Ferrite core sintering device

Abstract

The utility model discloses a ferrite magnetic core sintering device, which relates to the field of industrial part processing, and comprises a device main body, a forming groove is arranged in the device main body, a cover plate is arranged at the top of the forming groove, the cover plate is clamped with the forming groove, a clamping block is arranged in the device main body in a sliding manner, and the clamping block is clamped with the forming groove. The side, close to the forming groove, of the clamping block is provided with an ejection block matched with the forming groove, and the end, away from the interior of the forming groove, of the clamping block is provided with an extrusion air bag. The device is communicated with an external air source through the connector, air pressure in the forming groove is regulated and controlled in real time through the connecting valve, and the material sintering shrinkage amount is compensated in cooperation with elastic deformation of the extrusion air bag.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial parts processing field, concretely is a ferrite core sintering device. BACKGROUND

[0002] As the core basic material of electronic information industry, ferrite core is widely used in the manufacture of key components such as transformer, inductor and filter. With the rapid development of new energy vehicles, 5G communication and smart grid, the performance requirements of magnetic core materials are continuously improved. As a key link of magnetic core preparation, the equipment efficiency of traditional sintering process directly affects the density uniformity, permeability stability and production cost of products. The common problems faced by the current industry include: insufficient material forming pressure control accuracy in high temperature sintering process, low efficiency of furnace gas pressure regulation, long downtime caused by complex equipment maintenance, etc., which restricts the batch production of high-end magnetic cores.

[0003] The existing ferrite core sintering device mainly adopts box furnace or vacuum sintering furnace structure, which applies static pressure to the material through mechanical pressing plate, and realizes the sintering process combined with resistance wire heating. Such equipment usually includes fixed cavity mold, independent heating system and basic gas path control module. Its core working principle is to place the pre-pressed magnetic core blank in a sealed furnace, maintain the set temperature through the PID temperature control system, and rely on gravity or simple hydraulic device to keep the material under pressure. However, such equipment has significant limitations: low integration of mold cavity and heating area leads to insufficient heat transfer efficiency, gas pressure regulation depends on external independent gas source and cannot respond to process requirements in real time, and the material limiting structure is mostly rigid design, which cannot meet the flexible production needs of different specifications of products.

[0004] Traditional sintering process mainly includes the following processes: first, mix ferrite powder with binder and pre-press into blank, then place the blank in high-temperature resistant mold; then move the mold into the sintering furnace cavity by mechanical arm, start the heating system to raise the temperature to 1200-1400℃ and keep it for several hours; in this process, the mold is subjected to constant pressure (usually 5-10MPa) through the pre-set hydraulic system, and nitrogen or argon is introduced to maintain inert atmosphere; after sintering, the furnace is cooled to room temperature, and the finished product is taken out for post-processing. The key problem of this process is that the pressure application method is single and cannot be dynamically adjusted according to the sintering process; the gas pressure in the furnace fluctuates greatly, affecting the material crystallization process; the mold disassembly needs manual operation, resulting in poor production continuity.

[0005] The existing sintering device has significant deficiencies in gas pressure control and material forming cooperation: firstly, the traditional gas path system adopts a valve opening degree manual adjustment mode, cannot compensate the pressure change caused by material shrinkage in the sintering process in real time, and is prone to causing the internal porosity of the magnetic core to exceed the standard; and secondly, the rigid limiting structure is prone to thermal deformation in a high-temperature environment, resulting in poor product size consistency. Content of the utility model

[0006] Therefore, the utility model aims at providing a ferrite magnetic core sintering device to solve the technical problems that the existing sintering device has significant deficiencies in gas pressure control and material forming cooperation: firstly, the traditional gas path system adopts a valve opening degree manual adjustment mode, cannot compensate the pressure change caused by material shrinkage in the sintering process in real time, and is prone to causing the internal porosity of the magnetic core to exceed the standard; and secondly, the rigid limiting structure is prone to thermal deformation in a high-temperature environment, resulting in poor product size consistency.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a ferrite magnetic core sintering device, comprising a device main body, a forming groove is arranged in the device main body, a cover plate is arranged at the top of the forming groove, the cover plate is clamped with the forming groove, a clamping block is slidably arranged in the device main body, a top block is arranged on the side of the clamping block close to the forming groove and matched with the forming groove, and an extrusion air bag is arranged at the end of the clamping block away from the forming groove.

[0008] Through the extrusion of the extrusion air bag by an external object, the gas in the air bag enters the device for pressurization while being buffered.

[0009] The utility model is further provided with a base plate clamped on the top of the device main body, an upper top plate arranged on the top of the base plate, and a clamping block arranged on the device main body and matched with the upper top plate.

[0010] Through the cooperation of the base plate and the upper base plate, the sealing property of the device main body is ensured, and the material is conveniently fed into the device.

[0011] The utility model is further provided with a plurality of heating elements arranged in the device main body and matched with the forming groove.

[0012] Through the heating elements, the material in the forming groove is heated.

[0013] The utility model is further provided with a plurality of connectors arranged at the bottom of the forming groove, a connecting pipeline arranged at the top of the connector, the connecting pipeline being in communication with the inside of the forming groove, and a connecting valve arranged at the bottom of the connector.

