Preparation System and Preparation Method of a Polyester Powder Coating

Abstract

The present invention relates to a preparation system and a preparation method for a polyester powder coating, comprising: a frame, a collection box is fixedly installed at the right end of the frame, an arc-shaped chute is arranged at the upper part of the frame, a fine grinding housing is rotatably connected to the frame, an opening is arranged on the fine grinding housing, and a cover is arranged on the opening; a fine grinding mechanism is arranged inside the fine grinding housing, and the fine grinding mechanism is used for finely grinding raw materials; a driving mechanism is arranged on the frame, and the driving mechanism is used for driving the fine grinding housing and the fine grinding mechanism to rotate. By rotating the stirring blades, the present invention can turn over and stir the raw materials, not only improving the fine grinding efficiency, but also improving the fine grinding quality. By using the internal cleaning plate and the external cleaning plate, when the fine grinding housing rotates, the polyester powder coating adhered inside can be scraped off and the polyester powder coating can be pushed downward to achieve automatic cleaning.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and particularly relates to a preparation system and a preparation method for polyester powder coatings. Background Art

[0002] Powder coatings are a new type of 100% solid powder coatings without solvents. Powder coatings are divided into thermoplastic powder coatings and thermosetting powder coatings. Among them, compared with other types of powder coatings, polyester powder coatings have the advantages of not using solvents, being pollution-free, saving energy and resources, reducing labor intensity, and having high mechanical strength of the coating film. Moreover, the raw material cost and production cost are relatively low, and the overall film layer is stable after the product is spray-formed, having good application prospects. However, in the prior art, there have always been the following problems when preparing polyester powder coatings:

[0003] 1. When preparing polyester powder coatings, the raw materials extruded by a twin-screw extruder need to be cooled by pressing into tablets and then crushed, and finally the crushed raw materials are finely ground to obtain polyester powder coatings. However, during the fine grinding process, the existing grinding equipment can only perform a single grinding action and cannot turn and stir the raw materials during the grinding process, resulting in uneven grinding degree of the raw materials during the grinding process, not only reducing the fine grinding efficiency, but also affecting the fine grinding quality;

[0004] 2. When preparing polyester powder coatings, due to the large extrusion force between the grinding tool and the polyester powder coatings, a part of the polyester powder coatings will adhere to the grinding tool during the fine grinding process, not only affecting the fine grinding work, but also affecting the work quality of fine grinding;

[0005] 3. When preparing polyester powder coatings, generally, after fine grinding, manual feeding is used, and workers need to clean the polyester powder coatings attached to the inside of the grinding equipment, which consumes a large amount of manpower. Summary of the Invention

[0006] Based on this, in view of the above problems, it is necessary to provide a preparation system and a preparation method for polyester powder coatings, which can improve the fine grinding speed and fine grinding quality.

[0007] The present invention discloses a preparation system for polyester powder coatings, including: a frame, a collection box is fixedly installed at the right end of the frame, an arc-shaped chute is arranged at the upper part of the frame, a fine grinding outer shell is rotatably connected to the frame, an opening is arranged on the fine grinding outer shell, and a cover is arranged at the opening; a fine grinding mechanism is arranged inside the fine grinding outer shell, and the fine grinding mechanism is used for finely grinding the raw materials; a driving mechanism is arranged on the frame, and the driving mechanism is used for driving the fine grinding outer shell and the fine grinding mechanism to rotate.

[0008] In one embodiment, the fine grinding mechanism includes: a fine grinding tool disposed within the fine grinding housing. An adjusting rod is fixedly connected to the fine grinding tool. The adjusting rod passes through the fine grinding housing and is fixedly connected to a first bevel gear; a ball hinge bracket hinged to the fine grinding housing and rotatably connected to the adjusting rod. A slider rotatably connected to the adjusting rod is fixedly connected to the outside of the fine grinding housing. The slider is slidably connected to the chute; a connecting block is installed on both sides of the fine grinding housing where the ball hinge bracket is located. A first tension spring and a second tension spring are respectively installed between the two connecting blocks and the two ends of the slider.

