A paper tube edge polishing device

Abstract

The application belongs to the technical field of paper tube polishing, and discloses a paper tube edge polishing device, which comprises a conveying mechanism, a polishing mechanism, a positioning mechanism and a cleaning mechanism; the conveying mechanism is used for supporting the paper tube; the polishing mechanism comprises inner and outer polishing assemblies and a first rack, the inner and outer polishing assemblies are installed on the first rack, and the inner and outer polishing assemblies comprise a rotating shaft, an inner polishing piece and an outer polishing piece. The conical inner polishing block and the annular outer polishing block which are coaxially arranged form a V-shaped annular gap, after the paper tube port is inserted, the outer taper surface of the inner polishing block polishes the inner edge chamfer of the paper tube, and the inner peripheral surface of the outer polishing block polishes the outer edge chamfer of the paper tube. The polishing and forming of the inner and outer edges can be simultaneously completed through one feeding, without the need of processing in different procedures, and the polishing efficiency is significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of paper tube polishing technology, specifically a paper tube edge polishing device. Background Technology

[0002] As a basic carrier widely used in industries such as packaging, textiles, and film winding, paper tubes often have defects such as burrs, flash, and interlayer warping at their ends after being cut and formed. The edges of the ends need to be polished to ensure that the paper tube end face is flat and the inner and outer edges are smooth, so as to avoid scratching the materials during subsequent winding and use.

[0003] Existing paper tube edge grinding devices have the following main shortcomings: First, most devices can only grind the end face or outer edge of the paper tube, and cannot simultaneously complete the chamfering of the inner and outer edges, requiring two separate processes, resulting in low production efficiency. Second, some devices that use a flat grinding disc to grind the end face vertically have a large difference in linear velocity between the outer and inner diameters of the disc, leading to uneven grinding of the end face, with the outer side easily over-grinded and the inner side under-grinded. Third, paper tubes are made of thin paper with poor rigidity, and existing devices mostly use external rigid clamping combined with hard feed for grinding. Even slightly excessive clamping or feed force can easily cause crushing and deformation of the ends, making them particularly unsuitable for thin paper tubes. Fourth, the paper dust generated during the grinding process lacks effective collection, and the dust easily spreads, polluting the working environment and endangering the health of operators. Therefore, improvements are needed to address these problems. Summary of the Invention

[0004] To address the problems mentioned in the background art, the present invention provides a paper tube edge grinding device, which has the advantages of simultaneous grinding of inner and outer edges, adaptability to different wall thicknesses, internal wind blowing to prevent crushing, and immediate dust collection.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a paper tube edge grinding device, comprising a conveying mechanism, a grinding mechanism, a positioning mechanism, and a cleaning mechanism;

[0006] The conveying mechanism is used to support the paper tube;

[0007] The polishing mechanism includes inner and outer polishing components and a first frame. The inner and outer polishing components are mounted on the first frame. The inner and outer polishing components include a rotating shaft, an inner polishing component, and an outer polishing component. The inner polishing component includes an inner polishing block, which is conical and mounted on the rotating shaft. The outer polishing component includes an outer polishing block, which is annular and sleeved outside the rotating shaft. An annular gap is formed between the inner polishing block and the outer polishing block for inserting the paper tube port.

[0008] The positioning mechanism is located on the side of the conveying mechanism away from the grinding mechanism, and is used for axial positioning of the paper tube;

[0009] The cleaning mechanism is connected to the polishing mechanism and the positioning mechanism, and is used to collect the debris generated during polishing, and to tighten the paper tube by means of air force.

[0010] Preferably, the conveying mechanism is equipped with a positioning block and a pushing assembly. The positioning block is used to support the paper tube, and the pushing assembly includes a first electric push rod and a pushing block. The output end of the first electric push rod is elastically connected to the pushing block through a spring telescopic rod. The pushing block pushes the paper tube upward to the grinding station under the drive of the first electric push rod. The positioning block is used to limit the movement of the paper tube.

