Magnetic core processing and firing device

Abstract

The utility model discloses a magnetic core processing and firing device, and relates to the technical field of magnetic core production. The device comprises a supporting seat, a hearth is fixedly mounted at the top of the supporting seat, an auxiliary operation mechanism is arranged on one side wall, located on the hearth, of the top of the supporting seat, a furnace cover is arranged at the bottom of the supporting seat through an external elevator, the furnace cover and the bottom of the hearth are arranged in a closed mode, and a sealing ring is arranged at the closed position of the furnace cover and the hearth. And a rotating shaft is rotationally mounted in the center of the top of the furnace cover. The magnetic core placing mechanism is arranged, and the magnetic core box is arranged to rotate and revolve at the same time, so that the heating uniformity of magnetic cores in the magnetic core box is effectively ensured, the sintering quality of the magnetic cores is ensured, and the practicability of the device is improved; impurities discharged by the magnetic core in the sintering process are effectively removed, flowing-out hot air flow is purified, the magnetic core is prevented from being polluted by the hot air flow circularly entering the furnace chamber, and the sintering quality of the magnetic core is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic core production, in particular to a magnetic core processing and firing device. Background Art

[0002] The magnetic core refers to a sintered magnetic metal oxide composed of a mixture of various iron oxides. Traditional magnetic core sintering furnaces directly place the magnetic core in the sintering furnace for sintering.

[0003] A sintering kiln for processing ferrite cores provided in the Chinese patent publication number CN216815028U comprises a kiln body, a placing plate and a heating plate; the kiln body: both sides of the interior are provided with sliders, the slide grooves on both sides of the placing plate are slidably connected with the sliders, the top of the placing plate is provided with a fixing rod, the outer side of the fixing rod is slidably connected with a hanger, both ends of the rear side surface of the placing plate are provided with electric push rods, the rear end of the electric push rod is connected with the rear side surface of the kiln body, there are two heating plates and they are respectively arranged on both sides of the interior of the kiln body, a door body is hinged on the front side surface of the kiln body, a filtering unit is arranged on the top of the kiln body, and a protective component is arranged inside the kiln body; wherein: it also comprises a controller, the controller is arranged on the left side of the kiln body, the input ends of the heating plate and the electric push rod are electrically connected to the output end of the controller, and the input end of the controller is electrically connected to the output end of an external power supply, the sintering kiln for processing ferrite cores has strong practicality, high safety and high processing efficiency.

[0004] In actual use, since the position of the heating component in the furnace is fixed, during the heating process, the magnetic core of the principle heating component and the magnetic core close to the heating self-test are heated to different degrees, the magnetic core will be heated unevenly, resulting in unstable quality of the sintered magnetic core.

[0005] For this purpose, a magnetic core processing and firing device is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that in actual use, since the position of the heating component in the furnace is fixed, the magnetic core of the principle heating component and the magnetic core close to the heating self-test are heated to different degrees during the heating process, the magnetic core will be heated unevenly, resulting in unstable quality of the sintered magnetic core. The utility model provides a magnetic core processing and firing device.

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A magnetic core processing and firing device comprises a support seat, a furnace chamber is fixedly mounted on the top of the support seat, an auxiliary operation mechanism is arranged on the top of the support seat and located on one side wall of the furnace chamber, a furnace cover is arranged on the bottom of the support seat through an external lifting machine, the furnace cover and the bottom of the furnace chamber are arranged in a closed state and a sealing ring is arranged at the closing position of the furnace cover and the furnace chamber, a rotating shaft is rotatably mounted at the center of the top of the furnace cover, and a magnetic core placing mechanism is arranged on the rotating shaft;

[0009] Specifically, in some embodiments, when a magnetic core sintering operation is required, the magnetic core to be fired is preferentially placed in the magnetic core placement mechanism, and the furnace cover is moved longitudinally by an external lifting machine, so that the furnace cover and the furnace chamber are closed. At this time, the auxiliary operating mechanism is driven to preferentially perform a vacuum treatment, and then the heating and firing are performed after the treatment is completed. While firing, the smoke impurities generated by the firing are filtered through the auxiliary operating mechanism. After the firing is completed, after keeping warm for a period of time, the user injects inert gas through the auxiliary operating mechanism for cooling.

