A Composite Coating Performance Testing Device and Testing Method

Abstract

The present invention provides a composite coating performance testing device, including a testing component and a driving component, and the driving component is installed inside the testing component; the testing component includes a connecting pipe and a fixing frame, and the two feet of the fixing frame are fixedly connected to both sides of the driving component. An air pump and an induced draft fan are arranged on the upper end surface of the fixing frame. One end of the connecting pipe penetrates through the lower end surface of the fixing frame, and a syringe is arranged at the end of the connecting pipe penetrating through the fixing frame. A grinding mechanism is arranged outside the connecting pipe, and the other end of the connecting pipe penetrates through the grinding mechanism. The air pump is communicated with the inside of the connecting pipe through a group of air pipes; the grinding mechanism includes a mounting disc, several groups of grinding blocks are arranged on the upper end surface of the mounting disc, and positioning pipes equal in number to the grinding blocks are arranged on the lower end surface of the mounting disc. The present invention can measure the wear-resistant data of coatings with different parameters at one time, and at the same time ensure that the properties of the coatings ground each time are basically the same, further improving the test accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of coating testing, and specifically to a composite coating performance testing device and a testing method. Background Art

[0002] Wear resistance is one of the physical properties of coatings, which directly affects the service life of coatings.

[0003] The patent with the publication number CN202210650383.1 discloses a wear resistance testing device for energy-saving building coatings, which can replace weight blocks of different specifications as needed, and the replacement process can be completed automatically; it can perform automatic weighing and can timely remove the ground dust.

[0004] It uses experimental blocks as grinding materials, and it cannot ensure that the coatings ground by different weight blocks have the same properties after replacing the weight blocks; and a large number of driving components are required for replacing the weight blocks, making the replacement inconvenient; at the same time, heat is generated during grinding, which affects the grinding results. Summary of the Invention

[0005] (I) Technical Problems to be Solved

[0006] In view of the deficiencies of the prior art, the present invention provides a composite coating performance testing device, including a testing component and a driving component, and the driving component is installed inside the testing component;

[0007] The testing component includes a connecting pipe and a fixing frame. The two feet of the fixing frame are fixedly connected to both sides of the driving component. An air pump and an induced draft fan are arranged on the upper end surface of the fixing frame. One end of the connecting pipe penetrates the lower end surface of the fixing frame, and a syringe is arranged at the end of the connecting pipe penetrating the fixing frame. A grinding mechanism is arranged outside the connecting pipe, and the other end of the connecting pipe penetrates the grinding mechanism. The air pump is communicated with the inside of the connecting pipe through a group of air pipes;

[0008] The grinding mechanism includes a mounting disk. A number of grinding blocks are arranged on the upper end surface of the mounting disk, and positioning pipes equal in number to the grinding blocks are arranged on the lower end surface of the mounting disk;

[0009] The driving component includes a first platform, a detection table, a second platform and a base. The second platform is fixedly connected to the upper end surface of the base through a support column. The first platform is fixedly connected to the upper end surface of the second platform through a support column. The detection table is arranged on the upper end surface of the first platform.

[0010] As a further preference, a number of the grinding blocks are slidably connected to the upper end surface of the mounting disk, and the grinding blocks penetrate the upper end surface of the mounting disk. The positions of the grinding blocks are adapted to the positioning pipes.

[0011] As a further preference, the installation disk is hollow inside, and the induced draft fan is connected to the inside of the installation disk through an air pipe.

[0012] As a further preference, the test bench includes a boss and a rotating shaft. One end of the rotating shaft is fixedly connected to the lower end surface of the boss. A gear is arranged outside the rotating shaft, and two groups of threaded pipes are arranged at intervals on the lower end surface of the boss.

[0013] As a further preference, a coil pipe is arranged inside the boss, and both ends of the coil pipe are respectively connected to the two groups of threaded pipes.

[0014] As a further preference, it further includes a water tank, and the water tank is respectively connected to the two groups of threaded pipes through two groups of water pipes.

