Waterborne polyurethane synthetic leather sizing device

Abstract

The utility model belongs to the technical field of synthetic leather, and particularly relates to a waterborne polyurethane synthetic leather sizing device which comprises a shell, the top of the shell is fixedly connected with a slurry barrel; the bottom of the slurry cylinder penetrates through the top of the shell and is communicated with a material guide pipe; the end part of the material guide pipe is communicated with a material spraying pipe; the inner side wall of the shell is fixedly connected with a first connecting plate; the top of the first connecting plate is fixedly connected with a hydraulic cylinder; the output end of the hydraulic cylinder is fixedly connected with a connecting block; by arranging a hydraulic cylinder, a scraping plate and a first roller, the scraping plate can adapt to synthetic leather of various different thicknesses, meanwhile, the first roller can flatten the protruding part of the synthetic leather, and the problem that due to protruding of the surface of the synthetic leather, sprayed slurry slides down from the protruding part, and consequently the slurry is not evenly distributed on the surface of the synthetic leather is solved; meanwhile, the synthetic leather is stabilized by the first roller through the elastic force of the first spring, and the situation that the synthetic leather shakes left and right when the synthetic leather is scraped by the scraper is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of synthetic leather, in particular to a sizing device for waterborne polyurethane synthetic leather. Background Art

[0002] Synthetic leather is an artificial leather that imitates natural leather. It is usually made of polyester, polyvinyl chloride, polyurethane and other materials. It has a similar feel and appearance to natural leather, but is inexpensive and easier to care for and maintain.

[0003] PU water-based synthetic leather is an environmentally friendly synthetic leather. Its main raw material is water-based polyurethane resin, which does not contain harmful substances such as formaldehyde and benzene. When processing PU water-based synthetic leather, in order to make its surface smooth, soft and enhance water resistance, it is necessary to perform sizing operation on its surface.

[0004] In the prior art, when sizing PU water-based synthetic leather, the slurry is usually sprayed onto the surface of the synthetic leather and then smoothed with a scraper. However, the surface of the synthetic leather is not smooth when it is transported to the spraying site, causing the sprayed slurry to slide from the raised position of the synthetic leather to the sunken position, resulting in uneven slurry spraying.

[0005] Therefore, in view of the above problems, a waterborne polyurethane synthetic leather sizing device is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background technology, the utility model provides a sizing device for waterborne polyurethane synthetic leather.

[0007] The technical solution adopted by the utility model to solve its technical problems is as follows: the utility model describes a water-based polyurethane synthetic leather sizing device, comprising a shell; a slurry cylinder is fixedly connected to the top of the shell; the bottom of the slurry cylinder passes through the top of the shell and is connected to a material guide pipe; the end of the material guide pipe is connected to a spray pipe; a first connecting plate is fixedly connected to the inner side wall of the shell; a hydraulic cylinder is fixedly connected to the top of the first connecting plate; a connecting block is fixedly connected to the output end of the hydraulic cylinder; a scraper is fixedly connected to the bottom of the connecting block; a second connecting plate is fixedly connected to the side wall of the connecting block; a first sliding hole is formed through the middle of the second connecting plate on a side away from the connecting block; a first sliding rod is slidably connected in the first sliding hole; the end of the first sliding rod is arranged A first roller is provided; a first spring is fixedly connected between the second connecting plate and the first roller; a conveyor belt is installed inside the shell; by arranging a hydraulic cylinder, a scraper and a first roller, the position of the scraper can be adjusted by using the hydraulic cylinder, so that the scraper can adapt to a variety of synthetic leathers with different thicknesses, thereby improving the practicability of the device; at the same time, the first roller can flatten the raised part of the synthetic leather, so that the slurry sprayed by the spray pipe is more evenly distributed on the surface of the synthetic leather, thereby reducing the problem of uneven distribution of the slurry on the surface of the synthetic leather caused by the sprayed slurry sliding down from the raised part due to the raised surface of the synthetic leather; at the same time, the first roller stabilizes the synthetic leather through the elastic force of the first spring, thereby reducing the left and right shaking of the synthetic leather when the scraper scrapes the synthetic leather.

