A surface treatment device for multi-layer paper tube production

Abstract

The application discloses a surface treatment equipment for multilayer paper tube production and processing and relates to the technical field of grinding equipment, which comprises a machine tool support, a grinding wheel main shaft and a gas guide pipe. The surface treatment equipment adopts the mode of combining compressed air with the grinding wheel to perform grinding treatment on the cylindrical surface of the paper tube. A plurality of inclined grooves are formed on the outer surface of the grinding wheel. Compressed air is guided to the grinding area through the inclined grooves to induce the grinding wheel to vibrate, so that the one-way grinding is changed into complex cross grinding, and the tearing and fluffing of the fibers on the surface of the paper tube are effectively inhibited. In addition, the flared portions are arranged at the two ends of the inclined grooves. The arrangement of the flared portions not only improves the introduction effect of the compressed air, but also forms a continuous air path among the plurality of grinding wheels, and the grinding effect of the surface of the paper tube is further improved.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and in particular to a surface treatment device for the production and processing of multilayer paper tubes. Background Technology

[0002] Paper tubes, as a common basic industrial product, are widely used in papermaking, textiles, packaging and building materials. The processing quality of their outer cylindrical surface directly affects the yield rate of subsequent processes and the appearance quality of the finished product.

[0003] In the paper tube production process, the outer cylindrical surface needs to be ground after forming to facilitate subsequent polishing. However, paper tubes are made of multiple layers of paper wound together with adhesives. The material itself has the characteristics of fiber orientation and low rigidity. When traditional grinding wheel equipment processes the outer cylindrical surface of paper tubes, the abrasive grains of ordinary grinding wheels have a single movement trajectory and relatively sharp cutting edges. When they come into contact with the paper tube surface, they easily generate a pulling force along the direction of the paper fibers, causing the surface fibers to be torn and lifted, forming a "fuzzing" phenomenon. In severe cases, it can even damage the structural strength of the paper tube. The dust generated by grinding paper tubes is large in quantity and lightweight, which easily clogs the air pores of the grinding wheel and adheres to the processed surface. If it is not removed in time, it will cause secondary scratches.

[0004] While the industry has offered solutions to address the aforementioned issues by adjusting the grinding wheel grit or adding a polishing process, these approaches fail to resolve the core problem of fiber tearing at the grinding mechanism level. Therefore, it is essential to invent a surface treatment device for the production and processing of multi-layer paper tubes to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to provide a surface treatment device for the production and processing of multilayer paper tubes, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a surface treatment device for the production and processing of multilayer paper tubes, comprising: A machine tool support is provided, on which an air shaft and a grinding wheel housing are mounted. A paper tube product is sleeved on the outside of the air shaft. A rotary motor is mounted on one end of the air shaft and is fixedly mounted on the top of the machine tool support. A grinding wheel spindle is rotatably mounted inside the grinding wheel housing via bearings. Multiple grinding wheels are fixedly mounted on the outer side of the grinding wheel spindle, and multiple inclined grooves are provided around the outer side walls of the multiple grinding wheels. Two air guide pipes are provided, located at the two ends inside the grinding wheel housing. Both air guide pipes are C-shaped, and multiple axial air nozzles are installed around the side of the two air guide pipes that are close to each other. The central axis of the multiple axial air nozzles coincides with the opening of the inclined groove. The compressed air ejected from the axial air nozzles is guided through the inclined groove to the contact surface between the grinding wheel and the paper tube product. The contact surface between the grinding wheel and the paper tube product is excited by the compressed air. A connecting pipe is fixedly installed on the side of the two air guide pipes that are close to each other. Multiple inclined air nozzles are fixedly installed in the middle of the connecting pipe, and the multiple inclined air nozzles are located at the tangent of the outer wall of the grinding wheel. The compressed air ejected from the inclined air nozzles directly acts on the contact surface between the grinding wheel and the paper tube product to clean the waste chips generated during grinding.