[0010] Furthermore, the auxiliary operating mechanism includes an exhaust pipe, a fan, an exhaust pipe, a filter box, an exhaust pipe, a stop valve, a vacuum pump and an air injection pump. The fan is fixedly installed on the top of the furnace, the exhaust end of the fan is connected with the furnace through the exhaust pipe, the exhaust end of the fan is fixedly installed with a filter box through the exhaust pipe, the exhaust end of the filter box is fixedly connected with the outer wall of the furnace through the exhaust pipe, a stop valve is arranged on the exhaust pipe, a vacuum pump and an air injection pump are fixedly installed on the top of the support seat, the output ends of the vacuum pump and the air injection pump are connected with the exhaust pipe through a pipeline, and the connecting pipes of the vacuum pump and the air injection pump are provided with the same stop valve as that on the exhaust pipe, and the air injection pump is externally connected to an inert gas tank;

[0011] Specifically, before firing, vacuum treatment is preferentially performed through a vacuum pump. During firing, the fan is driven to extract the flue gas impurities in the furnace and transport them to the filter box for filtration. After firing is completed, after keeping warm for a period of time, inert gas is injected through an air injection pump for cooling.

[0012] Furthermore, the magnetic core placement mechanism includes a first gear, a mounting frame, a second gear, a motor, a third gear, a mounting shaft, a fourth gear, a fifth gear, a sixth gear, a placement plate and a support rod, the outer wall of the rotating shaft is fixedly mounted with a support rod, the number of the support rods is three groups and they are arranged in a circular array, the top of the support rod is rotatably mounted with a placement plate, the top of the placement plate is placed with a magnetic core box, the inner top of the support rod is rotatably mounted with a fourth gear, the rotating shaft of the fourth gear longitudinally penetrates the support rod and is fixedly connected to the rotating shaft of the placement plate, a fifth gear meshing with the fourth gear is rotatably mounted on one side wall of the support rod, a sixth gear is rotatably mounted on the inner wall of the support rod, the rotating shaft of the sixth gear transversely penetrates the rotating shaft and is fixedly connected to the rotating shaft of the fifth gear, the top of the furnace cover is rotatably mounted with a mounting shaft located in the center of the interior of the rotating shaft, the mounting shaft longitudinally penetrates the furnace cover and is fixedly connected to the mounting frame, and the third gear meshing with the sixth gear is fixedly mounted on the mounting shaft;

[0013] Specifically, when the rotating shaft rotates, the installation shaft cannot rotate, and the sixth gear and the third gear are meshingly arranged. At this time, the sixth gear rotates, causing the fifth gear and the fourth gear to rotate. At this time, the placement plate drives the magnetic core box to rotate for uniform heating.

[0014] Furthermore, the rotating shaft longitudinally penetrates the furnace cover and extends to the outside of the bottom of the furnace cover, a first gear is fixedly installed at one end of the rotating shaft located on the outside of the bottom of the furnace cover, a second gear meshing with the first gear is rotatably installed at the bottom of the furnace cover, a mounting frame is fixedly installed at the bottom of the furnace cover, a motor is fixedly installed at the bottom of the mounting frame, and an output end of the motor longitudinally penetrates the mounting frame and is fixedly connected to the rotating shaft of the second gear;

[0015] Specifically, the motor drives the second gear to rotate, and the second gear drives the first gear to rotate, causing the rotating shaft to rotate.

