A production line and method for continuous and intermittent production of powder coated steel sheet rolls and sheets.

Abstract

This invention relates to the field of powder-coated steel sheet production technology, and in particular to a production line and method for continuous and intermittent production of powder-coated steel sheet rolls and flat sheets. The production line is sequentially equipped with an uncoiler, sheet storage and conveying equipment, a leveling device, a sheet surface pretreatment device, a powder coating device, a coating curing device, a curing air-cooling device, and loading and unloading equipment along its working direction. This production line for continuous and intermittent production of powder-coated steel sheet rolls and flat sheets allows for flexible switching between continuous and intermittent production modes for pre-coated metal rolls and flat sheets. It satisfies both continuous roll production and intermittent flat sheet production, reducing secondary investment in equipment and production lines, avoiding secondary transportation for roll cutting and processing, lowering procurement and transportation costs, avoiding stockpiled surplus materials from customized production, and allowing for flexible adjustment of the powder-coated steel sheet production mode.

Description

Technical Field

[0001] This invention relates to the field of color-coated steel sheet production technology, specifically a production line and method for continuous and intermittent production of powder-coated steel sheet rolls and flat sheets. Background Technology

[0002] Powder coated steel sheets are a type of material that uses electrostatic spraying technology to uniformly spray powder coatings onto metal sheets, forming coatings with different colors, effects, and textures. Compared with traditional spray painting technology, powder coating has higher coating efficiency and quality, and does not produce harmful gases such as volatile organic compounds (VOCs), therefore it is widely used in industrial, construction, and home furnishing fields.

[0003] In recent years, with the implementation of relevant national environmental protection policies and regulations, the limits on the content of volatile organic compounds (VOCs) and other harmful substances in industrial protective coatings have become increasingly stringent. Therefore, low-VOC and environmentally friendly powder-coated steel sheet products have become the future development trend of the steel sheet industry.

[0004] Currently, most powder-coated steel sheet production lines utilize continuous powder coating of metal coils for continuous production. The production line typically includes: ① Uncoiling → ② Riveting → ③ Inlet looper → ④ Pre-treatment → ⑤ Electrostatic powder coating → ⑥ Curing → ⑦ Water-cooled drying → ⑧ Outlet looper → ⑨ Inspection → ⑩ Winding → Packaging. While powder-coated steel sheets offer a wide variety of colors, textures, and finishes, including matte, glossy, sandblasted, metallic shimmer, chameleon, and wood grain effects, and can also provide high-temperature resistance, antibacterial properties, flame retardancy, and self-cleaning capabilities, current production lines face challenges. The diverse and volatile market demands often lead to the cutting of entire rolls, resulting in scattered material accumulation. Furthermore, continuous production lines for powder-coated steel sheets also experience intermittent coating changes, generating significant amounts of waste material and scattered material accumulation during start-up and shutdown. Currently, there is no production line that can simultaneously produce powder-coated steel sheets in both continuous roll and intermittent flat sheet production, so as to balance the continuous production of powder-coated steel sheets in rolls and the intermittent production of powder-coated steel sheets in small quantities and with a variety of products. Summary of the Invention

[0005] To achieve both continuous production of powder-coated sheet rolls and intermittent production of powder-coated sheet in small quantities and on flatbeds, this invention provides a production line that can be used for both continuous and intermittent production of powder-coated sheet rolls. This production line allows for flexible switching between continuous and intermittent production modes for pre-coated metal rolls of powder-coated sheet, satisfying both continuous roll production and intermittent flatbed production. This reduces secondary investment in equipment and production lines, avoids secondary transportation for external processing of roll cutting, lowers procurement and transportation costs, prevents stockpiling of surplus materials from customized production, and allows for flexible adjustment of the powder-coated sheet production mode.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A production line and method for continuous and intermittent production of powder-coated steel sheet coils are disclosed. The production line for continuous and intermittent production of powder-coated steel sheet coils adopts the following configuration: along the working direction of the production line, an uncoiler, hydraulic shears, a sewing machine, sheet storage and conveying equipment, a vacuum suction cup feeder, a leveling device, sheet surface pretreatment equipment, powder coating equipment, coating curing equipment, curing air-cooling device, and loading and unloading equipment are arranged in sequence. The sheet storage and conveying equipment includes a clamping machine, a tensioner, an inlet looper, an outlet looper, a deviation correction machine, and a conveyor belt arranged in sequence. The sheet surface pretreatment equipment includes a degreasing device, a passivation machine, a degreasing oven, and a passivation oven.

