Water-based napped breathable leather dip coating equipment and production process

Abstract

The application discloses a kind of water-based napped breathable leather dip-coating equipment and production process, including impregnation tank and oven, the impregnation tank is fixedly connected with channel between oven, the top surface of impregnation tank is provided with top cover, impregnation cavity is opened in the inside of impregnation tank, the top surface of impregnation cavity is open structure, and the top surface of impregnation cavity is provided with inlet structure.The main stirring structure is hollow annular structure as a whole, rotating stirring is carried out on the side of base cloth, the stirring arc plate on the inside can continuously exchange bottom size and upper size during work, form the exchange of size in vertical direction, and the hollow annular structure does not affect the normal conveying of base cloth, so that the stratification phenomenon of size in impregnation tank is avoided, the impregnation quality is guaranteed, and when the main stirring structure works, hammering block will knock to the side wall of impregnation cavity, so as to drive size vibration, air bubbles in size can be discharged, and the impregnation effect is further guaranteed.

Description

Technical Field

[0001] This invention relates to the field of water-based leather preparation technology, specifically to a water-based suede breathable leather dipping and coating equipment and production process. Background Technology

[0002] Water-based leather, as an environmentally friendly leather product, has excellent economic and environmental value. Water-based suede breathable leather is a water-based leather product with good nap. Water-based leather is prepared using water-based polyurethane and additives. The preparation process mainly includes mixing, dip coating, drying, sanding, and surface treatment. Among them, the dip coating process involves impregnating a base fabric with water-based polyurethane slurry to form a base layer. For example, Chinese invention patent CN116607328A discloses a low-cost, high-quality water-based suede preparation method, which includes the following steps: A water-based PU slurry is prepared, comprising deionized water, water-based polyurethane, monovalent salt, water-soluble polymer, and additives; wherein the water-based polyurethane includes anionic water-based polyurethane resin and easily gelling water-based polyurethane; a base fabric is passed through an impregnation tank, and the water-based PU slurry fully impregnates the base fabric; the impregnated base fabric is then passed through a pair of rollers to extrude excess slurry; the base fabric is then subjected to low-temperature drying; the semi-finished product is further processed to obtain this low-cost, high-quality water-based suede leather. However, the current water-based suede impregnation coating process has the following drawbacks:

[0003] The current impregnation method mainly involves impregnating the base fabric with polyurethane slurry in an impregnation tank. However, polyurethane slurry is a viscous slurry, which is prone to sedimentation and stratification in the impregnation tank, affecting the impregnation effect of the base fabric.

[0004] To address these issues, we propose a water-based suede breathable leather dipping and coating equipment and production process. Summary of the Invention

[0005] The purpose of this invention is to provide a water-based suede breathable leather dipping and coating equipment and production process to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a water-based suede breathable leather dipping and coating equipment, comprising an impregnation tank and an oven, wherein a channel is fixedly connected between the impregnation tank and the oven, a top cover is provided on the top surface of the impregnation tank, an impregnation cavity is opened inside the impregnation tank, the top surface of the impregnation cavity is an open structure, a feeding structure is provided on the top surface of the impregnation cavity, two lower support rollers are horizontally rotatably connected inside the impregnation cavity, an upper support roller is rotatably connected above the lower support rollers in the impregnation cavity, an outlet is opened on the side wall of the impregnation tank near the connecting channel, a main stirring structure is provided inside the impregnation cavity between the two lower support rollers, multiple sub-stirring structures are rotatably connected inside the impregnation cavity, and a liquid-squeezing structure is provided inside the impregnation cavity near the outlet;

[0007] The main stirring structure includes multiple rings and two seats. The two seats are fixed to the bottom surface of the impregnation chamber. Multiple rods are uniformly fixed to the inner walls of the rings. Multiple stirring arc plates are fixed to the inner walls of the rods. Multiple hinge seats are fixed to the periphery of the two rings at both ends. A shaft is rotatably connected inside the hinge seats. One end of two end rods is fixed to both ends of the shaft. A hammer block is rotatably connected between the other ends of the two end rods. A torsion spring is fixed between the shaft and the hinge seats. Two T-shaped arc grooves are formed on the top surface of the two seats. Two T-shaped slip rings are slidably connected to the two T-shaped arc grooves. The two T-shaped slip rings are fixedly sleeved on the outer side of two of the rings. A driven toothed ring is fixedly sleeved on the outer side of the middle ring.

