CN210121543U

CN210121543U - No floating color three-roller roll coater

Info

Publication number: CN210121543U
Application number: CN201920553734.0U
Authority: CN
Inventors: 李舒军; 付强; 邹炎斌; 赵秀娟
Original assignee: Qingdao River Steel Composite New Mstar Technology Ltd; Hefei River Steel New Mstar Technology Ltd
Current assignee: Qingdao River Steel Composite New Mstar Technology Ltd; Hefei River Steel New Mstar Technology Ltd
Priority date: 2019-04-18
Filing date: 2019-04-18
Publication date: 2020-03-03
Anticipated expiration: 2029-04-18

Abstract

The utility model relates to a color plate processing technology field discloses a there is not flooding look three-roller coating machine, which comprises a frame, be equipped with in the frame and just scribble the subassembly and be used for the transmission roller of transmission, just scribble the subassembly including rotating the adjusting roller of connection in the frame, carry material roller and coating roll, still be equipped with the material loading subassembly in the frame, the material loading subassembly includes the support fixed with the frame, is fixed with the diaphragm that the slope set up on the support, and diaphragm upper surface middle part is fixed with the coating box, and the coating box bottom is equipped with the discharge gate, sets up the bar groove that supplies coating to pass on the diaphragm, is equipped with the filter in the coating box. According to the scheme, the coating box is used for pouring the coating between the adjusting roller and the material lifting roller from the upper side, so that the defects of floating color, color lines, particle lines and the like caused by tray type lower feeding are avoided; and the setting of filter filters the coating that gets into in the coating box to this impurity in eliminating the coating is to the influence of coating, and the even degree when guaranteeing coating to coat has improved processingquality and product percent of pass.

Description

No floating color three-roller roll coater

Technical Field

The utility model relates to a color plate processing technology field, in particular to no flooding look three-roller roll coater.

Background

In the field of household appliances, in order to improve the decorative effect, a decorative steel plate is generally added on the household appliances; nowadays, with the development of times, decorative steel plates are also diversified more and more, and colors are usually coated on the decorative steel plates to form color steel plates, color plates for short, and the color plates have light weight, attractive appearance and good corrosion resistance. The color plate is a product which is prepared by using a cold-rolled steel plate and a galvanized steel plate as substrates, performing surface pretreatment (degreasing, cleaning and chemical conversion treatment), continuously coating a coating (roll coating method), baking and cooling. The roll coater is a core device in a roll coating process, determines the thickness and uniformity of a coating on the surface of a material, has a great influence on the operation efficiency of a machine set, and is the most common and widely used coating device at present.

At present, chinese utility model patent that publication number is CN203917033U discloses a three-roller roll coater of two-sided coating roller, it includes front coating mechanism, back coating mechanism, backing roll and steering roll, front coating mechanism, back coating mechanism, backing roll and steering roll pass through the steel sheet and connect, front coating mechanism and back coating mechanism all include from the coating dish be stained with the area material roller of getting coating, with the coating on the area material roller scribble the roller on the steel sheet surface and control the area material roller and be stained with the measuring roller of getting coating thickness, measuring roller, area material roller and coating roll are respectively through independent motor control motion, be provided with the elevating gear who drives the lifting of coating dish below the coating dish, elevating gear still includes the lifter that is driven by the motor.

