Testing device for measuring curing rate of paint film

Abstract

The utility model discloses a testing device for measuring the curing rate of a paint film. The testing device comprises a base, a stand column is arranged on the base, a rotatable support is arranged on the stand column, a pressure applying mechanism is arranged on the side, away from the stand column, of the support, and the lower end of the pressure applying mechanism is detachably connected with various types of pressure heads; a slidable test plate fixing seat is further arranged on the base, a detachable test plate is arranged on the test plate fixing seat, the test plate is used for coating a paint film, and the pressure head is arranged towards the test plate and is used for pressing the paint film. According to the test device, through the arrangement of the pressure head and the test plate, the drying state of the paint film can be represented in a quantitative form according to the set applied pressure and the pattern area of the indentation generated on the surface of the paint film, so that the curing rate of the paint film can be analyzed more directly.

Description

Technical Field

[0001] The utility model relates to the technical field of detection equipment, in particular to a test device for measuring the curing rate of a paint film. Background Art

[0002] The process of coating film formation, also known as coating drying and curing, is the process of coating transformation from liquid or loose powder to a dense, complete solid film after being applied to a surface. The drying performance of a paint film is one of its important performance parameters, often expressed in terms of drying time. The coating film curing process can be divided into three key stages:

[0003] (1) Surface dryness: Dry to the touch or surface dryness. When the paint film feels sticky when touched by the finger, but no paint sticks to the finger;

[0004] (2) Actual drying: When the paint film is lightly pressed with a finger, there is no finger mark on the paint film;

[0005] (3) Completely dry: Press the paint film hard with your fingers, and no finger marks will remain on the paint film, and the paint film reaches the specified hardness.

[0006] If the paint film drying time is too long, it will easily pick up dust, impurities, and other pollutants from the environment during the drying process, which will not only affect the appearance and performance of the paint film, but also easily delay the construction schedule. If the drying time is too short, the paint film will easily become rough, have poor leveling, and have uneven film thickness, which will also affect the performance of the paint film. Therefore, by adjusting the paint formula or ratio and measuring the paint film drying time, it is possible to screen the most suitable paint product or construction process.

[0007] When measuring the drying time of a coating, usually only the two stages of surface drying and actual drying are measured. In the prior art, a paint film drying time tester is generally used for measurement. By observing the trajectory state formed by a uniformly moving stylus on the paint film within a specified time, the time taken by the paint film in each stage of the drying process is determined. Common trajectories are divided into circular trajectories or straight line (line segment) trajectories. The circular trajectory takes a long time and is not suitable for occasions where the paint film drying time is short; the straight line (line segment) trajectory takes a shorter time to measure, but the measurement accuracy is not high for occasions where the paint film drying time is long. In addition, there is no load on the stylus. For paint films with a thicker film thickness, the unclear trajectory state will lead to errors in the test results. Summary of the Invention

[0008] The purpose of the utility model is to provide a test device for measuring the curing rate of a paint film in view of the problems existing in the prior art.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A test device for measuring the curing rate of a paint film comprises a base, a column is provided on the base, a rotatable bracket is provided on the column, a pressure mechanism is provided on the side of the bracket away from the column, and the lower end of the pressure mechanism is detachably connected to various types of pressure heads; the base is also provided with a slidable test plate fixing seat, the test plate fixing seat is provided with a detachable test plate, the test plate is used to apply a paint film, and the pressure head is arranged toward the test plate and used to press the paint film.

[0011] By setting the indenter and the test plate, the test device can quantitatively characterize the drying state of the paint film according to the set applied pressure and the graphic area of the indentation produced on the paint film surface, thereby more directly analyzing the curing rate of the paint film.

[0012] This test device has the characteristics of simple structure, easy assembly and use, and high flexibility. It can select different types of pressure heads according to the thickness of the paint film, avoiding the situation where errors in the test results are caused by the mismatch between the large film thickness and the pressure head. It can more accurately measure the drying time and curing rate of coating products with large film thickness.

[0013] The test panel holder can slide relative to the base, thereby changing the horizontal position of the test panel and allowing the indenter to form indentations at different locations on the test panel to facilitate testing. By recording the pressure data, indentation state, and indentation area of each indentation at different locations, as well as the interval between each pressure application, the change in pressure from the time an indentation appears to the time it disappears is used to analyze and calculate the curing rate of the paint film.

