Thermosetting powder coating hardness detection device

Abstract

The utility model discloses a thermosetting powder coating hardness detection device which comprises a bottom plate rotationally provided with an objective table, the upper end of the bottom plate is provided with a circular groove matched with a carrier plate, two vertical rods are installed on the bottom plate, the upper ends of the two vertical rods are fixedly connected with a driving motor, and the upper ends of the two vertical rods are fixedly connected with the driving motor. A screw rod is rotatably arranged between the two vertical rods, the screw rod is fixedly sleeved with a one-way gear, the one-way gear is in tooth connection with driving teeth circumferentially arranged on the outer wall of the objective table, the screw rod is sleeved with a threaded pipe in a threaded mode, and the threaded pipe is fixedly embedded in the movable plate. According to the device, surface contact extrusion is adopted, surface extrusion can test the hardness of a coating with a larger area, dozens of or hundreds of times of detection are not needed, meanwhile, surface contact can reduce single-point hardness test errors caused by non-uniformity, impurities or tiny defects of the surface of the coating, the carrier plate is automatically driven to rotate and change positions after each time of detection, and the detection accuracy is improved. The whole process is convenient and fast.

Description

Technical Field

[0001] The utility model relates to the technical field of coating detection, and particularly relates to a hardness detection device for a thermosetting powder coating. Background Technique

[0002] It is indeed necessary to detect the hardness of the coating after the production of the thermosetting powder. This is because the coating hardness detection is to evaluate the hardness of the coating, test the ability of the coating to resist external force abrasion and shear force, and is an important parameter for evaluating the compressive capacity of the thermosetting powder material.

[0003] When our company conducts actual operations, a coating hardness detection device is used for detection, and the following problems exist in its detection:

[0004] The lower end of the detection head of its device is a conical structure, and its contact with the thermosetting powder coating (the coating is attached to the carrier plate) is point contact. The point contact extrusion only tests the hardness of a very small point on the coating, which may lead to the measurement result being insufficiently comprehensive and unable to fully reflect the overall hardness condition of the coating. Therefore, it is necessary to detect each point of the coating. Generally, dozens or even hundreds of points need to be selected for detection, which is rather troublesome and time-consuming:

[0005] During each detection, it is necessary to manually move the carrier plate for point-changing detection, making the entire detection process rather troublesome and cumbersome;

[0006] Therefore, this application provides a hardness detection device for a thermosetting powder coating to meet the requirements. Content of the Utility Model

[0007] The purpose of this application is to provide a hardness detection device for a thermosetting powder coating, which is used to solve the technical problem that the existing hardness detection process is rather troublesome and cumbersome.

[0008] To achieve the above object, the present application provides the following technical solutions: A thermosetting powder coating hardness detection device, including a bottom plate rotatably provided with a loading platform, the upper end of the loading platform is provided with a circular groove adapted to the carrier plate, two vertical rods are installed on the bottom plate, and the upper ends of the two vertical rods are fixedly connected to a driving motor. A screw rod is rotatably arranged between the two vertical rods, the upper end of the screw rod is fixedly connected to the output shaft of the driving motor, and a one-way gear is fixedly sleeved on the screw rod. The one-way gear is in tooth engagement with the driving teeth arranged circumferentially on the outer wall of the loading platform. A threaded pipe is threadedly sleeved on the screw rod, and the threaded pipe is fixedly embedded in the movable plate. The movable plate is slidably penetrated by the two vertical rods. An installation plate is fixed on the front end of the movable plate. A second magnet is fixed on the top of the installation cavity of the installation plate. A cross plate is arranged in the installation cavity of the installation plate, and a first magnet is installed on the upper end of the cross plate. The opposite ends of the first magnet and the second magnet have the same magnetic poles. A vertical plate is fixed to the lower end of the cross plate, and the vertical plate slidably penetrates the installation plate. The lower end of the vertical plate is provided with an extrusion plate with a flat bottom;

[0009] A first baffle and a second baffle are installed in the inner cavity of the one-way gear. The first baffle is fixedly installed in the inner wall cavity of the inner ring of the one-way gear. The second baffle is fixed on the screw rod, and the upper and lower ends of the second baffle are slidably connected to the inner wall of the inner ring of the one-way gear;

[0010] The driving motor is electrically connected to a PLC controller arranged on the bottom plate.

[0011] As a preferred implementation manner in this embodiment, the extrusion plate includes a first plate body in the middle and second plate bodies on both sides of the first plate body. The first plate body is fixedly installed with the vertical plate, and the two second plate bodies are detachably installed with the vertical plate.

