A continuous water-free process for dyeing artificial leather

Abstract

The present invention relates to a continuous water-free washing process for artificial leather dyeing, which is applied to the field of artificial leather dyeing, and comprises the following steps: step 1, pre-dyeing treatment; step 2, dyeing by immersion and pressing process; step 3, pre-drying and molding; step 4, pre-removal of floating color; step 5, mechanical removal of floating color; step 6, drying and molding; step 7, winding and storage. In the present invention, the excess dye and floating color on the surface of the artificial leather base cloth are further removed by a scraping component, and there is no need to use liquid to clean the floating color later, so as to achieve the function of water-free washing, and it is also possible to remove the floating color of artificial leathers of different widths, and level the surface of the artificial leather base cloth, cooperate with a second drying device to heat and dry the artificial leather, so that the dye and the artificial leather are molded into one, and the effect of rapid dyeing molding is achieved, and the function of collecting and reusing the residual dyeing is also achieved by the liquid return component.

Description

Technical Field

[0001] The invention relates to an artificial leather dyeing process, in particular to a continuous water-free dyeing process for artificial leather in the field of artificial leather dyeing. Background Art

[0002] Artificial leather is made of foaming or laminating of PVC and PU with various formulations on a textile or non-woven base. It can be processed according to different strength, color, gloss, pattern and other requirements. Artificial leather needs to be dyed during production. Traditional dyeing mainly includes high temperature and high pressure dyeing, hot melt dyeing and carrier dyeing. Among them, high temperature and high pressure and carrier dyeing are intermittent dyeing, and since each step of dyeing needs to be completed under medium water and high temperature conditions, it leads to high water and energy consumption, and also produces a large amount of printing and dyeing wastewater. Hot melt dyeing realizes the continuous processing of fabrics, but there are a lot of floating colors on the surface of dyed fabrics. These floating colors are due to the separation of one or more of the various pigments in a high proportion after dyeing and floating to the surface. The subsequent reduction cleaning is required, resulting in a large amount of water consumption and wastewater discharge, which does not meet the current requirements for the development of the printing and dyeing industry for energy conservation and emission reduction.

[0003] In order to solve the problem of excessive water consumption and wastewater discharge caused by reducing and cleaning floating colors, a certain leather dyeing process in the market adopts the method of scraping off floating colors to avoid water washing, which has a certain market share.

[0004] After searching, the invention patent with patent publication number CN117026547A discloses a water-free continuous dyeing process for artificial leather applied to the field of artificial leather dyeing technology. The process can grind the surface of the artificial leather before dyeing the artificial leather, effectively improve the adhesion firmness of the secondary dyeing of the artificial leather surface, and reduce the phenomenon of dye shedding after the secondary dyeing of the artificial leather. At the same time, after the dyeing is completed, the artificial leather needs to be squeezed to squeeze out the excess dye, effectively reduce the amount of floating color on the surface of the artificial leather, and thus reduce the amount of water used to wash the artificial leather after dyeing. After the dye is used, the dye can be filtered and recycled by using a flocculant and a filtering device. The recycled water can avoid the water consumption for stain cleaning before dyeing the artificial leather, effectively reducing the water cost of the secondary dyeing of the artificial leather. In addition, the switching of the filter component and the auxiliary filter element of the filtering device can effectively improve the filtering efficiency of the dye.

[0005] Based on the above search and in combination with the prior art, it is found that the existing water-free washing process for artificial leather dyeing uses an extrusion method to squeeze out excess dye and reduce the amount of floating color on the surface of the artificial leather material, but cannot effectively remove the floating color on the surface of the artificial leather. It still needs to be subsequently cleaned with liquid to remove the floating color, and the water-free washing function cannot be obtained. There will be a certain amount of water consumption and wastewater discharge, which cannot meet the current energy-saving and emission-reduction development needs of the printing and dyeing industry. Therefore, a continuous water-free washing process for artificial leather dyeing is proposed to improve the above problems. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing water-free washing process for dyeing artificial leather cannot effectively remove the floating color on the surface of the artificial leather, and still needs to be subsequently washed with liquid to remove the floating color. The water-free washing function cannot be obtained, and there will be a certain amount of water consumption and wastewater discharge.

[0007] To solve the above problems, the present invention provides a continuous water-free washing process for dyeing artificial leather, comprising the following steps:

[0008] Step 1: Pre-dyeing treatment: Use a napping device to nap the surface of the artificial leather base fabric to remove impurities attached to the surface of the base fabric and improve the fastness of dyeing adhesion;

[0009] Step 2: Dyeing by dip-pressing process: dyeing the base fabric of the artificial leather by using dyeing equipment, and then taking out the artificial leather;

[0010] Step 3, pre-drying and forming: using the first drying device to heat and dry the artificial leather base fabric surface taken out after dyeing from below, so that the dye attached to the artificial leather base fabric surface is formed on the base fabric surface, and the dye far away from the artificial leather base fabric surface is less affected;