[0015] As a further preference, the second platform includes a second platform main body. A rack is slidably connected to the upper end surface of the second platform main body. The rack is engaged with the gear. One end of the rack is rotatably connected to a connecting rod, and the other end of the connecting rod is rotatably connected to an eccentric wheel through a rotating connection column. Two groups of limiting columns are arranged at intervals on the upper end surface of the second platform main body, and the limiting columns are used for limiting the rack.

[0016] As a further preference, the base includes a base main body. A driving motor and a testing motor are installed on the upper end surface of the base main body. The output end of the driving motor is fixedly connected to the other end of the rotating shaft, and the output end of the testing motor is fixedly connected to the eccentric wheel through a rotating shaft.

[0017] As a further preference, for a testing method of a composite coating performance testing device, during the coating abrasion resistance test, a certain amount of coating is sucked into a syringe, then the syringe is installed on the connecting pipe, and then part of the coating is extruded onto the boss. The test bench is driven by the driving motor to rotate to evenly spread the coating on the upper end surface of the boss. Then, an air pump is used to blow air through the connecting pipe onto the upper end surface of the boss. The gas flow speeds up the drying speed of the coating. At the same time, the pressure of the gas flowing on the surface of the coating can also prevent the coating from foaming during drying. After the coating is completely dried, the grinding block required for the test is installed on the installation disk. Then, the water tank is respectively connected to the two groups of threaded pipes through two groups of water pipes. Then, the rack is adjusted to be engaged with the gear, and the limiting columns are used for limiting. Then, the eccentric wheel is driven to rotate by the testing motor. Thus, the eccentric wheel drives the rack to perform a linear reciprocating motion through the connecting rod, and further makes the test bench perform periodic forward and reverse rotations. The grinding block will grind the coating on the surface of the boss. At the same time, the induced draft fan is started to suck away the coating powder ground by the grinding block. Water inside the water tank is introduced into the coil pipe inside the boss through the threaded pipe by a water pump to form a water flow cycle to maintain a constant temperature of the coating during grinding.

[0018] (2) Beneficial effects

[0019] The present invention provides a composite coating performance testing device and a testing method, which have the following beneficial effects: Through the testing component and the driving component, the composite coating performance testing device enables the production of a coating layer as a testing material on-site. A number of sets of grinding blocks are provided on the grinding mechanism. The roughness and weight at the bottom of the number of sets of grinding blocks can be freely configured. At the same time, the contour of the figure formed by the number of sets of grinding blocks is circular, and there are intervals between the number of sets of positioning tubes. When the testing motor drives the eccentric wheel to rotate, the eccentric wheel drives the rack to perform a linear reciprocating motion through the connecting rod, thereby driving the testing platform to rotate forward and reverse periodically. When the testing platform rotates forward and reverse to the limit, the grinding ranges of the number of sets of grinding blocks on the testing platform do not overlap, making the grinding conditions of the grinding blocks on the coating basically the same, and the corresponding coatings are also basically the same, effectively improving the testing accuracy. Moreover, different condition testing results can be obtained at one time during the grinding test. At the same time, two sets of threaded tubes are arranged at intervals on the lower end surface of the convex platform, a coil pipe is arranged inside the convex platform, and both ends of the coil pipe are connected to the two sets of threaded tubes respectively. The water tank is connected to the two sets of threaded tubes through two water pipes respectively. The water pump inside the water tank passes water through the threaded tubes into the coil pipe inside the convex platform, which can maintain the temperature of the convex platform during the grinding test on the convex platform, further improving the accuracy of the coating wear resistance test. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the composite coating performance testing device of the present invention;

[0021] Figure 2 is a schematic structural diagram of the testing component of the present invention;

[0022] Figure 3 is a schematic structural diagram of the grinding mechanism of the present invention;

[0023] Figure 4 is a schematic bottom view structural diagram of the grinding mechanism of the present invention;

[0024] Figure 5 is a schematic structural diagram of the driving component of the present invention;

[0025] Figure 6 is a schematic structural diagram of the first platform of the present invention;

[0026] Figure 7 is a schematic bottom view structural diagram of the testing platform of the present invention;

[0027] Figure 8 is a schematic structural diagram of the second platform of the present invention;

[0028] Figure 9 is a schematic structural diagram of the base of the present invention.