[0011] Preferably, the inner and outer polishing assembly further includes a synchronous pulley and a second electric push rod. The synchronous pulley is mounted on the rotating shaft and is connected to a first rotary drive component installed inside the first frame via a synchronous belt to drive the rotating shaft to rotate. The second electric push rod is installed inside the first frame and is connected to the inner and outer polishing assembly via a bearing, for driving the inner and outer polishing assembly to feed or retract along the axial direction of the paper tube.

[0012] Preferably, the inner polishing component further includes a flow guide shroud, which is disposed outside the inner polishing block. The opening of the flow guide shroud faces the paper tube insertion direction and is used to guide the debris and airflow generated during polishing towards the cleaning mechanism.

[0013] Preferably, the outer grinding component further includes a sliding component, a connecting plate, a threaded shaft, a bearing plate, and a drive motor; the outer grinding block is fixed on the sliding component, the sliding component is connected to the connecting plate via a bearing, the connecting plate is threadedly connected to the threaded shaft, the bearing plate is mounted on the first frame, the threaded shaft is rotatably mounted on the bearing plate and is connected to the drive motor for transmission, the drive motor drives the threaded shaft to rotate, so as to drive the sliding component and the outer grinding block to move axially via the connecting plate, thereby adjusting the width of the annular gap.

[0014] Preferably, the outer conical surface of the inner grinding block and the inner circumferential surface of the outer grinding block are both conical surfaces. During grinding, the cross-section of the grinding surface generated by the rotation of the annular gap between the two is V-shaped. The paper tube port is inserted from the large end of the annular gap. The inner grinding block grinds the inner edge of the paper tube port, and the outer grinding block grinds the outer edge of the paper tube port.

[0015] Preferably, the positioning mechanism includes a second frame and a sealing assembly. The sealing assembly slides on the second frame and includes a positioning disk and a sealing element. The positioning disk is used to abut against the end face of the paper tube away from the grinding mechanism to achieve axial positioning. A second rotary drive for axial movement of the positioning disk is installed inside the second frame. The sealing element is disposed on the side of the positioning disk facing the paper tube and is used to form a seal between the end face of the paper tube and the positioning disk.

[0016] Preferably, the positioning disk has a through hole in the center, and the cleaning mechanism includes an exhaust pipe. One end of the exhaust pipe is connected to the through hole of the positioning disk, and the other end is connected to a blower. During polishing, one end of the paper tube is sealed and abutted against the positioning disk through the sealing element, and the other end is inserted into the annular gap, so that a relatively closed air chamber is formed inside the paper tube. The blower sends airflow into the paper tube through the exhaust pipe, and the air pressure inside the paper tube increases, causing the paper tube wall to expand outward, thereby achieving circumferential tensioning and positioning of the paper tube.

[0017] Preferably, the cleaning mechanism further includes an air inlet pipe, a collection box, and a guide pipe; one end of the guide pipe extends to the opening of the guide shroud and the outer polishing block, and the other end is connected to the collection box; the airflow sent by the fan enters the paper tube through the exhaust pipe, causing the paper tube to expand, and then flows out from the polishing end of the paper tube, carrying polishing debris. The opening of the guide shroud and the outer polishing block guides the debris-laden airflow to the guide pipe, and the debris-laden airflow enters the collection box through the guide pipe for filtration and collection. The air inlet pipe is connected to the fan to return the gas.

[0018] Preferably, the positioning block is a V-shaped block or an arc-shaped block, used to radially limit and guide the paper tube during the process of the pushing block pushing the paper tube upward to the grinding station; when the fan sends airflow into the paper tube and causes the paper tube wall to expand outward, the outer diameter of the paper tube increases, and the spring telescopic rod generates elastic compression to compensate for the expansion deformation of the paper tube, so that the pushing block always keeps in contact with the paper tube and does not restrict the radial expansion of the paper tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] This invention uses a V-shaped annular gap formed by a coaxially arranged conical inner grinding block and an annular outer grinding block. After the paper tube is inserted, the outer conical surface of the inner grinding block grinds the inner edge chamfer of the paper tube, and the inner circumferential surface of the outer grinding block grinds the outer edge chamfer of the paper tube. The grinding and shaping of the inner and outer edges can be completed simultaneously in one feed, eliminating the need for separate processing steps and significantly improving grinding efficiency.

