Coating grating device

Abstract

The utility model discloses a kind of coating grating devices, belong to coating grating test field, a kind of coating grating device, including base, sleeve, telescopic rod, spring, tool rest and blade, sleeve is vertically installed in base, telescopic rod is slidably connected in sleeve, the bottom end of telescopic rod is out of sleeve, and detachably connected with tool rest, the bottom end of spring is connected with the top end of telescopic rod, the top end of spring is connected with base, spring is in pre-compression state, blade is detachably connected in tool rest, and the bottom end of blade is below the bottom surface of base, the bottom surface of base is horizontal plane, blade is perpendicular to the bottom surface of base. The utility model is simple in structure, extremely low in cost, portable and easy to operate, and the utility model is pre-compressed spring to realize constant pressure grating, sleeve and telescopic rod cooperate to ensure that blade moves vertically, and also can be replaced flexibly by detachable tool rest and blade, can significantly improve the drawbacks of manual test, greatly improve the accuracy, repeatability and applicability of test result.

Description

Technical Field

[0001] This utility model belongs to the field of coating cross-cut test, and in particular relates to a coating cross-cut tester. Background Technology

[0002] The cross-cut adhesion test (such as GB / T 9286, ISO 2409 standards) is one of the most commonly used methods for testing coating adhesion. Currently, commonly used tools include:

[0003] 1. Manual marking knife: Consists of a blade and a handle. For testing, the following is required:

[0004] Manually ensure the scratching tool is perpendicular to the coating surface (angular deviation affects scratch depth and result).

[0005] Apply uniform and appropriate pressure manually (too little pressure will not penetrate the coating, while too much pressure may damage the substrate).

[0006] Manually ensure even grid spacing (usually relying on user experience or an auxiliary ruler).

[0007] 2. Electric / automatic cross-cut tester: It can guarantee verticality, pressure and spacing, but it is expensive, bulky and inconvenient to carry, and is not suitable for on-site or quick and simple testing.

[0008] It is evident that existing manual cross-cutting tools rely on experience, making it difficult to precisely control perpendicularity, pressure, and spacing, resulting in poor repeatability and low comparability of test results. Meanwhile, professional automated equipment is too expensive and heavy, unsuitable for widespread use or field applications. Therefore, there is an urgent need for a portable, simple, easy-to-operate coating cross-cutting tool with high accuracy and repeatability. Utility Model Content

[0009] The purpose of this invention is to provide a coating grid applicator to overcome at least one of the above-mentioned defects in the prior art.

[0010] To achieve this objective, the present invention adopts the following technical solution:

[0011] This utility model provides a coating scribing tool, including a base, a sleeve, a telescopic rod, a spring, a blade holder, and a blade. The sleeve is vertically installed on the base, and the telescopic rod is slidably connected inside the sleeve. The bottom end of the telescopic rod extends out of the sleeve and is detachably connected to the blade holder. The bottom end of the spring is connected to the top end of the telescopic rod, and the top end of the spring is connected to the base. The spring is in a pre-compressed state. The blade is detachably connected to the blade holder, and the bottom end of the blade is located below the bottom surface of the base. The bottom surface of the base is a horizontal plane, and the blade is perpendicular to the bottom surface of the base.

[0012] Preferably, the base includes a U-shaped base plate, a concave frame, and a U-shaped bottom plate. The top of the U-shaped base plate is fixed with the concave frame, and the bottom of the U-shaped base plate is detachably connected to the bottom of the U-shaped base plate. The bottom surface of the U-shaped bottom plate is a horizontal plane.

[0013] Preferably, a first locking block is fixed at each of the four corners of the bottom of the U-shaped base plate, and a first locking groove is provided at each of the four corners of the top of the U-shaped base plate to engage with the first locking block.

[0014] Preferably, the bottom surface of the U-shaped base plate has a PTFE layer.

[0015] Preferably, a stud is fixed in the middle of the concave frame, the sleeve is screwed to the stud, and the top end of the spring is connected to the bottom end of the stud.

