Spraying equipment for thermosetting powder coating

Abstract

The utility model provides spraying equipment for thermosetting powder coating. The spraying equipment comprises a powder supply box, a powder supply pipe and a spray gun which are connected in sequence, the powder supply box comprises a box body, a guide plate and a filtering mechanism. The guide plate is slidably arranged at the bottom end in the box body, and the guide direction faces the end part of the powder supply pipe; the filtering mechanism comprises a supporting plate, a filtering net, a shielding part and a driving part; the supporting plate is located above the guide plate and fixedly connected with the inner wall of the box body, and the interior of the box body is divided into a filtering cavity and a powder supply cavity. The filter screen is horizontally and slidably arranged in the supporting plate; grooves for accommodating the end part of the filter screen are formed in the inner wall of the box body and the inner side of the supporting plate; the shielding part is slidably arranged at the bottom of the supporting plate. The driving part is installed on the inner wall of the box. According to the powder supply device, powder entering the powder supply box is firstly screened and filtered, so that the fineness of particles of the powder entering the powder supply pipe is ensured, the conditions of powder supply, powder accumulation and blockage are reduced, and the spraying uniformity is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of thermosetting powder coating technology, specifically to a spraying device for thermosetting powder coatings. Background Technology

[0002] Thermosetting powders are powdered substances composed of polymers, additives, fillers, and other raw materials. They are applied to a substrate through processes such as spraying and electrostatic adsorption to form a coating, which is then dried and cross-linked into a film under constant temperature and time. Thermosetting powders are applied using appropriate spraying equipment, mainly consisting of three parts: powder supply, powder hose, and spray gun. Uneven spraying may occur during the process. This is generally overcome by adjusting the spray gun pressure, shortening the powder hose length, and checking for powder accumulation or blockage in the powder supply system.

[0003] However, although the uneven spraying caused by the accumulation and blockage of powder supply can be overcome by clearing the blockage, the problem is prone to recurrence, meaning it is easy to become blocked again, requiring clearing again. This increases the workload of the spraying process, and the blockage problem will become more and more serious over time, directly affecting the normal progress of the spraying work. Utility Model Content

[0004] Therefore, it is necessary to provide a spraying device for thermosetting powder coatings to address the problem of existing powder supply systems accumulating and clogging, requiring repeated unclogging.

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

[0006] A spraying device for thermosetting powder coatings includes a powder supply box, a powder supply pipe connected to the powder supply box, and a spray gun connected to the end of the powder supply pipe; the powder supply box includes a box body, a guide plate, and a filtering mechanism.

[0007] The guide plate is slidably installed at the bottom of the box, and the guiding direction is towards the end of the powder supply pipe;

[0008] The filtration mechanism includes a support plate, a filter screen, a shielding component, and a drive component. The support plate is located above the guide plate and is fixed to the inner wall of the housing, dividing the interior of the housing into a filtration chamber and a powder supply chamber. An opening is formed in the horizontal center of the support plate. The filter screen is horizontally slidably disposed within the opening of the support plate. Grooves for accommodating the ends of the filter screen are formed in the inner wall of the housing and the inner side of the support plate. The shielding component is slidably disposed at the bottom of the support plate to shield the filter screen. The drive component is installed on the inner wall of the housing to drive the filter screen to reciprocate horizontally.

[0009] Furthermore, the driving component includes a motor, a cam, an elastic structure, and a longitudinal plate; the longitudinal plate is located inside the filter chamber and is fixedly connected to the filter screen, and the longitudinal plate is close to the longitudinal bend of the support plate; the motor is mounted on the housing, and the movable end of the motor is eccentrically connected to the cam; the elastic structure is mounted on the longitudinal plate and is in contact with the cam.

[0010] Furthermore, the elastic structure includes a movable rod, a limiting plate, and a spring; one end of the movable rod passes through the support plate and is connected to the longitudinal plate, and the other end of the movable rod is connected to the limiting plate. The spring is disposed between the limiting plate and the support plate to push the limiting plate into contact with the cam.

[0011] Furthermore, the shielding component includes a shielding plate and a telescopic cylinder; the shielding plate is slidably disposed at the bottom of the support plate, and bends upward on the side facing the powder supply pipe and is fixedly connected to the movable end of the telescopic cylinder, and the fixed end of the telescopic cylinder is mounted on the housing.

[0012] Furthermore, the top of the baffle plate, avoiding the area overlapping with the filter screen, is provided with an inverted convex slider, and the bottom of the support plate has a groove that matches the inverted convex slider.

