Soft magnetic shielding material manufacturing process and production line thereof

Abstract

The invention discloses a soft magnetic shielding material manufacturing process and a production line thereof.In the soft magnetic shielding material manufacturing process, firstly, an iron-based material is conveyed into a baking oven, then, the baking oven is heated for the first time so that the temperature of the baking oven can be increased to the first temperature, then, the baking oven is heated for the second time so that the temperature of the baking oven can be increased to the first temperature, and the temperature of the baking oven can be increased to the second temperature; the temperature of the baking furnace is raised from the first temperature to the second temperature, then the temperature of the baking furnace is raised from the second temperature to the third temperature for the third time, nanocrystals are generated in the ferromagnetic coiled material to be converted into the soft magnetic shielding material, and then the soft magnetic shielding material is output from the baking furnace and stored. The iron-based material is placed in the baking furnace to be subjected to three-stage baking, so that the iron-based material forms the soft magnetic shielding material, the magnetic permeability of the produced soft magnetic shielding material can reach 40000 H / m under the charging frequency of 10 KHz, and the magnetic field damage of the soft magnetic shielding material can be lower than 6000.

Description

Technical Field

[0001] The present invention relates to the technical field of manufacturing processes for soft magnetic shielding materials, and particularly to a manufacturing process for soft magnetic shielding materials and its production line. Background Art

[0002] In order to meet the magnetic field shielding requirements of various precision components in consumer electronics, restricted by the requirements of product size and thickness, the popularity of soft magnetic shielding materials in the 3C consumer electronics industry is increasing. Among these precision components, the rapid response of the autofocus function of mobile phone cameras directly affects the actual experience of consumers. Therefore, mobile phone cameras have strong anti-interference requirements for magnetic fields to ensure that the autofocus of the mobile phone camera motor will not be sluggish or even unable to achieve near-focus due to long-term magnetic field interference during use.

[0003] For the soft magnetic shielding materials in the related art, at a charging frequency of 10KHz, its permeability is often difficult to reach 40000H / m, and its magnetic field loss requirement is difficult to be lower than 6000, resulting in the existing soft magnetic shielding materials being difficult to meet the usage requirements of current 3C products. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art. In the first aspect of the present invention, a manufacturing process for soft magnetic shielding materials is provided. The soft magnetic shielding materials manufactured by using the manufacturing process of this embodiment can reach a permeability of 40000H / m at a charging frequency of 10KHz, and its magnetic field damage can be lower than 6000. In the second aspect of the present invention, a production line for soft magnetic shielding materials is also provided.

[0005] According to the manufacturing process for soft magnetic shielding materials provided by the first aspect embodiment of the present invention, it includes the following steps:

[0006] Transport the iron-based material into the baking furnace;

[0007] Perform the first temperature increase on the baking furnace to raise the temperature of the baking furnace to the first temperature, and the first temperature is 390°C to 400°C;

[0008] Perform the second temperature increase on the baking furnace to raise the temperature of the baking furnace from the first temperature to the second temperature, and the second temperature is 485°C to 495°C;

[0009] Perform the third temperature increase on the baking furnace to raise the temperature of the baking furnace from the second temperature to the third temperature, and generate nanocrystals inside the ferromagnetic coil to be transformed into soft magnetic shielding materials. The third temperature is 575°C to 585°C;

[0010] Output the soft magnetic shielding materials from the baking furnace and store them.

[0011] The manufacturing process of the soft magnetic shielding material described in the present invention has at least the following beneficial effects: In the manufacturing process of the soft magnetic shielding material of the present application, first, the iron-based material is conveyed into the baking furnace, and then, the baking furnace is heated for the first time to raise the temperature of the baking furnace to the first temperature, the first temperature is 390°C to 400°C. Next, the baking furnace is heated for the second time to raise the temperature of the baking furnace from the first temperature to the second temperature, the second temperature is 485°C to 495°C. Immediately afterwards, the baking furnace is heated for the third time to raise the temperature of the baking furnace from the second temperature to the third temperature, and nano-crystals are generated inside the ferromagnetic coil to be transformed into a soft magnetic shielding material, the third temperature is 575°C to 585°C. Then, the soft magnetic shielding material is output from the baking furnace and stored. By placing the iron-based material in the baking furnace for three-stage baking, the iron-based material is formed into a soft magnetic shielding material, and the produced soft magnetic shielding material has a permeability of up to 40,000 H / m at a charging frequency of 10 KHz, and its magnetic field damage is less than 6,000.

[0012] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, the first heating of the baking furnace includes the following steps:

[0013] The baking furnace is uniformly heated from 200°C to the first temperature within 55 minutes;

[0014] Keep the first temperature in the baking furnace for 30 minutes.

