Sintering and curing equipment for soft magnetic material

Abstract

The utility model discloses sintering and curing equipment for soft magnetic materials, which comprises a furnace body, a furnace mouth is arranged on the front side of the furnace body, a furnace door is arranged at the position of the furnace mouth, a heating piece is arranged in the furnace body, a lock is arranged between the furnace door and the furnace body, a plurality of air inlets communicated with the interior of the furnace body are arranged at the lower end of the furnace body, and a plurality of air outlets are formed in the upper end of the furnace body. The upper end of the furnace body is provided with a plurality of gas outlets communicated with the interior of the furnace body, the structure is simple, so that protective gas can be introduced into the furnace body from the lower end of the furnace body through the plurality of gas inlets, and the protective gas in the furnace body is discharged through the gas outlets above the furnace body, so that the protective atmosphere state in the furnace body is good; and volatile components generated in the furnace body can be timely carried and discharged by the protective gas, so that the heated material can be prevented from being oxidized.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating furnaces, and in particular relates to sintering and solidifying equipment for soft magnetic materials. Background Art

[0002] Soft magnetic materials refer to a type of material that is easy to magnetize and demagnetize. Its coercivity is less than 1000A / m (ampere / meter). It is widely used in electrical equipment and electronic equipment. Traditional soft magnetic materials are iron-silicon alloys (silicon steel sheets) and various soft magnetic ferrites. At present, metal powder alloy soft magnetic materials are usually prepared by powder metallurgy technology, and sintering and curing are an important process link of magnetic materials in powder metallurgy technology. After the metal magnetic powder particles and the binder are stirred and mixed to form a mixture, they are formed into a molded blank under a certain pressure. The molded blank needs to be metallurgically combined at high temperature to connect the powder particles together so that it has a certain strength. This process is called sintering and curing. However, during the sintering process of soft magnetic materials, the iron-based components in them are easily oxidized and affect their quality. Although there are inert gas atmosphere furnaces on the market, although they can create an inert atmosphere in the furnace body, when the soft magnetic material is sintered, the binder and other components in it will be gasified, and eventually gather in the furnace body to increase the concentration, and there is a risk of explosion. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a sintering and curing device which has a simple structure and can perform a sintering and curing process under a circulating protective atmosphere.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is as follows: a sintering and solidification device for soft magnetic materials, comprising a furnace body, a furnace mouth is arranged on the front side of the furnace body, a furnace door is arranged at the furnace mouth, a heating element is arranged in the furnace body, and a lock is arranged between the furnace door and the furnace body, a plurality of air inlets connected to the interior are arranged at the lower end of the furnace body, and a plurality of air outlets connected to the interior are arranged at the upper end of the furnace body.

[0005] The beneficial effects of the above technical solution are: its structure is simple, so that protective gas can be introduced into the furnace body from the lower end of the furnace body through multiple air inlets, and the protective gas in the furnace body is discharged through the air outlet above the furnace body, so that the protective atmosphere in the furnace body is in good condition, and the volatile components generated in the furnace body can also be carried away by the protective gas in time and discharged, so as to avoid oxidation of the heated material.

[0006] In the above technical solution, the air inlet ends of the multiple air inlets merge to form an air inlet interface, and the air outlet ends of the multiple air outlets merge to form an air outlet interface.

[0007] The beneficial effect of the above technical solution is that it makes the arrangement of the furnace air inlet pipeline and the exhaust pipeline simpler.

[0008] In the above technical solution, the plurality of air inlets and the plurality of air outlets are evenly distributed at both ends of the furnace body.

[0009] The beneficial effect of the above technical solution is that the protective gas is evenly distributed in the furnace body, and uneven heat distribution in the furnace body caused by the introduction of the protective gas is avoided.

[0010] In the above technical solution, the heating element is arranged on the inner wall of the furnace body, a condensing element is also embedded in the side wall of the furnace body, and a heat-insulating layer is arranged on the outer wall of the furnace body.

[0011] The beneficial effect of the above technical solution is that after the heating element stops heating, the furnace body and the heated material inside the furnace body can be cooled by the condensing element under the atmosphere of protective gas, which can improve the cooling efficiency and avoid oxidation of the heated material during the cooling process.