[0029] In the figure: 1 is a test component, 11 is a syringe, 12 is an air pump, 13 is a connecting pipe, 14 is a grinding mechanism, 141 is a mounting plate, 142 is a grinding block, 143 is a positioning pipe, 15 is a fixing bracket, 16 is an induced draft fan, 2 is a driving component, 21 is a first platform, 22 is a detection table, 221 is a boss, 222 is a rotating shaft, 223 is a gear, 224 is a threaded pipe, 23 is a second platform, 231 is a second platform body, 232 is a connecting rod, 233 is an eccentric wheel, 234 is a rack, 235 is a limit post, 24 is a base, 241 is a base body, 242 is a driving motor, 243 is a test motor, 3 is a water tank. Detailed implementation mode

[0030] The following describes in detail the implementation mode of the present invention. Examples of the implementation mode are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The implementation mode described below by referring to the drawings is exemplary and is only used to explain the present invention and should not be construed as a limitation of the present invention.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection, an electrical connection, or a connection that can communicate with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0033] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0035] As Figures 1-5 shown, this embodiment provides a composite coating performance testing device and a testing method, including a testing component 1 and a driving component 2, and the driving component 2 is installed inside the testing component 1;

[0036] The testing component 1 includes a connecting pipe 13 and a fixing frame 15. The two feet of the fixing frame 15 are fixedly connected to both sides of the driving component 2. An air pump 12 and an induced draft fan 16 are arranged on the upper end surface of the fixing frame 15. One end of the connecting pipe 13 penetrates the lower end surface of the fixing frame 15, and a syringe 11 is arranged at the end of the connecting pipe 13 penetrating the fixing frame 15. A grinding mechanism 14 is arranged outside the connecting pipe 13, and the other end of the connecting pipe 13 penetrates the grinding mechanism 14. The air pump 12 is communicated with the inside of the connecting pipe 13 through a group of air pipes;

[0037] The grinding mechanism 14 includes a mounting plate 141. A plurality of groups of grinding blocks 142 are arranged on the upper end surface of the mounting plate 141, and positioning pipes 143 equal in number to the grinding blocks 142 are arranged on the lower end surface of the mounting plate 141;

[0038] The driving component 2 includes a first platform 21, a detection table 22, a second platform 23 and a base 24. The second platform 23 is fixedly connected to the upper end surface of the base 24 through a support column, the first platform 21 is fixedly connected to the upper end surface of the second platform 23 through a support column, and the detection table 22 is arranged on the upper end surface of the first platform 21.

[0039] Specifically, the syringe 11 is detachably connected to the connecting pipe 13. The paint can be inhaled through the syringe 11 and then injected onto the driving assembly 2 through the connecting pipe 13 by the syringe 11. Since the outer diameter of the syringe 11 is the same as the inner diameter of the connecting pipe 13, when the syringe 11 injects the paint, the paint will not stick to the inner wall of the connecting pipe 13.

[0040] Further, several groups of grinding blocks 142 are slidably connected to the upper end surface of the mounting plate 141, and the grinding blocks 142 penetrate through the upper end surface of the mounting plate 141. The positions of the grinding blocks 142 are adapted to the positioning pipes 143.

[0041] It should be noted that the upper end surface of the mounting plate 141 is provided with a limiting groove adapted to the size of the grinding block 142. The cross-section of the grinding block 142 is fan-shaped. When the grinding block 142 is slidably connected to the mounting plate 141, it is limited by the limiting groove and can only be slidably connected. The inner diameter of the positioning pipe 143 is larger than the outer diameter of the grinding block 142, so that the paint powder ground by the grinding block 142 can be quickly sucked out by the induced draft fan 16 through the positioning pipe 143, thereby preventing the paint powder from participating in the grinding process and affecting the grinding result. The roughness and weight of the bottoms of several groups of grinding blocks 142 can be freely matched and set to obtain grinding results with different parameters.

