Sanding machine

Abstract

The invention relates to the technical field of sanding machines, in particular to a sanding machine which comprises a machine body, a conveying assembly, a polishing assembly and a correcting assembly. The correction assembly comprises a sensing roller and a shaping roller; when the sensing roller senses the starting end of the wood, the shaping roller descends to a first height after a first set time, and gradually ascends to a second height from the first height within a first preset duration after a preset time; when the sensing roller senses the tail end moment of the wood, the shaping roller starts to gradually descend from the second height within a second preset duration before the second set time until the shaping roller descends to the first height within the first set time; according to the method, the initial end and the tail end of the wood are detected, the calculated delay time is matched, the wood with the larger density can be formed through extrusion and deformation in advance, the better supporting effect can be achieved, the wood can slowly rebound after being extruded, and rebound compensation can be conducted on the excessively-polished part.

Description

Technical Field

[0001] This invention relates to the field of sanding machine technology, and specifically to a sanding machine. Background Technology

[0002] Sanding machines are a common type of machinery used in the wood processing industry to sand the surface of wood boards to obtain the desired surface roughness or smoothness.

[0003] Sanding machines use a conveyor belt and sanding rollers to sand wood boards. The conveyor belt moves the wood boards into the processing box, where the sanding rollers process them. However, when polishing the wood at the beginning and end, the insufficient force area can cause the beginning and end of the wood to be over-thinned (relative to the overall thickness of the board). In industry terms, this is called "head chipping" (feed end) and "tail sweeping" (output end), collectively referred to as "overcutting" or "end sinking".

[0004] Therefore, a sander is needed that can avoid chipping at the top and bottom of the wood and thus achieve a smooth, polished finish. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a sander that can avoid chipping at the beginning and end of the wood and thus achieve a smooth polishing of the wood.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A sander includes a body, a transport assembly, a polishing assembly, and a finishing assembly; The machine body includes a horizontal platform, which includes a feeding end and a discharging end; The transport assembly includes a conveyor belt, a conveyor motor, a drive roller, and a driven roller. The conveyor belt includes an inner ring surface and an outer ring surface. The drive roller and the driven roller are respectively disposed at the discharge end and the feed end of the platform. The inner ring surface of the conveyor belt is attached to the upper surface of the platform and sleeved on the drive roller and the driven roller. The conveyor motor is connected to the rotating roller for transmission. The polishing component and the correction component are positioned above the platform, with the correction component positioned closer to the feed end. The correction component includes a controller, a sensing roller, and a shaping roller, with the shaping roller located between the sensing roller and the polishing component. A pressure sensor is installed on the sensing roller. The shaping roller includes a roller body and two sets of adjustment modules, which are respectively located on the machine body on both sides of the conveyor belt. Each adjustment module includes a vertical track and a vertical reciprocating component. Both ends of the roller body are respectively connected to the vertical track, and the vertical reciprocating component drives the roller body to run along the vertical track. The controller is electrically connected to the conveyor motor, the sensing roller, and the vertical reciprocating component. The controller acquires the distance between the sensing roller and the shaping roller, and the speed at which the conveyor motor drives the conveyor belt. The delay time is obtained by dividing the distance by the speed. ; The moment when the sensing roller detects the beginning of the wood is The controller synchronously controls two vertical reciprocating components to drive the shaping roller in... + Then descend to the first altitude, and from + Within the first predetermined time period, the shaping roller gradually moves from the first height to the second height; When the sensing roller detects the end of the wood is The controller synchronously controls the two vertical reciprocating components in... + The second predetermined time before the shaping roller begins to gradually descend from the second height until it reaches the second predetermined time. + It descended to its first altitude.

[0007] Preferably, the sander further includes a dust collection component, which includes a blower, a connecting pipe, and a first dust collection pipe, wherein the blower, the connecting pipe, and the first dust collection pipe are connected in sequence to form a suction system; The first suction pipe has a first suction end, which is disposed between the shaping roller and the polishing assembly and is inclined toward the polishing assembly.

