Motor-driven linkage for web weaving machines

Abstract

The present invention discloses a motor-driven linkage device for a mesh weaving machine, which includes a mesh weaving machine device and a mounting frame. A post-processing mechanism is arranged in front of the mesh weaving machine device, and the post-processing mechanism includes a carrier frame, a lower smoothing roller and an upper smoothing roller. Both ends of the lower smoothing roller and both ends of the upper smoothing roller are movably connected to the carrier frame through bearings, and a driving motor is arranged on the right side of the post-processing mechanism. The present invention can drive the pre-processing structure and the post-processing mechanism to operate at the same time through the driving motor, and the processing work before and after the wire mesh is woven can be realized through one driving source, which can reduce the error caused by multiple driving devices, and the pre-processing structure and the post-processing mechanism can also realize functional linkage, which can improve the quality of the woven mesh.

Description

Technical Field

[0001] The invention relates to the technical field of net weaving machines, in particular to a motor-driven linkage device for net weaving machines. Background Art

[0002] The net weaving machine is a mechanical device for processing knotted or knotless nets. When the net weaving machine is in use, it needs to be driven by the heald frame and the winding frame to realize the weaving of the net.

[0003] For example, the prior art with publication number CN111561550A discloses a single-motor driven linkage system for a weaving machine, which can replace multiple driving devices with a single driving motor to drive the heald frame and the winding frame. When the equipment fails during use, the staff can pull out the limit pin, thereby automatically disconnecting the connecting block and the locking plate.

[0004] However, in actual use, the quality of the mesh woven by the mesh weaving machine does not only depend on the operation of the mesh weaving machine, but also on the quality of the steel wire raw materials. The existing mesh weaving machines can usually only perform weaving operations and cannot pre-treat the steel wire entering the equipment before weaving, so that steel wire with burrs, protrusions and other defects on the surface are easily mixed in and woven into the mesh, thereby affecting the quality of the finished mesh. In addition, after the existing mesh weaving machines weave the mesh, they generally use a roller winding method to collect the finished product, but due to the characteristics of the steel wire mesh, it is often difficult to collect it into a roll flat and fit, and it is easy to have local bulges and depressions.

[0005] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing structure and shortcomings, and provides a motor-driven linkage device for a web weaving machine. Summary of the invention

[0006] The object of the present invention is to provide a motor-driven linkage device for a web weaving machine to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A motor-driven linkage device for a web weaving machine, comprising a web weaving machine device and a mounting frame, a post-processing mechanism is arranged in front of the web weaving machine device, and the post-processing mechanism comprises a bearing frame, a lower smoothing roller and an upper smoothing roller, and both ends of the lower smoothing roller and the upper smoothing roller are movably connected to the bearing frame through bearings, a driving motor is arranged on the right side of the post-processing mechanism, and the output shaft of the driving motor is fixedly connected to a first transmission assembly through a coupling, the first transmission assembly comprises a transmission rod, a first gear and a second gear, and one end of the transmission rod is connected to the output shaft of the driving motor through a coupling, and the other end of the transmission rod passes through the bearing frame and is fixedly connected to the right end of the lower smoothing roller, the first gear and the second gear are meshed, and the first gear is sleeved on the right end of the lower smoothing roller, and the second gear is sleeved on the right end of the upper smoothing roller, the mounting frame is fixed on the top of the web weaving machine device, and a second transmission assembly is arranged on the inner side of the mounting frame, and the outer wall of the second transmission assembly is connected to a pre-processing structure, and a third transmission assembly is arranged on the left side of the mounting frame;

[0009] The pretreatment structure includes an inner ring sleeve, a telescopic rod and a spring, the outer surface of the inner ring sleeve is fixedly connected to the telescopic rod, and the outer surface of the inner ring sleeve is fixedly connected to the spring, and the spring is wound around the outer side of the telescopic rod, the number of the telescopic rods and the number of the springs are both six, and each of the telescopic rods and each spring constitutes a group, and the six groups of telescopic rods and springs are arranged in a circular array on the outer surface of the inner ring sleeve;

[0010] The outer grinding wheel is connected to the outer side of the inner ring sleeve through a telescopic rod and a spring, and a grinding groove is provided on the outer surface of the outer grinding wheel. Silicone hemispherical convexities are equidistantly arranged on the inner surface of the outer grinding wheel, and induction contacts are arranged at the convex points of the silicone hemispherical convexities.