According to the technical scheme, the coating is dipped from a coating disc through a material carrying roller in the double-roller coating device, and then the coating is transferred to a coating roller, and the coating roller coats the coating on the surface of a steel plate to finish roller coating; however, the above scheme has the following defects: the mode of dipping the coating from the coating tray needs to put enough coating in the coating tray to submerge the bottom of the material-carrying roller, the coating positioned at the bottom of the coating tray is stored in the coating tray for a long time, the fluidity is poor, color paste is coagulated at the corners of the coating tray, the edges of the material-carrying roller and other places with low fluidity, the coagulated color paste is brought to a steel plate by the material-carrying roller, the defects of floating color, color lines, particle lines and the like are formed, the quality of the plate surface is seriously influenced, and the product percent of pass is reduced. Therefore, a three-roller coater without floating color is needed, which has the function of eliminating floating color and improves the quality of the board surface and the qualified rate of products.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a do not have floating color three-roller coating machine, have the function of eliminating the floating color, improve face quality and product percent of pass.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a there is not roller coat of flooding look machine, includes the frame, be equipped with in the frame and just scribble subassembly, back of the body and be used for the transmission roller of transmission steel sheet, just scribble the subassembly including rotating adjustment roller, lifting roll and the coating roll of connection in the frame in proper order, still be equipped with in the frame and throw coating to material loading subassembly between adjustment roller and the lifting roll, material loading subassembly include with the support that the frame is fixed, be fixed with the diaphragm that the slope set up on the support, diaphragm upper surface middle part is fixed with the coating box that has stored coating, the intercommunication has the inlet pipe on the coating box, the coating box bottom is equipped with the discharge gate, set up the bar groove that supplies the coating in the discharge gate to pass on the diaphragm, be equipped with the filter in the coating box.

By adopting the technical scheme, the coating is poured between the adjusting roller and the material lifting roller from the upper part by the coating box, so that a lower feeding mode in the prior art is changed, the defects of floating color, color lines, particle lines and the like caused by tray type lower feeding are avoided by adopting an upper feeding mode, and the processing quality and the product percent of pass are improved; and the setting of filter filters the coating that gets into in the coating box to this impurity in eliminating the coating is to the influence of coating, and the even degree when guaranteeing coating to coat has further improved the product percent of pass.

The utility model discloses further set up to, the cladding of inlet pipe tip has the one deck filter screen, be fixed with the rubber band on the filter screen, the confession has been seted up on the inlet pipe outer wall the ring channel of rubber band crimple.

By adopting the technical scheme, the end part of the feeding pipe is coated with the filter screen, and the filter screen preliminarily filters the coating in the feeding pipe so as to preliminarily eliminate the influence of impurities in the coating on the coating; and the rubber band and the annular groove are matched to ensure that the filter screen can be disassembled, so that the filter screen can be replaced or cleaned by operators at regular intervals, the service life of the filter screen is prolonged, and the filtering effect of the filter screen is maintained.

The utility model discloses further set up to, the slot has been seted up to coating cartridge one side, the filter with the slot cooperation of pegging graft, just the exerted edge of filter is upwards protruding.

Through adopting above-mentioned technical scheme, set up the flange so that operating personnel takes out the filter after processing is accomplished in order to wash or change to avoid the filter to hinder the coating entering because of blockking up after using for a long time, ensure the filter effect of filter.

The utility model discloses further set up to, be fixed with on the slot lateral wall with tight sealing strip is supported on the filter surface.

Through adopting above-mentioned technical scheme, utilize the gap between sealing strip shutoff filter and the slot to this avoids coating to leak to the coating box outside from the slot, thereby avoids the loss of coating, practices thrift the coating cost.

The utility model is further arranged that the rotation speed ratio between the adjusting roller and the material lifting roller is 0.3 to 0.9; the rotating speed ratio between the material lifting roller and the coating roller is 0.3-0.4.

When the rotating speed of the adjusting roller, namely the material lifting roller, is relatively small, the coating is not easy to disperse, and the aim of reducing the generation of floating color cannot be achieved; when the rotating speed of the adjusting roller, namely the material lifting roller, is relatively high, the coating is not easy to be brought to the coating roller, and the coating cannot be guaranteed. The material lifting roller is not beneficial to lifting materials by the material lifting roller when the rotating speed of the coating roller is smaller; when the rotating speed of the material lifting roller and the coating roller is higher, the material lifting roller cannot play a role in leveling the coating and is not beneficial to the surface control of the product; by adopting the technical scheme, the rotating speed ratio between the adjusting roller and the lifting roller is set to be 0.3-0.9, and the rotating speed ratio between the lifting roller and the coating roller is set to be 0.3-0.4, so that the processing quality of the product is improved.

