Magnetic column nail roller sleeve based on built-in permanent magnet and manufacturing method

Abstract

The invention discloses a magnetic column nail roller sleeve based on a built-in permanent magnet and a manufacturing method, and relates to the technical field of roller mill roller sleeves. A strip-shaped groove hole is formed in the roller sleeve base body in the circumferential direction; the permanent magnets are mounted in the strip-shaped slotted holes; the same-direction end parts of the adjacent permanent magnets are opposite in magnetism; the plugging pieces are installed at the ends of the permanent magnets and detachably closed on the two side faces of the roller sleeve base body; the column nails are evenly distributed on the surface of the roller sleeve base body, and the technical problem that an existing magnetic material lacks a non-contact mode to form a protective material pad is solved.

Description

Technical Field

[0001] This invention relates to the field of roller sleeve technology for roller mills, specifically to a magnetic pin roller sleeve based on a built-in permanent magnet and its manufacturing method. Background Technology

[0002] The pinned roller sleeve is a core, easily worn component of a roller mill. Its wear resistance is improved by embedding hard alloy pins into the roller sleeve base. The working principle of the pinned roller sleeve relies on the stable "cushion" layer formed on the roller surface when the material is rolled, so that abrasion mainly occurs between the cushion and the material to be ground, rather than directly acting on the pins and the roller sleeve base, thereby significantly improving its service life.

[0003] However, in actual operation, especially when the feeding is unstable, material characteristics (such as moisture, particle size, and grindability) fluctuate, or during start-up and shutdown, the formation of the material pad is often unstable and uneven, and even local "material pad detachment" occurs. This causes the pins and roller sleeve base to be directly exposed to the high-speed flowing hard material, resulting in abnormal breakage, loosening and detachment of the pins, and rapid wear of the base, which seriously shortens the roller sleeve life and increases equipment downtime and maintenance costs.

[0004] The existing pin roller is mainly composed of a roller sleeve base, pins and pin holes. The material accumulated between the pins forms a pad, realizing the grinding principle of "material grinding material", thereby reducing the direct wear between the pins and the roller sleeve base.

[0005] To address the issue of unstable material pads, passive methods such as adjusting process parameters (e.g., material properties, material pressure, hydraulic pressure) or optimizing the arrangement of roller pins are commonly used, but these methods have limited effectiveness and poor adaptability.

[0006] 1) The magnetic pin rollers in the existing references have magnets installed on the outer circumference of the pins of the roller sleeve. The dense installation method requires professional equipment or a lot of manual time for installation, so the equipment manufacturing cost is too high.

[0007] 2) Magnets are placed on the surface of the roller and are attracted and covered by magnetic materials. If the magnets extend beyond the surface of the roller sleeve, they will be ground inside the roller mill. If the magnets do not extend beyond the surface of the roller sleeve, they will be attracted to the surface of the magnets by magnetic materials, making it difficult to clean and remove the magnetic materials.

[0008] 3) Currently, magnet installation includes various methods such as threading and bonding. When bonding, the magnet should be installed after the adhesive is applied; otherwise, it will be difficult to apply adhesive to the gap between the magnet and the roller sleeve. Currently, there is a lack of effective methods to combine magnet conveying with adhesive input to achieve uniform coating.

[0009] To address these issues, we provide a magnetic pin roller sleeve based on a built-in permanent magnet. Summary of the Invention

[0010] The purpose of this invention is to overcome the shortcomings of the prior art and provide a magnetic pin roller sleeve based on a built-in permanent magnet to solve the technical problem that existing magnetic materials lack a non-contact method for forming protective pads.

[0011] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a magnetic column nail roller sleeve based on a built-in permanent magnet, comprising:

[0012] The roller sleeve base is fitted onto the roller shaft; a strip-shaped groove is formed in the circumferential direction within the roller sleeve base.

[0013] Permanent magnets are installed in strip-shaped slots; the same-direction ends of adjacent permanent magnets have opposite magnetic properties.