[0021] This invention utilizes the conical slope characteristics of the inner and outer grinding blocks. When paper tubes of different diameters are inserted, their contact positions on the conical surface are different. Small-diameter paper tubes contact the small diameter part of the conical surface, and large-diameter paper tubes contact the large diameter part of the conical surface, automatically adapting to paper tubes of different diameters within a certain range. At the same time, the drive motor drives the threaded shaft to rotate, causing the outer grinding block to move axially and change the V-shaped gap width, which can adapt to paper tubes of different wall thicknesses and has strong versatility.

[0022] This invention uses a fan to send airflow into the paper tube through an exhaust pipe, which increases the air pressure inside the paper tube and causes the paper tube wall to expand outwards evenly, thus achieving circumferential tensioning and positioning of the paper tube. The external pushing block is only used to lift the paper tube, avoiding the problem of the thin paper tube end being crushed and deformed by external clamping force. At the same time, the spring telescopic rod is elastically compressed when the paper tube is tensioned to compensate for the expansion of the outer diameter, so that the pushing block always supports the paper tube but does not restrict its radial expansion.

[0023] This invention achieves two functions simultaneously: air tensioning and dust collection, through a single fan and an air path. The airflow from the fan enters the paper tube through the exhaust pipe, causing the paper tube to tighten. It then flows out from the grinding end, carrying debris, and is guided by the guide hood to the guide pipe, where it converges into the collection box. The inlet pipe returns the filtered gas to the fan, forming a closed-loop air path. Dust is carried away by the airflow the moment it is generated, preventing it from spreading outward and improving the working environment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a front view of the present invention;

[0026] Figure 3 This is a schematic diagram showing the structural position of the internal and external grinding components of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of the first frame of the present invention;

[0028] Figure 5 This is a detailed structural diagram of the internal and external grinding components of the present invention;

[0029] Figure 6 This is a side view of the outer grinding block, inner grinding block, and flow guide of the present invention;

[0030] Figure 7 This is a detailed structural diagram of the component driving the present invention;

[0031] Figure 8 This is a detailed structural diagram of the sealing assembly of the present invention.

[0032] In the diagram: 100, paper tube; 200, conveying mechanism; 201, positioning block; 202, pushing assembly; 2021, first electric push rod; 2022, pushing block; 300, grinding mechanism; 310, inner and outer grinding assembly; 311, rotating shaft; 312, inner grinding component; 3121, inner grinding block; 3122, flow guide; 313, outer grinding component; 3131, outer grinding block; 3132, sliding component; 3133, connection. Plate; 3134, Threaded shaft; 3135, Bearing plate; 3136, Drive motor; 320, Synchronous pulley; 330, Second electric push rod; 340, First frame; 400, Positioning mechanism; 410, Second frame; 420, Sealing assembly; 421, Positioning disc; 422, Seal; 500, Cleaning mechanism; 510, Fan; 520, Exhaust duct; 530, Inlet duct; 540, Collection box; 550, Guide pipe. Detailed Implementation

[0033] 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.

[0034] like Figures 1 to 8 As shown, this invention provides a paper tube edge polishing device, including a conveying mechanism 200, a polishing mechanism 300, a positioning mechanism 400, and a cleaning mechanism 500. The conveying mechanism 200 supports the paper tube 100 and pushes it to the polishing station; the polishing mechanism 300 is located on one side of the conveying mechanism 200 and is used to simultaneously polish the inner and outer edges of the paper tube 100's port; the positioning mechanism 400 is located on the other side of the conveying mechanism 200 away from the polishing mechanism 300 and is used to axially position and seal the paper tube 100; the cleaning mechanism 500 is connected to the polishing mechanism 300 and the positioning mechanism 400 and is used to collect the debris generated during polishing, while simultaneously using airflow to tighten and position the paper tube 100. These four mechanisms work together to form a complete paper tube edge polishing device.