The utility model discloses further set up to, the diaphragm is close to a side edge of coating roll is fixed with the guide plate, guide plate bottom edge slope to the adjusting roller.

Through adopting above-mentioned technical scheme, set up the coating that the guide plate of slope flows the discharge gate and guide to the adjusting roller on to this avoids coating directly to fall and splashes to lifting roller and coating roll and cause coating to distribute inhomogeneous, thereby the homogeneity when ensureing the coating of coating roll.

The utility model discloses further set up to, the subassembly is scribbled including fixing the dish is scribbled to the back in the frame, rotate in the frame be connected with be used for being stained with the back of the body scribble the interior coating take material roller and bottom of dish and take the back of the body scribble the roller of material roller conflict, the back is scribbled the roller top and is contradicted with the steel sheet back.

By adopting the technical scheme, the coating on the back of the steel plate is realized by utilizing the combination of the back coating disc, the material carrying roller and the back coating roller, so that the function of the roller coater is increased, the steel plate does not need to be coated after being turned, and the production efficiency is improved.

The utility model discloses further set up as, be equipped with drive assembly in the frame, drive assembly includes first motor and the second motor of fixing in the frame, be fixed with on the output shaft of first motor with the first driving gear of adjusting roll coaxial fixation, the material lifting roller with the coating roll tip is coaxial fixed with first driven gear, second driven gear respectively, first driven gear meshes with first driving gear, second driven gear all; a second driving gear coaxially fixed with the material carrying roller is fixed on an output shaft of the second motor, and a third driven gear meshed with the second driving gear is coaxially fixed at one end of the back coating roller.

Through adopting above-mentioned technical scheme, the setting is by first motor, first driving gear, second driven gear, third driven gear, second motor, second driving gear and the drive assembly that third driven gear constitutes for just scribbling the subassembly and back of the body scribble the subassembly and provide power to this ensures going on smoothly of coating work, accelerates production speed.

The utility model discloses further set up to, just scribble the subassembly with be equipped with tension adjusting part between the subassembly is scribbled to the back of the body, tension adjusting part is including seting up spout in the frame, it is connected with the slider to slide on the spout, be fixed with the cylinder in the frame, the piston rod of cylinder with surface fixing under the slider, it is connected with the tension roller to rotate between the slider, the tension roller bottom is contradicted with the steel sheet is positive.

Through adopting above-mentioned technical scheme, when the cylinder starts, promote the slider and reciprocate along the spout, the tension roll reciprocated thereupon this moment to this pressure of adjusting the tension roll to the steel sheet, the tension of change steel sheet in transmission process, make the steel sheet have sufficient tension so that the smooth of coating work goes on.

To sum up, the utility model discloses a beneficial technological effect does:

1. according to the scheme, the coating box is used for pouring the coating between the adjusting roller and the material lifting roller from the upper side, so that the defects of floating color, color lines, particle lines and the like caused by tray type lower feeding are avoided; the filter plate is arranged to filter the coating entering the coating box, so that the influence of impurities in the coating on the coating is eliminated, the uniformity of the coating is ensured, and the processing quality and the product percent of pass are improved;

2. according to the scheme, the end part of the feeding pipe is coated with the filter screen, and the filter screen preliminarily filters the coating in the feeding pipe so as to preliminarily eliminate the influence of impurities in the coating on the coating; the filter screen can be detached due to the matching of the rubber band and the annular groove, so that operators can replace or clean the filter screen regularly, the service life of the filter screen is prolonged, and the filtering effect of the filter screen is maintained;

3. the coating to the steel sheet back is realized to the combination of this scheme utilization back coating dish, area material roller and back coating roller to this has increased the function of roller coat machine, need not to coat again after the steel sheet upset, has improved production efficiency.

Drawings

FIG. 1 is a schematic view of the overall structure of the embodiment;

FIG. 2 is a schematic sectional view of the embodiment;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 4 is an exploded structure diagram of the feeding assembly in the embodiment.

