Permanent magnet ferrite sintering kiln

Abstract

The application discloses a kiln for permanent magnet ferrite sintering, which comprises a kiln body and a heating bin installed on the top of the kiln body, a support plate is fixed to the inner wall of the kiln body, and a plurality of groups of ventilation holes are formed in the support plate; a ventilation mechanism is arranged in the kiln body, the ventilation mechanism comprises an upper ventilation pipe, a lower ventilation pipe and an air pump, the upper ventilation pipe is connected with the lower ventilation pipe through the air pump, the input end of the air pump is connected with the upper ventilation pipe, and the output end of the air pump is connected with the lower ventilation pipe; an air inlet is formed in the top end of the upper ventilation pipe, and an air outlet is formed in the bottom end of the lower ventilation pipe. The kiln for permanent magnet ferrite sintering can input the hot air on the top of the support plate to the bottom of the support plate through the air pump, so that the heating effect on the permanent magnet ferrite can be accelerated, and the upper ventilation pipe and the lower ventilation pipe can move along the length direction of the support plate along with the operation of the motor, so that the circulation of the hot air is further accelerated, and the internal furnace body can be heated comprehensively.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet ferrite sintering technology, specifically to a kiln for permanent magnet ferrite sintering. Background Technology

[0002] Permanent magnet ferrite is made from SrO or BaO and ferric oxide through ceramic processing. Magnetic materials are the basic functional materials in the electronics industry. As an important component of magnetic materials, permanent magnet materials play an important role in the electronics industry, information industry, motorcycle industry, power tool industry, automobile industry and other industries. In the actual processing and production process of permanent magnet ferrite, sintering and molding processes are involved.

[0003] For example, a Chinese authorized patent, publication number CN209655807U, describes a special electric kiln for sintering permanent magnet ferrite, comprising a furnace body, a fan, a support plate, and an insulation sleeve. The fan is installed on the left side of the furnace body, with its lower part connected to the lower interior of the furnace body via an intake pipe, and its upper part connected to the upper interior of the furnace body via an exhaust pipe. A sliding groove is provided on the upper interior of the furnace body. Fixed rods are fixed around the perimeter of the support plate, a slider is fixed to the bottom of the support plate, and rollers are fixed to the top of the support plate. The surfaces of the intake and exhaust pipes are connected to the insulation sleeve. This special electric kiln for sintering permanent magnet ferrite, equipped with a fan, circulates the temperature inside the furnace body through the intake and exhaust pipes, resulting in more uniform heating of the permanent magnets inside the furnace. Simultaneously, the insulation sleeves on the surfaces of the intake and exhaust pipes are made of rubber insulation material, which reduces temperature loss during flow and improves the effectiveness of the device.

[0004] In the aforementioned prior art, hot air is circulated by a fan. However, the hot air will still rise during circulation, resulting in the hot air always being above the kiln. This addresses the problem of uneven heating during the processing of permanent magnet ferrite, leading to uneven heating of the permanent magnet.

[0005] For example, a roller kiln for sintering permanent magnet ferrite tiles, with announcement number CN212362816U, is applied in the field of tile processing. It solves the technical problem that existing tile sintering kilns are too cumbersome and lack integration. The key technical point is that it includes a kiln body, characterized by: the kiln body comprising an evaporation chamber, a sintering chamber, and a transition chamber arranged vertically in sequence; a feed inlet on the side wall of the kiln body, which is connected to one end of the evaporation chamber; a discharge port one on the side of the evaporation chamber away from the feed inlet; a discharge port two on the side of the sintering chamber away from the discharge port one; a discharge port on the side wall of the kiln body that is connected to the transition chamber; a discharge plate at the discharge port one and discharge port two, which is slidably connected to the side wall of the kiln body; a horizontal push rod on the discharge plate; and a heating chamber on the side wall of the kiln body located on one side of the sintering chamber. This design improves the integration of kiln equipment and reduces energy consumption.

[0006] The aforementioned prior art uses a heating chamber set on the side wall; however, hot air still cannot circulate. When processing permanent magnet ferrite, the hot air will rise and reduce its contact with the raw material, thus affecting the heating uniformity of the equipment and causing insufficient heating of the raw material.