[0015] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, the second heating of the baking furnace includes the following steps:

[0016] The baking furnace is uniformly heated from the first temperature to the second temperature within 60 minutes;

[0017] Keep the second temperature in the baking furnace for 60 minutes.

[0018] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, the third heating of the baking furnace includes the following steps:

[0019] The baking furnace is uniformly heated from the second temperature to the third temperature within 60 minutes;

[0020] Keep the third temperature in the baking furnace for 150 minutes.

[0021] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, it further includes the following steps:

[0022] Fill the baking furnace with nitrogen before the iron-based material is conveyed into the baking furnace.

[0023] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, before the iron-based material is transported into the baking furnace, the baking furnace is filled with nitrogen, including the following steps:

[0024] Vacuum the baking furnace;

[0025] Fill the baking furnace with nitrogen.

[0026] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, transport the iron-based material into the baking furnace, including the following steps:

[0027] Wind the iron-based material into a coil;

[0028] Transport the coil into the baking furnace.

[0029] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, the length of the coil is 200m.

[0030] According to the manufacturing process of the soft magnetic shielding material described in the first aspect embodiment of the present invention, output and store the soft magnetic shielding material from the baking furnace, including the following steps:

[0031] Unroll and laminate multiple coils to form a composite film;

[0032] Wind the composite film.

[0033] According to the soft magnetic shielding material production line provided by the second aspect embodiment of the present invention, it is used to implement the manufacturing process of the soft magnetic shielding material provided by the first aspect embodiment of the present invention.

[0034] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0035] The present invention will be further described below in conjunction with the drawings and embodiments;

[0036] Figure 1 It is a flowchart of the manufacturing process of the soft magnetic shielding material according to an embodiment of the present invention;

[0037] Figure 2 It is a flowchart of the first temperature rise of the baking furnace according to an embodiment of the present invention;

[0038] Figure 3 It is a flowchart of the second temperature rise of the baking furnace according to an embodiment of the present invention;

[0039] Figure 4 It is a flowchart of the third temperature rise of the baking furnace according to an embodiment of the present invention;

[0040] Figure 5 Flow chart of filling the baking furnace with nitrogen before the iron-based material is transported into the baking furnace according to an embodiment of the present invention;

[0041] Figure 6 Flow chart of transporting the iron-based material into the baking furnace according to an embodiment of the present invention;

[0042] Figure 7 Flow chart of outputting and storing the soft magnetic shielding material from the baking furnace according to an embodiment of the present invention;

[0043] Figure 8 Schematic diagram of the temperature change in the baking furnace over time according to an embodiment of the present invention. Detailed implementation manners

[0044] This part will describe the specific embodiments of the present invention in detail. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation to the protection scope of the present invention.

[0045] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0046] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0047] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0048] Next, refer to Figures 1 to 8 to elaborate in detail on the manufacturing process of the soft magnetic shielding material in the first aspect of the present application.

[0049] Refer to Figure 1 and Figure 8, The manufacturing process of the soft magnetic shielding material according to the embodiments of the present invention includes, but is not limited to, the following steps:

[0050] Step S100: Convey the iron-based material into the baking furnace;

[0051] Step S200: Perform the first temperature increase on the baking furnace so that the temperature of the baking furnace rises to the first temperature, and the first temperature is 390°C to 400°C;

[0052] It can be understood that by raising the temperature of the baking furnace to 390°C to 400°C, the internal stress of the iron-based material itself can be reduced, and the brittleness and uniformity of the iron-based material itself can be improved, so as to facilitate the uniform formation of nanocrystalline crystals inside the iron-based material subsequently.

[0053] Step S300: Perform the second temperature increase on the baking furnace so that the temperature of the baking furnace rises from the first temperature to the second temperature, and the second temperature is 485°C to 495°C;

[0054] It can be understood that by raising the temperature of the baking furnace to 485°C to 495°C, the crystal structure inside the iron-based material can be refined, and the microstructure inside the iron-based material can be changed, so as to facilitate the formation of nanocrystalline crystals inside the iron-based material subsequently.

[0055] Step S400: Perform the third temperature increase on the baking furnace so that the temperature of the baking furnace rises from the second temperature to the third temperature, and generate nanocrystals inside the ferromagnetic coil to be transformed into a soft magnetic shielding material, and the third temperature is 575°C to 585°C;

[0056] It can be understood that by raising the temperature of the baking furnace to 575°C to 585°C, nanocrystalline crystals can be generated inside the iron-based material, and the magnetic properties of the iron-based material can be excited, so that the iron-based material is transformed into a soft magnetic shielding material.