[0016] Furthermore, a slide groove is provided on the top of the placement plate, slide rods are fixedly installed on the inner walls on both sides of the slide groove, and sliders are built into the slide groove. The number of sliders is two groups and they are sequentially located on the inner walls on both sides of the slide groove. The sliders are sleeved on the slide rods and slidably connected with the slide rods. A return spring is fixedly installed on the corresponding side wall of the slider, and a clamping block is fixedly installed on the top of the slider, and a magnetic core box is clamped on one side wall of the clamping block;

[0017] Specifically, when the core box is placed on the placement plate, the user preferably separates the two sets of closed clamps, places the core box in the middle of the two sets of clamps, and clamps it to prevent the core box from falling when rotating.

[0018] Furthermore, the connection between the vacuum pump and the gas injection pump and the exhaust pipe is located directly below the stop valve on the exhaust pipe.

[0019] Furthermore, a heat-insulating filling cavity is provided in the furnace, and electromagnetic heating coils are fixedly installed on the inner wall of the furnace. The number of the electromagnetic heating coils is several groups and they are arranged at equal distances.

[0020] The beneficial effects of the utility model are as follows:

[0021] 1. The utility model provides a magnetic core placement mechanism, and sets the magnetic core box to rotate and revolve at the same time, which effectively ensures the uniformity of heating of the magnetic core in the magnetic core box, thereby ensuring the sintering quality of the magnetic core and improving the practicality of the device. At the same time, the device is provided with a filter box, which effectively removes impurities discharged from the magnetic core during the firing process, purifies the outflowing hot air flow, prevents the hot air flow circulating into the furnace cavity from contaminating the magnetic core, and further improves the sintering quality of the magnetic core. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 It is a schematic diagram of the position structure of the sealing ring of the utility model;

[0024] Figure 3 This is a schematic diagram of the first gear position structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the installation shaft position structure of the utility model;

[0026] Figure 5 This is a schematic diagram of the fourth gear position structure of the utility model;

[0027] Figure 6 It is a structural schematic diagram of the placement plate of the utility model;

[0028] 1. Support base; 2. Furnace chamber; 3. Exhaust duct; 4. Fan; 5. Exhaust duct; 6. Filter box; 7. Exhaust pipe; 8. Stop valve; 9. Vacuum pump; 10. Air injection pump; 11. Insulation filling chamber; 12. Sealing ring; 13. Furnace cover; 14. First gear; 15. Mounting frame; 16. Motor; 17. Second gear; 18. Electromagnetic heating coil; 19. Rotating shaft; 20. Third gear; 21. Mounting shaft; 22. Fourth gear; 23. Fifth gear; 24. Sixth gear; 25. Placement plate; 26. Support rod; 27. Slide rod; 28. Return spring; 29. ​​Slider; 30. Clamp; 31. Core box; 32. Slide groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] like Figures 1 to 6 As shown, a magnetic core processing and firing device comprises a support base 1, a furnace 2 is fixedly mounted on the top of the support base 1, an auxiliary operation mechanism is arranged on the top of the support base 1 and located on one side wall of the furnace 2, a furnace cover 13 is arranged on the bottom of the support base 1 through an external lifting machine, the furnace cover 13 and the bottom of the furnace 2 are arranged in a closed state, and a sealing ring 12 is arranged at the closing position of the furnace cover 13 and the furnace 2, a rotating shaft 19 is rotatably mounted at the center of the top of the furnace cover 13, and a magnetic core placement mechanism is arranged on the rotating shaft 19;

[0034] Specifically, in some embodiments, when a magnetic core sintering operation is required, the magnetic core to be fired is preferentially placed in the magnetic core placement mechanism, and the furnace cover 13 is longitudinally moved by an external lifting machine, so that the furnace cover 13 and the furnace chamber 2 are closed. At this time, the auxiliary operating mechanism is driven to preferentially perform a vacuum treatment, and then the heating and firing are performed after the treatment is completed. During the firing, the smoke impurities generated by the firing are filtered through the auxiliary operating mechanism. After the firing is completed, after keeping warm for a period of time, the user injects inert gas through the auxiliary operating mechanism for cooling.