[0007] Therefore, it is particularly important for kilns to heat permanent magnet ferrites more evenly, and there is an urgent need for a kiln with uniform heating to solve the above-mentioned technical problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a kiln for sintering permanent magnet ferrite. It utilizes a combination of a support plate, ventilation holes, upper and lower ventilation pipes, an air pump, an air inlet, an air outlet, slots, a lead screw, a threaded sleeve, a sliding block, a sliding groove, and a motor. The air pump draws hot air from the top of the support plate to the bottom, accelerating the heating of the permanent magnet ferrite. Furthermore, the motor allows the upper and lower ventilation pipes to move along the length of the support plate, further accelerating the flow of hot air and ensuring comprehensive heating within the furnace. This invention solves the problems raised in the prior art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a kiln for sintering permanent magnet ferrite, comprising a kiln body and a heating chamber installed on the top of the kiln body, wherein a support plate is fixed to the inner wall of the kiln body, and the support plate has several sets of ventilation holes inside. The kiln body is equipped with a ventilation mechanism, which includes an upper ventilation pipe, a lower ventilation pipe and an air pump. The upper ventilation pipe is connected to the lower ventilation pipe through the air pump. The input end of the air pump is connected to the upper ventilation pipe and the output end is connected to the lower ventilation pipe. The upper ventilation pipe has an air inlet at its top and an air outlet at its bottom. It also includes a drive mechanism for driving the ventilation mechanism to reciprocate along the length of the support plate.

[0010] Preferably, the driving mechanism includes a slot, a lead screw, a threaded sleeve, and a motor. The outer wall of the support plate has a slot, and the inner wall of the slot is rotatably connected to the lead screw. The outer wall of the lower ventilation pipe is fixed with a threaded sleeve that is threadedly connected to the lead screw. The outer wall of the kiln body is equipped with a motor, and the output end of the motor is connected to the lead screw.

[0011] Preferably, a sliding block is fixed on the side of the lower ventilation pipe away from the threaded sleeve, and a sliding groove is provided on the outer wall of the support plate for the sliding block to slide and engage.

[0012] Preferably, a hydraulic rod is installed at the bottom end of the upper ventilation pipe, and the output end of the hydraulic rod is connected to a scraper corresponding to the top of the support plate.

[0013] Preferably, a gasket is fixed to the outer wall of the scraper, and the gasket corresponds to the permanent magnet ferrite raw material.

[0014] Preferably, a movable cylinder is fixed to the top of the scraper, and a fixed cylinder that is sleeved on the outside of the movable cylinder is fixed to the bottom of the upper ventilation pipe.

[0015] Preferably, the kiln also includes an inlet and outlet on the side wall of the main body of the kiln and a cover plate for opening or closing the inlet and outlet, and the inner wall of the inlet and outlet is fixed with a pad corresponding to the cover plate.

[0016] Preferably, a handle is fixed to the side of the cover plate away from the kiln body, and the top and bottom of the handle are both set as arcs.

[0017] Preferably, the outer wall of the kiln body is provided with a groove, the inner wall of the groove is slidably connected with a locking block, the outer wall of the cover plate is provided with a locking groove corresponding to the locking block, and a pushing plate is fixed on the side of the locking block away from the kiln body.

[0018] Preferably, a spring is provided inside the groove, with one end of the spring connected to the inner wall of the groove and the other end connected to a pop-out plate that fits against the card block.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting up a support plate, ventilation holes, upper ventilation pipe, lower ventilation pipe, air pump, air inlet, air outlet, slot, lead screw, threaded sleeve, sliding block, sliding groove and motor combination, the air pump works to input hot air from the top of the support plate to the bottom of the support plate, which can accelerate the heating effect of permanent magnet ferrite. As the motor works, the upper and lower ventilation pipes can move along the length of the support plate, further accelerating the circulation of hot air and ensuring that the furnace body can be heated evenly.