[0012] The heating element in the above technical solution is an electric heating belt, which is arranged on the inner walls of three sides of the furnace body.

[0013] The beneficial effect of the above technical solution is that the heat distribution in the furnace body is balanced and the heating effect is good.

[0014] In the above technical solution, the side wall of the furnace body is a cavity structure, and the condensation element is a condensation coil. The condensation element is arranged in the cavity of the three side walls of the furnace body, and the two ends of the condensation element pass through the side wall of the furnace body to form a condensate inlet and a condensate outlet respectively.

[0015] The beneficial effect of the above technical solution is that the condensing coil is arranged in the sandwich structure of the side wall of the furnace body, which has good aesthetics.

[0016] The thermal insulation layer described in the above technical solution is thermal insulation cotton.

[0017] The beneficial effect of the above technical solution is that it has good heat preservation effect.

[0018] The above technical solution also includes a temperature sensor and a controller arranged outside the furnace body. The temperature sensor is arranged on the furnace body and is used to sense the temperature inside the furnace body. The temperature sensor and the heating element are both electrically connected to the controller.

[0019] The beneficial effect of the above technical solution is that the heating temperature in the furnace body can be conveniently set through the controller, and the real-time temperature in the furnace body can be monitored by the temperature sensor.

[0020] The furnace door described in the above technical solution is a water-cooled furnace door.

[0021] The beneficial effect of the above technical solution is that when the furnace body is cooled, the furnace door can also be cooled, thus further improving the cooling effect inside the furnace body.

[0022] The lower end of the furnace body in the above technical solution is also provided with a plurality of supporting legs.

[0023] The beneficial effect of the above technical solution is that the lower end of the furnace body is lifted off the ground, thereby increasing the service life of the furnace body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a vertical view of the sintering and curing equipment of the soft magnetic material according to the embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the distribution of the multiple air inlets and the multiple air outlets in the embodiment of the utility model;

[0026] Figure 3 A cross-sectional view of the furnace body described in the embodiment of the utility model;

[0027] Figure 4 It is a front view of the sintering and solidification equipment of the soft magnetic material described in the embodiment of the utility model.

[0028] In the figure: 1 furnace body; 11 furnace door; 12 air inlet; 121 air inlet interface; 13 air outlet; 131 air outlet interface; 14 supporting foot; 2 heating element; 3 lock; 4 condensation element; 5 insulation layer; 6 temperature sensor; 7 controller. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. According to the following description and claims, the advantages and features of the present invention will be more clearly described. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] like Figure 1As shown, this embodiment provides a sintering and curing device for soft magnetic materials, including a furnace body 1, a furnace mouth is arranged on the front side of the furnace body 1, and a furnace door 11 is arranged at the furnace mouth, a heating element 2 is arranged in the furnace body 1, and a lock 3 is arranged between the furnace door 11 and the furnace body 1, a plurality of air inlets 12 connected with the interior thereof are arranged at the lower end of the furnace body 1, and a plurality of air outlets 13 connected with the interior thereof are arranged at the upper end of the furnace body 1, and the structure is simple, so that protective gas can be introduced into the furnace body from the lower end of the furnace body through the plurality of air inlets, and the protective gas in the furnace body is discharged through the air outlet above the furnace body, so that the protective atmosphere in the furnace body is in a good state, and the volatile components generated in the furnace body can also be carried and discharged in time by the protective gas, so that oxidation of the heated material can be avoided.

[0031] The protective gas may be an inert gas, nitrogen or carbon dioxide gas.

[0032] In the above technical solution, the air inlet ends of the multiple air inlets 12 merge to form an air inlet interface 121, and the air outlet ends of the multiple air outlets 13 merge to form an air outlet interface 131, which makes the arrangement of the furnace air inlet pipeline and the exhaust pipeline simpler.

