Device for measuring drying speed of coating film under controllable humidity

Abstract

The utility model discloses a device for measuring the drying speed of a coating film under controllable humidity, which comprises an electronic balance body and a frame body, the frame body comprises a framework and a front side plate, a top plate, a rear side plate, a left side plate and a right side plate which are arranged on the framework, and the front side plate and the top plate are respectively arranged on the front side and the top of the framework in a sliding mode. A humidity testing device is installed in the frame body through a supporting mechanism, a humidifier is arranged on one side of the frame body, the humidifier is connected with a mist distribution mechanism arranged in the frame body through a guide pipe, and the electronic balance body is further connected with a timer. The device is suitable for accurately measuring the drying speed and time of a coating film under different humidity, the humidity in the frame body is adjusted through the humidifier, the volatilization mass of a solvent or moisture in the coating film is weighed through the electronic balance body, the drying time of the coating film is measured through the timer, and the drying speed and time of the coating film are accurately measured through the volatilization mass of the solvent or moisture in the coating film under the set humidity. And regularly recording the volatilization rate of the solvent from the coating, and finally determining the drying time of the coating.

Description

Technical Field

[0001] This utility model belongs to the field of coating testing equipment, specifically relating to a device for measuring the drying speed of a coating film under controllable humidity. Background Technology

[0002] After coating application, the surface of the coated object undergoes curing and drying. Due to various factors such as temperature, humidity, dilution ratio, product type, and film thickness, the surface drying speed of the coating cannot be accurately measured. This is especially true under varying humidity levels, which can affect the application of the coating and the final film's performance. Currently, the testing methods for coating surface drying include the cotton ball method and the finger touch method. The finger touch method is widely used in the coating industry, especially during on-site application. However, this method requires multiple measurements to obtain a precise drying time, consuming a significant amount of time and effort.

[0003] Currently, existing methods for measuring coating drying speed involve continuous testing under relatively constant humidity conditions using instruments or fixed methods until the coating is completely dry. If drying data for coatings under varying humidity levels is required, it can only be obtained by spraying water or using dehumidifiers indoors. This method is difficult to operate, produces unstable data, and requires a significant amount of time and effort. The closer to the point of drying, the more frequent the testing becomes; if there are few test panels and the tests are conducted at the same location, the greater the deviation in the measured results. Utility Model Content

[0004] The present invention aims to provide a device for measuring the drying speed of a coating film under controllable humidity, which can meet the requirements for measuring the drying speed and time of the coating film under different humidity conditions, thereby solving the problem that it is difficult to accurately measure the drying speed of coatings under different humidity conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a device for measuring the drying speed of a coating under controllable humidity, including an electronic balance body and a frame. The frame includes a frame and a front side plate, a top plate, a rear side plate, a left side plate and a right side plate disposed on the frame. The front side plate and the top plate are slidably installed on the front side and the top of the frame, respectively. A humidity testing device is installed in the frame through a support mechanism. A humidifier is disposed on one side of the frame. The humidifier is connected to a mist distribution mechanism disposed in the frame through a conduit.

[0007] Furthermore, the front side plate can slide vertically within the front side groove of the frame for placing and removing the test plate, and a first protrusion is provided on the upper part of the front side plate.

[0008] Furthermore, the top plate can slide horizontally within a groove at the top of the frame, and when opened, it is used to reduce the humidity inside the frame in a timely manner. A second protrusion is provided on the top plate.

[0009] Furthermore, the support mechanism includes a support base and a support rod, with both ends of the support rod placed on two symmetrically arranged support bases, and a humidity testing device installed in the middle of the support rod.

[0010] Preferably, the support base is in multiple pairs, and the multiple pairs of support bases are arranged vertically at equal intervals.

[0011] Preferably, the humidity testing device is an electronic thermometer and hygrometer of model MOSEKO TL8048.

