WO2021217715A1

WO2021217715A1 - Round pit texture surface tension-based leather roller coating device and roller coating method therefor

Info

Publication number: WO2021217715A1
Application number: PCT/CN2020/089699
Authority: WO
Inventors: 张华�; 高鹏; 朱钱威
Original assignee: 南通大学
Priority date: 2020-04-30
Filing date: 2020-05-12
Publication date: 2021-11-04
Also published as: CN111518970B; LU500096A1; LU500096B1; CN111518970A

Abstract

A round pit texture surface tension-based leather roller coating device and a roller coating method therefor. The leather roller coating device comprises a coating roller (1) provided on a rack (6), the coating roller (1) being cylindrical, and a plurality of rows of storage parts (11) being arranged on the outer surface of the coating roller (1) at equal intervals; a leather conveying mechanism (21) located below the coating roller (1) and used for conveying leather to be coated; and a leather leveling mechanism (4) and a feeding mechanism (3) arranged above the coating roller (1). The feeding mechanism (3) comprises a plurality of needle tubes (31), a coating pool (33), and a pressure pump (35). Precise, controllable and uniform coating of the coating on said leather can be realized by means of the storage parts (11) uniformly arranged on the coating roller (1) and the leather leveling mechanism (4), so that the waste of the coating is greatly reduced, and meanwhile, the situations of deformation, bulging and the like in the later use process are avoided.

Description

Leather roller coating device based on surface tension of round pit texture and its roller coating method

Technical field

The invention relates to the technical field of leather roller coating, in particular to a leather roller coating device based on the surface tension of a round pit texture and a roller coating method thereof.

Background technique

The main processes of the leather preparation and finishing stage include: drying, stretching, flattening, grinding, finishing and embossing, etc. The finishing process is to disperse film-forming agents, colorants, additives, etc. in water or organic solvents to form coatings , It is applied to the surface of the dry embryonic skin by scraping, spraying or roller coating, and after drying, it forms a uniform film on the surface of the skin; the finishing process can improve the performance of the skin, and it can also be flawed. Skin repair, improve the quality of the skin.

In recent years, the roller coating process has been widely used by more and more factories. However, the existing methods of applying paint on the circumferential surface of the coating roller cannot make the coating evenly stored on the surface of the coating roller. For example, using a scraper to apply paint on the surface of the coating roller, and it cannot be stored in the grooves on the surface of the coating roller. The amount of paint makes it impossible to evenly apply the paint on the leather. Uneven paint has an impact on the leather’s leather hardness, tensile properties and other parameters. The leather products are prone to deformation and bulging during subsequent use, and cause A certain degree of waste. Therefore, there is an urgent need for a roller coating method and device for accurately and uniformly applying paint on the leather surface.

Summary of the invention

In order to solve the above problems, the present invention provides a leather roller coating device based on the surface tension of a round pit texture and a roller coating method thereof. The uniform arrangement of the storage parts on the coating roller and the leather smoothing mechanism can realize the coating of the coating on the surface to be coated. Precise, controllable and uniform application on the leather greatly reduces the waste of paint and avoids deformation and bulging during later use.

In order to achieve the above objectives, a technical solution adopted by the present invention is:

A leather roller coating device based on the surface tension of a round pit texture, comprising: a coating roller arranged on a frame, the coating roller is cylindrical, and the outer surface of the coating roller is provided with a plurality of discharge parts at equal intervals Leather conveying mechanism, located below the coating roller, used for conveying the leather to be coated; leather smoothing mechanism, including a first smoothing roller and a second smoothing roller, the second smoothing roller is arranged on the leather conveying mechanism , The first smoothing roller is located above the second smoothing roller; and a feeding mechanism is arranged above the coating roller, and the feeding mechanism includes a plurality of needle tubes, paint pools, and pressure pumps arranged in rows One end of the needle tube is set above the coating roller, and the other end of the needle tube is connected to the paint pool through a needle tube connector; a flow limiting valve is set between the needle tube connector and the paint pool; the pressure A pump is connected to the paint tank, and the flow limiting valve and the pressure pump are used to control the discharge volume and discharge speed of the needle tube.