[0014] The sealing component is installed at the end of the permanent magnet and can be detachably closed on both sides of the roller sleeve base;

[0015] The studs are evenly distributed on the surface of the roller sleeve substrate;

[0016] A non-magnetic filler layer fills the gap between the permanent magnet and the inner wall of the slot.

[0017] In a further technical solution, the length of the permanent magnet is less than the length of the roller sleeve base;

[0018] The outer end of the sealing element is flush with the side of the roller sleeve base.

[0019] In a further technical solution, the sealing component includes a slotted blind plate, which is fixed to the roller sleeve base by screws.

[0020] In a further technical solution, the roller sleeve substrate has multiple sets of pin hole groups, and each set of pin hole groups has pin holes arranged at equal intervals; pins are installed in the pin holes.

[0021] Multiple sets of strip-shaped slots are distributed circumferentially, with the center of the circle located on the central axis of the roller shaft; the number of the pin hole groups is greater than the number of strip-shaped slots;

[0022] The distance from the slotted hole to the surface of the roller sleeve substrate is less than the distance from the slotted hole to the center line of the roller shaft.

[0023] In a further technical solution, the non-magnetic filling layer is an adhesive.

[0024] A method for manufacturing a magnetic pin roller sleeve based on a built-in permanent magnet includes the following steps:

[0025] Step 1: After the roller shaft and roller sleeve base are assembled and completed, insert the studs into the stud holes, and then prepare to install the permanent magnets.

[0026] Step 2: Machining strip-shaped slots in the roller sleeve substrate, and enlarging the outer ends of the strip-shaped slots to form stepped holes;

[0027] Step 3: Clean, deburr, and blow away the inner wall of the processed strip groove to ensure that there are no metal shavings or oil stains, so as to provide a clean surface for the installation of the permanent magnet;

[0028] Step 4: First, close the stepped hole on one side to install the slotted plate, and then fix it with screws;

[0029] Step 5: Arrange the ends of multiple permanent magnets with alternating N and S poles, and feed them one by one into the cleaned strip slot.

[0030] Use a gaussmeter to measure the magnetic field strength on the working surface of the roller sleeve substrate to verify whether its uniformity and strength meet the design requirements; if it does not meet the design requirements, the permanent magnet needs to be replaced before sealing.

[0031] Step 6: When the design requirements are met, take out a set of permanent magnets in sequence, and use the glue injection device to drive the permanent magnets in. The glue injection device simultaneously injects high-performance adhesive; then, at the stepped hole on the other side, use the slotted blind plate to fasten and seal the end of the permanent magnet with screws.

[0032] Step 7: Complete the installation of all permanent magnets in sequence, and seal the ends with slotted blind plates; check the height of the slotted blind plates on the side of the roller base and whether there is any glue leakage. If the requirements are met, complete the installation of the magnetic pin roller sleeve on the roller.

[0033] To address the current lack of an effective method for conveying magnets in combination with adhesive input to achieve uniform coating.

[0034] In a further technical solution, the glue injection input device includes a positioning head assembly and a connecting cylinder, wherein the positioning head assembly is threadedly connected to the connecting cylinder; the positioning head assembly is movably engaged with the stepped hole; the permanent magnet is inserted from one end of the connecting cylinder, passes through the positioning head assembly, and enters the stepped hole and the strip-shaped slot; a glue tube is installed outside the positioning head assembly and inserted into the positioning head assembly for glue injection.

[0035] In a further technical solution, the positioning head assembly includes a head body and a positioning plate. The positioning plate is a conical annular plate with an annular groove on its surface. The annular groove is used to engage with the outer edge of the stepped hole. The positioning plate is detachably connected to the head body.

[0036] The head body is provided with a central hole, which is coaxial with and connected to the connecting cylinder. The inner diameters of both the central hole and the connecting cylinder are larger than the outer diameter of the permanent magnet.

[0037] A glue injection nozzle and a ball bearing are respectively installed in the central hole. An elastic element is provided on the pulley, which holds the ball bearing against the surface of the permanent magnet. The glue injection nozzle is located on the side of the ball bearing facing the slot.

