Preparation device and preparation method of electrophoretic paint with high edge corrosion resistance

Abstract

The invention relates to the technical field of corrosion-resistant paint preparation, in particular to a high-edge corrosion-resistant electrophoretic paint preparation device and a preparation method thereof.The high-edge corrosion-resistant electrophoretic paint preparation device comprises a stirring barrel, a blending bin is fixedly connected to the top of the stirring barrel, a first motor is mounted at the top of the blending bin, and a feeding pipe is mounted at the top of the blending bin; a discharging opening is formed in the bottom of the stirring barrel, a control box is installed on the outer side of the blending bin, a batching mechanism is arranged in the blending bin, and a linkage mechanism is arranged on the outer side of the batching mechanism. Through the arrangement of the batching mechanism, different raw materials are poured from a feeding pipe, a proper proportion is adjusted by observing scale marks on the surface of the feeding pipe, a discharging opening channel of the feeding pipe is blocked, a first connecting rod drives a material guiding block to rotate by 180 degrees, and the raw materials are fed into the feeding pipe; the raw materials fall into the surface of the first partition plate from the material guide pipe through the flow guide of the material guide block, so that the raw materials can be blended according to a reasonable proportion before mixing, and the mixing effect is prevented from being influenced by different proportions.

Description

Technical Field

[0001] This invention relates to the field of corrosion-resistant paint preparation technology, specifically to an apparatus and method for preparing high-edge corrosion-resistant electrophoretic paint. Background Technology

[0002] As the automotive market becomes increasingly demanding in its requirements for integrated coating, more stringent requirements are being placed on vehicle body corrosion protection.

[0003] In electrophoretic coating, complex-shaped automotive parts or metal workpieces often encounter various edges and sharp corners formed during processing. Before electrophoretic curing, the coating has good coverage of these edges and corners. However, during curing, the high-temperature baking reduces the resin viscosity. Due to surface tension, the coating at the edges shrinks towards the center, reducing the film thickness at sharp edges and causing the substrate to be exposed at the edges and corners. This results in poor edge and corner coverage and a high susceptibility to severe corrosion. Globally, approximately one-quarter of automotive parts are corroded annually due to edge and corner rust, causing significant material waste. Therefore, developing technical measures to reduce or even avoid edge and corner corrosion has become a crucial issue for the automotive parts industry.

[0004] The development of high-edge corrosion-resistant cathodic electrophoretic coatings involves improving the corrosion resistance of sharp edges by adding organic polymers and inorganic additives. Electrophoretic coatings with high edge corrosion resistance, prepared by adding microgel organic polymer additives to the coating, were applied under the same conditions using a phosphating blade and subjected to salt spray tests. While commonly used electrophoretic coatings showed 100 rust spots, the high-edge-effect coating showed no rust spots, demonstrating superior edge corrosion resistance. This is of great significance for the lower edges and corners of automobile bodies, extending the vehicle's service life. Improving the edge coverage and edge corrosion resistance of electrophoretic coatings has become one of the development directions for electrophoretic coatings.

[0005] However, the main technical challenges are as follows:

[0006] 1. With the addition of microgels, the raw materials are poured directly into the device, making it impossible to adjust the proportion of the mixed raw materials. Furthermore, clumps formed without sufficient stirring will fall directly into the device due to their own gravity. These clumps cannot be fully stirred and broken up, affecting the quality of the subsequent finished products.

[0007] 2. The appearance of the product is significantly affected. As the proportion of microgel increases, the orange peel phenomenon of the paint film will be significantly aggravated, and the film application speed will gradually decrease. To address these issues, we propose a high edge corrosion resistant electrophoretic paint preparation device and preparation method. Summary of the Invention

[0008] The purpose of this invention is to provide an apparatus and method for preparing high edge corrosion resistant electrophoretic paint, so as to solve the problems mentioned in the background art, such as the inconvenience of adjusting the proportion of various raw materials, the significant aggravation of orange peel phenomenon in the paint film as the proportion of microgel increases, and the gradual decrease in film application speed.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a high edge corrosion resistant electrophoretic paint preparation device and preparation method thereof, comprising a stirring drum, a mixing chamber fixedly connected to the top of the stirring drum, a first motor installed on the top of the mixing chamber, a feed pipe installed on the top of the mixing chamber, a discharge port installed at the bottom of the stirring drum, a control box installed on the outside of the mixing chamber, a batching mechanism provided inside the mixing chamber, and a linkage mechanism provided on the outside of the batching mechanism;

[0010] The batching mechanism includes a servo motor, a first connecting rod, a guide block, and a guide pipe. A guide pipe is provided at the top of the mixing chamber corresponding to the position of the feed pipe. A servo motor is provided inside the control box. A first connecting rod is provided on the outside of the servo motor. A guide block is provided at the end of the first connecting rod. A drive wheel is provided on the outside of the first connecting rod.