[0008] Preferably, the sub-stirring structure includes a vertical rod and a spiral plate. The spiral plate is fixedly sleeved on the outside of the vertical rod. The vertical rod is rotatably connected to the bottom surface of the impregnation chamber. A first transmission chamber is opened inside the bottom surface of the impregnation tank. The bottom ends of multiple vertical rods in the multiple sub-stirring structures are located in the first transmission chamber and are fixedly connected to multiple driven bevel gears.

[0009] Preferably, a first servo geared motor is fixedly connected to the center of one end of the first transmission cavity, a main transmission rod is fixedly connected to the shaft end of the first servo geared motor, a plurality of sub-transmission rods are rotatably connected inside the first transmission cavity, a plurality of driving bevel gears are fixedly connected to the plurality of sub-transmission rods near the plurality of driven bevel gears, the driving bevel gears mesh with the driven bevel gears, a plurality of worm gears are fixedly sleeved at the middle of the plurality of sub-transmission rods, and a plurality of worms are fixedly connected to the main transmission rod near the plurality of worm gears, the worms mesh with the worm gears.

[0010] Preferably, a transmission box is fixedly connected to the center inside the first transmission cavity, the top of the transmission box is located at the bottom surface of the immersion cavity, a rotating rod is rotatably connected to the top surface inside the transmission box, the end of the rotating rod is located outside the transmission box and fixedly connected to a drive gear, the drive gear meshes with a driven gear ring, the main transmission rod is rotatably connected to the transmission box, the main transmission rod is fixedly sleeved with a first drive pulley at a position inside the transmission box, the rotating rod is fixedly sleeved with a first driven pulley, and a first synchronous belt is sleeved on the first drive pulley and the first driven pulley.

[0011] Preferably, the feeding structure includes a feeding port, which is fixed to the top surface of the impregnation chamber. A sealing port is vertically opened on the top cover and is sleeved on the outer side of the top of the feeding port. Two rubber rollers are rotatably connected inside the feeding port, and an inlet roller is rotatably connected to the inner side of the top surface of the feeding port. Two first gears are fixedly connected to the shaft ends of the two rubber rollers at the inner position of the side wall of the feeding port, and the two first gears are meshed together.

[0012] Preferably, the liquid-rolling structure includes two side plates, two crossbars are horizontally fixed between the top and bottom ends of the two side plates, and two liquid-rolling roller assemblies are rotatably connected between the two side plates. Each liquid-rolling roller assembly includes multiple rubber crossbars uniformly fixed between the edges of two circular plates, and two second gears are fixedly connected at the shaft ends of the two liquid-rolling roller assemblies inside the side plates. The two second gears are meshed with each other.

[0013] Preferably, a second transmission cavity is formed inside the side wall of the impregnation tank. One end of the shaft of one of the rubber rollers is located in the second transmission cavity and is fixedly connected to a second driven pulley. One end of the shaft of one of the liquid-pressing roller assemblies is located in the second transmission cavity and is fixedly connected to a third driven pulley. A second servo reduction motor is fixedly connected in the second transmission cavity. A second driving pulley is fixedly connected to the shaft end of the second servo reduction motor. A second synchronous belt is sleeved on the second driving pulley, the second driven pulley, and the third driven pulley.

[0014] Preferably, the oven has a horizontal drying tunnel, and two air distribution plates are fixed to the top and bottom surfaces inside the oven. The two air distribution plates are fixed to and connected to multiple air heads on one side of each other. Two electric heating grids are fixed to the oven above and below the drying tunnel.

[0015] Preferably, the connecting channel is connected to the outlet and the drying tunnel at both ends, multiple induction heating rollers are rotatably connected inside the connecting channel, two discharge rollers are rotatably connected to the top and bottom surfaces of the outlet, a fan is fixedly connected to the top surface of the drying oven, the fan is connected to two air distribution plates, a convex frame is fixedly connected to the bottom surface of the top cover edge, and a concave edge is opened on the periphery of the top surface of the impregnation tank, with the convex frame fitting the concave edge.