[0035] like Figures 1 to 6 As shown, the auxiliary operating mechanism includes an exhaust pipe 3, a fan 4, an exhaust pipe 5, a filter box 6, an exhaust pipe 7, a stop valve 8, a vacuum pump 9 and an air injection pump 10. The fan 4 is fixedly installed on the top of the furnace 2. The exhaust end of the fan 4 is connected with the furnace 2 through the exhaust pipe 3. The exhaust end of the fan 4 is fixedly installed with a filter box 6 through the exhaust pipe 5. The exhaust end of the filter box 6 is fixedly connected with the outer wall of the furnace 2 through the exhaust pipe 7. The exhaust pipe 7 is provided with a stop valve 8. The top of the support seat 1 is fixedly installed with a vacuum pump 9 and an air injection pump 10. The output ends of the vacuum pump 9 and the air injection pump 10 are connected with the exhaust pipe 7 through a pipeline, and the connecting pipes of the vacuum pump 9 and the air injection pump 10 are provided with the same stop valve 8 as that on the exhaust pipe 7. The air injection pump 10 is externally connected to an inert gas tank.

[0036] Specifically, before firing, vacuum treatment is preferentially performed through a vacuum pump. During firing, the fan 4 is driven to extract the flue gas impurities appearing in the furnace 2 and transport them to the filter box 6 for filtering treatment. After firing is completed, after keeping warm for a period of time, inert gas is injected through the air injection pump for cooling treatment.

[0037] like Figures 1 to 6As shown, the magnetic core placement mechanism includes a first gear 14, a mounting frame 15, a second gear 17, a motor 16, a third gear 20, a mounting shaft 21, a fourth gear 22, a fifth gear 23, a sixth gear 24, a placement plate 25 and a support rod 26. The outer wall of the rotating shaft 19 is fixedly mounted with the support rod 26. The number of the support rods 26 is three groups and they are arranged in a circular array. The placement plate 25 is rotatably mounted on the top of the support rod 26. The magnetic core box 31 is placed on the top of the placement plate 25. The fourth gear 22 is rotatably mounted on the inner top of the support rod 26. The rotating shaft of the fourth gear 22 longitudinally penetrates the support rod 26. The fifth gear 23 meshing with the fourth gear 22 is rotatably mounted on one side wall of the support rod 26, and the sixth gear 24 is rotatably mounted on the inner wall of the support rod 26. The rotation axis of the sixth gear 24 transversely penetrates the rotation axis 19 and is fixedly connected with the rotation axis of the fifth gear 23. The top of the furnace cover 13 is located at the center of the inner part of the rotation axis 19 and is rotatably mounted with a mounting shaft 21. The mounting shaft 21 longitudinally penetrates the furnace cover 13 and is fixedly connected with the mounting frame 15. The third gear 20 meshing with the sixth gear 24 is fixedly mounted on the mounting shaft 21.

[0038] Specifically, when the rotating shaft 19 rotates, the installation shaft 21 cannot rotate, and the sixth gear 24 and the third gear 20 are meshed. At this time, the sixth gear 24 rotates, causing the fifth gear 23 and the fourth gear 22 to rotate. At this time, the placement plate 25 drives the magnetic core box 31 to rotate for uniform heating.

[0039] like Figures 1 to 6 As shown, the rotating shaft 19 longitudinally penetrates the furnace cover 13 and extends to the outside of the bottom of the furnace cover 13. The rotating shaft 19 is located at one end of the outside of the bottom of the furnace cover 13 and is fixedly installed with a first gear 14. The bottom of the furnace cover 13 is rotatably installed with a second gear 17 that is meshed with the first gear 14. The bottom of the furnace cover 13 is fixedly installed with a mounting frame 15. The bottom of the mounting frame 15 is fixedly installed with a motor 16. The output end of the motor 16 longitudinally penetrates the mounting frame 15 and is fixedly connected to the rotating shaft of the second gear 17.

[0040] Specifically, the motor 16 drives the second gear 17 to rotate, and the second gear 17 drives the first gear 14 to rotate, so that the rotating shaft 19 rotates.