[0038] In a further technical solution, a transition hole is provided inside the head body, and a glue delivery pipe is installed inside the transition hole; a regulating valve is installed on the glue delivery pipe, and the regulating valve extends outside the head body and is used to regulate the flow rate inside the glue delivery pipe.

[0039] In a further technical solution, cross grooves are respectively opened at both ends of the permanent magnet; an end cylinder is detachably installed at the end of the connecting cylinder away from the strip slot hole, and a push rod is spirally installed in the end cylinder. A cross plate is installed in the connecting cylinder on the push rod, and the cross plate is adapted to the cross groove; a rotating handle is detachably installed at the end of the push rod outside the connecting cylinder, which is used to rotate the push rod to push the permanent magnet into the step hole and the strip slot hole.

[0040] The structure of this invention consists of a roller sleeve base, a strip-shaped slot, a permanent magnet, a slotted plate, a pin hole, and a pin. A strip-shaped slot is made in the roller sleeve base, the permanent magnet is embedded in the slot and firmly sealed to ensure that the permanent magnet does not come into contact with the material, and then the pin is embedded in the roller sleeve base in a conventional manner.

[0041] During operation, the magnetic field on the surface of the roller sleeve substrate actively attracts ferromagnetic particles in the material, quickly forming a uniform, stable, and non-detachable protective pad. This pad effectively isolates the material from direct contact with the roller sleeve substrate, thereby significantly reducing wear and extending the service life of the roller sleeve substrate and the pins.

[0042] Compared with existing technologies, it has the following advantages:

[0043] (1) This invention generates a continuous magnetic field on the roller surface by using a built-in permanent magnet. When processing materials containing ferromagnetic substances, the magnetic field actively attracts these materials, forming a uniform and dense protective pad on the roller surface quickly and stably. This fundamentally solves the problem of unstable pad caused by feeding fluctuations and start-up / shutdown, greatly reducing the direct wear and impact between the pins and the substrate, and significantly improving the lifespan of the magnetic roller sleeve compared to the traditional pin roller sleeve structure.

[0044] (2) This invention uses a glue-injection device to align the permanent magnet with the input slot, and to inject glue onto the surface of the permanent magnet during input. Precise alignment and guidance are achieved by matching the edge of the annular groove with the stepped hole. Furthermore, elastic elements and ball bearings are installed to maintain the direction of the permanent magnet's normal forward movement and ensure smooth pushing; the glue tube, through the glue delivery pipe and glue nozzle, achieves uniform glue injection.

[0045] (3) By setting the connection between the cross groove and the cross plate, when the push rod is pushed in a spiral, it can drive the permanent magnet to move forward in a spiral shape. Then, under the action of the glue injection nozzle, the glue injection mark on the permanent magnet is spiral. In this way, the glue in the circumference of the permanent magnet inserted into the strip groove is evenly distributed, thus solving the technical problem that it is difficult to apply glue to the gap of the magnet installed on the roller sleeve. Attached Figure Description

[0046] Figure 1 This is a three-dimensional structural diagram of the magnetic pin roller sleeve of the present invention mounted on the roller shaft;

[0047] Figure 2 This is a half-sectional schematic diagram of the roller sleeve base of the present invention;

[0048] Figure 3 This is a half-sectional schematic diagram of the roller sleeve base of the present invention (with sealing components and permanent magnets installed).

[0049] Figure 4 This is a side view schematic diagram of the magnetic pin roller sleeve of the present invention mounted on the roller shaft;

[0050] Figure 5 This is a side view schematic diagram of the permanent magnet of the present invention installed in the strip-shaped slot;

[0051] Figure 6 This is a schematic diagram of the magnetic poles of the permanent magnet inside the rolled sleeve substrate of the present invention;

[0052] Figure 7 This is a schematic diagram of the adhesive input device of the present invention;

[0053] Figure 8 This is a cross-sectional schematic diagram of the glue injection input device of the present invention;

[0054] Figure 9 for Figure 8 Enlarged view of part A;

[0055] Figure 10 This is a cross-sectional schematic diagram of another glue injection input device according to the present invention;

[0056] Figure 11 This is a schematic diagram of the push rod of the present invention.

