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Ferrite forming body, ferrite grinding body, ferrite core, manufacture method, forming method and device, grinding method and device

A ferrite and molded body technology, applied in the manufacture of inductors/transformers/magnets, manufacturing tools, forming indenters, etc., can solve the problems of no manufacturing methods and records, and achieve low cost, short delivery period, and excellent productivity Effect

Active Publication Date: 2013-03-27
HITACHI METALS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But there is no record about its production method

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  • Ferrite forming body, ferrite grinding body, ferrite core, manufacture method, forming method and device, grinding method and device
  • Ferrite forming body, ferrite grinding body, ferrite core, manufacture method, forming method and device, grinding method and device
  • Ferrite forming body, ferrite grinding body, ferrite core, manufacture method, forming method and device, grinding method and device

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Experimental program
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Effect test

Embodiment approach 1

[0096] figure 1 It is a perspective view showing the related drum core 1 of Embodiment 1, figure 2 It is a front view showing the related drum core 1 of Embodiment 1, image 3 It is a plan view showing the related drum core 1 of the first embodiment. As shown in the figure, the drum core 1 (ferrite core) has a circular flange portion 11 , a quadrangular flange portion 12 , and a shaft portion 13 connecting the circular flange portion 11 and the quadrangular flange portion 12 .

[0097] When manufacturing the related drum core 1 of Embodiment 1, each raw material powder of the ferrite material is weighed, mixed in an attritor after adding pure water, and a binder is added to the mixed slurry, Dry with a spray dryer. The obtained mixed powder particles were filled in an aluminum box and calcined, then pure water was added to the calcined particles, and then pulverized with a ball mixer. A binder was added to the obtained slurry, followed by drying with a spray dryer to obt...

Embodiment approach 2

[0114] Next, compare the attached Figures 12 to 17 , Embodiment 2 of the present invention will be described.

[0115] Figure 12 It is a perspective view showing a related ferrite core of Embodiment 2, Figure 13 It is a front view showing the related ferrite core of Embodiment 2, Figure 14 It is a top view showing the related ferrite core of Embodiment 2. The related ferrite core 6 of Embodiment 2 adopts a semicircular quadrangular collar 62 having a circular collar 61 and a combination of a quadrilateral and a circle instead of the quadrilateral collar 12 of Embodiment 1. , and the structure of the shaft portion 63 connecting them. Therefore, the press forming apparatus 7 and the press forming process are also different from the first embodiment. In addition to this, Embodiment 2 adopts basically the same structure as Embodiment 1, so repeated descriptions are omitted.

[0116] Figure 15 It is a schematic diagram showing a press forming apparatus related to Embodime...

Embodiment 1

[0128] As a ferrite material, Fe in terms of mol% 2 o 3 : 47, NiO: 23, CuO: 5, ZnO: 25 ratio Weigh each raw material powder, add pure water and mix in a ball mixer. After adding 1% PVA to the weight of the ferrite material into the mixed slurry, it was dried with a spray dryer. The obtained mixed powder particles were placed in an aluminum box, held in the air at a maximum temperature of 900° C. for 2 hours, and calcined. Add pure water to the pre-fired granules, and then pulverize them with a ball mixer. 2% by weight of PVA based on the weight of the ferrite material was added to the obtained slurry, and it was dried with a spray dryer to obtain pellets. The particle size of the particles is about 100 μm.

[0129] Filling the obtained pellets 10 to a molded body having a cylindrical portion and a substantially square quadrangular prism portion can be obtained such as Figure 4 After being placed in the forming die 20 of the press forming apparatus 2 shown, press forming ...

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Abstract

The invention provides a ferrite core with a terminal electrode at one side, a method for producing the ferrite core at high production rate, a ferrite forming body, a ferrite grinding body, a forming method and device, a grinding method and device. The ferrite forming body (3) comprises a first part (31) comprising the ferrite material, a second part (32) comprising the ferrite material and connected with the first part (31). The sectional area of the second part (32) is larger than that of the first part (31) and the density of the second part (32) is larger than that of the first part (31) by 3-8%.

Description

technical field [0001] The present invention relates to a surface-mounted ferrite core that can be used for inductance elements such as transformers and choke coils, and has flanges on both sides, and in particular, the flanges on one side can be in a shape with a high degree of freedom such as a substantially polygonal shape. A ferrite core, a ferrite molded body, a ferrite ground body, a forming method of a ferrite core, a grinding method, a manufacturing method, a forming method, and a grinding device. Background technique [0002] Ferrite cores are widely used in surface mount coil components constituting inductance components such as transformers and choke coils used in various electronic devices. Such a ferrite core is known as a drum core having circular or substantially quadrilateral flanges on both sides. Hereinafter, the ferrite core is also referred to as a drum core. [0003] Generally, when using a drum core with circular flanges on both sides for an inductanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/26C04B35/622B28B3/08B24B19/22H01F41/02
Inventor 岸本雅史田中将浩樋口丰
Owner HITACHI METALS LTD