[0014] Furthermore, the pressure mechanism is hydraulically driven or electrically driven, and has a hydraulic rod or an electric pressure rod, and the end of the hydraulic rod or the electric pressure rod is connected to the pressure head.

[0015] Furthermore, the pressure head is provided with a pressure head connecting column, and the lower end of the pressure mechanism is provided with a threaded hole or a multi-jaw chuck connected to the pressure head connecting column, both of which can relatively stably fix the pressure head and facilitate the installation or disassembly of the pressure head.

[0016] Furthermore, the pressure head includes a first pressure head whose orthographic projection shape is a square, the vertical section of the first pressure head is an inverted trapezoid, and the hypotenuse of the inverted trapezoid is arranged step by step from bottom to top.

[0017] Furthermore, the indenter also includes a second indenter with a circular orthographic projection shape. The vertical cross-section of the second indenter is an inverted cone structure with a relatively sharp end, which is suitable for testing thicker paint films.

[0018] Furthermore, the bracket is provided with a controller and a control screen electrically connected to the controller, and the controller is electrically connected to the pressure mechanism.

[0019] Furthermore, a sleeve is provided on one side of the bracket, and the sleeve is sleeved on the column and fastened by a locking screw. A limiting ring for supporting the sleeve is also provided on the column.

[0020] Furthermore, the test plate fixing seat is provided with a plurality of fixing clamps or horizontal pressing clamps for fixing the test plate.

[0021] Furthermore, the test plate fixing seat is an electric slide, which is easily controlled and adjusted after being electrically connected to the controller.

[0022] Compared with the prior art, the present invention has the following beneficial effects: 1. The test device, through the arrangement of the indenter and the test plate, can quantitatively characterize the drying state of the paint film according to the set applied pressure and the graphic area of the indentation produced on the paint film surface, thereby enabling a more direct analysis of the curing rate of the paint film;

[0023] 2. This test device also has the characteristics of simple structure, easy assembly and use, and high flexibility. It can select different types of indenters according to the thickness of the paint film, avoiding the situation where errors in the test results are caused by the mismatch between the thick film and the indenter. It can more accurately measure the drying time and curing rate of coating products with thick films. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an overall schematic diagram of a test device for measuring the curing rate of a paint film according to the present invention;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the first pressure head of the utility model;

[0026] Figure 3 This is a schematic diagram of the end surface structure of the first pressure head of the utility model;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the second pressure head of the utility model;

[0028] Figure 5 This is a schematic diagram of the end surface structure of the second pressure head of the utility model;

[0029] Figure 6 This is a schematic diagram of the components that drive the test plate fixing seat to move in the test device of the present utility model;

[0030] In the figure: 1. Base; 2. Column; 3. Bracket; 4. Pressure mechanism; 5. Pressure head; 501. First pressure head; 502. Second pressure head; 6. Test plate fixing seat; 7. Test plate; 8. Control panel; 9. Sleeve; 10. Locking screw; 11. Limiting ring; 12. Horizontal pressure clamp; 13. Mounting slot; 14. Bearing support seat; 15. Guide rod; 16. Screw; 17. Guide slide; 18. Threaded slide; 19. Stepper motor. DETAILED DESCRIPTION

[0031] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] like Figure 1 As shown, a test device for measuring the curing rate of a paint film comprises a base 1, a column 2 is provided on the base 1, a rotatable bracket 3 is provided on the column 2, a pressure mechanism 4 is provided on the side of the bracket 3 away from the column 2, and various types of pressure heads 5 are detachably connected to the lower end of the pressure mechanism 4. A slidable test plate fixing seat 6 is also provided on the base 1, and a detachable test plate 7 is provided on the test plate fixing seat 6. The test plate 7 is used for coating a paint film, and the pressure head 5 is arranged toward the test plate 7 and is used for pressing the paint film.

[0034] By setting the indenter and the test plate, the test device can quantitatively characterize the drying state of the paint film according to the set applied pressure and the graphic area of the indentation produced on the paint film surface, thereby more directly analyzing the curing rate of the paint film.

[0035] This test device also has the characteristics of simple structure, easy assembly and use, and high flexibility. It can select different types of pressure heads according to the thickness of the paint film, avoiding the situation where errors in the test results are caused by the mismatch between the large film thickness and the pressure head, and can more accurately measure the drying time and curing rate of coating products with large film thickness.

[0036] The base 1 and the column 2 provide a basic support and mounting structure for the arrangement of components such as the bracket 3 and the test plate 7. The bracket 3 can rotate relative to the column 2 so that the bracket 3 can be moved out from directly above the test plate 7, making it convenient to replace the pressure head and take the test plate out.