[0011] The linkage mechanism includes a limiting mechanism and a distribution mechanism. The limiting mechanism is located above the dispensing mechanism, and the distribution mechanism is located below the dispensing mechanism.

[0012] Preferably, the limiting mechanism includes a second connecting rod, a first driven gear, a first bevel gear, a first adjusting ring, and a first tooth. The top of the control box is rotatably connected to the second connecting rod, one end of which is fixedly connected to the first driven gear, and the other end of which is fixedly connected to the first bevel gear. The top of the mixing chamber is rotatably connected to the first adjusting ring, which has a connecting hole corresponding to the feed pipe inside. The bottom of the first adjusting ring is equidistantly connected with the first tooth, which meshes with the first bevel gear.

[0013] Preferably, the servo motor is fixedly installed inside the control box, the first connecting rod is fixedly connected to the output end of the servo motor, the other end of the first connecting rod is fixedly connected to a guide block, the top of the guide pipe is fixedly connected to the inner wall of the mixing chamber, the bottom of the guide pipe faces the guide block, and the drive wheel is fixedly connected to the surface of the first connecting rod.

[0014] Preferably, the circulation mechanism includes a third connecting rod, a second driven gear, a second bevel gear, a first partition, a second tooth, and a second partition. The bottom of the control box is rotatably connected to the third connecting rod. One end of the third connecting rod is fixedly connected to the second driven gear, and the other end of the third connecting rod is fixedly connected to the second bevel gear. The bottom of the mixing chamber is rotatably connected to the first partition. Several sets of second teeth are equidistantly connected to the edge of the first partition in a ring. The second teeth mesh with the second bevel gear. The bottom inner wall of the mixing chamber is fixedly connected to the second partition. Both the first partition and the second partition have holes inside.

[0015] Preferably, the output end of the first motor is fixedly connected to a stirring rod inside the stirring drum, and a connecting plate is provided on the outer side of the stirring rod inside the mixing chamber.

[0016] Preferably, a connecting ring is fixedly connected to the outer side of the stirring rod, two sets of connecting plates are fixedly connected to the outer side of the connecting ring, and a scraper is fixedly connected to the bottom of the connecting plate.

[0017] Preferably, half of the guide block is spherical and the other half is conical.

[0018] Preferably, the dimensions of the first driven gear, the driving gear, and the second driven gear increase sequentially.

[0019] Preferably, the bottom of the scraper is in contact with the first partition, and the cross-section of the scraper is an isosceles trapezoid.

[0020] A method for preparing a high-edge corrosion-resistant electrophoretic paint includes the following steps:

[0021] S1, Synthesis of Microgels

[0022] 1.1 Preparation of microgel intermediates

[0023] After chain extension of epoxy resin and bisphenol A under the action of a catalyst, BS-1023M-73 resin with small molecule amine and a large amount of ketimide is added to graft the resin into a resin with a large amount of primary amine. Then, an appropriate amount of acetic acid is added for acidification and emulsification to obtain the intermediate we need.

[0024] 1.2 Synthesis of Microgels

[0025] The microgel intermediate was placed in a four-necked flask, and an appropriate amount of 128 epoxy resin was added. The temperature was raised to 85°C and maintained for 2–4 hours, during which a large amount of pure water was added. As the resin viscosity increased, the resin was continuously diluted with pure water to prevent it from gelling due to excessive viscosity. After cooling, the desired microgel additive was obtained.

[0026] S2. Add the microgel to the emulsion.

[0027] Synthesis process:

[0028] A. The bisphenol A modified epoxy resin was diluted with solvent and then reacted with amine. The temperature was controlled at about 100℃ and the reaction was carried out for 2 hours.

[0029] B. Cool down and add crosslinking agent;

[0030] C. Add various additives;

[0031] D. Add acid water to acidify the amine-modified epoxy resin;

[0032] E. Add pure water for emulsification, and then add the microgel resin we synthesized earlier.