[0013] Furthermore, a limiting groove is provided at the bottom of the housing along the sliding direction of the guide plate, and a limiting protrusion adapted to the limiting groove is provided at the bottom of the guide plate.

[0014] Furthermore, a feed guide plate is provided on the top of the box, and the feed guide plate is connected to the filter chamber of the box.

[0015] Furthermore, a panel is hinged to the side of the housing away from the powder supply pipe, and a transparent observation window is provided on the surface of the housing for observing the filter chamber and the powder supply chamber.

[0016] Furthermore, the drive component includes a vibration motor; the vibration motor is mounted on the housing and close to the filter screen.

[0017] Furthermore, the driving component includes a reciprocating cylinder and a longitudinal plate; the longitudinal plate is located inside the filter chamber and is fixedly connected to the filter screen, and the longitudinal plate is close to the longitudinal bend of the support plate; the movable end of the reciprocating cylinder passes through the support plate and is connected to the longitudinal plate, and the fixed end of the reciprocating cylinder is installed on the housing.

[0018] Compared with the prior art, the beneficial effects of this utility model include:

[0019] 1. This utility model can screen and filter the powder entering the powder supply box by setting a filtration mechanism, intercepting the powder clumps, ensuring the fineness of the powder particles entering the powder supply pipe, reducing powder accumulation and clogging, and thus ensuring uniform spraying.

[0020] 2. This utility model can guide the filtered powder towards the powder supply pipe by setting a guide plate, which facilitates the powder in the powder supply box to enter the powder supply pipe and reduces the accumulation of powder. Attached Figure Description

[0021] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0022] Figure 1 A perspective view of a spraying device for thermosetting powder coatings, as described in this utility model.

[0023] Figure 2 Based on Figure 1 A schematic diagram of the internal structure of the box;

[0024] Figure 3 Based on Figure 2 A sectional view of the side of the enclosure;

[0025] Figure 4 Based on Figure 2 A top-view sectional view of the box.

[0026] The diagram is labeled as follows: 1. Box body; 2. Guide plate; 3. Filtering mechanism; 31. Support plate; 32. Filter screen; 33. Baffle component; 331. Baffle plate; 332. Telescopic cylinder; 34. Drive component; 341. Motor; 342. Cam; 343. Elastic structure; 344. Longitudinal plate; 4. Feed guide plate. Detailed Implementation

[0027] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0028] Example 1

[0029] Please see Figure 1This embodiment introduces a spraying device for thermosetting powder coatings, which mainly consists of a powder supply box, a powder supply pipe, and a spray gun. The powder supply box can be mounted on a corresponding bracket, and the powder supply pipe and spray gun can also be fixedly mounted on the bracket. One end of the powder supply pipe is connected to the powder supply box, and the other end is connected to the spray gun. The powder in the powder supply box is sprayed out through negative pressure. To avoid powder splashing during spraying, a protective cover can be set around the spray gun. The workpiece enters on one side of the protective cover and exits on the other side. The workpiece is sprayed inside the protective cover. The number of spray guns can be the same as the number of powder supply pipes. There is at least one powder supply pipe, preferably multiple powder supply pipes, to improve spraying efficiency.

[0030] like Figure 2 and Figure 3 As shown, the powder supply box mainly consists of a box body 1, a guide plate 2, and a filter mechanism 3. The box body 1 is mounted on a bracket. One bottom side of the box body 1 is connected to the end of the powder supply pipe, and a box plate is hinged to the other side. The box body 1 can be opened through the box plate to observe the internal condition of the box body 1 or to clean the inside of the box body. A feed guide plate 4 is provided on the top of the box body 1 to guide the powder into the box body 1.

[0031] The top of the guide plate 2 is inclined towards the powder supply pipe, and the guide plate 2 is located at the bottom of the box 1 and close to the box plate. The bottom of the guide plate 2 is provided with a limiting protrusion, and the bottom of the box 1 is provided with a corresponding limiting groove. The guide plate 2 can slide at the bottom of the box 1 through the cooperation of the limiting protrusion and the limiting groove. At the same time, the guide plate 2 can also be limited. The guide plate 2 can be removed from the box 1 to facilitate subsequent cleaning operations of the box 1. The side wall of the guide plate 2 is attached to the box 1, and the guide plate 2 maintains a fixed distance from the powder supply pipe. The guide plate 2 guides the powder to a position close to the end of the powder supply pipe, so that the powder can enter from the end of the powder supply pipe.