[0011] Step 4, pre-removal of floating color: in the process of step 3, the artificial leather base fabric surface taken out after dyeing is extruded by an extrusion device to preliminarily remove the floating color on the artificial leather base fabric surface;

[0012] Step 5, mechanical removal of floating color: mechanical scraping equipment is used to remove excess dye on the surface of the artificial leather base fabric, and at the same time, the floating color on the base fabric surface is further removed and the base fabric surface is leveled;

[0013] Step 6, drying and forming: using a second drying device to heat and dry both the upper and lower surfaces of the artificial leather, so that the dye is formed on the artificial leather;

[0014] Step 7, rolling and warehousing: the artificial leather after dyeing and forming is rolled up by a rolling device, and is put into a warehouse for storage at room temperature.

[0015] A continuous water-free washing process for artificial leather dyeing comprises a napping device, a dyeing device, a first drying device and an extrusion device, a mechanical scraping device, a second drying device and a winding device which are connected in sequence, wherein the temperature of the first drying device is set at 80-100°C, and the temperature of the second drying device is set at 140-180°C.

[0016] As a further supplement to the present application, the mechanical scraper equipment includes a scraper box, and the bottom inner wall of the scraper box is designed to be inclined, and a grid support is fixedly installed on the inner walls around the scraper box near the middle position, and both ends of the scraper box are provided with artificial leather inlets and outlets flush with the top surface of the grid support. A lifting assembly is arranged on the top of the inner wall of the scraper box, and the lifting assembly includes a mounting frame fixedly installed on the top of the inner wall of the scraper box, and hydraulic cylinders are fixedly installed on both sides of the top of the mounting frame, and a scraper assembly is arranged at the bottom of the lifting assembly, and the scraper assembly includes a lifting platform and a mounting platform fixedly installed at the bottom of the piston ends of two hydraulic cylinders , and one end of the lifting platform is fixed to one side of the mounting platform, an arc-shaped scraper seat is fixedly installed on one side of the bottom of the mounting platform, and both ends of one side of the mounting platform are rotatably connected with an inclined scraper plate through a pin shaft, and an extension component is arranged between the top of the inclined scraper plate and the top of the lifting platform, the side wall of the inclined scraper plate and the side wall of the arc-shaped scraper seat are designed to be inclined, and the bottom of the inclined scraper plate and the bottom of the arc-shaped scraper seat are fixedly installed with a scraper rubber pad, and the bottoms of the two scraper rubber pads are flush, and the extension component includes a U-shaped frame fixedly installed on one side of the top of the lifting platform, and a rack rack is slidably arranged on the inner wall of the U-shaped frame, and the rack rack A driving gear is meshed with the inner wall of one side, and a forward and reverse motor for driving the driving gear to rotate is fixedly installed on the top of the U-shaped frame. A traction seat is fixedly installed at one end of the rack frame, and both ends of the traction seat are rotatably connected to push-pull rods through pins. A fixed frame is fixed to one side of the top of the two inclined scraper plates, and a guide rod is fixed to the inner wall of the fixed frame. One end of the push-pull rod is rotatably connected to a connecting sleeve inserted in the fixed frame through a pin, and the connecting sleeve is set on the outer wall of the guide rod. A leveling assembly is provided at one end of the scraper assembly, and a liquid return assembly is provided at the bottom of one end of the scraper box, and one end of the liquid return assembly is connected to the dyeing device The two components are connected, and a driving mechanism is arranged between one end of the liquid return component and one end of the leveling component. The lifting component and the scraper component can be used to scrape the surface of the artificial leather base cloth, so as to further remove the excess dye and floating color on the surface of the artificial leather base cloth, and there is no need to use liquid to clean the floating color later, so as to realize the function of water-free washing, avoid a certain amount of water consumption and wastewater discharge, and the extending component can adjust the width of the arc-shaped scraper seat and the two inclined scraper plates as a whole, so that the whole scraper component can be adapted to artificial leathers of different widths, so as to realize the operation of removing floating color on artificial leathers of different widths.

[0017] As a further supplement to the present application, the leveling component includes a movable groove opened at one end of the outer wall of both sides of the scraper box, and the same door-shaped plate is movably inserted into the inner walls of the two movable grooves, and a first connecting shaft distributed equidistantly is rotatably connected between the two ends of the door-shaped plate, and the outer walls of the first connecting shaft are fixed with leveling rollers, and a double pulley is fixed at one end of the first connecting shaft, and a second transmission belt is connected for transmission between two adjacent double pulleys, and buffer holes distributed equidistantly in an annular shape are opened at one end of the top of the lifting platform, and a plurality of buffer columns passing through the buffer holes are fixed at the middle position of the top of the door-shaped plate, and the top of the buffer column is fixedly installed with the same top plate, and buffer springs distributed equidistantly in annular shapes are fixedly installed between the middle position of the top of the door-shaped plate and the bottom end of the lifting platform, and the buffer springs are all sleeved on the outside of the buffer column; the above-mentioned leveling component can be used to level the surface of the artificial leather base fabric, so that the dye can be fully integrated with the artificial leather, and the effect of rapid dyeing and molding can be achieved.