[0011] Furthermore, there are two supporting frames, and the lower smoothing roller and the upper smoothing roller are arranged in parallel between the two supporting frames.

[0012] Furthermore, the lower smoothing roller and the upper smoothing roller rotate synchronously via a first gear and a second gear, and the shape and size of the first gear are completely consistent with the shape and size of the second gear.

[0013] Furthermore, the second transmission assembly includes a first rotating rod and a third gear, both ends of the first rotating rod are movably connected to the inner wall of the mounting frame through bearings, and the outer wall of the first rotating rod is fixedly connected to the third gear.

[0014] Furthermore, the second transmission assembly includes a second rotating rod, a fourth gear, and a driven bevel gear, one end of the second rotating rod is movably connected to the inner wall of the mounting frame through a bearing, the outer wall of the second rotating rod is fixedly connected to the fourth gear, and the other end of the second rotating rod is welded to the driven bevel gear.

[0015] Furthermore, the second rotating rod is arranged directly above the first rotating rod, and the outer wall of the second rotating rod and the outer wall of the first rotating rod are both sleeved with two of the pre-treatment structures, and the second rotating rod is arranged in parallel with the first rotating rod.

[0016] Furthermore, the third transmission assembly includes a fixed frame, a third rotating rod, an active bevel gear and a first sprocket. The fixed frame is welded to the left outer wall of the mounting frame, and one side of the fixed frame is movably connected to the third rotating rod through a bearing, and the end of the third rotating rod is fixedly connected to the active bevel gear, and the outer wall of the third rotating rod is fixedly connected to the first sprocket.

[0017] Furthermore, the third transmission assembly also includes a second sprocket and a transmission chain, the second sprocket is sleeved on the transmission rod, the outer wall of the second sprocket is meshedly connected with the transmission chain, and the second sprocket is connected to the first sprocket through the transmission chain.

[0018] The present invention provides a motor-driven linkage device for a web weaving machine, which has the following beneficial effects:

[0019] 1. The present invention is provided with a first transmission assembly, so that the driving motor can drive the lower smoothing roller and the upper smoothing roller to rotate at the same time. The mesh cloth woven by the mesh weaving machine passes between the lower smoothing roller and the upper smoothing roller, which can not only guide the discharge of the mesh cloth, but also smooth the mesh cloth. Combined with the design of obvious diameter difference between the lower smoothing roller and the upper smoothing roller, the upper smoothing roller and the lower smoothing roller have different smoothing effects on the upper and lower sides of the mesh cloth at the same rotation speed, thereby further improving the overall smoothing effect of the mesh cloth.

[0020] 2. The present invention is provided with a second transmission assembly and a third transmission assembly, so that while the driving motor drives the post-processing mechanism to operate, it can drive the pre-processing structure to rotate via the third transmission assembly and the second transmission assembly, so that the surface of the steel wire is polished by the rotating outer grinding wheel, and elastic polishing is achieved by cooperating with the telescopic rod and the spring to achieve elastic polishing, which not only removes burrs on the surface of the steel wire, but also effectively avoids damage to the steel wire caused by excessive rigid polishing. In addition, when there are abnormal protrusions and bumps on the surface of the steel wire, the inner ring sleeve will abut against the sensing contact on the silicone hemispherical protrusion, thereby stopping the mesh weaving machine device and the driving motor to suspend the mesh weaving work, effectively avoiding the steel wire with defects such as protrusions and bumps on the surface from entering the mesh weaving machine, so that the steel wire surface can be inspected while the steel wire is being polished and pre-treated, and low-quality steel wire can be avoided from entering the mesh weaving machine, which helps to ensure the quality of the mesh woven by the mesh weaving machine.

