Manufacture method of ferrite core blank and ferrite core

Abstract

The invention discloses a manufacture method of ferrite core blank, comprising the following steps of: (1) mixing 70%-95% of ferrite powder and 5%-30% of binder into pug, cooling to the room temperature, crushing into the material with a phi of 3-8 mm, wherein the ferrite powder comprises 60%-70% of iron oxide, 10%-20% of nickel oxide, 2%-10% of copper oxide and 15%-25% of zinc oxide; and the binder comprises 40%-80% of paraffin, 5%-25% of polyethylene, 5%-25% of polypropylene, 1%-3% of o-dioctyl phthalate, 1%-3% of dibutyl phthalate and 2%-8% of oleic acid; (2) heating and melting the material at 120-220 degrees centigrade, and injecting the molten material into a mold cavity under a pressure of 50-150 Bar; and (3) conducting the heat of the material out through a mold after the mold cavity is filled, opening the mold and removing the solidified ferrite core blank.

Description

technical field [0001] The invention relates to the manufacture of a ferrite core, in particular to a method for manufacturing a ferrite core blank and a method for manufacturing the ferrite core. Background technique [0002] The production technology of the traditional magnetic core is mainly the dry pressing molding method. The disadvantages of this method are that the shape of the molded product is relatively limited, the cost of the mold is high, the strength of the green body is low, the internal compactness of the green body is inconsistent, and the uniformity of the structure Relatively poor, etc., and because the core column of the magnetic core is generally cylindrical, dry pressing cannot be completed at one time, it needs to be pressed into a square column shape, and then processed into a cylindrical shape with a lathe, which not only increases the process, but also increases the production cost and time, there is no guarantee of product consistency. Contents o...

AI Technical Summary

Problems solved by technology

[0002] The production technology of the traditional magnetic core is mainly the dry pressing molding method. The disadvantages of this method are that the shape of the molded product is relatively limited, the cost of the mold is high, the strength of the green body is low, the internal compactness of the green body is inconsistent, and the uniformity of the structure Relatively poor, etc., and because the core column of the magnetic core is generally cylindrical, dry pressing cannot be completed at one time, it needs to be pressed into a square column shape, and then processed into a cylindrical shape with a lathe, which not only increases the process, but also increases the production cost and time, there is no guarantee of product consistency

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