WO2008089609A1 - Electro-phoretic paingting method and integrated equipment for strip of sheet - Google Patents

Abstract

A electro-phoretic painting method and integrated equipment for strip of sheet are disclosed. The method involves cathodic or anodic electrophoresis process, and the strip of sheet is horizontally or vertically passed through the bath solution of the electrophoresis cell. The present invention can throughly solve the problem on treating strips of metal sheets (such as steel sheet, Al sheet and Cu sheet etc. ) and the other conductive strips which are obtained by specifically processing the non-conductive strips, and it can achieve an anticorrosion effect by painting the surfaces of those materials in an electro-phoretic process.

Description

 Electrophoretic coating technology method and complete equipment for coil material

 The invention relates to a method and a device for electrophoretic coating of materials, in particular to a coil material (such as a steel plate, an aluminum plate and the like, and a non-metal coil material but specially processed to become an electric conductor). Coil coating technology and complete equipment.

Background technique

 Since the development of the electrophoretic coating technology in the 1960s and its industrial application, its excellent high corrosion resistance, water-based environmental protection, high throughput, high coulombic efficiency, insoluble coating, stable bath, automation High, continuous production and other advantages, in the automotive industry, motorcycle industry, household appliances, instrumentation, military building materials, decorative hair accessories, glasses locks, hardware and light industry, daily necessities and other industries have been widely used, 巳 gradually replaced the conventional surface Painting technology, and become one of the most important painting techniques in the world today.

 At present, electrophoretic coating technology mainly processes electrophoresis of workpieces with simple and easy-to-paint workpieces, but due to the influence of baking of electrophoretic coatings, materials for coiled sheets (such as steel plates, aluminum plates, copper plates and other metal conductor coils) The anti-corrosion treatment of materials and non-metal coil materials but various types of coils which have been specially treated to become electrical conductors cannot be treated by conventional electrophoresis techniques, and other treatment methods in the prior art cannot solve such materials well. Electrophoresis and its surface anti-corrosion problems.

Summary of the invention

 The object of the present invention is to provide an electrophoretic coating of a coil material (such as a metal coil material such as a steel plate or an aluminum plate and a non-metal coil material but specially processed into a conductive material) in view of the defects of the prior art. Technology and complete sets of equipment, it completely solves the technical problems of electrophoretic coating of coiled materials, so that the above materials meet the anti-corrosion requirements.

 Another object of the present invention is to provide an apparatus for electrophoretic coating of a coil material. The object of the present invention is achieved by the following technical solutions: it adopts a cathodic electrophoresis process or an anodic electrophoresis process, and specifically includes the following steps:

 (1) The coil material is connected to the conductive device as a cathode or anode system, the conductive device is connected to the negative electrode or the positive electrode of the electrophoresis power source; and the anode or cathode of the electrophoresis device is connected to the positive or negative electrode of the power source.

Recognize As an anode or cathode system;

 (2) passing the workpiece of the coil material in parallel or longitudinally through the electrophoretic paint solution of the electrophoresis tank;

(3) turning on the electrophoresis power source for electrophoresis;

 (4) After the workpiece of the coil material leaves the electrophoresis tank, rinse the surface of the workpiece with water and rinse off the surface floating paint;

 (5) The workpiece of the coil material is baked in parallel or longitudinally into the oven to make the electrophoretic paint film level and solidify;

 (6) After the workpiece of the coil material leaves the oven, it is forced to cool and dry with cold air, and then the package is packaged.

 The coil material described therein is a coil material which is specially treated to become a conductor of metal or non-metal.

 The coil material described therein is an iron plate, a steel plate, a copper plate, a zinc plate or an aluminum plate.

 The coil material described therein is a fiberboard or a plastic board.

 The electrophoretic coating used in the electrophoresis process comprises polybutadiene resin, phenolic resin, epoxy resin, acrylic acid or polyurethane.

 The electrophoretic coatings used in the electrophoresis process include colorless and transparent, 3⁄4 light colorless or various color coatings, as well as flashing colors, pearlescent colors, and electrophoretic coatings with dyes or pigments.

 The electrophoretic coating described therein is added with a filler and an auxiliary agent for enhancing the performance of the electrophoretic coating. The electrophoretic coating used in the electrophoresis process comprises a thermosetting or photosensitive electrophoretic coating. The material of the anode plate used in the cathodic electrophoresis process or the material of the cathode plate used in the anodic electrophoresis process is stainless steel, iron, aluminum, copper or non-metal material metallized conductive conductive member, the shape of which is Plate system, tubular system or bare plate.