[0021] 3. The present invention drives the pre-processing structure and the post-processing mechanism at the same time through a driving motor to operate. Only one driving source is needed to realize the processing work before and after the weaving of the wire mesh. On the one hand, it achieves the effect of saving electric energy, and on the other hand, it reduces the error caused by multiple driving devices. In addition, there is a functional linkage between the pre-processing structure and the post-processing mechanism, which can significantly improve the quality of the woven wire mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the motor-driven linkage device for a web weaving machine of the present invention;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the post-processing mechanism in the present invention;

[0024] Figure 3 It is a partial cross-sectional schematic diagram of the carrier frame in the present invention;

[0025] Figure 4 It is a schematic diagram of the connection between the mounting frame and the second transmission assembly structure in the present invention;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of the pretreatment structure in the present invention;

[0027] Figure 6 It is a schematic diagram of the structural decomposition of the pretreatment structure in the present invention.

[0028] In the figure: 1. weaving machine device; 2. post-processing mechanism; 21. supporting frame; 22. lower smoothing roller; 23. upper smoothing roller; 3. driving motor; 4. first transmission assembly; 41. transmission rod; 42. first gear; 43. second gear; 5. mounting frame; 6. second transmission assembly; 61. first rotating rod; 62. third gear; 63. second rotating rod; 64. fourth gear; 65. driven bevel gear; 7. pre-processing structure; 71. inner ring sleeve; 72. telescopic rod; 73. spring; 74. outer grinding wheel; 75. grinding groove; 76. silicone hemispherical convex; 77. induction contact; 8. third transmission assembly; 81. fixing frame; 82. third rotating rod; 83. active bevel gear; 84. first sprocket; 85. second sprocket; 86. transmission chain. DETAILED DESCRIPTION

[0029] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0030] like Figure 1-Figure 3 As shown, the motor-driven linkage device for a web weaving machine of the present invention comprises a web weaving machine device 1 and a mounting frame 5 , and a post-processing mechanism 2 is arranged directly in front of the web weaving machine device 1 .

[0031] The post-processing mechanism 2 includes a carrier frame 21, a lower smoothing roller 22 and an upper smoothing roller 23, and both ends of the lower smoothing roller 22 and the upper smoothing roller 23 are movably connected to the carrier frame 21 through bearings. There are two carrier frames 21, and the lower smoothing roller 22 and the upper smoothing roller 23 are arranged in parallel between the two carrier frames 21.

[0032] A driving motor 3 is arranged on the right side of the post-processing mechanism 2, and an output shaft of the driving motor 3 is fixedly connected to a first transmission assembly 4 via a coupling.

[0033] In some embodiments, the first transmission assembly 4 includes a transmission rod 41, a first gear 42 and a second gear 43, and one end of the transmission rod 41 is connected to the output shaft of the driving motor 3 through a coupling, and the other end of the transmission rod 41 passes through the carrier frame 21 and is fixedly connected to the right end of the lower smoothing roller 22, the first gear 42 and the second gear 43 are meshed, and the first gear 42 is sleeved on the right end of the lower smoothing roller 22, and the second gear 43 is sleeved on the right end of the upper smoothing roller 23, the lower smoothing roller 22 and the upper smoothing roller 23 maintain synchronous rotation through the first gear 42 and the second gear 43, and the shape and size of the first gear 42 are exactly the same as the shape and size of the second gear 43.

[0034] The specific operation is as follows: the mesh weaving machine device 1 is used to weave the steel wire into a mesh cloth, and the woven mesh cloth is passed between the lower smoothing roller 22 and the upper smoothing roller 23, and the drive motor 3 is started at the same time. The drive motor 3 drives the transmission rod 41 to rotate, thereby driving the lower smoothing roller 22 and the first gear 42 to rotate, and the upper smoothing roller 23 is driven to rotate through the meshing transmission of the first gear 42 and the second gear 43. The rotating lower smoothing roller 22 and the upper smoothing roller 23 can not only guide the discharge of the mesh cloth, but also smooth the mesh cloth to improve the quality of the finished mesh cloth woven by the mesh weaving machine device 1. In addition, by designing the diameter of the upper smoothing roller 23 to be significantly smaller than the diameter of the lower smoothing roller 22, the upper smoothing roller 23 and the lower smoothing roller 22 have different smoothing effects on the upper and lower sides of the mesh cloth at the same rotation speed, thereby further improving the overall smoothing effect of the mesh cloth.