[0057] In the picture:

[0058] 1. Roller sleeve base; 2. Strip groove; 21. Stepped hole; 3. Permanent magnet; 31. Cross groove; 4. Column nail; 5. Slotted hole blank plate; 6. Column nail hole; 7. Non-magnetic filling layer;

[0059] 8. Glue input device; 81. Connecting cylinder; 82. Glue hose; 83. Head body; 84. Positioning plate; 85. Annular groove; 86. Glue nozzle; 87. Ball bearing; 88. Elastic element; 89. Glue delivery pipe; 810. Adjusting valve; 811. End cylinder; 812. Push rod; 813. Cross plate; 814. Rotating handle;

[0060] 100. Roller shaft. Detailed Implementation

[0061] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0062] Example 1

[0063] Please see Figure 1-6 The present invention provides a technical solution for a magnetic pin roller sleeve based on a built-in permanent magnet, comprising:

[0064] like Figure 1 As shown, the roller sleeve base 1 is fitted onto the roller shaft 100; the roller sleeve base can be installed on the roller shaft using existing technologies, such as pressure method and temperature method, but attention needs to be paid to the interference fit. Figure 2 As shown, a strip-shaped groove 2 is provided in the inner circumferential direction of the roller sleeve base 1;

[0065] Permanent magnets 3 are installed within the strip-shaped slots 2; the ends of adjacent permanent magnets 3 in the same direction have opposite magnetic properties; permanent magnets are embedded within the strip-shaped slots 2, with the N and S poles of all permanent magnets arranged alternately to form a complete annular magnetic circuit. The cross-sectional shape of the strip-shaped slots can be circular, elliptical, or fan-shaped; in this embodiment, it is circular.

[0066] The sealing component is installed at the end of the permanent magnet 3 and can be detachably closed on both sides of the roller sleeve base 1;

[0067] The pins 4 are evenly distributed on the surface of the roller sleeve base 1. Figure 1 In this case, the number of the pin hole group is greater than the number of the strip slot hole 2.

[0068] like Figure 2 As shown, the length of the permanent magnet 3 is less than the length of the roller sleeve base 1; the outer end of the sealing component is flush with the side of the roller sleeve base 1. The sealing component includes a slotted blind plate 5, which is fixed to the roller sleeve base 1 by screws. Four sets of screws are respectively provided on the slotted blind plate for insertion and installation on the roller sleeve base.

[0069] Combination Figure 1 and Figure 2 As shown, multiple sets of pin holes are arranged on the roller sleeve base 1, and each set of pin holes has pin holes 6 arranged at equal intervals.

[0070] like Figure 3 As shown, a stud 4 is installed in the stud hole 6.

[0071] like Figure 5 The image shows a side view without the slotted end plate installed. Multiple sets of strip-shaped slots 2 are distributed circumferentially, with their centers located on the central axis of the roller 100. Figure 5 The diagram shows that the magnetic properties of each group of permanent magnets on this side are alternately arranged as N and S, resulting in a uniform magnetic field distribution on the surface of the roller sleeve substrate, thus forming a complete annular magnetic circuit. For example... Figure 6 A schematic diagram showing the cross-section and unfolding of the roller sleeve substrate, illustrating the magnetic distribution of each permanent magnet within the roller sleeve substrate.

[0072] refer to Figure 4 and 5 As shown, the distance from the strip-shaped slot 2 to the surface of the roller sleeve substrate 1 is less than the distance from the strip-shaped slot 2 to the center line of the roller shaft 100. The strip-shaped slot is located in the radial middle and slightly above the middle region of the roller sleeve substrate to ensure that the magnetic lines of force can penetrate evenly to the outer surface of the roller sleeve.