[0035] like Figure 1 , Figure 2 and Figure 7As shown, the conveying mechanism 200 is equipped with positioning blocks 201 and pushing components 202. Positioning blocks 201 are V-shaped or arc-shaped blocks, with multiple blocks spaced apart along the axial direction of the paper tube 100. The paper tube 100 is placed horizontally on the positioning blocks 201, and the V-shaped or arc-shaped surface of the positioning blocks 201 is in contact with the outer circular surface of the paper tube 100, achieving radial support and limiting of the paper tube 100. The pushing component 202 includes a first electric push rod 2021 and a pushing block 2022. The first electric push rod 2021 is vertically installed below the conveying mechanism 200, with its output end facing upwards and connected to the pushing block 2022 via a spring telescopic rod. The pushing block 2022 is arc-shaped and located in the gap between two adjacent positioning blocks 201. During operation, the first electric push rod 2021 extends upward, driving the push block 2022 to rise via the spring telescopic rod. The push block 2022 lifts the paper tube 100 upward from below, and the paper tube 100 moves upward along the guide surface of the positioning block 201 to the grinding station. The spring telescopic rod provides elastic compensation when the paper tube 100 is clamped and tightened, preventing rigid contact from causing the ends of the paper tube 100 to crush.

[0036] like Figure 3 and Figure 4 As shown, the polishing mechanism 300 includes an inner and outer polishing assembly 310 and a first frame 340. The first frame 340 is a frame structure, and the inner and outer polishing assembly 310 is integrally mounted on the first frame 340. The inner and outer polishing assembly 310 also includes a synchronous pulley 320 and a second electric push rod 330. The synchronous pulley 320 is mounted on a rotating shaft 311 and is connected to a first rotary drive component installed inside the first frame 340 via a synchronous belt. The first rotary drive component drives the synchronous pulley 320 and the rotating shaft 311 to rotate. The second electric push rod 330 is installed inside the first frame 340, and its output end is connected to the housing of the inner and outer polishing assembly 310 via a bearing. It is used to drive the inner and outer polishing assembly 310 to feed or retract along the axial direction of the paper tube 100. During polishing, the second electric push rod 330 drives the inner and outer polishing components 310 to feed towards the paper tube 100, so that the V-shaped working surfaces of the inner polishing block 3121 and the outer polishing block 3131 fit into the port of the paper tube 100; after polishing is completed, the drive retracts.

[0037] like Figure 4 , Figure 5 and Figure 6As shown, the inner and outer polishing assembly 310 is the core component of this invention, including a rotating shaft 311, an inner polishing component 312, and an outer polishing component 313. The rotating shaft 311 is arranged horizontally, with a synchronous pulley 320 mounted at one end and the inner polishing component 312 and the outer polishing component 313 mounted at the other end. The inner polishing component 312 includes an inner polishing block 3121, which is conical, with its small end facing the rotating shaft 311 and its large end facing the paper tube 100. The outer conical surface of the inner polishing block 3121 is covered with an abrasive layer for polishing the inner edge chamfer of the paper tube 100 port. The outer polishing component 313 includes an outer polishing block 3131, which is annular and sleeved on the outside of the rotating shaft 311. The inner circumferential surface of the outer polishing block 3131 is conical and covered with an abrasive layer for polishing the outer edge chamfer of the paper tube 100 port. The outer conical surface of the inner grinding block 3121 and the inner circumferential surface of the outer grinding block 3131 form a V-shaped annular gap. The paper tube 100 is inserted from the large end of the V-shaped gap. The inner edge contacts the conical surface of the inner grinding block 3121 and the outer edge contacts the inner conical surface of the outer grinding block 3131. The rotating shaft 311 drives the inner grinding block 3121 and the outer grinding block 3131 to rotate synchronously, and both sides are ground at the same time. The chamfering of the inner and outer edges of the paper tube 100 can be completed simultaneously in one feed.

[0038] Since the working surfaces of both the inner grinding block 3121 and the outer grinding block 3131 are conical, the axial contact positions on the conical surface are different when paper tubes of different diameters are inserted into the V-shaped gap—small-diameter paper tubes are inserted shallower and contact the small diameter of the conical surface; large-diameter paper tubes are inserted deeper and contact the large diameter of the conical surface, thus automatically adapting to paper tubes within a certain diameter range without the need to replace the grinding head.