[0016] Preferably, the telescopic rod includes a first sliding part, a telescopic part, and a guide limiting part. The top end of the telescopic part is fixed with the first sliding part, the first sliding part is slidably connected to the sleeve, the bottom end of the spring is connected to the top wall of the first sliding part, the side wall of the telescopic part has a guide limiting part, and the bottom wall of the sleeve has a through hole for the telescopic part to pass through and a guide limiting hole for the guide limiting part to pass through, the guide limiting hole and the through hole are connected.

[0017] Preferably, the telescopic rod further includes a second sliding part and a second locking block. The bottom end of the telescopic part is fixed with the second sliding part, and the left side wall of the second sliding part is fixed with the second locking block. The top of the tool holder has a slide rail, the second sliding part slides in cooperation with the slide rail, the right end of the slide rail penetrates the right side wall of the tool holder, and the left side wall of the slide rail has a second locking groove, which engages with the second locking block.

[0018] Preferably, the tool holder also has a channel located below the slide. The right end of the channel penetrates the right side wall of the tool holder, and the left side wall of the channel has a third slot. A third locking block is fixed to the left side wall of the blade. The third slot and the third locking block engage with each other, and the bottom end of the blade protrudes from the channel.

[0019] Preferably, the bottom end of the blade has several cutting teeth arranged along the length direction of the blade, and the distance between adjacent cutting teeth is 1-3mm.

[0020] Preferably, an extension plate is fixed to the inner wall of the base, the extension plate has scale lines, and the bottom surface of the extension plate is located above the bottom surface of the base.

[0021] The beneficial effects of this utility model are as follows:

[0022] 1. It has a simple structure, extremely low cost, is portable and lightweight, and is easy to operate. No training is required to master it. It achieves constant pressure grading through a pre-compression spring, and the sleeve and telescopic rod work together to ensure the vertical movement of the blade. It can also be flexibly replaced with a detachable blade holder and blade. It can significantly improve the drawbacks of manual testing and greatly improve the accuracy, repeatability and applicability of test results.

[0023] 2. The bottom surface of the U-shaped base plate is horizontal, which ensures that the base and the sample coating are in horizontal contact, and ensures that the grid depth and spacing are consistent to improve the accuracy of the test.

[0024] 3. The removable U-shaped base plate design not only facilitates cleaning and maintenance to maintain good contact with the coating and avoid scratching the coating, but also allows for replacement of the base plate only when the bottom surface is uneven, greatly reducing maintenance costs and minimizing resource waste.

[0025] 4. The first card block and the first card slot are engaged at the four corners to achieve a detachable connection between the U-shaped base plate and the U-shaped base plate, which not only makes disassembly and assembly convenient, but also ensures a stable connection between the two.

[0026] 5. The PTFE layer maintains smooth contact with the coating surface, effectively preventing scratches or wear damage to the coating surface caused by the roughness of the base surface.

[0027] 6. The guide limiting part and the guide limiting hole cooperate to provide precise guidance for the installation of the telescopic part to avoid offset and jamming, improve assembly efficiency and stability, and strictly constrain the circumferential rotation and radial offset of the telescopic part. Combined with the sliding cooperation between the first sliding part and the sleeve, it ensures that the telescopic rod and the blade move only in the up and down direction, avoids skewing of the grid and uneven depth, and significantly improves the test accuracy.

[0028] 7. The blade holder and telescopic rod are detachably connected by the second locking block and the second locking slot. The blade and the blade holder are detachably connected by the third locking block and the third locking slot. Both can be easily disassembled by simply pushing and pulling left and right, without the need for additional tools.

[0029] 8. The extension plate combined with the scale line makes it easy to ensure uniform grid spacing and allows for intuitive observation of grid spacing without relying on user experience or auxiliary rulers. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of this utility model.

[0031] Figure 2 This is a schematic diagram of the main structure of Embodiment 1 of this utility model.