[0007] Preferably, it also includes an air chamber located at one end of the grinding wheel spindle. The inner wall of the air chamber is provided with multiple sets of air guide holes, and all sets of air guide holes extend to the outer surface of the grinding wheel spindle. An air inlet pipe is installed at one end of the air chamber. The partition has multiple partitions, all of which are fixedly installed on the outside of the grinding wheel spindle. The multiple partitions are staggered with the multiple grinding wheels. The interior of each of the multiple partitions is surrounded by multiple air outlets, and the multiple air outlets coincide with multiple air guide holes. The air outlets, air guide holes and air chambers form a compressed air guiding structure to guide compressed air from the inside of the grinding wheel to the outside.

[0008] Preferably, the plurality of axial nozzles are arranged in two groups, and the two groups of axial nozzles have different lengths and are staggered.

[0009] Preferably, it also includes a grinding wheel slide, which is fixedly installed on the outer bottom of the grinding wheel housing. A longitudinal lead screw is rotatably installed at the bottom of the grinding wheel slide via a bearing, and a longitudinal threaded sleeve is installed in the middle of the longitudinal lead screw. A transverse slide is fixedly installed at the bottom of the longitudinal threaded sleeve and can be horizontally slidably installed above the machine tool support. A transverse threaded sleeve is fixedly installed in the middle of the transverse slide, and a transverse lead screw is installed through the middle of the transverse threaded sleeve. The transverse lead screw is rotatably installed above the machine tool support through a bearing.

[0010] Preferably, it also includes a grinding motor, which is fixedly installed on the top outer side of the grinding wheel housing, and the output shaft of the grinding motor is connected to one end of the grinding wheel spindle.

[0011] Preferably, it also includes a chip discharge hopper, which is fixedly installed at the bottom of the grinding wheel housing, and the top of the chip discharge hopper is funnel-shaped and located below the inclined air nozzle.

[0012] Preferably, it also includes a compressed air pipe, which is fixedly installed on the outside of the air guide pipe, and the compressed air pipe is used to inject compressed air; The mounting base is fixedly installed on the outside of the air duct and connected to the outer wall of the grinding wheel housing by bolts.

[0013] Preferably, each of the two ends of the plurality of inclined grooves is provided with a flared opening, and the flared openings on the outer surfaces of two adjacent grinding wheels overlap each other.

[0014] Preferably, the partition includes two symmetrical semicircular plates connected by bolts, and the outer wall of the grinding wheel spindle is provided with multiple annular grooves that are adapted to the partition.

[0015] Preferably, there are two positioning seats, both of which are fixedly installed in the middle of the grinding wheel spindle. The two positioning seats are used to limit the position of multiple grinding wheels.

[0016] The technical effects and advantages of this invention are as follows: 1. This invention uses a combination of compressed air and grinding wheels to grind the cylindrical surface of the outer surface of a paper tube. By creating multiple inclined grooves on the outer surface of the grinding wheel, compressed air is guided through the grooves to the grinding area, inducing the grinding wheel to vibrate. This transforms unidirectional grinding into complex cross-grinding, effectively suppressing fiber tearing and fuzzing on the paper tube surface. Furthermore, by setting flared openings at both ends of the inclined grooves, the introduction of compressed air is not only improved, but also a continuous air path is formed between multiple grinding wheels, further enhancing the grinding effect on the paper tube surface. 2. This invention employs a dual air path system (internal and external) to clean the grinding debris. The external air path sprays airflow towards the tangent of the grinding wheel through an angled nozzle, while the internal air path sprays airflow directly from the inside out through the grinding wheel spindle. This combination of internal and external air paths enables bidirectional cleaning of debris, effectively reducing debris adhesion. Simultaneously, the airflow from both paths quickly carries away frictional heat upon contact with the paper tube surface, preventing the fibers on the paper tube surface from charring due to frictional heat accumulation. This improves the grinding effect while ensuring the final quality of the paper tube product. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 .

[0018] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 .

[0019] Figure 3 This is a side view of the overall structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the air shaft structure of the present invention.

[0021] Figure 5This is a schematic diagram of the grinding wheel housing structure of the present invention. Figure 1 .

[0022] Figure 6 This is a schematic diagram of the grinding wheel housing structure of the present invention. Figure 2 .

[0023] Figure 7 This is a schematic diagram of the grinding wheel housing structure of the present invention. Figure 3 .

[0024] Figure 8 This is a schematic diagram of the grinding wheel housing structure of the present invention. Figure 4 .