[0041] like Figures 1 to 6 As shown, a slide groove 32 is provided on the top of the placement plate 25, and slide bars 27 are fixedly installed on the inner walls on both sides of the slide groove 32. The slide groove 32 has built-in sliders 29. The number of the sliders 29 is two groups and they are sequentially located at the inner walls on both sides of the slide groove 32. The sliders 29 are sleeved on the slide bars 27 and are slidably connected with the slide bars 27. A return spring 28 is fixedly installed on the corresponding side wall of the slider 29. A clamping block 30 is fixedly installed on the top of the slider 29, and a magnetic core box 31 is clamped on one side wall of the clamping block 30.

[0042] Specifically, when the core box 31 is placed on the placement plate 25, the user preferably separates the two sets of closed clamps 30, places the core box 31 in the middle of the two sets of clamps 30, and clamps it to prevent the core box 31 from falling when rotating.

[0043] like Figures 1 to 6 As shown, the connection between the vacuum pump 9 and the gas injection pump 10 and the exhaust pipe 7 is located directly below the stop valve 8 on the exhaust pipe 7 .

[0044] like Figures 1 to 6 As shown, a heat-insulating filling cavity 11 is provided in the furnace 2, and electromagnetic heating coils 18 are fixedly installed on the inner wall of the furnace 2. The number of the electromagnetic heating coils 18 is several groups and they are arranged at equal distances.

[0045] In summary: In some embodiments, when it is necessary to perform a core sintering operation, the core to be fired is preferentially placed in the core placing mechanism, and the furnace cover 13 is moved longitudinally by an external lifting machine, so that the furnace cover 13 and the furnace chamber 2 are closed. At this time, the auxiliary operating mechanism is driven to preferentially perform a vacuum treatment, and after the treatment is completed, heating and firing are performed. While firing, the smoke impurities generated by the firing are filtered through the auxiliary operating mechanism. After the firing is completed, after keeping warm for a period of time, the user injects inert gas through the auxiliary operating mechanism for cooling treatment. Before firing, a vacuum treatment is preferentially performed by a vacuum pump. During firing, the fan 4 is driven to cause the fan 4 to extract the smoke impurities generated in the furnace chamber 2. And it is transported to the filter box 6 for filtration treatment. After firing is completed, it is kept warm for a period of time, and then an inert gas is injected through an air injection pump for cooling treatment. When the rotating shaft 19 rotates, the mounting shaft 21 cannot rotate at this time, and the sixth gear 24 and the third gear 20 are meshing. At this time, the sixth gear 24 rotates, causing the fifth gear 23 and the fourth gear 22 to rotate. At this time, the placement plate 25 drives the core box 31 to rotate for uniform heating. When the core box 31 is placed on the placement plate 25, the user preferably separates the two sets of closed clamps 30, and places the core box 31 in the middle of the two sets of clamps 30 for clamping to prevent the core box 31 from falling off during rotation.