Further, each row of the storage portion is composed of a plurality of equally spaced circular pits, and the line of the center of the circular pits on each row of the storage portion is parallel to the axis of the coating roller; the number of the needle tubes There is a one-to-one correspondence with the number of the round pits and the position of the round pits on each row of the storage part.

Further, a first pipe and a second pipe are provided between the needle tube connector and the paint tank, one end of the first pipe is connected to the paint tank, and the other end of the first pipe passes through the flow limiter. The valve is connected to one end of the second pipe, and the other end of the second pipe is connected to the flow channel of the needle tube connector.

Further, the paint pool includes: a box body, which is arranged on the frame; a partition plate, which is arranged on the inner wall of the box body through a sliding connecting plate, and the partition plate divides the box body into an upper cavity The airbag mechanism is arranged in the upper cavity. The airbag mechanism includes a rubber airbag, an airbag mouth, and an airbag cavity. The airbag cavity is fixed on the inner wall of the box, and the rubber airbag passes The airbag mouth is connected with the pressure pump, one end of the airbag mouth is connected with the rubber airbag, and the other end of the airbag mouth passes through the airbag cavity and the top wall of the box body and the pressure pump Connected; the partition is provided with a guide post, the upper part of the rubber airbag abuts against the inner wall of the top surface of the airbag cavity, and the lower part of the rubber airbag abuts against the top surface of the guide post; the guide The column can slide up and down along the side wall of the airbag cavity; and a total valve is arranged on the box body. The total valve includes a plurality of gates, a rotating shaft, a hand wheel, and a gate limiting mechanism. The number of gates is equal to There is a one-to-one correspondence between the number of the needle tubes and the positions of the needle tubes. Each of the first pipes and the paint tank is connected with a gate, the gate is arranged on the rotating shaft, and the rotating shaft passes through The side wall of the box body is rotatably arranged on the box body, the hand wheel is connected to one end of the rotating shaft, the hand wheel is located outside the box body, and the gate limiting mechanism is arranged on the box body. On the outer wall of the body, it is used to control the opening and closing of the gate.

Further, it also includes a scraper, the scraper abuts against the side of the coating roller, and a cleaning mechanism, which is arranged on the frame, and the cleaning part is used to clean the leather conveying mechanism.

Further, the leather conveying mechanism includes a leather input mechanism, including a first conveyor belt, a first power roller, and two driven rollers, and the first conveyor belt is sleeved on the first power roller and the two driven rollers. And leather output mechanism, including a second conveyor belt, a pressure roller and a second power roller, the second conveyor belt is sleeved on the second smoothing roller, the pressure roller and the second power roller, so The coating roller is located above the pressure roller; the leather to be coated is finished in the process from the leather input mechanism to the leather output mechanism.

Further, the cleaning part includes a water spray pipe, a water tank and a wiper, the water spray pipe is arranged on the inner wall of the water tank, the bottom surface of the wiper board is arranged on the water tank, and the wiper blade The top surface abuts against the cleaning zone of the second conveyor belt, one side of the cleaning zone abuts on the second power roller, and the other surface of the cleaning zone abuts on the wiper plate.

Further, the restrictor valve includes: a restrictor valve chamber in which a small ball, a spring, a moving iron core and a static iron core are arranged, and the static iron core is arranged on the top of the restrictor valve chamber, the The moving iron core is located below the static iron core, and there is a certain gap between the moving iron core and the static iron core; one end of the spring is arranged at the bottom of the moving iron core, and the other end of the spring The small ball is provided, the small ball abuts against the entrance of the restrictor valve chamber, and the outer wall of the restrictor valve chamber corresponding to the static iron core is provided with a restrictor valve coil; the restrictor valve An inlet, one end is in communication with the first pipe, and the other end is in communication with the inlet of the restrictor valve chamber; and an outlet of the restrictor valve, one end is in communication with the second pipe, and the other end is in communication with the restrictor valve chamber The outlet is connected.