[0016] This invention also provides a water-based suede breathable leather production process using a water-based suede breathable leather dipping and coating equipment, comprising the following steps:

[0017] Step 1: Preparation of direct coating slurry: Add thickener to 300 kg of deionized water and mix for 5 minutes at a stirring speed of 400-600 rpm until the viscosity reaches 2500-3000 CPS. Then add 100 kg of waterborne polyurethane resin and additives and mix for about 5 minutes. Reduce the stirring speed to 300-400 rpm and stir evenly. Then add waterborne colorant and stir evenly. After completion, thicken to 2000-2500 CPS and filter to obtain the direct coating slurry.

[0018] Step 2: Preparation of dry base: Add the direct coating slurry obtained in Step 1 into the impregnation tank for impregnation. The liquid level is 50 cm. The pile base fabric enters from the feed structure and is fully impregnated. After the excess liquid is squeezed out by the liquid-squeezing structure 7, it enters the connecting channel for preheating and then enters the drying oven for drying at a temperature of 120-150℃ to obtain a semi-finished base. The pile base fabric machine speed is 5-8 m / min.

[0019] Step 3: Sanding: Sand both sides of the semi-finished bass obtained in Step 2 with 180-grit sandpaper to obtain a velvety semi-finished product;

[0020] Step 4: Preparation of surface treatment agent: Add 0.5-3.0 kg of additive and 0.5-5.0 kg of water-based color paste to 100 kg of water-based surface treatment material, mix and stir for 10-15 minutes, then add thickener and thicken to a viscosity of 2000-2500 CPS to obtain the surface treatment agent;

[0021] Step 5: Surface treatment: The suede semi-finished product obtained in Step 3 is surface treated with the surface treatment agent obtained in Step 4 through a 120-mesh anilox roller and dried at a temperature of 120-150℃ to obtain water-based suede breathable leather.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The main stirring structure of this invention is a hollow ring structure that rotates and stirs around the base fabric. The inner stirring arc plate continuously exchanges the bottom slurry with the upper slurry during operation, forming a vertical exchange of slurry. The hollow ring structure does not affect the normal transport of the base fabric, thus avoiding slurry stratification in the impregnation tank and ensuring impregnation quality. Furthermore, when the main stirring structure is working, the hammer block strikes the side wall of the impregnation chamber, causing the slurry to vibrate and expel air bubbles, further ensuring the impregnation effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure in the first embodiment of the present invention;

[0025] Figure 2 These are schematic diagrams of the main body cross-section structure in the first and second embodiments of the present invention;

[0026] Figure 3 This is a schematic diagram of the main stirring structure in the first embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure at the ring body in the first embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the transmission structure at the main stirring structure and the sub-stirring structure in the second embodiment of the present invention;

[0029] Figure 6 For the present invention Figure 5 Enlarged structural diagram of point A in the middle;

[0030] Figure 7 This is a schematic diagram of the cross-sectional structure at the feed structure in the second embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure at the liquid-rolling structure in the second embodiment of the present invention;

[0032] Figure 9 This is a schematic diagram of the cross-sectional structure at the immersion tank in the second embodiment of the present invention;

[0033] Figure 10 This is a schematic diagram of the cross-sectional structure of the oven in the second embodiment of the present invention.

[0034] In the diagram: 1. Impregnation tank; 2. Drying oven; 3. Connecting channel; 4. Main stirring structure; 5. Sub-stirring structure; 6. Feeding structure; 7. Squeezing structure; 11. Impregnation chamber; 12. Lower support roller; 13. Upper support roller; 14. Outlet; 15. Discharge roller; 16. Top cover; 17. Sealing port; 18. First transmission chamber; 19. First servo geared motor; 110. Main transmission rod; 111. Sub-transmission rod; 112. Driven bevel gear; 113. Driven bevel gear; 114. Worm gear; 115. Worm wheel; 116. Transmission box; 117. Rotating rod; 118. Driven gear; 119. First drive pulley; 120. First driven pulley; 121. First synchronous belt; 122. Convex frame; 123. Concave edge; 124. Second transmission chamber; 125. Second Servo geared motor; 126. Second drive pulley; 127. Second synchronous belt; 21. Drying tunnel; 22. Air distribution plate; 23. Air head; 24. Electric heating grid; 25. Fan; 31. Induction heating roller; 41. Ring body; 42. Seat body; 43. T-shaped arc groove; 44. T-shaped slip ring; 45. Driven gear ring; 46. Rod body; 47. Stirring arc plate; 48. Hinge seat; 49. Shaft; 410. End rod; 411. Hammering block; 412. Torsion spring; 51. Vertical rod; 52. Spiral plate; 61. Feed inlet; 62. Rubber roller; 63. Guide roller; 64. First gear; 65. Second driven pulley; 71. Side plate; 72. Crossbar; 73. Liquid rolling roller assembly; 74. Second gear; 75. Third driven pulley; 731. Circular plate; 732. Rubber crossbar. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1:

[0037] Please see Figure 1-4This invention provides a technical solution: a water-based suede breathable leather dipping and coating equipment, including an impregnation tank 1 and an oven 2, a channel 3 fixedly connecting the impregnation tank 1 and the oven 2, a top cover 16 provided on the top surface of the impregnation tank 1, an impregnation cavity 11 opened inside the impregnation tank 1, the top surface of the impregnation cavity 11 is an open structure, a feeding structure 6 is provided on the top surface of the impregnation cavity 11, two lower support rollers 12 are horizontally rotatably connected inside the impregnation cavity 11, an upper support roller 13 is rotatably connected above the lower support rollers 12, an outlet 14 is opened on the side wall of the impregnation tank 1 near the connecting channel 3, a main stirring structure 4 is provided inside the impregnation cavity 11 between the two lower support rollers 12, multiple sub-stirring structures 5 are rotatably connected inside the impregnation cavity 11, and a liquid-rolling structure 7 is provided inside the impregnation cavity 11 near the outlet 14;

[0038] The main stirring structure 4 includes multiple rings 41 and two seats 42. The two seats 42 are fixed to the bottom surface of the impregnation chamber 11. Multiple rods 46 are uniformly fixed to the inner walls of the multiple rings 41. Multiple stirring arc plates 47 are fixed to the inner walls of the rods 46. Multiple hinge seats 48 are fixed to the periphery of the two rings 41 at both ends. A shaft 49 is rotatably connected inside the hinge seat 48. One end of two end rods 410 is fixed to both ends of the shaft 49. A hammer block 411 is rotatably connected between the other ends of the two end rods 410. A torsion spring 412 is fixed between the shaft 49 and the hinge seat 48. Two T-shaped arc grooves 43 are formed on the top surface of the two seats 42. Two T-shaped slip rings 44 are slidably connected to the two T-shaped arc grooves 43. The two T-shaped slip rings 44 are fixed sleeves. Two of the rings 41 are attached to the outside of the middle ring 41, and the driven toothed ring 45 is fixedly sleeved on the outside of the middle ring 41. The main stirring structure 4 is a hollow ring structure. It rotates and stirs around the base fabric. The inner stirring arc plate 47 can continuously exchange the bottom slurry with the upper slurry during operation, forming a vertical exchange of slurry. The hollow ring structure does not affect the normal conveying of the base fabric, thus avoiding the phenomenon of stratification of slurry in the impregnation tank 1 and ensuring the impregnation quality. When the main stirring structure 4 is working, the hammer block 411 will hit the side wall of the impregnation chamber 11, which will cause the slurry to vibrate and expel air bubbles in the slurry, further ensuring the impregnation effect.

[0039] Example 2:

[0040] Please see Figure 2 and Figure 5-10 This is the second embodiment of the present invention, which is based on the previous embodiment. The sub-stirring structure 5 includes a vertical rod 51 and a spiral plate 52. The spiral plate 52 is fixedly sleeved on the outside of the vertical rod 51. The vertical rod 51 is rotatably connected to the bottom surface of the impregnation chamber 11. A first transmission chamber 18 is opened inside the bottom surface of the impregnation tank 1. The bottom ends of the multiple vertical rods 51 in the multiple sub-stirring structures 5 are located in the first transmission chamber 18 and are fixedly connected to multiple driven bevel gears 112. The use of the spiral plate 52 for stirring is also to allow the slurry to be exchanged in the vertical direction.