[0073] The structure of this invention consists of a roller sleeve base, a strip-shaped slot, a permanent magnet, a slotted plate, a pin hole, and a pin. A strip-shaped slot is made in the roller sleeve base, the permanent magnet is embedded in the slot and firmly sealed to ensure that the permanent magnet does not come into contact with the material, and then the pin is embedded in the roller sleeve base in a conventional manner.

[0074] This invention utilizes a built-in permanent magnet to generate a continuous magnetic field on the roller surface. When processing materials containing ferromagnetic substances, the magnetic field actively attracts these materials, quickly and stably forming a uniform and dense protective pad on the roller surface. This fundamentally solves the problem of pad instability caused by feeding fluctuations and start-up / shutdown, greatly reducing direct wear and impact on the pins and substrate, and significantly improving the lifespan of the magnetic roller sleeve compared to traditional pin-mounted roller sleeve structures. By placing strip-shaped slots inside the roller sleeve substrate and arranging them in a circumferential array, a uniformly distributed magnetic field covering the entire working surface can be formed. This avoids excessively strong or weak local magnetic fields, ensuring the uniformity of the pad thickness.

[0075] The opening of the slotted hole is sealed by a slotted hole baffle and a sealing element. The surface of the slotted hole baffle is flush with the inner wall of the roller sleeve base, forming a closed cavity to prevent dust from entering.

[0076] The gap between the permanent magnet 3 and the inner wall of the slot 2 is filled with a non-magnetic filler layer 7. This filler layer serves to fix the permanent magnet and prevent it from vibrating and shifting, and also acts as a buffer layer to prevent the permanent magnet from breaking due to impact. The non-magnetic filler layer 7 is an adhesive.

[0077] Process plan: After the roller shaft and roller sleeve base are assembled and the studs are inlaid, the permanent magnets are installed.

[0078] The inner wall of the processed slot is cleaned, deburred, and blown to ensure that there are no metal shavings or oil stains, providing a clean surface for the installation of the permanent magnet.

[0079] Arrange the N and S poles of the permanent magnet alternately and place them one by one into the cleaned slot. Use high-performance adhesive to fill the slot, ensuring that all gaps between the permanent magnet and the slot are fully filled. Seal the slot opening with a slot cover plate and sealant or a sealant, and then fasten it with screws.

[0080] The magnetic field strength was measured on the working surface of the roller sleeve substrate using a gaussmeter to verify whether its uniformity and strength met the design requirements.

[0081] The magnetic strength of this invention is rationally designed to be used only for adsorbing and stabilizing the innermost material pad, and its adsorption force is much less than the rolling pressure of the roller press. Under the action of the rolling pressure, the material is normally crushed and discharged, without causing problems such as "uncrushable" or "unable to unload".

[0082] To ensure the stability and reliability of the permanent magnet under rotating, impact, and vibration operating environments, adhesive is injected into the gap between the permanent magnet and the inner wall of the slot to form a non-magnetic filling layer. This filling layer firmly bonds and encapsulates the permanent magnet within the slot, while also serving a cushioning function.

[0083] The opening of the slotted hole is sealed by a slotted hole baffle, sealant and sealing element. The surface of the slotted hole baffle is flush with the inner wall of the roller sleeve base to form a closed cavity to prevent dust from entering.

[0084] Example 2

[0085] like Figure 7-9 As shown, another embodiment of the present invention is provided. Based on embodiment 1, a method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet includes the following steps:

[0086] Step 1: After the roller shaft 100 and roller sleeve base 1 are assembled and completed, the stud 4 is embedded in the stud hole 6, and then the permanent magnet 3 is prepared for installation.

[0087] Step 2: Machining a strip-shaped slot 2 inside the roller sleeve base 1, and enlarging the outer sides of both ends of the strip-shaped slot 2 to form a stepped hole 21;

[0088] Step 3: Clean, deburr, and blow away the inner wall of the processed strip-shaped slot 2 to ensure that there are no metal shavings or oil stains, so as to provide a clean surface for the installation of the permanent magnet 3.