[0042] Further, the interior of the mounting plate 141 is hollow, and the induced draft fan 16 is connected to the interior of the mounting plate 141 through an air pipe.

[0043] Specifically, the interior of the mounting plate 141 is communicated with the positioning pipe 143, and the suction force generated by the induced draft fan 16 acts on the grinding area of the paint by the positioning pipe 143.

[0044] It should be noted that the outline of the figure formed by several groups of grinding blocks 142 is circular, and there are spaces between several groups of grinding blocks 142.

[0045] As Figure 7 shown, the inspection table 22 includes a boss 221 and a rotating shaft 222. One end of the rotating shaft 222 is fixedly connected to the lower end surface of the boss 221, a gear 223 is arranged outside the rotating shaft 222, and two groups of threaded pipes 224 are arranged at intervals on the lower end surface of the boss 221.

[0046] Specifically, there is a space between the first platform 21, the second platform 23 and the base 24. As Figure 6 shown, a groove is provided on the upper end surface of the first platform 21, and this groove is used to limit the boss 221.

[0047] It should be noted that the boss 221 corresponds to the mounting plate 141 in the vertical direction, and the paint ejected by the syringe 11 will fall onto the upper end surface of the boss 221.

[0048] Furthermore, a coil is provided inside the boss 221 , and both ends of the coil are connected to two groups of threaded tubes 224 respectively.

[0049] Furthermore, it also includes a water tank 3, which is connected to the two groups of threaded pipes 224 through two groups of water pipes.

[0050] Specifically, water is introduced into the coil from one set of threaded tubes 224, and then flows out from another set of threaded tubes 224. A water pump is provided inside the water tank 3, connected to one set of threaded tubes 224 via water pipes. This pump pumps water from the water tank 3 through the threaded tubes 224 into the coil inside the boss 221, maintaining the temperature of the boss 221 during the grinding test. The water pipes and threaded tubes 224 are detachably connected.

[0051] like Figure 8 As shown, the second platform 23 includes a second platform body 231, and the upper end surface of the second platform body 231 is slidingly connected to a rack 234, the rack 234 is engaged with the gear 223, one end of the rack 234 is rotatably connected to the connecting rod 232, and the other end of the connecting rod 232 is rotatably connected to the eccentric wheel 233 through a rotating connecting column. Two groups of limiting columns 235 are arranged at intervals on the upper end surface of the second platform body 231, and the limiting columns 235 are used to limit the rack 234.

[0052] Specifically, the limiting column 235 is detachably connected to the second platform body 231. When the rack 234 is engaged with the gear 223, the side of the rack 234 away from the gear 223 slides relative to the two groups of limiting columns 235. By removing the limiting column 235 and rotating the rack 234, the rack 234 and the gear 223 are released from engagement.

[0053] Further, such as Figure 9 As shown, the base 24 includes a base body 241, and a drive motor 242 and a test motor 243 are installed on the upper end surface of the base body 241. The output end of the drive motor 242 is fixedly connected to the other end of the rotating shaft 222, and the output end of the test motor 243 is fixedly connected to the eccentric wheel 233 through the rotating shaft.

[0054] Specifically, the driving motor 242 is connected to the rotating shaft 222 via a coupling. The driving motor 242 is used to drive the rotating shaft 222 to rotate, and the testing motor 243 can drive the eccentric wheel 233 to rotate.

[0055] It should be noted that when the test motor 243 drives the eccentric wheel 233 to rotate, the eccentric wheel 233 drives the rack 234 to perform linear reciprocating motion through the connecting rod 232, thereby driving the test platform 22 to perform periodic forward and reverse rotation.

[0056] Moreover, when the inspection table 22 rotates forward and backward to the limit, the grinding ranges of several groups of grinding blocks 142 on the inspection table 22 do not overlap.

