Leather embossing machine capable of improving wear resistance
By using up and down embossing molds and vacuum pumps in the leather embossing machine, combined with the heating and cooling system of the circulating water pipe, the problem of complex structure and high energy consumption of leather embossing machine in the prior art is solved, and wear resistance is achieved The improvement of texture clarity also simplifies equipment design and reduces energy consumption.
Patent Information
- Application Number
- CN202420619986.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-28
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-03-28
AI Technical Summary
While improving wear resistance and texture clarity, the existing leather embossing machines have complex structures, large volumes and high energy consumption. The leather needs to continue to move during heating and cooling, resulting in complex equipment design.
A leather embossing machine including heating device, cooling device and vacuum embossing device is designed. The formation of the marks is achieved through up and down embossing molds and vacuum pumps. The leather remains stationary during heating and cooling, and is improved by circulating water pipes. Heating and cooling efficiency, simplifying the structure and reducing energy consumption.
It improves the wear resistance of leather and the clarity of textures, while reducing equipment volume and energy consumption, simplifies structural design, extends heating and cooling time, and improves overall production efficiency.
Smart Images
Figure CN222205277U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of leather embossing machines, in particular to a leather embossing machine with improved wear resistance. Background Art
[0002] When leather is processed, it is often necessary to emboss it to form textures on the surface of the leather. There are two ways to form textures. One is to use a vacuum texture suction machine to absorb the leather through a vacuum texture suction roller, and form textures under the action of negative pressure. However, the textures made by the vacuum texture suction machine often have poor wear resistance, but the textures are deep, clear, and have a strong three-dimensional effect. The other is to use an embossing machine to emboss the leather by pressing the roller to form textures. Although it has high wear resistance, the textures are shallow and the three-dimensional effect is weak.
[0003] On the other hand, the vacuum graining machine and embossing machine in the prior art are both produced by rolling with rotating rollers. During the production process, the leather is always in a state of continuous movement. Before graining or embossing, the leather needs to be heated by a heating mechanism, and after graining or embossing, it needs to be cooled by a cooling roller. The continuously moving leather stays on the heating mechanism and the cooling roller for a short time, and it is often necessary to lengthen the length of the heating mechanism to extend the heating time of the leather to ensure that the specified temperature is reached before graining or embossing. By increasing the number of cooling rollers to extend the cooling time of the leather, the cooling speed is increased to ensure that cooling is completed before winding or cutting. This results in the vacuum graining machine and the embossing machine having a complex structure, large size, and high energy consumption, so it is necessary to improve them. Utility Model Content
[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a leather embossing machine with improved wear resistance, which improves the wear resistance of the leather while ensuring the clarity and thickness of the texture, simplifies the structure, and reduces the volume and energy consumption.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a leather embossing machine with improved wear resistance, comprising a machine base and a heating device, a cooling device and a vacuum embossing device arranged on the machine base, the heating device is arranged on the front side of the vacuum embossing device, the cooling device is arranged on the rear side of the vacuum embossing device, the heating device comprises two heating rollers and a plurality of heating tubes, each heating tube is fixedly installed on the front part of the machine base, each heating tube is arranged at intervals along the moving direction of the leather, two heating rollers are rotatably installed on the machine base and are located below each heating tube, and the two heating rollers are arranged side by side at intervals;
[0006] The vacuum embossing device comprises an embossing drive mechanism, an upper embossing mold, a lower embossing mold and a vacuum pump, wherein the lower embossing mold is fixedly installed in the middle of the machine base, the upper embossing mold is slidably installed above the lower embossing mold, the embossing drive mechanism is transmission-connected with the upper embossing mold, the upper embossing mold and the lower embossing mold are movably abutted against each other, and the upper embossing mold and / or the lower embossing mold are connected to the vacuum pump;
[0007] The cooling device comprises a plurality of cooling rollers, each of which is rotatably mounted on the rear of a machine base, and two adjacent cooling rollers are arranged alternately up and down.