[0020] 2. By using a combination of hydraulic rods, scrapers, gaskets, fixed cylinders, and movable cylinders, the hydraulic rods drive the scrapers and gaskets to move downwards. As the upper and lower connecting pipes move, the scrapers can remove or load materials, which can enhance the efficiency of loading and unloading permanent magnet ferrite raw materials and improve the usage effect.

[0021] 3. By using a combination of cover plate, pad plate, handle, groove, locking block, push plate, pop-out plate and spring, the pop-out plate can be moved inside the groove by pulling the push plate, which will cause the spring to compress and disengage the locking block from the groove. Then, the cover plate can be removed by pulling the handle outward. This method makes it easier to install and remove the cover plate and improves the operation of the device. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cover plate structure of the present invention; Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a schematic cross-sectional view of the present invention; Figure 5 This is a schematic diagram of the air outlet structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point B.

[0023] In the diagram: 1. Kiln body; 2. Heating chamber; 311. Support plate; 312. Ventilation hole; 313. Upper ventilation pipe; 314. Lower ventilation pipe; 315. Air pump; 316. Air inlet; 317. Air outlet; 318. Slot; 319. Lead screw; 320. Threaded sleeve; 321. Sliding block; 322. Sliding groove; 323. Motor; 411. Hydraulic rod; 412. Scraper; 413. Gasket; 414. Fixed cylinder; 415. Moving cylinder; 511. Cover plate; 512. Pad plate; 513. Handle; 514. Groove; 515. Locking block; 516. Push plate; 517. Pop-out plate; 518. Spring. Detailed Implementation

[0024] 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. Example

[0025] Reference Figure 1-6 As shown, a kiln for sintering permanent magnet ferrite includes a kiln body 1 and a heating chamber 2 installed on the top of the kiln body 1. A support plate 311 is fixed on the inner wall of the kiln body 1. Several sets of ventilation holes 312 are opened inside the support plate 311. The ventilation holes 312 can achieve the ventilation effect, so that the hot air inside the kiln body 1 can move up and down, and the permanent magnet ferrite is heated evenly.

[0026] The kiln body 1 is equipped with a ventilation mechanism, which includes an upper ventilation pipe 313, a lower ventilation pipe 314, and an air pump 315. The upper ventilation pipe 313 is connected to the lower ventilation pipe 314 through the air pump 315. The input end of the air pump 315 is connected to the upper ventilation pipe 313, and the output end is connected to the lower ventilation pipe 314. An air inlet 316 is opened at the top of the upper ventilation pipe 313, and an air outlet 317 is opened at the bottom of the lower ventilation pipe 314. When the air pump 315 is turned on, the hot air above the kiln body 1 enters the upper ventilation pipe 313 through the air inlet 316, and is then transported into the lower ventilation pipe 314 by the air pump 315. Finally, the air is discharged through the air outlet 317 at the bottom of the lower ventilation pipe 314, achieving the effect of uniform distribution of hot air.

[0027] The kiln for sintering permanent magnet ferrite also includes a drive mechanism for driving the ventilation mechanism to reciprocate along the length of the support plate 311. The drive mechanism can work automatically and make the ventilation mechanism uniformly heat the kiln body 1, so that the hot air above the inside of the kiln body 1 can be located below the inside of the kiln body 1, achieving the effect of fully heating the raw materials.

[0028] The drive mechanism includes a slot 318, a lead screw 319, a threaded sleeve 320, and a motor 323. The outer wall of the support plate 311 has a slot 318, and the lead screw 319 is rotatably connected to the inner wall of the slot 318. The outer wall of the lower ventilation pipe 314 is fixed with a threaded sleeve 320 that is threadedly connected to the lead screw 319. The outer wall of the kiln body 1 is equipped with a motor 323, and the output end of the motor 323 is connected to the lead screw 319. By turning on the motor 323, the lead screw 319 is driven to rotate. Under the action of the thread, the threaded sleeve 320 drives the ventilation mechanism to move, so as to evenly distribute the hot air inside the kiln body 1 and enhance the distribution efficiency.