[0046] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A magnetic core processing and firing device, characterized in that: The invention comprises a support base (1), a furnace (2) is fixedly mounted on the top of the support base (1), an auxiliary operation mechanism is arranged on a side wall of the furnace (2) at the top of the support base (1), a furnace cover (13) is arranged on the bottom of the support base (1) via an external lifting machine, the furnace cover (13) and the bottom of the furnace (2) are arranged in a closed state, and a sealing ring (12) is arranged at the closed position between the furnace cover (13) and the furnace (2), a rotating shaft (19) is rotatably mounted at the center of the top of the furnace cover (13), and a magnetic core placement mechanism is arranged on the rotating shaft (19); The auxiliary operation mechanism comprises an exhaust pipe (3), a fan (4), an exhaust pipe (5), a filter box (6), an exhaust pipe (7), a stop valve (8), a vacuum pump (9) and an air injection pump (10); the fan (4) is fixedly mounted on the top of the furnace (2); the exhaust end of the fan (4) is connected to the furnace (2) via the exhaust pipe (3); the exhaust end of the fan (4) is fixedly mounted with a filter box (6) via the exhaust pipe (5); the exhaust end of the filter box (6) is connected to the furnace (2) via the exhaust pipe (6); 7) is fixedly connected to the outer wall of the furnace (2), a stop valve (8) is provided on the exhaust pipe (7), a vacuum pump (9) and an air injection pump (10) are fixedly installed on the top of the support seat (1), the output ends of the vacuum pump (9) and the air injection pump (10) are connected to the exhaust pipe (7) through pipelines, and the connecting pipelines of the vacuum pump (9) and the air injection pump (10) are provided with the same stop valve (8) as that on the exhaust pipe (7), and the air injection pump (10) is externally connected to an inert gas tank; The magnetic core placement mechanism comprises a first gear (14), a mounting frame (15), a second gear (17), a motor (16), a third gear (20), a mounting shaft (21), a fourth gear (22), a fifth gear (23), a sixth gear (24), a placement plate (25) and a support rod (26); the support rod (26) is fixedly mounted on the outer wall of the rotating shaft (19); the support rods (26) are in three groups and are arranged in a ring array; the placement plate (25) is rotatably mounted on the top of the support rod (26); a magnetic core box (31) is placed on the top of the placement plate (25); the fourth gear (22) is rotatably mounted on the inner top of the support rod (26); the rotating shaft of the fourth gear (22) longitudinally penetrates the support rod (26) and is fixedly connected to the rotating shaft of the placement plate (25); a fifth gear (23) meshing with the fourth gear (22) is rotatably mounted on a side wall of the support rod (26); a sixth gear (24) is rotatably mounted on the inner wall of the support rod (26); the rotating shaft of the sixth gear (24) transversely penetrates the rotating shaft (19) and is fixedly connected to the rotating shaft of the fifth gear (23); a mounting shaft (21) is rotatably mounted on the top of the furnace cover (13) at the center of the rotating shaft (19); the mounting shaft (21) longitudinally penetrates the furnace cover (13) and is fixedly connected to the mounting frame (15); a third gear (20) meshing with the sixth gear (24) is fixedly mounted on the mounting shaft (21); The rotating shaft (19) longitudinally penetrates the furnace cover (13) and extends to the outside of the bottom of the furnace cover (13); a first gear (14) is fixedly mounted on one end of the rotating shaft (19) located on the outside of the bottom of the furnace cover (13); a second gear (17) meshing with the first gear (14) is rotatably mounted on the bottom of the furnace cover (13); a mounting frame (15) is fixedly mounted on the bottom of the furnace cover (13); a motor (16) is fixedly mounted on the bottom of the mounting frame (15); an output end of the motor (16) longitudinally penetrates the mounting frame (15) and is fixedly connected to the rotating shaft of the second gear (17).

2. A magnetic core processing and firing device according to claim 1, characterized in that: The top of the placement plate (25) is provided with a slide groove (32), and slide rods (27) are fixedly installed on the inner walls on both sides of the slide groove (32). The slide groove (32) has built-in sliders (29). The number of the sliders (29) is two groups and they are sequentially located on the inner walls on both sides of the slide groove (32). The sliders (29) are sleeved on the slide rods (27) and are slidably connected to the slide rods (27). A return spring (28) is fixedly installed on the corresponding side wall of the slider (29). A clamping block (30) is fixedly installed on the top of the slider (29), and a magnetic core box (31) is clamped on one side wall of the clamping block (30).

3. A magnetic core processing and firing device according to claim 1, characterized in that: The connection point between the vacuum pump (9) and the gas injection pump (10) and the exhaust pipe (7) is located directly below the stop valve (8) on the exhaust pipe (7).

4. A magnetic core processing and firing device according to claim 1, characterized in that: A heat-insulating filling cavity (11) is provided in the furnace (2), and electromagnetic heating coils (18) are fixedly mounted on the inner wall of the furnace (2). The electromagnetic heating coils (18) are provided in a plurality of groups and are arranged at equal distances.

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