[0008] In a further technical solution, the upper embossing mold includes an upper pressing block and an upper concave plate, the upper pressing block is transmission-connected to the embossing drive mechanism, an upper vacuum chamber with an opening facing downward is provided at the lower part of the upper pressing block, and the upper concave plate is arranged at the lower part of the upper vacuum chamber;
[0009] The lower embossing die comprises a lower pressing block and a lower convex plate. The lower pressing block is fixedly installed in the middle of the machine base. The upper part of the lower pressing block is provided with a lower vacuum chamber with an opening facing upward. The lower convex plate is arranged at the upper part of the lower vacuum chamber. The upper concave plate and the lower convex plate are abutted against each other.
[0010] The vacuum pump is connected to the upper vacuum chamber and the lower vacuum chamber respectively; the upper part of the lower convex plate is provided with an upwardly protruding convex pattern, and a plurality of lower adsorption holes connected to the lower vacuum chamber are provided between adjacent convex patterns; the lower part of the upper concave plate is provided with a groove corresponding to the convex pattern, and a plurality of upper adsorption holes connected to the upper vacuum chamber are provided between adjacent grooves.
[0011] In a further technical solution, the embossing drive mechanism includes an embossing drive cylinder, an embossing connecting rod and an embossing elastic member. The embossing drive cylinder is fixedly installed on the machine base, the upper end of the embossing connecting rod is fixedly connected to the piston rod of the embossing drive cylinder, a connecting slide hole is opened on the upper part of the upper pressure block, the lower end of the embossing connecting rod is slidably installed in the connecting slide hole, the embossing elastic member is embedded in the connecting slide hole, the upper end of the embossing elastic member abuts against the lower end of the embossed connecting rod, and the lower end abuts against the lower wall of the connecting slide hole.
[0012] In a further technical solution, a leveling roller assembly is respectively provided on the front and rear sides of the upper pressing block, and the leveling roller assembly includes a leveling roller and two connecting arms. The upper ends of the two connecting arms are respectively rotatably installed on the left and right sides of the lower part of the upper pressing block, and the left and right ends of the leveling roller are respectively rotatably connected to the lower ends of the two connecting arms.
[0013] In a further technical solution, a torsion spring for applying downward pressure to the leveling roller is provided at the upper end of the connecting arm, and rounded corners are provided on the front and rear sides of the lower part of the upper pressing block and the front and rear sides of the upper part of the lower pressing block.
[0014] In a further technical solution, the heating device is further provided with a heat reflection cover, the inner wall of the heat reflection cover is provided with a heat reflection film, the heat reflection cover is fixedly installed on the machine base, the opening of the heat reflection cover faces the heating roller, and each heating tube is respectively arranged in the heat reflection cover.
[0015] In a further technical solution, the cooling device is also provided with a chiller, a circulating water pipe and a heat preservation roller. The chiller is fixedly installed on the machine base, the heat preservation roller is rotatably installed on the machine base and is located between the heating roller and the vacuum embossing device, the interior of the heat preservation roller and at least one cooling roller is hollow, the first end of the circulating water pipe is connected to the heat preservation roller, and the second end is connected to the cooling roller, the water inlet of the chiller is connected to the heat preservation roller, and the water outlet is connected to the cooling roller.
[0016] In a further technical solution, the interiors of the two heating rollers are hollow, one end of the two heating rollers is respectively connected to the first end of the circulating water pipe, and the other end of the two heating rollers is respectively connected to the water inlet of the chiller.
[0017] In a further technical solution, each cooling roller is hollow inside, one end of each cooling roller is connected to the second end of the circulating water pipe, and the other end is connected to the water outlet of the chiller.
[0018] After adopting the above structure, the advantages of the utility model compared with the prior art are: the leather is clamped between the upper embossing mold and the lower embossing mold by moving the upper embossing mold up and down, and embossing is performed by pressure. At the same time, negative pressure is generated in the upper embossing mold and the lower embossing mold by a vacuum pump, and the lines are sucked while embossing, thereby improving the clarity and depth of the lines while improving the wear resistance and scratch resistance of the leather; during the embossing process, the leather remains stationary, so that it can stay on the heating device and the cooling device to extend the heating and cooling time, without increasing the length of the heating device and the number of cooling rollers, reducing the volume and reducing energy consumption; cooling water is injected into the cooling roller to reduce the temperature of the cooling roller, and the heated cooling water enters the heating roller and the insulation roller through the circulating water pipe, thereby playing an auxiliary heating effect, and the cooling water then flows into the chiller for cooling and re-enters the cooling roller, and circulates in sequence, further improving the heating and cooling speed and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 It is a cross-sectional view of the utility model;
[0022] Figure 3 The utility model Figure 2 A magnified view of part A;
[0023] Figure 4 It is a schematic diagram of the working state of the utility model.