[0033] The effect of different amounts of S3 microgels on coating film performance

[0034] 3.1 When the microgel is added to 3% of the emulsion, the leveling of the paint film is acceptable, and the orange peel effect is relatively good.

[0035] 3.2 Effect on Salt Spray Corrosion Performance of Edges and Corners

[0036] When the microgel is added to the emulsion at 4%, the salt spray effect is the best. However, considering that the leveling of the paint film is not good at this point, customers are unlikely to accept the appearance effect at this point. Therefore, we choose the second best amount of 3% as the amount added to the final formula.

[0037] Compared with the prior art, the beneficial effects of the present invention are:

[0038] 1. This invention, through the setting of the batching mechanism, pours different raw materials into the feed pipe separately. By observing the scale lines on the surface of the feed pipe, the appropriate ratio is adjusted. The outlet channel of the feed pipe is blocked, and the first connecting rod drives the guide block to rotate 180 degrees, so that the raw materials fall from the guide pipe through the guide block onto the surface of the first partition. This facilitates the reasonable proportioning of raw materials before mixing and avoids different proportions from affecting the mixing effect.

[0039] 2. By setting up a limiting mechanism, the present invention enables the driving wheel to drive the first driven gear to rotate, which in turn causes the first bevel gear to drive the first adjusting ring to rotate through the first teeth. This overlaps the connecting hole with the bottom of the feed pipe, making it easier for the raw material to flow out from the connecting hole and preventing leakage before the mixing ratio is completed, thus affecting the mixing ratio and observation results.

[0040] 3. The present invention, through the setting of the circulation mechanism, drives the second driven gear and the third connecting rod to rotate through the driving wheel, thereby driving the first partition to rotate, so that the holes of the first partition and the second partition overlap. After the mixture is evenly mixed, the connecting plate pushes the raw material, and the evenly mixed raw material falls into the mixing drum through the holes of the first partition and the second partition, thus avoiding the raw material from entering the mixing drum before it is evenly mixed, which would affect the quality of the finished product.

[0041] 4. This invention greatly improves the edge salt spray corrosion resistance of the product, increasing it from the original 48 hours to about 200 hours, thus enhancing the product's competitiveness in the automotive parts coating market. It is expected to bring the company sales of 200 tons per month. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a front view schematic diagram of the structure of the present invention;

[0044] Figure 2 For the present invention Figure 1 A cross-sectional view of the internal structure of the mixing drum;

[0045] Figure 3 This is a schematic diagram of the dispensing mechanism of the present invention;

[0046] Figure 4 This is a schematic diagram of the distribution mechanism of the present invention;

[0047] Figure 5 For the present invention Figure 4 A magnified view of part A in the diagram;

[0048] Figure 6 This is a diagram of the emulsion formulation of the present invention;

[0049] Figure 7 This is a graph showing the effect of different amounts of microgel added to the coating film on the performance of the coating film.

[0050] Figure 8 This relates to the effect of the salt spray corrosion performance of the edges and corners of the present invention.

[0051] In the diagram: 1. Mixing drum; 2. Mixing bin; 3. Feed pipe; 4. Discharge port; 5. Control box; 6. Batching mechanism; 601. Servo motor; 602. First connecting rod; 603. Guide block; 604. Guide pipe; 605. Drive wheel; 7. Limiting mechanism; 701. Second connecting rod; 702. First driven gear; 703. First bevel gear; 704. First adjusting ring; 705. First tooth; 706. Connecting hole; 8. Flow mechanism; 801. Third connecting rod; 802. Second driven gear; 803. Second bevel gear; 804. First partition; 805. Second tooth; 806. Second partition; 9. First motor; 10. Mixing rod; 11. Connecting ring; 12. Connecting plate; 13. Scraper. Detailed Implementation

[0052] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0053] Please see Figure 1-8 An embodiment of the present invention provides a high edge corrosion resistant electrophoretic paint preparation device and preparation method, including a stirring drum 1, a mixing chamber 2 fixedly connected to the top of the stirring drum 1, a first motor 9 installed on the top of the mixing chamber 2, two sets of feed pipes 3 installed on the top of the mixing chamber 2, the surface of the feed pipes 3 is provided with scale lines and is made of transparent material for easy observation, a discharge port 4 is installed at the bottom of the stirring drum 1, a control box 5 is installed on the outside of the mixing chamber 2, a control panel is installed on the surface of the control box 5, a batching mechanism 6 is provided inside the mixing chamber 2, and a linkage mechanism is provided on the outside of the batching mechanism 6;