[0089] Step 4: First, close the stepped hole 21 on one side to install the slotted plate 5, and then fix it with screws.

[0090] Step 5: Arrange the ends of multiple permanent magnets 3 with alternating N and S poles, and feed them one by one into the cleaned strip slot 2;

[0091] The magnetic field strength was measured on the working surface of the roller sleeve substrate 1 using a gaussmeter to verify whether its uniformity and strength met the design requirements; if the design requirements were not met, the permanent magnet 3 needed to be replaced before sealing.

[0092] Step 6: When the design requirements are met, take out a set of permanent magnets 3 in sequence, and use the glue injection device 8 to drive the permanent magnets 3 into the device. The glue injection device 8 injects glue simultaneously using high-performance adhesive. Then, at the stepped hole 21 on the other side, use the slotted blind plate 5 to fasten and seal the end of the permanent magnet 3 with screws.

[0093] Step 7: Complete the installation of all permanent magnets 3 sequentially, and seal the ends with slotted end caps 5. Check the height of the slotted end caps 5 on the side of the roller base 1 and for any glue leakage. If the requirements are met, complete the installation of the magnetic pin roller sleeve on the roller 100. The normal side height is defined as being exactly right and within the acceptable error range. If the side height is too high, open the installed slotted end caps 5, remove some of the high-performance adhesive, or replace it with a thinner slotted end cap. If glue leakage is found, check if the slotted end cap is cracked. If not, clean the overflowing adhesive surface; if cracked, replace the slotted end cap.

[0094] like Figure 7 As shown, the glue injection input device 8 includes a positioning head assembly and a connecting cylinder 81. The positioning head assembly is threadedly connected to the connecting cylinder 81. The positioning head assembly is movably engaged with the stepped hole 21. The permanent magnet 3 is inserted from one end of the connecting cylinder 81, passes through the positioning head assembly, and enters the stepped hole 21 and the strip-shaped slot hole 2. A glue tube 82 is installed outside the positioning head assembly and inserted into the positioning head assembly for glue injection.

[0095] The positioning head assembly includes a head body 83 and a positioning plate 84. The positioning plate 84 is a conical annular plate with an annular groove 85 on its surface. The annular groove 85 is used to engage with the outer edge of the stepped hole 21. The positioning plate 84 is detachably connected to the head body 83.

[0096] like Figure 8 As shown, a central hole is provided in the head body 83. The central hole is coaxial with and connected to the connecting cylinder 81. The inner diameters of both the central hole and the connecting cylinder 81 are larger than the outer diameter of the permanent magnet 3. A glue injection nozzle 86 and a ball bearing 87 are respectively installed in the central hole. An elastic element 88 is provided on the pulley. The elastic element 88 abuts the ball bearing 87 against the surface of the permanent magnet 3. The glue injection nozzle 86 is located on the side of the ball bearing 87 facing the strip-shaped slot 2.

[0097] like Figure 7 As shown, a transition hole is provided inside the head body 83, and a glue delivery pipe 89 is installed inside the transition hole; a regulating valve 810 is installed on the glue delivery pipe 89, extending outside the head body 83, and the regulating valve 810 is used to regulate the flow rate inside the glue delivery pipe 89. The regulating valve can be a manual needle valve or a ball valve, used to regulate the glue flow rate inside the glue delivery pipe.

[0098] By injecting the colloid into the hose, first adjust the regulating valve to close the colloid delivery pipe, then insert the permanent magnet; then, install the insertion rod at the end of the connecting cylinder away from the strip slot, such as... Figure 8 As shown; attach the annular groove to the outer edge of the stepped hole; open the regulating valve to allow the adhesive to flow out evenly from the adhesive delivery pipe; push the permanent magnet with the insert rod into the stepped hole.

[0099] This invention uses a glue-injection device to align a permanent magnet into an input slot, and injects glue onto the surface of the permanent magnet during input. Precise alignment and guidance are achieved by matching the edge of the annular groove with the stepped hole. Furthermore, elastic elements and ball bearings are installed to maintain the permanent magnet's forward direction and ensure smooth propulsion; the glue tube, through the glue delivery pipe and injection nozzle, ensures uniform glue injection.