[0039] like Figure 5 As shown, the outer grinding component 313 also includes a sliding component 3132, a connecting plate 3133, a threaded shaft 3134, a bearing plate 3135, and a drive motor 3136. The outer grinding block 3131 is fixed on the sliding component 3132. The sliding component 3132 is connected to the connecting plate 3133 via a bearing, allowing the sliding component 3132 to rotate with the rotating shaft 311 while the connecting plate 3133 remains stationary. The connecting plate 3133 is threadedly connected to the threaded shaft 3134. The bearing plate 3135 is fixedly mounted on the first frame 340. The threaded shaft 3134 is rotatably mounted on the bearing plate 3135 via a bearing, and one end of the threaded shaft is connected to the output shaft of the drive motor 3136 via a coupling. When it is necessary to adapt to paper tubes of different diameters, the drive motor 3136 drives the threaded shaft 3134 to rotate, which in turn drives the connecting plate 3133 to move axially through the threaded transmission. The connecting plate 3133 pushes the sliding member 3132 and the outer grinding block 3131 to move axially through the bearing, changing the diameter of the narrowest point of the V-shaped annular gap. When the outer grinding block 3131 moves towards the larger end of the inner grinding block 3121, the gap widens to adapt to large-diameter paper tubes; when it moves towards the smaller end, the gap narrows to adapt to small-sized paper tubes.

[0040] like Figure 5 and Figure 6 As shown, the inner polishing component 312 also includes a flow guide 3122. The flow guide 3122 is bowl-shaped or dome-shaped and covers the outside of the inner polishing block 3121. The opening of the flow guide 3122 faces the insertion direction of the paper tube 100, and the bottom of the flow guide 3122 is fixedly connected to the rotating shaft 311 or the housing. The inner diameter of the flow guide 3122 is larger than the maximum outer diameter of the inner polishing block 3121, forming an annular flow channel between them. During polishing, the airflow carrying debris flowing out from inside the paper tube 100 enters the flow channel through the opening of the flow guide 3122 and flows along the inner wall of the flow guide 3122 towards the cleaning mechanism 500. The flow guide 3122 serves to gather the airflow and guide the direction of the debris, preventing debris from scattering and splashing.

[0041] like Figure 1 and Figure 2 As shown, the positioning mechanism 400 is located on the side of the conveying mechanism 200 away from the grinding mechanism 300, and includes a second frame 410 and a sealing assembly 420. The second frame 410 is a frame structure, and the sealing assembly 420 is slidably mounted on the second frame 410 via a linear guide rail. The sealing assembly 420 includes a positioning disk 421 and a sealing element 422. The positioning disk 421 is disc-shaped, with a flat end face facing the paper tube 100, used to abut against the end face of the paper tube 100 away from the grinding mechanism 300, thereby achieving axial positioning of the paper tube 100. A second rotary drive is installed inside the second frame 410. The second rotary drive drives the positioning disk 421 to move axially via a lead screw or gear rack mechanism, achieving synchronous feeding with the inner and outer grinding assemblies 310. The sealing element 422 is an annular sealing ring or sealing gasket, which is disposed on the end face of the positioning disk 421 facing the paper tube 100. When the end face of the paper tube 100 abuts against the positioning disk 421, the sealing element 422 is compressed, forming a seal between the end face of the paper tube 100 and the positioning disk 421 to prevent airflow from leaking from that end.

[0042] A through hole is provided in the center of the positioning plate 421. One end of the exhaust pipe 520 of the cleaning mechanism 500 is sealed and connected to this through hole, and the other end is connected to the blower 510. During polishing, one end of the paper tube 100 is sealed and abutted against the positioning plate 421 via the sealing element 422, and the other end is inserted into the V-shaped annular gap of the inner and outer polishing components 310. The V-shaped gap partially closes the other end of the paper tube 100, thereby forming a relatively closed air chamber inside the paper tube 100. The blower 510 sends positive pressure airflow into the paper tube 100 through the exhaust pipe 520. The air pressure inside the paper tube 100 increases, and under the action of the pressure difference between the inside and outside, the wall of the paper tube 100 is uniformly tightened outward, realizing the circumferential tightening and positioning of the paper tube 100. This internal air pressure tightening method has uniform pressure, avoiding the problem of crushing and deformation of the thin paper tube end caused by external clamping force, and the tightening force is evenly distributed along the circumference, resulting in good roundness of the paper tube.