[0054] The batching mechanism 6 includes a servo motor 601, a first connecting rod 602, a guide block 603, and a guide pipe 604. Two sets of guide pipes 604 are provided at the top of the mixing chamber 2 corresponding to the feed pipe 3. The servo motor 601 is installed inside the control box 5. The first connecting rod 602 is installed on the outside of the servo motor 601. The guide block 603 is installed at the end of the first connecting rod 602. The drive wheel 605 is installed on the outside of the first connecting rod 602. The linkage mechanism includes a limiting mechanism 7 and a flow mechanism 8. The limiting mechanism 7 is located above the batching mechanism 6, and the flow mechanism 8 is located below the batching mechanism 6. Different raw materials are poured into the feed pipe 3 and mixed in a specified ratio. They are then introduced into the mixing chamber 2 for preliminary mixing to improve the subsequent mixing effect before entering the mixing drum 1.

[0055] This device solves the problem of inconvenience in adjusting the proportion of various raw materials, the orange peel phenomenon of the paint film will be significantly aggravated as the proportion of microgel increases, and the film application speed will gradually decrease, by setting up the batching mechanism 6 and the linkage mechanism.

[0056] Furthermore, the limiting mechanism 7 includes a second connecting rod 701, a first driven gear 702, a first bevel gear 703, a first adjusting ring 704, and a first tooth 705. The top of the control box 5 is rotatably connected to the second connecting rod 701. One end of the second connecting rod 701 is fixedly connected to the first driven gear 702, and the other end of the second connecting rod 701 is fixedly connected to the first bevel gear 703. The top of the mixing chamber 2 is rotatably connected to the first adjusting ring 704. The interior of the first adjusting ring 704 has a connecting hole 706 corresponding to the feed pipe 3. The bottom of the first adjusting ring 704 is circumferentially and equidistantly connected with the first teeth 705, which mesh with the first bevel gear 703. Figure 5 As shown, this structure is used to drive the second connecting rod 701 to rotate by the meshing of the driving wheel 605 and the first driven gear 702. Under the action of the meshing of the first bevel gear 703 and the first tooth 705, the first adjusting ring 704 is rotated, and the connecting hole 706 is moved to the bottom of the feed pipe 3, so that the proportioned raw materials can flow through the connecting hole 706.

[0057] Furthermore, the servo motor 601 is fixedly installed inside the control box 5, the first connecting rod 602 is fixedly connected to the output end of the servo motor 601, the other end of the first connecting rod 602 is fixedly connected to the guide block 603, the top of the guide tube 604 is fixedly connected to the inner wall of the mixing chamber 2, the bottom of the guide tube 604 faces the guide block 603, and the drive wheel 605 is fixedly connected to the surface of the first connecting rod 602. Figure 3 As shown, this structure is used to start the servo motor 601 after the proportioning is completed, drive the guide block 603 to rotate, so that the guide block 603 is separated from the opening of the guide pipe 604, and the proportioned raw materials flow from the guide pipe 604 into the mixing chamber 2 for mixing.

[0058] Furthermore, the distribution mechanism 8 includes a third connecting rod 801, a second driven gear 802, a second bevel gear 803, a first partition 804, second teeth 805, and a second partition 806. The bottom of the control box 5 is rotatably connected to the third connecting rod 801. One end of the third connecting rod 801 is fixedly connected to the second driven gear 802, and the other end of the third connecting rod 801 is fixedly connected to the second bevel gear 803. The bottom of the mixing chamber 2 is rotatably connected to the first partition 804. Several sets of second teeth 805 are equidistantly connected to the edge of the first partition 804 in a ring shape. The second teeth 805 mesh with the second bevel gear 803. The bottom inner wall of the mixing chamber 2 is fixedly connected to the second partition 806. Both the first partition 804 and the second partition 806 have holes inside. Figure 4 As shown, this structure is used to drive the second bevel gear 803 to rotate through the meshing of the driving wheel 605 and the second driven gear 802, thereby driving the first partition 804 to rotate through the second teeth 805, so that the holes at the first partition 804 overlap with the holes at the second partition 806, allowing the raw materials initially mixed inside the mixing chamber 2 to flow into the mixing drum 1, thus improving working efficiency.