[0037] The pressure mechanism 4 can drive the pressure head 5 to move up and down, and continuously provide pressure to the pressure head 5 when the pressure head 5 presses the test plate 7, so as to cause an indentation on the paint film on the test plate 7, and the pressure during the pressure application process is controllable, adjustable and recordable.

[0038] The test plate fixing seat 6 is configured to clamp the test plate 7 to prevent the test plate 7 from shaking during the pressure application process and causing measurement errors; the pressure head 5 is usually facing the test plate 7. Preferably, in the initial state, the pressure head corresponds to the center point of the test plate.

[0039] The test plate fixing seat 6 can slide relative to the base 1, thereby changing the horizontal position of the test plate 7, and further allowing the indenter 5 to form indentations at different positions of the test plate 7 to facilitate the conduct of the test.

[0040] The principle of this test device is as follows: a test plate coated with a paint film and dried to the surface is fixed to the test plate base. The pressure mechanism is activated. After the pressure head presses the paint film for a certain period of time, the pressure is stopped and the pressure head is raised. The indentation state of the paint film on the test plate is immediately observed and the graphical area of the indentation is recorded. After a specified time interval, the relative position of the test plate and the pressure head is changed by sliding the test plate holder. Pressure is applied again and the indentation state and graphical area of the indentation are recorded. This operation is repeated multiple times until no indentation appears on the paint film surface. By calculating the graphical area of the indentation recorded at different time intervals and the set applied pressure, the pressure to which the paint film was subjected in its dry state at that time is calculated. By analyzing the pressure data at each time interval, the curing rate of the paint film can be obtained. In other words, by recording the pressure data, indentation state, and graphical area of each indentation at different positions, as well as the interval between each pressure application, the change in pressure from the appearance of indentation to the disappearance of indentation can be analyzed and calculated.

[0041] Furthermore, the pressure-applying mechanism 4 is hydraulically or electrically driven, and comprises a hydraulic rod or an electric pressure rod, respectively, the ends of which are connected to the pressure head 5. This type of pressure-applying mechanism can be purchased from commercially available, mature products, and the pressure level can be monitored in real time during the pressure application process. Alternatively, an electric hydraulic push rod can be used, which is typically equipped with a hydraulic pump, a pressure regulating valve, a sensor, and other components, allowing for easy acquisition and regulation of pressure values.

[0042] Furthermore, the pressure head 5 is provided with a pressure head connecting post, and the lower end of the pressure mechanism 4, that is, the output end of the hydraulic rod or electric pressure rod, is provided with a threaded hole or a multi-jaw chuck for connecting to the pressure head connecting post. The connecting post can be connected by a threaded connection or clamped by a multi-jaw chuck. Both methods can relatively stably fix the pressure head and facilitate the installation and removal of the pressure head.

[0043] Further, such as Figure 2 and 3 As shown, the indenter 5 includes a first indenter 501 with a square orthographic projection. The vertical cross-section of the first indenter 501 is an inverted trapezoid, with the hypotenuse arranged in a step-like manner from bottom to top. This indenter shape provides a flat pressure surface, and the step-by-step arrangement makes it easy to observe the indentation and the indentation area. This type of indenter is suitable for testing paint films of normal thickness or thinner thickness.

[0044] Further, such as Figure 4 and 5 As shown, the indenter 5 also includes a second indenter 502 whose orthographic projection shape is a circle. The vertical section of the second indenter 502 is an inverted cone structure. This type of indenter has a relatively sharp end and stronger penetrating power, and is suitable for testing thicker paint films.

[0045] Furthermore, the bracket 3 is provided with a controller and a control panel 8 electrically connected to the controller, and the controller is electrically connected to the pressure mechanism.

[0046] Through the arrangement of the controller and the control screen 8 , it is convenient to control the pressure mechanism 4 to drive the pressure head to move up and down, and the pressure value of the pressure mechanism can also be set on the control screen 8 .

[0047] Furthermore, a sleeve 9 is provided on one side of the bracket 3. The sleeve 9 is mounted on the column 2 and fastened by a locking screw 10. This locking method is simple and convenient to use. A retaining ring 11 is also provided on the column 2 to support the sleeve 9. A retaining ring can also be provided above to prevent the bracket 3 from moving up and down. In some embodiments, the rotation of the bracket 3 can also be driven electrically.