[0008] The continuous production mode and intermittent production mode of the powder-coated sheet pre-coated metal coil are equipped with shared equipment and sorting equipment. The shared equipment includes an uncoiler, a clamping machine, a conveyor belt, a degreasing machine, a passivation machine, a coating machine, an oven, a powder spraying machine, a coating curing machine, and an air cooling device. The sorting equipment includes a sewing machine, a tensioning machine, a web guiding machine, a side guide, a hydraulic shear, a vacuum suction cup feeding machine, a leveling device, a vacuum suction cup unloading machine, and a winding machine.

[0009] The leveling device in the splitting line equipment includes a leveling machine and an electric shearing machine arranged in sequence. Along the working direction of intermittent production of the powder-coated steel sheet, downstream of the leveling device of the splitting line equipment are a vacuum suction cup feeder, a conveyor belt, a side guide, a degreasing device, a degreasing oven, a degreasing air-cooling device, a passivation machine, a passivation oven, a powder spraying device, a coating curing device, an air-cooling device, and a full vacuum suction cup unloading machine. Along the working direction of continuous production of the powder-coated steel sheet roll, downstream of the sewing machine of the splitting line equipment are a tension machine, an inlet looper, a web guiding machine, a degreasing device, a passivation machine, a passivation oven, a powder spraying device, a coating curing device, an air-cooling device, an outlet looper, and a winding machine.

[0010] The uncoiler includes uncoiler #1 and uncoiler #2; the sewing machine includes sewing machine #1 and sewing machine #2; the web guiding machine includes web guiding machine #1 and web guiding machine #2; the tensioning machine includes tensioning machine #1, tensioning machine #2, tensioning machine #3 and tensioning machine #4; the drying oven includes a degreasing drying oven and a passivation drying oven; the hydraulic shear includes an inlet hydraulic shear and an outlet hydraulic shear; the air cooling device includes a degreasing air cooling device and a curing air cooling device. The web guiding machine, tensioning machine and hydraulic shear are all part of the continuous production setup for powder coated steel sheet rolls.

[0011] The production method for powder-coated steel sheet rolls that can be used for both continuous and intermittent production of flat sheets includes the following steps:

[0012] In the continuous production mode of powder coated steel sheet rolls, the rolls pass through an uncoiler, hydraulic shear, sewing machine, sheet storage and conveying equipment, sheet surface pretreatment equipment, powder spraying equipment, coating curing equipment, curing air cooling device, and loading and unloading equipment in sequence. The hydraulic shear and sewing machine stitch the adjacent metal rolls on uncoiler #1 and uncoiler #2 into one piece.

[0013] In the intermittent production mode of powder coated steel sheets, the coil material passes through an uncoiler, hydraulic shear, sewing machine, sheet material storage and conveying equipment, vacuum suction cup feeder, leveling device, sheet material surface pretreatment equipment, powder spraying equipment, coating curing equipment, curing air cooling device, and loading and unloading equipment in sequence. The leveling device can cut the metal coil material into sheets; or, the cut metal sheets can be directly fed into the production process by the vacuum suction cup feeder.

[0014] When switching from continuous production mode to intermittent production mode for powder coated steel sheet rolls, the production roll material is first fed to uncoiler #2. While waiting for the guide belt on uncoiler #1 to reach near the end of its length, the inlet hydraulic shear cuts the guide belt. The guide belt is then sewn together with the beginning of the production roll conveyed by uncoiler #2 at sewing machine #1. The roll continues to be conveyed in the production direction, reaching a leveling machine where it is leveled and cut to length. Afterward, it is cut into flat sheets of the required size by an electric shearing machine. The cut flat sheets continue to be conveyed in the flat sheet production direction for the intermittent flat sheet production process. The guide belt then stops at sewing machine #2. After the production, palletizing, and packaging are completed, the original feeder belt is transferred to the No. 2 uncoiler. While waiting for the production roll on the No. 1 uncoiler to reach the end of the belt, the inlet hydraulic shear cuts the production roll on the No. 1 uncoiler and sews it to the feeder belt head on the No. 2 uncoiler at the No. 1 seam. The roll is then conveyed in the direction of roll production. When the feeder belt reaches the No. 2 seamr, it is sewn to the feeder belt that was originally stopped at the No. 2 seamr. In this way, the intermittent production mode of powder coated steel sheet flat sheets is switched to the continuous production mode of powder coated steel sheet rolls, thus realizing continuous production of rolls.