[0059] Furthermore, the output end of the first motor 9 is fixedly connected to a stirring rod 10 inside the stirring drum 1, and a connecting plate 12 is provided on the outer side of the stirring rod 10 inside the mixing chamber 2. For example... Figure 4 As shown, this structure is used to stir and mix the raw materials in the stirring drum 1 by stirring rod 10, and at the same time drive the connecting plate 12 to perform preliminary stirring and mixing of the raw materials in the mixing chamber 2.

[0060] Furthermore, a connecting ring 11 is fixedly connected to the outer side of the stirring rod 10, and two sets of connecting plates 12 are fixedly connected to the outer side of the connecting ring 11. A scraper 13 is fixedly connected to the bottom of the connecting plate 12. Figure 4 As shown, this structure is used to clean the surface of the first partition 804 by the scraper 13 during mixing, so as to prevent raw materials from settling or adsorbing on the surface of the first partition 804, thereby improving the applicability of the device.

[0061] Furthermore, half of the guide block 603 is spherical and the other half is conical. The bottom of the guide tube 604 faces the guide block 603, and its bottom opening is adapted to fit the guide block 603. Figure 3 As shown, the structure is used to close the guide tube 604 by the shape features of the guide block 603. After the guide block 603 is flipped, the raw material at the guide tube 604 is guided by the conical surface.

[0062] Furthermore, the dimensions of the first driven gear 702, the driving gear 605, and the second driven gear 802 increase sequentially. For example... Figure 3As shown, this structure is used to mesh with the first driven gear 702 and the second driven gear 802 through the driving wheel 605. Because the diameters of the driving wheel 605, the first driven gear 702 and the second driven gear 802 are different, when the driving wheel 605 rotates one revolution, the first driven gear 702 rotates one and a half revolutions and the first partition 804 rotates ninety degrees. When the guide block 603 rotates one revolution, the connecting hole 706 is in the open position, and the first partition 804 and the second partition 806 are in the staggered position. When the mixing chamber 2 is finished, the guide block 603 rotates one revolution again. At this time, the holes at the first partition 804 and the second partition 806 overlap.

[0063] Furthermore, the bottom of scraper 13 is in contact with the first partition 804, the cross-section of scraper 13 is an isosceles trapezoid, and the two scrapers 13 are oriented in opposite directions. Figure 4 As shown, this structure is used to facilitate the scraping of raw materials from the surface of the first partition 804 by means of scraper 13.

[0064] A method for preparing a high-edge corrosion-resistant electrophoretic paint includes the following steps:

[0065] S1, Synthesis of Microgels

[0066] 1.1 Preparation of microgel intermediates

[0067] After chain extension of epoxy resin and bisphenol A under the action of a catalyst, BS-1023M-73 resin with small molecule amine and a large amount of ketimide is added to graft the resin into a resin with a large amount of primary amine. Then, an appropriate amount of acetic acid is added for acidification and emulsification to obtain the intermediate we need.

[0068] 1.2 Synthesis of Microgels

[0069] The microgel intermediate was placed in a four-necked flask, and an appropriate amount of 128 epoxy resin was added. The temperature was raised to 85°C and maintained for 2–4 hours, during which a large amount of pure water was added. As the resin viscosity increased, the resin was continuously diluted with pure water to prevent it from gelling due to excessive viscosity. After cooling, the desired microgel additive was obtained.

[0070] S2. Add the microgel to the emulsion.

[0071] Synthesis process:

[0072] A. The bisphenol A modified epoxy resin was diluted with solvent and then reacted with amine. The temperature was controlled at about 100℃ and the reaction was carried out for 2 hours.

[0073] B. Cool down and add crosslinking agent;

[0074] C. Add various additives;

[0075] D. Add acid water to acidify the amine-modified epoxy resin;

[0076] E. Add pure water for emulsification, and then add the microgel resin we synthesized earlier.

[0077] The effect of different amounts of S3 microgels on coating film performance

[0078] 3.1 When the microgel is added to 3% of the emulsion, the leveling of the paint film is acceptable, and the orange peel effect is relatively good.