[0033] like Figure 2 As shown, in the above technical solution, the multiple air inlets 12 and the multiple air outlets 13 are evenly distributed at both ends of the furnace body 1, so that the protective gas is evenly distributed in the furnace body and the uneven heat distribution in the furnace body caused by the introduction of the protective gas is avoided. In this embodiment, the interior of the furnace body is a square chamber. At this time, multiple air inlets can be set, and multiple air inlets can be set at the middle and edge of the lower end of the furnace body, and the air outlet can be set or multiple, and multiple air outlets are set at the edge of the upper end of the furnace body. Preferably, five air inlets are set, and four air outlets are set, wherein an air inlet is set in the middle of the lower end of the furnace body and the four corners, and an air outlet is set at the four corners of the upper end of the furnace body. At this time, the five air inlets merge into one air inlet interface, and the four air outlets merge into one air outlet interface, wherein, Figure 2 The dotted line in the middle indicates the air inlet and outlet at the two corners aligned up and down. The advantages of this arrangement are: the air intake comes in from the four sides and the middle of the bottom, and the incoming cold gas can diffuse quickly, so that the atmosphere in the furnace is evenly distributed, while ensuring the temperature uniformity. In addition, since the original temperature in the furnace is high, the atmosphere purity is low, and the hot air is relatively light, the air intake from the four corners at the bottom and the middle can drive the original atmosphere in the furnace from various areas and squeeze it to the top outlet. Through repeated replacement of intake and exhaust, the atmosphere purity in the furnace is higher.

[0034] like Figure 3As shown, in the above technical solution, the heating element 2 is arranged on the inner wall of the furnace body 1, and a condensing element 4 is also embedded in the side wall of the furnace body 1. An insulating layer 5 is arranged on the outer wall of the furnace body 1. In this way, after the heating element stops heating, the condensing element can cool the furnace body and the heated material in the furnace body under the atmosphere of protective gas, which can improve the cooling efficiency and prevent the heated material from being oxidized during the cooling process.

[0035] The heating element 2 described in the above technical solution is an electric heating belt, which is coiled on the inner walls of the three sides of the furnace body 1. The heating belt is multi-stage heating control (i.e., staged heating, such as keeping warm for 10 minutes after each heating of 50°C or 100°C, and then continuing to heat up), so that the heat distribution in the furnace body is balanced and the heating effect is good.

[0036] In the above technical solution, the side wall of the furnace body 1 is a sandwich structure, and the condensation element 4 is a condensation coil, and the condensation element 4 is arranged in the sandwich structure of the three side walls of the furnace body 1 (because a furnace mouth is arranged on the front side of the furnace body, the heating element, the condensation element and the insulation layer are mainly arranged on the left and right sides and the rear side walls of the furnace body), and the two ends of the condensation element 4 pass through the side wall of the furnace body 1 to form a condensate inlet and a condensate outlet respectively, so that the condensation coil is arranged in the sandwich structure of the side wall of the furnace body, and its aesthetics is good.

[0037] The thermal insulation layer 5 described in the above technical solution is thermal insulation cotton, which has good thermal insulation effect.

[0038] The above technical solution also includes a temperature sensor 6 and a controller 7 arranged outside the furnace body 1. The temperature sensor 6 is arranged on the furnace body 1, and is used to sense the temperature inside the furnace body 1. The temperature sensor 6 and the heating element 2 are electrically connected to the controller 7, so that the heating temperature inside the furnace body can be conveniently set through the controller, and the temperature sensor can monitor the real-time temperature inside the furnace body.

[0039] The furnace door 11 described in the above technical solution is a water-cooled furnace door, so that when the furnace body is cooled, the furnace door can also be cooled, thereby further improving the cooling effect inside the furnace body. The structure of the furnace door can be the structure disclosed in document number CN206073127U "A Water-Cooled Furnace Door".

[0040] like Figure 4 As shown, the lower end of the furnace body 1 in the above technical solution is also provided with a plurality of supporting legs 14, so that the lower end of the furnace body is off the ground, which can increase the service life of the furnace body.

[0041] In this embodiment, four supporting feet are provided, one can be provided at each corner of the lower end of the furnace body, wherein the supporting feet can be leveling feet, and of course, universal wheels can be directly used instead (and at least one of the multiple universal wheels is a brakeable universal wheel).

[0042] The controller described in this embodiment has a human-computer interaction module (such as a display screen and setting buttons, etc., which belong to the current technology and are not described here in detail. The specific controller can be an ARM series single-chip microcomputer).