[0029] A sliding block 321 is fixed on the side of the lower ventilation pipe 314 away from the threaded sleeve 320. A sliding groove 322 is provided on the outer wall of the support plate 311 for the sliding block 321 to slide and engage. The sliding block 321 and the sliding groove 322 ensure the movement stability of the ventilation mechanism.

[0030] A hydraulic rod 411 is installed at the bottom of the upper ventilation pipe 313. The output end of the hydraulic rod 411 is connected to a scraper 412 corresponding to the top of the support plate 311. By opening the hydraulic rod 411, the scraper 412 can be driven to descend, so that the scraper 412 is in contact with the top of the support plate 311. Under the action of the drive mechanism, the scraper 412 pushes the raw material out. A gasket 413 is fixed on the outer wall of the scraper 412. The gasket 413 corresponds to the permanent magnet ferrite raw material. The gasket 413 can achieve a good wear resistance effect.

[0031] The top of the scraper 412 is fixed with a movable cylinder 415, and the bottom of the upper ventilation pipe 313 is fixed with a fixed cylinder 414 that is sleeved on the outside of the movable cylinder 415. The fixed cylinder 414 and the movable cylinder 415 can provide a good guiding effect and ensure that the scraper 412 will not deviate when it moves.

[0032] The kiln for sintering permanent magnet ferrite also includes an inlet and outlet on the side wall of the kiln body 1 and a cover plate 511 for opening or closing the inlet and outlet. The inner wall of the inlet and outlet is fixed with a pad plate 512 corresponding to the cover plate 511. The pad plate 512 can be used to cover the cover plate 511 and achieve a supporting effect, so as to prevent the cover plate 511 from being embedded into the kiln body 1.

[0033] A handle 513 is fixed on the side of the cover plate 511 away from the kiln body 1. The top and bottom of the handle 513 are both set in an arc shape. The handle 513 makes it easy to pull the cover plate 511, making operation more convenient. The arc shape can also improve the comfort of operation.

[0034] The outer wall of the kiln body 1 has a groove 514, and a locking block 515 is slidably connected to the inner wall of the groove 514. The outer wall of the cover plate 511 has a slot corresponding to the locking block 515. A push plate 516 is fixed to the side of the locking block 515 away from the kiln body 1. The locking block 515 can slide along the inner wall of the groove 514 and slide into the slot to lock the cover plate 511, thereby achieving the effect of quickly disassembling or installing the cover plate 511.

[0035] A spring 518 is provided inside the groove 514. One end of the spring 518 is connected to the inner wall of the groove 514, and the other end is connected to the pop-out plate 517 that fits against the locking block 515. The spring 518 can provide a good elastic effect. In the initial state, the spring 518 can push the pop-out plate 517 and drive the locking block 515 to be embedded in the slot. In this embodiment, the pop-out plate 517 and the locking block 515 are not fixed, and the firmness of the connection of the locking block 515 is not ensured. Alternatively, the locking block 515 and the pop-out plate 517 can be fixedly connected.

[0036] Working principle: When needed, the push plate 516 is pulled to disengage the locking block 515 from the slot. At the same time, the push plate 516 causes the ejector plate 517 to slide on the inner wall of the groove 514, and the spring 518 is compressed. Then, the handle 513 is pulled away from the kiln body 1 to disengage the cover plate 511 from the kiln body 1, opening the inlet and outlet. The operator then places the permanent magnet ferrite on the support plate 311. By opening the heating chamber 2 to heat the inside of the kiln body 1, the heated hot air will stay in the upper part of the kiln body 1. By opening the air pump 315, the hot air is introduced through the air inlet 316 and discharged through the upper ventilation pipe 313, the lower ventilation pipe 314 and the air outlet 317, so that the hot air can be transported to the lower part of the kiln body 1. The motor 323 is turned on to drive the lead screw 319 to rotate. Under the action of the thread, the threaded sleeve 320 and the ventilation mechanism move back and forth along the length of the kiln body 1, thereby providing comprehensive heating treatment inside the kiln body 1 and improving the heating uniformity of the permanent magnet ferrite.