[0035] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the mounting frame 5 is fixed on the top of the net weaving machine device 1 , and a second transmission assembly 6 is arranged on the inner side of the mounting frame 5 .

[0036] The second transmission assembly 6 includes a first rotating rod 61 and a third gear 62. Both ends of the first rotating rod 61 are movably connected to the inner wall of the mounting frame 5 through bearings, and the outer wall of the first rotating rod 61 is fixedly connected to the third gear 62. The second transmission assembly 6 includes a second rotating rod 63, a fourth gear 64, and a driven bevel gear 65. One end of the second rotating rod 63 is movably connected to the inner wall of the mounting frame 5 through a bearing, and the outer wall of the second rotating rod 63 is fixedly connected to the fourth gear 64, and the other end of the second rotating rod 63 is welded to the driven bevel gear 65. The second rotating rod 63 is arranged directly above the first rotating rod 61, and the outer walls of the second rotating rod 63 and the outer walls of the first rotating rod 61 are both provided with two pretreatment structures 7, and the second rotating rod 63 is arranged parallel to the first rotating rod 61.

[0037] It should be noted that, in the present invention, a pre-processing structure 7 may also be provided on the outer wall of the second transmission assembly 6 .

[0038] Specifically, the pretreatment structure 7 includes an inner ring sleeve 71, a telescopic rod 72 and a spring 73. The outer surface of the inner ring sleeve 71 is fixedly connected to the telescopic rod 72, and the outer surface of the inner ring sleeve 71 is fixedly connected to the spring 73, and the spring 73 is wound around the outer side of the telescopic rod 72. The number of telescopic rods 72 and the number of springs 73 are both six, and each telescopic rod 72 and each spring 73 form a group, and the six groups of telescopic rods 72 and springs 73 are arranged in a ring array on the outer surface of the inner ring sleeve 71. The pretreatment structure 7 also includes an outer grinding wheel 74, a grinding groove 75, a silicone hemispherical convex 76 and a sensing contact 77. The outer grinding wheel 74 is connected to the outer side of the inner ring sleeve 71 through the telescopic rod 72 and the spring 73, and the outer surface of the outer grinding wheel 74 is provided with a grinding groove 75, the inner surface of the outer grinding wheel 74 is equidistantly provided with silicone hemispherical convex 76, and the convex point of the silicone hemispherical convex 76 is provided with a sensing contact 77.

[0039] In some embodiments, a third transmission assembly 8 is disposed on the left side of the mounting frame 5 .

[0040] Preferably, the third transmission assembly 8 includes a fixed frame 81, a third rotating rod 82, an active bevel gear 83 and a first sprocket 84, the fixed frame 81 is welded to the left outer wall of the mounting frame 5, and one side of the fixed frame 81 is movably connected to the third rotating rod 82 through a bearing, and the end of the third rotating rod 82 is fixedly connected to the active bevel gear 83, and the outer wall of the third rotating rod 82 is fixedly connected to the first sprocket 84, the third transmission assembly 8 also includes a second sprocket 85 and a transmission chain 86, the second sprocket 85 is sleeved on the transmission rod 41, and the outer wall of the second sprocket 85 is meshedly connected to the transmission chain 86, and the second sprocket 85 is connected to the first sprocket 84 through the transmission chain 86;

[0041] The specific operation is as follows: while the driving motor 3 drives the first transmission component 4 to operate, it will also synchronously drive the second sprocket 85 to rotate, and after the meshing transmission of the second sprocket 85, the transmission chain 86 and the first sprocket 84, drive the active bevel gear 83 to rotate, and then drive the second rotating rod 63 to rotate through the meshing transmission of the active bevel gear 83 and the driven bevel gear 65, and then drive the first rotating rod 61 to rotate synchronously through the meshing transmission of the fourth gear 64 and the third gear 62. As the first rotating rod 61 and the second rotating rod 63 rotate, the pretreatment structure 7 will rotate accordingly, and the steel wire that needs to be fed into the weaving machine device 1 for weaving will pass between the upper and lower pretreatment structures 7, and the upper and lower sides of the steel wire are both located in the grinding groove 75. The outer grinding wheel 74 is rotated to grind the surface of the steel wire to remove burrs on the surface of the steel wire, which helps to improve the quality of the woven wire mesh.