[0009] In one embodiment, an extension bracket is fixedly connected to the inside of the fine grinding housing where the ball hinge bracket is located. A sliding shaft is slidably connected to the extension bracket. A spring for pushing the sliding shaft to move leftward is installed between the sliding shaft and the extension bracket. A second bevel gear is fixedly connected to the sliding shaft. A third bevel gear for meshing with the second bevel gear is fixedly connected to the fine grinding tool. A swing rod for abutting against the fine grinding housing to push the sliding shaft to move rightward is rotatably connected to the middle of the extension bracket. A track ring is rotatably connected to the bottom end of the extension bracket. A plurality of stirring blades are fixedly connected to the lower end of the track ring. And a bevel gear ring for meshing with the second bevel gear is fixedly connected to the common top surface of the plurality of stirring blades.

[0010] In one embodiment, a protrusion is fixedly connected to one end of the swing rod. A swing arm is hinged to the inside of the fine grinding housing where the ball hinge bracket is located. A long groove for slidably connecting with the protrusion is provided at one end of the swing arm. An internal cleaning plate for cleaning the surface of the fine grinding tool and an external cleaning plate for cleaning the inner wall of the fine grinding housing are fixedly connected to the other end of the swing arm.

[0011] In one embodiment, there are four stirring blades, which are distributed in a circumferential array.

[0012] In one embodiment, the driving mechanism includes: a first motor. The output end of the first motor is fixedly connected with a driving pulley and a fourth bevel gear. The driving pulley is connected to a driven pulley fixedly connected to the fine grinding housing through a belt; a transmission mechanism is disposed on the frame. The transmission mechanism is used to connect the fourth bevel gear and the first bevel gear.

[0013] In one embodiment, the transmission mechanism includes: a fifth bevel gear rotatably connected to the frame and configured to mesh with the fourth bevel gear, and the fifth bevel gear is coaxially and fixedly connected with a sixth bevel gear; a seventh bevel gear rotatably connected to the frame and meshing with the sixth bevel gear, and the seventh bevel gear is coaxially and fixedly connected with an eighth bevel gear; a ninth bevel gear rotatably connected to the frame and meshing with the eighth bevel gear, and the ninth bevel gear is coaxially and fixedly connected with a tenth bevel gear configured to mesh with the first bevel gear.

[0014] In one embodiment, a second motor is fixedly connected to the frame, and an output end of the second motor is fixedly connected with a support arm rotatably connected to the fine grinding housing.

[0015] In one embodiment, both the fine grinding tool and the fine grinding housing are spherical.

[0016] A preparation method of a polyester powder coating, applying the preparation system of the polyester powder coating as described above, includes: S1. Feeding: First, remove the cover, put the required finely ground raw materials into the fine grinding housing through the opening, and then install the cover to complete the feeding; S2. Fine grinding: Start the first motor to drive the fine grinding housing to rotate, and at the same time drive the fine grinding tool to rotate. At this time, the tenth bevel gear pushes the ball hinge bracket to swing against the first tension spring and the second tension spring. Therefore, when the fine grinding tool and the fine grinding housing rotate, the raw materials are finely ground. At the same time, due to the swing of the ball hinge bracket, the swing rod contacts the fine grinding housing and controls the swing rod to rotate, thereby overcoming the spring to push the sliding shaft to move to the right, driving the second bevel gear to move to the right and respectively mesh with the third bevel gear and the bevel gear ring. Thus, when the fine grinding tool rotates, it drives the bevel gear ring to rotate accordingly, driving the stirring blades to rotate to turn and stir the raw materials. In addition, due to the rotation of the swing rod, the swing arm is driven to swing, so that the inner cleaning plate cooperates with the surface of the fine grinding tool. Thus, when the fine grinding tool rotates, the inner cleaning plate scrapes off the raw materials adhered to the fine grinding tool; S3. Cleaning: After fine grinding is completed, control the second motor to rotate, drive the support arm to rotate, and then drive the fine grinding housing to rotate so that its opening is downward. During this process, the slider moves along the chute, and drives the fine grinding tool to swing to the middle line position of the fine grinding housing under the action of the first tension spring and the second tension spring, and then drives the swing rod to separate from the fine grinding housing, and drives the swing arm to swing under the action of the spring, so that the outer cleaning plate cooperates with the inner wall of the fine grinding housing. Then control the first motor to rotate, drive the fine grinding housing to rotate, and scrape off the polyester powder coating in the fine grinding housing through the outer cleaning plate to complete the cleaning; S4. Discharging and collecting: After cleaning is completed, remove the cover, pour the polyester powder coating in the fine grinding housing into the collection box, and at the same time start the first motor to drive the fine grinding housing to rotate, so that the outer cleaning plate scrapes off and pushes out the internal polyester powder coating to complete the discharging and collecting.