 The electrophoretic coating apparatus of the present invention comprises a unwinder and a winder, and an electrophoresis device is disposed between the unwinder and the winder. The electrophoresis tank device comprises an electrophoresis main tank and an electrophoresis storage tank, and a front end of the electrophoresis main tank is provided with a conductive device, and the conductive device is connected with the coil material.

The electrophoresis tank device can adopt two forms: the first one is that the electrophoresis main tank is placed inside the electrophoresis storage tank, and is a large trough sleeve shape, and the electrophoresis main tank has parallel or longitudinal slots, which can Through the coil material, the upper and lower sides of the parallel slot or the left and right sides of the longitudinal slot have an anode or cathode system, and the parallel slot or the longitudinal slot is provided with a deflector on both sides, and the function of the drain plate will flow out from the slot The electrophoretic paint is hooked down to the next electrophoresis Storage tank. The power pump installed on the electrophoresis storage tank is connected to the electrophoresis main tank through a conveying pipe, and an overflow pipe is arranged on the electrophoresis main tank, and the overflow pipe is connected with the electrophoresis storage tank. The excess electrophoretic paint in the main electrophoresis tank overflows into the electrophoresis reservoir through the overflow tube. This forms a closed loop system.

 The second type is that the electrophoresis main tank and the electrophoresis storage tank are separated and independent, adopting a double-slot or multi-slot structure, and the electrophoresis main tank has parallel or longitudinal slots, which can pass through the coil material, parallel to the upper surface of the slot There are anode or cathode systems on the left and right sides of the lower or longitudinal slots, and a drainage plate is arranged on both sides of the parallel slot or the longitudinal slot. A collecting slot is provided under the electrophoresis main slot in the direction in which the coil material passes, and the small slot is collected. The volume can be large or small, and the electrophoretic paint that can flow out of the slot can be collected and transported to the electrophoresis storage tank. The collection trough is equipped with a pipeline connected to the electrophoresis storage tank. The power pump installed on the electrophoresis storage tank is connected to the electrophoresis main tank through the transport tube, and the electrophoresis main tank is provided with an overflow tube, and the overflow tube is connected with the electrophoresis storage tank. The excess electrophoretic paint in the main electrophoresis tank overflows into the electrophoresis reservoir through the overflow tube. This forms a closed loop system.

 A flattening machine, a positioning machine, a pretreatment machine, a water washing machine and a baking machine are arranged between the unwinder and the winder.

 The invention can open a plurality of parallel slots or longitudinal slots in the electrophoresis main groove, and install a plurality of parallel or longitudinal plate systems, so that a plurality of coil materials can be simultaneously electrophoresed.

 The invention completely solves the coil material (such as steel plate, aluminum plate, copper plate and other metal conductor coil material and non-metal coil material but special treatment into various types of coils of electrical conductor) and non-metal special treatment The electrophoresis treatment of the coiled sheet of the conductor makes the surface of the above material anticorrosive by electrophoretic coating.

DRAWINGS

 Figure 1 is a process flow and equipment layout diagram of the present invention

 2 is a process flow and equipment layout diagram of another embodiment of the present invention

 Figure 3 is a structural diagram of an electrophoresis device of the present invention

 4 is a view showing another embodiment of an electrophoresis apparatus according to the present invention;

 FIG. 5 is still another embodiment of the electrophoresis device device of the present invention;

 6 is a view showing still another embodiment of the electrophoresis device device of the present invention;

detailed description

The present invention will be further described below in conjunction with the embodiments - The electrophoretic coating complete equipment of the present invention comprises a unwinder 1 and a winder 2, and an electrophoresis device is arranged between the unwinder 1 and the winder 2. The electrophoresis tank device can take two forms:

 As shown in FIG. 3, the first type is that the electrophoresis main tank 3 is placed inside the electrophoresis storage tank 4, which is in the shape of a large trough sleeve, and the electrophoresis main tank 3 has a horizontal slot 5, which can pass through the coil material. An anode or cathode system 6 is disposed above and below the parallel slot 5, and a parallel plate 5 is provided on both sides of the parallel slot 5, and the draining plate 7 functions to uniformly drain the electrophoretic paint flowing out of the slot 5 to the lower electrophoresis storage. Slot 4. The power circulation pump 8 mounted on the electrophoresis storage tank 4 is connected to the electrophoresis main tank 3 through a transport pipe 9, and the electrophoresis main tank 3 is provided with an overflow pipe 10, and the overflow pipe 10 is connected to the electrophoresis storage tank 4. The electrophoretic main tank 3 excess electrophoretic paint is then overflowed through the overflow tube 10 to the electrophoresis storage tank 4. This forms a closed loop system. As shown in Fig. 4, the present invention can also adopt a longitudinal slot, and the anode or cathode system 6 is also disposed longitudinally when a longitudinal slot is used.