[0012] As a preferred implementation manner in this embodiment, I-shaped cavities are arranged on both side walls of the vertical plate. T-shaped chutes are arranged on the outer walls of the two second plate bodies, and two T-shaped sliders are slidably arranged in the T-shaped chutes. The two T-shaped sliders are fixedly connected to corresponding external hand-held blocks, and the two hand-held blocks are respectively fixedly connected to the outer wall of the vertical plate through springs. An activity cavity adapted to the second plate body is arranged in the inner cavity of the vertical plate.

[0013] As a preferred implementation manner in this embodiment, a blanking opening is arranged on the circular groove.

[0014] In summary, the technical effects and advantages of the present utility model:

[0015] The structure of the utility model is reasonable. The device adopts surface contact extrusion. Surface extrusion can test the hardness of a larger area of the coating, which can better reflect the overall hardness of the coating, rather than being limited to the hardness of a single point and without the need for dozens or hundreds of detections. At the same time, surface contact can reduce the single-point hardness test error caused by the unevenness, impurities or micro-defects on the coating surface. After each detection, it automatically drives the carrier board to rotate and change positions, without manual operation, making the whole process convenient and fast.

[0016] In the utility model, the width of the adjustable extrusion plate can be adjusted, thereby changing the contact area with the coating to adapt to the properties, thickness of the coating material and the required test accuracy. At the same time, the overall weight of the vertical plate remains unchanged, so that the extrusion force acting on the coating remains unchanged, which is beneficial to improving the detection accuracy. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is Figure 1 a schematic diagram of the partial split structure in

[0020] Figure 3 It is Figure 1 a schematic diagram of the mounting plate structure in

[0021] Figure 4 It is Figure 3 a schematic diagram of the bottom view of the mounting plate in

[0022] Figure 5 It is Figure 3 a schematic diagram of the partial enlarged structure in

[0023] Figure 6 It is Figure 1 a schematic diagram of the partial sectional structure of the one-way gear in

[0024] In the figure: 1. Bottom plate; 2. Carrying platform; 3. Driving gear; 4. Driving motor; 5. Vertical rod; 6. Movable plate; 7. Screw rod; 8. One-way gear; 81. First baffle; 82. Second baffle; 9. Threaded pipe; 10. Mounting plate; 11. Horizontal plate; 12. First magnet; 13. Vertical plate; 14. Extrusion plate; 141. First plate body; 142. Second plate body; 143. Hand-squeezing block; 144. T-shaped slider; 145. I-shaped cavity; 146. Spring; 15. Second magnet; 16. Material discharging opening. Specific implementation mode

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment: Refer to Figures 1-6 A thermosetting powder coating hardness detection device shown in the figure, including a bottom plate 1 rotatably provided with a carrying platform 2. The upper end of the carrying platform 1 is provided with a circular groove adapted to the carrier plate. Two vertical rods 5 are installed on the bottom plate 1, and the upper ends of the two vertical rods 5 are fixedly connected to the driving motor 4. A screw rod 7 is rotatably arranged between the two vertical rods 5. The upper end of the screw rod 7 is fixedly connected to the output shaft of the driving motor 4, and a one-way gear 8 is fixedly sleeved on the screw rod 7. The one-way gear 8 is in tooth engagement with the driving teeth 3 arranged in a circle on the outer wall of the carrying platform 2. A threaded pipe 9 is threadedly sleeved on the screw rod 7, and the threaded pipe 9 is fixedly embedded in the movable plate 6. The movable plate 6 is slidably penetrated by the two vertical rods 5. An installation plate 10 is fixed on the front end of the movable plate 6. A second magnet 15 is fixed on the top of the installation cavity of the installation plate 10. A horizontal plate 11 is arranged in the installation cavity of the installation plate 10, and a first magnet 12 is installed on the upper end of the horizontal plate 11. The opposite ends of the first magnet 12 and the second magnet 15 have the same magnetic poles. A vertical plate 13 is fixed to the lower end of the horizontal plate 11, and the vertical plate 13 slidably penetrates the installation plate 10. The lower end of the vertical plate 13 is provided with an extrusion plate 14 with a flat bottom;

[0027] A first baffle 81 and a second baffle 82 are installed in the inner cavity of the one-way gear 8. The first baffle 81 is fixedly installed in the inner wall cavity of the inner ring of the one-way gear 8. The second baffle 82 is fixed on the screw rod 7, and the upper and lower ends of the second baffle 82 are slidably connected to the inner wall of the inner ring of the one-way gear 8;

[0028] The driving motor 4 is electrically connected to a PLC controller arranged on the bottom plate 1.