[0018] As a further supplement to the present application, leak-proof plates are fixedly installed at both ends of the outer wall of the door-shaped plate, and the leak-proof plates are affixed to one side of the movable groove; the use of the above-mentioned leak-proof plates can seal the movable groove to avoid leakage of the scraped dye.

[0019] As a further supplement to the present application, the liquid return component includes a liquid return pipe fixedly installed at the bottom of one end of the scraper box, and support frames are fixed at both ends of the inner wall of the liquid return pipe, the inner wall of the support frame is rotatably connected to the auger shaft through a sealed bearing, and the outer wall of the auger shaft is fixedly installed with auger blades; the above-mentioned liquid return component can be used to return the scraped dye along the liquid return pipe to the dyeing equipment, thereby realizing the function of collecting and reusing the dyeing residue.

[0020] As a further supplement to the present application, the driving mechanism includes a connecting groove opened at the top of the outer wall of one side of the scraper box, and a guide column is fixed at the middle position of the inner wall of the connecting groove, and a tensioning sleeve block is movably arranged on the outer wall of the guide column and the inner wall of the connecting groove, and the top and bottom of the tensioning sleeve block are fixedly installed with a tensioning spring between the top and bottom of the connecting groove, and one side of the tensioning sleeve block is rotatably connected to the second connecting shaft, an L-shaped frame is fixedly installed at the bottom corner of the outer wall of one side of the scraper box, and a driving motor is fixedly installed on one side of the L-shaped frame, and a transmission wheel is fixedly installed on the output shaft of the driving motor, the outer wall of the second connecting shaft and one end of one of the first connecting shafts, and the outer walls of the three transmission wheels are transmission-connected with the first transmission belt, and the scraper A connecting frame is fixedly installed on the bottom of the inner wall of one end of the box close to the return liquid pipe, and a connecting frame is fixedly installed on the bottom of the connecting frame, both ends of the connecting frame are provided with a first connecting hole, one end of the auger shaft is rotatably connected to the inner wall of the first connecting hole through a sealed bearing, one side of the connecting frame is provided with a second connecting hole, and the output shaft of the driving motor is fixedly installed with a driving shaft passing through the second connecting hole, the outer wall of the driving shaft is rotatably connected to the inner wall of the second connecting hole through a sealed bearing, one end of the driving shaft and one end of the auger shaft are fixedly installed with a bevel gear, and one side of the two bevel gears are meshed; the above-mentioned driving mechanism can drive the leveling assembly and the liquid return assembly to operate synchronously, thereby achieving the synchronous effect of leveling operation and waste material recycling operation.

[0021] In summary, after adopting the above structure, the present invention has the following advantages compared with the prior art:

[0022] 1. By adopting the cooperation of the above-mentioned extrusion equipment, mechanical scraper equipment, lifting assembly and scraper assembly, the artificial leather base fabric surface taken out after dyeing can be squeezed under the extrusion action of the extrusion equipment, and the excess dye and floating color on the artificial leather base fabric surface can be preliminarily removed. Under the action of the lifting assembly, the scraper assembly is attached to the artificial leather base fabric surface after squeezing, and the scraping action of the arc-shaped scraper seat, the inclined scraper plate and the scraper rubber pad is used to further remove the excess dye on the surface of the artificial leather base fabric, and the floating color on the base fabric surface is further removed at the same time, so as to fully remove the floating color on the surface of the artificial leather, and there is no need to use liquid to clean the floating color later, so as to realize the function of water-free washing, avoid a certain amount of water consumption and wastewater discharge, and meet the current energy-saving and emission-reduction printing and dyeing industry development needs;

[0023] 2. By using the above-mentioned scraper assembly and stretching assembly, the expansion angle of the oblique scraper plate in the scraper assembly can be changed under the adjustment of the stretching assembly, and the width of the arc-shaped scraper seat and the two oblique scraper plates as a whole can be changed, so that the entire scraper assembly can be adapted to artificial leathers of different widths, and the floating color removal operation can be realized on artificial leathers of different widths;

[0024] 3. The lifting assembly, the leveling assembly, the driving mechanism and the second drying device are used. Under the action of the lifting assembly, the leveling assembly and the scraping assembly can be simultaneously attached to the base fabric surface of the artificial leather. The driving action of the driving mechanism is used to drive the leveling roller to rotate to achieve leveling of the base fabric surface of the artificial leather. The second drying device is used to heat and dry the artificial leather, so that the dye and the artificial leather are formed into one, and the effect of rapid dyeing and forming is achieved, which directly avoids the subsequent cleaning process, is easy to operate, and saves more water.