[0042] It should be noted that, since a telescopic rod 72 and a spring 73 are provided between the outer grinding wheel 74 and the inner ring sleeve 71, elastic grinding can be achieved through telescoping during the grinding process, which effectively avoids damage to the steel wire caused by excessive rigid grinding, especially when there are abnormal protrusions and bumps on the surface of the steel wire, the inner ring sleeve 71 will abut against the sensing contact 77 on the silicone hemispherical protrusion 76. After the sensing contact 77 receives the touch perception, it will stop the weaving machine device 1 and the drive motor 3 to suspend the weaving work until the operator handles it, and then the weaving work can be continued. This design effectively prevents steel wire with defects such as protrusions and bumps on the surface from entering the weaving machine, and can realize surface inspection of the steel wire while pre-treating the steel wire during grinding, thereby preventing low-quality steel wire from entering the weaving machine, which helps to improve the quality of the mesh woven by the weaving machine.

[0043] In summary, the working principle of the motor-driven linkage device for a web weaving machine is as follows:

[0044] First, the steel wire to be fed into the weaving machine device 1 for weaving passes between the upper and lower pretreatment structures 7, and the upper and lower sides of the steel wire are both located in the grinding groove 75, and then the weaving machine device 1 and the driving motor 3 are started at the same time, and the driving motor 3 drives the transmission rod 41 to rotate, thereby driving the second sprocket 85 to rotate, and after the meshing transmission of the second sprocket 85, the transmission chain 86 and the first sprocket 84, the driving bevel gear 83 is driven to rotate, and then the active bevel gear 83 and the driven bevel gear 65 are meshed and driven, and the second rotating rod 63 is driven to rotate, and then the fourth gear 64 and the third gear 62 are meshed and driven, and the first rotating rod 61 is synchronously driven to rotate;

[0045] As the first rotating rod 61 and the second rotating rod 63 rotate, the pretreatment structure 7 will rotate accordingly, and the surface of the steel wire will be polished by the rotation of the outer grinding wheel 74 to remove the burrs on the surface of the steel wire. During the polishing process, the telescopic rod 72 and the spring 73 between the inner ring sleeve 71 and the outer grinding wheel 74 will realize elastic polishing by telescoping, and when there are abnormal protrusions and bumps on the surface of the steel wire, the inner ring sleeve 71 will abut against the sensing contact 77 on the silicone hemispherical protrusion 76. After the sensing contact 77 receives the touch perception, it will stop the weaving machine device 1 and the driving motor 3 to suspend the weaving work until the operator handles it, and then the weaving work can be continued;

[0046] The pretreated steel wire is fed into the mesh weaving machine device 1, and the steel wire is woven into a mesh cloth by the mesh weaving machine device 1, and the woven mesh cloth is then passed between the lower smoothing roller 22 and the upper smoothing roller 23. The driving motor 3 drives the transmission rod 41 to rotate, thereby driving the lower smoothing roller 22 and the first gear 42 to rotate, and the upper smoothing roller 23 is driven to rotate through the meshing transmission of the first gear 42 and the second gear 43. The rotating lower smoothing roller 22 and the upper smoothing roller 23 can not only guide the discharge of the mesh cloth, but also smooth the mesh cloth. Since the diameter of the upper smoothing roller 23 is significantly smaller than that of the lower smoothing roller 22, the upper smoothing roller 23 and the lower smoothing roller 22 perform different smoothing operations on the upper and lower sides of the mesh cloth at the same rotation speed.

