A coating device for PU synthetic leather processing

Abstract

The application discloses a coating device for PU synthetic leather processing and relates to the technical field of PU synthetic leather.The coating device comprises a processing frame and a coating mechanism, a fixing frame is installed on one side in the processing frame, the coating mechanism is installed on the fixing frame, a conveying pipe is connected to the upper end of the coating mechanism, the upper end of the conveying pipe is fixedly connected with a storage frame through a pump, a receiving frame is installed at the lower end of the coating mechanism, the coating mechanism comprises two coating rollers, the two coating rollers are placed in front of and behind each other, and conical guide plates are fixedly connected to the upper ends of the coating rollers.The coating device adopts a vertical coating mode, so that the synthetic leather passes between the two vertically placed coating rollers, the coating rollers can perform coating treatment on both sides of the synthetic leather, the coating effects of the two sides are consistent, the problem that the coating intensities of the two sides of the synthetic leather are inconsistent is avoided, and the conical guide plates and the hemispheres arranged at the upper ends of the coating rollers are combined with the feeding cover, so that the coating can be uniformly adhered to the coating rollers, and the coating effect of the synthetic leather is better.

Description

Technical Field

[0001] This invention relates to the field of PU synthetic leather processing technology, specifically to a coating device for PU synthetic leather processing. Background Technology

[0002] PU synthetic leather is a type of artificial leather made by coating a substrate with polyurethane. It is generally cheaper, lighter, easier to clean and maintain than genuine leather, and offers a wider range of colors and textures. PU synthetic leather is widely used in industries such as fashion, furniture, and automotive interiors. During the production of PU synthetic leather, the surface of the synthetic leather often undergoes a coating treatment to enhance its appearance and further expand its applications.

[0003] Currently, in existing technologies, such as CN214917705U, a coating device for processing synthetic leather uses a coating sponge and slurry to perform double-sided coating processing on synthetic leather, thus solving the problem of low efficiency in single-sided coating.

[0004] However, when performing double-sided coating on synthetic leather, due to the influence of gravity, the coating adhering to the surface of the bottom coating roller tends to slide down, making it impossible for the coating to effectively adhere to the synthetic leather. Furthermore, due to the placement of the upper and lower coating rollers, the coating effect on the upper end of the synthetic leather is better than that on the lower end, resulting in uneven coating on the upper and lower surfaces of the synthetic leather. This affects the production and processing of synthetic leather. Therefore, a coating device for processing PU synthetic leather was designed to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a coating apparatus for processing PU synthetic leather, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a coating device for processing PU synthetic leather, comprising a processing frame and a coating mechanism, a fixing frame installed on one side of the processing frame, the coating mechanism being installed on the fixing frame, a transport pipe connected to the upper end of the coating mechanism, a storage frame fixedly connected to the upper end of the transport pipe via a pump, and a receiving frame installed at the lower end of the coating mechanism. By using a vertical method for double-sided coating processing of PU synthetic leather, the coating effect can be guaranteed to be consistent during double-sided coating processing of PU synthetic leather, avoiding errors that affect subsequent processing.

[0007] The coating mechanism includes two coating rollers, which are placed one in front of the other. The upper ends of the coating rollers are fixedly connected to conical guide plates. The upper middle part of the conical guide plates is fixedly connected to a hemisphere. The upper end of the hemisphere is provided with a feeding hood, and the upper end of the feeding hood is fixedly connected to the transport pipe.

[0008] By using a uniform feeding structure at the top of the coating roller, the dye adhering to the coating roller is sufficiently uniform, thereby making the double-sided coating process of PU synthetic leather more uniform.

[0009] In a further embodiment, the hemisphere and the feeding hood are adapted to each other, and the hemisphere is movably installed inside the feeding hood so that the hemisphere can rotate inside the feeding hood and apply the coating as it descends, so that the coating can descend evenly onto the coating roller.

[0010] In a further embodiment, a protective cover is fixedly connected to the lower end of the feeding hood. The protective cover is adapted to the conical guide plate. The protective cover is used to protect the paint during feeding and prevent dust from falling into the guide channel.