[0014] Through the connecting valve, the external pressure control equipment is connected, and the internal pressure of the device is assisted.

[0015] The utility model further sets up, the card block is provided with the gas outlet and device main body inner intercommunication.

[0016] Through adopting above technical scheme, the main body inner gas pressure is controlled.

[0017] Summarized above, the utility model mainly has following beneficial effect:

[0018] 1, the utility model discloses a connector and external gas source intercommunication, utilizes the connecting valve real-time regulation and control the air pressure in the forming groove, cooperates the elastic deformation compensation material sintering shrinkage of extruded air bag;

[0019] 2, the utility model discloses a top block and cover plate adopt slidable clamping structure, combine the gradient temperature control field of forming groove bottom heating element, guarantee the cavity tightness through the gasket and clamping block. DRAWINGS

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is the internal structure schematic diagram of the utility model;

[0022] Figure 3 It is the internal structure schematic diagram of the forming groove of the utility model;

[0023] Figure 4 It is the internal structure section view of the utility model.

[0024] In the drawing: 1, device main body;2, upper top plate;3, gasket;4, extruded air bag;5, card block;6, connector;7, heating element;8, connecting pipeline;9, forming groove;10, top block;11, cover plate;12, connecting valve;13, gas outlet;14, buffer spring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are used only for explaining the utility model, and cannot be understood as limiting the utility model.

[0026] The embodiments of the utility model will be described below according to the whole structure of the utility model.

[0027] A ferrite core sintering device, like Figures 1-4As shown, including device body 1, the device body 1 is provided with a forming groove 9, the top of the forming groove 9 is provided with a cover plate 11, the cover plate 11 is clamped with the forming groove 9, the material in the forming groove 9 is limited by the cover plate 11, the clamping block 5 is slidably arranged in the device body 1, the side of the clamping block 5 close to the forming groove 9 is provided with a top block 10 and the forming groove 9 is matched, one end of the clamping block 5 away from the forming groove 9 is provided with an extrusion air bag 4, in actual use, the material in the forming groove 9 is limited by the cooperation of the top block 10 and the cover plate 11, which assists the material forming, the bottom of the forming groove 9 is provided with a plurality of connectors 6, the top of the connector 6 is provided with a connecting pipeline 8, the connecting pipeline 8 is communicated with the inside of the forming groove 9, the bottom of the connector 6 is provided with a connecting valve 12, the external element is connected through the connecting valve 12, the air pressure in the connecting forming groove 9 is controlled through the external element, thereby assisting the material forming.

[0028] The device body 1 is clamped with a pad plate 3, the top of the pad plate 3 is provided with an upper top plate 2, the device body 1 is matched with the upper top plate 2 and is provided with a clamping block 15, the sealing of the inside of the device body 1 is ensured by the cooperation of the pad plate 3 and the upper top plate 2, and the upper top plate 2 and the pad plate 3 are controlled by the clamping block 15, thereby processing the device, facilitating the cleaning operation of the operator.

[0029] The device body 1 is matched with the forming groove 9 and is provided with a plurality of heating elements 7, the forming groove 9 is heated by the heating element 7, and the stability of the formed material is ensured.

[0030] The clamping block 5 is provided with an air outlet 13 communicated with the device body 1, and the gas will enter the device body 1 when the extrusion air bag 4 is extruded.

[0031] Meanwhile, on the basis of the above structure, the top block is sliding, thereby ensuring that the inside is large when the pressure is large, the device provides a certain buffer space, thereby ensuring the sintering effect.

[0032] Although the embodiments of the present application have been shown and described, the specific embodiments are only an explanation of the present application, and are not a limitation of the application, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and those skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification without departing from the principles and purposes of the present application, but as long as it is within the scope of the claims of the present application, it is protected by the patent law.

Claims

1. A ferrite core sintering apparatus comprising an apparatus main body (1), characterized by: The device body (1) is provided with a forming groove (9), the top of the forming groove (9) is provided with a cover plate (11), the cover plate (11) is clamped with the forming groove (9), the device body (1) is provided with a clamping block (5) slidingly, the side of the clamping block (5) close to the forming groove (9) is provided with a top block (10) matched with the forming groove (9), the end of the clamping block (5) away from the forming groove (9) is provided with an extrusion air bag (4).

2. The ferrite core sintering device according to claim 1, wherein: The device body (1) is clamped with a backing plate (3) on the top, the top of the backing plate (3) is provided with an upper top plate (2), the device body (1) is provided with a clamping block (15) matched with the upper top plate (2).

3. The ferrite core sintering device according to claim 1, wherein: The device body (1) is provided with a plurality of heating elements (7) matched with the forming groove (9).

4. The ferrite core sintering apparatus according to claim 1, wherein: The bottom of the forming groove (9) is provided with a plurality of connectors (6), the top of the connector (6) is provided with a connecting pipeline (8), the connecting pipeline (8) is communicated with the inside of the forming groove (9), the bottom of the connector (6) is provided with a connecting valve (12).

5. The ferrite core sintering apparatus according to claim 1, wherein: The clamping block (5) is provided with an air outlet (13) communicated with the device body (1).

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