The present invention also provides a roller coating method of a leather roller coating device based on the surface tension of the round pit texture, which includes the following steps: S10 feeding, starting the pressure pump to pressurize the rubber airbag, and the rubber airbag inflates, The partition moves downward to squeeze the paint in the lower cavity, and then the main valve is opened, and the paint flows into the first pipe; S20 stores the material, controls the current of the current limiting valve coil to adjust the flow rate of the paint Fast or slow, the paint flows through the restrictor valve through the second pipe to the needle tube, and then the paint drops on the circle of each row of the storage part row by row at a certain dripping speed through the needle tube. In the pit; S30 finishing, when each row of the storage part is full of paint, start the leather conveying mechanism to start feeding the leather, and the leather is sent to the leather conveying mechanism after passing the coating roller coating Leather smoothing mechanism, the leather smoothing mechanism evenly spreads the coating of the leather and then transports it to the next processing process; and S40 the coating remaining on the surface of the second conveyor belt is transported to the conveyor belt along with the second conveyor belt The cleaning mechanism cleans up.

Further, the rotation speed of the coating roller is matched with the dripping speed of the needle tube, so that the dripping paint from the needle tube drips into the round pit of the storage part row by row.

Compared with the prior art, the above-mentioned technical solution of the present invention has the following advantages:

(1) A leather roller coating device based on the surface tension of round pit texture and its roller coating method of the present invention. The coating roller is provided with a storage part composed of a plurality of round pits of the same size. The material part is evenly distributed on the coating roller, and the amount of paint stored in each row of the material storage part is the same and uniform. At the same time, the invention also provides a leather leveling mechanism to make the paint evenly applied to the coating to be painted in a precise and controllable manner. The surface of the leather; it avoids the deformation and bulging of the leather in the subsequent use process.

(2) According to the present invention, a leather roller coating device based on the surface tension of a round pit texture and a roller coating method thereof can adjust the rotation speed of the coating roller to realize that the needle tube is a row of the storage part. After filling, the time for the next row of storage parts to rotate under the needle tube is exactly the same as the time for the next drop of the needle tube to prevent the paint from dripping outside the coating roller and ensure that all the storage parts can store Full material to ensure roller coating efficiency and prevent paint waste.

Description of the drawings

In the following, the specific embodiments of the present invention will be described in detail with reference to the accompanying drawings to make the technical solutions of the present invention and its beneficial effects obvious.

FIG. 1 shows a structural diagram of a leather roller coating device based on the surface tension of a round pit texture according to an embodiment of the present invention;

2 is a structural diagram of a leather roller coating device (removing frame) based on the surface tension of the round pit texture according to an embodiment of the present invention;

Fig. 3 is a cross-sectional view of the connecting head of the needle tube according to an embodiment of the present invention;

Figure 4 shows a cross-sectional view of a paint tank according to an embodiment of the present invention;

Figure 5 is a structural diagram of a restrictor valve according to an embodiment of the present invention;

FIG. 6 is a structural diagram of the position of the gate limiting mechanism according to an embodiment of the present invention;

FIG. 7 is a partial enlarged view of A in FIG. 2 according to an embodiment of the present invention;

Fig. 8 is a structural diagram of a cleaning part according to an embodiment of the present invention;

Fig. 9 is a flow chart of a roller coating method of a leather roller coating device based on the surface tension of a round pit texture according to an embodiment of the present invention.

The part numbers in the figure are as follows:

1 coating roller, 11 storage part, 111 round pit, 21 leather input mechanism, 211 first conveyor belt, 212 first power roller, 213 driven roller, 22 leather output mechanism, 221 second conveyor belt, 222 pressure roller, 223 second power roller, 224 cleaning area, 31 needle tube, 32 needle tube connector, 321 runner, 33 paint tank, 331 tank, 332 partition, 333 guide column, 334 sliding connection plate, 335 upper cavity, 336 lower Cavity, 337 sealing strip, 338 paint pool outlet, 34 airbag mechanism, 341 rubber airbag, 342 airbag nozzle, 343 airbag cavity, 35 pressure pump, 36 restrictor valve, 361 restrictor valve chamber, 362 ball, 363 spring , 364 moving iron core, 365 static iron core, 366 restrictor valve coil, 367 restrictor valve inlet, 368 restrictor valve outlet, 37 first pipeline, 38 second pipeline, 39 total valve, 391 gate, 392 shaft, 393 Handwheel, 394 gate limit mechanism, 395 locking bolt, 396 bolt bracket, 397 pit, 4 leather smoothing mechanism, 41 first smoothing roller, 42 second smoothing roller, 51 scraper, 52 cleaning part, 521 spray pipe , 522 sink, 523 wiper board, 6 racks.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

In this embodiment, a leather roller coating device and a roller coating method based on the surface tension of a round pit texture are provided, as shown in Figures 1 to 2, including: a coating roller 1, a leather conveying mechanism, and a leather smoothing mechanism 4. , Feeding mechanism, scraper and cleaning department.