[0032] Figure 3 This is a bottom view structural diagram of Embodiment 1 of this utility model (excluding the U-shaped base plate and PTFE layer).

[0033] Figure 4 This is a top view of the circular base plate according to Embodiment 1 of this utility model.

[0034] Figure 5 This is a bottom view structural diagram of the circular base plate according to Embodiment 1 of this utility model.

[0035] Figure 6 This is a three-dimensional structural diagram of the telescopic rod according to Embodiment 1 of this utility model.

[0036] Figure 7 This is a top view of a sleeve according to an embodiment of the present invention.

[0037] Figure 8 This is a top view of the structure of Embodiment 1 of this utility model.

[0038] Figure 9 yes Figure 8 Schematic diagram of the cross-sectional structure along the AA direction.

[0039] Figure 10 yes Figure 9 A magnified structural diagram of B in the diagram.

[0040] Figure 11 This is a top view of the structure of Embodiment 2 of this utility model.

[0041] The labels in the attached diagram are as follows: 1-Spring, 2-Telescopic rod, 3-Sleeve, 4-Base, 5-Knife holder, 41-U-shaped base plate, 42-Concave frame, 43-U-shaped base plate, 44-First locking block, 45-First locking groove, 46-PTFE layer, 47-Stud, 21-First sliding part, 22-Telescopic part, 23-Guide limiting part, 31-Through hole, 32-Guide limiting hole, 24-Second sliding part, 25-Second locking block, 51-Slide, 52-Second locking groove, 53-Insertion channel, 54-Third locking groove, 55-Third locking block, 6-Blade, 61-Knife tooth, 7-Extension plate, 8-Scale line. Detailed Implementation

[0042] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0043] Contents not described in detail in this specification are existing technologies known to those skilled in the art. In the description of this utility model, it should be understood that terms such as "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this utility model. Furthermore, terms such as "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Example 1:

[0045] like Figures 1 to 10 As shown, this embodiment provides a coating scribing tool, including a base 4, a sleeve 3, a telescopic rod 2, a spring 1, a blade holder 5, and a blade 6. The sleeve 3 is vertically installed on the base 4. The telescopic rod 2 is slidably connected inside the sleeve 3. The bottom end of the telescopic rod 2 extends out of the sleeve 3 and is detachably connected to the blade holder 5. The bottom end of the spring 1 is connected to the top end of the telescopic rod 2, and the top end of the spring 1 is connected to the base 4. The spring 1 is in a pre-compressed state. The blade 6 is detachably connected to the blade holder 5, and the bottom end of the blade 6 is located below the bottom surface of the base 4. The bottom surface of the base 4 is a horizontal plane, and the blade 6 is perpendicular to the bottom surface of the base 4. Use according to the following steps:

[0046] 1. Positioning: Place the base 4 above the area of ​​the sample to be tested, and align the blade 6 with the desired position.

[0047] 2. Applying downward force: The user presses the base 4 downward with his hand. At this time, the entire base 4 (including the sleeve 3) tends to move downward, but the telescopic rod 2 (including the blade 6) will slide upward relative to the sleeve 3 under the reaction force of the sample, and the spring 1 will be further compressed.

[0048] 3. Achieving Constant Pressure Cutting: When spring 1 is compressed to its preset working length (determined by its pre-compression and stiffness), the downward force exerted by spring 1 on telescopic rod 2 (i.e., the pressure acting on blade 6) reaches a constant value F. At this point, no matter how much pressure the user applies (as long as the base 4 does not lift), the pressure exerted by blade 6 on the coating remains constant at F. The precise fit between the vertically positioned sleeve 3 and telescopic rod 2 ensures that blade 6 remains perpendicular to the sample surface and the bottom surface of base 4 throughout the entire pressing process.

[0049] 4. Scribing: Keep the pressure down (at this time the pressure is constant and the blade 6 is vertical), and the user can drag the entire coating scribing tool horizontally to scribe a uniform and vertical scribe line on the coating.