[0011] In a further embodiment, a plurality of guide grooves are equidistantly provided on the tapered guide plate, and an annular groove is provided on the upper end of the coating roller. The annular groove and the guide groove are connected. The guide groove and the annular groove can effectively transport the coating material, so that the coating material can be evenly adhered to the surface of the coating roller, which facilitates the coating roller to coat PU synthetic leather.

[0012] In a further embodiment, a drive assembly is installed at the lower end of the coating roller. The drive assembly includes a first motor, the lower end of which is fixedly connected to a fixed frame. A first gear is fixedly connected to the output end of the first motor. A second gear meshes with one side of the first gear. The upper ends of both the first and second gears are fixedly connected to the coating roller on the same side.

[0013] The drive assembly is designed to facilitate the rotation of the coating roller, enabling it to coat PU synthetic leather. The rotating coating roller also facilitates the uniform descent of the coating material.

[0014] In a further embodiment, three combing rollers are provided on one side of the processing frame. The combing rollers are used to comb and tension the synthetic leather, and the three combing rollers are arranged in sequence. The combing roller located in the middle is positioned forward, so that the combing rollers can be used to comb and tension the PU synthetic leather, which facilitates the transportation of the PU synthetic leather and the coating process.

[0015] In a further embodiment, a mounting frame is fixedly connected to the upper end of the processing frame near the fixed frame. The upper and lower ends of the front and rear parts of the mounting frame are equipped with combing components. The combing components can comb the PU synthetic leather before coating processing to avoid bending and effectively clean the dust adhering to the front and back of the PU synthetic leather, so that the dye adhering to the surface of the PU synthetic leather is more uniform during coating.

[0016] The combing assembly includes an adjustment frame, which is slidably connected to a mounting frame. A support frame is fixedly connected to the side of the adjustment frame away from the mounting frame. A second motor is fixedly connected to one side of the support frame. A bidirectional threaded rod is fixedly connected to the output end of the second motor. A push plate is threadedly connected to the bidirectional threaded rod.

[0017] The four sets of symmetrical combing components can effectively clean and comb both sides of the PU synthetic leather, ensuring a consistent coating effect on both sides and avoiding significant errors that could affect subsequent processing.

[0018] In a further embodiment, a toothed ring is fixedly connected to the side of the push plate away from the second motor via a protective rod. A mounting rod is fixedly connected to one side of the toothed ring, and a combing brush is mounted on the mounting rod. A torsion spring is fixedly connected to the side of the toothed ring near the push plate, and the torsion spring and the push plate are fixedly connected.

[0019] In a further embodiment, a third motor is also fixedly connected to the side of the push plate away from the second motor, and a half gear is fixedly connected to the output end of the third motor, and the half gear meshes with the gear ring.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention relates to a coating device for processing PU synthetic leather:

[0022] By employing a vertical coating method, the vertically transported synthetic leather passes between two vertically placed coating rollers, allowing the rollers to coat both sides of the synthetic leather and ensuring consistent coating results. This avoids the problem of inconsistent coating strength on both sides of the synthetic leather. Furthermore, the combination of a conical guide plate and a hemispherical structure at the upper end of the coating roller with the feeding hood ensures that the coating material adheres evenly to the coating roller, resulting in a better coating effect on the synthetic leather.

[0023] By combing the synthetic leather before coating, the problem of uneven coating caused by sagging and deformation during the coating process can be avoided. The combing process also cleans the surface of the synthetic leather, reducing the possibility of dust particles adhering and preventing uneven coating. Attached Figure Description

[0024] The attached diagram is described below:

[0025] Figure 1 This is a schematic diagram of the cross-sectional structure of the main structure processing frame of the present invention;

[0026] Figure 2 This is an exploded structural diagram of the coating mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the coating roller and conical guide plate of the present invention;

[0028] Figure 4 This is a cross-sectional schematic diagram of the feeding cover and protective cover of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the four combing components of the present invention;

[0030] Figure 6 This is a schematic diagram of the combing component of the present invention;

[0031] Figure 7 This is a diagram showing the force direction of the coating material of the present invention on the coating roller.