The coating roller 1 is arranged on a frame 6, the coating roller 1 is cylindrical, and the outer surface of the coating roller 1 is provided with a plurality of discharge parts 11 at equal intervals. Each row of the storage portion 11 is composed of a plurality of equally spaced circular pits 111, and the line of the centers of the circular pits 111 on each row of the storage portion 11 is parallel to the axis of the coating roller 1.

The leather conveying mechanism is arranged on the frame 6, and the leather conveying mechanism is located under the coating roller 1 and is used for conveying the leather to be coated. The leather conveying mechanism includes a leather input mechanism 21 and a leather output mechanism 22. The leather input mechanism 21 includes a first conveyor belt 211, a first power roller 212 and two driven rollers 213, and the first conveyor belt 211 is sleeved on the first power roller 212 and the two driven rollers 213. The leather output mechanism 22 includes a second conveyor belt 221, a pressure roller 222, and a second power roller 223. The second conveyor belt 221 is sleeved on the second smoothing roller 42, the pressure roller 222, and the second power roller. On 223, the coating roller 1 is located above the pressure roller 222. The leather to be coated is input to the coating roller 1 through the leather input mechanism 21 for coating, and after the coating is completed, the leather output mechanism 22 outputs to the leather leveling mechanism 4 to complete the coating process.

The leather smoothing mechanism 4 is arranged on the frame 6, the leather smoothing mechanism 4 includes a first smoothing roller 41 and a second smoothing roller 42, the second smoothing roller 42 is arranged on the leather conveying mechanism 2 , The first smoothing roller 41 is located above the second smoothing roller 42.

The feeding mechanism is arranged above the coating roller 1, and the feeding mechanism 3 includes a plurality of needle tubes 31, a coating pool 33, and a pressure pump 35 arranged in rows. One end of the needle tube 31 is provided on the coating roller Above 1, the other end of the needle tube 31 is connected to the paint pool 33 through a needle tube connector 32, and a flow limiting valve 36 is provided between the needle tube connector 32 and the paint pool 33. The number of the needle tubes 31 corresponds to the number of the round pits 111 and the position of the round pits 111 on each row of the storage portion 11 in a one-to-one correspondence. It is ensured that one needle tube 31 supplies material to one round pit 111, and a row of needle tubes 31 simultaneously supplies material to a row of storage parts 11. The paint is stored in the pit 111 by surface tension. Adjust the rotation speed of the coating roller 1 so that the needle tube 31 is a row of the storage part 11 full of material, and the next row of the storage part 11 rotates to the needle tube 31 at exactly the same time as the needle tube 31. The time of the second drip is the same. It is ensured that all the storage parts 11 can be filled with material, and the paint does not fall outside the storage part 11 to prevent paint waste.

The diameter of the coating roller 1 is preferably 200-300mm, the rotation speed is 1-3r/min, the diameter of the round pit 111 is preferably 7-8mm, and the depth of the round pit 111 is preferably 2 to 2.5mm. The distance between two adjacent circular pits 111 in the material portion 11 is 3 to 4 mm. The surface of the coating roller 1 has 63-79 rows of the storage portion 11, and the needle tube 31 drops 63-237 drops of the paint per minute, for example, when the surface of the coating roller 1 has 63 rows of the storage portion 11 The needle tube 31 drops 63 drops per minute, so that the coating roller 1 rotates once, and the needle tube 31 just fills each of the pits 111 with paint. At this time, the feeding speed is preferably 0.63-2.83m/min.