[0043] It is worth noting that a pressure sensor is set in the middle area of ​​the contact surface between the positioning disk 421 and the paper tube 100 to detect the internal pressure of the paper tube 100 at all times and dynamically adjust the internal pressure of the paper tube 100 to ensure that the air pressure is not too high and causes the paper tube 100 to burst or deform.

[0044] like Figure 2 and Figure 8 As shown, the cleaning mechanism 500 includes a fan 510, an exhaust pipe 520, an inlet pipe 530, a collection box 540, and a guide pipe 550. The outlet end of the fan 510 is connected to the exhaust pipe 520, which communicates with the inside of the paper tube 100 through the through hole of the positioning plate 421, forming an air supply and tensioning air passage. One end of the guide pipe 550 extends to the opening of the guide shroud 3122 and the outer grinding block 3131, aligned with the grinding area, and the other end is connected to the collection box 540. The collection box 540 is equipped with a filter element, and the inlet pipe 530 connects the outlet end of the collection box 540 and the inlet end of the fan 510, forming a return air passage. During operation, the airflow from the blower 510 enters the paper tube 100 through the exhaust pipe 520, causing the paper tube 100 to expand. The airflow exits from the polishing end of the paper tube 100 (i.e., the end inserted into the V-shaped gap), carrying paper debris generated during polishing. The debris-laden airflow is guided by the openings of the guide shroud 3122 and the outer polishing block 3131 into the guide pipe 550, and then enters the collection box 540. The filter element in the collection box 540 intercepts and filters the debris, and the clean gas flows back to the blower 510 through the inlet pipe 530, forming a closed-loop air path. This air path design allows a single blower to simultaneously achieve both air-forced expansion and positioning and dust collection functions, while maintaining a closed-loop gas circulation without emitting dust externally.

[0045] When the blower 510 supplies airflow into the paper tube 100, causing the wall of the paper tube 100 to expand outward, the outer diameter of the paper tube 100 will increase slightly. At this time, the spring telescopic rod of the conveying mechanism 200 will be elastically compressed, and the push block 2022 will slightly retract downward under the compensating action of the spring telescopic rod, so that the push block 2022 always maintains contact with the outer surface of the paper tube 100 but does not restrict the radial expansion of the paper tube 100, ensuring that the paper tube 100 is not subject to external rigid constraints in the expanded state. After the polishing is completed, the blower 510 stops supplying air, the pressure difference between the inside and outside of the paper tube 100 disappears, the wall of the paper tube 100 elastically retracts to its original size, and the spring telescopic rod simultaneously releases its elastic force to reset the push block 2022.

[0046] Working principle and usage process of this invention:

[0047] In use, the conveying mechanism 200 conveys the paper tube 100 to be polished to the bottom of the processing station. The first electric push rod 2021 is activated, and the push block 2022 is pushed up through the spring telescopic rod. The push block 2022 lifts the paper tube 100 from below. The paper tube 100 moves upward along the guide surface of the positioning block 201 to the polishing station, so that the axis of the paper tube 100 is aligned with the axis of the inner and outer polishing components 310 and the positioning mechanism 400.

[0048] The second electric push rod 330 and the second rotary drive unit move synchronously, driving the inner and outer grinding components 310 and the sealing component 420 to move towards each other from both sides. The V-shaped gap between the outer grinding block 3131 and the inner grinding block 3121 is fitted into the port of the paper tube 100 from one end, and the positioning plate 421 abuts against the end face of the paper tube 100 from the other end, and the sealing component 422 seals. The drive motor 3136 is pre-started according to the paper tube wall thickness to adjust the axial position of the outer grinding block 3131 so that the width of the V-shaped gap matches the paper tube wall thickness.