[0025] 4. By adopting the above-mentioned liquid return component and driving mechanism, the dye scraped out by the scraper component can flow along the grid support into the bottom of the scraper box for collection. At this time, the auger blades in the liquid return component are driven to rotate under the action of the driving mechanism, so that the scraped dye flows back to the dyeing equipment along the liquid return pipe, realizing the function of collecting and reusing the dyeing residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is the process flow chart of this application;

[0027] Figure 2 This is the process flow mechanical working sequence diagram of this application;

[0028] Figure 3 This is a schematic diagram of the overall structure of the mechanical scraping equipment of this application;

[0029] Figure 4 A cross-sectional view of the mechanical scraping device of the present application;

[0030] Figure 5 This is a schematic diagram of the scraper box structure of the mechanical scraper equipment of this application;

[0031] Figure 6 This is a schematic diagram of the structure of the scraper assembly of this application;

[0032] Figure 7 This is a schematic diagram of the driving gear structure of this application;

[0033] Figure 8 This is a working state diagram of the scraper assembly of this application;

[0034] Fig. 9 This is a schematic diagram of the leveling component structure of this application;

[0035] Fig.10 This is a schematic diagram of the structure of the driving mechanism of the present application;

[0036] Fig.11 This is a schematic diagram of the first transmission belt after adjustment of the present application;

[0037] Fig.12 This is a schematic diagram of the connection frame and bevel gear structure of the present application.

[0038] Description of the numbers in the figure:

[0039] 1. Napping equipment; 2. Dyeing equipment; 3. First drying equipment; 4. Extrusion equipment; 5. Mechanical scraping equipment; 6. Second drying equipment; 7. Winding equipment; 8. Scraping box; 9. Grid support platform; 10. Artificial leather inlet and outlet; 11. Liquid return assembly; 1101. Liquid return pipe; 1102. Support frame; 1103. Auger blade; 12. Driving mechanism; 1201. Driving motor; 1202. First transmission belt; 1203. Connecting groove; 1204. Driving wheel; 1205. Tensioning sleeve; 1206. Guide column; 1207. Tensioning spring; 1208. Driving shaft; 1209. Connecting frame; 1210. Bevel gear; 13. Leveling assembly; 1301. Door Template; 1302, leveling roller; 1303, movable groove; 1304, buffer spring; 1305, buffer column; 1306, top plate; 1307, buffer hole; 1308, second transmission belt; 1309, double pulley; 14, leak-proof plate; 15, scraper assembly; 1501, lifting platform; 1502, mounting platform; 1503, arc-shaped scraper seat; 1504, scraper rubber pad; 1505, inclined scraper plate; 1506, fixed frame; 1508, push-pull rod; 1509, traction seat; 1510, rack frame; 1511, forward and reverse motor; 1512, guide rod; 1513, connecting sleeve; 1514, driving gear; 16, mounting frame; 17, hydraulic cylinder. DETAILED DESCRIPTION

[0040] The implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0041] The present invention provides a continuous water-free process for dyeing artificial leather. Figure 1-Figure 12 , including the following steps:

[0042] Step 1, pre-dyeing treatment: using a napping device 1 to nap the surface of the artificial leather base fabric to remove impurities attached to the surface of the base fabric and also improve the fastness of dyeing adhesion;

[0043] Step 2, dyeing by dipping and pressing process: dyeing the base fabric of the artificial leather by using dyeing equipment 2, and then taking out the artificial leather;

[0044] Step 3, pre-drying and forming: using the first drying device 3 to heat and dry the artificial leather base fabric surface taken out after dyeing from below, so that the dye attached to the artificial leather base fabric surface is formed on the base fabric surface, and the dye far away from the artificial leather base fabric surface is less affected;

[0045] Step 4, pre-removal of floating color: in the process of step 3, the artificial leather base fabric surface taken out after dyeing is extruded by the extrusion device 4 to preliminarily remove the floating color on the artificial leather base fabric surface;

[0046] Step 5, mechanical removal of floating color: when the mechanical scraping device 5 is used to remove the excess dye on the surface of the artificial leather base fabric, the floating color on the base fabric surface is further removed at the same time, and the base fabric surface is leveled;

[0047] Step 6, drying and forming: using the second drying device 6 to heat and dry both the upper and lower surfaces of the artificial leather, so that the dye is formed on the artificial leather;

[0048] Step 7, rolling up and storing: the artificial leather after dyeing and forming is rolled up by a rolling device 7, and stored in a warehouse for storage at room temperature.

[0049] A continuous water-free washing process for dyeing artificial leather comprises a napping device 1, a dyeing device 2, a first drying device 3 and an extrusion device 4, a mechanical scraping device 5, a second drying device 6 and a winding device 7 which are connected in sequence, wherein the temperature of the first drying device 3 is set at 80-100°C, and the temperature of the second drying device 6 is set at 140-180°C.

