Test board for testing sand falling rate of real stone paint

Abstract

The utility model relates to a test board for testing the sand falling rate of real stone paint. The test board comprises a spraying loss receiving area and a spraying area, the spraying area is located in the middle of the test board, and the spraying loss receiving area surrounds the periphery of the spraying area; and the test plate is a PVC expansion plate. The spraying area and the spraying loss receiving area are arranged on the plate surface of the test plate, and the PVC expansion plate is selected as a test base material, so that the accuracy and repeatability of the sand falling rate test are remarkably improved. The test board can accurately test the sand falling rate of the real stone paint, is simple and convenient to operate, is green and environment-friendly, can truly reflect the sand falling performance of the real stone paint, and provides a reliable test means for coating construction and quality control.

Description

Technical Field

[0001] The utility model relates to the field of building coating testing, in particular to a testing board for testing the sand loss rate of real stone paint. Background Art

[0002] In the field of architectural coatings, natural stone paint, a decorative coating that simulates the texture of natural stone, is widely used for exterior building decoration due to its aesthetic and durable properties. However, with the widespread use of natural stone paint, the issue of "sand loss rate" in its application performance has gradually attracted attention. The sand loss rate refers to the ratio of the amount of sand that bounces back during the spraying process to the total amount of paint sprayed. An increase in the sand loss rate increases the total paint consumption per square meter, which not only increases costs for users, but also causes pollution when the bounced sand falls on the construction site.

[0003] Despite the increasing importance of sand loss rate, there are currently no unified standards and specifications for sand loss rate testing. Existing testing methods have numerous shortcomings, making it difficult to guarantee the accuracy and reliability of test results. This not only limits the accurate evaluation of true stone paint performance but also hinders in-depth research on the factors affecting sand loss rate and the improvement of related technologies.

[0004] Currently, there are two common testing methods:

[0005] 1. Falling sand method: This method involves laying a plastic film at the bottom of the spraying area and weighing the sand on the film before and after spraying to calculate the amount of sand that bounces back. However, this method has obvious drawbacks:

[0006] First, the sand that bounces back onto the body and other areas cannot be caught completely, resulting in some sand being lost.

[0007] Secondly, when spraying the bottom area, some of the sprayed paint will fall onto the film, increasing the error.

[0008] The combined influence of these factors greatly reduces the accuracy and repeatability of the experimental results.

[0009] 2. Ordinary weight loss method: This method calculates the amount of sand that bounces back by weighing the weight difference between the plate before and after spraying. Although this method is simple to operate, it also has problems:

[0010] For example, when full spraying occurs (especially during the spraying of real stone paint, the discharge port of the spray gun scatters the paint in a circular pattern onto the board surface, and when spraying the edge of the board, there will be spray losses outside the board surface), the losses outside the board surface are also mistakenly counted as sand loss, resulting in higher data. The test results are more arbitrary and lack standardization, making it difficult to serve as a reliable reference.

[0011] Although the above two conventional methods are simple to operate, they have a high error rate and cannot truly test the difference in product sand drop rate.

[0012] Related patent applications, such as CN115773960A, which describes a device and method for measuring the sand loss rate of real stone paint, require specialized equipment that is difficult to manufacture, complex to operate, and prone to errors. These limitations make this method difficult to promote in practical applications.

[0013] Given the limitations of existing methods, a simple, highly accurate sand drop rate testing method is urgently needed. This new method should be able to accurately reflect the differences in sand drop rates among different natural stone paint products, providing a reliable reference for further exploring the factors affecting sand drop rates and for analyzing and improving them. This will not only help improve the application performance of natural stone paint but also promote the advancement and innovation of related technologies. Utility Model Content

[0014] The purpose of the present invention is to solve the aforementioned problems and provide a test plate for testing the sand drop rate of real stone paint. By setting a spraying area and a spray loss receiving area on the surface of the test plate, the accuracy and repeatability of the sand drop rate test are significantly improved. A chevron board is selected as the test substrate to achieve multiple repeated tests. The test method for the sand drop rate of real stone paint using the present invention is not only simple to operate, reduces material consumption, conforms to the concept of green environmental protection, and saves costs; it also improves the efficiency of the test, can truly reflect the sand drop performance of the real stone paint, and provides a reliable testing method for paint construction and quality control.

[0015] In order to solve the above problems, the present invention is implemented through the following technical solutions:

[0016] A test plate for testing the sand loss rate of real stone paint, the test plate comprising a spray loss receiving area and a spraying area;

[0017] The spraying area is located in the middle of the test plate, and the spraying loss receiving area surrounds the periphery of the spraying area;

[0018] The test board is a Chevron board.