[0015] The side guides are respectively located upstream of the degreasing equipment, upstream of the powder coating equipment, and upstream of the coating equipment. They are used for positioning the sheet material in the width direction, guiding it to be conveyed by the downstream equipment, and preventing the sheet material from deviating.

[0016] The electric shearing machine includes a blade holder, a mechanical transmission, and shearing blades. The mechanical transmission device is located at the bottom of the blade holder, and the shearing blades are spaced apart vertically from the blade holder. The shearing blades are fixed to the blade holder and reciprocate. A leveling machine is provided between the electric shearing machine and the clamping machine. The leveling machine consists of a feeding traction roller, upper and lower leveling roller groups, upper and lower support rollers, a frame, an upper row roller pressing adjustment device, and a transmission system. The upper row of leveling rollers is mounted on a movable slider and the upper row of rollers presses down to level the material. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of a production line for both continuous and intermittent production of powder-coated steel sheet rolls as described in this invention.

[0019] Figure 2 This is a structural diagram of a leveling machine.

[0020] Figure 3 This is a schematic diagram of an electric shearing machine.

[0021] Explanation of reference numerals in the attached drawings: 1.1# uncoiler, 2.2# uncoiler, 3. clamping machine, 4. inlet hydraulic shear, 5.1# sewing machine, 6.1# tension machine, 7. inlet looper, 8. web guiding machine, 9.2# tension machine, 10. leveling machine, 11. electric shearing machine, 12. vacuum suction cup loading machine, 13. side guide, 14. degreasing equipment, 15. degreasing oven, 16. degreasing air cooling, 17. passivation machine, 18. passivation oven, 19. powder coating equipment, 20. coating curing equipment, 21. curing air cooling device, 22. vacuum suction cup unloading machine, 23.2# sewing machine, 24.3# tension machine, 25. outlet looper, 26.4# tension machine, 27. outlet hydraulic shear, 28. winding machine, 29. laminating equipment, 30. conveyor belt.

[0022] 1001. Frame; 1002. Feed traction roller; 1003. Lower row leveling roller assembly; 1004. Upper row leveling roller assembly; 1005. Lower row support roller assembly; 1006. Upper row support roller assembly; 1007. Upper row roller pressing adjustment device; 1008. Transmission system; 1009. Movable slider; 1101. Shearing blade; 1102. Fixed blade holder; 1103. Mechanical transmission. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] A production line and method for continuous and intermittent production of powder-coated steel sheet rolls and flat sheets are disclosed. Along the working direction of the production line, the following components are sequentially arranged: an uncoiler, a hydraulic shear, a sewing machine, a sheet storage and conveying device, a vacuum suction cup feeder 12, a leveling device, a sheet surface pretreatment device, a powder coating device 19, a coating curing device 20, a curing air-cooling device 21, and loading and unloading equipment. The sheet storage and conveying device includes a clamping machine, a tensioner, an inlet looper 7, an outlet looper 25, a deviation correction machine 8, and a conveyor belt 30, arranged sequentially. The sheet surface pretreatment device includes a degreasing device 14, a passivation machine 17, a degreasing oven 15, and a passivation oven 18. Figure 1 As shown.

[0025] The production line, which can be used for both continuous and intermittent production of powder-coated sheet rolls, can flexibly switch between continuous and intermittent production modes for pre-coated metal rolls of powder-coated sheet. It can meet both continuous production of powder-coated sheet rolls and intermittent production of powder-coated sheet flat panels, reduce secondary investment in equipment production lines, avoid secondary transportation of roll cutting and processing, reduce procurement and transportation costs, avoid the accumulation of surplus materials from customized production, and flexibly adjust the production mode of powder-coated sheet.