[0041] The first servo geared motor 19 is fixedly connected to the center of one end of the first transmission cavity 18. The main transmission rod 110 is fixedly connected to the shaft end of the first servo geared motor 19. Multiple sub-transmission rods 111 are rotatably connected inside the first transmission cavity 18. Multiple driving bevel gears 113 are fixedly connected to the multiple sub-transmission rods 111 near the multiple driven bevel gears 112. The driving bevel gears 113 mesh with the driven bevel gears 112. Multiple worm gears 115 are fixedly sleeved at the middle of the multiple sub-transmission rods 111. Multiple worms 114 are fixedly connected to the main transmission rod 110 near the multiple worm gears 115. The worms 114 mesh with the worm gears 115.

[0042] The transmission box 116 is fixedly connected to the center of the first transmission cavity 18. The top of the transmission box 116 is located at the bottom of the impregnation cavity 11. The rotating rod 117 is rotatably connected to the top surface inside the transmission box 116. The end of the rotating rod 117 is located outside the transmission box 116 and is fixedly connected to the drive gear 118. The drive gear 118 meshes with the driven gear ring 45. The main transmission rod 110 is rotatably connected to the transmission box 116. The main transmission rod 110 is located inside the transmission box 116 and is fixedly sleeved with the first drive pulley 119. The rotating rod 117 is fixedly sleeved with the first driven pulley 120. The first synchronous belt 121 is sleeved on the first drive pulley 119 and the first driven pulley 120. The drive structure inside the first transmission cavity 18 is specifically designed to provide power to the main stirring structure 4 and the sub-stirring structure 5.

[0043] The feeding structure 6 includes a feeding port 61, which is fixed to the top surface of the impregnation chamber 11. A sealing port 17 is vertically opened on the top cover 16, and the sealing port 17 is sleeved on the outer side of the top of the feeding port 61. Two rubber rollers 62 are rotatably connected inside the feeding port 61, and an inlet roller 63 is rotatably connected to the inner side of the top surface of the feeding port 61. Two first gears 64 are fixedly connected to the shaft ends of the two rubber rollers 62 at the inner position of the side wall of the feeding port 61. The two first gears 64 are meshed and connected. When the two rubber rollers 62 are conveying the base fabric, they can discharge the air in the base fabric and avoid the occurrence of too many air bubbles in the slurry.

[0044] The slurry-squeezing structure 7 includes two side plates 71, with two horizontal crossbars 72 fixed between the top and bottom ends of the two side plates 71. Two slurry-squeezing roller assemblies 73 are rotatably connected between the two side plates 71. Each slurry-squeezing roller assembly 73 includes two circular plates 731 with multiple rubber crossbars 732 evenly fixed between their edges. The shaft ends of the two slurry-squeezing roller assemblies 73 are located inside the side plates 71 and are fixed with two second gears 74. The two second gears 74 mesh with each other and are used to filter out excess slurry on the base fabric. The slurry can fall through the gaps between the rubber crossbars 732.

[0045] A second transmission cavity 124 is opened inside the side wall of the impregnation tank 1. The end of the shaft of one rubber roller 62 is located in the second transmission cavity 124 and is fixed to a second driven pulley 65. The end of the shaft of one liquid-pressing roller assembly 73 is located in the second transmission cavity 124 and is fixed to a third driven pulley 75. A second servo reduction motor 125 is fixed in the second transmission cavity 124. The end of the shaft of the second servo reduction motor 125 is fixed to a second driving pulley 126. A second synchronous belt 127 is sleeved on the second driving pulley 126, the second driven pulley 65 and the third driven pulley 75. The second servo reduction motor 125 is used to provide rotational power for the rubber roller 62 and the liquid-pressing roller assembly 73.

[0046] A drying tunnel 21 is horizontally opened inside the oven 2. Two air distribution plates 22 are fixedly connected to the top and bottom surfaces inside the oven 2. The two air distribution plates 22 are fixedly connected to and connected to multiple air heads 23 on one side of each other. Two electric heating grids 24 are fixedly connected to the oven 2 above and below the drying tunnel 21.

[0047] The connecting channel 3 connects to the outlet 14 and the drying tunnel 21 at both ends. Multiple induction heating rollers 31 are rotatably connected inside the connecting channel 3. Two discharge rollers 15 are rotatably connected to the top and bottom surfaces of the outlet 14. A fan 25 is fixedly connected to the top surface of the drying oven 2. The fan 25 is connected to two uniform air plates 22. A convex frame 122 is fixedly connected to the bottom edge of the top cover 16. A concave edge 123 is opened on the periphery of the top surface of the impregnation tank 1. The convex frame 122 fits into the concave edge 123. The connecting channel 3 is used to preheat the impregnated base fabric for better drying.