[0100] Example 3

[0101] like Figure 10 and 11 As shown, another embodiment of the present invention is provided. Based on embodiment 2, cross grooves 31 are respectively formed at both ends of the permanent magnet 3. Figure 10 The markings indicate that cross grooves are opened at both ends of the permanent magnet to balance the magnetic field distribution at both ends;

[0102] An end cylinder 811 is detachably installed at the end of the connecting cylinder 81 away from the strip-shaped slot 2. A push rod 812 is spirally installed inside the end cylinder 811, and a cross plate 813 is installed inside the connecting cylinder 81. Figure 11 As shown, the cross plate 813 is adapted to the cross groove 31; the push rod 812 has a detachable rotating handle 814 at the end outside the connecting cylinder 81, which is used to rotate the push rod 812 to push the permanent magnet 3 into the step hole 21 and the strip slot hole 2.

[0103] By injecting the colloid into the hose, first adjust the regulating valve to close the colloid delivery pipe, then insert the permanent magnet; next, first insert the cross plate into the cross groove, and then close the end sleeve at the end of the connecting sleeve away from the slotted hole, as shown. Figure 10 As shown; attach the annular groove to the outer edge of the stepped hole; open the regulating valve to allow the adhesive to flow out evenly from the adhesive delivery pipe; push the permanent magnet with the insert rod into the stepped hole.

[0104] In Example 2, when the permanent magnet is pushed linearly, applying adhesive to the magnet results in less adhesive on the bottom side compared to other areas, causing localized unevenness. This invention addresses this issue by connecting a cross groove and a cross plate. When the push rod is spirally pushed, it drives the permanent magnet forward in a threaded manner. Under the action of the adhesive nozzle, the adhesive application mark on the permanent magnet is spiral-shaped. This ensures a uniform distribution of adhesive around the permanent magnet inserted into the slot, thus solving the technical problem of difficulty in applying adhesive to the gap where the magnet is mounted on the roller sleeve.

[0105] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A magnetic pin roller sleeve based on a built-in permanent magnet, characterized in that, include: A roller sleeve base (1) is sleeved on a roller shaft (100); a strip-shaped groove (2) is provided in the inner circumferential direction of the roller sleeve base (1); Permanent magnet (3) is installed in the strip slot (2); the magnetic properties of the same-direction ends of adjacent permanent magnets (3) are opposite; The sealing component is installed at the end of the permanent magnet (3) and can be detachably closed on both sides of the roller sleeve base (1); The pins (4) are evenly distributed on the surface of the roller sleeve substrate (1); A non-magnetic filling layer (7) fills the gap between the permanent magnet (3) and the inner wall of the strip slot (2).

2. The magnetic pin roller sleeve based on a built-in permanent magnet according to claim 1, characterized in that, The length of the permanent magnet (3) is less than the length of the roller sleeve base (1); The outer end of the sealing element is flush with the side of the roller sleeve base (1).

3. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 2, characterized in that, The sealing component includes a slotted blind plate (5), which is fixed to the roller sleeve base (1) by screws.

4. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 2, characterized in that, The roller sleeve base (1) has multiple sets of pin holes, and each set of pin holes has pin holes (6) arranged at equal intervals; a pin (4) is installed in the pin hole (6). Multiple sets of strip-shaped slots (2) are distributed in a circular pattern, with the center of the circle located on the central axis of the roller (100); the number of the pin hole groups is greater than the number of strip-shaped slots (2); The distance from the strip groove (2) to the surface of the roller sleeve substrate (1) is less than the distance from the center line of the strip groove (2) to the roller shaft (100).

5. A magnetic pin roller sleeve based on a built-in permanent magnet according to claim 4, characterized in that, The non-magnetic filler layer (7) is an adhesive.