[0050] In the present invention, the mechanical scraper device 5 includes a scraper box 8, and the bottom inner wall of the scraper box 8 is designed to be inclined, and a grid support platform 9 is fixedly installed on the inner wall around the scraper box 8 near the middle position, and both ends of the scraper box 8 are provided with an artificial leather inlet and outlet 10 flush with the top surface of the grid support platform 9. A lifting component is arranged on the top of the inner wall of the scraper box 8, and the lifting component includes a mounting frame 16 fixedly installed on the top of the inner wall of the scraper box 8, and hydraulic cylinders 17 are fixedly installed on both sides of the top of the mounting frame 16, and a scraper component 15 is arranged at the bottom of the lifting component, and the scraper component 15 includes a lifting platform 1501 and a mounting platform 1502 fixedly installed at the bottom of the piston ends of the two hydraulic cylinders 17, and one end of the lifting platform 1501 is relative to one side of the mounting platform 1502. The bottom side of the mounting platform 1502 is fixedly mounted with an arc-shaped scraper seat 1503, and both ends of one side of the mounting platform 1502 are rotatably connected with an inclined scraper plate 1505 through a pin shaft, and an extension component is arranged between the top of the inclined scraper plate 1505 and the top of the lifting platform 1501, and the side walls of the inclined scraper plate 1505 and the side walls of the arc-shaped scraper seat 1503 are designed to be inclined, and the bottom of the inclined scraper plate 1505 and the bottom of the arc-shaped scraper seat 1503 are fixedly mounted with a scraper rubber pad 1504, and the bottoms of the two scraper rubber pads 1504 are flush, and the extension component includes a U-shaped frame fixedly mounted on one side of the top of the lifting platform 1501, and the inner wall of the U-shaped frame is slidably provided with a rack rack 1510, and the inner wall of one side of the rack rack 1510 A driving gear 1514 is meshed, and a forward and reverse motor 1511 for driving the driving gear 1514 to rotate is fixedly installed on the top of the U-shaped frame. A traction seat 1509 is fixedly installed on one end of the rack frame 1510, and both ends of the traction seat 1509 are rotatably connected to push-pull rods 1508 through pins. A fixed frame 1506 is fixed to one side of the top of the two inclined scraper plates 1505, and a guide rod 1512 is fixed to the inner wall of the fixed frame 1506. One end of the push-pull rod 1508 is rotatably connected to a connecting sleeve 1513 inserted in the fixed frame 1506 through a pin, and the connecting sleeve 1513 is sleeved on the outer wall of the guide rod 1512. A leveling assembly 13 is provided at one end of the scraper assembly 15, and the leveling assembly 13 includes a There are movable grooves 1303 at one end of the outer walls of both sides of the material box 8, and the inner walls of the two movable grooves 1303 are movably plugged with the same door-shaped plate 1301, and the first connecting shafts equidistantly distributed are rotatably connected between the two ends of the door-shaped plate 1301, and the outer walls of the first connecting shafts are fixed with leveling rollers 1302, and one end of the first connecting shaft is fixed with a double pulley 1309, and the second transmission belt 1308 is connected between the two adjacent double pulleys 1309, and the top end of the lifting platform 1501 is provided with buffer holes 1307 equidistantly distributed in an annular shape, and a plurality of buffer columns 1305 passing through the buffer holes 1307 are fixed at the middle position of the top of the door-shaped plate 1301, and the top of the buffer column 1305 is fixedly installed with the same top plate 1306,Buffer springs 1304 are fixedly installed between the top middle position of the door plate 1301 and one end of the bottom of the lifting platform 1501, and the buffer springs 1304 are all sleeved on the outside of the buffer column 1305. A liquid return component 11 is arranged at the bottom of one end of the scraper box 8, and one end of the liquid return component 11 is connected to the dyeing device 2. A driving mechanism 12 is arranged between one end of the liquid return component 11 and one end of the leveling component 13. For example, Figure 1-Figure 12 As shown, a lifting component is used to adjust the height of the scraper component 15 and the leveling component 13, so that the scraper rubber pad 1504 and the leveling roller 1302 are attached to the surface of the artificial leather base fabric after extrusion, and the scraping action of the arc-shaped scraper seat 1503, the inclined scraper plate 1505 and the scraper rubber pad 1504 is used to further remove the excess dye and floating color on the surface of the artificial leather base fabric, and the expansion angle of the inclined scraper plate 1505 can be changed under the adjustment of the stretching component, and the overall width of the arc-shaped scraper seat 1503 and the two inclined scraper plates 1505 is adjusted, so that the entire scraper component 15 can be adapted to artificial leathers of different widths, so that in the subsequent process, there is no need to use liquid to clean the floating color, and the function of water-free washing is realized, and the surface of the artificial leather base fabric can be leveled by the leveling roller 1302, so that the dye can be fully integrated with the artificial leather, so that the dye and the artificial leather are formed into one, and the effect of rapid dyeing molding is achieved, which directly avoids the subsequent cleaning process and saves more water.