[0049] The first rotary drive unit is activated, driving the rotating shaft 311, inner grinding block 3121, and outer grinding block 3131 to rotate via the synchronous pulley 320 and synchronous belt. Simultaneously, the blower 510 is activated, sending positive pressure airflow into the paper tube 100 through the exhaust pipe 520. The increased air pressure inside the paper tube 100 causes the paper tube wall to expand outward, achieving circumferential tensioning and positioning. The spring telescopic rod is synchronously compressed to compensate for the tensioning deformation. The inner grinding block 3121 grinds the inner edge chamfer of the paper tube, and the outer grinding block 3131 grinds the outer edge chamfer of the paper tube, forming both sides simultaneously.

[0050] The airflow from the paper tube grinding end carries debris and is guided by the guide hood 3122 to the guide pipe 550, then flows into the collection box 540 for filtration. The clean gas flows back to the fan 510 for closed-loop circulation through the air inlet pipe 530. After grinding is completed, the fan 510 stops blowing air, the paper tube 100 retracts, the second electric push rod 330 and the second rotary drive drive drive the inner and outer grinding components 310 and the sealing component 420 to retract, the first electric push rod 2021 retracts, the push block 2022 descends, and the paper tube 100 falls back onto the positioning block 201, completing one grinding cycle.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paper tube edge grinding device, characterized in that: It includes a conveying mechanism (200), a grinding mechanism (300), a positioning mechanism (400), and a cleaning mechanism (500); The conveying mechanism (200) is used to support the paper tube (100); The polishing mechanism (300) includes an inner and outer polishing assembly (310) and a first frame (340). The inner and outer polishing assembly (310) is mounted on the first frame (340). The inner and outer polishing assembly (310) includes a rotating shaft (311), an inner polishing component (312), and an outer polishing component (313). The inner polishing component (312) includes an inner polishing block (3121), which is conical and mounted on the rotating shaft (311). The outer polishing component (313) includes an outer polishing block (3131), which is annular and sleeved on the outside of the rotating shaft (311). An annular gap is formed between the inner polishing block (3121) and the outer polishing block (3131) for the insertion of the paper feed tube (100) port. The positioning mechanism (400) is located on the side of the conveying mechanism (200) away from the grinding mechanism (300) and is used to axially position the paper tube (100); The cleaning mechanism (500) is connected to the polishing mechanism (300) and the positioning mechanism (400) to collect the debris generated during polishing and to tighten the paper tube (100) by means of wind.

2. The paper tube edge grinding device according to claim 1, characterized in that: The conveying mechanism (200) is equipped with a positioning block (201) and a pushing assembly (202). The positioning block (201) is used to support the paper tube (100). The pushing assembly (202) includes a first electric push rod (2021) and a pushing block (2022). The output end of the first electric push rod (2021) is elastically connected to the pushing block (2022) through a spring telescopic rod. The pushing block (2022) pushes the paper tube (100) upward to the grinding station under the drive of the first electric push rod (2021). The positioning block (201) is used to limit the paper tube (100).

3. The paper tube edge grinding device according to claim 1, characterized in that: The inner and outer polishing assembly (310) further includes a synchronous pulley (320) and a second electric push rod (330). The synchronous pulley (320) is mounted on the rotating shaft (311) and is connected to the first rotary drive unit installed inside the first frame (340) via a synchronous belt to drive the rotating shaft (311) to rotate. The second electric push rod (330) is installed inside the first frame (340) and is connected to the inner and outer polishing assembly (310) via a bearing to drive the inner and outer polishing assembly (310) to feed or retract along the axial direction of the paper tube (100).

4. The paper tube edge grinding device according to claim 2, characterized in that: The inner polishing component (312) also includes a flow guide (3122), which covers the outside of the inner polishing block (3121). The opening of the flow guide (3122) faces the insertion direction of the paper tube (100) and is used to guide the debris and airflow generated by polishing towards the cleaning mechanism (500).