[0008] Preferably, the polishing assembly includes a coarse polishing module and a fine polishing module, wherein the sensing roller, the shaping roller, the coarse polishing module and the fine polishing module are parallel to each other and arranged sequentially from the feeding end to the output end; The dust collection assembly also includes a second dust collection pipe, and the fan, connecting pipe and second dust collection pipe are connected in sequence to form a suction system; The first suction end is positioned between the shaping roller and the roughing die and is tilted toward the roughing die.

[0009] The second suction pipe has a second suction end, which is disposed between the coarse polishing module and the fine polishing module and is inclined toward the fine polishing module.

[0010] Preferably, the rotational tangent direction of the coarse polishing module and the fine polishing module is towards the feed end.

[0011] Preferably, two sets of parallel first limiting rollers are provided between the coarse polishing module and the fine polishing module; and a second limiting roller is provided between the fine polishing module and the discharge end.

[0012] Preferably, there are two first limiting rollers and two second limiting rollers. The sensing roller, shaping roller, rough polishing module, first limiting roller, fine polishing module and second limiting roller are parallel to each other and arranged sequentially from the feeding end to the discharging end.

[0013] Preferably, the sander further includes a housing, the housing having a working space, and the sensing roller, shaping roller, rough polishing module, first limiting roller, fine polishing module and second limiting roller are located within the working space; The housing is connected to the platform. One side of the housing has a feed port facing the feed end, and the other side of the housing opposite to the feed port has a discharge port.

[0014] Preferably, the distance between the inlet and outlet is less than the length of the conveyor belt.

[0015] Preferably, the vacuuming assembly further includes a third vacuuming tube; The third suction pipe has an auxiliary suction end, and the suction fan, connecting pipe and the third suction pipe are connected in sequence to form a suction; the auxiliary suction end is equipped with a dust sweeping roller and a dust sweeping motor, the dust sweeping roller is rotatably installed inside the suction end, and the dust sweeping motor drives the dust sweeping roller to run; The third suction pipe is located on the outside of the housing and above the feed inlet, with the auxiliary suction end facing the conveyor belt.

[0016] Preferably, the vacuuming assembly further includes a fourth vacuum tube; the fourth vacuum tube has the same structure as the third vacuum tube. The fourth suction pipe is located on the outside of the housing and above the discharge port, with the auxiliary suction end of the fourth suction pipe facing the conveyor belt.

[0017] The beneficial effects of this invention are as follows: By detecting the starting and ending ends of the wood and calculating the delay time, the starting end of the wood can be squeezed, and only a portion of the starting end is squeezed. The same applies to the ending end. By squeezing a portion, the elasticity of the wood itself is utilized. By squeezing and deforming in advance, the wood with a higher density can be squeezed and form a better support effect when the polishing component is sanding. This avoids over-sanding due to insufficient support capacity of the wood. Even if the sanding roller sands a little too much, the wood can slowly rebound after being squeezed, which can also compensate for the over-sanded part. This ensures that there is still enough sanding amount during fine polishing (secondary sanding), thereby ensuring the flatness of the final product. By moving the shaping roller upward and downward, the shaping roller applies progressive pressure to the starting and ending ends of the wood (gradually moving upward and downward) to ensure uniform deformation. The entire correction process dynamically responds to changes in the size of the wood, improving the shaping effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the first angle structure of a sander according to a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the second angle structure of a sander according to a specific embodiment of the present invention; Figure 3 This is a partial disassembly diagram of a sander according to a specific embodiment of the present invention; Figure 4 This is a partial disassembly diagram of a sander according to a specific embodiment of the present invention; Labeling Explanation: 1. Machine body; 11. Platform; 12. Feeding end; 13. Discharge end; 2. Transport component; 21. Conveyor belt; 22. Conveyor motor; 23. Driven roller; 24. Driven roller; 3. Polishing component; 31. Rough polishing module; 32. Fine polishing module; 4. Correction component; 41. Sensing roller; 42. Shaping roller; 421. Roller body; 422. Adjustment module; 423. Vertical track; 424. Vertical reciprocating component; 5. Dust collection component; 51. First dust collection pipe; 511. First suction end; 52. Second dust collection pipe; 521. Second suction end; 53. Third dust collection pipe; 531. Dust sweeping motor; 532. Dust sweeping roller; 54. Fourth dust collection pipe; 6. First limiting roller; 7. Second limiting roller; 8. Housing; 81. Working space; 82. Feed inlet; 83. Discharge outlet. Detailed Implementation