[0051] In the present invention, both ends of the outer wall of the door-shaped plate 1301 are fixedly installed with leak-proof plates 14, and the leak-proof plates 14 are attached to one side of the movable groove 1303. Figure 3 and Figure 5 As shown, during the movement of the door plate 1301, the anti-leakage plate 14 always moves, so that the anti-leakage plate 14 always fits on one side of the movable groove 1303, avoiding the problem of leakage of the scraped dye.

[0052] In the present invention, the liquid return assembly 11 includes a liquid return pipe 1101 fixedly installed at the bottom of one end of the scraper box 8, and support frames 1102 are fixed to both ends of the inner wall of the liquid return pipe 1101. The inner wall of the support frame 1102 is rotatably connected to the auger shaft through a sealed bearing, and the outer wall of the auger shaft is fixedly installed with an auger blade 1103. Figure 3 , Figure 4 , Figure 5 , Fig.10 and Fig.12 As shown, the driving mechanism 12 drives the auger shaft and auger blades 1103 in the liquid return assembly 11 to rotate, and the scraped dye flows back to the dyeing equipment 2 along the liquid return pipe 1101, thereby realizing the functions of collecting and recycling the dyeing residue.

[0053] In the present invention, the driving mechanism 12 includes a connecting groove 1203 opened at the top of the outer wall of one side of the scraper box 8, and a guide column 1206 is fixed at the middle position of the inner wall of the connecting groove 1203, and a tensioning sleeve 1205 is movably provided on the outer wall of the guide column 1206 and the inner wall of the connecting groove 1203, and a tensioning spring 1207 is fixedly installed between the top and bottom of the tensioning sleeve 1205 and the top and bottom of the connecting groove 1203, and one side of the tensioning sleeve 1205 is rotatably connected to the second connecting shaft, and an L-shaped frame is fixedly installed at the bottom corner of the outer wall of one side of the scraper box 8, and a driving motor 1201 is fixedly installed on one side of the L-shaped frame, and a transmission wheel 12 is fixedly installed on the output shaft of the driving motor 1201, the outer wall of the second connecting shaft and one end of one of the first connecting shafts. 04, the outer wall transmission of the three transmission wheels 1204 is connected with the first transmission belt 1202, a connecting frame is fixedly installed on the bottom of the inner wall of one end of the scraper box 8 close to the return liquid pipe 1101, and a connecting frame 1209 is fixedly installed on the bottom of the connecting frame, both ends of the connecting frame 1209 are provided with a first connecting hole, one end of the auger shaft is rotatably connected to the inner wall of the first connecting hole through a sealed bearing, one side of the connecting frame 1209 is provided with a second connecting hole, and the output shaft of the driving motor 1201 is fixedly installed with a driving shaft 1208 passing through the second connecting hole, the outer wall of the driving shaft 1208 is rotatably connected to the inner wall of the second connecting hole through a sealed bearing, one end of the driving shaft 1208 and one end of the auger shaft are fixedly installed with a bevel gear 1210, and one side of the two bevel gears 1210 are meshed. Figure 3 , Figure 4 , Fig.10 , Fig.11 and Fig.12 As shown, the tensioning action of the tensioning sleeve 1205 and the tensioning spring 1207 is utilized to keep the first transmission belt 1202 in a tensioned state at all times, and the driving action of the driving motor 1201 in the driving mechanism 12 drives the driving shaft 1208 and the first transmission belt 1202 to rotate synchronously, thereby driving the leveling component 13 to work, and cooperating with the meshing action of the bevel gear 1210 to drive the liquid return component 11 to work, so that the leveling component 13 and the liquid return component 11 can operate synchronously.

[0054] In summary: when in use, the artificial leather is passed through the entire dyeing process, and the surface of the artificial leather base fabric is napped by the napping device 1 to remove the attached impurities on the surface of the base fabric; then the artificial leather base fabric is dyed by the dyeing device 2; subsequently, the first drying device 3 is used to heat and dry the artificial leather base fabric surface after dyeing from below, and the dye attached to the artificial leather base fabric surface is formed on the base fabric surface, and in this process, the artificial leather base fabric surface taken out after dyeing is squeezed by the extrusion device 4 to preliminarily remove the excess dye and floating color on the artificial leather base fabric surface; the hydraulic cylinder 17 of the lifting component in the mechanical scraper device 5 is continued to be used to adjust the scraper component 15 and the leveling component 13 The height of the lifting platform 1501, the mounting platform 1502, the arc-shaped scraper seat 1503 and the oblique scraper plate 1505 are adjusted to make the scraper rubber pad 1504 fit on the surface of the artificial leather base fabric after extrusion. The scraping action of the arc-shaped scraper seat 1503, the oblique scraper plate 1505 and the scraper rubber pad 1504 is used to further remove the excess dye and floating color on the surface of the artificial leather base fabric. Moreover, the driving gear 1514 can be driven to rotate under the driving action of the forward and reverse motor 1511 in the stretching component, so as to change the position of the rack rack 1510 and the traction seat 1509, change the expansion angle of the oblique scraper plate 1505, and adjust the overall angle of the arc-shaped scraper seat 1503 and the two oblique scraper plates 1505. The width of the body makes the entire scraper assembly 15 adaptable to artificial leathers of different widths, so that there is no need to use liquid to clean the floating color in the subsequent process, and the function of water-free washing is realized. In addition, when the height of the leveling assembly 13 is adjusted, the leveling roller 1302 of the leveling assembly 13 is also made to fit on the base fabric surface of the artificial leather, and the driving motor 1201 in the driving mechanism 12 drives the transmission wheel 1204, the first transmission belt 1202 and the first connecting shaft to rotate, and the transmission effect of the double pulley 1309 and the second transmission belt 1308 drives multiple leveling rollers 1302 to rotate synchronously, thereby leveling the base fabric surface of the artificial leather, so that the dye can be fully integrated with the artificial leather. At the same time, the scraper The dye scraped out by the material assembly 15 can flow along the grid support platform 9 into the bottom of the scraper box 8 for collection. The driving motor 1201 in the driving mechanism 12 drives the driving shaft 1208 to rotate, driving the bevel gear 1210 to rotate, and driving the auger shaft and the auger blade 1103 in the liquid return assembly 11 to rotate, so that the scraped dye is returned to the dyeing equipment 2 along the liquid return pipe 1101, and the dyeing residue is collected and reused; next, the second drying equipment 6 is used to heat and dry the upper and lower surfaces of the artificial leather, so that the dye is formed on the artificial leather; finally, the winding equipment 7 is used to wind up the dyed and formed artificial leather, and put it into the warehouse for storage at room temperature.