[0048] Example 3:

[0049] The third embodiment of the present invention, based on the above two embodiments, provides a water-based suede breathable leather production process using a water-based suede breathable leather dipping and coating equipment, comprising the following steps:

[0050] Step 1: Preparation of direct coating slurry: Add thickener to 300 kg of deionized water and mix for 5 minutes at a stirring speed of 400-600 rpm until the viscosity reaches 2500-3000 CPS. Then add 100 kg of waterborne polyurethane resin and additives and mix for about 5 minutes. Reduce the stirring speed to 300-400 rpm and stir evenly. Then add waterborne colorant and stir evenly. After completion, thicken to 2000-2500 CPS and filter to obtain the direct coating slurry.

[0051] Step 2: Preparation of dry base: Add the direct coating slurry obtained in Step 1 into the impregnation tank 1 for impregnation coating. The liquid level is 50 cm. The pile base fabric enters from the feeding structure and is fully impregnated. After the excess liquid is squeezed out by the liquid squeezing structure 7, it enters the connecting channel 3 for preheating and then enters the drying oven 2 for drying. The drying temperature is 120-150℃ to obtain the semi-finished base. The pile base fabric speed is 5-8 m / min.

[0052] Step 3: Sanding: Sand both sides of the semi-finished bass obtained in Step 2 with 180-grit sandpaper to obtain a velvety semi-finished product;

[0053] Step 4: Preparation of surface treatment agent: Add 0.5-3.0 kg of additive and 0.5-5.0 kg of water-based color paste to 100 kg of water-based surface treatment material, mix and stir for 10-15 minutes, then add thickener and thicken to a viscosity of 2000-2500 CPS to obtain the surface treatment agent;

[0054] Step 5: Surface treatment: The suede semi-finished product obtained in Step 3 is surface treated with the surface treatment agent obtained in Step 4 through a 120-mesh anilox roller and dried at a temperature of 120-150℃ to obtain water-based suede breathable leather.

[0055] Example 4:

[0056] Please see Figure 1-10 This is the fourth embodiment of the present invention, based on the above three embodiments. In this invention, during impregnation, the base fabric is fed through the feeding structure 6, two lower support rollers 12, and an upper support roller 13 from the outlet 14 into the connecting channel 3, and finally into the drying tunnel 21. At the end, a winding device is used for traction. During impregnation, the main impregnation location of the base fabric is between the two lower support rollers 12. During impregnation, the main stirring structure 4 locally stirs the base fabric at this location. The main stirring structure 4 of this invention has a hollow annular structure. The slurry is rotated and stirred around the base fabric. The inner stirring arc plate 47 can continuously exchange the bottom slurry with the upper slurry during operation, forming a vertical exchange of slurry. The hollow ring structure does not affect the normal conveying of the base fabric, thus avoiding the phenomenon of stratification of slurry in the impregnation tank 1 and ensuring impregnation quality. When the main stirring structure 4 is working, the hammer block 411 will hit the side wall of the impregnation chamber 11, which will cause the slurry to vibrate and expel air bubbles in the slurry, further ensuring the impregnation effect.