[0024] In the figure:
[0025] 1 base;
[0026] 2 heating device, 21 heating roller, 22 heating tube, 23 heat reflection cover;
[0027] 3 cooling device, 31 cooling roller;
[0028] 4 vacuum embossing device, 41 embossing driving cylinder, 42 embossing connecting rod, 43 embossing elastic member, 44 upper embossing mold, 441 upper pressing block, 442 upper concave plate, 443 upper vacuum chamber, 444 groove, 445 upper adsorption hole, 446 connecting sliding hole, 45 lower embossing mold, 451 lower pressing block, 452 lower convex plate, 453 lower vacuum chamber, 454 convex pattern, 455 lower adsorption hole;
[0029] 5 leveling roller assembly, 51 leveling roller, 52 connecting arm;
[0030] 61 chiller, 62 circulating water pipe, 63 insulation roller. DETAILED DESCRIPTION
[0031] The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.
[0032] A leather embossing machine for improving wear resistance, such as Figures 1 to 4 As shown, it includes a machine base 1 and a heating device 2, a cooling device 3 and a vacuum embossing device 4 arranged on the machine base 1, the heating device 2 is arranged on the front side of the vacuum embossing device 4, and the cooling device 3 is arranged on the rear side of the vacuum embossing device 4, characterized in that: the heating device 2 includes two heating rollers 21 and a plurality of heating tubes 22, each heating tube 22 is fixedly installed on the front part of the machine base 1, each heating tube 22 is arranged at intervals along the moving direction of the leather, two heating rollers 21 are rotatably installed on the machine base 1 and are located below each heating tube 22, and the two heating rollers 21 are arranged side by side at intervals; vacuum embossing The device 4 includes an embossing drive mechanism, an upper embossing mold 44, a lower embossing mold 45 and a vacuum pump. The lower embossing mold 45 is fixedly installed in the middle of the machine base 1, and the upper embossing mold 44 is slidably installed above the lower embossing mold 45. The embossing drive mechanism is transmission-connected to the upper embossing mold 44. The upper embossing mold 44 and the lower embossing mold 45 are movably abutted against each other. The upper embossing mold 44 and / or the lower embossing mold 45 are connected to the vacuum pump; the cooling device 3 includes a plurality of cooling rollers 31, each of which is rotatably installed at the rear of the machine base 1, and two adjacent cooling rollers 31 are staggered up and down.
[0033] Traditional leather is usually patterned by embossing or suction patterning, but the pattern formed by suction patterning has poor wear resistance, the pattern formed by embossing has a shallow depth and poor clarity, and the leather will not stop and keep moving, so it is necessary to lengthen the heating device 2 and the cooling device 3 to ensure that the leather reaches a suitable temperature for embossing and cooling. The structure is complex, the volume is large, and the energy consumption is high. The utility model drives the upper embossing mold 44 to move up and down through the embossing drive mechanism to clamp the leather between the upper embossing mold 44 and the lower embossing mold 45, and embosses by pressure. At the same time, a vacuum pump is used to generate negative pressure in the upper embossing mold 44 and the lower embossing mold 45, and suction patterning is performed while embossing, thereby improving the clarity and depth of the pattern while improving the wear resistance and scratch resistance of the leather; during the embossing process, the leather remains stationary, so that it can stay on the heating device 2 and the cooling device 3 to extend the heating and cooling time, and there is no need to lengthen the length of the heating device 2 and the number of cooling rollers 31, thereby reducing the volume and reducing energy consumption.