[0055] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A continuous water-free process for dyeing artificial leather, characterized in that: The following steps are involved: Step 1, pre-dyeing treatment: using a napping device (1) to nap the surface of the artificial leather base fabric to remove impurities attached to the surface of the base fabric and also to improve the fastness of dyeing adhesion; Step 2, dyeing by dip-pressing process: dyeing the base fabric of the artificial leather using dyeing equipment (2), and then taking out the artificial leather; Step 3, pre-drying and molding: using the first drying device (3) to heat and dry the artificial leather base fabric surface taken out after dyeing from below, so that the dye attached to the artificial leather base fabric surface is molded on the base fabric surface, and the dye away from the artificial leather base fabric surface is less affected; Step 4, pre-removal of floating color: during step 3, the artificial leather base fabric surface taken out after dyeing is extruded by an extrusion device (4) to preliminarily remove the floating color on the artificial leather base fabric surface; Step 5, mechanical removal of floating color: using a mechanical scraping device (5) to remove excess dye from the surface of the artificial leather base fabric, while also further removing floating color from the base fabric surface and leveling the base fabric surface; Step 6, drying and molding: using the second drying device (6) to heat and dry both the upper and lower surfaces of the artificial leather, so that the dye is molded on the artificial leather; Step 7, rolling up and storing: using a rolling device (7) to roll up the dyed and formed artificial leather, and storing it in a warehouse for storage at room temperature; The invention comprises a napping device (1), a dyeing device (2), a first drying device (3), an extrusion device (4), a mechanical scraping device (5), a second drying device (6) and a winding device (7) which are connected in sequence, wherein the temperature of the first drying device (3) is set at 80-100° C., and the temperature of the second drying device (6) is set at 140-180° C.; The mechanical scraping device (5) comprises a scraping box (8), and the bottom inner wall of the scraping box (8) is designed to be inclined. A grid support platform (9) is fixedly installed on the inner walls of the scraping box (8) near the middle position. Both ends of the scraping box (8) are provided with artificial leather inlets and outlets (10) flush with the top surface of the grid support platform (9). A lifting component is provided at the top of the inner wall of the scraping box (8), and a scraping component (15) is provided at the bottom of the lifting component. A leveling component (13) is provided at one end of the scraping component (15). A liquid return component (11) is provided at the bottom of one end of the scraping box (8), and one end of the liquid return component (11) is connected to the dyeing device (2). A driving mechanism (12) is provided between one end of the liquid return component (11) and one end of the leveling component (13). The lifting assembly comprises a mounting frame (16) fixedly mounted on the top of the inner wall of the scraper box (8), and hydraulic cylinders (17) are fixedly mounted on both sides of the top of the mounting frame (16); The scraper assembly (15) comprises a lifting platform (1501) and a mounting platform (1502) fixedly mounted on the bottom of the piston ends of the two hydraulic cylinders (17), and one end of the lifting platform (1501) is fixed to one side of the mounting platform (1502), an arc-shaped scraper seat (1503) is fixedly mounted on one side of the bottom of the mounting platform (1502), and both ends of one side of the mounting platform (1502) are rotatably connected to an inclined scraper plate (1505) through a pin shaft, an extension assembly is arranged between the top of the inclined scraper plate (1505) and the top of the lifting platform (1501), the side wall of the inclined scraper plate (1505) and the side wall of the arc-shaped scraper seat (1503) are both designed to be inclined, and a scraper rubber pad (1504) is fixedly mounted on the bottom of the inclined scraper plate (1505) and the bottom of the arc-shaped scraper seat (1503), and the bottoms of the two scraper rubber pads (1504) are flush; The extension assembly comprises a U-shaped frame fixedly mounted on one side of the top of the lifting platform (1501), and a rack frame (1510) is slidably arranged on the inner wall of the U-shaped frame, a driving gear (1514) is meshed with the inner wall of one side of the rack frame (1510), a forward and reverse motor (1511) for driving the driving gear (1514) to rotate is fixedly mounted on the top of the U-shaped frame, a traction seat (1509) is fixedly mounted on one end of the rack frame (1510), and the traction seat Both ends of (1509) are rotatably connected to push-pull rods (1508) via pins, a fixed frame (1506) is fixed to one side of the top of the two inclined scraper plates (1505), and a guide rod (1512) is fixed to the inner wall of the fixed frame (1506), and one end of the push-pull rod (1508) is rotatably connected to a connecting sleeve (1513) inserted in the fixed frame (1506) via a pin, and the connecting sleeve (1513) is sleeved on the outer wall of the guide rod (1512).