The pressure pump 35 is connected to the paint tank 33, and the flow limiting valve 36 and the pressure pump 35 are used to control the discharge amount and the discharge speed of the needle tube 31, and a row of the storage section 11 is full After feeding, by rotating to the next row of the storage part 11, the flow limiting valve 36 controls the discharge amount and the discharge speed of the needle tube 31 to ensure that each row of the storage part 11 can be filled with paint. A first pipe 37 and a second pipe 38 are provided between the needle tube connector 32 and the paint tank 33, one end of the first pipe 37 is connected to the paint tank 33, and the other end of the first pipe 37 The restrictor valve 36 is connected to one end of the second pipe 38. As shown in FIG. 3, the other end of the second pipe 38 is connected to the flow channel 321 of the needle tube connector 32.

As shown in FIG. 4, the paint tank 33 includes a box body 331, a partition 332, an airbag mechanism 34 and a general valve 39. The box body 331 is arranged on the frame 6. The partition 332 is provided on the inner wall of the box body 331 through a sliding connection plate 334. The partition 332 divides the box body 331 into an upper cavity 335 and a lower cavity 336. The airbag mechanism 34 is arranged in the upper cavity 335, and the paint to be roll coated is placed in the lower cavity 336. The airbag mechanism 34 includes a rubber airbag 341, an airbag mouth 342 and an airbag cavity 343, and the airbag cavity 343 is fixed on the inner wall of the box body 331 to provide an accommodation space for the rubber airbag 341. The rubber airbag 341 is connected to the pressure pump 35 through the airbag mouth 342, one end of the airbag mouth 342 is connected to the rubber airbag 341, and the other end of the airbag mouth 342 passes through the airbag cavity 343 and The top wall of the box body 331 is connected to the pressure pump 35. The partition 332 is provided with a guide post 333, the upper part of the rubber airbag 341 abuts against the inner wall of the top surface of the airbag cavity 343, and the lower part of the rubber airbag 341 abuts against the top surface of the guide post 333 . The guide post 333 can slide up and down along the side wall of the airbag cavity 343. When the pressure pump 35 applies pressure to the rubber airbag 341, the rubber airbag 341 rapidly expands, pushing the guide post 333 to move downward, so that the partition 332 slides along the sliding connecting plate 334. When the partition 332 slides downward, the air pressure in the lower cavity 336 increases, thereby pushing the paint to be rolled in the lower cavity 336 into the first pipe 37. In order to prevent the partition 332 from leaking during the downward movement, a sealing strip 337 is provided at the connection between the sliding connecting plate 334 and the partition 332.

As shown in FIG. 5, the restrictor valve 36 includes a restrictor valve chamber 361, a restrictor valve inlet 367 and a restrictor valve outlet 368. A small ball 362, a spring 363, a moving iron core 364, and a static iron core 365 are arranged in the limiting valve chamber 361. The static iron core 365 is arranged on the top of the restricting valve chamber 361. The moving iron core 364 is located below the static iron core 365, and there is a certain gap between the moving iron core 364 and the static iron core 365. One end of the spring 363 is provided at the bottom of the moving iron core 364, and the other end of the spring 363 is provided with the small ball 362, which abuts against the entrance of the restrictor valve chamber 361 . The outer wall of the restrictor valve chamber 361 corresponding to the static iron core 365 is provided with a restrictor valve coil 366. One end of the restrictor valve inlet 367 is communicated with the first pipe 37, and the other end is communicated with the inlet of the restrictor valve chamber 361. One end of the restrictor valve outlet 368 is in communication with the second pipe 38, and the other end is in communication with the outlet of the restrictor valve chamber 362. The paint to be rolled enters the restrictor valve 36 from the restrictor valve inlet 367. When the hydraulic pressure generated by the paint reaches a certain level, the small ball 362 is lifted upwards, and the paint passes through the restrictor valve 36. The restrictor valve chamber 361 flows into the restrictor outlet 368. The limiting valve coil 366 is connected in parallel, and the current intensity of the limiting valve coil 366 can be controlled to adjust the magnetic force, thereby controlling the displacement of the movable iron core 364 in the limiting valve chamber 361. Size, so as to control the spring expansion and contraction to adjust the paint flow rate.