[0019] The test plate for testing the sand loss rate of real stone paint described in the present invention is further optimized as follows:

[0020] The size of the spray loss receiving area on the test plate is designed to ensure that when the spraying operation is performed in the spraying area, the spray loss sprayed outside the spraying area falls into the spray loss receiving area.

[0021] The test plate for testing the sand loss rate of real stone paint described in the present invention is further optimized as follows:

[0022] The test plate is a square plate with a size of 120 to 140 cm in length and 100 cm in width;

[0023] In the longitudinal direction, contour lines are set 35 cm away from the upper and lower ends, and in the transverse direction, 30 cm away from the left and right ends. The four contour lines form a closed spraying area in the middle position, and the periphery of the spraying area is the spraying loss receiving area.

[0024] The test plate for testing the sand loss rate of real stone paint described in the present invention is further optimized as follows:

[0025] The test distance between the test plate and the spraying equipment (such as a spray gun, etc.) is 50 cm.

[0026] The core of this technical solution is to significantly improve the accuracy, repeatability and environmental friendliness of sand drop rate testing through innovative design and material selection. Specific improvements are as follows:

[0027] 1. Design of the spraying loss receiving area: A spraying loss receiving area is specially designed on the spraying board surface, and the data is more accurate when the weight loss method is used to calculate the amount of sand falling. This design not only improves the reliability of the test results, but also ensures the repeatability and standardization of the experiment. For example, during the spraying process of real stone paint, the discharge port of the spray gun scatters circular radiation onto the board surface when spraying the paint. After multiple measurements, when spraying at a distance of 50 cm from the board surface, the radius of the scattered circular area of ​​the sprayed real stone paint is 25 cm. The utility model draws a wireframe of corresponding size in the middle of the test board at a distance from the surrounding edges. The sprayer sprays within the wireframe area. Then, during the spraying process, the paint sprayed from the spray gun will not be sprayed into the air outside the board surface. In this way, the difference calculated by the weight loss method can only be the real data of the sand being bounced out during the spraying process.

[0028] 2. Use of weighable plates: This technical solution uses weighable plates for testing. The amount of sand loss can be calculated through simple weighing, greatly improving the convenience and efficiency of the test. This design simplifies the testing process, making the operation faster and easier to implement.

[0029] 3. Use of Chevron Board: To further optimize the testing process, this technical solution specifically uses Chevron board as the test substrate. Chevron board is a lightweight, durable material ideal for coatings testing. After the test is completed, the paint can be easily scraped off, allowing for repeated testing. This design not only improves testing efficiency but also reduces material consumption, aligning with environmental protection principles and saving costs.

[0030] In the present invention, since the sand falling rate test data is obtained after the spraying is completed, there is no need to observe the film forming effect, and the board is a Chevron board, the paint on the board can be scraped off after the spraying is completed, and the board surface can be wiped clean with a rag, so that the test board can be reused to continue testing.

[0031] In summary, this technical solution significantly improves the accuracy and repeatability of sand drop rate testing by dividing the spraying area and the spray loss receiving area on the spraying surface of the test plate, and using weighable plates and chevron plates as test materials. This method is not only simple to operate and environmentally friendly, but also can accurately reflect the sand drop performance of real stone paint, providing a reliable testing method for coating application and quality control. Through these innovative designs, this technical solution not only improves the scientific and practical nature of the test, but also provides a more efficient and environmentally friendly testing solution for the coatings industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the overall structure of a test board for testing the sand loss rate of real stone paint in the present invention.

[0033] Description of the accompanying drawings:

[0034] 1-Chevron plate, 2-Spraying area, 3-Spraying loss receiving area. DETAILED DESCRIPTION

[0035] To make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. Any simple improvements to the present invention based on the concepts of the present invention fall within the scope of protection of the present invention.

[0036] Example 1

[0037] A method for testing the sand loss rate of real stone paint using a test plate of the utility model comprises the following testing steps:

[0038] 1. Selection and preparation of boards:

[0039] Select a large, weighable piece of Chevron board 1 with dimensions of 140 cm in length and 100 cm in width. Draw a line 35 cm from the top and bottom edges of the board; draw a line 30 cm from the left and right edges. The area enclosed by these four lines is the spraying area 2. The area outside the four sides of the spraying area 2 is the spraying loss receiving area 3. For details, see the attached Figure 1 ;

[0040] 2. Weighing preparation before spraying:

[0041] Before spraying, first weigh the weight of the snowflake board 1, record it as M1; put the real stone paint into the spray gun, and weigh the total weight of the spray gun and the sample paint in the spray gun, record it as M2;

[0042] 3. Spraying operation:

[0043] Spray at a distance of 50 cm from the Chevron board, ensuring that the spray evenly covers the spray area 2;

[0044] 4. Weighing and calculation after spraying:

[0045] After spraying, weigh the sprayed Chevron board 1, which is recorded as M3; at the same time, weigh the total weight of the spray gun and the remaining sample paint in the spray gun, which is recorded as M4.