2. The continuous water-free process for dyeing artificial leather according to claim 1, characterized in that: The leveling assembly (13) comprises a movable groove (1303) opened at one end of the outer wall of both sides of the scraper box (8), and the inner walls of the two movable grooves (1303) are movably plugged with the same door-shaped plate (1301), and the first connecting shafts distributed at equal distances are rotatably connected between the two ends of the door-shaped plate (1301), and the outer walls of the first connecting shafts are fixed with leveling rollers (1302), and one end of the first connecting shaft is fixed with a double pulley (1309), and a second transmission belt (1308) is connected between two adjacent double pulleys (1309). The lifting platform (15 01) is provided with buffer holes (1307) distributed in an annular shape at equal distances at one end of the top, and a plurality of buffer columns (1305) passing through the buffer holes (1307) are fixed at the middle position of the top of the door-shaped plate (1301), and the same top plate (1306) is fixedly installed on the top of the buffer columns (1305), and buffer springs (1304) distributed in an annular shape at equal distances are fixedly installed between the middle position of the top of the door-shaped plate (1301) and one end of the bottom of the lifting platform (1501), and the buffer springs (1304) are all sleeved on the outside of the buffer columns (1305).

3. The continuous water-free process for dyeing artificial leather according to claim 2, characterized in that: Anti-leakage plates (14) are fixedly mounted on both ends of the outer wall of the door-shaped plate (1301), and the anti-leakage plates (14) are fitted on one side of the movable groove (1303).

4. The continuous water-free process for dyeing artificial leather according to claim 1, characterized in that: The liquid return assembly (11) comprises a liquid return pipe (1101) fixedly mounted at the bottom of one end of the scraper box (8), and support frames (1102) are fixedly mounted at both ends of the inner wall of the liquid return pipe (1101), the inner wall of the support frame (1102) is rotatably connected to an auger shaft via a sealed bearing, and an auger blade (1103) is fixedly mounted on the outer wall of the auger shaft.

5. The continuous water-free process for dyeing artificial leather according to claim 1, characterized in that: The driving mechanism (12) comprises a connecting groove (1203) provided at the top of the outer wall of one side of the scraper box (8), and a guide column (1206) is fixed at the middle position of the inner wall of the connecting groove (1203), a tensioning sleeve (1205) is movably provided on the outer wall of the guide column (1206) and the inner wall of the connecting groove (1203), a tensioning spring (1207) is fixedly installed between the top and bottom of the tensioning sleeve (1205) and the top and bottom of the connecting groove (1203), and a second connecting shaft is rotatably connected to one side of the tensioning sleeve (1205), an L-shaped frame is fixedly installed at the bottom corner of the outer wall of one side of the scraper box (8), and a driving motor (1201) is fixedly installed on one side of the L-shaped frame, and a transmission wheel (1201) is fixedly installed on the output shaft of the driving motor (1201), the outer wall of the second connecting shaft and one end of one of the first connecting shafts. 04), the outer walls of the three transmission wheels (1204) are connected to the first transmission belt (1202), a connecting frame is fixedly installed on the bottom of the inner wall of one end of the scraper box (8) close to the return liquid pipe (1101), and a connecting frame (1209) is fixedly installed on the bottom of the connecting frame, both ends of the connecting frame (1209) are provided with a first connecting hole, one end of the auger shaft is rotatably connected to the inner wall of the first connecting hole through a sealed bearing, one side of the connecting frame (1209) is provided with a second connecting hole, and the output shaft of the drive motor (1201) is fixedly installed with a drive shaft (1208) passing through the second connecting hole, the outer wall of the drive shaft (1208) is rotatably connected to the inner wall of the second connecting hole through a sealed bearing, one end of the drive shaft (1208) and one end of the auger shaft are fixedly installed with a bevel gear (1210), and one side of the two bevel gears (1210) are meshed.

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