 As shown in FIG. 5, the second type is that the electrophoresis main tank 3 and the electrophoresis storage tank 4 are separated and independent, and adopts a double-slot or multi-slot structure, and the horizontal slot 5 on the electrophoresis main tank 3 can pass through the coil. The material has an anode or cathode system 6 above and below the horizontal slot 5, and a drainage plate 7 is arranged on both sides of the horizontal slot. A collecting slot 11 is provided under the electrophoresis main slot in the direction in which the coil material passes, and the small slot 11 is collected. The volume can be large or small, and the electrophoretic paint that can flow out of the slot can be collected and transported to the electrophoresis storage tank. The collecting trough is provided with a pipe 12, and the pipe 12 is connected to the electrophoresis storage tank 4. The power circulation pump 8 installed on the electrophoresis storage tank 4 is connected to the electrophoresis main tank 3 through the conveying pipe 9, and the electrophoresis main tank 3 is provided with an overflow pipe 10, The overflow pipe 10 is connected to the electrophoresis storage tank 4. The electrophoretic main tank 3 excess electrophoretic paint is then overflowed through the overflow tube 10 to the electrophoresis storage tank 4. This forms a closed loop system. As shown in Fig. 6, the utility model can also adopt a longitudinal slot, and the anode or cathode system 6 is also longitudinally disposed when a longitudinal slot is used.

 A flattening machine 14, a positioning machine 15, a front processing machine 16, a water washing machine 17, and a baking machine 18 are provided between the unwinding machine 1 and the winder 2. A conductive device 13 is mounted in front of the slot of the electrophoresis main tank 3.

 The method of the invention can be implemented by the following embodiments:

Example 1: In the case of planar transverse cathodic electrophoresis - The coil material workpiece 19 is an electrophoretic member, which is a cathode system, and is connected to a negative electrode (-) of the electrophoresis source through a conductive device 13. The anode system is connected to the positive (+) power supply. The anode is a fixed connection, and the cathode is crimped or clamped with a resilient metal material, but does not affect the continuous movement of the workpiece. As shown in Figure 1: The coil material workpiece 19 is passed through the electrophoretic paint solution of the electrophoresis main tank 4 in parallel, and the workpiece of the coil material is passed through two parallel slots of the electrophoresis main tank to start moving the power supply to make the coil The workpiece moves in parallel; when the workpiece of the coil material passes through the leveling machine, the workpiece is leveled evenly by leveling, and the workpiece is conveyed in the next process. When the workpiece of the coil material passes through the positioning machine 15, the workpiece is moved up and down by positioning, and the workpiece is conveyed in the next process after positioning. When the coil material workpiece 19 passes through the pretreatment machine 16, different treatment methods can be adopted according to different coil materials. At the same time, different treatment methods can be adopted according to the degree of surface contamination of different materials.

 A. The pre-treatment method can be degreasing and degreasing treatment: If the coil material has no other performance requirements, it can be degreased and degreased only to make the surface clean, and the workpiece can be transported in the next process.

 B. The pre-treatment method can be electroplating treatment: If the coil material has other performance requirements, the surface can be plated differently according to requirements, and the surface can be plated with different metal layers, and then the workpiece can be transported in the next process. Such as galvanized coil plates.

 C. The pretreatment method can be phosphating: If the coil material has other performance requirements, the surface can be phosphatized according to requirements, and the surface can be obtained with different phosphating layers, and then transported to the next process. Workpiece. Such as coiled iron sheet and so on.

 D. The pretreatment method can be oxidation treatment: If the coil material has other performance requirements, the surface can be oxidized differently according to the requirements, and the surface can be obtained with different oxide layers, and then the workpiece can be transported in the next process. Such as rolled aluminum sheet and so on.