In the figure: 1. a frame; 11. a lifting seat; 12. a vertical screw; 13. a handle; 14. a bearing seat; 2. a forward coating assembly; 21. a leveling roller; 22. a material lifting roller; 23. a coating roll; 24. a transfer roller; 25. a guide roller; 26. a tension adjustment assembly; 261. a chute; 262. a slider; 263. a cylinder; 264. a tension roller; 27. a back coating assembly; 271. back coating the disc; 272. a belt roll; 273. back coating roller; 3. a feeding assembly; 30. a support; 31. a transverse plate; 311. a circular hole; 312. a strip-shaped groove; 32. a paint cartridge; 321. a discharge port; 322. a slot; 323. a sealing strip; 33. angle iron; 34. a filter plate; 35. a baffle; 4. a feed pipe; 41. a filter screen; 42. a rubber band; 43. an annular groove; 5. a drive assembly; 51. a first motor; 52. a first drive gear; 53. a second driven gear; 54. a third driven gear; 55. a second motor; 56. a second driving gear; 57. a third driven gear; 6. recovering the tray; 61. a recovery pipe; 62. a squeegee; 63. a filler tube.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1, the three-roll coater without floating color comprises a frame 1, wherein the frame 1 is composed of two vertical rectangular plates, and a transmission roll 24 for transmitting a steel plate, a front coating assembly 2 for coating the front surface of the steel plate, a back coating assembly 27 for coating the back surface of the steel plate and a feeding assembly 3 for supplying coating are arranged on the frame 1. The transmission roller 24 is rotatably connected to the middle of the frame 1, and the front coating assembly 2 and the back coating assembly 27 are respectively arranged at two sides of the transmission roller 24.

As shown in fig. 2 and 3, the coating unit 2 includes a leveling roll 21, a lifting roll 22, and a coating roll 23. The adjusting roller 21 is located on one side of the frame 1 where the steel plate is fed, the lifting seats 11 are fixed on two sides of the frame 1, the bearing seats 14 are installed on the lifting seats 11, the bearing seats 14 are connected with the lifting seats 11 in a sliding mode through two guide rods, and two ends of the adjusting roller 21 are rotatably connected with the bearing seats 14. The middle part of the lifting seat 11 is provided with an opening, and a vertical screw 12 is arranged in the opening. The vertical screw 12 is vertically arranged, the middle part of the vertical screw is in threaded connection with the top of the lifting seat 11, the top part of the vertical screw is in rotary connection with the bottom of the bearing seat 14, and the bottom of the vertical screw is provided with a handle 13 convenient for an operator to rotate. When the vertical screw 12 rotates, the vertical screw 12 moves in the vertical direction, and the bearing seat 14 mounted at the top of the vertical screw 12 ascends and descends, so that the height of the adjusting roller 21 is adjusted, the distance between the adjusting roller 21 and the material lifting roller 22 is changed, and the purpose of adjusting the thickness of the coating is achieved.

The lifting roller 22 is positioned at one side of the adjusting roller 21 which is deviated to the back coating component 27, and two ends of the lifting roller are rotatably connected to the frame 1. The coating roller 23 is positioned between the lifting roller 22 and the transmission roller 24, and two ends of the coating roller are rotatably connected with the frame 1 and used for coating the coating on the lifting roller 22 to the front surface of the steel plate. The lower side of the transmission roller 24 is provided with a guide roller 25, and two ends of the guide roller 25 are rotatably connected with the frame 1 to guide the transmission of the steel plate. In the embodiment, the rotation speed ratio between the adjusting roller 21 and the material lifting roller 22 is 0.3 to 0.9; the ratio of the rotation speed between the material lifting roll 22 and the coating roll 23 is 0.3 to 0.4.