[0037] When material needs to be discharged, the hydraulic rod 411 is activated to drive the scraper 412 and the pad 413 to move, so that the scraper 412 is in contact with the top of the support plate 311. When the motor 323 is turned on, it drives the ventilation mechanism to move towards the inlet and outlet, and scrapes the permanent magnet ferrite raw material out of the inlet and outlet through the pad 413, thus achieving an automated material discharge effect.

[0038] 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 kiln for sintering permanent magnet ferrite, comprising a kiln body (1) and a heating chamber (2) installed on the top of the kiln body (1), characterized in that: The inner wall of the kiln body (1) is fixed with a support plate (311), and the support plate (311) has several sets of ventilation holes (312) inside. The kiln body (1) is equipped with a ventilation mechanism, which includes an upper ventilation pipe (313), a lower ventilation pipe (314) and an air pump (315). The upper ventilation pipe (313) is connected to the lower ventilation pipe (314) through the air pump (315). The input end of the air pump (315) is connected to the upper ventilation pipe (313) and the output end is connected to the lower ventilation pipe (314). The upper ventilation pipe (313) has an air inlet (316) at its top end, and the lower ventilation pipe (314) has an air outlet (317) at its bottom end. It also includes a drive mechanism for driving the ventilation mechanism to reciprocate along the length of the support plate (311).

2. The kiln for sintering permanent magnet ferrite according to claim 1, characterized in that: The driving mechanism includes a slot (318), a lead screw (319), a threaded sleeve (320), and a motor (323). The outer wall of the support plate (311) is provided with a slot (318), and the inner wall of the slot (318) is rotatably connected to the lead screw (319). The outer wall of the lower ventilation pipe (314) is fixed with a threaded sleeve (320) that is threadedly connected to the lead screw (319). The outer wall of the kiln body (1) is equipped with a motor (323), and the output end of the motor (323) is connected to the lead screw (319).

3. The kiln for sintering permanent magnet ferrite according to claim 2, characterized in that: A sliding block (321) is fixed on the side of the lower ventilation pipe (314) away from the threaded sleeve (320), and a sliding groove (322) is provided on the outer wall of the support plate (311) for the sliding block (321) to slide and engage.

4. The kiln for sintering permanent magnet ferrite according to claim 1, characterized in that: A hydraulic rod (411) is installed at the bottom of the upper ventilation pipe (313), and the output end of the hydraulic rod (411) is connected to a scraper (412) corresponding to the top of the support plate (311).

5. A kiln for sintering permanent magnet ferrite according to claim 4, characterized in that: A gasket (413) is fixed to the outer wall of the scraper (412), and the gasket (413) corresponds to the permanent magnet ferrite raw material.

6. The kiln for sintering permanent magnet ferrite according to claim 4, characterized in that: The scraper (412) has a movable cylinder (415) fixed at the top, and the upper ventilation pipe (313) has a fixed cylinder (414) that is sleeved on the outside of the movable cylinder (415) fixed at the bottom.

7. The kiln for sintering permanent magnet ferrite according to claim 1, characterized in that: It also includes an inlet and outlet on the side wall of the kiln body (1) and a cover plate (511) for opening or closing the inlet and outlet, the inner wall of which is fixed with a pad plate (512) corresponding to the cover plate (511).

8. A kiln for sintering permanent magnet ferrite according to claim 7, characterized in that: A handle (513) is fixed on one side of the cover plate (511) away from the kiln body (1), and the top and bottom of the handle (513) are both set as arc shape.

9. A kiln for sintering permanent magnet ferrite according to claim 7, characterized in that: The outer wall of the kiln body (1) is provided with a groove (514), and a locking block (515) is slidably connected to the inner wall of the groove (514). The outer wall of the cover plate (511) is provided with a slot corresponding to the locking block (515). A push plate (516) is fixed on the side of the locking block (515) away from the kiln body (1).

10. A kiln for sintering permanent magnet ferrite according to claim 9, characterized in that: A spring (518) is provided inside the groove (514). One end of the spring (518) is connected to the inner wall of the groove (514), and the other end is connected to a pop-out plate (517) that fits against the card block (515).

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