 When the workpiece of the coil material passes through the washing machine, the surface of the workpiece is cleaned with tap water or purified water, the liquid and impurities brought out by the previous process are cleaned, the surface of the workpiece is cleaned, and then the workpiece is conveyed in the next process.

The power circulation pump 8 is started, the electrophoretic paint of the electrophoresis storage tank 4 is twitched, and the workpiece is completely immersed in the electrophoretic paint. At the same time, the main channel of the electrophoresis has an overflow port on the anode system, and the excess electrophoretic paint can be discharged from the overflow port. The pipeline flows out and flows into the electrophoresis storage tank to prevent the full circulation of the power circulation pump due to excessive delivery. This overflow line is open to the side or other Position, but can not affect the electrophoresis process, as long as it does not cause full tank phenomenon and can continuously supply electrophoretic coating, so that the electrophoresis workpiece can be fully immersed in the electrophoretic paint. The electrophoresis power source is turned on for electrophoresis. After the workpiece leaves the electrophoresis tank, rinse the surface of the workpiece with ultra-filtered water or pure water to rinse off the surface float paint. The workpiece of the coil material is baked in parallel into the baking machine 18, and the electrophoretic paint film is leveled and solidified. After the workpiece of the coil material is removed from the oven, it is forced to cool with cold air. After the coil material is cooled and dried, it can be packaged in rolls.

 The apparatus of the present invention can simultaneously electrophoreize single-roll and multi-rolled coil materials. The thickness of the electrophoretic paint film can be guaranteed by controlling the voltage and time and other conditions.

 Example 2: In the case of a planar lateral anodic electrophoresis process:

 The workpiece of the coil material is an electrophoresis member, which is an anode system and is connected to the positive electrode (+) of the electrophoresis source. The cathode system is connected to the negative (-) power supply. The cathode is a fixed connection, and the anode is crimped or clamped with a resilient metal material, but does not affect the continuous movement of the workpiece. The workpiece of the coil material is passed through the electrophoretic paint solution of the electrophoresis tank, and the workpiece of the coil material is passed through two parallel slots of the electrophoresis tank. Start moving the power supply and let the coil workpiece move in parallel. Rolling material workpiece When the leveling machine is passed, the workpiece is leveled evenly by leveling, and the workpiece is conveyed in the next process. When the workpiece of the coil material passes through the positioning machine, the workpiece is moved up and down by positioning, and the workpiece is conveyed in the next process after positioning. When the workpiece of the coil material passes through the pretreatment machine, different treatment methods can be adopted according to different coil materials. At the same time, different treatment methods can be adopted according to the degree of surface contamination of different materials. The pretreatment method is the same as that of the first embodiment.

 Start the power circulation pump and twitch the electrophoretic paint of the electrophoresis storage tank so that the workpiece is completely immersed in the electrophoretic paint. At the same time, the main channel of the electrophoresis has an overflow port on the upper part of the anode system, and the excess electrophoretic paint can flow out from the overflow port and flow into the electrophoresis storage tank to prevent the large amount of the power pump from being delivered. phenomenon. The overflow pipe is open to the side or other position, but it does not affect the electrophoresis process. As long as the full tank is not caused and the electrophoretic coating can be continuously supplied, the electrophoresis workpiece can be completely immersed in the electrophoretic paint. The electrophoresis power source is turned on for electrophoresis. After leaving the electrophoresis tank, the workpiece of the coil material is washed with ultrafiltration water or pure water to rinse off the surface of the workpiece. The coil material is baked in parallel into the baking machine 18, and the electrophoretic paint film is leveled and solidified. After the coil material workpiece leaves the oven, it is forced to cool with cold air. 19 materials for coiling materials. After cooling and drying, they can be packaged in rolls.

Embodiment 3: When the vertical cathodic electrophoresis process is erected: the workpiece of the coil material is an electrophoresis member, For the cathode system, connect the negative electrode (-) of the electrophoresis source. The anode system is connected to the positive pole of the power supply ( + ). The anode is a fixed connection, and the cathode is crimped or clamped with a resilient metal material, but does not affect the continuous movement of the workpiece. As shown in FIG. 2, the workpiece of the coil material is vertically erected through the electrophoretic paint solution of the electrophoresis tank, and the workpiece of the coil material is passed through two vertical longitudinal slots of the electrophoresis tank. Move the conveyor power supply to move the coiled workpiece upright. When the workpiece of the coil material passes through the leveling machine, the workpiece is leveled evenly by leveling, and the workpiece is conveyed in the next process. When the workpiece of the coil material passes through the positioning machine, the workpiece is moved up and down by positioning, and the workpiece is conveyed in the next process after positioning. When the workpiece of the coil material passes through the pretreatment machine, different treatment methods can be adopted according to different coil materials. At the same time, different treatment methods can be adopted according to the degree of surface contamination of different materials. The pretreatment method is the same as that of the first embodiment.