[0057] Step S500: Output the soft magnetic shielding material from the baking furnace and store it.

[0058] It can be understood that in the manufacturing process of the soft magnetic shielding material of the present application, the iron-based material is first conveyed into the baking furnace, and then, the baking furnace is heated for the first time to raise the temperature of the baking furnace to the first temperature, the first temperature is 390°C to 400°C. Then, the baking furnace is heated for the second time to raise the temperature of the baking furnace from the first temperature to the second temperature, the second temperature is 485°C to 495°C. Immediately afterwards, the baking furnace is heated for the third time to raise the temperature of the baking furnace from the second temperature to the third temperature, and nano-crystals are generated inside the ferromagnetic coil to be transformed into a soft magnetic shielding material, the third temperature is 575°C to 585°C. Then, the soft magnetic shielding material is output from the baking furnace and stored. By placing the iron-based material in the baking furnace for three-stage baking, the iron-based material is formed into a soft magnetic shielding material, and the produced soft magnetic shielding material has a permeability of 40000 H / m at a charging frequency of 10 KHz, and its magnetic field damage is less than 6000.

[0059] In some embodiments of the present invention, referring to Figure 2 and Figure 8 , in step S200, it includes but is not limited to the following steps:

[0060] Step S210: Uniformly heat the baking furnace from 200°C to the first temperature within 55 minutes;

[0061] Step S220: Keep the first temperature in the baking furnace for 30 minutes.

[0062] It can be understood that uniformly heating the baking furnace from 200°C to the first temperature within 55 minutes can enable the iron-based material to gradually adapt to the first temperature; keeping the first temperature in the baking furnace for 30 minutes can enable the internal stress of the iron-based material to be eliminated more fully, and enable the iron-based material to have better brittleness and uniformity.

[0063] In some embodiments of the present invention, referring to Figure 3 and Figure 8 , in step S300, it includes but is not limited to the following steps:

[0064] Step S310: Uniformly heat the baking furnace from the first temperature to the second temperature within 60 minutes;

[0065] Step S320: Keep the second temperature in the baking furnace for 60 minutes.

[0066] It can be understood that uniformly heating the baking furnace from the first temperature to the second temperature within 60 minutes can enable the iron-based material to gradually adapt to the second temperature; and keeping the second temperature in the baking furnace for 60 minutes can enable the crystal structure inside the iron-based material to be fully refined to change the microstructure of the iron-based material.

[0067] In some embodiments of the present invention, referring to Figure 4 and Figure 8 , in step S400, it includes but is not limited to the following steps:

[0068] Step S410: Uniformly heat the baking furnace from the second temperature to the third temperature within 60 minutes;

[0069] Step S420: Keep the third temperature in the baking furnace for 150 minutes.

[0070] It can be understood that uniformly heating the baking furnace from the second temperature to the third temperature within 60 minutes can enable the iron-based material to gradually adapt to the third temperature; and keeping the baking furnace at the third temperature for 150 minutes can, on the one hand, enable the full formation of nanocrystalline crystals inside the iron-based material so that the iron-based material is transformed into a soft magnetic shielding material, and on the other hand, can avoid the soft magnetic shielding material staying at the third temperature for too long, thus preventing the generated nanocrystalline crystals from aging.

[0071] In some embodiments of the present invention, referring to Figure 1 , the manufacturing process of the soft magnetic shielding material further includes but is not limited to the following steps:

[0072] Step S600: Fill the baking furnace with nitrogen before transporting the iron-based material into the baking furnace.

[0073] It can be understood that by filling the baking furnace with nitrogen, the iron-based material can be in a state of being wrapped by nitrogen throughout the process of being transformed into a soft magnetic shielding material in the baking furnace. Filling the baking furnace with nitrogen can, on the basis of ensuring the uniform production of nanocrystalline crystals inside the iron-based material, also enable the soft magnetic shielding material formed by the transformation of the iron-based material to have a smoother appearance and reduce the probability of the surface of the soft magnetic shielding material turning yellow.

[0074] In a further embodiment of the present invention, referring to Figure 5 , in step S600, it includes but is not limited to the following steps:

[0075] Step S610: Evacuate the baking furnace;

[0076] Step S620: Fill the baking furnace with nitrogen.

[0077] It can be understood that evacuating the baking furnace before filling it with nitrogen can fully remove other gases in the baking furnace to reduce the interference of other gases except nitrogen during the process of the iron-based material being transformed into a soft magnetic shielding material, and ensure the smooth progress of the transformation of the iron-based material into a soft magnetic shielding material.

[0078] In some embodiments of the present invention, referring to Figure 6, in step S100, it includes but is not limited to the following steps:

[0079] Step S110: Wind the iron-based material into a coil.