[0029] During use, place the carrier plate with a thermosetting powder coating of a certain thickness in the circular groove, with the coated end facing upward. During operation, control the rotation of the drive motor 4, and the screw 7 rotates. The threaded tube 9 drives the mounting plate 10 to move downward (at this time, the second baffle 82 provided on the screw 7 rotates and contacts the first baffle 81, but the one-way gear 8 cannot drive the stage 2 to rotate). When the lower end of the pressing plate 14 contacts the upper surface of the coating, the mounting plate 10 continues to move downward by a distance L1. At this time, the distance between the two magnets changes, and the repulsive force generated between the two magnets (the magnitude of this repulsive force is the standard pressure that a qualified coating can withstand) acts to cause the lower end of the pressing plate 14 to press on the coating. After the pressing is completed, the drive motor 4 rotates in the reverse direction. When rotating in the reverse direction, the mounting plate 10 moves upward under the drive of the threaded tube 9, and at this time, the second contact plate 82 moves in the reverse direction. When the mounting plate 10 pushes the cross plate 11 upward and moves a short distance (that is, the upper end of the pressing plate 14 contacts and separates from the upper end of the coating), at this time, the reversely moving second baffle 82 contacts the first baffle 81, and the one-way gear 8 drives the stage 2 to rotate. When the mounting plate 10 stops moving upward (that is, when it moves to the initial position), the rotation of the stage 2 stops. At this time, the position of the pressing point of the coating changes. The drive motor 4 rotates forward, and the mounting plate 10 moves downward, causing the pressing plate 14 to press on the coating (after the pressing is completed, it can be observed whether an indentation is generated. If an indentation is generated, it proves that this coating is unqualified). Repeating this process can perform multiple point-changing detections on the coating. Usually, 4 to 8 point-changing detections are required. Since surface contact pressing is adopted, surface pressing can test the hardness of a larger area of the coating, can better reflect the overall hardness condition of the coating, rather than being limited to the hardness of a small point and without the need for dozens or hundreds of detections. At the same time, surface contact can reduce the single-point hardness test error caused by the unevenness, impurities or micro-defects on the coating surface. After each detection, it automatically drives the carrier plate to rotate and change positions without manual operation, making the whole process convenient and fast.

[0030] It should be noted that: First, the device can also set the distance of L1 according to the control of the PLC controller, and can control the distance of L1 to increase continuously during each position change detection as needed, so as to detect the ultimate pressure that the coating can withstand; Second, L1 should not be too large, otherwise it is easy for the stage 2 to rotate relative to the extrusion plate 14 when the extrusion plate 14 contacts the coating and the mounting plate 10 moves upward, which is likely to cause scratching on the surface of the coating. To avoid this situation, when the mounting plate 10 makes an upward movement, after the mounting plate 10 drives the cross plate 11 to move upward, that is, after the lower end of the extrusion plate 14 contacts and separates from the coating, the second baffle 82 contacts the first baffle 81 to rotate the stage 2; Third, the first magnet 12 and the second magnet 15 can be magnets, electromagnets, or a combination of both; Fourth, the cooperation of the one-way gear 8 and the driving tooth 3 makes the power source of the driving motor 4 the same as the power source for the rotation of the screw 7, reducing the number of power sources, that is, the number of driving motors 4, which can reduce costs and the maintenance frequency of the equipment; Fifth, balls can be provided at the upper and lower ends of the second baffle 82 to reduce the friction with the one-way gear.

[0031] As a preferred implementation manner in this embodiment, as Figure 4 shown, the extrusion plate 14 includes a first plate body 141 located in the middle and second plate bodies 142 located on both sides of the first plate body 141. The first plate body 141 is fixedly installed with the vertical plate 13, and the two second plate bodies 142 are detachably installed with the vertical plate 13.

[0032] The extrusion plate 14 is composed of a first plate body 141 and two second plate bodies 142. According to needs, the width of the extrusion plate 14 is adjusted (one or two second plate bodies 142 are removed), and then the contact area with the coating is changed (the adjustable contact area allows the tester to select an appropriate contact area according to the properties, thickness of the coating material, and the required test accuracy, which enables the surface contact extrusion method to adapt to different types of coating materials, whether thin coatings or thick coatings, and can effectively conduct tests).