[0008] Preferably, the side wall of the shell is fixedly connected to a plurality of first support rods; the end of the first support rod is fixedly connected to a motor; the output end of the motor is fixedly connected to a fan; the side wall of the shell is provided with a first ventilation hole; the first ventilation hole is located between the top and bottom of the conveyor belt; the middle of the conveyor belt is provided with a plurality of second ventilation holes; by providing a motor, a fan and a second ventilation hole, when the motor is started, the fan can be driven to rotate and the air in the middle of the conveyor belt can be sucked out, so that suction is generated at the second ventilation hole to adsorb the synthetic leather on the conveyor belt, thereby making the synthetic leather fit more closely on the conveyor belt under the action of suction, further improving the stability of the synthetic leather on the conveyor belt, and further reducing the left and right shaking of the synthetic leather when the scraper scrapes the synthetic leather.

[0009] Preferably, a bellows is fixedly connected to the side wall of the shell; the side wall of the bellows is connected to a first air duct; the other end of the first air duct passes through the top of the shell and is connected to an air jet pipe; an air jet hole is opened in the middle of the air jet pipe; the air jet hole is arranged obliquely toward the conveyor belt; the motor is arranged inside the bellows; by arranging the bellows, the first air duct, the air jet pipe and the air jet hole, the air sucked into the bellows by the fan can be reused, so that the air passes through the first air duct and the air jet pipe and is finally ejected from the air jet hole to sweep the surface of the synthetic leather, thereby blowing away the debris attached to the surface of the synthetic leather before sizing, reducing the uneven sizing caused by the difficulty of slurry penetrating into the place where the debris is attached.

[0010] Preferably, the other side of the wind box is connected to a heating box; a plurality of electric heating wires are arranged in the heating box; a second air duct is connected to the top of the heating box; the other end of the second air duct passes through the top of the outer shell and is connected to a heating plate; the heating plate is hollow and has a plurality of blowing holes at the bottom; by arranging a heating box, electric heating wires, a second air duct and a heating plate, the air in the heating box can be heated by the electric heating wires, so that the hot air passes through the second air duct and is blown out from the heating plate toward the synthetic leather, so that the slurry on the surface of the synthetic leather can be dried quickly, the moisture content in the slurry can be reduced, and the stability of the product can be improved.

[0011] Preferably, a second spring is fixedly connected to the bottom of the shell; a cleaning brush is fixedly connected to the end of the second spring; the cleaning brush is arranged in contact with the bottom of the conveyor belt; a plurality of second sliding rods are fixedly connected to the bottom of the cleaning brush; a plurality of second sliding holes are opened through the bottom of the shell; the second sliding rods are slidably connected to the second sliding holes; by providing a cleaning brush, the surface of the conveyor belt can be cleaned, so that the slurry adhering to the surface of the conveyor belt can be wiped off, reducing the problem of slurry adhering to the unloaded side of the synthetic leather when the conveyor belt rotates, causing contamination to the synthetic leather, and at the same time, the second spring can squeeze the cleaning brush, so that the cleaning brush and the conveyor belt fit more closely, thereby improving the cleaning effect.

[0012] Preferably, a second support rod is fixedly connected to the bottom of the shell; a second roller is installed at the end of the second support rod; a plurality of protrusions are fixedly connected to the middle of the second roller; the protrusions are arranged in contact with the conveyor belt; through the coordinated arrangement of the second roller and the protrusions, the second roller can be driven to rotate when the conveyor belt rotates, so that the protrusions continuously collide with the conveyor belt, causing the slurry attached to the surface of the conveyor belt to loosen, thereby making it easier for the cleaning brush to clean off the slurry, thereby improving the cleaning effect of the cleaning brush.