[0025] Figure 9 This is a schematic diagram of the grinding wheel spindle structure of the present invention. Figure 1 .

[0026] Figure 10 This is a schematic diagram of the grinding wheel structure of the present invention.

[0027] Figure 11 This is a schematic diagram of the grinding wheel spindle structure of the present invention. Figure 2 .

[0028] Figure 12 This is a cross-sectional schematic diagram of the grinding wheel spindle structure of the present invention.

[0029] In the diagram: 1. Machine tool support; 2. Air shaft; 21. Paper tube product; 22. Rotary motor; 3. Grinding wheel housing; 31. Grinding wheel spindle; 311. Air chamber; 312. Air guide hole; 313. Air inlet pipe; 314. Annular groove; 315. Positioning seat; 32. Grinding wheel; 321. Inclined groove; 322. Flaring; 3121. Partition plate; 3122. Air outlet; 33. Grinding wheel slide; 331. Longitudinal lead screw; 332. Longitudinal lead sleeve; 34. Transverse slide; 341. Transverse lead sleeve; 342. Transverse lead screw; 35. Grinding motor; 36. Chip hopper; 4. Air guide pipe; 41. Axial air nozzle; 42. Connecting pipe; 43. Inclined air nozzle; 44. Compressed air pipe; 45. Mounting seat. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figures 1 to 12As shown, the surface treatment equipment for multi-layer paper tube production and processing provided by the present invention is essentially a grinding machine tool that uses a combination of compressed air and a grinding wheel to grind the cylindrical surface of the outer surface of the paper tube.

[0032] In terms of specific structural installation, the structural body can be constructed according to the inventive concept of this embodiment. In this embodiment, no special limitations are imposed.

[0033] In this embodiment, a surface treatment device for the production and processing of multilayer paper tubes includes: The machine tool support 1 has an air shaft 2 and a grinding wheel housing 3 mounted on top of it. A paper tube product 21 is sleeved on the outside of the air shaft 2. A rotary motor 22 is mounted on one end of the air shaft 2 and is fixedly mounted on top of the machine tool support 1. Multiple key strips are evenly distributed along the axial direction on the surface of the air shaft 2. An air nozzle is mounted on the end of the air shaft 2 by an annular air guide ring for connecting the air circuit. The rotary motor 22 is directly fixed to the main body of the machine tool support 1 through the bracket. The output shaft of the rotary motor 22 is directly connected to the end of the air shaft 2 through a coupling. The grinding wheel spindle 31 is rotatably mounted inside the grinding wheel housing 3 via bearings. Multiple grinding wheels 32 are fixedly mounted on the outer side of the grinding wheel spindle 31. The parallel design of multiple grinding wheels 32 increases the grinding contact area, enabling continuous and stable grinding of the outer circle of the paper tube in one go, ensuring surface flatness. Multiple inclined grooves 321 are provided around the outer side walls of the multiple grinding wheels 32. Both ends of the grooves 321 are provided with flared openings 322. The flared openings 322 on the outer surfaces of two adjacent grinding wheels 32 overlap each other. The flared openings 322 expand outward in a trumpet shape, increasing the airflow capture area, allowing the compressed air ejected from the axial air nozzle 41 to enter the inclined grooves 321 more smoothly. The overlapping design of the flared openings 322 of adjacent grinding wheels ensures continuous flow of compressed air between multiple grinding wheels, making the excitation effect evenly distributed along the axial direction of the grinding wheel group. An air chamber 311 is located at one end of the grinding wheel spindle 31. The inner wall of the air chamber 311 is provided with multiple sets of air guide holes 312, and the multiple sets of air guide holes 312 extend to the outer surface of the grinding wheel spindle 31. An air inlet pipe 313 is installed at one end of the air chamber 311. Multiple baffles 3121 are provided and fixedly installed on the outside of the grinding wheel spindle 31. The multiple baffles 3121 are staggered with multiple grinding wheels 32. The interior of each baffle 3121 is provided with multiple air outlets 3122, and the multiple air outlets 3122 coincide with multiple air guide holes 312. The air outlets 3122, air guide holes 312 and air chamber 311 form a compressed air guiding structure to guide compressed air from the inside of the grinding wheel 32 to the outside. The baffle 3121 includes two symmetrical semicircular plates connected by bolts. The outer wall of the grinding wheel spindle 31 is provided with multiple annular grooves 314 that are adapted to the baffles 3121. The two semicircular plates can be directly assembled on the outside of the grinding wheel spindle 31 to reduce the maintenance difficulty and cost of the device.