[0026] In this embodiment, the continuous production mode and the intermittent production mode of powder-coated sheet pre-coated metal coil are equipped with shared equipment and sorting equipment. The shared equipment includes an uncoiler, a clamping machine 3, a conveyor belt 30, a degreasing device 14, a passivation machine 17, a coating device 29, an oven, a powder spraying device 19, a coating curing device 20, and an air cooling device. The sorting equipment includes a sewing machine, a tensioning machine, a web guiding machine 8, a side guide 13, a hydraulic shear, a vacuum suction cup loading machine 12, a leveling device, a vacuum suction cup unloading machine 22, and a winding machine 28. The shared equipment and sorting equipment mentioned above can all be existing technology products.

[0027] Side guides 13 are respectively located upstream of the degreasing equipment 14, upstream of the powder coating equipment 19, and upstream of the coating equipment 29. They are used for positioning the sheet in the width direction, guiding and aligning it for downstream equipment conveying, and preventing the sheet from deviating.

[0028] In this embodiment, the uncoiler includes 1# uncoiler 1 and 2# uncoiler 2, the sewing machine includes 1# sewing machine 5 and 2# sewing machine 23, the web guiding machine 8 includes 1# web guiding machine and 2# web guiding machine, the tension machine includes 1# tension machine 6, 2# tension machine 9, 3# tension machine 24 and 4# tension machine 26, the drying oven includes degreasing drying oven 15 and passivation drying oven 18, the hydraulic shear includes inlet hydraulic shear 4 and outlet hydraulic shear 27, and the air cooling device includes degreasing air cooling device 16 and curing air cooling device 21. The web guiding machine, tension machine and hydraulic shear are all set up for continuous production of powder coated steel sheet rolls.

[0029] In this embodiment, as Figure 3 As shown, the electric shearing machine 11 includes a blade holder 1102, a mechanical transmission 1103, and shearing blades 1102. The mechanical transmission 1103 is located at the bottom of the blade holder 1102. The shearing blades 1101 and the blade holder 1102 are spaced vertically apart, and the shearing blades 1102 are fixed to the blade holder 1101 to perform reciprocating motion. A leveling machine 10 is provided between the electric shearing machine 11 and the clamping machine 3, such as... Figure 2 As shown, the leveling machine 10 consists of a feeding traction roller 1002, upper and lower leveling roller groups 1003, upper and lower support rollers, a frame 1001, an upper row roller pressing adjustment device 1007, a transmission system 1008, etc. The upper row leveling roller 1006 is installed on the movable slider 1009 (crossbeam) and the plate is leveled by pressing down the upper row roller.

[0030] The following describes a production method for both continuous and intermittent production of powder-coated steel coils and flat sheets. The method utilizes the aforementioned production line for both continuous and intermittent production of powder-coated steel coils and flat sheets. The production method for both continuous and intermittent production of powder-coated steel coils and flat sheets includes the following steps:

[0031] In the continuous production mode of powder-coated steel sheet rolls, the rolls are sequentially passed through an uncoiler, hydraulic shear, sewing machine, sheet storage and conveying equipment, sheet surface pretreatment equipment, powder spraying equipment 19, coating curing equipment 20, curing air cooling device 21, and loading and unloading equipment. The hydraulic shear and sewing machine stitch adjacent metal rolls on uncoiler 1 and uncoiler 2 into one piece.

[0032] In the intermittent production mode of powder coated steel sheet, the roll material passes through an uncoiler, hydraulic shear, sewing machine, sheet material storage and conveying equipment, vacuum suction cup feeder 12, leveling device, sheet material surface pretreatment equipment, powder spraying equipment 19, coating curing equipment 20, curing air cooling device 21, and loading and unloading equipment in sequence. The leveling device can cut the metal roll material into a flat sheet; or, the cut metal flat sheet can be directly fed into the vacuum suction cup feeder 12 for production.

[0033] When switching from continuous production mode to intermittent production mode of powder coated steel sheet rolls, the electric shearing machine 11 cuts the metal roll and connects it to the guide belt. The guide belt is stored in the sheet storage and conveying equipment. During the process of switching from intermittent production mode of powder coated steel sheet rolls to continuous production mode of powder coated steel sheet rolls, the uncoiling machine guide belt and the guide belt stored in the sheet storage and conveying equipment are sewn together at the sewing machine.