[0019] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] Please refer to Figures 1 to 4 A sanding machine includes a body 1, a transport component 2, a polishing component 3, and a finishing component 4; The machine body 1 includes a horizontal platform 11, and the platform 11 includes a feeding end 12 and a discharging end 13; The transport assembly 2 includes a conveyor belt 21, a conveyor motor 22, a drive roller 23, and a driven roller 24. The conveyor belt 21 includes an inner ring surface and an outer ring surface. The drive roller 23 and the driven roller 24 are respectively disposed on the discharge end 13 and the feed end 12 of the platform 11. The inner ring surface of the conveyor belt 21 is attached to the upper surface of the platform 11 and sleeved on the drive roller 23 and the driven roller 24. The conveyor motor 22 is connected to the rotating roller for transmission. The polishing component 3 and the correction component 4 are positioned above the platform 11, with the correction component 4 positioned closer to the feed end 12. The correction component 4 includes a controller, a sensing roller 41, and a shaping roller 42. The shaping roller 42 is located between the sensing roller 41 and the polishing component 3. A pressure sensor is provided on the sensing roller 41. The shaping roller 42 includes a roller body 421 and two sets of adjustment modules 422. The two sets of adjustment modules 422 are respectively located on the machine body 1 on both sides of the conveyor belt 21. The adjustment module 422 includes a vertical track 423 and a vertical reciprocating component 424. The two ends of the roller body 421 are respectively connected to the vertical track 423, and the vertical reciprocating component 424 drives the roller body 421 to run along the vertical track 423. The controller is electrically connected to the conveyor motor 22, the sensing roller 41 and the vertical reciprocating component 424 respectively. The controller obtains the distance between the sensing roller 41 and the shaping roller 42, and obtains the speed at which the conveyor motor 22 drives the conveyor belt 21. The distance is divided by the speed to obtain the delay time t0. When the sensing roller 41 senses the beginning of the wood at time t1, the controller synchronously controls the two vertical reciprocating parts 424 to drive the shaping roller 42 to descend to the first height after t1+t0, and then gradually ascends from the first height to the second height within the first predetermined time after t1+t0. When the sensing roller 41 senses the end of the wood at time t2, the controller synchronously controls the two vertical reciprocating parts 424 to start driving the shaping roller 42 to gradually descend from the second height at a second predetermined time before t2+t0 until it descends to the first height at t2+t0.

[0021] As described above, by detecting the beginning and end of the wood and calculating the delay time, the beginning of the wood can be squeezed, and only a portion of the beginning is squeezed. The same applies to the end. By squeezing a portion, the elasticity of the wood itself is utilized. By squeezing and deforming in advance, the wood with a higher density can be squeezed and form a better support effect when the polishing component 3 is sanding. This avoids over-sanding due to insufficient support capacity of the wood. Even if the sanding roller sands a little too much, the wood can slowly rebound after being squeezed, which can also compensate for the over-sanded part. This ensures that there is still enough sanding amount during fine polishing (secondary sanding), thereby ensuring the flatness of the final product. By moving the shaping roller 42 up and down, the shaping roller 42 applies progressive pressure to the beginning and end of the wood (gradually moving up and down) to ensure uniform deformation. The entire correction process dynamically responds to changes in the size of the wood, improving the shaping effect.