[0050] 5. Change position: Lift the coating scribing tool and move it (or move the sample) by a standard interval (e.g., 1mm or 2mm). Repeat the above steps to draw the next parallel scribing line. Rotate the sample 90° and repeat the operation to draw the intersecting grid.

[0051] The coating peeling situation will be evaluated according to standard methods.

[0052] This utility model's coating cross-cutting device has a simple structure, with no motor, no circuit, and no complex transmission. Its manufacturing cost is extremely low, and it is easy to process and assemble. Compared to professional automatic cross-cutting instruments that cost tens of thousands of yuan, this coating cross-cutting device costs only tens to hundreds of yuan, yet it significantly improves upon the shortcomings of manual testing. It is also portable and lightweight: its small size and light weight make it ideal for on-site testing, for quality inspectors to carry, or for quick spot checks in the laboratory. It requires only two simple actions: pressing and dragging, similar to operating a regular manual knife, but with significantly improved results, and can be mastered without training. It achieves constant pressure cross-cutting. Through the ingenious design of the pre-compressed spring 1, the pressure of the blade 6 is automatically stabilized at the preset value F at the moment of operation, eliminating the drawbacks of uneven manual force application and ensuring consistent cutting depth each time. Furthermore, through the cooperation of the sleeve 3 and the telescopic rod 2, the blade 6 can only move vertically up and down, solving the problem of angle tilt during manual cross-cutting and improving the accuracy and repeatability of test results. The detachable tool holder 5 and blade 6 can be replaced according to usage requirements, making it widely applicable. The detachable tool holder 5 also makes it easier to install and remove the blade 6.

[0053] The base 4 includes a U-shaped base plate 41, a concave frame 42, and a U-shaped base plate 43. The concave frame 42 is fixed to the top of the U-shaped base plate 41, and the U-shaped base plate 43 is detachably connected to the bottom of the U-shaped base plate 41. The bottom surface of the U-shaped base plate 43 is horizontal. The combination of the U-shaped base plate 41 and the concave frame 42 provides a stable support structure for the coating cross-cutting device, ensuring that the base 4 remains stable during the cross-cutting operation and preventing the accuracy of the cross-cutting from being affected by the shaking of the base 4. The horizontal bottom surface of the U-shaped base plate 43 ensures that the base 4 and the coating on the sample surface are horizontally adhered. This horizontal adherence allows the blade 6 to act evenly on the coating surface during the cross-cutting process, ensuring consistent depth and spacing of the cross-cutting, thereby guaranteeing the accuracy of the test results. The U-shaped base plate 43 adopts a detachable connection method. When the bottom surface of the U-shaped base plate 43 becomes uneven due to prolonged use or impact, it is not necessary to replace the entire base 4; only the U-shaped base plate 43 needs to be disassembled and replaced. This design greatly reduces maintenance costs and avoids the waste of resources caused by replacing the entire base 4. Furthermore, the detachable U-shaped base plate 43 facilitates daily cleaning and maintenance, allowing for timely removal of stains and wear particles, maintaining the smoothness of the bottom surface of the U-shaped base plate 43, further ensuring good contact with the coating surface, and preventing scratches on the coating.

[0054] The base plate 41 has four fixed first locking blocks 44 at its bottom corners, and the base plate 43 has four locking slots 45 at its top corners that engage with the first locking blocks 44. The engagement of the first locking blocks 44 and the first locking slots 45 enables the detachable connection between the base plate 43 and the base plate 41, facilitating easy assembly and disassembly. Furthermore, the engagement at the four corners ensures a stable connection between the base plate 43 and the base plate 41.

[0055] The bottom surface of the U-shaped base plate 43 has a PTFE layer (polytetrafluoroethylene layer). The PTFE layer 46 maintains smooth contact with the coating surface, which can effectively prevent scratches or wear damage to the coating surface caused by the roughness of the bottom surface of the base 4.