[0034] Specifically, the upper embossing mold 44 includes an upper pressing block 441 and an upper concave plate 442, the upper pressing block 441 is transmission-connected to the embossing drive mechanism, the lower part of the upper pressing block 441 is provided with an upper vacuum chamber 443 with an opening facing downward, and the upper concave plate 442 is arranged at the lower part of the upper vacuum chamber 443; the lower embossing mold 45 includes a lower pressing block 451 and a lower convex plate 452, the lower pressing block 451 is fixedly installed at the middle part of the machine base 1, the upper part of the lower pressing block 451 is provided with a lower vacuum chamber 453 with an opening facing upward, and the lower convex plate 452 is arranged at the lower vacuum chamber At the upper part of the chamber 453, the upper concave plate 442 and the lower convex plate 452 are abutted against each other; the vacuum pump is connected to the upper vacuum chamber 443 and the lower vacuum chamber 453 respectively, the upper part of the lower convex plate 452 is provided with an upwardly protruding convex pattern 454, and a plurality of lower adsorption holes 455 connected to the lower vacuum chamber 453 are provided between adjacent convex patterns 454; the lower part of the upper concave plate 442 is provided with a groove 444 corresponding to the convex pattern 454, and a plurality of upper adsorption holes 445 connected to the upper vacuum chamber 443 are provided between adjacent grooves 444. The vacuum pump evacuates the upper vacuum chamber 443 and the lower vacuum chamber 453 to generate negative pressure, and the leather is adsorbed on the upper concave plate 442 and the lower convex plate 452 through the upper adsorption holes 445 and the lower adsorption holes 455 to form texture. At the same time, the upper concave plate 442 and the lower convex plate 452 are driven by the embossing drive mechanism to tightly clamp the leather and emboss at the same time. The adsorption and embossing work together to form the texture. By replacing the upper concave plate 442 and the lower convex plate 452 with different convex patterns 454 and grooves 444, leather with different textures can be produced, and replacement is convenient.
[0035] Specifically, the embossing drive mechanism includes an embossing drive cylinder 41, an embossing connecting rod 42 and an embossing elastic member 43. The embossing drive cylinder 41 is fixedly installed on the machine base 1. The upper end of the embossing connecting rod 42 is fixedly connected to the piston rod of the embossing drive cylinder 41. A connecting slide hole 446 is provided on the upper part of the upper pressing block 441. The lower end of the embossing connecting rod 42 is slidably installed in the connecting slide hole 446. The embossing elastic member 43 is embedded in the connecting slide hole 446. The upper end of the embossing elastic member 43 abuts against the lower end of the embossing connecting rod 42, and the lower end abuts against the lower wall of the connecting slide hole 446. The embossing drive cylinder 41 is transmission-connected with the upper pressing block 441 through the embossing connecting rod 42. The upper pressing block 441 slides relative to the embossing connecting rod 42. When embossing, the embossing elastic member 43 can give the upper embossing mold 44 an upward elastic stroke, so that the leather has a certain buffer, prevents the leather from being broken due to excessive pressure, and improves reliability and stability. Preferably, the upper pressing block 441 is transmission-connected with a plurality of embossing driving mechanisms to improve the driving force and the force uniformity of the upper pressing block 441 .
[0036] Specifically, a flattening roller assembly 5 is respectively provided on the front and rear sides of the upper pressing block 441, and the flattening roller assembly 5 includes a flattening roller 51 and two connecting arms 52. The upper ends of the two connecting arms 52 are respectively rotatably mounted on the left and right sides of the lower part of the upper pressing block 441, and the left and right ends of the flattening roller 51 are respectively rotatably connected to the lower ends of the two connecting arms 52. The leather is flattened by the two flattening roller assemblies 5 provided in the front and rear to prevent the leather from wrinkling during embossing and absorbing, thereby improving the texture production effect.
[0037] Specifically, the upper end of the connecting arm 52 is provided with a torsion spring for applying downward pressure to the leveling roller 51, and rounded corners are provided on both the front and rear sides of the lower part of the upper pressing block 441 and the front and rear sides of the upper part of the lower pressing block 451. The torsion spring applies a force to the leveling roller 51 to move downward, thereby increasing the pressure of the leveling roller 51 on the leather, further improving the flatness of the leather, and preventing the leather from being scratched by the rounded corners, thereby improving the yield rate.