[0022] Furthermore, the sander also includes a dust collection component 5, which includes a fan, a connecting pipe, and a first dust collection pipe 51, which are connected in sequence to form a suction system. The first suction pipe 51 has a first suction end 511, which is disposed between the shaping roller 42 and the polishing assembly 3 and is inclined toward the polishing assembly 3.

[0023] As can be seen from the above description, the first suction pipe 51 can suck in the wood chips generated during the polishing of the polishing component 3, and prevent the wood chips from adhering to the sensing roller 41 and the shaping roller 42, which could cause misjudgment or unevenness on the wood surface.

[0024] Furthermore, the polishing assembly 3 includes a coarse polishing module 31 and a fine polishing module 32. The sensing roller 41, the shaping roller 42, the coarse polishing module 31 and the fine polishing module 32 are parallel to each other and are arranged sequentially from the feed end 12 to the discharge end 13. The dust collection component 5 also includes a second dust collection pipe 52, and the fan, the connecting pipe and the second dust collection pipe 52 are connected in sequence to form a suction system; The first suction end 511 is located between the shaping roller 42 and the rough polishing module 31 and is inclined toward the rough polishing module 31.

[0025] The second suction pipe 52 has a second suction end 521, which is disposed between the coarse polishing module 31 and the fine polishing module 32 and is inclined toward the fine polishing module 32.

[0026] As can be seen from the above description, by setting the first suction end 511 between the shaping roller 42 and the coarse polishing module 31 and tilting it toward the coarse polishing module 31, and setting the second suction end 521 between the coarse polishing module 31 and the fine polishing module 32 and tilting it toward the fine polishing module 32, it can be ensured that the generated polishing wood chips can be sucked in in time, thereby avoiding affecting the operation of other equipment, such as the sensing roller 41 and the shaping roller 42.

[0027] Furthermore, the rotational tangent direction of the coarse polishing module 31 and the fine polishing module 32 is toward the feed end 12.

[0028] As described above, the rotational tangent of the coarse polishing module 31 and the fine polishing module 32 is oriented towards the feed end 12, which can increase friction and prevent the board from flying out due to being in the same direction as the conveyor. It can also feed the planed wood chips into the first suction pipe 51 and the second suction pipe 52, improving the cleaning effect.

[0029] Furthermore, two sets of parallel first limiting rollers 6 are provided between the coarse polishing module 31 and the fine polishing module 32; and a second limiting roller 7 is provided between the fine polishing module 32 and the discharge end 13.

[0030] As can be seen from the above description, by setting the first limiting roller 6 and the second limiting roller 7, it is possible to prevent the wood from losing pressure in the front half after passing through the rough and fine polishing components, while the rear half still has pressure and warps up, thus getting stuck in the sander.

[0031] Furthermore, there are two first limiting rollers 6 and two second limiting rollers 7. The sensing roller 41, shaping roller 42, rough polishing module 31, first limiting roller 6, fine polishing module 32 and second limiting roller 7 are parallel to each other and arranged sequentially from the feeding end 12 to the discharging end 13.

[0032] Furthermore, the sander also includes a housing 8, which has a working space 81, and the sensing roller 41, the shaping roller 42, the rough polishing module 31, the first limiting roller 6, the fine polishing module 32 and the second limiting roller 7 are located in the working space 81. The housing 8 is connected to the platform 11. One side of the housing 8 has a feed port 82 facing the feed end 12, and the other side of the housing 8 opposite to the feed port 82 has a discharge port 83.

[0033] As can be seen from the above description, by providing only an inlet 82 and an outlet 83 in the housing 8, it is possible to work with the dust collection component 5 to draw in air from the inlet 82 and the outlet 83 to form a negative pressure, thereby reducing or avoiding the possibility of wood chips polluting the environment or even causing a dust explosion.

[0034] Furthermore, the distance between the inlet 82 and the outlet 83 is less than the length of the conveyor belt 21.