[0032] In the diagram: 1. Processing frame; 2. Fixing frame; 3. Coating mechanism; 31. Coating roller; 311. Annular groove; 32. Conical guide plate; 321. Flow guide groove; 33. Hemisphere; 34. Feeding cover; 35. Protective cover; 4. Carding assembly; 41. Adjusting frame; 42. Support frame; 43. Second motor; 44. Bidirectional threaded rod; 45. Push plate; 46. Gear ring; 461. Mounting rod; 462. Torsion spring; 47. Third motor; 471. Half gear; 5. Receiving frame; 6. Drive assembly; 61. First motor; 62. Gear No. 1; 63. Gear No. 2; 7. Transport pipe; 8. Pump; 9. Storage frame; 10. Mounting frame; 11. Carding roller. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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. Example 1

[0034] Please see Figure 1 , Figure 2 , Figure 4 and Figure 7 This embodiment provides a coating device for processing PU synthetic leather, including a processing frame 1 and a coating mechanism 3. A fixing frame 2 is installed on one side of the processing frame 1, and the coating mechanism 3 is installed on the fixing frame 2. The upper end of the coating mechanism 3 is equipped with a transport pipe 7 for transporting coating material, and a pump 8 is installed on the transport pipe 7. The pump 8 is installed on the upper end of the fixing frame 2. One end of the transport pipe 7 is fixedly connected to a storage frame 9. The lower end of the coating mechanism 3 is equipped with a coating material receiving frame 5 for receiving the coating roller 31 falling, which saves coating material and avoids contamination of the processing frame 1.

[0035] By using a vertical method for double-sided coating of PU synthetic leather, the coating effect can be guaranteed to be consistent, avoiding errors that may affect subsequent processing.

[0036] Specifically, the coating mechanism 3 mainly includes two coating rollers 31, a conical guide plate 32, a hemisphere, and a feeding hood 34. The two coating rollers 31 are placed one in front of the other. When coating PU synthetic leather, the PU synthetic leather will pass through the middle of the two coating rollers 31. The conical guide plate 32 is fixedly connected to the upper end of both coating rollers 31. The hemisphere 33 is fixedly installed in the middle of the upper end of the conical guide plate 32. The feeding hood 34 is provided on the upper end of the hemisphere 33. The feeding hood 34 is connected to the fixing frame 2, and the upper end of the feeding hood 34 is fixedly connected to the transport pipe 7.

[0037] When the coating comes into contact with and adheres to the hemisphere 33, the coating also has a certain adhesive force and is also affected by the centrifugal force of the hemisphere 33. Therefore, after contact, some coating molecules are affected by the centrifugal force, resulting in multiple molecules breaking apart. This causes the coating to be in a state where part of it is in contact with the hemisphere 33 and part of it is separated from the hemisphere 33, and then connected to each other. In addition, the coating is affected by gravity and the rotation of the coating roller 31, which allows the coating to be continuously and uniformly fed in a downward oblique manner.

[0038] The coating process for PU synthetic leather is as follows: The pump 8 located at the upper end of the fixed frame 2 is started, causing the pump 8 to transport the dye in the storage frame 9 through the transport pipe 7 to the feeding hood 34. Since a hemisphere 33 is movably installed inside the feeding hood 34, when the lower coating roller 31 is driven to rotate by the drive component 6, the coating roller 31 will drive the upper conical guide plate 32 and the hemisphere 33 to rotate, allowing the hemisphere 33 to continuously rotate inside the feeding hood 34 and continuously adhere the coating material inside the feeding hood 34. The coating material descends along the hemisphere 33 and slowly flows downward from the upper end of the coating roller 31. Furthermore, due to the influence of the rotation of the coating roller 31, the coating material flows evenly downward from above the coating roller 31 and adheres to the coating roller 31. When the PU synthetic leather passes through the coating roller 31, it will be affected by the rotation of the coating roller 31, causing the coating material to adhere evenly to the PU synthetic leather.

[0039] When there is enough paint in the annular groove 311, the paint will overflow from the annular groove 311 and slowly flow downwards from the top of the coating roller 31 under the influence of gravity. The descending paint is then affected by the centrifugal force generated by the rotation of the coating roller 31. Figure 7 As shown, the coating material is subjected to centrifugal force from the coating roller 31. Under the action of centrifugal force, it will move outward or has a tendency to move, forming a coating strip that moves away from the coating roller 31, such as... Figure 7 As shown in Figure a. Because the coating has viscosity, there is an adhesion point between the coating and the coating roller 31. The width of this adhesion point is slightly smaller than the width of the coating strip, thus reducing the contact area between the coating strip and the coating roller 31, as shown in Figure a. Figure 7As shown in Figure b, the coating material flows downwards more quickly due to its own gravity. Since the coating roller 31 rotates, the coating material can spiral downwards along the annular surface of the coating roller 31.

