall of the drive screw (11) is threadedly connected to the inner wall of the moving seat (601). The two sides of the pressure measuring frame (602) are provided with through slots (604) corresponding to the drive screw (11).

6. The scratch resistance testing device for decorative panels according to claim 1, characterized in that: The telescopic scraping assembly includes: The inner wall of the through hole (702) has grooves (703) that are evenly spaced. A spring (704) is fixedly connected to the inner wall of the groove (703), and a scraper head (705) is fixedly connected to the other end of the spring (704). The outer wall of the scraper head (705) is in contact with the inner wall of the groove (703) and slides. The ends of the four scraper heads (705) that are close to each other are pressed and set at the bottom tip of the scraper head (613) by the spring (704).

7. The scratch resistance testing device for decorative panels according to claim 1, characterized in that: The negative pressure exhaust component (8) includes a mounting block (801) fixedly connected to the outer wall of one side of the chassis (701), and a negative pressure cylinder (802) is fixedly connected to the inner wall of the mounting block (801). The bottom of the negative pressure cylinder (802) is flush with the bottom of the chassis (701). A cavity (803) is opened in the inner wall of the negative pressure cylinder (802). A piston (805) is slidably connected to the inner wall of the cavity (803), and an air intake hole (804) is opened through the bottom of the negative pressure cylinder (802).

8. The scratch resistance testing device for decorative panels according to claim 7, characterized in that: The top of the piston (805) is fixedly connected to an elastic pull rope (806), and the other end of the elastic pull rope (806) passes through the top of the negative pressure cylinder (802) and is fixedly connected to the bottom of one end of the mounting frame (4).

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