[0079] 3.2 Effect on Salt Spray Corrosion Performance of Edges and Corners

[0080] When the microgel is added to the emulsion at 4%, the salt spray effect is the best. However, considering that the leveling of the paint film is not good at this point, customers are unlikely to accept the appearance effect at this point. Therefore, we choose the second best amount of 3% as the amount added to the final formula.

[0081] Working principle: When using, such as Figure 1 and Figure 3 As shown, different raw materials are poured into the feed pipe 3 and mixed in a specified ratio, allowing them to enter the mixing chamber 2. After mixing, the servo motor 601 is started, driving the guide block 603 to rotate, causing the guide block 603 to disengage from the opening of the guide pipe 604. The mixed raw materials flow from the guide pipe 604 into the mixing chamber 2 for mixing. After the guide block 603 flips, it guides the raw materials at the guide pipe 604 through a conical surface. Simultaneously, as... Figure 3 and Figure 5 As shown, the driving wheel 605 and the first driven gear 702 mesh with each other, causing the first driven gear 702 to drive the second connecting rod 701 to rotate. Under the action of the first bevel gear 703 and the first tooth 705 meshing with each other, the first adjusting ring 704 rotates, moving the connecting hole 706 to the bottom of the feed pipe 3, allowing the proportioned raw materials to flow through the connecting hole 706. Figure 2 and Figure 4 As shown, starting the first motor 9 drives the stirring rod 10 to rotate, which stirs and mixes the raw materials in the stirring drum 1. Simultaneously, it drives the connecting plate 12 to initially stir and mix the raw materials in the mixing chamber 2. Figure 3 and Figure 4As shown, the servo motor 601 is restarted, causing the guide block 603 to rotate one revolution again. At this time, the driving wheel 605 and the second driven gear 802 mesh together, causing the third connecting rod 801 to drive the second bevel gear 803 to rotate. This, in turn, causes the second tooth 805 to drive the first partition 804 to rotate, aligning the holes at the first partition 804 with the holes at the second partition 806. This allows the initially mixed raw materials inside the mixing chamber 2 to flow into the mixing drum 1, where they are mixed again. This process is repeated to complete the preparation. The above describes the entire working principle of this invention. It is obvious to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the invention is defined by the appended claims rather than the foregoing description, and all variations falling within the meaning and scope of the equivalents of the claims are intended to be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for preparing a high-edge corrosion-resistant electrophoretic paint, comprising a stirring barrel (1), characterized in that: The top of the stirring barrel (1) is fixedly connected with a blending bin (2), a first motor (9) is installed at the top of the blending bin (2), a feeding pipe (3) is installed at the top of the blending bin (2), a discharge port (4) is installed at the bottom of the stirring barrel (1), a control box (5) is installed outside the blending bin (2), a batching mechanism (6) is arranged in the blending bin (2), and a linkage mechanism is arranged outside the batching mechanism (6). The batching mechanism (6) comprises a servo motor (601), a first connecting rod (602), a guide block (603) and a guide pipe (604), the top of the blending bin (2) is provided with the guide pipe (604) at a position corresponding to the feeding pipe (3), the inside of the control box (5) is provided with the servo motor (601), the outside of the servo motor (601) is provided with the first connecting rod (602), the end of the first connecting rod (602) is provided with the guide block (603), and the outside of the first connecting rod (602) is provided with a driving wheel (605). The linkage mechanism comprises a limiting mechanism (7) and a flow-through mechanism (8), the limiting mechanism (7) is located above the batching mechanism (6), and the flow-through mechanism (8) is located below the batching mechanism (6).

2. The high-edge corrosion-resistant electrophoretic paint preparation device according to claim 1, characterized by: The limiting mechanism (7) comprises a second connecting rod (701), a first driven gear (702), a first bevel gear (703), a first adjusting ring (704) and a first tooth (705), the top of the control box (5) is rotatably connected with the second connecting rod (701), one end of the second connecting rod (701) is fixedly connected with the first driven gear (702) on the control box (5), the other end of the second connecting rod (701) is fixedly connected with the first bevel gear (703), the top of the blending bin (2) is rotatably connected with the first adjusting ring (704), the inside of the first adjusting ring (704) is provided with a communication hole (706) corresponding to the feeding pipe (3), the bottom of the first adjusting ring (704) is annularly and equidistantly connected with the first tooth (705), and the first tooth (705) is in meshing connection with the first bevel gear (703).