[0035] Furthermore, the vacuuming assembly 5 also includes a third vacuuming pipe 53; The third suction pipe 53 has an auxiliary suction end. The suction fan, the connecting pipe and the third suction pipe 53 are connected in sequence to form a suction. The auxiliary suction end is provided with a dust sweeping roller 532 and a dust sweeping motor 531. The dust sweeping roller 532 is rotatably disposed in the suction end, and the dust sweeping motor 531 drives the dust sweeping roller 532 to run. The third suction pipe 53 is located on the outside of the housing 8 and above the feed inlet 82, and the auxiliary suction end is set towards the conveyor belt 21.

[0036] Furthermore, the vacuuming assembly 5 also includes a fourth vacuuming pipe 54; the structure of the fourth vacuuming pipe 54 is the same as that of the third vacuuming pipe 53. The fourth suction pipe 54 is located on the outside of the housing 8 and above the discharge port 83, and the auxiliary suction end of the fourth suction pipe 54 is oriented towards the conveyor belt 21.

[0037] As can be seen from the above description, the fourth suction pipe 54 and the third suction pipe 53 can sweep away and collect dust or other wood chips on the surface of the board during feeding, ensuring the cleanliness of the feeding; while the fourth suction pipe 54 can clean up some remaining wood chips during discharging, ensuring the cleanliness of the discharging.

[0038] Example 1 A sander includes a body 1, a transport component 2, a polishing component 3, and a finishing component 4; The machine body 1 includes a horizontal platform 11, and the platform 11 includes a feeding end 12 and a discharging end 13; The transport assembly 2 includes a conveyor belt 21, a conveyor motor 22, a drive roller 23, and a driven roller 24. The conveyor belt 21 includes an inner ring surface and an outer ring surface. The drive roller 23 and the driven roller 24 are respectively disposed on the discharge end 13 and the feed end 12 of the platform 11. The inner ring surface of the conveyor belt 21 is attached to the upper surface of the platform 11 and sleeved on the drive roller 23 and the driven roller 24. The conveyor motor 22 is connected to the rotating roller for transmission. The polishing component 3 and the correction component 4 are positioned above the platform 11, with the correction component 4 positioned closer to the feed end 12. The correction component 4 includes a controller, a sensing roller 41, and a shaping roller 42. The shaping roller 42 is located between the sensing roller 41 and the polishing component 3. A pressure sensor is provided on the sensing roller 41. The shaping roller 42 includes a roller body 421 and two sets of adjustment modules 422. The two sets of adjustment modules 422 are respectively located on the machine body 1 on both sides of the conveyor belt 21. The adjustment module 422 includes a vertical track 423 and a vertical reciprocating component 424. The two ends of the roller body 421 are respectively connected to the vertical track 423, and the vertical reciprocating component 424 drives the roller body 421 to run along the vertical track 423. The controller is electrically connected to the conveyor motor 22, the sensing roller 41 and the vertical reciprocating component 424 respectively. The controller obtains the distance between the sensing roller 41 and the shaping roller 42, and obtains the speed at which the conveyor motor 22 drives the conveyor belt 21. The distance is divided by the speed to obtain the delay time t0. When the sensing roller 41 senses the beginning of the wood at time t1, the controller synchronously controls the two vertical reciprocating parts 424 to drive the shaping roller 42 to descend to the first height after t1+t0, and then gradually ascends from the first height to the second height within the first predetermined time after t1+t0. When the sensing roller 41 senses the end of the wood at time t2, the controller synchronously controls the two vertical reciprocating parts 424 to start driving the shaping roller 42 to gradually descend from the second height at a second predetermined time before t2+t0 until it descends to the first height at t2+t0.

[0039] When the sensing roller 41 senses the beginning of the wood, that is, the pressure sensor pressure suddenly rises from zero; when the sensing roller 41 senses the end of the wood, that is, the pressure sensor pressure suddenly drops to zero. The sander also includes a dust collection component 5, which includes a fan, a connecting pipe and a first dust collection pipe 51, and the fan, the connecting pipe and the first dust collection pipe 51 are connected in sequence to form a suction system. The first suction pipe 51 has a first suction end 511, which is disposed between the shaping roller 42 and the polishing assembly 3 and is inclined toward the polishing assembly 3.