[0017] Advantages of the present invention:

[0018] 1. By providing a spherical fine grinding tool and a spherical fine grinding housing, and connecting the fine grinding tool and the fine grinding housing in a ball hinge manner, when the opening of the fine grinding housing faces downward, the fine grinding tool moves to the central part of the fine grinding housing under the action of the first tension spring and the second tension spring and does not contact the fine grinding housing. At this time, the raw materials in the fine grinding housing can be poured out from the opening without manual feeding. When the opening of the fine grinding housing faces the horizontal direction, the first bevel gear on the fine grinding tool cooperates with the transmission mechanism, and overcomes the first tension spring and the second tension spring to make the fine grinding tool and the fine grinding housing fit. Therefore, driven by the transmission mechanism, the fine grinding tool can be driven to rotate when the fine grinding housing rotates, and then the raw materials in the fine grinding housing can be finely ground. The structure is novel and easy to use.

[0019] 2. By providing stirring blades, and the stirring blades are all connected to the track ring. Through the transmission of the bevel gear ring, when the fine grinding tool rotates, the track ring is driven to rotate, and then the stirring blades are driven to rotate. Therefore, when the fine grinding tool is grinding, the raw materials can be turned over and stirred by the rotation of the stirring blades, which not only improves the fine grinding efficiency but also improves the fine grinding quality.

[0020] 3. By providing a rotatable swing arm, when the fine grinding tool is working, the swing arm swings to drive the internal cleaning plate to cooperate with the fine grinding tool, and then the polyester powder coating adhered to the surface of the fine grinding tool is cleaned, ensuring the fine grinding quality. When the opening of the fine grinding housing faces downward, the swing arm swings to drive the external cleaning plate to fit with the inner wall of the fine grinding housing. Therefore, when the fine grinding housing rotates, the polyester powder coating adhered inside can be scraped off and pushed downward to complete automatic cleaning and automatic feeding.

[0021] 4. By providing a sliding shaft and a spring, when the opening of the fine grinding housing faces the horizontal direction, since the swing rod contacts the fine grinding housing, the swing rod is driven to rotate, pushing the sliding shaft to move to the right against the spring, thereby driving the second bevel gear on the sliding shaft to move and mesh. Through the cooperation of the bevel gear ring, the fine grinding tool drives the stirring blades to rotate when rotating. At the same time, due to the drive of the swing rod, the swing arm swings to the position where the internal cleaning plate cooperates with the fine grinding tool. When the opening of the fine grinding housing is set downward, under the action of the spring, the sliding shaft pushes the swing rod to rotate, driving the swing arm to swing to the position where the external cleaning plate cooperates with the fine grinding housing, without separate control, and the equipment has a high integration degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view of the present invention;

[0023] Figure 2 is of the present invention Figure 1 Cross-sectional view taken along the line A-A in;

[0024] Figure 3 For the present invention Figure 1 Enlarged view at position I in the present invention;

[0025] Figure 4 Cross-sectional view during blanking of the present invention.