[0057] During the paint wear resistance test, a certain amount of paint is sucked into the syringe 11, then the syringe 11 is installed on the connecting pipe 13, and then part of the paint is extruded onto the convex platform 221. The inspection table 22 is rotated by the driving motor 242 to evenly spread the paint on the upper end surface of the convex platform 221. Then, the air pump 12 blows air through the connecting pipe 13 onto the upper end surface of the convex platform 221. The flow of the gas speeds up the drying speed of the paint. At the same time, the pressure of the gas flowing on the surface of the paint can also prevent the paint from foaming during drying. After the paint is completely dry, the grinding blocks 142 required for the test are installed on the mounting disc 141. Then, the water tank 3 is connected to the two groups of threaded pipes 224 through two groups of water pipes respectively. Then, the rack 234 is adjusted to mesh with the gear 223 and is limited by the limit post 235. Then, the eccentric wheel 233 is rotated by the test motor 243. Thus, the eccentric wheel 233 drives the rack 234 to perform a linear reciprocating motion through the connecting rod 232, and further makes the inspection table 22 rotate forward and backward periodically. The grinding blocks 142 grind the paint on the surface of the convex platform 221. At the same time, the induced draft fan 16 is started to suck away the paint powder ground by the grinding blocks 142. Water inside the water tank 3 is introduced into the coiled pipe inside the convex platform 221 through the threaded pipe 224 by the water pump to maintain a constant temperature of the paint during grinding, effectively improving the accuracy of the wear resistance test.

[0058] In summary, a composite coating performance testing device and a testing method provided by the present invention, through the testing component 1 and the driving component 2, enable the production of a coating layer as a test material on-site. There are several groups of grinding blocks 142 provided on the grinding mechanism 14. The roughness and weight at the bottom of several groups of grinding blocks 142 can be freely matched and set. At the same time, the contour of the figure formed by several groups of grinding blocks 142 is circular, and there are intervals between several groups of positioning tubes 143. When the testing motor 243 drives the eccentric wheel 233 to rotate, the eccentric wheel 233 drives the rack 234 to perform a linear reciprocating motion through the connecting rod 232, thereby driving the detection table 22 to rotate forward and reverse periodically. When the detection table 22 rotates forward and reverse to the limit, the grinding ranges of several groups of grinding blocks 142 on the detection table 22 do not overlap, making the grinding conditions of the grinding blocks 142 on the coating basically the same, and the corresponding coatings are also basically the same, effectively improving the testing accuracy. Moreover, different test results under different conditions can be obtained at one time during the grinding test. At the same time, two groups of threaded tubes 224 are arranged at intervals on the lower end surface of the convex platform 221. A coiled pipe is arranged inside the convex platform 221, and both ends of the coiled pipe are respectively connected to the two groups of threaded tubes 224. The water tank 3 is connected to the two groups of threaded tubes 224 through two water pipes respectively. The water tank 3 pumps water into the coiled pipe inside the convex platform 221 through the threaded tubes 224 by means of the water pump inside, which can maintain the temperature of the convex platform 221 during the grinding test on the convex platform 221, and further improve the accuracy of the coating wear resistance test.