[0048] Furthermore, the test plate fixing base 6 is provided with a plurality of fixing clamps or horizontal pressing pliers 12 for fixing the test plate 7. The horizontal pressing pliers 12 can be directly purchased from mature commercial products, such as horizontal quick pressing pliers, which generally have a handle and an adjustable pressing rod with a protective cover at the end of the pressing rod. A thinner pressing rod (with a smaller end) can be selected.

[0049] Furthermore, the test plate fixing seat 6 is an electric slide, which can drive the test plate to move horizontally.

[0050] Specifically, such as Figure 6 As shown, the base 1 is provided with a mounting groove 13, within which a pair of guide rods 15 are connected via a bearing support 14. A lead screw 16 is connected to the area between the pair of guide rods 15 via the bearing support 14. A guide slide 17 is provided on the guide rod 15, and a threaded slide 18 is provided on the lead screw 16. The guide slide 17 and the threaded slide 18 are connected and mounted to the test plate fixing base 6. One end of the lead screw 16 is also connected to a stepper motor 19, which is also electrically connected to the controller. The pair of guide rods 15 and the lead screw 16 are arranged in parallel.

[0051] When the test plate fixing seat 6 needs to slide, the stepping motor 19 can drive the screw rod 16 to rotate, and the screw rod 16 drives the threaded slide 18 to move linearly, thereby driving the test plate fixing seat 6 to move.

[0052] In some embodiments, the electric slide may also be a slide structure capable of moving in X / Y bidirectional directions.

[0053] This test device is used to determine the curing rate of paint films. The following steps are taken:

[0054] (1) Selecting a suitable test plate and applying the coating on the test plate to form a paint film;

[0055] (2) After the paint film coated on the test plate is dry, preliminarily determine (estimate) the pressure value at which the paint film produces an indentation, and select a suitable indenter based on the film thickness of the paint film;

[0056] (3) Fix the test plate on the test plate fixing seat, rotate the bracket on the column, for example, rotate 90 degrees, install the pressure head, and then set the pressure value;

[0057] (4) Start the pressure mechanism, which drives the pressure head to move downward and press onto the paint film. After the pressure head presses the paint film for a certain period of time, stop pressing and lift the pressure head. Immediately observe the indentation state of the test plate paint film and record the graphic area of the indentation. After a specified time interval, change the relative position of the test plate and the pressure head by sliding the test plate fixing seat, apply pressure again and record the indentation state and graphic area. Repeat the operation multiple times until no indentation appears on the paint film surface. By calculating the indentation graphic area recorded at different time intervals and the set applied pressure, calculate the pressure that the paint film was subjected to in the dry state at that time.

[0058] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for measuring the curing rate of a paint film, characterized in that: It includes a base, a column is provided on the base, a rotatable bracket is provided on the column, a pressure mechanism is provided on the side of the bracket away from the column, and the lower end of the pressure mechanism is detachably connected to various types of pressure heads; the base is also provided with a slidable test plate fixing seat, the test plate fixing seat is provided with a detachable test plate, the test plate is used to apply a paint film, and the pressure head is set toward the test plate and used to press the paint film.

2. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The pressure mechanism is hydraulically driven or electrically driven and comprises a hydraulic rod or an electric pressure rod, and the end of the hydraulic rod or the electric pressure rod is connected to the pressure head.

3. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The pressure head is provided with a pressure head connecting column, and the lower end of the pressure mechanism is provided with a threaded hole or a multi-jaw chuck connected to the pressure head connecting column.

4. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The pressure head comprises a first pressure head with a square shape in orthographic projection. The vertical section of the first pressure head is an inverted trapezoid, and the hypotenuse of the inverted trapezoid is arranged step by step from bottom to top.

5. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The pressure head further includes a second pressure head whose orthographic projection shape is a circle, and the vertical cross section of the second pressure head is an inverted cone structure.

6. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The bracket is provided with a controller and a control screen electrically connected to the controller, and the controller is electrically connected to the pressure mechanism.

7. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: A sleeve is provided on one side of the bracket. The sleeve is sleeved on the column and fastened by a locking screw. A limiting ring for supporting the sleeve is also provided on the column.

8. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The test plate fixing seat is provided with a plurality of fixing clamps or horizontal pressing clamps for fixing the test plate.

9. The test device for measuring the curing rate of a paint film according to claim 1, characterized in that: The test plate fixing seat is an electric slide.

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