[0026] In the figure, there are frame 1, collection box 11, chute 12, support arm 13, first motor 21, second motor 22, driving pulley 31, driven pulley 32, belt 33, fourth bevel gear 34, fifth bevel gear 351, sixth bevel gear 352, seventh bevel gear 361, eighth bevel gear 362, ninth bevel gear 371, tenth bevel gear 372, fine grinding housing 41, cover 411, opening 412, fine grinding tool 42, adjusting rod 421, track ring 51, stirring blade 511, bevel gear ring 52, external cleaning plate 61, internal cleaning plate 62, swing arm 63, long slot 631, ball hinge bracket 71, slider 711, extension bracket 712, first tension spring 721, second tension spring 722, connecting block 73, first bevel gear 74, swing rod 81, protrusion 811, sliding shaft 82, spring 83, second bevel gear 84, third bevel gear 85. Detailed implementation manners

[0027] 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0028] It should be noted that when a component is referred to as being "installed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0030] Such as Figure 1 And Figure 4As shown in the figure, a preparation system for a polyester powder coating includes: a frame 1, a collection box 11 is fixedly installed at the right end of the frame 1, an arc-shaped chute 12 is arranged at the upper part of the frame 1, a fine grinding shell 41 is rotatably connected to the frame 1, an opening 412 is arranged on the fine grinding shell 41, and a cover 411 is arranged at the opening 412; a fine grinding mechanism is arranged inside the fine grinding shell 41, and the fine grinding mechanism is used for finely grinding raw materials; a driving mechanism is arranged on the frame 1, and the driving mechanism is used for driving the fine grinding shell 41 and the fine grinding mechanism to rotate.

[0031] Preferably, as Figure 1 and Figure 3 shown in the figure, the fine grinding mechanism includes: a fine grinding tool 42 arranged inside the fine grinding shell 41, an adjusting rod 421 is fixedly connected to the fine grinding tool 42, the adjusting rod 421 passes through the fine grinding shell 41 and is fixedly connected with a first bevel gear 74; a ball hinge bracket 71 is hinged to the fine grinding shell 41 and is rotatably connected to the adjusting rod 421, a slider 711 rotatably connected to the adjusting rod 421 is fixedly connected to the outside of the fine grinding shell 41 of the ball hinge bracket 71, and the slider 711 is slidably connected to the chute 12; a connecting block 73 is installed on both sides of the fine grinding shell 41 where the ball hinge bracket 71 is located, and a first tension spring 721 and a second tension spring 722 are respectively installed between the two connecting blocks 73 and the two ends of the slider 711.

[0032] Preferably, as Figures 1 - 4 shown in the figure, an extension bracket 712 is fixedly connected to the inside of the fine grinding shell 41 of the ball hinge bracket 71, a sliding shaft 82 is slidably connected to the extension bracket 712, a spring 83 for pushing the sliding shaft 82 to move leftward is installed between the sliding shaft 82 and the extension bracket 712, a second bevel gear 84 is fixedly connected to the sliding shaft 82, a third bevel gear 85 for meshing with the second bevel gear 84 is fixedly connected to the fine grinding tool 42, a swing rod 81 for abutting against the fine grinding shell 41 to push the sliding shaft 82 to move rightward is rotatably connected to the middle of the extension bracket 712, a track ring 51 is rotatably connected to the bottom end of the extension bracket 712, a plurality of stirring blades 511 are fixedly connected to the lower end of the track ring 51, and a bevel gear ring 52 for meshing with the second bevel gear 84 is fixedly connected to the top surfaces of the plurality of stirring blades 511 together.

[0033] Preferably, as Figure 1 and Figure 3As shown, one end of the swing rod 81 is fixedly connected with a protrusion 811. The ball hinge bracket 71 is hinged with a swing arm 63 inside the fine grinding housing 41. One end of the swing arm 63 is provided with a long groove 631 that slidably connects with the protrusion 811. The other end of the swing arm 63 is fixedly connected with an internal cleaning plate 62 for cleaning the surface of the fine grinding tool 42 and an external cleaning plate 61 for cleaning the inner wall of the fine grinding housing 41.