 The power circulation pump 8 is started, the electrophoresis paint of the electrophoresis storage tank is twitched, and the workpiece is completely immersed in the electrophoretic paint. At the same time, the main channel of the electrophoresis has an overflow port on the cathode system, and the excess electrophoretic paint can be discharged from the overflow pipe. The road flows out and flows into the electrophoresis storage tank to prevent the tank from being over-sized due to excessive power transmission. The overflow pipe is open to the side or other position, but it cannot affect the electrophoresis process. As long as the full-slot phenomenon is not caused and the electrophoretic coating can be continuously supplied, the electrophoresis workpiece can be completely immersed in the electrophoretic paint. The electrophoresis power source is turned on for electrophoresis. After the workpiece leaves the electrophoresis tank, rinse the surface of the workpiece with ultra-filtered water or pure water to rinse off the surface varnish. The workpiece of the coil material is longitudinally baked into the baking machine 18 to be baked, and the electrophoretic paint film is leveled and solidified. After the workpiece of the coil material is removed from the oven, it is forced to cool with cold air. After the sheet material is cooled, it can be packaged in rolls.

 Example 4: When erecting the longitudinal anodic electrophoresis process:

The workpiece of the coil material is an electrophoresis member, which is an anode system, and is connected to the positive electrode (+) of the electrophoresis source. The cathode system is connected to the negative (-) power supply. The cathode is a fixed connection, and the anode is crimped or clamped with a resilient metal material, but does not affect the continuous movement of the workpiece. As shown in FIG. 4: The workpiece of the coil material is erected longitudinally through the electrophoretic paint solution of the electrophoresis tank, and the workpiece of the coil material is passed through two vertical longitudinal slots of the electrophoresis tank. Start moving the power supply and let the coiled workpiece move vertically. When the workpiece of the coil material passes through the leveling machine, the workpiece is leveled evenly by leveling, and the workpiece is conveyed in the next process. When the workpiece of the coil material passes through the positioning machine, the workpiece is moved up and down by positioning, and the workpiece is conveyed in the next process after positioning. When the workpiece of the coil material passes through the pretreatment machine, different treatment methods can be adopted according to different coil materials. Meanwhile also Different treatment methods can be adopted according to the degree of surface contamination of different materials. The pretreatment method is the same as that of the first embodiment.

 The power circulation pump is started, the electrophoresis paint of the electrophoresis storage tank is twitched, and the workpiece is completely immersed in the electrophoretic paint. At the same time, the main channel of the electrophoresis has an overflow port on the cathode system, and the excess electrophoretic paint can be drained from the overflow port. It flows out and flows into the electrophoresis storage tank to prevent the tank from being over-sized due to excessive power transmission. The overflow pipe is open to the side or other position, but it does not affect the electrophoresis process. As long as the full tank is not caused and the electrophoretic coating can be continuously supplied, the electrophoresis workpiece can be completely immersed in the electrophoretic paint. The electrophoresis power source is turned on for electrophoresis. After the workpiece leaves the electrophoresis tank, rinse the surface of the workpiece with ultra-filtered water or pure water to rinse off the surface varnish. The workpiece of the coil material is longitudinally baked into the baking machine 18 to be baked, and the electrophoretic paint film is leveled and solidified. After the workpiece of the coil material is removed from the oven, it is forced to cool with cold air. After the sheet material is cooled, it can be packaged in rolls.

 The above-mentioned embodiments are intended to be illustrative of the invention, and are not intended to limit the scope of the invention, and any modifications and changes may be made without departing from the scope of the invention.