[0056] A stud 47 is fixed in the middle of the concave frame 42, and the sleeve 3 is screwed onto the stud 47. The top end of the spring 1 is connected to the bottom end of the stud 47. The sleeve 3 is installed by screwing it onto the stud 47, which facilitates the assembly of the spring 1 and the telescopic rod 2.

[0057] The telescopic rod 2 includes a first sliding part 21, a telescopic part 22, and a guide limiting part 23. The top end of the telescopic part 22 is fixed to the first sliding part 21, which is slidably connected to the sleeve 3. The bottom end of the spring 1 is connected to the top wall of the first sliding part 21. The side wall of the telescopic part 22 has a guide limiting part 23. The bottom wall of the sleeve 3 has a through hole 31 for the telescopic part 22 to pass through and a guide limiting hole 32 for the guide limiting part 23 to pass through. The guide limiting hole 32 communicates with the through hole 31. The guide limiting part 23 and the guide limiting hole 32 on the bottom wall of the sleeve 3 form a mating structure, providing a clear movement trajectory guide for the telescopic part 22 when it is installed through the through hole 31. This guiding function can prevent the telescopic part 22 from shifting or getting stuck during installation, ensuring precise alignment of the telescopic rod 2 and the sleeve 3, improving installation efficiency and structural stability. The guide limiting part 23 is embedded in the guide limiting hole 32. Through the cooperation of the two, the circumferential rotation (i.e., deflection around the axis) of the telescopic part 22 can be strictly constrained. This design structurally eliminates the possibility of the telescopic part 22 wobbling, thereby preventing the blade 6 from deflecting with the telescopic part 22 and ensuring that the blade 6 always maintains the preset vertical posture. Combined with the sliding connection between the first sliding part 21 and the sleeve 3 (constraining the vertical movement trajectory), and the restriction of circumferential and radial offset by the guide limiting structure, the telescopic rod 2 can only move in a straight line in the vertical direction. This ensures that the blade 6 only performs cutting actions perpendicular to the coating surface during the scribing operation, avoiding problems such as skewed scribing lines and uneven depth caused by multi-directional offset, and significantly improving the testing accuracy.

[0058] The telescopic rod 2 includes a second sliding part 24 and a second locking block 25. The bottom end of the telescopic part 22 is fixed with the second sliding part 24, and the left side wall of the second sliding part 24 is fixed with the second locking block 25. The top of the cutter holder 5 has a slide rail 51, and the second sliding part 24 slides in conjunction with the slide rail 51. The right end of the slide rail 51 penetrates the right side wall of the cutter holder 5, and the left side wall of the slide rail 51 has a second locking groove 52, which engages with the second locking block 25. When installing the cutter holder 5, align the right opening of the slide rail 51 with the second sliding part 24, and then push the cutter holder 5 to the right, causing the second sliding part 24 to slide into the slide rail 51 until the second locking block 25 engages with the second locking groove 52. The detachable connection between the cutter holder 5 and the telescopic rod 2 is achieved through the engagement of the second locking block 25 and the second locking groove 52. Furthermore, disassembly and assembly are convenient, requiring only simple left and right pushing and pulling of the cutter holder 5, without the need for additional tools.

[0059] The tool holder 5 also has a channel 53 located below the slide rail 51. The right end of the channel 53 penetrates the right side wall of the tool holder 5, and the left side wall of the channel 53 has a third slot 54. A third locking block 55 is fixed to the left side wall of the blade 6. The third slot 54 and the third locking block 55 engage in a locking mechanism, with the bottom end of the blade 6 protruding from the channel 53. When installing the blade 6, align the blade 6 with the right opening of the channel 53 and insert it to the left until the third locking block 55 engages with the third slot 54. The engagement of the third locking block 55 and the third slot 54 enables a detachable connection between the blade 6 and the tool holder 5. Furthermore, assembly and disassembly are convenient, requiring only simple left and right pushing and pulling of the blade 6 without the need for additional tools.