[0059] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made in these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite coating performance testing device, characterized in that: It includes a test component (1) and a drive component (2), and the drive component (2) is installed inside the test component (1); The test component (1) includes a connecting pipe (13) and a fixing frame (15). The two feet of the fixing frame (15) are fixedly connected to both sides of the drive component (2). An air pump (12) and an induced draft fan (16) are arranged on the upper end surface of the fixing frame (15). One end of the connecting pipe (13) penetrates the lower end surface of the fixing frame (15), and a syringe (11) is arranged at the end of the connecting pipe (13) that penetrates the fixing frame (15). A grinding mechanism (14) is arranged outside the connecting pipe (13), and the other end of the connecting pipe (13) penetrates the grinding mechanism (14). The air pump (12) is connected to the inside of the connecting pipe (13) through a group of air pipes; The grinding mechanism (14) includes a mounting disc (141). A number of grinding blocks (142) are arranged on the upper end surface of the mounting disc (141). A positioning pipe (143) equal in number to the grinding blocks (142) is arranged on the lower end surface of the mounting disc (141); The drive component (2) includes a first platform (21), a detection table (22), a second platform (23), and a base (24). The second platform (23) is fixedly connected to the upper end surface of the base (24) through a support column. The first platform (21) is fixedly connected to the upper end surface of the second platform (23) through a support column. The detection table (22) is arranged on the upper end surface of the first platform (21); The detection table (22) includes a boss (221) and a rotating shaft (222). One end of the rotating shaft (222) is fixedly connected to the lower end surface of the boss (221). A gear (223) is arranged outside the rotating shaft (222). Two threaded pipes (224) are arranged at intervals on the lower end surface of the boss (221); A coiled pipe is arranged inside the boss (221), and the two ends of the coiled pipe are respectively connected to the two threaded pipes (224); It further includes a water tank (3), and the water tank (3) is connected to the two threaded pipes (224) through two water pipes respectively; The second platform (23) includes a second platform main body (231). A rack (234) is slidably connected to the upper end surface of the second platform main body (231). The rack (234) meshes with the gear (223). One end of the rack (234) is rotatably connected to a connecting rod (232). The other end of the connecting rod (232) is rotatably connected to an eccentric wheel (233) through a rotating connection column. Two limit columns (235) are arranged at intervals on the upper end surface of the second platform main body (231), and the limit columns (235) are used to limit the rack (234); The base (24) includes a base main body (241). A drive motor (242) and a test motor (243) are installed on the upper end surface of the base main body (241). The output end of the drive motor (242) is fixedly connected to the other end of the rotating shaft (222). The output end of the test motor (243) is fixedly connected to the eccentric wheel (233) through a rotating shaft.

2. The performance testing device for a composite coating according to claim 1, characterized in that: A plurality of groups of the grinding blocks (142) are slidably connected to the upper end surface of the mounting disk (141), and the grinding blocks (142) penetrate through the upper end surface of the mounting disk (141), and the positions of the grinding blocks (142) are adapted to the positioning tubes (143).

3. The performance testing device for a composite coating according to claim 2, characterized in that: The interior of the mounting disk (141) is hollow, and the air extractor (16) is communicated with the interior of the mounting disk (141) through an air pipe.

4. The testing method of the composite coating performance testing equipment according to any one of claims 1-3, characterized in that: During the paint wear resistance test, a certain amount of paint is sucked into the syringe (11), and then the syringe (11) is installed on the connecting pipe (13), and then a part of the paint is extruded onto the boss (221). The detection table (22) is rotated by driving the driving motor (242) to evenly spread the paint on the upper end surface of the boss (221). Then, the air pump (12) blows air through the connecting pipe (13) onto the upper end surface of the boss (221). The gas flow accelerates the drying speed of the paint. At the same time, the pressure of the gas flowing on the surface of the paint can also prevent the paint from foaming during drying. After the paint is completely dried, the grinding blocks (142) required for the test are installed on the mounting disk (141). Then, the water tank (3) is connected to the two threaded pipes (224) through two water pipes respectively. Then, the rack (234) is adjusted to be engaged with the gear (223), and the limit post (235) is used for limiting. Then, the eccentric wheel (233) is rotated by driving the test motor (243). Thus, the eccentric wheel (233) drives the rack (234) to perform a linear reciprocating motion through the connecting rod (232), and further makes the detection table (22) perform periodic forward and reverse rotations. The grinding blocks (142) will grind the paint on the surface of the boss (221). At the same time, the air extractor (16) is started to suck away the paint powder ground by the grinding blocks (142). The water inside the water tank (3) is introduced into the coil pipe inside the boss (221) through the threaded pipe (224) by the water pump to form a water flow cycle to maintain a constant temperature of the paint during grinding.

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