As shown in fig. 3 and 4, the feeding assembly 3 (see fig. 1) includes a bracket 30, a cross plate 31, a paint cartridge 32, an angle iron 33, a filter plate 34, and a baffle 35. The bracket 30 is a rod-shaped structure and is inserted and matched on the top of the bearing seat 14. The transverse plate 31 is a rectangular plate-shaped structure, two ends of the transverse plate 31 are fixed to the top of the bracket 30, the transverse plate 31 is obliquely arranged, and the height of one side edge of the transverse plate 31 close to the adjusting roller 21 is lower. The paint cartridge 32 has a rectangular parallelepiped shape, is hollow, and has an opening on its upper surface for receiving paint, and the paint cartridge 32 is placed in the middle of the upper surface of the horizontal plate 31. A discharge hole 321 is arranged on one side of the paint box 32 facing the material lifting roller 22, and a strip-shaped groove 312 for paint to pass through is arranged on the transverse plate 31. The angle iron 33 is located between the cross plate 31 and the paint cartridge 32, and has an L-shaped cross section. The top surface of the angle iron 33 is horizontal and fixed with the paint cartridge 32, the side wall surface is vertical and is provided with a threaded hole, the inner wall of the strip-shaped groove 312 is also provided with a threaded hole, and the threaded hole can be matched with the screw thread, so that the angle iron 33 is fixed with the transverse plate 31.

The horizontal plate 31 is provided with round holes 311 uniformly distributed so that the coating splashed on the horizontal plate 31 can drop. The deflector 35 is fixed in the middle of one side edge of the transverse plate 31 facing the lifting roller 22, and the bottom of the deflector is inclined to the adjusting roller 21. The deflector 35 is used for guiding the coating flowing out from the discharge port 321 to the adjusting roller 21, so that the coating is prevented from directly falling down and splashing to the lifting roller 22 and the coating roller 23 to cause uneven distribution of the coating.

The frame 1 is further provided with a feed pipe 4, and one end of the feed pipe 4 extends into the paint cartridge 32 to feed the paint cartridge 32. The bottom of the feeding pipe 4 is coated with a layer of filter screen 41, the filter screen 41 is enclosed into a cylinder shape, a circle of rubber band 42 penetrates through the top of the filter screen 41, and the rubber band 42 has good elasticity. An annular groove 43 is formed in the outer wall of the feeding pipe 4, and the rubber band 42 is clamped in the annular groove 43 after being tightened, so that the filter screen 41 is fixed. The filter screen 41 is used for preliminarily filtering the paint in the feeding pipe 4, so that the influence of impurities in the paint on the paint is preliminarily eliminated.

The filter plate 34 is a rectangular plate structure, and filter holes are uniformly distributed on the filter plate. The side wall of the paint cartridge 32 opposite to the adjusting roller 21 is provided with a slot 322, and the filter plate 34 is inserted and matched with the slot 322. The side wall of the slot 322 is fixed with a sealing strip 323 which is tightly pressed against the surface of the filter plate 34, so as to seal the gap between the filter plate 34 and the slot 322, and prevent the paint from leaking from the slot 322 to the outside of the paint box 32. The side edge of the filter panel 34 that is exposed outside the paint cartridge 32 is raised upwardly so that the operator can remove the filter panel 34 for cleaning or replacement after the process is completed.

As shown in fig. 1, the back coating assembly 27 includes a back coating pan 271, a take-up roll 272, and a back coating roll 273. The back coating disc 271 is fixed on one side of the frame 1 far away from the front coating assembly 2, and a filling pipe 63 for filling the frame 1 with coating is arranged on the frame 1. Referring to FIG. 3, the cross-section of the bottom of the back coating plate 271 is V-shaped, so as to reduce the amount of coating used in a single process. The belt material roller 272 is located on the upper side of the back coating disc 271, and two ends of the belt material roller are rotatably connected to the machine frame 1. The backing roll 273 is positioned above the side of the take-up roll 272 facing the front coating module 2 and is rotatably connected at both ends to the frame 1. The bottom of the back coating disc 271 is also communicated with a return pipe for recovering the coating in the back coating disc 271 after the steel plate is processed.