[0034] Preferably, as Figure 1 and Figure 2 shown, four stirring blades 511 are provided and are distributed in a circumferential array.

[0035] Preferably, as Figure 1 and Figure 3 shown, the drive mechanism includes: a first motor 21, the output end of the first motor 21 is fixedly connected with a driving pulley 31 and a fourth bevel gear 34, the driving pulley 31 is connected with a driven pulley 32 fixedly connected with the fine grinding housing 41 through a belt 33; a transmission mechanism, arranged on the frame 1, the transmission mechanism is used for connecting the fourth bevel gear 34 and the first bevel gear 74.

[0036] Preferably, as Figure 1 and Figure 3 shown, the transmission mechanism includes: a fifth bevel gear 351, rotatably connected to the frame 1 and used for meshing with the fourth bevel gear 34, the fifth bevel gear 351 is coaxially and fixedly connected with a sixth bevel gear 352; a seventh bevel gear 361, rotatably connected to the frame 1 and meshing with the sixth bevel gear 352, the seventh bevel gear 361 is coaxially and fixedly connected with an eighth bevel gear 362; a ninth bevel gear 371, rotatably connected to the frame 1 and meshing with the eighth bevel gear 362, the ninth bevel gear 371 is coaxially and fixedly connected with a tenth bevel gear 372 for meshing with the first bevel gear 74.

[0037] Preferably, as Figure 1 shown, a second motor 22 is fixedly connected to the frame 1, and the output end of the second motor 22 is fixedly connected with a support arm 13 rotatably connected to the fine grinding housing 41.

[0038] It is worth mentioning that, as Figure 1 shown, the output end of the first motor 21 and the output end of the second motor 22 are arranged perpendicularly.

[0039] Preferably, as Figure 1 shown, both the fine grinding tool 42 and the fine grinding housing 41 are spherical.

[0040] As Figures 1 - 4As shown, a preparation method of a polyester powder coating, applying the preparation system of the polyester powder coating as described above, includes:

[0041] S1. Feeding: Figure 1 This is the state when the opening of the fine grinding housing 41 of the present invention is horizontally placed. When feeding is required, first remove the cover 411, put the required fine grinding raw materials into the fine grinding housing 41 through the opening 412, and then install the cover 411 to complete the feeding.

[0042] S2. Fine grinding: Start the first motor 21 to drive the driving pulley 31 to rotate, and drive the driven pulley 32 to rotate through the belt 33, thereby driving the fine grinding housing 41 to rotate. At the same time, the first motor 21 drives the fourth bevel gear 34 to rotate. Since the fourth bevel gear 34 meshes with the fifth bevel gear 351, the sixth bevel gear 352 meshes with the seventh bevel gear 361, the eighth bevel gear 362 meshes with the ninth bevel gear 371, and the tenth bevel gear 372 meshes with the first bevel gear 74, the fine grinding tool 42 is driven to rotate. At this time, the tenth bevel gear 372 pushes the ball hinge bracket 71 to swing against the first tension spring 721 and the second tension spring 722, driving the fine grinding tool 42 and the fine grinding housing 41 to cooperate, so that the raw materials are finely ground when the fine grinding tool 42 and the fine grinding housing 41 rotate. In addition, since the slider 711 slides in the chute 12, the ball hinge bracket 71 does not rotate, and due to the swing of the ball hinge bracket 71, the swing rod 81 contacts the fine grinding housing 41, thereby driving the swing rod 81 to rotate, pushing the sliding shaft 82 to move against the spring 83, driving the second bevel gear 84 to move to the right and meshing with the third bevel gear 85 and the bevel gear ring 52 respectively. Thus, when the fine grinding tool 42 rotates, the bevel gear ring 52 is driven to rotate accordingly. Since the bevel gear ring 52 is fixedly connected to the four stirring blades 511, and the track ring 51 slides and cooperates with the ball hinge bracket 71, the stirring blade 52 is driven to rotate to turn over and stir the raw materials. At the same time, since the swing rod 81 rotates and the protrusion 811 slides and cooperates in the long groove 631, the swing arm 63 is driven to swing, so that the internal cleaning plate 62 cooperates with the fine grinding tool 42. When the fine grinding tool 42 rotates, the raw materials adhered to the fine grinding tool 42 are scraped off to ensure the fine grinding quality.