[0013] The utility model is beneficial in that:

[0014] 1. The utility model discloses a water-based polyurethane synthetic leather sizing device. By arranging a hydraulic cylinder, a scraper and a first roller, the hydraulic cylinder can be used to adjust the position of the scraper, so that the scraper can adapt to a variety of synthetic leathers with different thicknesses, thereby improving the practicability of the device. At the same time, the first roller can flatten the raised part of the synthetic leather, so that the slurry sprayed by the spray pipe is more evenly distributed on the surface of the synthetic leather, thereby reducing the problem of uneven distribution of the slurry on the surface of the synthetic leather caused by the sprayed slurry sliding down from the raised part due to the raised surface of the synthetic leather. At the same time, the first roller stabilizes the synthetic leather through the elastic force of the first spring, thereby reducing the left and right shaking of the synthetic leather when the scraper scrapes the synthetic leather.

[0015] 2. The water-based polyurethane synthetic leather sizing device described in the utility model, by providing a motor, a fan and a second ventilation hole, can drive the fan to rotate and suck out the air in the middle of the conveyor belt when the motor is started, so that suction is generated at the second ventilation hole to adsorb the synthetic leather on the conveyor belt, thereby making the synthetic leather fit more closely on the conveyor belt under the action of the suction force, further improving the stability of the synthetic leather on the conveyor belt, and further reducing the left and right shaking of the synthetic leather when the scraper scrapes the synthetic leather. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0018] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the matching structure of the scraper and the collecting box in the utility model;

[0020] Figure 4 It is a schematic diagram of the cooperation structure between the second roller and the protrusion in the utility model.

[0021] In the figure: 1, housing; 101, slurry cylinder; 102, guide pipe; 103, spray pipe; 104, first connecting plate; 105, hydraulic cylinder; 106, connecting block; 107, scraper; 108, second connecting plate; 109, first sliding hole; 110, first sliding rod; 111, first roller; 112, first spring; 113, conveyor belt; 2, first support rod; 201, motor; 202, fan; 203, first Ventilation hole; 204, second ventilation hole; 3, bellows; 301, first air duct; 302, air jet pipe; 303, air jet hole; 4, heating box; 401, heating wire; 402, second air duct; 403, heating plate; 5, second spring; 501, cleaning brush; 502, second slide bar; 503, second slide hole; 6, second support bar; 601, second roller; 602, bump; 7, feed port; 701, collection box. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figures 1 to 3As shown, a sizing device for water-based polyurethane synthetic leather comprises a shell 1; a slurry barrel 101 is fixedly connected to the top of the shell 1; a guide pipe 102 is connected to the bottom of the slurry barrel 101 through the top of the shell 1; a spray pipe 103 is connected to the end of the guide pipe 102; a first connecting plate 104 is fixedly connected to the inner side wall of the shell 1; a hydraulic cylinder 105 is fixedly connected to the top of the first connecting plate 104; a connecting block 106 is fixedly connected to the output end of the hydraulic cylinder 105; a scraper 107 is fixedly connected to the bottom of the connecting block 106; a second connecting plate 108 is fixedly connected to the side wall of the connecting block 106; the middle part of the second connecting plate 108 is away from the connecting block 10 A first sliding hole 109 is provided on one side of the housing 1; a first sliding rod 110 is slidably connected in the first sliding hole 109; a first roller 111 is installed at the end of the first sliding rod 110; a first spring 112 is fixedly connected between the second connecting plate 108 and the first roller 111; a conveyor belt 113 is installed inside the housing 1; when working, the synthetic leather is placed on the conveyor belt 113, and then the hydraulic cylinder 105 is started, and the hydraulic cylinder 105 pushes the connecting block 106 and the scraper 107 to move toward the conveyor belt 113, so that the second connecting plate 108 is also driven by the connecting block 106 to move toward the conveyor belt 113. Since the first roller 111 is slightly lower than the conveyor belt 113 under normal conditions, the first roller 111 is slightly lower than the conveyor belt 113 under normal conditions. The spray pipe 103 is provided and a spring is fixedly connected between the first roller 111 and the second connecting plate 108, so that the first slide bar 110 and the first roller 111 also move toward the conveyor belt 113 and the first roller 111 contacts the surface of the synthetic leather before the scraper 107. At this time, the first roller 111 presses down the synthetic leather to flatten the raised part of the surface of the synthetic leather, so that the synthetic leather is closely attached to the conveyor belt 113. After the position of the scraper 107 is adjusted, the hydraulic cylinder 105 is closed, and the conveyor belt 113 and the sizing device are started at the same time. At this time, the spray pipe 103 sprays the slurry onto the moving synthetic leather, and the scraper 107 flattens the slurry sprayed on the surface of the synthetic leather. By setting the hydraulic The cylinder 105, the scraper 107 and the first roller 111 can use the hydraulic cylinder 105 to adjust the position of the scraper 107, so that the scraper 107 can adapt to a variety of synthetic leathers with different thicknesses, thereby improving the practicability of the device. At the same time, the first roller 111 can flatten the raised part of the synthetic leather, so that the slurry sprayed by the spray pipe 103 is more evenly distributed on the surface of the synthetic leather, thereby reducing the problem of uneven distribution of the slurry on the surface of the synthetic leather caused by the sprayed slurry sliding down from the raised part due to the raised surface of the synthetic leather. At the same time, the first roller 111 stabilizes the synthetic leather through the elastic force of the first spring 112, thereby reducing the left and right shaking of the synthetic leather when the scraper 107 scrapes the synthetic leather.