As shown in fig. 1 and 3, the frame 1 is further provided with a driving assembly 5, and the driving assembly 5 includes a first motor 51, a first driving gear 52, a second driven gear 53, a third driven gear 5754, a second motor 55, a second driving gear 56, and a third driven gear 5754. The first motor 51 is fixed on one side of the frame 1 close to the adjusting roller 21, and the output shaft thereof is fixed with the first driving gear 52 and the adjusting roller 21; the first driven gear is positioned between the rack 1 and the lifting roller 22 and is coaxially fixed with the lifting roller 22; the second driven gear 53 is positioned between the machine frame 1 and the coating roller 23 and is coaxially fixed with the coating roller 23, and the first driven gear is meshed with the first driving gear 52 and the second driven gear 53. The second motor 55 is fixed on one side of the frame 1 close to the material carrying roller 272, and the output shaft thereof is fixed with the second driving gear 56 and the material carrying roller 272; a third driven gear 5754 is located between the back coating roller 273 and the frame 1 and fixed coaxially with the back coating roller 273, and the third driven gear 5754 is engaged with the second driving gear 56. The driving assembly 5 provides power to the front coating assembly 2 and the back coating assembly 27, thereby ensuring smooth coating work.

As shown in fig. 1, the frame 1 is further provided with a tension adjusting assembly 26, and the tension adjusting assembly 26 is located between the back coating assembly 27 and the front coating assembly 2 and includes a chute 261, a slider 262, an air cylinder 263 and a tension roller 264. The sliding groove 261 is provided on the frame 1, and the extending direction thereof coincides with the height direction of the frame 1. The sliding block 262 is connected with the sliding groove 261 in a sliding mode, the air cylinder 263 is fixed with the frame 1, and the piston rod of the air cylinder 263 is fixed with the bottom of the sliding block 262. The tension roller 264 is rotatably connected between the sliding blocks 262 at both sides of the frame 1, and the bottom thereof is abutted against the front surface of the steel plate. When the cylinder 263 is started, the cylinder 263 pushes the slider 262 to move up and down along the chute 261, and at the same time, the tension roller 264 moves up and down along with the slider, and the pressure of the tension roller 264 on the steel plate is changed along with the slider, so that the tension of the steel plate in the transmission process is changed, and the steel plate has enough tension to smoothly perform the coating work.

As shown in fig. 2, the frame 1 is further provided with a recovery tray 6, the recovery tray 6 is positioned at the lower side of the front coating assembly 2, and two ends of the recovery tray 6 are fixed with the frame 1. The recycling tray 6 is used for receiving the coating dropped from the lifting roller 22, the adjusting roller 21 and the coating roller 23, and the bottom of the recycling tray is funnel-shaped and communicated with a recycling pipe 61, so that the recycling of the coating is convenient. A scraper 62 is fixed on the inner side wall of the recovery tray 6, and the top of the scraper 62 is abutted against the bottom of the coating roller 23, so that the residual coating material coated by the coating roller 23 is scraped off, and the uniformity of the coating material on the coating roller 23 is further ensured.

In the embodiment, when the steel plate enters from the side of the frame 1 provided with the feeding assembly 3, the steel plate is conveyed to a position between the conveying roller 24 and the front coating assembly 2 through the turning direction of the guide roller 25, at the moment, the coating in the feeding pipe 4 falls into the coating box 32 and flows into a position between the adjusting roller 21 and the lifting roller 22 through the discharge port 321 of the coating box 32, the adjusting roller 21 and the lifting roller 22 uniformly extrude the coating, and then the steel plate is rotated to the coating roller 23, and the coating roller 23 coats the coating on the front surface of the steel plate; the steel plate passes through the tension roller 264 and then is conveyed to the back coating assembly 27, at the moment, the material carrying roller 272 transfers the coating to the back coating roller 273, and the back coating roller 273 coats the coating on the back of the steel plate, so that the coating work of the two sides of the steel plate is completed.