[0038] Specifically, the heating device 2 is further provided with a heat reflection cover 23, the inner wall of which is provided with a heat reflection film, the heat reflection cover 23 is fixedly mounted on the machine base 1, the opening of the heat reflection cover 23 faces the heating roller 21, and each heating tube 22 is respectively arranged in the heat reflection cover 23. The heat of the heating tube 22 is concentrated on the leather through the heat reflection cover 23, so as to prevent waste caused by heat loss and improve heating efficiency.
[0039] Specifically, the cooling device 3 is further provided with a chiller 61, a circulating water pipe 62 and a heat preservation roller 63. The chiller 61 is fixedly mounted on the machine base 1, the heat preservation roller 63 is rotatably mounted on the machine base 1 and is located between the heating roller 21 and the vacuum embossing device 4. The heat preservation roller 63 and at least one cooling roller 31 are hollow inside. The first end of the circulating water pipe 62 is connected to the heat preservation roller 63, and the second end is connected to the cooling roller 31. The water inlet of the chiller 61 is connected to the heat preservation roller 63, and the water outlet is connected to the cooling roller 31. Cooling water is injected into the cooling roller 31 to reduce the temperature of the cooling roller, and the heated cooling water enters the heat preservation roller 63 through the circulating water pipe 62, thereby preventing the leather from losing heat before being removed from the heating device 2 and entering the vacuum embossing device 4, and playing a heat preservation role. The cooling water then flows into the chiller 61 for cooling and re-enters the cooling roller 31, and circulates in sequence, thereby increasing the cooling speed and reducing energy consumption.
[0040] Specifically, the interiors of the two heating rollers 21 are hollow, and one end of the two heating rollers 21 is respectively connected to the first end of the circulating water pipe 62, and the other end is respectively connected to the water inlet of the chiller 61. The cooling water heated in the cooling roller 31 flows into the heating roller 21, thereby heating the heating roller 21 to assist in heating the leather and further improve the heating efficiency.
[0041] Specifically, each cooling roller 31 is hollow inside, one end of each cooling roller 31 is connected to the second end of the circulating water pipe 62, and the other end is connected to the water outlet of the chiller 61. Cold water is passed into each cooling roller 31 to increase the cooling speed.
[0042] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.
Claims
1. A leather embossing machine for improving wear resistance, comprising a machine base (1) and a heating device (2), a cooling device (3) and a vacuum embossing device (4) arranged on the machine base (1), wherein the heating device (2) is arranged on the front side of the vacuum embossing device (4), and the cooling device (3) is arranged on the rear side of the vacuum embossing device (4), characterized in that: The heating device (2) comprises two heating rollers (21) and a plurality of heating tubes (22), each heating tube (22) being fixedly mounted on the front of the machine base (1), each heating tube (22) being arranged at intervals along the moving direction of the leather, two heating rollers (21) being rotatably mounted on the machine base (1) and being located below each heating tube (22), and the two heating rollers (21) being arranged side by side at intervals; The vacuum embossing device (4) comprises an embossing drive mechanism, an upper embossing mold (44), a lower embossing mold (45) and a vacuum pump. The lower embossing mold (45) is fixedly mounted on the middle part of the machine base (1). The upper embossing mold (44) is slidably mounted above the lower embossing mold (45). The embossing drive mechanism is transmission-connected to the upper embossing mold (44). The upper embossing mold (44) and the lower embossing mold (45) are movably abutted against each other. The upper embossing mold (44) and / or the lower embossing mold (45) are connected to the vacuum pump. The cooling device (3) comprises a plurality of cooling rollers (31), each cooling roller (31) is rotatably mounted on the rear portion of the machine base (1), and two adjacent cooling rollers (31) are arranged alternately up and down.