As shown in FIGS. 6 to 7, the main valve 39 is arranged on the box body 331. The total valve 39 includes a plurality of gates 391, a rotating shaft 392, a hand wheel 393 and a gate limiting mechanism 394. The number of the gate 391 corresponds to the number of the needle tube 31 and the position of the needle tube 31 one-to-one. A gate 391 is arranged at the connection between each of the first pipe 37 and the paint tank 33, and the gate 391 is arranged on the rotating shaft 392. The rotating shaft 392 is rotatably disposed on the box body 331 through the side wall of the box body 331. The hand wheel 393 is connected to one end of the rotating shaft 392, the hand wheel 393 is located outside the box body 331, and the gate limit mechanism 394 is arranged on the outer wall of the box body 331 for controlling the gate 391 switch. The connecting end of the rotating shaft 392 and the hand wheel 393 is provided with a recess 397. The gate limiting mechanism 394 includes a locking bolt 395 and a bolt bracket 396. The bolt bracket 396 is fixed outside the box body 331, and the locking bolt 395 is connected to the bolt bracket 396. The locking bolt 395 rotatably abuts on the recess 397 to close the gate 391. The gate 391 is a fan-shaped block structure, and its curved surface slides against the inner wall of the lower cavity 336. The gate 391 coincides with the rotation axis of the rotation shaft 392, which is convenient for overall control.

The scraper 51 abuts against the side of the coating roller 1 where the skin is ejected. After leather coating passes through the coating roller 1, part of the leather will adhere to the surface of the coating roller 1 due to the adhesive force of the coating. The scraper 51 can be used to scrape the leather from the coating roller 1. This allows the leather to enter the leather output mechanism 22 smoothly.

Both ends of the cleaning part 52 are arranged on the frame 6, and the top surface of the wiper 523 of the cleaning part 52 abuts on the leather conveying mechanism 2. As shown in FIG. 8, the cleaning part 52 includes a water spray pipe 521, a water tank 522, and the wiper board 523. The water spray pipe 521 is provided on the inner wall of the water tank 522, and the bottom surface of the wiper board 523 Is arranged on the water tank 522, the top surface of the wiper 523 abuts against the cleaning zone 224 of the second conveyor belt 221, and the cleaning zone 224 abuts on the second power roller 223 on one side, The other side of the cleaning area 224 abuts on the wiper 523. During operation, the water spray pipe 521 sprays water to the cleaning area 224, and the wiper 523 scrapes off the sewage passing through the cleaning area 224. As the second conveyor belt 221 is in the second Driven by the power roller 223, it continuously rotates to realize the cleaning of the entire second conveyor belt 221. The sewage is flowed to the water tank 522 by the wiper 523 for treatment.

The present invention also provides a roller coating method of a leather roller coating device based on the surface tension of the round pit texture. As shown in FIG. 9, the method includes the following steps: S10 feeding, starting the pressure pump 35 to add the rubber airbag 341 Pressure, the rubber bladder 341 expands, the partition 332 moves downwards, the air pressure in the lower cavity 336 increases, the main valve 39 is opened, and the paint in the lower cavity 336 flows into the first pipe 37 in. In S20, the material is stored, the current of the limiting valve coil 366 is controlled to adjust the flow rate of the paint. The paint flows through the limiting valve 36 through the second pipe 38 to the needle tube 31, as described later The paint is dripped row by row into the round pits 111 of each row of the storage portion 11 through the needle tube 31 at a certain dripping speed. S30 Finishing, when each row of the storage part 11 is full of paint, the leather conveying mechanism is activated to start feeding the leather, and the leather is delivered to the leather by the leather conveying mechanism after being coated by the coating roller 1 Smoothing mechanism 4, the leather smoothing mechanism 4 then evenly coats the leather and then transports it to the next processing process. During the roller coating process, the paint in each row of the storage part 11 is used up, and will be sent to the needle tube 31 under the rotation of the coating roller 1 for timely replenishment to ensure continuous roller coating. And S40, the paint remaining on the surface of the second conveyor belt 221 is cleaned by the second conveyor belt 221 to the cleaning part. Each of the needle tubes 31 has the same time for every two adjacent drops of paint to drop on the two adjacent rows of storage parts 11.