Claims

Claim  1. A method for electrophoretic coating of a coil material, which adopts a cathodic electrophoresis process or an anodic electrophoresis process, and specifically comprises the following steps:  (1) connecting the coil material and the conductive device as a cathode or anode system, the conductive device is connected to the negative electrode or the positive electrode of the electrophoresis power source; the anode or the cathode of the electrophoresis device is connected to the positive electrode or the negative electrode of the power source as an anode or a cathode system;  (2) passing the workpiece of the coil material in parallel or longitudinally through the electrophoretic paint solution of the electrophoresis tank; (3) Turn on the electrophoresis power supply for electrophoresis;  (4) After the workpiece of the coil material leaves the electrophoresis tank, rinse the surface of the workpiece with water and rinse off the surface floating paint;  (5) The workpiece of the coil material is baked in parallel or longitudinally into the oven to make the electrophoretic paint film level and solidify;  (6) After the workpiece of the coiled material leaves the oven, it is forced to cool with cold air, dried, and then packed into a roll.  2. The method of electrophoretic coating of a coil material according to claim 1, wherein the coil material is a coil material which is treated to become a conductor by metal or nonmetal.  3. The electrophoretic coating technique of the coil material according to claim 1 or 2, wherein the coil material is iron plate, steel plate, copper plate, zinc plate or aluminum plate.  4. The method of electrophoretic coating of a coil material according to claim 1 or 2, wherein the coil material is a fiberboard or a plastic sheet.  5. The electrophoretic coating method of the coil material according to claim 1, wherein the electrophoretic coating used in the electrophoresis process comprises a polybutadiene resin, a phenol resin, an epoxy resin, an acrylic acid or a polyurethane.  6. The electrophoretic coating method of the coil material according to claim 1 or 5, wherein the electrophoretic coating used in the electrophoresis process comprises colorless transparent, matte colorless or various color paints, and glitter color and pearl light. Color and electrophoretic coatings with dyes or pigments added.  7. The electrophoretic coating method according to claim 1 or 5, wherein the electrophoretic coating is provided with a filler and an auxiliary agent for enhancing the performance of the electrophoretic coating. 8. The electrophoretic coating technique of the coil material according to claim 1 or 5, The electrophoretic coating used in the electrophoresis process comprises a thermosetting or photosensitive electrophoretic coating.  9. The electrophoretic coating method according to claim 1, wherein the material of the anode plate used in the cathodic electrophoresis process or the material of the cathode plate used in the anodic electrophoresis process is stainless steel, iron, aluminum. Pieces, copper or non-metallic materials metallize the electrically conductive conductor members in the form of plate systems, tubular systems or bare plates.  10. An electrophoretic coating apparatus for a coil material, comprising a unwinder and a winder, wherein: an electrophoresis device is disposed between the unwinder and the winder.  11. The electrophoretic coating device of the coil material according to claim 10, wherein the electrophoresis device comprises an electrophoresis main tank and an electrophoresis storage tank, and the electrophoresis main tank front end is provided with a conductive device, the conductive device and the coil. Board material connection.  The apparatus for electrophoretic coating of a coil material according to claim 10 or 11, wherein: the electrophoresis main tank is placed inside the electrophoresis storage tank, and is in the shape of a large trough sleeve, and is electrophoresed on the main tank. There are parallel or longitudinal slots, which can pass through the coil material, the upper and lower sides of the parallel slot or the left and right sides of the longitudinal slot have an anode or cathode system, and the parallel slot or the longitudinal slot is provided with a drainage plate on both sides, and the electrophoresis storage The power pump installed in the tank is connected to the electrophoresis main tank through a conveying pipe, and an overflow pipe is arranged on the electrophoresis main tank, and the overflow pipe is connected with the electrophoresis storage tank.  The electrophoretic coating equipment for a coil material according to claim 10 or 11, wherein the electrophoresis main tank and the electrophoresis storage tank are separate structures, and the double-slot or multi-slot structure is used for electrophoresis. The main groove has parallel or longitudinal slots, which can pass through the coil material, the upper and lower sides of the parallel slot or the left and right sides of the longitudinal slot have an anode or cathode system, and the parallel slot or the longitudinal slot is provided with a deflector A collecting small groove is arranged under the main electrophoresis groove in the direction of the coil material passing through, and a collecting pipe is arranged on the small groove, and the pipe is connected with the electrophoresis storage tank, and the power pump installed on the electrophoresis storage tank is connected to the electrophoresis main tank through the conveying pipe, and electrophoresis The main tank is provided with an overflow pipe, and the overflow pipe is connected with the electrophoresis storage tank.  The electrophoretic coating equipment for a coil material according to claim 10 or 11, wherein the unwinder and the winder are provided with a flattening machine, a positioning machine, a pretreatment machine, and a water washing machine. Machine and baking machine.