2. A leather embossing machine for improving wear resistance according to claim 1, characterized in that: The upper embossing mold (44) comprises an upper pressing block (441) and an upper concave plate (442); the upper pressing block (441) is drivingly connected to the embossing drive mechanism; an upper vacuum chamber (443) with an opening facing downward is provided at the lower portion of the upper pressing block (441); and the upper concave plate (442) is arranged at the lower portion of the upper vacuum chamber (443); The lower embossing mold (45) comprises a lower pressing block (451) and a lower convex plate (452); the lower pressing block (451) is fixedly mounted on the middle part of the machine base (1); a lower vacuum chamber (453) with an opening facing upward is provided on the upper part of the lower pressing block (451); the lower convex plate (452) is arranged on the upper part of the lower vacuum chamber (453); and the upper concave plate (442) is abutted against the lower convex plate (452); The vacuum pump is connected to the upper vacuum chamber (443) and the lower vacuum chamber (453) respectively; the upper portion of the lower convex plate (452) is provided with an upwardly protruding convex pattern (454); a plurality of lower adsorption holes (455) connected to the lower vacuum chamber (453) are provided between adjacent convex patterns (454); the lower portion of the upper concave plate (442) is provided with a groove (444) corresponding to the convex pattern (454); a plurality of upper adsorption holes (445) connected to the upper vacuum chamber (443) are provided between adjacent grooves (444).
3. A leather embossing machine for improving wear resistance according to claim 2, characterized in that: The embossing driving mechanism comprises an embossing driving cylinder (41), an embossing connecting rod (42) and an embossing elastic member (43); the embossing driving cylinder (41) is fixedly mounted on the machine base (1); the upper end of the embossing connecting rod (42) is fixedly connected to the piston rod of the embossing driving cylinder (41); a connecting sliding hole (446) is provided on the upper part of the upper pressing block (441); the lower end of the embossing connecting rod (42) is slidably mounted in the connecting sliding hole (446); the embossing elastic member (43) is embedded in the connecting sliding hole (446); the upper end of the embossing elastic member (43) abuts against the lower end of the embossing connecting rod (42); and the lower end abuts against the lower wall of the connecting sliding hole (446).
4. The leather embossing machine for improving wear resistance according to claim 3, characterized in that: A leveling roller assembly (5) is respectively provided on the front and rear sides of the upper pressing block (441), and the leveling roller assembly (5) comprises a leveling roller (51) and two connecting arms (52), the upper ends of the two connecting arms (52) are respectively rotatably mounted on the left and right sides of the lower part of the upper pressing block (441), and the left and right ends of the leveling roller (51) are respectively rotatably connected to the lower ends of the two connecting arms (52).
5. The leather embossing machine for improving wear resistance according to claim 4, characterized in that: The upper end of the connecting arm (52) is provided with a torsion spring for applying downward pressure to the leveling roller (51), and the front and rear sides of the lower part of the upper pressing block (441) and the front and rear sides of the upper part of the lower pressing block (451) are both provided with rounded corners.
6. The leather embossing machine for improving wear resistance according to claim 1, characterized in that: The heating device (2) is also provided with a heat reflection cover (23), the inner wall of the heat reflection cover (23) is provided with a heat reflection film, the heat reflection cover (23) is fixedly mounted on the machine base (1), the opening of the heat reflection cover (23) faces the heating roller (21), and each of the heating tubes (22) is respectively arranged in the heat reflection cover (23).
7. A leather embossing machine for improving wear resistance according to any one of claims 1 to 6, characterized in that: The cooling device (3) is also provided with a chiller (61), a circulating water pipe (62) and a heat preservation roller (63); the chiller (61) is fixedly mounted on the machine base (1); the heat preservation roller (63) is rotatably mounted on the machine base (1) and is located between the heating roller (21) and the vacuum embossing device (4); the interiors of the heat preservation roller (63) and at least one of the cooling rollers (31) are hollow; the first end of the circulating water pipe (62) is connected to the heat preservation roller (63) and the second end is connected to the cooling roller (31); the water inlet of the chiller (61) is connected to the heat preservation roller (63) and the water outlet is connected to the cooling roller (31).
8. The leather embossing machine for improving wear resistance according to claim 7, characterized in that: The interiors of the two heating rollers (21) are hollow, and one end of the two heating rollers (21) is respectively connected to the first end of the circulating water pipe (62), and the other end is respectively connected to the water inlet of the chiller (61).
9. The leather embossing machine for improving wear resistance according to claim 8, characterized in that: Each of the cooling rollers (31) is hollow inside, and one end of each cooling roller (31) is respectively connected to the second end of the circulating water pipe (62), and the other end is respectively connected to the water outlet of the chiller (61).