[0012] Furthermore, the mist distribution mechanism includes an annular mist pipe, which is installed in the frame through symmetrically arranged clamps, and several spray nozzles are evenly arranged at the bottom of the annular mist pipe in a circumferential direction.

[0013] Furthermore, the electronic balance body is also connected to a timer.

[0014] Furthermore, the front panel, top panel, rear panel, left panel, and right panel are all made of transparent glass.

[0015] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0016] 1. This utility model's controllable humidity coating drying rate measuring device is suitable for accurately measuring the drying rate and time of coatings under different humidity levels. The humidity in the frame is adjusted by a humidifier, the evaporation mass of solvent or water in the coating is weighed using an electronic balance, and the drying time of the coating is precisely measured using a timer. Under the set humidity, the evaporation rate of the solvent from the coating is recorded periodically based on the evaporation mass of solvent or water in the coating, ultimately determining the drying time of the coating. This allows for understanding the evaporation rate of different solvents in the coating product under different humidity levels, and for tracking and recording the physical changes during the coating drying process under different humidity levels, greatly improving the accuracy of the experimental data.

[0017] 2. The device for measuring the drying speed of a coating under controllable humidity of this invention reduces the time and effort spent by experimental personnel on coating drying, freeing their hands from complicated testing, improving experimental efficiency, better aligning with the actual application scenarios of coatings, accumulating experimental data, accurately guiding on-site construction, and improving coating quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a device for measuring the drying speed of a coating film under controllable humidity according to the present invention.

[0019] Figure 2 This is the coating drying curve in the test example of this utility model;

[0020] Reference numerals: 1-Electronic balance body, 2-Frame, 3-Front side plate, 301-First protrusion, 4-Top plate, 402-Second protrusion, 5-Support base, 6-Support rod, 7-Humidity testing device, 8-Humidifier, 9-Annular mist tube, 10-Spray nozzle, 11-Clamping base, 12-Timer. Detailed Implementation

[0021] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0022] Example 1

[0023] like Figure 1 As shown in the figure, this embodiment provides a device for measuring the drying speed of a coating under controllable humidity, including an electronic balance body 1 and a frame 2. The frame 2 includes a frame and a front side plate 3, a top plate 4, a rear side plate, a left side plate, and a right side plate disposed on the frame. The front side plate 3 and the top plate 4 are slidably installed on the front side and the top of the frame, respectively. A humidity testing device 7 is installed in the frame 2 through a support mechanism. A humidifier 8 is disposed on one side of the frame 2. The humidifier 8 is connected to a mist distribution mechanism disposed in the frame 2 through a conduit.

[0024] Specifically, the front panel 3 can slide vertically in the front sliding groove of the frame for placing and taking out the test plate. The upper part of the front panel 3 is provided with a first protrusion 301, which facilitates the experimenter to push and pull the front panel 3 to place and take out the test plate. The top panel 4 can slide horizontally in the top sliding groove of the frame. When opened, it is used to reduce the humidity inside the frame 2 in time. The top panel 4 is provided with a second protrusion 402, which facilitates the experimenter to push and pull the top panel 4.

[0025] Specifically, the support mechanism includes support bases 5 and support rods 6. The two ends of the support rods 6 are placed on two symmetrically arranged support bases 5, and a humidity testing device 7 is installed in the middle of the support rods 6. There are multiple pairs of support bases 5, which are vertically and equidistantly arranged. By selecting support bases 5 at different heights to place the support rods 6, the humidity testing device 7 can be placed at different heights.

[0026] In this embodiment, there are four pairs of support bases 5, and the humidity testing device 7 is an electronic thermometer and hygrometer of model MOSEKO TL8048. The electronic thermometer and hygrometer can be fixed to the support rod 6 by adhesive.

[0027] Specifically, the mist distribution mechanism includes an annular mist pipe 9, which is installed in the frame 2 via symmetrically arranged clamping seats 11. Several spray nozzles 10 are evenly arranged circumferentially at the bottom of the annular mist pipe 9. The mist distribution mechanism promptly and evenly distributes the mist sprayed from the humidifier 8 within the frame 2.