[0032] like Figure 3 and Figure 4 As shown, the filtration mechanism 3 mainly consists of a support plate 31, a filter screen 32, a shielding component 33, and a driving component 34. The support plate 31 is installed inside the housing 1, dividing the interior of the housing 1 into a filtration chamber and a powder supply chamber. The feed guide plate 4 communicates with the filtration chamber, and the guide plate 2 is located inside the powder supply chamber. The overall shape of the support plate 31 is similar to an L-shape. The filter screen 32 is horizontally slidably disposed within the support plate 31. That is, the middle of the horizontal part of the support plate 31 has an opening for installing the filter screen 32, and the overlapping position of the filter screen 32 and the support plate 31 has a corresponding slide rail, realizing the horizontal sliding of the filter screen 32 on the support plate 31. The inner wall of the housing 1 and the inner side of the support plate 31, located in the sliding direction of the filter screen 32, have grooves for accommodating the end of the filter screen 32. The total length of the distance between the grooves and the groove depth itself is greater than the length of the filter screen 32, in order to accommodate the reciprocating horizontal movement of the filter screen 32.

[0033] like Figure 3As shown, the shielding component 33 mainly includes a shielding plate 331 and a telescopic cylinder 332. The shielding plate 331 has an overall L-shaped shape. The bottom of the shielding plate 331 is attached to the bottom of the support plate 31, and the side is located on the outside of the support plate 31. The fixed end of the telescopic cylinder 332 is installed on the housing 1, and the movable end is connected to the shielding plate 331. The telescopic cylinder 332 maintains a fixed distance longitudinally from the powder supply pipe. In order to make the shielding plate 331 move horizontally and stably, an inverted convex slider is provided on the top of the shielding plate 331, avoiding the area overlapping with the filter screen 32. The bottom of the support plate 31 has a groove that matches the inverted convex slider. The inverted convex slider is located in the groove, which not only cooperates with the horizontal sliding of the shielding plate 331, but also supports the shielding plate 331.

[0034] like Figure 3 As shown, the drive component 34 includes a motor 341, a cam 342, an elastic structure 343, and a longitudinal plate 344. The longitudinal plate 344 is located inside the filter chamber and is fixed to the top of the filter screen 32. The longitudinal plate 344 is located near the longitudinal bend of the support plate 31. The elastic structure 343 mainly includes a movable rod, a limiting plate, and a spring. The support plate 31 has a hole through which the movable rod can pass. One end of the movable rod is connected to the longitudinal plate 344, and the other end passes through the support plate 31 and is connected to the limiting plate. The limiting plate is located on the outside of the support plate 31. A spring is located between the limiting plate and the support plate 31. The spring is used to push the longitudinal plate 344 towards the support plate 31. The outer side of the limiting plate contacts the cam 342. The cam 342 is eccentrically connected to the output shaft of the motor 341. The motor 341 is mounted on the housing 1. The motor 341 drives the cam 342 to rotate. When the cam 342 rotates, the protruding end contacts the limiting plate and compresses the spring. After the protruding end rotates away, the spring returns to its original position, thereby realizing the reciprocating horizontal movement of the longitudinal plate 344, and thus realizing the reciprocating horizontal movement of the filter screen 32.

[0035] It should be noted that, in order to facilitate observation of the inside of the housing 1, a transparent observation window (not shown in the figure) is provided on the surface of the housing 1, which can not only observe the inside of the filter chamber, but also the inside of the powder supply chamber.

[0036] The overall work process is as follows:

[0037] The powder enters the filter chamber through the feed guide plate 4. The telescopic cylinder 332 causes the baffle plate 331 to move away from the bottom of the filter screen 32. The motor 341 is started to make the filter screen 32 move back and forth to filter the powder. The filtered powder flows to the powder supply pipe through the guide plate 2 and is sprayed out from the spray gun under the action of negative pressure to achieve spraying.

[0038] Example 2

[0039] This embodiment introduces a spraying device for thermosetting powder coatings, which has a basically the same structure as the spraying device for thermosetting powder coatings introduced in Embodiment 1. The difference lies in that the driving component 34 in this embodiment adopts a reciprocating cylinder and a longitudinal plate 344. The longitudinal plate 344 is located inside the filter chamber and is fixedly connected to the top of the filter screen 32, and the longitudinal plate 344 is close to the longitudinal bend of the support plate 31. The support plate 31 has a hole that allows the reciprocating cylinder to pass through. The movable end of the reciprocating cylinder passes through the support plate 31 and is connected to the longitudinal plate 344, while the fixed end of the reciprocating cylinder is mounted on the housing 1. During operation, the reciprocating cylinder is activated to move the longitudinal plate 344 back and forth, thereby realizing the reciprocating movement of the filter screen 32.

[0040] This embodiment has the same beneficial effects as Embodiment 1.