[0033] As a preferred implementation manner in this embodiment, as Figure 4 shown, I-shaped cavities 145 are provided on both side walls of the vertical plate 13. T-shaped chutes are provided on the outer walls of the two second plate bodies 142, and two T-shaped sliders 144 are slidably arranged in the T-shaped chutes. The two T-shaped sliders 144 are fixedly connected to corresponding external hand-held blocks 143, and the two hand-held blocks 143 are respectively fixedly connected to the outer wall of the vertical plate 13 through springs 146. An activity cavity adapted to the second plate body 142 is arranged in the inner cavity of the vertical plate 13.

[0034] When adjusting the contact area of the extrusion plate 14, pinch the two hand-holding blocks 143 with fingers and make the two hand-holding blocks 143 move relatively to compress the spring 146. After the hand-holding block 143 moves out of the lower bayonet of the I-shaped cavity 145, move the second plate body 142 upward. After moving in place, release the fingers. Under the elastic force of the spring 146, the hand-holding block 143 moves into the upper bayonet. When pressing down, the lower end of the second plate body 142 will not come into contact with the coating. At the same time, since the weight of the second plate body 142 still acts on the vertical plate 13, after the adjustment is completed, the overall weight of the vertical plate 13 remains unchanged, and thus the extrusion force acting on the coating remains unchanged, which is beneficial to improving the detection accuracy.

[0035] As a preferred implementation manner in this embodiment, as Figure 1 shown, a blanking opening 16 is provided on the circular groove.

[0036] The operator can insert the hand into the blanking opening 16 to facilitate the fingers to support the bottom of the carrier plate, and then it is convenient to remove the carrier plate from the circular groove.

[0037] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A thermosetting powder coating hardness detection device, characterized in that: It includes a bottom plate (1) with a rotatable loading platform (2). A circular groove adapted to the carrier plate is provided at the upper end of the loading platform (2). Two vertical rods (5) are installed on the bottom plate (1), and the upper ends of the two vertical rods (5) are fixedly connected to a driving motor (4). A screw rod (7) is arranged between the two vertical rods (5), and the upper end of the screw rod (7) is fixedly connected to the output shaft of the driving motor (4). A one-way gear (8) is fixedly sleeved on the screw rod (7), and the one-way gear (8) is in tooth engagement with driving teeth (3) arranged in a circle on the outer wall of the loading platform (2). A threaded tube (9) is threadedly sleeved on the screw rod (7), and the threaded tube (9) is fixedly embedded in a movable plate (6). The movable plate (6) is slidably penetrated by the two vertical rods (5). An installation plate (10) is fixed at the front end of the movable plate (6). A second magnet (15) is fixed at the top of the installation cavity of the installation plate (10). A cross plate (11) is arranged in the installation cavity of the installation plate (10), and a first magnet (12) is installed at the upper end of the cross plate (11). The opposite ends of the first magnet (12) and the second magnet (15) have the same magnetic poles. A vertical plate (13) is fixed at the lower end of the cross plate (11), and the vertical plate (13) slidably penetrates the installation plate (10). An extrusion plate (14) with a flat bottom is arranged at the lower end of the vertical plate (13). A first baffle (81) and a second baffle (82) are installed in the inner cavity of the one-way gear (8). The first baffle (81) is fixedly installed in the inner wall cavity of the inner ring of the one-way gear (8). The second baffle (82) is fixed on the screw rod (7), and the upper and lower ends of the second baffle (82) are slidably connected to the inner wall of the inner ring of the one-way gear (8). The driving motor (4) is electrically connected to a PLC controller arranged on the bottom plate (1).

2. The hardness detection device for a thermosetting powder coating according to claim 1, characterized in that: The extrusion plate (14) includes a first plate body (141) in the middle and second plate bodies (142) on both sides of the first plate body (141). The first plate body (141) is fixedly installed with the vertical plate (13), and the two second plate bodies (142) are detachably installed with the vertical plate (13).

3. The hardness detection device for a thermosetting powder coating according to claim 2, characterized in that: I-shaped cavities (145) are arranged on both side walls of the vertical plate (13). T-shaped sliding grooves are arranged on the outer walls of the two second plate bodies (142), and two T-shaped sliding blocks (144) are slidably arranged in the T-shaped sliding grooves. The two T-shaped sliding blocks (144) are fixedly connected to corresponding external hand-held blocks (143), and the two hand-held blocks (143) are respectively fixedly connected to the outer wall of the vertical plate (13) through springs (146). An activity cavity adapted to the second plate body (142) is arranged in the inner cavity of the vertical plate (13).

4. The hardness detection device for a thermosetting powder coating according to claim 3, characterized in that: A blanking opening (16) is arranged on the circular groove.

Images