[0043] S3. Cleaning: After fine grinding, control the second motor 22 to rotate, drive the support arm 13 to rotate, and then drive the fine grinding housing 41 to rotate so that its opening faces downward, as Figure 4During this process, the slider 711 moves along the slide groove 12, and under the action of the first tension spring 721 and the second tension spring 722, the ball joint bracket 71 swings, driving the fine grinding tool 42 to swing to the center line position of the fine grinding shell 41, and the two separate, and the swing rod 81 separates from the fine grinding shell 41. Under the action of the spring 83, the sliding shaft 82 pushes the swing rod 81 to swing, and then drives the swing arm 63 to swing, so that the external cleaning plate 61 and the inner wall of the fine grinding shell 41 are matched. Then, the first motor 21 is controlled to rotate, driving the fine grinding shell 41 to rotate, and the polyester powder coating in the fine grinding shell 41 is scraped off through the external cleaning plate 61 to complete the cleaning;

[0044] S4. Material collection: After cleaning is completed, the cover 411 is removed, and the polyester powder coating in the fine grinding shell 41 is poured into the collection box 11. At the same time, the first motor 21 is started to drive the fine grinding shell 41 to rotate, so that the external cleaning plate 61 scrapes off and pushes out the internal polyester powder coating to complete the material collection.

[0045] 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.

[0046] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A preparation system for a polyester powder coating, characterized in that, Including: A frame, a collection box is fixedly installed at the right end of the frame, an arc-shaped chute is arranged at the upper part of the frame, a fine grinding housing is rotatably connected to the frame, an opening is arranged on the fine grinding housing, and a cover is arranged on the opening; A fine grinding mechanism, arranged inside the fine grinding housing, and the fine grinding mechanism is used for finely grinding raw materials; A driving mechanism, arranged on the frame, and the driving mechanism is used to drive the fine grinding housing and the fine grinding mechanism to rotate; The fine grinding mechanism includes: A fine grinding tool, arranged inside the fine grinding housing, an adjusting rod is fixedly connected to the fine grinding tool, the adjusting rod passes through the fine grinding housing and is fixedly connected with a first bevel gear; A ball hinge bracket, hinged to the fine grinding housing and rotatably connected to the adjusting rod, a slider rotatably connected to the adjusting rod is fixedly connected to the outside of the fine grinding housing, and the slider is slidably connected to the chute; Connecting blocks, installed on both sides of the fine grinding housing where the ball hinge bracket is located, a first tension spring and a second tension spring are respectively installed between the two connecting blocks and the two ends of the slider.

2. The preparation system of the polyester powder coating according to claim 1, characterized in that, An extension bracket is fixedly connected to the inside of the fine grinding housing of the ball hinge bracket, a sliding shaft is slidably connected to the extension bracket, a spring for pushing the sliding shaft to move leftward is installed between the sliding shaft and the extension bracket, a second bevel gear is fixedly connected to the sliding shaft, a third bevel gear for meshing with the second bevel gear is fixedly connected to the fine grinding tool, a swing rod for abutting against the fine grinding housing to push the sliding shaft to move rightward is rotatably connected to the middle of the extension bracket, an orbital ring is rotatably connected to the bottom end of the extension bracket, a plurality of stirring blades are fixedly connected to the lower end of the orbital ring, and a bevel gear ring for meshing with the second bevel gear is fixedly connected to the common top surface of the plurality of stirring blades.

3. The preparation system of the polyester powder coating according to claim 2, wherein, A protrusion is fixedly connected to one end of the swing rod, a swing arm is hinged inside the fine grinding housing of the ball hinge bracket, a long groove for slidably connecting with the protrusion is arranged at one end of the swing arm, and an internal cleaning plate for cleaning the surface of the fine grinding tool and an external cleaning plate for cleaning the inner wall of the fine grinding housing are fixedly connected to the other end of the swing arm.