[0034] The following is based on Figure 1 The working process of the production line shown is described in detail, which can be used for both continuous and intermittent production of powder-coated steel sheet rolls and flat sheets.

[0035] In the continuous production mode of powder coated steel sheet rolls, the leveling machine, slitting device, vacuum suction cup feeding machine and unloading machine are idle. The rolls are continuously produced by passing through the following machines in sequence: 1# uncoiler 1, clamping machine 3, 2# uncoiler 2, inlet hydraulic shear 4, 1# sewing machine 5, inlet looper 7, 1# alignment machine 8, 2# tension machine 9, side guide 13, degreasing equipment 14, degreasing oven 15, degreasing air cooling 16, passivation machine 17, passivation oven 18, powder spraying equipment 19, coating curing equipment 20, curing air cooling device 21, laminating equipment 29, 3# tension machine 24, outlet looper 25, 2# alignment machine 8, 4# tension machine 26, outlet hydraulic shear 27, and winding machine 28.

[0036] In the intermittent production mode of powder coated steel sheet, the first step is to cut and load the roll material into a flat sheet. The roll material sequentially passes through the following equipment: 1# uncoiler, 3# clamping machine, 2# uncoiler, 4# inlet hydraulic shear, 5# sewing machine, 7# looper, 8# straightening machine, 9# tension machine, 10# leveling machine, 11# electric shearing machine, 13# side guide, 14# degreasing equipment, 15# degreasing oven, 16# degreasing air cooler, 17# passivation machine, 18# passivation oven, 19# powder coating equipment, 20# coating curing equipment, 21# curing air cooler, 29# laminating equipment, and 22# vacuum suction cup unloading machine for intermittent processing. The first production method can handle whole rolls, half rolls, and loose lengths of steel and aluminum coil raw materials. The second method involves direct feeding of flat sheet materials. The flat sheet materials are sequentially fed through a vacuum suction cup feeder 12, a side guide 13, a degreasing device 14, a degreasing oven 15, a degreasing air cooler 16, a passivation machine 17, a passivation oven 18, a powder coating device 19, a coating curing device 20, a curing air cooler 21, a film coating device 29, and a vacuum suction cup unloading machine 22 for intermittent flat sheet production. This production method can directly feed pre-cut flat sheets for production, meeting the needs of customized production.

[0037] When switching from continuous production mode to intermittent production mode for powder coated steel sheet rolls, the production roll material is first fed to uncoiler #2. While waiting for the guide belt on uncoiler #1 to reach near the end of its conveyor belt, the inlet hydraulic shear #4 cuts the guide belt and sews it together with the beginning of the production roll conveyor on uncoiler #2 at sewing machine #1. The roll continues to be conveyed in the production direction, reaching leveler #10 where it is leveled and cut to length. Then, it is cut into flat sheets of the required size by electric shears #11. The cut flat sheets continue to be conveyed in the flat sheet production direction for the intermittent flat sheet production process. The guide belt is then at sewing machine #2. After the production, palletizing, and packaging are completed, the original guide belt is fed to 2# uncoiler 2. While waiting for the production roll on 1# uncoiler 1 to be conveyed to the end of the belt, the inlet hydraulic shear 4 cuts the production roll on 1# uncoiler 1 and sews it to the guide belt head on 2# uncoiler 2 at 1# seam 5. The roll is then conveyed in the direction of roll production. When the guide belt is conveyed to 2# sewing machine 23, it is sewn to the guide belt that was originally stopped at 2# sewing machine 23. Thus, the intermittent production mode of powder coated steel plate flat sheet is switched to the continuous production mode of powder coated steel plate roll, thereby realizing continuous production of roll.

[0038] The features of the production line and production method for continuous and intermittent production of powder-coated steel sheet rolls and flat sheets described in this invention are as follows: 1. The sheet material sewn together by the sewing machine enters the looper through the tensioner for continuous roll production; the flat sheets leveled and cut by the leveling device are kept in a horizontal conveying state by the conveyor belt for intermittent flat sheet production.