[0043] The furnace body in this embodiment can be improved on the basis of the existing muffle furnace, wherein the lock belongs to the existing technology (and the lock can also be used as the door handle of the furnace door).

[0044] Of course, the top wall, bottom wall and outer side of the furnace door of the furnace body in this embodiment can be provided with an insulation layer for insulation treatment, and the location where the controller is set also needs to be insulated to prevent the normal operation of the controller from being affected by the high temperature in the furnace body.

[0045] The sintering and curing equipment provided in this embodiment can be used for sintering and curing soft magnetic materials, and the sintering and curing of the soft magnetic materials in the furnace body and the subsequent cooling process can be carried out under the atmosphere of protective gas, thereby preventing the iron-based components in the soft magnetic materials from being oxidized.

[0046] The sintering and curing equipment provided in this embodiment is to avoid oxidation of the surface of metal magnetic materials. Generally, the formed blank is placed in a furnace body, the furnace body is first heated, and the preheated protective gas (generally nitrogen and argon) is continuously introduced into the furnace body to exhaust the air in the furnace body, so that the furnace body is under protective atmosphere conditions. In addition, during sintering and curing, in order to make the temperature on the metal cross section uniform and the metallurgical bonding complete, it is necessary to make the atmosphere inside the furnace body fluctuate less and the temperature tend to be uniform. During the sintering process, the protective gas can continue to be introduced into the furnace body to discharge the original protective gas (carrying organic gasified components) in the furnace body.

[0047] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. A sintering and solidifying device for soft magnetic materials, comprising a furnace body (1), a furnace opening being arranged at the front side of the furnace body (1), a furnace door (11) being arranged at the furnace opening, a heating element (2) being arranged inside the furnace body (1), and a lock (3) being arranged between the furnace door (11) and the furnace body (1), characterized in that: The lower end of the furnace body (1) is provided with a plurality of air inlets (12) communicating with the interior thereof, and the upper end of the furnace body (1) is provided with a plurality of air outlets (13) communicating with the interior thereof.

2. The sintering and curing equipment of soft magnetic materials according to claim 1, characterized in that: The air inlet ends of the plurality of air inlets (12) merge to form an air inlet interface (121), and the air outlet ends of the plurality of air outlets (13) merge to form an air outlet interface (131).

3. The sintering and curing equipment of soft magnetic materials according to claim 1, characterized in that: The plurality of air inlets (12) and the plurality of air outlets (13) are evenly distributed at both ends of the furnace body (1).

4. The sintering and curing equipment of soft magnetic materials according to claim 1, characterized in that: The heating element (2) is arranged on the inner wall of the furnace body (1), a condensing element (4) is also embedded in the side wall of the furnace body (1), and a heat-insulating layer (5) is arranged on the outer wall of the furnace body (1).

5. The sintering and curing equipment for soft magnetic materials according to claim 4, characterized in that: The heating element (2) is an electric heating belt, which is arranged on the inner side walls of three sides of the furnace body (1).

6. The sintering and curing equipment of soft magnetic materials according to claim 4, characterized in that: The side wall of the furnace body (1) is a cavity structure, and the condensation element (4) is a condensation coil. The condensation element (4) is arranged in the cavity of the three side walls of the furnace body (1), and the two ends of the condensation element (4) extend out of the side wall of the furnace body (1) to respectively form a condensate inlet and a condensate outlet.

7. The sintering and solidification equipment of soft magnetic materials according to claim 4, characterized in that: The thermal insulation layer (5) is thermal insulation cotton.

8. The sintering and solidification equipment for soft magnetic materials according to any one of claims 1 to 7, characterized in that: It also includes a temperature sensor (6) and a controller (7) arranged outside the furnace body (1); the temperature sensor (6) is arranged on the furnace body (1) and is used to sense the temperature inside the furnace body (1); the temperature sensor (6) and the heating element (2) are both electrically connected to the controller (7).

9. The sintering and solidification equipment for soft magnetic materials according to any one of claims 1 to 7, characterized in that: The furnace door (11) is a water-cooled furnace door.

10. The sintering and solidification equipment for soft magnetic materials according to any one of claims 1 to 7, characterized in that: The lower end of the furnace body (1) is also provided with a plurality of supporting legs (14).

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