[0024] like Figure 4As shown, a plurality of first support rods 2 are fixedly connected to the side wall of the housing 1; a motor 201 is fixedly connected to the end of the first support rod 2; a fan 202 is fixedly connected to the output end of the motor 201; a first ventilation hole 203 is formed through the side wall of the housing 1; the first ventilation hole 203 is located between the top and the bottom of the conveyor belt 113; a plurality of second ventilation holes 204 are formed through the middle of the conveyor belt 113; when working, the motor 201 is turned on, and the fan 202 rotates accordingly, so that the air between the top and the bottom of the conveyor belt 113 is sucked out by the fan 202, and at this time, a negative pressure is generated in the conveyor belt 113, so that the second ventilation holes 204 are formed. A downward suction force is generated at the air hole 204, and under the action of the suction force, the synthetic leather moves closely against the conveyor belt 113. By arranging the motor 201, the fan 202 and the second ventilation hole 204, the fan 202 can be driven to rotate when the motor 201 is started and the air in the middle of the conveyor belt 113 can be sucked out, so that the second ventilation hole 204 generates suction force to adsorb the synthetic leather on the conveyor belt 113, thereby making the synthetic leather fit more closely on the conveyor belt 113 under the action of the suction force, further improving the stability of the synthetic leather on the conveyor belt 113, and further reducing the left and right shaking of the synthetic leather when the scraper 107 scrapes the synthetic leather.

[0025] like Figure 1 to Figure 2 As shown, the side wall of the shell 1 is fixedly connected to a bellows 3; the side wall of the bellows 3 is connected to a first air duct 301; the other end of the first air duct 301 passes through the top of the shell 1 and is connected to an air jet pipe 302; an air jet hole 303 is opened in the middle of the air jet pipe 302; the air jet hole 303 is inclined toward the conveyor belt 113; the motor 201 is arranged inside the bellows 3; when working, after the air sucked in by the fan 202 enters the bellows 3, a part of the air flows into the air jet pipe 302 through the first air duct 301 and The air is blown obliquely toward the surface of the synthetic leather from the air jet hole 303 in the middle of the air jet pipe 302. By arranging the bellows 3, the first air duct 301, the air jet pipe 302 and the air jet hole 303, the air sucked into the bellows 3 by the fan 202 can be reused, so that the air passes through the first air duct 301 and the air jet pipe 302 and is finally ejected from the air jet hole 303 to blow the surface of the synthetic leather, thereby blowing away the debris attached to the surface of the synthetic leather before sizing, thereby reducing the uneven sizing caused by the difficulty of slurry penetrating into the place where the debris is attached.