[0080] Step S120: Transport the coil to the baking furnace.

[0081] It can be understood that before transporting the iron-based material into the baking furnace, by winding the iron-based material into a coil, the dimensions of the iron-based material in all directions can be made relatively uniform, so that more iron-based materials can be accommodated in the baking furnace at one time, thereby improving the processing efficiency.

[0082] In a further embodiment of the present invention, the length of the coil is 200m.

[0083] It should be noted that if the length of the coil is too long, the overall heat uniformity of the coil will be poor, which will affect the formation of nanocrystalline crystals inside the coil; if the length of the coil is too short, the outside of the coil will be overheated, resulting in the aging of the nanocrystalline crystals formed on the outside of the coil.

[0084] It can be understood that by setting the length of the coil to 200m, on the premise of ensuring the overall uniform heating of the coil, the probability of overheating on the outside of the coil can be reduced, and thus the probability of aging of the nanocrystalline crystals formed on the outside of the coil can be reduced.

[0085] In some embodiments of the present invention, refer to Figure 7 , in step S500, it includes but is not limited to the following steps:

[0086] Step S510: Unroll and laminate multiple coils to form a composite film material.

[0087] Step S520: Wind the composite film material.

[0088] It can be understood that by unrolling and laminating multiple coils into a composite film material and then winding the composite film material again, it is convenient for the storage of the soft magnetic shielding material.

[0089] In a further embodiment of the present invention, after multiple coils are unrolled, they can be laminated with double-sided tape to make the lamination between adjacent soft magnetic shielding materials more firm.

[0090] According to the soft magnetic shielding material production line provided by the second aspect embodiment of the present invention, it is used to implement the soft magnetic shielding material manufacturing process provided by the first aspect embodiment of the present invention.

[0091] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A manufacturing process for a soft magnetic shielding material, characterized in that, It includes the following steps: Transport the iron-based material into the baking furnace; Perform the first temperature increase on the baking furnace to raise the temperature of the baking furnace to the first temperature, and the first temperature is 390°C to 400°C; Perform the second temperature increase on the baking furnace to raise the temperature of the baking furnace from the first temperature to the second temperature, and the second temperature is 485°C to 495°C; Perform the third temperature increase on the baking furnace to raise the temperature of the baking furnace from the second temperature to the third temperature, and generate nanocrystals inside the ferromagnetic coil to be transformed into a soft magnetic shielding material, and the third temperature is 575°C to 585°C; Output the soft magnetic shielding material from the baking furnace and store it.

2. The manufacturing process of a soft magnetic shielding material according to claim 1, characterized in that, The performing the first temperature increase on the baking furnace includes the following steps: Uniformly raise the temperature of the baking furnace from 200°C to the first temperature within 55 minutes; Keep the first temperature in the baking furnace for 30 minutes.

3. The manufacturing process of a soft magnetic shielding material according to claim 1, characterized in that The performing the second temperature increase on the baking furnace includes the following steps: Uniformly raise the temperature of the baking furnace from the first temperature to the second temperature within 60 minutes; Keep the second temperature in the baking furnace for 60 minutes.

4. A manufacturing process for a soft magnetic shielding material according to claim 1, characterized in that, The performing the third temperature increase on the baking furnace includes the following steps: Uniformly raise the temperature of the baking furnace from the second temperature to the third temperature within 60 minutes; Keep the third temperature in the baking furnace for 150 minutes.

5. A manufacturing process of a soft magnetic shielding material according to claim 1, characterized in that, It further includes the following steps: Fill the baking furnace with nitrogen before transporting the iron-based material into the baking furnace.

6. The manufacturing process of a soft magnetic shielding material according to claim 5, characterized in that, The filling the baking furnace with nitrogen before transporting the iron-based material into the baking furnace includes the following steps: Vacuum the baking furnace; Fill the baking furnace with nitrogen.

7. The manufacturing process of a soft magnetic shielding material according to claim 1, characterized in that, The transporting the iron-based material into the baking furnace includes the following steps: Wind the iron-based material into a coil; Transport the coil into the baking furnace.

8. A manufacturing process of a soft magnetic shielding material according to claim 7, characterized in that, The length of the coil wound is 200m.

9. The manufacturing process of a soft magnetic shielding material according to claim 7, characterized in that, The outputting the soft magnetic shielding material from the baking furnace and storing it includes the following steps: Unroll and laminate multiple coils to form a composite film; Wind the composite film.

10. A production line for soft magnetic shielding materials, characterized in that, It is used to implement the manufacturing process of the soft magnetic shielding material according to any one of claims 1 to 9.

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