4. The preparation system of the polyester powder coating according to claim 3, characterized in that, There are four stirring blades, and they are distributed in a circumferential array.

5. The preparation system of the polyester powder coating according to claim 4, characterized in that, The driving mechanism includes: A first motor, a driving pulley and a fourth bevel gear are fixedly connected to the output end of the first motor, and the driving pulley is connected to a driven pulley fixedly connected to the fine grinding housing through a belt; A transmission mechanism, arranged on the frame, and the transmission mechanism is used to connect the fourth bevel gear and the first bevel gear.

6. The preparation system of the polyester powder coating according to claim 5, characterized in that, The transmission mechanism includes: A fifth bevel gear, rotatably connected to the frame and used for meshing with the fourth bevel gear, and a sixth bevel gear is coaxially fixedly connected to the fifth bevel gear; A seventh bevel gear, rotatably connected to the frame and meshing with the sixth bevel gear, and an eighth bevel gear is coaxially fixedly connected to the seventh bevel gear; The ninth bevel gear is rotatably connected to the frame and meshes with the eighth bevel gear. A tenth bevel gear for meshing with the first bevel gear is coaxially and fixedly connected to the ninth bevel gear.

7. The preparation system of the polyester powder coating according to claim 6, characterized in that, A second motor is fixedly connected to the frame. The output end of the second motor is fixedly connected to a support arm rotatably connected to the fine grinding housing.

8. The preparation system of the polyester powder coating according to claim 7, characterized in that, Both the fine grinding tool and the fine grinding housing are spherical.

9. A preparation method of a polyester powder coating, applying the preparation system of the polyester powder coating as described in claim 8, characterized in that, It includes: S1. Feeding: First, remove the cover, put the required fine grinding raw material into the fine grinding housing through the opening, and then install the cover to complete the feeding. S2. Fine grinding: Start the first motor to drive the fine grinding housing to rotate, and at the same time drive the fine grinding tool to rotate. At this time, the tenth bevel gear pushes the ball hinge bracket to swing against the first tension spring and the second tension spring. Therefore, when the fine grinding tool and the fine grinding housing rotate, the raw material is finely ground. At the same time, due to the swing of the ball hinge bracket, the swing rod contacts the fine grinding housing and controls the swing rod to rotate, thereby overcoming the spring to push the sliding shaft to move to the right, driving the second bevel gear to move to the right and mesh with the third bevel gear and the bevel gear ring respectively. Thus, when the fine grinding tool rotates, it drives the bevel gear ring to rotate accordingly, driving the stirring blades to rotate to turn and stir the raw material. In addition, due to the rotation of the swing rod, it drives the swing arm to swing, so that the inner cleaning plate cooperates with the surface of the fine grinding tool. Therefore, when the fine grinding tool rotates, the inner cleaning plate scrapes off the raw material adhered to the fine grinding tool. S3. Cleaning: After fine grinding, control the second motor to rotate, drive the support arm to rotate, and then drive the fine grinding housing to rotate so that its opening faces downward. During this process, the slider moves along the chute and drives the fine grinding tool to swing to the midline position of the fine grinding housing under the action of the first tension spring and the second tension spring, and then drives the swing rod to separate from the fine grinding housing, and drives the swing arm to swing under the action of the spring, so that the outer cleaning plate cooperates with the inner wall of the fine grinding housing. Then control the first motor to rotate, drive the fine grinding housing to rotate, and scrape off the polyester powder coating in the fine grinding housing through the outer cleaning plate to complete the cleaning. S4. Discharging and collecting: After cleaning, remove the cover, pour the polyester powder coating in the fine grinding housing into the collection box, and at the same time start the first motor to drive the fine grinding housing to rotate, so that the outer cleaning plate scrapes off and pushes out the polyester powder coating inside to complete the discharging and collecting.

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