[0026] like Figures 2 to 3As shown, the other side of the wind box 3 is connected to the heating box 4; a plurality of electric heating wires 401 are arranged in the heating box 4; a second air duct 402 is connected to the top of the heating box 4; the other end of the second air duct 402 passes through the top of the shell 1 and is connected to a heating plate 403; the heating plate 403 is hollow and has a plurality of blowing holes at the bottom; when working, another part of the air in the wind box 3 flows into the heating box 4, and after being heated in the electric heating wires 401, it flows to the heating plate 403 through the second air duct 402. In the hot plate 403, hot air is then blown from the blowing holes of the heating plate 403 toward the sizing synthetic leather to dry the slurry. By providing a heating box 4, a heating wire 401, a second air duct 402 and a heating plate 403, the heating wire 401 can be used to heat the air in the heating box 4, so that the hot air passes through the second air duct 402 and is blown from the heating plate 403 toward the synthetic leather, so that the slurry on the surface of the synthetic leather is quickly dried, the moisture content in the slurry is reduced, and the stability of the product is improved.

[0027] like Figure 1 to Figure 2 As shown, a second spring 5 is fixedly connected to the bottom of the shell 1; a cleaning brush 501 is fixedly connected to the end of the second spring 5; the cleaning brush 501 is arranged in contact with the bottom of the conveyor belt 113; a plurality of second slide bars 502 are fixedly connected to the bottom of the cleaning brush 501; a plurality of second slide holes 503 are opened through the bottom of the shell 1; the second slide bars 502 are slidably connected with the second slide holes 503; by arranging the cleaning brush 501, the surface of the conveyor belt 113 can be cleaned, so that the slurry adhered to the surface of the conveyor belt 113 can be wiped off, reducing the problem of the slurry sticking to the unloaded side of the synthetic leather when the conveyor belt 113 rotates, causing pollution to the synthetic leather, and at the same time, the second spring 5 can squeeze the cleaning brush 501, so that the cleaning brush 501 fits more closely with the conveyor belt 113, thereby improving the cleaning effect.

[0028] like Figure 4 As shown, a second support rod 6 is fixedly connected to the bottom of the shell 1; a second roller 601 is installed at the end of the second support rod 6; a plurality of protrusions 602 are fixedly connected to the middle of the second roller 601; the protrusions 602 are arranged in contact with the conveyor belt 113; through the coordinated arrangement of the second roller 601 and the protrusions 602, the second roller 601 can be driven to rotate when the conveyor belt 113 rotates, so that the protrusions 602 continuously collide with the conveyor belt 113, so that the slurry attached to the surface of the conveyor belt 113 is loosened, thereby making it easier for the cleaning brush 501 to clean off the slurry, thereby improving the cleaning effect of the cleaning brush 501.

[0029] like Figure 3As shown, a feed port 7 is provided through the middle of the scraper 107; a collecting box 701 is connected to the middle of the scraper 107; by providing the feed port 7 and the collecting box 701, when the scraper 107 scrapes the slurry on the surface of the synthetic leather, the scraped slurry flows into the collecting box 701 through the feed port 7, thereby reducing the problem of poor scraping effect due to a large amount of slurry accumulation on the surface of the scraper 107.

[0030] During operation, the synthetic leather is placed on the conveyor belt 113, and then the hydraulic cylinder 105 is started. The hydraulic cylinder 105 pushes the connecting block 106 and the scraper 107 to move toward the conveyor belt 113, so that the second connecting plate 108 is also moved toward the conveyor belt 113 driven by the connecting block 106. Since the first roller 111 is normally slightly lower than the spray pipe 103 and a spring is fixed between the first roller 111 and the second connecting plate 108, the first slide bar 110 and the first roller 111 also move toward the conveyor belt 113 and the first roller 111 contacts the surface of the synthetic leather before the scraper 107. At this time, the first roller 111 presses down on the synthetic leather to flatten the raised part of the surface of the synthetic leather, so that the synthetic leather is tightly attached to the conveyor belt 113. After the position of the scraper 107 is adjusted, the hydraulic cylinder 105 is closed, and the conveyor belt 113 and the sizing device are started at the same time. At this time, the spray pipe 103 will The slurry is sprayed onto the moving synthetic leather, and the scraper 107 scrapes the slurry sprayed on the surface of the synthetic leather flat. The motor 201 is turned on, and the fan 202 rotates accordingly, so that the air between the top and the bottom of the conveyor belt 113 is drawn out by the fan 202. At this time, negative pressure is generated in the conveyor belt 113, so that downward suction is generated at the second ventilation hole 204. Under the action of the suction, the synthetic leather moves closely against the conveyor belt 113. After the air inhaled by the fan 202 enters the bellows 3, a part of the air flows into the jet pipe 302 through the first air duct 301 and is blown obliquely toward the surface of the synthetic leather from the jet hole 303 in the middle of the jet pipe 302. Another part of the air in the bellows 3 flows into the heating box 4, and after being heated in the electric heating wire 401, it flows to the heating plate 403 through the second air duct 402. Then, the hot air is blown from the blowing hole of the heating plate 403 toward the sizing synthetic leather to dry the slurry.