[0041] Example 3

[0042] This embodiment introduces a spraying device for thermosetting powder coatings, which has a basically the same structure as the spraying device for thermosetting powder coatings introduced in Embodiment 1. The difference is that the drive component 34 in this embodiment uses a vibration motor 341. The vibration motor 341 is mounted on the housing 1, and the vibration of the vibration motor 341 causes the filter screen 32 to vibrate along with it, thereby achieving the purpose of filtering the powder. It should be emphasized that the installation position of the vibration motor 341 is determined according to the actual situation, and in order to avoid the vibration of the housing 1 affecting the spraying, shock-absorbing structures can be set at the connection between the housing 1 and the support, and at the connection between the powder supply pipe and the housing 1.

[0043] This embodiment has the same beneficial effects as Embodiment 1.

[0044] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A spraying device for thermosetting powder coatings, comprising a powder supply box, a powder supply pipe communicating with the powder supply box, and a spray gun connected to the end of the powder supply pipe; characterized in that, The powder supply box includes: The box body (1) has at least one end of its side wall bottom connected to the end of one of the powder supply pipes; A guide plate (2) is slidably disposed at the bottom of the box body (1) and the guiding direction is toward the end of the powder supply pipe; The filtration mechanism (3) includes a support plate (31), a filter screen (32), a shielding component (33), and a driving component (34). The support plate (31) is located above the guide plate (2) and is fixed to the inner wall of the housing (1), dividing the interior of the housing (1) into a filtration chamber and a powder supply chamber. An opening is opened in the horizontal middle of the support plate (31). The filter screen (32) is horizontally slidably disposed in the opening of the support plate (31). A groove for accommodating the end of the filter screen (32) is opened on the inner wall of the housing (1) and the inner side of the support plate (31). The shielding component (33) is slidably disposed at the bottom of the support plate (31) to shield the filter screen (32). The driving component (34) is installed on the inner wall of the housing (1) to drive the filter screen (32) to move horizontally back and forth.

2. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The drive component (34) includes a motor (341), a cam (342), an elastic structure (343), and a longitudinal plate (344); the longitudinal plate (344) is located inside the filter chamber and is fixed to the filter screen (32), and the longitudinal plate (344) is close to the longitudinal bend of the support plate (31); the motor (341) is mounted on the housing (1), and the movable end of the motor (341) is eccentrically connected to the cam (342); the elastic structure (343) is mounted on the longitudinal plate (344) and is in contact with the cam (342).

3. The spraying equipment for thermosetting powder coatings according to claim 2, characterized in that, The elastic structure (343) includes a movable rod, a limiting plate and a spring; one end of the movable rod passes through the support plate (31) and is connected to the longitudinal plate (344), and the other end of the movable rod is connected to the limiting plate. The spring is set between the limiting plate and the support plate (31) to push the limiting plate to contact the cam (342).

4. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The shielding component (33) includes a shielding plate (331) and a telescopic cylinder (332); the shielding plate (331) is slidably disposed at the bottom of the support plate (31), and the side facing the powder supply pipe is bent upward and fixedly connected to the movable end of the telescopic cylinder (332), and the fixed end of the telescopic cylinder (332) is installed on the housing (1).

5. The spraying equipment for thermosetting powder coatings according to claim 4, characterized in that, The top of the baffle plate (331) and the area that overlaps with the filter screen (32) are provided with an inverted convex slider, and the bottom of the support plate (31) has a groove that matches the inverted convex slider.

6. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, A limiting groove is provided at the bottom of the box (1) along the sliding direction of the guide plate (2), and a limiting protrusion adapted to the limiting groove is provided at the bottom of the guide plate (2).

7. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The top of the housing (1) is provided with a feed guide plate (4), which is connected to the filter chamber of the housing (1).

8. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The box body (1) has a box plate hinged to the side away from the powder supply pipe, and the surface of the box body (1) is provided with a transparent observation window for observing the filter chamber and the powder supply chamber.

9. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The drive unit (34) includes a vibration motor (341); the vibration motor (341) is mounted on the housing (1) and close to the filter screen (32).

10. The spraying equipment for thermosetting powder coatings according to claim 1, characterized in that, The drive component (34) includes a reciprocating cylinder and a longitudinal plate (344); the longitudinal plate (344) is located in the filter chamber and is fixed to the filter screen (32), and the longitudinal plate (344) is close to the longitudinal bend of the support plate (31); the movable end of the reciprocating cylinder passes through the support plate (31) and is connected to the longitudinal plate (344), and the fixed end of the reciprocating cylinder is installed on the housing (1).

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