[0057] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water-based suede breathable leather dipping and coating apparatus, comprising an impregnation tank (1) and an oven (2), characterized in that: The impregnation tank (1) is fixedly connected to the oven (2) via a channel (3). The top surface of the impregnation tank (1) is provided with a top cover (16). An impregnation cavity (11) is opened inside the impregnation tank (1). The top surface of the impregnation cavity (11) is an open structure. A feeding structure (6) is provided on the top surface of the impregnation cavity (11). Two lower support rollers (12) are horizontally rotatably connected inside the impregnation cavity (11). An upper support roller (13) is rotatably connected above the lower support rollers (12) in the impregnation cavity (11). An outlet (14) is opened on the side wall of the impregnation tank (1) near the connecting channel (3). A main stirring structure (4) is provided between the two lower support rollers (12) inside the impregnation cavity (11). Multiple sub-stirring structures (5) are rotatably connected inside the impregnation cavity (11). A liquid-squeezing structure (7) is provided inside the impregnation cavity (11) near the outlet (14). The main stirring structure (4) includes multiple rings (41) and two seats (42). The two seats (42) are fixed to the bottom surface of the impregnation chamber (11). Multiple rods (46) are uniformly fixed to the inner sidewalls of the multiple rings (41). Multiple stirring arc plates (47) are fixed to the inner sidewalls of the rods (46). Multiple hinge seats (48) are fixed to the periphery of the two rings (41) located at both ends. A shaft (49) is rotatably connected inside the hinge seat (48). Two end rods (41) are fixed to both ends of the shaft (49). 0) At one end, a hammer block (411) is rotatably connected between the other ends of the two end rods (410). A torsion spring (412) is fixed between the shaft (49) and the hinge seat (48). Two T-shaped arc grooves (43) are opened on the top surface of the two seats (42). Two T-shaped arc grooves (43) are slidably connected to two T-shaped slip rings (44). The two T-shaped slip rings (44) are fixedly sleeved on the outside of two of the ring bodies (41). A driven toothed ring (45) is fixedly sleeved on the outside of the middle ring body (41). The main stirring structure (4) is a hollow ring structure. It rotates and stirs around the base fabric. The inner stirring arc plate (47) can continuously exchange the bottom slurry with the upper slurry during operation, forming a vertical exchange of slurry. When the main stirring structure (4) is working, the hammer block (411) will hit the side wall of the impregnation chamber (11).

2. The water-based suede breathable leather dipping and coating equipment according to claim 1, characterized in that: The sub-stirring structure (5) includes a vertical rod (51) and a spiral plate (52). The spiral plate (52) is fixedly sleeved on the outside of the vertical rod (51). The vertical rod (51) is rotatably connected to the bottom surface of the impregnation chamber (11). A first transmission chamber (18) is opened inside the bottom surface of the impregnation tank (1). The bottom ends of multiple vertical rods (51) in the multiple sub-stirring structures (5) are located in the first transmission chamber (18) and are fixedly connected to multiple driven bevel gears (112).

3. The water-based suede breathable leather dipping and coating equipment according to claim 2, characterized in that: A first servo geared motor (19) is fixedly connected to the center of one end of the first transmission cavity (18). The main transmission rod (110) is fixedly connected to the shaft end of the first servo geared motor (19). Multiple sub-transmission rods (111) are rotatably connected inside the first transmission cavity (18). Multiple driving bevel gears (113) are fixedly connected to multiple driven bevel gears (112) near multiple driven bevel gears (112). The driving bevel gears (113) mesh with the driven bevel gears (112). Multiple worm gears (115) are fixedly sleeved at the middle of the multiple sub-transmission rods (111). Multiple worms (114) are fixedly connected to the main transmission rod (110) near multiple worm gears (115). The worms (114) mesh with the worm gears (115).

4. The water-based suede breathable leather dipping and coating equipment according to claim 3, characterized in that: A transmission box (116) is fixedly connected to the center inside the first transmission cavity (18). The top of the transmission box (116) is located at the bottom surface of the immersion cavity (11). A rotating rod (117) is rotatably connected to the top surface inside the transmission box (116). The end of the rotating rod (117) is located outside the transmission box (116) and is fixedly connected to the drive gear (118). The drive gear (118) meshes with the driven gear ring (45). The main transmission rod (110) is rotatably connected to the transmission box (116). The main transmission rod (110) is fixedly sleeved with the first drive pulley (119) inside the transmission box (116). The rotating rod (117) is fixedly sleeved with the first driven pulley (120). A first synchronous belt (121) is sleeved on the first drive pulley (119) and the first driven pulley (120).

5. The water-based suede breathable leather dipping and coating equipment according to claim 1, characterized in that: The feeding structure (6) includes a feeding port (61), which is fixed to the top surface of the impregnation chamber (11). A sealing port (17) is vertically opened on the top cover (16). The sealing port (17) is sleeved on the outer side of the top of the feeding port (61). Two rubber rollers (62) are rotatably connected inside the feeding port (61). An inlet roller (63) is rotatably connected to the inner side of the top surface of the feeding port (61). Two first gears (64) are fixedly connected to the shaft ends of the two rubber rollers (62) at the inner position of the side wall of the feeding port (61). The two first gears (64) are meshed and connected.