[0034] The grinding wheel slide 33 is fixedly installed on the bottom outer side of the grinding wheel housing 3. A longitudinal lead screw 331 is rotatably installed on the bottom of the grinding wheel slide 33 via a bearing. A longitudinal lead sleeve 332 is installed in the middle of the longitudinal lead screw 331. The transverse slide 34 is fixedly installed at the bottom of the longitudinal threaded sleeve 332 and can be horizontally slidably installed above the machine tool support 1. The transverse threaded sleeve 341 is fixedly installed in the middle of the transverse slide 34, and the transverse threaded rod 342 is installed through the middle of the transverse threaded sleeve 341. The transverse threaded rod 342 is rotatably installed above the machine tool support 1 through bearings. Both the longitudinal threaded rod 331 and the transverse threaded rod 342 are driven by servo motors. A linear guide rail is provided between the transverse slide 34 and the machine tool support 1. A linear guide rail is also provided between the grinding wheel slide 33 and the transverse slide 34 to ensure the sliding stability of the grinding wheel slide 33 and the transverse slide 34.

[0035] The grinding motor 35 is fixedly installed on the top outer side of the grinding wheel housing 3, and the output shaft of the grinding motor 35 is connected to one end of the grinding wheel spindle 31. The chip hopper 36 is fixedly installed at the bottom of the grinding wheel housing 3. The top of the chip hopper 36 is funnel-shaped and located below the inclined air nozzle 43. The bottom of the chip hopper 36 is connected to the corresponding chip discharge groove inside the machine tool support 1 for direct discharge of grinding chips.

[0036] Positioning seats 315 are provided, and two of them are fixedly installed in the middle of the grinding wheel spindle 31. The two positioning seats 315 are used to limit the position of multiple grinding wheels 32. The positioning seats 315 are fixed to the outside of the grinding wheel spindle 31 by fastening bolts.

[0037] Two air guide pipes 4 are provided and located at the two ends inside the grinding wheel housing 3, respectively. Both air guide pipes 4 are C-shaped, and multiple axial air nozzles 41 are installed around the side of the two air guide pipes 4 that are close to each other. The C-shaped structure facilitates the individual installation of the air guide pipes 4. The central axis of the multiple axial air nozzles 41 coincides with the groove opening of the inclined groove 321. The compressed air ejected from the axial air nozzles 41 is guided through the inclined groove 321 to the contact surface between the grinding wheel 32 and the paper tube product 21. The contact surface between the grinding wheel 32 and the paper tube product 21 is excited by the compressed air. A connecting pipe 42 is fixedly installed on the side of the two air guide pipes 4 that are close to each other. Multiple inclined air nozzles 43 are fixedly installed in the middle of the connecting pipe 42, and the multiple inclined air nozzles 43 are located at the tangent of the outer wall of the grinding wheel 32. The compressed air ejected from the inclined air nozzles 43 directly acts on the contact surface between the grinding wheel 32 and the paper tube product 21 to clean the waste chips generated during grinding.

[0038] Compressed air pipe 44 is fixedly installed on the outside of air pipe 4 and is used to inject compressed air. Mounting base 45 is fixedly installed on the outside of air pipe 4 and connected to the outer wall of grinding wheel housing 3 by bolts.