5. The paper tube edge grinding device according to claim 4, characterized in that: The outer grinding component (313) further includes a sliding component (3132), a connecting plate (3133), a threaded shaft (3134), a bearing plate (3135), and a drive motor (3136). The outer grinding block (3131) is fixed on the sliding component (3132). The sliding component (3132) is connected to the connecting plate (3133) through a bearing. The connecting plate (3133) is threadedly connected to the threaded shaft (3134). The bearing plate (3135) is mounted on the first frame (340). The threaded shaft (3134) is rotatably mounted on the bearing plate (3135) and is connected to the drive motor (3136) for transmission. The drive motor (3136) drives the threaded shaft (3134) to rotate, so as to drive the sliding component (3132) and the outer grinding block (3131) to move axially through the connecting plate (3133), thereby adjusting the width of the annular gap.

6. The paper tube edge grinding device according to claim 5, characterized in that: The outer conical surface of the inner grinding block (3121) and the inner circumferential surface of the outer grinding block (3131) are both conical surfaces. During grinding, the cross-section of the grinding surface generated by the rotation of the annular gap between the two is V-shaped. The paper tube (100) port is inserted from the large end of the annular gap. The inner grinding block (3121) grinds the inner edge of the paper tube (100) port, and the outer grinding block (3131) grinds the outer edge of the paper tube (100) port.

7. The paper tube edge grinding device according to claim 5, characterized in that: The positioning mechanism (400) includes a second frame (410) and a sealing assembly (420). The sealing assembly (420) slides on the second frame (410). The sealing assembly (420) includes a positioning disk (421) and a sealing element (422). The positioning disk (421) is used to abut against the end face of the paper tube (100) away from the grinding mechanism (300) to achieve axial positioning. A second rotary drive for axial movement of the positioning disk (421) is installed inside the second frame (410). The sealing element (422) is disposed on the side of the positioning disk (421) facing the paper tube (100) to form a seal between the end face of the paper tube (100) and the positioning disk (421).

8. The paper tube edge grinding device according to claim 7, characterized in that: The positioning disk (421) has a through hole in the center. The cleaning mechanism (500) includes an exhaust pipe (520). One end of the exhaust pipe (520) is connected to the through hole of the positioning disk (421), and the other end is connected to the blower (510). During polishing, one end of the paper tube (100) is sealed and abutted against the positioning disk (421) through the sealing element (422), and the other end is inserted into the annular gap, so that a relatively closed air chamber is formed inside the paper tube (100). The blower (510) sends airflow into the paper tube (100) through the exhaust pipe (520). The air pressure inside the paper tube (100) increases, causing the wall of the paper tube (100) to expand outward, thereby realizing the circumferential expansion and positioning of the paper tube (100).

9. The paper tube edge grinding device according to claim 8, characterized in that: The cleaning mechanism (500) also includes an air inlet pipe (530), a collection box (540), and a guide pipe (550); one end of the guide pipe (550) extends to the opening of the flow guide shroud (3122) and the outer polishing block (3131), and the other end is connected to the collection box (540); the airflow sent by the fan (510) enters the paper tube (100) through the exhaust pipe (520) to make the paper tube (100) tighten, and then flows out from the polishing end of the paper tube (100) carrying polishing debris. The opening of the flow guide shroud (3122) and the outer polishing block (3131) guides the debris-containing airflow to the guide pipe (550). The debris-containing airflow enters the collection box (540) through the guide pipe (550) for filtration and collection. The air inlet pipe (530) is connected to the fan (510) to return the gas.

10. The paper tube edge grinding device according to claim 8, characterized in that: The positioning block (201) is a V-shaped block or an arc-shaped block, used to radially limit and guide the paper tube (100) during the process of the push block (2022) pushing the paper tube (100) upward to the grinding station; when the fan (510) sends airflow into the paper tube (100) to make the paper tube (100) wall expand outward, the outer diameter of the paper tube (100) increases, and the spring telescopic rod generates elastic compression to compensate for the expansion deformation of the paper tube (100), so that the push block (2022) always keeps in contact with the paper tube (100) and does not restrict the radial expansion of the paper tube (100).

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