6. The water-based suede breathable leather dipping and coating equipment according to claim 5, characterized in that: The rolling structure (7) includes two side plates (71), two horizontal crossbars (72) are fixed between the top and bottom ends of the two side plates (71), and two rolling roller assemblies (73) are rotatably connected between the two side plates (71). The rolling roller assembly (73) includes multiple rubber crossbars (732) evenly fixed between the edges of two circular plates (731). Two second gears (74) are fixed at the shaft ends of the two rolling roller assemblies (73) inside the side plates (71), and the two second gears (74) mesh with each other.

7. The water-based suede breathable leather dipping and coating equipment according to claim 6, characterized in that: The impregnation tank (1) has a second transmission cavity (124) inside its side wall. The end of the shaft of one of the rubber rollers (62) is located in the second transmission cavity (124) and is fixed to a second driven pulley (65). The end of the shaft of one of the liquid rolling roller assemblies (73) is located in the second transmission cavity (124) and is fixed to a third driven pulley (75). A second servo reduction motor (125) is fixed in the second transmission cavity (124). The end of the shaft of the second servo reduction motor (125) is fixed to a second driving pulley (126). A second synchronous belt (127) is sleeved on the second driving pulley (126), the second driven pulley (65) and the third driven pulley (75).

8. The water-based suede breathable leather dipping and coating equipment according to claim 1, characterized in that: The oven (2) has a horizontal drying channel (21) inside. Two air distribution plates (22) are fixed to the top and bottom surfaces inside the oven (2). The two air distribution plates (22) are fixed to and connected to multiple air heads (23) on one side close to each other. Two electric heating grids (24) are fixed to the oven (2) above and below the drying channel (21).

9. The water-based suede breathable leather dipping and coating equipment according to claim 8, characterized in that: The connecting channel (3) is connected to the outlet (14) and the drying tunnel (21) at both ends. Multiple induction heating rollers (31) are rotatably connected inside the connecting channel (3). Two discharge rollers (15) are rotatably connected to the top and bottom surfaces of the outlet (14). A fan (25) is fixedly connected to the top surface of the drying oven (2). The fan (25) is connected to two uniform air plates (22). A convex frame (122) is fixedly connected to the bottom edge of the top cover (16). A concave edge (123) is opened on the periphery of the top surface of the impregnation tank (1). The convex frame (122) is fitted with the concave edge (123).

10. A water-based suede breathable leather production process using the water-based suede breathable leather dipping equipment according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: Preparation of direct coating slurry: Add thickener to 300 kg of deionized water and mix for 5 minutes at a stirring speed of 400-600 rpm until the viscosity reaches 2500-3000 CPS. Then add 100 kg of waterborne polyurethane resin and additives and mix for about 5 minutes. Reduce the stirring speed to 300-400 rpm and stir evenly. Then add waterborne colorant and stir evenly. After completion, thicken to 2000-2500 CPS and filter to obtain the direct coating slurry. Step 2: Dry Bass Preparation: Add the direct coating slurry obtained in Step 1 into the impregnation tank (1) for impregnation. The liquid level is 50 cm. The fleece base fabric enters from the feed structure and is fully impregnated. After the excess liquid is squeezed out by the liquid-squeezing structure (7), it enters the connecting channel (3) for preheating and then enters the drying oven (2) for drying. The drying temperature is 120-150℃ to obtain the semi-finished bass. The fleece base fabric speed is 5-8 m / min. Step 3: Sanding: Sand both sides of the semi-finished bass obtained in Step 2 with 180-grit sandpaper to obtain a velvety semi-finished product; Step 4: Preparation of surface treatment agent: Add 0.5-3.0 kg of additive and 0.5-5.0 kg of water-based color paste to 100 kg of water-based surface treatment material, mix and stir for 10-15 minutes, then add thickener and thicken to a viscosity of 2000-2500 CPS to obtain the surface treatment agent; Step 5: Surface treatment: The suede semi-finished product obtained in Step 3 is surface treated with the surface treatment agent obtained in Step 4 through a 120-mesh anilox roller and dried at a temperature of 120-150℃ to obtain water-based suede breathable leather.

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