6. A method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet, characterized in that, Includes the following steps: Step 1: After the roller shaft (100) and roller sleeve base (1) are assembled and completed, the stud (4) is inserted into the stud hole (6), and then the permanent magnet (3) is prepared for installation. Step 2: Machining a strip-shaped slot (2) inside the roller sleeve base (1), and enlarging the outer sides of both ends of the strip-shaped slot (2) to form a stepped hole (21). Step 3: Clean, deburr and blow away the inner wall of the processed strip groove (2) to ensure that there are no metal shavings and oil stains, so as to provide a clean surface for the installation of the permanent magnet (3); Step 4: First, close the stepped hole (21) on one side to install the slotted blind plate (5) and fix it with screws; Step 5: Arrange the ends of multiple permanent magnets (3) alternately with N and S poles, and send them one by one into the cleaned strip slot (2); The magnetic field strength was measured on the working surface of the roller sleeve substrate (1) using a gaussmeter to verify whether its uniformity and strength met the design requirements; if the design requirements were not met, the permanent magnet (3) needed to be replaced before sealing. Step 6: When the design requirements are met, take out a set of permanent magnets (3) in sequence, and use the glue injection device (8) to drive the permanent magnets (3) into the glue. The glue injection device (8) injects glue simultaneously using high-performance adhesive. Then, at the stepped hole (21) on the other side, use the slotted hole plate (5) to fasten and seal the end of the permanent magnet (3) with screws. Step 7: Complete the installation of all permanent magnets (3) in sequence, and seal the ends through the slotted blind plate (5); check the height of the slotted blind plate (5) on the side of the roller base (1) and whether there is any glue leakage. If the requirements are met, complete the installation of the magnetic pin roller sleeve on the roller (100).

7. A method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet according to claim 6, characterized in that, The glue injection input device (8) includes a positioning head assembly and a connecting cylinder (81). The positioning head assembly is threadedly connected to the connecting cylinder (81). The positioning head assembly is movably engaged with the stepped hole (21). The permanent magnet (3) is inserted from one end of the connecting cylinder (81), passes through the positioning head assembly, and enters the stepped hole (21) and the strip-shaped slot (2). A glue tube (82) is installed outside the positioning head assembly and inserted into the positioning head assembly for glue injection.

8. A method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet according to claim 7, characterized in that, The positioning head assembly includes a head body (83) and a positioning plate (84). The positioning plate (84) is a conical annular plate with an annular groove (85) on its surface. The annular groove (85) is used to engage with the outer edge of the stepped hole (21). The positioning plate (84) is detachably connected to the head body (83). The head body (83) is provided with a central hole, which is coaxial with and connected to the connecting cylinder (81). The inner diameters of the central hole and the connecting cylinder (81) are both larger than the outer diameter of the permanent magnet (3). The center hole is equipped with a glue injection nozzle (86) and a ball (87). An elastic element (88) is provided on the pulley. The elastic element (88) abuts the ball (87) against the surface of the permanent magnet (3). The glue injection nozzle (86) is located on the side of the ball (87) facing the strip-shaped slot (2).

9. A method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet according to claim 8, characterized in that, The head body (83) has a transition hole, and a glue delivery pipe (89) is installed in the transition hole; a regulating valve (810) is installed on the glue delivery pipe (89), the regulating valve (810) extends to the outside of the head body (83), and the regulating valve (810) is used to regulate the flow rate in the glue delivery pipe (89).

10. A method for manufacturing a magnetic column nail roller sleeve based on a built-in permanent magnet according to claim 9, characterized in that, Cross grooves (31) are provided at both ends of the permanent magnet (3); an end cylinder (811) is detachably installed at the end of the connecting cylinder (81) away from the strip slot (2), and a push rod (812) is spirally installed inside the end cylinder (811). A cross plate (813) is installed inside the connecting cylinder (812) and the cross plate (813) is adapted to the cross groove (31); a rotating handle (814) is detachably installed at the end of the push rod (812) outside the connecting cylinder (81) for rotating the push rod (812) to push the permanent magnet (3) into the step hole (21) and the strip slot (2).

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