[0028] Specifically, the electronic balance body 1 is also connected to a timer 12. The timer 12 accurately records the drying time of the coating. In this embodiment, the front side plate 3, top plate 4, rear side plate, left side plate, and right side plate are all made of transparent glass. The electronic balance body 1 in this embodiment can be a Mettler Toledo MS series electronic balance, which has a built-in USB interface. The timer 12 can be a commercially available product with a USB interface, such as LISSA or Baseus.

[0029] Test case

[0030] The drying speed of the coating film was determined using the apparatus described in Example 1. A water-based epoxy ester primer was sprayed onto the test panel. The test panel weighed 10.51g, and its mass after spraying was 13.12g. The humidity inside the frame 2 was humidified using a humidifier 8 and adjusted to 40%RH. The test panel was then placed inside, and a timer 12 was set to record the data every 0.01g decrease in weight until no change occurred within 300s, which was considered the test endpoint. The test results are shown in Table 1.

[0031] Table 1 Coating drying timetable

[0032] Time / min Coating weight / g Time / min Coating weight / g 1 13.12 16 11.82 2 12.86 17 11.80 3 12.70 18 11.77 4 12.56 19 11.75 5 12.46 20 11.73 6 12.37 21 11.72 7 12.28 22 11.72 8 12.19 23 11.71 9 12.11 24 11.70 10 12.07 25 11.70 11 12.01 26 11.69 12 11.95 27 11.69 13 11.91 28 11.69 14 11.88 29 11.69 15 11.85 30 11.69

[0033] The coating drying curve is generated by summarizing the data in Table 1, as follows: Figure 2 As shown.

[0034] Experimental results: In an environment with a humidity of 40%RH, the water-based epoxy ester primer film showed a relatively fast evaporation rate in the early stage, but the weight change of the film decreased significantly after 15 minutes, and the film reached surface dryness after 26 minutes.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the technical solution and concept of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring the drying rate of a coating film under controllable humidity, comprising an electronic balance body and a frame, wherein the frame includes a frame and a front side plate, a top plate, a rear side plate, a left side plate, and a right side plate disposed on the frame, the front side plate and the top plate being slidably mounted on the front side and top of the frame, respectively, characterized in that: A humidity testing device is installed inside the frame via a support mechanism. A humidifier is installed on one side of the frame, and the humidifier is connected to a mist distribution mechanism inside the frame via a conduit.

2. The device for measuring the drying speed of a coating film under controllable humidity according to claim 1, characterized in that: The front panel can slide vertically within the front groove of the frame for placing and removing test plates, and a first protrusion is provided on the upper part of the front panel; the top panel can slide horizontally within the top groove of the frame, and is used to reduce the humidity inside the frame in time when opened, and a second protrusion is provided on the top panel.

3. The device for measuring the drying speed of a coating film under controllable humidity according to claim 1, characterized in that: The support mechanism includes a support base and a support rod. The two ends of the support rod are placed on two symmetrically arranged support bases, and a humidity testing device is installed in the middle of the support rod.

4. The device for measuring the drying speed of a coating film under controllable humidity according to claim 3, characterized in that: The support base consists of multiple pairs, which are vertically and equidistantly arranged.

5. The device for measuring the drying speed of a coating film under controllable humidity according to claim 1, characterized in that: The mist distribution mechanism includes an annular mist pipe, which is installed in the frame through symmetrically arranged clamps. Several spray nozzles are evenly arranged on the bottom of the annular mist pipe in a circumferential direction.

6. The device for measuring the drying speed of a coating film under controllable humidity according to claim 1, characterized in that: The electronic balance body is also connected to a timer.

7. The device for measuring the drying speed of a coating film under controllable humidity according to claim 1, characterized in that: The front panel, top panel, rear panel, left panel, and right panel are all made of transparent glass.

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