[0046] Calculated according to the following formula:

[0047] Sand loss M5 = (M2-M4)-(M3-M1);

[0048] Sand loss rate w = M5 / (M2-M4)×100%.

[0049] The size of the spray loss receiving area 3 on the test plate is designed to ensure that when the spraying operation is performed in the spraying area 2, the spray loss sprayed outside the spraying area 2 falls into the spray loss receiving area 3.

[0050] The test distance between the test plate and the spraying equipment is 50 cm.

[0051] Table 1 Data reliability test - reproducibility test of different test methods

[0052]

[0053] According to the test results in Table 1, when the same paint sample is tested repeatedly using different sand loss rate test methods, the sand loss rate data of the upgraded weight loss method used in the present invention is the most stable and has the best reproducibility.

[0054] When testing the sand drop rate using the common weight loss method, the sand drop rate for the real stone paint sample was 20.8% in the first test and 25.5% in the repeated test. When spraying the edge of the plate, paint was scattered outside the plate. The sand drop amount obtained using the common weight loss method (total amount of sprayed paint minus the weight of the paint on the plate) includes not only the weight of the sand that bounced back, but also the paint sprayed onto the outside of the plate surface. Therefore, the overall sand drop rate is high. Due to the different losses when spraying the edge, the final sand drop amount is also different, resulting in a large error in the sand drop rate and a large difference in the repeated test data.

[0055] The falling sand catching method involves laying a large area of ​​plastic film at the bottom of the spraying area, and weighing the weight of the sand on the film before and after spraying to obtain the amount of sand that bounces back. Disadvantages: The sand that bounces back to the body and other areas cannot be completely caught. When spraying the bottom area, some of the sprayed paint (not the sand caused by rebound) will fall onto the film. The above will cause errors, resulting in inaccurate experimental results and large repeatability errors.

[0056] After setting up a spray loss receiving area according to the upgraded weight reduction method of the present invention and testing the sand drop rate, the sand drop rate of the real stone paint sample was 10.2% in the first test, and 10.5% in the repeated test. Since only the area within the painted wireframe is sprayed during spraying, the part of the paint sprayed beyond the wireframe will still remain on the board surface. Therefore, the sand drop amount obtained by the weight reduction method (total amount of sprayed paint minus the weight of the paint on the board) is only the weight of the sand rebounded during the spraying process. Since there is no influence of spray paint loss, the error of the sand drop rate is almost zero, and the data is relatively stable after repeated testing.

[0057] In summary, the above are only preferred examples of the present invention and do not limit the present invention in any way. Any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the disclosed technical content shall be regarded as equivalent examples of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

[0058] The expressions of the positions involved in the technical solution of the present invention, such as up, down, left, right, etc., are only for the purpose of clearly describing the corresponding structural connection methods, and are not intended to limit the specific actual positions of the present technical solution. When the structures, connection methods and principles are the same or similar, they still fall within the scope of protection of the technical solution of the present invention.

[0059] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] Unless otherwise stated, the various optimization technical solutions in the present invention can be combined with each other.

[0061] Unless otherwise defined, all professional and scientific terms used herein have the same meaning as those familiar to those skilled in the art. In addition, any methods and materials similar or equivalent to those described herein may be applied to the present invention.

Claims

1. A test plate for testing the sand loss rate of real stone paint, characterized by: The test plate includes a spray loss receiving area and a spraying area; The spraying area is located in the middle of the test plate, and the spraying loss receiving area surrounds the periphery of the spraying area; The test board is a Chevron board.

2. The test plate for testing the sand loss rate of real stone paint according to claim 1, characterized in that: The size of the spray loss receiving area on the test plate is designed to ensure that when the spraying operation is performed in the spraying area, the spray loss sprayed outside the spraying area falls into the spray loss receiving area.

3. The test plate for testing the sand loss rate of real stone paint according to claim 1, characterized in that: The test plate is a square plate with a size of 120 to 140 cm in length and 100 cm in width; In the longitudinal direction, contour lines are set 35 cm away from the upper and lower ends, and in the transverse direction, 30 cm away from the left and right ends. The four contour lines form a closed spraying area in the middle position, and the periphery of the spraying area is the spraying loss receiving area.

4. The test plate for testing the sand loss rate of real stone paint according to claim 3, characterized in that: The test distance between the test plate and the spraying equipment is 50 cm.

Images