3. The apparatus for preparing a high-edge corrosion-resistant electrophoretic paint according to claim 1, characterized by: The servo motor (601) is fixedly installed in the inside of the control box (5), the first connecting rod (602) is fixedly connected with the output end of the servo motor (601), the other end of the first connecting rod (602) is fixedly connected with the guide block (603), the top of the guide pipe (604) is fixedly connected with the inner wall of the blending bin (2), the bottom of the guide pipe (604) faces the guide block (603), and the driving wheel (605) is fixedly connected to the surface of the first connecting rod (602).

4. The apparatus for preparing a high-etch-corrosion-resistant electrophoretic paint of claim 2, wherein: The flow mechanism (8) includes a third connecting rod (801), a second driven gear (802), a second bevel gear (803), a first partition (804), a second tooth (805) and a second partition (806), the bottom of the control box (5) is rotatably connected with the third connecting rod (801), one end of the third connecting rod (801) is fixedly connected with the second driven gear (802), the other end of the third connecting rod (801) is fixedly connected with the second bevel gear (803), the bottom of the blending bin (2) is rotatably connected with the first partition (804), the edge of the first partition (804) is annularly and equidistantly connected with a plurality of groups of second teeth (805), the second teeth (805) and the second bevel gear (803) are meshed with each other, and the bottom inner wall of the blending bin (2) is fixedly connected with the second partition (806), and the interiors of the first partition (804) and the second partition (806) are both provided with holes.

5. The apparatus for preparing a high-edge corrosion-resistant electrophoretic paint according to claim 1, characterized by: The output end of the first motor (9) is fixedly connected with a stirring rod (10) in the stirring drum (1), and the outer side of the stirring rod (10) is provided with a connecting plate (12) in the blending bin (2).

6. The high-edge corrosion-resistant electrophoretic paint preparation device according to claim 5, characterized by: The outer side of the stirring rod (10) is fixedly connected with a connecting ring (11), the outer side of the connecting ring (11) is fixedly connected with two groups of connecting plates (12), and the bottom of the connecting plate (12) is fixedly connected with a scraper (13).

7. The apparatus for preparing a high-etch- resistance electrophoretic paint of claim 3, wherein: The material guiding block (603) is half spherical and the other half is conical.

8. The apparatus for preparing a high-etch- corrosion- resistance electrophoretic paint according to claim 4, characterized by: The sizes of the first driven gear (702), the driving wheel (605) and the second driven gear (802) increase in turn.

9. The high-edge corrosion-resistant electrophoretic paint preparation device according to claim 6, characterized by: The bottom of the scraper (13) is attached to the first partition (804), and the cross section of the scraper (13) is isosceles trapezoidal.

10. A process for the preparation of high edge corrosion resistant electrophoretic paint characterized by: The method comprises the following steps: S1, synthesis of microgel 1.1 Preparation of microgel intermediate After the epoxy resin is chain-extended with bisphenol A under the action of a catalyst, a small molecule amine and a large amount of ketone imine BS-1023M-73 resin are added, the resin is grafted into a resin containing a large amount of primary amine, and then a proper amount of acetic acid is added for acidification and emulsification to obtain the intermediate needed by us; 1.2 Synthesis of microgel The microgel intermediate is loaded into a four-necked flask, a proper amount of 128 epoxy resin is added, and the temperature is raised to 85℃, and the temperature is kept for 2-4 hours. During the process, a large amount of pure water needs to be added. After the viscosity of the resin increases, the resin is constantly diluted with pure water to prevent the resin from being glued due to too high viscosity. After cooling, the microgel additive needed by us is obtained; S2, adding microgel to emulsion Synthesis process: A. After the epoxy resin modified by bisphenol A is diluted by a solvent, the amine is reacted, and the temperature is controlled at about 100℃, and the reaction is carried out for 2 hours; B. Add crosslinking agent after cooling; C. Add various additives; D. Add acid water to acidify the amine-modified epoxy resin; E. Add pure water for emulsification, and then add the microgel resin synthesized before; S3, influence of different microgel addition amounts on the performance of paint film 3.1 When the amount of microgel added to the emulsion is 3%, the paint film leveling is acceptable, and the orange peel effect is good; 3.2 Effect on salt spray corrosion performance of corner When the amount of microgel added to the emulsion is 4%, the salt spray is the best, but considering that the leveling of the paint film is poor at this time, the second choice of 3% dosage is selected as the final formulation of the amount of addition.

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