Example 1

Take the roller-coated polyurethane water emulsion leather finishing agent as an example. The viscosity of the polyurethane water emulsion is 5-8mPa·s at 20°C, and the density is basically the same as water. The diameter of the coating roller is 200mm, and its circumferential surface has 63 rows of storage料部。 Material department.

The finishing methods are as follows:

S10 Feeding, start the pressure pump 35 to pressurize the rubber airbag 341 to 1.5±0.1MPa, the rubber airbag 341 expands, the partition 332 moves downwards, and the air pressure in the lower cavity 336 increases , The main valve 39 is opened, and the paint in the lower cavity 336 flows into the first pipe 37. In S20, the material is stored, the current of the limiting valve coil 366 is controlled to adjust the flow rate of the paint. The paint flows through the limiting valve 36 through the second pipe 38 to the needle tube 31, as described later The paint passes through the needle tube 31 and drops into the round pits 111 of each row of the storage part 11 row by row at a speed of 63 drops per minute. At this time, the coating roller 1 starts to rotate at a speed of 1 r/min. S30 finishing, when each row of the storage part 11 is full of paint, start the leather conveying mechanism to start feeding the leather at a speed of 0.63m/min, and the leather is coated by the coating roller 1 The conveying mechanism sends it to the leather smoothing mechanism 4, and the leather smoothing mechanism 4 evenly coats the leather and then transports it to the next processing process. And S40, the paint remaining on the surface of the second conveyor belt 221 is cleaned by the second conveyor belt 221 to the cleaning part. Complete the roll coating process.

The foregoing descriptions are only exemplary embodiments of the present invention, and do not limit the scope of the patent protection of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related In the same way, all the technical fields are included in the scope of patent protection of the present invention.

Claims

A leather roller coating device based on the surface tension of the round pit texture, which is characterized in that it comprises:

The coating roller is arranged on the frame, the coating roller is cylindrical, and the outer surface of the coating roller is provided with a plurality of discharge storage parts at equal intervals;

Leather conveying mechanism, located under the coating roller, used for conveying the leather to be painted;

The leather smoothing mechanism includes a first smoothing roller and a second smoothing roller, the second smoothing roller is arranged on the leather conveying mechanism, and the first smoothing roller is located above the second smoothing roller; and

The feeding mechanism is arranged above the coating roller, and the feeding mechanism includes a plurality of needle tubes, a coating pool, and a pressure pump arranged in rows; one end of the needle tube is arranged above the coating roller, and the needle tube The other end is connected to the paint tank through a needle tube connector; a flow limiting valve is arranged between the needle tube connector and the paint tank; the pressure pump is connected to the paint tank, the flow limiting valve and the pressure pump It is used to control the discharging amount and discharging speed of the needle tube.
The leather roller coating device based on the surface tension of the round pit texture according to claim 1, wherein each row of the storage portion is composed of a plurality of equally spaced round pits, and each row of the storage portion The center line of the circle pits is parallel to the axis of the coating roller; the number of the needle tubes corresponds to the number of the pits and the positions of the pits on each row of the storage part.
The leather roller coating device based on the surface tension of the round pit texture according to claim 2, wherein a first pipe and a second pipe are arranged between the needle tube connector and the paint bath, and the first One end of the pipe is connected to the paint tank, the other end of the first pipe is connected to one end of the second pipe through the restrictor valve, and the other end of the second pipe is connected to the flow of the needle tube connector. Roads are connected.
The leather roller coating device based on the surface tension of the round pit texture according to claim 3, wherein the coating pool comprises:

The box is set on the rack;

A partition board is arranged on the inner wall of the box body through a sliding connecting plate, and the partition board divides the box body into an upper cavity and a lower cavity;

The airbag mechanism is arranged in the upper cavity. The airbag mechanism includes a rubber airbag, an airbag mouth and an airbag cavity. The airbag cavity is fixed on the inner wall of the box body. The pressure pump is connected, one end of the air bag mouth is connected to the rubber air bag, and the other end of the air bag mouth passes through the air bag cavity and the top wall of the box body is connected to the pressure pump; the partition plate The upper part of the rubber airbag abuts against the inner wall of the top surface of the airbag cavity, and the lower part of the rubber airbag abuts against the top surface of the guide pillar; the guide pillar can be along the inner wall of the airbag cavity. The side wall of the cavity slides up and down; and