In the embodiment, the coating box 32 is used for pouring the coating between the adjusting roller 21 and the lifting roller 22 from the upper part, so that the lower feeding mode in the prior art is changed, the defects of floating color, color lines, particle lines and the like caused by recovery tray type lower feeding are avoided by adopting the upper feeding mode, and the processing quality and the product yield are improved; and the filter 34 filters the coating entering the coating box 32, so as to eliminate the influence of impurities in the coating on the coating, ensure the uniformity of the coating, and further improve the product yield.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a there is not flooding look three-roller coating machine, includes frame (1), be equipped with on frame (1) and just scribble subassembly (2), back of the body and scribble transmission roller (24) of subassembly (27) and be used for transmitting the steel sheet, just scribble subassembly (2) including rotate adjusting roller (21), the material lifting roller (22) and the coating roller (23) of connection in frame (1) in proper order, still be equipped with on frame (1) and throw coating to material loading subassembly (3) between adjusting roller (21) and material lifting roller (22), characterized by: the feeding assembly (3) comprises a bracket (30) fixed with the rack (1), a transverse plate (31) obliquely arranged is fixed on the bracket (30), a coating box (32) storing coating is fixed in the middle of the upper surface of the transverse plate (31), a feeding pipe (4) is communicated with the coating box (32), a discharging hole (321) is formed in the bottom of the coating box (32), a strip-shaped groove (312) for the coating in the discharging hole (321) to pass through is formed in the transverse plate (31), and a filtering plate (34) is arranged in the coating box (32).

2. The machine of claim 1, wherein the roll coater is characterized in that: the utility model discloses a rubber band, including inlet pipe (4), inlet pipe (4) tip cladding has one deck filter screen (41), be fixed with rubber band (42) on filter screen (41), seted up the confession on inlet pipe (4) outer wall rubber band (42) ring channel (43) that tighten up.

3. The machine of claim 1, wherein the roll coater is characterized in that: a slot (322) is formed in one side of the paint box (32), the filter plate (34) is matched with the slot (322) in an inserted mode, and the exposed edge of the filter plate (34) protrudes upwards.

4. The non-flooding three-roll coater of claim 3 wherein: and a sealing strip (323) which is tightly abutted against the surface of the filter plate (34) is fixed on the side wall of the slot (322).

5. The machine of claim 1, wherein the roll coater is characterized in that: the rotating speed ratio between the adjusting roller (21) and the material lifting roller (22) is 0.3-0.9; the rotating speed ratio between the material lifting roller (22) and the coating roller (23) is 0.3-0.4.

6. The machine of claim 1, wherein the roll coater is characterized in that: a guide plate (35) is fixed on the edge of one side of the transverse plate (31) close to the coating roller (23), and the edge of the bottom of the guide plate (35) inclines to the adjusting roller (21).

7. The machine of claim 1, wherein the roll coater is characterized in that: the back coating assembly (27) comprises a fixed back coating disc (271) on the machine frame (1), a material carrying roller (272) for dipping the inner coating of the back coating disc (271) and a back coating roller (273) with the bottom abutting against the material carrying roller (272) are rotatably connected to the machine frame (1), and the top of the back coating roller (273) abuts against the back of a steel plate.

8. The machine of claim 7 wherein: a driving assembly (5) is arranged on the rack (1), the driving assembly (5) comprises a first motor (51) and a second motor (55) which are fixed on the rack (1), a first driving gear (52) which is coaxially fixed with the adjusting roller (21) is fixed on an output shaft of the first motor (51), a first driven gear and a second driven gear (53) are respectively and coaxially fixed at the end parts of the material lifting roller (22) and the coating roller (23), and the first driven gear is meshed with the first driving gear (52) and the second driven gear (53); a second driving gear (56) coaxially fixed with the material carrying roller (272) is fixed on an output shaft of the second motor (55), and third driven gears (57) (54) meshed with the second driving gear (56) are coaxially fixed at one end of the back coating roller (273).

9. The machine of claim 1, wherein the roll coater is characterized in that: just scribble subassembly (2) with be equipped with tension adjusting part (26) between back of the body coating subassembly (27), tension adjusting part (26) is including offering spout (261) on frame (1), it is connected with slider (262) to slide on spout (261), be fixed with cylinder (263) on frame (1), the piston rod of cylinder (263) with slider (262) lower fixed surface, it is connected with tension roller (264) to rotate between slider (262), tension roller (264) bottom is openly contradicted with the steel sheet.