[0039] 2. A leveling device is installed at the outlet of the inlet plate storage and conveying equipment. When it is necessary to switch from continuous production mode of coil to intermittent production mode of flat plate, the leveling machine 10 and electric shear 11 in the leveling device cut the metal coil into flat plates, so that a section of the metal coil is retained as a guide belt in the inlet plate storage and conveying equipment and the outlet plate storage and conveying equipment. When switching from intermittent production mode of flat plate to continuous production mode of coil again, the guide belt stored in the plate storage and conveying equipment is sewn together with the next section of guide belt or steel coil or aluminum coil raw material at sewing machine 5 and sewing machine 23, which eliminates the trouble of re-threading steel coil or aluminum coil in the plate storage and conveying equipment when switching production modes.

[0040] 3. The inlet is equipped with double uncoilers (1# uncoiler 1 and 2# uncoiler 2) to facilitate the rapid switching between the guide belt and raw materials such as steel coils and aluminum coils. Sewing machines are set in front of the inlet and outlet plate storage and conveying equipment, respectively, to save continuous operation time of the coil and improve the continuous production efficiency of the coil.

[0041] In this invention, the material form and size of the sheet material used in the production line and production method for continuous and intermittent production of powder coated steel sheet coils can be flexibly adjusted. The material form of the sheet material is aluminum coil, steel coil, aluminum sheet, or steel sheet. For continuous production of coils, aluminum coil or steel coil is preferred, and for intermittent production of sheets, aluminum sheet or steel sheet is preferred.

[0042] The specific production mode selection is not limited to the above-mentioned sheet material forms; other sheet material options are also possible. Furthermore, the production mode can be selected based on the sheet material demand. For example, when the required sheet material length is less than 1000m, a flatbed intermittent production mode can be selected; when the required sheet material length is more than 1000m, a coil continuous production mode can be selected. The aluminum coil and steel coil production modes can also be selected based on the sheet material thickness. For example, if the steel coil or aluminum coil thickness is 0.2mm~1.2mm (greater than or equal to 0.2mm and less than or equal to 1.2mm), a coil continuous production mode can be selected; if the steel coil or aluminum coil thickness is 1.2mm~2.2mm (greater than 1.2mm and less than or equal to 2.2mm), a flatbed intermittent production mode can be selected.

[0043] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical features and technical solutions, and technical solutions in this invention can be freely combined and used.