The total valve is arranged on the box body. The total valve includes a number of gates, a rotating shaft, a hand wheel and a gate limiting mechanism, and the number of gates corresponds to the number of needle tubes and the position of the needle tube one-to-one Each of the first pipes and the paint tank is connected with a gate, the gate is arranged on the rotating shaft, and the rotating shaft is rotatably arranged on the tank through the side wall of the tank. Physically, the hand wheel is connected to one end of the rotating shaft, the hand wheel is located outside the box, and the gate limit mechanism is arranged on the outer wall of the box body for controlling the opening and closing of the gate.
A leather roller coating device based on the surface tension of the round pit texture according to claim 4, characterized in that it further comprises

A scraper, the scraper abuts against the side of the coating roller; and

The cleaning mechanism is arranged on the frame, and the cleaning part is used to clean the leather conveying mechanism.
The leather roller coating device based on the surface tension of the round pit texture according to claim 5, wherein the leather conveying mechanism comprises:

The leather input mechanism includes a first conveyor belt, a first power roller and two driven rollers, the first conveyor belt is sleeved on the first power roller and the two driven rollers; and

The leather output mechanism includes a second conveyor belt, a pressure roller, and a second power roller. The second conveyor belt is sleeved on the second smoothing roller, the pressure roller and the second power roller, and the coating roller Located above the pressure roller; the leather to be coated is finished in the process from the leather input mechanism to the leather output mechanism.
The leather roller coating device based on the surface tension of the round pit texture according to claim 6, wherein the cleaning part comprises a water spray pipe, a water tank and a wiper, and the water spray pipe is arranged on the On the inner wall of the water tank, the bottom surface of the wiper board is set on the water tank, the top surface of the wiper board abuts against the cleaning zone of the second conveyor belt, and the cleaning zone abuts against the second conveyor belt on one side. On the power roller, the other side of the cleaning zone abuts on the wiper blade.
The leather roller coating device based on the surface tension of the round pit texture according to claim 7, wherein the restrictor valve comprises:

The restrictor valve chamber is provided with a ball, a spring, a moving iron core, and a static iron core. The static iron core is arranged at the top of the restrictor valve chamber, and the moving iron core is located at Below, there is a certain gap between the moving iron core and the static iron core; one end of the spring is arranged at the bottom of the moving iron core, and the other end of the spring is arranged with the small ball, the small ball Abutting against the entrance of the limiting valve chamber, a limiting valve coil is provided on the outer wall of the limiting valve chamber corresponding to the static iron core;

An inlet of the restrictor valve, one end is in communication with the first pipe, and the other end is in communication with the inlet of the restrictor valve chamber; and

One end of the restrictor valve outlet is in communication with the second pipe, and the other end is in communication with the outlet of the restrictor valve chamber.
The roller coating method of a leather roller coating device based on the surface tension of the round pit texture according to claim 8, characterized in that it comprises the following steps:

S10 Feeding, starting the pressure pump to pressurize the rubber airbag, the rubber airbag inflates, the partition moves downward to squeeze the paint in the lower cavity, and then the main valve is opened, and the paint flows into the first In the pipeline

S20 Material storage, controlling the current of the current limiting valve coil to adjust the flow rate of the paint. The paint flows through the limiting valve through the second pipe to the needle tube, and then the paint passes through the The needle tube drops row by row in the round pits of each row of the storage part at a certain dropping speed;

S30 Finishing, when each row of the storage part is full of paint, the leather conveying mechanism is activated to start feeding the leather, and the leather is sent to the leather smoothing mechanism by the leather conveying mechanism after passing the coating of the coating roller , The leather smoothing mechanism then evenly coats the leather and then transports it to the next processing procedure; and

S40 The paint remaining on the surface of the second conveyor belt is transported to the conveyor belt cleaning mechanism along with the second conveyor belt for cleaning.
The roller coating method of a leather roller coating device based on the surface tension of the round pit texture according to claim 8, wherein the rotating speed of the coating roller matches the dripping speed of the needle tube, so that each The dripped paint from the needle tube is dripped row by row into the round pit of the storage part.