[0040] By using a uniform feeding structure at the upper end of the coating roller 31, the dye adhering to the coating roller 31 is sufficiently uniform, thereby making the coating process of both sides of PU synthetic leather more uniform.

[0041] In use, if the coating material is directly fed from inside the feeding hood 34 and flows downward from the top of the coating roller 31, uneven distribution of the coating material on the coating roller 31 will inevitably occur. This will prevent the coating roller 31 from ensuring uniform coating of the PU synthetic leather during the coating process. Therefore, a hemisphere 33 is movably installed inside the feeding hood 34. When the coating roller 31 rotates, it will drive the hemisphere 33 to rotate, thereby generating centrifugal force on the coating material adhering to the hemisphere 33. This causes the hemisphere 33 to uniformly drive the coating material to accelerate downward. According to the downward flow trend of the coating material, it flows into the tapered guide plate 32, which has multiple guide grooves 321 evenly spaced on it. This allows the coating material to flow evenly from multiple positions on the top of the coating roller 31 after being guided by the guide grooves 321, thus ensuring uniform coating of the coating roller 31. In addition, an annular groove 311 is also provided on the top of the coating roller 31, so that the annular groove 311 and the guide grooves 321 are connected.

[0042] Utilizing the principle of uniform adhesion between the ballpoint pen sphere and ink, the hemisphere adheres evenly to the coating material in the feeding hood 34 during rotation and is transported to the guide groove 321. This allows the coating material to flow sequentially from multiple guide grooves 321 to the surface of the coating roller 31, ensuring that the coating material adhering to the coating roller 31 is sufficiently uniform, facilitating the coating process of PU synthetic leather using the coating roller 31.

[0043] It is worth noting that there needs to be a certain contact area and gap between the hemisphere 33 and the transport tube 7 used to transport the dye, so that the paint can only be fed into the space of this gap. This not only facilitates the paint feeding and contact with the hemisphere 33, but also plays a certain role in limiting the paint feeding, avoiding paint feeding too fast and wasting paint. In addition, in order to avoid excessive centrifugal force caused by the rotation of the coating roller 31 and the paint being thrown away, the rotation speed of the coating roller 31 should not be too fast.

[0044] When the lower coating roller 31 rotates under the drive assembly 6, it drives the upper conical guide plate 32 and hemisphere 33 to rotate. This allows the hemisphere 33 to rotate continuously within the feeding hood 34, continuously adhering to the coating material inside the feeding hood 34. The coating material descends along the hemisphere 33 and enters the multiple guide grooves 321 opened in the conical guide plate 32. Due to the rotation of the coating roller 31, the coating material flows sequentially into the guide grooves 321 and finally into the annular groove. Inside 311, when there is enough paint in the annular groove 311, the paint that continues to be affected by the guide groove 321 will overflow from each annular groove 311 and slowly flow downward from the top of the coating roller 31. And still affected by the rotation of the coating roller 31, the paint flows evenly downward from the top of the coating roller 31 and adheres to the coating roller 31. When the PU synthetic leather passes through the coating roller 31, it will be affected by the rotation of the coating roller 31, so that the paint adheres evenly to the PU synthetic leather.

[0045] In order to protect the paint flowing from the guide channel 321, a protective cover 35 is fixedly connected to the lower end of the feed cover 34, and the protective cover 35 is also set in a conical shape to match the conical guide plate 32. The protective cover 35 can protect the paint and prevent dust from contaminating the paint. Example 2

[0046] Please see Figure 1 and Figure 2 Further improvements were made based on Example 2:

[0047] In order to enable the coating roller 31 to coat the passing PU synthetic leather and to facilitate the rotation of the hemisphere 33 and the conical guide plate 32, so that the set guide groove 321 can evenly transport the coating material into the coating roller 31, a drive assembly 6 for driving the coating roller 31 to rotate is installed at the lower end of the coating roller 31. The drive assembly 6 includes a first motor 61, a first gear 62 and a second gear 63. Specifically, the lower end of the first motor 61 is fixedly connected to the fixed frame 2, and the first gear 62 is fixedly connected to the output end of the first motor 61. Then, the first gear 62 meshes with the second gear 63 on one side. The upper ends of the first gear 62 and the second gear 63 are fixedly connected to the coating roller 31 on the same side.