[0060] The blade 6 has several teeth 61 arranged along its length at its bottom end, with a spacing of 1-3mm between adjacent teeth 61. Blades 6 with different tooth spacings can be selected and replaced as needed to adapt to different marking requirements.

[0061] Example 2:

[0062] like Figure 11 As shown, the difference between this embodiment and Embodiment 1 is that:

[0063] An extension plate 7 is fixed to the inner wall of the base 4. The extension plate 7 has scale lines 8, and the bottom surface of the extension plate 7 is located above the bottom surface of the base 4. The combination of the extension plate 7 and the scale lines 8 makes it easy to ensure uniform grid spacing and allows for intuitive observation of grid spacing without relying on user experience or auxiliary rulers.

[0064] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A coating grid applicator, characterized in that: Includes base, sleeve, telescopic rod, spring, tool holder, and blade; The sleeve is vertically installed on the base; A telescopic rod is slidably connected inside the sleeve, and the bottom end of the telescopic rod extends out of the sleeve and is detachably connected to a tool holder; The bottom end of the spring is connected to the top end of the telescopic rod, the top end of the spring is connected to the base, and the spring is in a pre-compressed state. The blade is detachably connected to the blade holder, and the bottom end of the blade is located below the bottom surface of the base; The bottom surface of the base is horizontal, and the blade is perpendicular to the bottom surface of the base.

2. The coating gridding device according to claim 1, characterized in that: The base includes a U-shaped base plate, a concave frame, and a U-shaped bottom plate; A concave frame is fixed to the top of the U-shaped substrate; The bottom of the U-shaped substrate is detachably connected to a U-shaped base plate; The bottom surface of the U-shaped base plate is a horizontal plane.

3. The coating gridding device according to claim 2, characterized in that: The bottom of the U-shaped substrate is fixed with a first locking block at each of the four corners. The four corners of the top of the U-shaped base plate each have a first slot that engages with the first card block.

4. The coating gridding device according to claim 2, characterized in that: The bottom surface of the U-shaped base plate has a PTFE layer.

5. The coating gridding device according to claim 2, characterized in that: A stud is fixed in the middle of the concave frame, and the sleeve is screwed to the stud; The top end of the spring is connected to the bottom end of the stud.

6. The coating gridding device according to claim 1, characterized in that: The telescopic rod includes a first sliding part, a telescopic part, and a guide and limiting part; The top end of the telescopic part is fixed with a first sliding part, the first sliding part is slidably connected to the sleeve, and the bottom end of the spring is connected to the top wall of the first sliding part; The sidewall of the telescopic part has a guide limiting part; The bottom wall of the sleeve has a through hole for the telescopic part to pass through and a guide limiting hole for the guide limiting part to pass through; The guide limiting hole is connected to the through hole.

7. The coating grid applicator according to claim 6, characterized in that: The telescopic rod also includes a second sliding part and a second locking block; The bottom end of the telescopic part is fixed with a second sliding part, and the left side wall of the second sliding part is fixed with a second locking block; The top of the tool holder has a slide rail, and the second sliding part slides in conjunction with the slide rail; The right end of the slide rail penetrates the right side wall of the tool holder, and the left side wall of the slide rail has a second slot. The second card slot engages with the second card block.

8. The coating grid applicator according to claim 7, characterized in that: The tool holder also has a channel located below the slide, the right end of the channel penetrating the right side wall of the tool holder, and the left side wall of the channel having a third slot. A third locking block is fixed to the left side wall of the blade, and the third locking groove engages with the third locking block. The bottom end of the blade extends through the insertion channel.

9. The coating gridding device according to claim 1, characterized in that: The bottom end of the blade has a plurality of cutting teeth arranged along the length direction of the blade; The spacing between adjacent cutting teeth is 1-3 mm.

10. The coating gridding device according to claim 1, characterized in that: An extension plate is fixed to the inner wall of the base, and the extension plate has scale lines. The bottom surface of the extension plate is located above the bottom surface of the base.

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