[0039] When using the surface treatment equipment for multi-layer paper tube production and processing according to this embodiment, when the equipment is in a stopped state, the operator attaches the paper tube product 21 to be processed to the outside of the air expansion shaft 2 by fitting one end of the air expansion shaft 2. After the paper tube product 21 is in place, the air expansion shaft 2 is inflated to complete the clamping and fixing of the paper tube product 21. Then the rotary motor 22 is started, and the rotary motor 22 drives the air expansion shaft 2 and the paper tube product 21 to rotate. At this time, the paper tube product 21 completes the preparation before grinding. The grinding motor 35 is started, and the grinding motor 35 drives the grinding wheel spindle 31 to rotate through the output shaft. The grinding wheel spindle 31 drives multiple grinding wheels 32 to rotate at high speed inside the grinding wheel housing 3. At this time, the longitudinal movement of the entire grinding wheel group is controlled by the longitudinal lead screw 331 and the longitudinal lead sleeve 332 so that the grinding wheel 32 approaches the paper tube product 21 until the grinding wheel 32 contacts the outer surface of the paper tube product 21. Then, the transverse lead screw 342 and the transverse lead sleeve 341 control the transverse movement of the entire grinding wheel group so that the grinding wheel 32 moves transversely along the outer surface of the paper tube product 21 until the grinding wheel 32 completes the grinding process on the outer surface of the paper tube product 21. During the grinding process, the outer surface of the grinding wheel 32 remains in contact with the outer surface of the paper tube product 21. Because the outer surface of the grinding wheel 32 has multiple inclined grooves 321, the contact point between the outer surface of the grinding wheel 32 and the outer surface of the paper tube product 21 is in a state of lateral dynamic change. This lateral dynamic change causes uneven bumps and defects on the outer surface of the paper tube product 21 to break under dynamic and alternating forces. During this process, a compressed air power source (air compressor, compressed air tank, etc.) connected to the device is activated. A batch of compressed air enters the air guide pipe 4 through the compressed air pipe 44, and then is precisely injected into the grinding wheel through the axial air nozzle 41. Compressed air ejected from the outer wall of the wheel 32 via the axial air nozzle 41 passes through the flare 322 and enters the inclined groove 321. Then, guided by the inclined groove 321, it reaches the grinding contact point. The high-speed compressed air is ejected from the contact point between the groove of the inclined groove 321 and the paper tube product 21. The high-speed flow of the compressed air induces high-frequency micro-amplitude excitation at the inclined groove position of the inclined groove 321, which causes the grinding direction to change from unidirectional to complex cross direction. The surface fibers of the paper tube product 21 are cut off under the influence of the high-frequency excitation grinding wheel 32. While achieving the surface grinding treatment of the paper tube product 21, the tearing and fuzzing of the surface fibers of the paper tube product 21 are suppressed. During the grinding process, the compressed air in the air guide pipe 4 is ejected at the tangential angle of the grinding wheel 32 through the connecting pipe 42 and the inclined air nozzle 43. This part of the compressed air is directly injected into the grinding contact area to form a high-speed air curtain, which blows the chips generated by grinding away from the grinding area to prevent the chips from causing secondary scratches. The blown-off waste chips fall into the funnel-shaped chip discharge hopper 36 below under the push of the airflow, achieving efficient collection. While the external air circuit is working, another set of compressed air enters the air chamber 311 inside the grinding wheel spindle 31 through the air inlet pipe 313, and then is ejected through the air guide hole 312 and the air outlet hole 3122 via the outer surface of the partition plate 3121. This part of the compressed air directly enters between multiple grinding wheels 32, and then is ejected outward through the gap between multiple grinding wheels 32. During this process, the ejected compressed air assists in cleaning the debris generated by grinding, and together with the compressed air ejected from the angled air nozzle 43, it acts on the surface of the paper tube product 21 to carry away the frictional heat generated during grinding, thereby preventing the surface of the paper tube product 21 from overheating and charring, which would affect the product quality. After grinding is completed, control all structures to stop and reset, and then remove the paper tube product 21 from the outside of the air shaft 2 to complete the entire grinding operation.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A surface treatment device for the production and processing of multi-layer paper tubes, characterized in that, include: A machine tool support (1) is provided with an air shaft (2) and a grinding wheel housing (3) mounted on top of it. A paper tube product (21) is sleeved on the outside of the air shaft (2). A rotary motor (22) is mounted on one end of the air shaft (2), and the rotary motor (22) is fixedly mounted on top of the machine tool support (1). The grinding wheel spindle (31) is rotatably mounted inside the grinding wheel housing (3) via bearings. Multiple grinding wheels (32) are fixedly mounted on the outer side of the grinding wheel spindle (31), and multiple inclined grooves (321) are provided around the outer side walls of the multiple grinding wheels (32). Two air guide pipes (4) are provided and located at the two ends inside the grinding wheel housing (3). Both air guide pipes (4) are "C" shaped, and multiple axial air nozzles (41) are installed around the side of the two air guide pipes (4) that are close to each other. The central axis of the multiple axial air nozzles (41) coincides with the groove opening of the inclined groove (321). The compressed air ejected from the axial air nozzles (41) is guided through the inclined groove (321) to the contact surface between the grinding wheel (32) and the paper tube product (21). 32) The contact surface with the paper tube product (21) is excited by compressed air. A connecting pipe (42) is fixedly installed on one side of the two air guide pipes (4) that are close to each other. A plurality of oblique air nozzles (43) are fixedly installed in the middle of the connecting pipe (42), and the plurality of oblique air nozzles (43) are all located at the tangent of the outer wall of the grinding wheel (32). The compressed air sprayed by the oblique air nozzles (43) directly acts on the contact surface between the grinding wheel (32) and the paper tube product (21) to clean the waste chips generated by grinding.

2. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: An air chamber (311) is located at one end of the grinding wheel spindle (31). The inner wall of the air chamber (311) is provided with multiple sets of air guide holes (312), and the multiple sets of air guide holes (312) extend to the outer surface of the grinding wheel spindle (31). An air inlet pipe (313) is installed at one end of the air chamber (311). A partition (3121) is provided, and is fixedly installed on the outside of the grinding wheel spindle (31). The partitions (3121) are staggered with the grinding wheels (32). The interior of the partitions (3121) is surrounded by a plurality of air outlets (3122), and the air outlets (3122) coincide with the air guide holes (312). The air outlets (3122), the air guide holes (312), and the air chamber (311) form a compressed air guiding structure to guide the compressed air to be ejected from the inside of the grinding wheel (32) to the outside.

3. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that: The multiple axial nozzles (41) are arranged in two groups, and the two groups of axial nozzles (41) have different lengths and are staggered.

4. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: A grinding wheel slide (33) is fixedly installed on the outer bottom of the grinding wheel housing (3). A longitudinal lead screw (331) is rotatably installed on the bottom of the grinding wheel slide (33) via a bearing. A longitudinal lead sleeve (332) is installed in the middle of the longitudinal lead screw (331). A transverse slide (34) is fixedly installed at the bottom of the longitudinal threaded sleeve (332) and can be horizontally slidably installed above the machine tool support (1). A transverse threaded sleeve (341) is fixedly installed in the middle of the transverse slide (34). A transverse threaded rod (342) is installed through the middle of the transverse threaded sleeve (341), and the transverse threaded rod (342) is rotatably installed above the machine tool support (1) through a bearing.

5. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: The grinding motor (35) is fixedly installed on the top outer side of the grinding wheel housing (3), and the output shaft of the grinding motor (35) is connected to one end of the grinding wheel spindle (31).

6. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: The chip discharge hopper (36) is fixedly installed at the bottom of the grinding wheel housing (3), and the top of the chip discharge hopper (36) is funnel-shaped and located below the inclined air nozzle (43).

7. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: A compressed air pipe (44) is fixedly installed on the outside of the air guide pipe (4), and the compressed air pipe (44) is used to inject compressed air; Mounting base (45) is fixedly installed on the outside of the air duct (4) and connected to the outer wall of the grinding wheel housing (3) by bolts.

8. The surface treatment equipment for multi-layer paper tube production and processing according to claim 1, characterized in that: Each of the inclined grooves (321) has an flared opening (322) at both ends, and the flared openings (322) on the outer surfaces of two adjacent grinding wheels (32) overlap each other.

9. A surface treatment device for multi-layer paper tube production and processing according to claim 2, characterized in that: The partition (3121) includes two semicircular plates that are symmetrically arranged on the top and bottom. The two semicircular plates are connected by bolts. The outer side wall of the grinding wheel spindle (31) is provided with a plurality of annular grooves (314) that are adapted to the partition (3121).

10. A surface treatment device for multi-layer paper tube production and processing according to claim 1, characterized in that, Also includes: Positioning seats (315), two of which are fixedly installed in the middle of the grinding wheel spindle (31), are used to limit the position of multiple grinding wheels (32).

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