[0031] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A waterborne polyurethane synthetic leather sizing device, comprising a housing (1); characterized in that: A slurry cylinder (101) is fixedly connected to the top of the shell (1); the bottom of the slurry cylinder (101) passes through the top of the shell (1) and is connected to a material guide pipe (102); the end of the material guide pipe (102) is connected to a material spray pipe (103); a first connecting plate (104) is fixedly connected to the inner side wall of the shell (1); a hydraulic cylinder (105) is fixedly connected to the top of the first connecting plate (104); a connecting block (106) is fixedly connected to the output end of the hydraulic cylinder (105); a scraper (107) is fixedly connected to the bottom of the connecting block (106) ; A second connecting plate (108) is fixedly connected to the side wall of the connecting block (106); a first sliding hole (109) is formed through the middle of the second connecting plate (108) on a side away from the connecting block (106); a first sliding rod (110) is slidably connected in the first sliding hole (109); a first roller (111) is installed at the end of the first sliding rod (110); a first spring (112) is fixedly connected between the second connecting plate (108) and the first roller (111); and a conveyor belt (113) is installed inside the housing (1).

2. The waterborne polyurethane synthetic leather sizing device according to claim 1, characterized in that: A plurality of first support rods (2) are fixedly connected to the side wall of the housing (1); a motor (201) is fixedly connected to the end of the first support rod (2); a fan (202) is fixedly connected to the output end of the motor (201); a first ventilation hole (203) is provided through the side wall of the housing (1); the first ventilation hole (203) is located between the top and the bottom of the conveyor belt (113); and a plurality of second ventilation holes (204) are provided through the middle of the conveyor belt (113).

3. The waterborne polyurethane synthetic leather sizing device according to claim 2, characterized in that: The side wall of the outer shell (1) is fixedly connected to a bellows (3); the side wall of the bellows (3) is connected to a first air duct (301); the other end of the first air duct (301) passes through the top of the outer shell (1) and is connected to an air jet pipe (302); an air jet hole (303) is provided in the middle of the air jet pipe (302); the air jet hole (303) is arranged obliquely toward the conveyor belt (113); and the motor (201) is arranged inside the bellows (3).

4. The waterborne polyurethane synthetic leather sizing device according to claim 3, characterized in that: The other side of the wind box (3) is connected to a heating box (4); a plurality of electric heating wires (401) are arranged in the heating box (4); the top of the heating box (4) is connected to a second air duct (402); the other end of the second air duct (402) passes through the top of the outer shell (1) and is connected to a heating plate (403); the heating plate (403) is hollow and has a plurality of blowing holes extending through the bottom.

5. The waterborne polyurethane synthetic leather sizing device according to claim 4, characterized in that: A second spring (5) is fixedly connected to the bottom of the housing (1); a cleaning brush (501) is fixedly connected to the end of the second spring (5); the cleaning brush (501) is arranged in contact with the bottom of the conveyor belt (113); a plurality of second sliding rods (502) are fixedly connected to the bottom of the cleaning brush (501); a plurality of second sliding holes (503) are formed through the bottom of the housing (1); and the second sliding rods (502) are slidably connected to the second sliding holes (503).

6. The waterborne polyurethane synthetic leather sizing device according to claim 5, characterized in that: A second support rod (6) is fixedly connected to the bottom of the housing (1); a second roller (601) is installed at the end of the second support rod (6); a plurality of protrusions (602) are fixedly connected to the middle of the second roller (601); and the protrusions (602) are arranged in contact with the conveyor belt (113).

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