[0040] The polishing assembly 3 includes a coarse polishing module 31 and a fine polishing module 32. The sensing roller 41, the shaping roller 42, the coarse polishing module 31 and the fine polishing module 32 are parallel to each other and are arranged sequentially from the feed end 12 to the discharge end 13. The dust collection component 5 also includes a second dust collection pipe 52, and the fan, the connecting pipe and the second dust collection pipe 52 are connected in sequence to form a suction system; The first suction end 511 is located between the shaping roller 42 and the rough polishing module 31 and is inclined toward the rough polishing module 31.

[0041] The second suction pipe 52 has a second suction end 521, which is disposed between the coarse polishing module 31 and the fine polishing module 32 and is inclined toward the fine polishing module 32.

[0042] The rotational tangent direction of the coarse polishing module 31 and the fine polishing module 32 is toward the feed end 12.

[0043] Two sets of parallel first limiting rollers 6 are also provided between the coarse polishing module 31 and the fine polishing module 32; a second limiting roller 7 is also provided between the fine polishing module 32 and the discharge end 13.

[0044] There are two first limiting rollers 6 and two second limiting rollers 7. The sensing roller 41, shaping roller 42, rough polishing module 31, first limiting roller 6, fine polishing module 32 and second limiting roller 7 are parallel to each other and are arranged sequentially from the feeding end 12 to the discharging end 13.

[0045] The sander also includes a housing 8, which has a working space 81. The sensing roller 41, the shaping roller 42, the rough polishing module 31, the first limiting roller 6, the fine polishing module 32, and the second limiting roller 7 are located in the working space 81. The housing 8 is connected to the platform 11. One side of the housing 8 has a feed port 82 facing the feed end 12, and the other side of the housing 8 opposite to the feed port 82 has a discharge port 83.

[0046] The distance between the inlet 82 and the outlet 83 is less than the length of the conveyor belt 21.

[0047] Example 2 A sanding machine, which is the same as in Embodiment 1 and will not be described again, also includes: The dust collection assembly 5 also includes a third dust collection tube 53; The third suction pipe 53 has an auxiliary suction end. The suction fan, the connecting pipe and the third suction pipe 53 are connected in sequence to form a suction. The auxiliary suction end is provided with a dust sweeping roller 532 and a dust sweeping motor 531. The dust sweeping roller 532 is rotatably disposed in the suction end, and the dust sweeping motor 531 drives the dust sweeping roller 532 to run. The third suction pipe 53 is located on the outside of the housing 8 and above the feed inlet 82, and the auxiliary suction end is set towards the conveyor belt 21.

[0048] The vacuuming assembly 5 also includes a fourth vacuuming tube 54; the structure of the fourth vacuuming tube 54 is the same as that of the third vacuuming tube 53. The fourth suction pipe 54 is located on the outside of the housing 8 and above the discharge port 83, and the auxiliary suction end of the fourth suction pipe 54 is oriented towards the conveyor belt 21.