[0048] In use, the PU synthetic leather is first placed vertically and passed through the surface of three combing rollers 11 arranged in front and behind, so that the combing rollers 11 comb and tension the PU synthetic leather. Then, the PU synthetic leather passes between the combing components 4 arranged symmetrically in front and behind, and finally passes between the two coating rollers 31.

[0049] When coating PU synthetic leather, the PU synthetic leather is driven to pass through the coating roller 31. Before this, the drive assembly 6 is started, which causes the first motor 61 in the drive assembly 6 to drive the first gear 62 to rotate. The first gear 62 drives the second gear 63 to rotate, causing the coating roller 31 at the upper end of the first gear 62 and the second gear 63 to rotate and coat both sides of the passing PU synthetic leather. When the coating roller 31 is rotated, the conical guide plate 32 and the hemisphere 33 are also rotated, so that the paint in the feeding hood 34 can fall evenly and adhere to the coating roller 31. Example 3

[0050] Please see Figure 1 , Figure 5 and Figure 6 Further improvements were made based on Example 1:

[0051] To ensure that the PU synthetic leather can be transported vertically without falling or tilting, three combing rollers 11 are provided on one side of the processing frame 1. The three combing rollers 11 are arranged in sequence, with the combing roller 11 in the middle being positioned forward. This allows the combing rollers 11 to comb and tension the PU synthetic leather, facilitating the transportation of the PU synthetic leather and the coating process.

[0052] When coating PU synthetic leather, if the PU synthetic leather is bent or dust particles adhere to its surface during coating and transportation, the coating of the PU synthetic leather will not be uniform, and some areas of the PU synthetic leather will not be coated. Therefore, a mounting frame 10 is fixedly connected to the upper end of the side near the fixed frame 2 inside the processing frame 1. The upper and lower ends of the front and rear parts of the mounting frame 10 are equipped with combing components 4.

[0053] The combing assembly 4 consists of four sets, each including an adjustment frame 41. The adjustment frame 41 and the mounting frame 10 are slidably connected. A support frame 42 is fixedly connected to the side of the adjustment frame 41 away from the mounting frame 10. The adjustment frame 41 allows for adjustment of the position of the lower second motor 43, facilitating the adjustment of the combing brush position as needed, thus enabling the combing brush to comb the PU synthetic leather. The second motor 43 is fixedly connected to one side of the support frame 42, and a bidirectional threaded rod 44 is fixedly connected to the output end of the second motor 43. A push plate 45 is threaded onto the bidirectional threaded rod 44, and a telescopic rod is provided at one end of the push plate 45. The other end of the telescopic rod is fixedly connected to the support frame 42, which limits the position of the push plate 45 and prevents the push plate 45 from rotating without moving. The second motor 43 can drive the bidirectional threaded rod 44 to rotate, thereby driving the push plate 45 to reciprocate.

[0054] Specifically, a toothed ring 46 is fixedly connected to the push plate 45 on the side away from the second motor 43 via a protective rod, and an mounting rod 461 is fixedly connected to one side of the toothed ring 46. The combing brush is mounted on the mounting rod 461, and the toothed ring 46 can drive the mounting rod 461 to rotate, thereby enabling the combing brush at the upper end of the mounting rod 461 to comb and clean the PU synthetic leather. In addition, a third motor 47 is also fixedly connected to the push plate 45 on the side away from the second motor 43. The output end of the third motor 47 is fixedly connected to a half gear 471, and the half gear 471 meshes with the toothed ring 46. The half gear 471 can drive the toothed ring 46 to rotate, thereby enabling the toothed ring 46 to drive the mounting rod 461 to rotate, so that the combing brush can rotate and comb the PU synthetic leather.