Claims

1. A production method for powder-coated steel sheet rolls that can be used for both continuous and intermittent production of flat sheets, characterized in that, The production method for both continuous and intermittent production of powder-coated steel sheet rolls uses the following production line: Along the working direction of the production line, the following equipment is arranged in sequence: an uncoiler, hydraulic shears, a sewing machine, sheet material storage and conveying equipment, a vacuum suction cup feeder, a leveling device, sheet material surface pretreatment equipment, powder coating equipment, coating curing equipment, curing air-cooling device, and loading and unloading equipment; the sheet material storage and conveying equipment includes, in sequence, a clamping machine, a tensioner, an inlet looper, an outlet looper, a deviation corrector, and a conveyor belt; the sheet material surface pretreatment equipment includes a degreasing device, a passivation machine, a degreasing oven, and a passivation oven. The continuous production mode and the intermittent production mode of the powder-coated sheet pre-coated metal coil are equipped with shared equipment and sorting equipment. The shared equipment includes an uncoiler, a clamping machine, a conveyor belt, a degreasing machine, a passivation machine, a coating machine, an oven, a powder spraying machine, a coating curing machine, and an air cooling device. The sorting equipment includes a sewing machine, a tensioning machine, a web guiding machine, a side guide, a hydraulic shear, a vacuum suction cup feeding machine, a leveling device, a vacuum suction cup unloading machine, and a winding machine. The leveling device in the splitting line equipment includes a leveling machine and an electric shearing machine arranged in sequence. Along the working direction of intermittent production of powder-coated steel sheet flat plates, downstream of the leveling device of the splitting line equipment are a vacuum suction cup feeder, a conveyor belt, a side guide, a degreasing device, a degreasing oven, a degreasing air-cooling device, a passivation machine, a passivation oven, a powder spraying device, a coating curing device, an air-cooling device, and a full vacuum suction cup unloading machine. Along the working direction of continuous production of powder-coated steel sheet rolls, downstream of the sewing machine of the splitting line equipment are a tension machine, an inlet looper, a web guiding machine, a degreasing device, a passivation machine, a passivation oven, a powder spraying device, a coating curing device, an air-cooling device, an outlet looper, and a winding machine. The uncoiler includes uncoiler #1 and uncoiler #2; the sewing machine includes sewing machine #1 and sewing machine #2; the web guiding machine includes web guiding machine #1 and web guiding machine #2; the tensioning machine includes tensioning machine #1, tensioning machine #2, tensioning machine #3 and tensioning machine #4; the drying oven includes a degreasing drying oven and a passivation drying oven; the hydraulic shear includes an inlet hydraulic shear and an outlet hydraulic shear; the air cooling device includes a degreasing air cooling device and a curing air cooling device. The web guiding machine, tensioning machine and hydraulic shear are all part of the continuous production setup for powder coated steel sheet rolls. The production method for powder-coated steel sheet rolls that can be used for both continuous and intermittent production of flat sheets includes the following steps: In the continuous production mode of powder coated steel sheet rolls, the rolls are sequentially passed through an uncoiler, hydraulic shears, a sewing machine, a sheet storage and conveying equipment, a sheet surface pretreatment equipment, a powder spraying equipment, a coating curing equipment, a curing air cooling device, and a loading and unloading equipment. The hydraulic shears and sewing machine stitch adjacent metal rolls or guide strips on uncoiler #1 and uncoiler #2 into one piece. In the intermittent production mode of powder coated steel sheets, the coil material passes through an uncoiler, hydraulic shear, sewing machine, sheet material storage and conveying equipment, vacuum suction cup feeder, leveling device, sheet material surface pretreatment equipment, powder spraying equipment, coating curing equipment, curing air cooling device, and loading and unloading equipment in sequence. The leveling device can cut the metal coil material into sheets; or, the cut metal sheets can be directly fed into the production process by the vacuum suction cup feeder. When switching from continuous production mode to intermittent production mode for powder coated steel sheet rolls, the production roll material is first fed to uncoiler #2. While waiting for the guide belt on uncoiler #1 to reach near the end of its length, the inlet hydraulic shear cuts the guide belt. The guide belt is then sewn together with the beginning of the production roll conveyed by uncoiler #2 at sewing machine #1. The roll continues to be conveyed in the production direction, reaching a leveling machine where it is leveled and cut to length. Afterward, it is cut into flat sheets of the required size by an electric shearing machine. The cut flat sheets continue to be conveyed in the flat sheet production direction for the intermittent flat sheet production process. The guide belt then stops at sewing machine #2. After the production, palletizing, and packaging are completed, the original feeder belt is transferred to the No. 2 uncoiler. While waiting for the production roll on the No. 1 uncoiler to reach the end of the belt, the inlet hydraulic shear cuts the production roll on the No. 1 uncoiler and sews it to the feeder belt head on the No. 2 uncoiler at the No. 1 seam. The roll is then conveyed in the direction of roll production. When the feeder belt reaches the No. 2 seamr, it is sewn to the feeder belt that was originally stopped at the No. 2 seamr. In this way, the intermittent production mode of powder coated steel sheet flat sheets is switched to the continuous production mode of powder coated steel sheet rolls, thus realizing continuous production of rolls.

2. The production method for both continuous and intermittent production of powder-coated steel sheet rolls according to claim 1, characterized in that, The side guides are respectively located upstream of the degreasing equipment, upstream of the powder coating equipment, and upstream of the coating equipment. They are used for positioning the sheet material in the width direction, guiding it to be conveyed by the downstream equipment, and preventing the sheet material from deviating.

3. The production method for both continuous and intermittent production of powder-coated steel sheet rolls according to claim 1, characterized in that, The electric shearing machine includes a blade holder, a mechanical transmission, and shearing blades. The mechanical transmission device is located at the bottom of the blade holder, and the shearing blades are spaced apart vertically from the blade holder. The shearing blades are fixed to the blade holder and reciprocate. A leveling machine is provided between the electric shearing machine and the clamping machine. The leveling machine consists of a feeding traction roller, upper and lower leveling roller groups, upper and lower support rollers, a frame, an upper row roller pressing adjustment device, and a transmission system. The upper row of leveling rollers is mounted on a movable slider and the upper row of rollers presses down to level the material.

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