[0049] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A sanding machine, characterized in that, This includes the body, transport components, polishing components, and correction components; The machine body includes a horizontal platform, which includes a feeding end and a discharging end; The transport assembly includes a conveyor belt, a conveyor motor, a drive roller, and a driven roller. The conveyor belt includes an inner ring surface and an outer ring surface. The drive roller and the driven roller are respectively disposed at the discharge end and the feed end of the platform. The inner ring surface of the conveyor belt is attached to the upper surface of the platform and sleeved on the drive roller and the driven roller. The conveyor motor is connected to the rotating roller for transmission. The polishing component and the correction component are positioned above the platform, with the correction component positioned closer to the feed end. The correction component includes a controller, a sensing roller, and a shaping roller, with the shaping roller located between the sensing roller and the polishing component. A pressure sensor is installed on the sensing roller. The shaping roller includes a roller body and two sets of adjustment modules, which are respectively located on the machine body on both sides of the conveyor belt. Each adjustment module includes a vertical track and a vertical reciprocating component. Both ends of the roller body are respectively connected to the vertical track, and the vertical reciprocating component drives the roller body to run along the vertical track. The controller is electrically connected to the conveyor motor, the sensing roller, and the vertical reciprocating component. The controller acquires the distance between the sensing roller and the shaping roller, and the speed at which the conveyor motor drives the conveyor belt. The delay time is obtained by dividing the distance by the speed. ; The moment when the sensing roller detects the beginning of the wood is The controller synchronously controls two vertical reciprocating components to drive the shaping roller in... + Then descend to the first altitude, and from + Within the first predetermined time period, the shaping roller gradually moves from the first height to the second height; When the sensing roller detects the end of the wood is The controller synchronously controls the two vertical reciprocating components in... + The second predetermined time before the shaping roller begins to gradually descend from the second height until it reaches the second predetermined time. + It descended to its first altitude.

2. The sander according to claim 1, characterized in that, The sander also includes a dust collection component, which includes a blower, a connecting pipe, and a first dust collection pipe, which are connected in sequence to form a suction system. The first suction pipe has a first suction end, which is disposed between the shaping roller and the polishing assembly and is inclined toward the polishing assembly.

3. The sander according to claim 2, characterized in that, The polishing assembly includes a coarse polishing module and a fine polishing module. The sensing roller, shaping roller, coarse polishing module and fine polishing module are parallel to each other and arranged sequentially from the feed end to the discharge end. The dust collection assembly also includes a second dust collection pipe, and the fan, connecting pipe and second dust collection pipe are connected in sequence to form a suction system; The first suction end is positioned between the shaping roller and the roughing die and is tilted toward the roughing die. The second suction pipe has a second suction end, which is disposed between the coarse polishing module and the fine polishing module and is inclined toward the fine polishing module.

4. The sander according to claim 3, characterized in that, The rotational tangent direction of the coarse polishing module and the fine polishing module is towards the feed end.

5. The sander according to claim 3, characterized in that, Two sets of parallel first limiting rollers are also provided between the coarse polishing module and the fine polishing module; a second limiting roller is also provided between the fine polishing module and the discharge end.

6. The sander according to claim 5, characterized in that, There are two first limiting rollers and two second limiting rollers. The sensing roller, shaping roller, rough polishing module, first limiting roller, fine polishing module and second limiting roller are parallel to each other and arranged sequentially from the feeding end to the discharging end.

7. The sander according to claim 6, characterized in that, The sander also includes a housing, which has a working space, and the sensing roller, shaping roller, rough polishing module, first limiting roller, fine polishing module and second limiting roller are located in the working space; The housing is connected to the platform. One side of the housing has a feed port facing the feed end, and the other side of the housing opposite to the feed port has a discharge port.

8. The sander according to claim 7, characterized in that, The distance between the inlet and outlet is less than the length of the conveyor belt.

9. The sander according to claim 8, characterized in that, The vacuuming assembly also includes a third vacuum tube; The third suction pipe has an auxiliary suction end, and the suction fan, connecting pipe and the third suction pipe are connected in sequence to form a suction; the auxiliary suction end is equipped with a dust sweeping roller and a dust sweeping motor, the dust sweeping roller is rotatably installed inside the suction end, and the dust sweeping motor drives the dust sweeping roller to run; The third suction pipe is located on the outside of the housing and above the feed inlet, with the auxiliary suction end facing the conveyor belt.

10. The sander according to claim 9, characterized in that, The vacuuming assembly also includes a fourth vacuum tube; the fourth vacuum tube has the same structure as the third vacuum tube. The fourth suction pipe is located on the outside of the housing and above the discharge port, with the auxiliary suction end of the fourth suction pipe facing the conveyor belt.

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