[0055] During the coating, processing, and transportation of PU synthetic leather, the second motor 43 and the third motor 47 can be activated via an externally connected control panel. The second motor 43 drives the bidirectional threaded rod 44 connected to its output end to rotate. Since the push plate 45 is also connected to the support frame 42 via a telescopic rod on one side, the bidirectional threaded rod 44 drives the push plate 45 to move. When the bidirectional threaded rod 44 drives the push plate 45 to move away from the end of the second motor 43 on the same side, the mounting rod 461 approaches the PU synthetic leather, and the combing brush contacts the PU synthetic leather. Then, the third motor 47 is activated, driving the half gear 471 connected to its output end to rotate. The movement causes the half gear 471 to rotate to the side near the gear ring 46 and engage with it. As the half gear 471 continues to rotate, it drives the gear ring 46 on one side to rotate, which in turn drives the mounting rod 461 to rotate. The mounting rod 461 drives the combing brush to rotate and moves the combing brush in a fan shape, thereby combing the PU synthetic leather. It should be noted that the combing brushes in the combing assembly 4 located at the upper end of the mounting frame 10 rotate counterclockwise, while the combing brushes in the combing assembly 4 located at the lower end of the mounting frame 10 rotate clockwise, so that the combing brush can effectively comb the PU synthetic leather and prevent bending.

[0056] After use, in order to facilitate the continued combing of PU synthetic leather by the combing brush, a torsion spring 462 is fixedly connected to the toothed ring 46 near the push plate 45. The torsion spring 462 and the push plate 45 are fixedly connected. By restoring the torsion spring 462, the toothed ring 46 can be driven to restor, thereby driving the combing brush installed on one side to restor, which is conducive to the reuse of the combing brush.

[0057] After the combing brush finishes combing the PU synthetic leather, the bidirectional threaded rod 44 continues to rotate and drives the push plate 45 to move away from the PU synthetic leather, separating the combing brush from the PU synthetic leather. As the half gear 471 continues to rotate, it separates from the toothed ring 46. Since the half gear 471 drives the toothed ring 46 to rotate, the torsion spring 462 will deform. After the two separate, the torsion spring 462 will return to its original state and drive the toothed ring 46 to return to its original state, so that the mounting rod 461 and the combing brush can return to their original state. This makes it convenient to continue combing the PU synthetic leather when it approaches the PU synthetic leather again. The above method is used to continuously comb the PU synthetic leather, ensuring that the PU synthetic leather is combed before passing through the coating roller 31, and also cleaning the dust adhering to the PU synthetic leather.

[0058] The complete PU synthetic leather coating operation is as follows: First, the synthetic leather is vertically passed through the surface of three carding rollers 11 arranged in a front-to-back manner, allowing the carding rollers 11 to card and tension the synthetic leather. Then, the synthetic leather passes between the symmetrically arranged carding components 4, and finally between the two coating rollers 31. During the coating process, the synthetic leather is driven to pass through the coating rollers 31. Before this, the drive assembly 6 is started, causing the first motor 61 in the drive assembly 6 to drive the first gear 62 to rotate. The first gear 62 drives the second gear 63 to rotate, causing the coating rollers 31 above the first gear 62 and the second gear 63 to rotate and coat both sides of the synthetic leather. During coating, the pump 8 located at the upper end of the fixed frame 2 is started, causing the pump 8 to transport the dye in the storage frame 9 through the transport pipe 7 to the feeding hood 34. Since the feeding hood 34 has a movable hemisphere 33, when the lower coating roller 31 is driven by the drive assembly 6 to rotate... The coating roller 31 drives the upper conical guide plate 32 and hemisphere 33 to rotate, allowing the hemisphere 33 to rotate continuously within the feeding hood 34 and continuously adhere the coating material within the feeding hood 34. The coating material descends along the hemisphere 33 and enters the multiple guide grooves 321 opened within the conical guide plate 32. Due to the rotation of the coating roller 31, the coating material flows sequentially into the guide grooves 321 and finally into the annular groove 311. When there is enough coating material in the annular groove 311... The coating material, which continues to be affected by the guide groove 321, will overflow from each annular groove 311 and slowly flow downward from the top of the coating roller 31. The coating material is still affected by the rotation of the coating roller 31, so that it flows evenly downward from the top of the coating roller 31 and adheres to the coating roller 31. When the synthetic leather passes through the coating roller 31, it will be affected by the rotation of the coating roller 31, so that the coating material adheres evenly to the synthetic leather, making the coating process on both sides of the synthetic leather more uniform.