[0047] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A motor-driven linkage device for a web weaving machine, comprising a web weaving machine device (1) and a mounting frame (5), characterized in that: A post-processing mechanism (2) is arranged directly in front of the web weaving machine device (1), and the post-processing mechanism (2) comprises a carrier frame (21), a lower smoothing roller (22) and an upper smoothing roller (23), and both ends of the lower smoothing roller (22) and both ends of the upper smoothing roller (23) are movably connected to the carrier frame (21) through bearings, and a driving motor (3) is arranged on the right side of the post-processing mechanism (2), and the output shaft of the driving motor (3) is fixedly connected to the first transmission assembly (4) through a coupling; The first transmission assembly (4) comprises a transmission rod (41), a first gear (42) and a second gear (43), and one end of the transmission rod (41) is connected to the output shaft of the driving motor (3) through a coupling, and the other end of the transmission rod (41) passes through the carrier frame (21) and is fixedly connected to the right end of the lower smoothing roller (22), the first gear (42) and the second gear (43) are meshed, and the first gear (42) is sleeved on the right end of the lower smoothing roller (22), and the second gear (43) is sleeved on the right end of the upper smoothing roller (23), the mounting frame (5) is fixed on the top of the weaving machine device (1), and the second transmission assembly (6) is arranged on the inner side of the mounting frame (5), and the outer wall of the second transmission assembly (6) is connected to the pretreatment structure (7), and the third transmission assembly (8) is arranged on the left side of the mounting frame (5); The second transmission assembly (6) comprises a first rotating rod (61), a third gear (62), a second rotating rod (63), a fourth gear (64) and a driven bevel gear (65); both ends of the first rotating rod (61) are movably connected to the inner wall of the mounting frame (5) through bearings, and the outer wall of the first rotating rod (61) is fixedly connected to the third gear (62); one end of the second rotating rod (63) is movably connected to the inner wall of the mounting frame (5) through a bearing, and the outer wall of the second rotating rod (63) is fixedly connected to the fourth gear (64), and the other end of the second rotating rod (63) is welded to the driven bevel gear (65); the second rotating rod (63) is arranged directly above the first rotating rod (61), and the outer walls of the second rotating rod (63) and the outer walls of the first rotating rod (61) are both sleeved with two of the pretreatment structures (7), and the second rotating rod (63) is arranged in parallel with the first rotating rod (61); The third transmission assembly (8) comprises a fixed frame (81), a third rotating rod (82), an active bevel gear (83), a first sprocket (84), a second sprocket (85) and a transmission chain (86); the fixed frame (81) is welded to the left outer wall of the mounting frame (5); one side of the fixed frame (81) is movably connected to the third rotating rod (82) via a bearing; the end of the third rotating rod (82) is fixedly connected to the active bevel gear (83); the outer wall of the third rotating rod (82) is fixedly connected to the first sprocket (84); the second sprocket (85) is sleeved on the transmission rod (41); the outer wall of the second sprocket (85) is meshedly connected to the transmission chain (86); the second sprocket (85) is connected to the first sprocket (84) via the transmission chain (86); The pretreatment structure (7) comprises an inner ring sleeve (71), a telescopic rod (72) and a spring (73); the outer surface of the inner ring sleeve (71) is fixedly connected to the telescopic rod (72); the outer surface of the inner ring sleeve (71) is fixedly connected to the spring (73); and the spring (73) is wound around the outer side of the telescopic rod (72); the number of the telescopic rods (72) and the number of the springs (73) are both six, and each of the telescopic rods (72) and each of the springs (73) constitutes a group, and the six groups of telescopic rods (72) and springs (73) are arranged in a ring array on the outer surface of the inner ring sleeve (71); The outer grinding wheel (74) is connected to the outer side of the inner ring sleeve (71) through a telescopic rod (72) and a spring (73), and a grinding groove (75) is provided on the outer surface of the outer grinding wheel (74). Silicone hemispherical protrusions (76) are equidistantly arranged on the inner surface of the outer grinding wheel (74), and a sensing contact (77) is arranged at the protrusion of the silicone hemispherical protrusion (76).

2. The motor-driven linkage device for a web weaving machine according to claim 1, characterized in that: The number of the supporting frames (21) is two, and the lower smoothing roller (22) and the upper smoothing roller (23) are arranged in parallel between the two supporting frames (21).

3. The motor-driven linkage device for a web weaving machine according to claim 1, characterized in that: The lower smoothing roller (22) and the upper smoothing roller (23) rotate synchronously via a first gear (42) and a second gear (43), and the shape and size of the first gear (42) are completely consistent with those of the second gear (43).

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