[0059] 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 coating apparatus for processing PU synthetic leather, comprising a processing frame (1) and a coating mechanism (3), characterized in that: A fixing frame (2) is installed on one side of the processing frame (1). A coating mechanism (3) is installed on the fixing frame (2). A transport pipe (7) is connected to the upper end of the coating mechanism (3). A storage frame (9) is fixedly connected to the upper end of the transport pipe (7) through a pump (8). A receiving frame (5) is installed at the lower end of the coating mechanism (3). The coating mechanism (3) includes two coating rollers (31) placed one in front of the other. The upper ends of the coating rollers (31) are fixedly connected to conical guide plates (32). The middle part of the upper end of the conical guide plates (32) is fixedly connected to a hemisphere (33). The upper end of the hemisphere (33) is provided with a feeding cover (34). The upper end of the feeding cover (34) is fixedly connected to the transport pipe (7). When the coating comes into contact with and adheres to the hemisphere (33), the coating also has a certain adhesive force and is also subject to the centrifugal force of the hemisphere (33). Therefore, after contact, some coating molecules are affected by the centrifugal force, resulting in multiple molecules breaking apart. This causes the coating to be in a state where part of it is in contact with the hemisphere (33), part of it is separated from the hemisphere (33), and then connected to each other. In addition, it is affected by gravity and the rotation of the coating roller (31), so that the coating can be continuously and uniformly fed in a downward direction.

2. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: The hemisphere (33) and the feeding hood (34) are adapted to each other, and the hemisphere (33) is movably installed inside the feeding hood (34).

3. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: The lower end of the feeding cover (34) is fixedly connected to the protective cover (35), and the protective cover (35) is compatible with the conical guide plate (32).

4. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: The tapered guide plate (32) has several guide grooves (321) evenly spaced on it, and an annular groove (311) is provided at the upper end of the coating roller (31). The annular groove (311) and the guide groove (321) are connected.

5. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: A drive assembly (6) is installed at the lower end of the coating roller (31). The drive assembly (6) includes a first motor (61), the lower end of the first motor (61) is fixedly connected to the fixed frame (2), the output end of the first motor (61) is fixedly connected to a first gear (62), the first gear (62) meshes with a second gear (63) on one side, and the upper ends of the first gear (62) and the second gear (63) are both fixedly connected to the coating roller (31) on the same side.

6. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: Three combing rollers (11) are provided on one side of the processing frame (1), and the combing rollers (11) are used to comb and tension the synthetic leather.

7. The coating apparatus for processing PU synthetic leather according to claim 1, characterized in that: The upper end of the processing frame (1) near the fixed frame (2) is fixedly connected to the mounting frame (10), and the upper and lower ends of the front and rear parts of the mounting frame (10) are equipped with combing components (4). The combing assembly (4) includes an adjustment frame (41), which is slidably connected to the mounting frame (10). A support frame (42) is fixedly connected to the side of the adjustment frame (41) away from the mounting frame (10). A second motor (43) is fixedly connected to one side of the support frame (42). A bidirectional threaded rod (44) is fixedly connected to the output end of the second motor (43). A push plate (45) is threaded onto the bidirectional threaded rod (44).

8. The coating apparatus for processing PU synthetic leather according to claim 7, characterized in that: The push plate (45) is fixedly connected to the toothed ring (46) on the side away from the second motor (43) via a protective rod. The toothed ring (46) is fixedly connected to the mounting rod (461) on one side. A combing brush is installed on the mounting rod (461). The toothed ring (46) is fixedly connected to the torsion spring (462) on the side closer to the push plate (45). The torsion spring (462) and the push plate (45) are fixedly connected.

9. The coating apparatus for processing PU synthetic leather according to claim 8, characterized in that: The push plate (45) is also fixedly connected to a third motor (47) on the side away from the second motor (43). The output end of the third motor (47) is fixedly connected to a half gear (471), and the half gear (471) meshes with the gear ring (46).

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