Forming and pressing device for magnetic core production

Abstract

The invention provides a forming pressing device for magnetic core production, which comprises a lower die, a top sleeve, a mold core and a bottom plate, the lower die is located above the bottom plate, the lower die is fixedly connected with the bottom plate, the lower die is provided with a cavity, the cavity vertically penetrates through the bottom plate, the top sleeve and the mold core, the top sleeve is inserted into the cavity, and the bottom plate is fixedly connected with the bottom plate. The outer wall of the top sleeve is slidably connected with the inner wall of the cavity in the vertical direction, the mold core is inserted into the top sleeve, the inner wall of the top sleeve is slidably connected with the outer wall of the mold core in the vertical direction, the top face of the top sleeve is lower than the top face of the mold core and the top face of the lower mold, and the upper end of the mold core is located in the cavity. The driving device is fixedly arranged on the bottom plate and is in transmission connection with the mold core through a transmission assembly, the mold core is rotationally connected with the bottom plate, and the driving device is used for driving the mold core to rotate. The mold core and the magnetic core slide relatively in a spiral mode, and friction resistance between the inner wall of the magnetic core and the outer wall of the mold core in the process that the magnetic core is ejected out is reduced.

Description

technical field [0001] The present application relates to the technical field of magnetic core pressing, in particular to a forming and pressing device for magnetic core production. Background technique [0002] The magnetic core refers to a sintered magnetic metal oxide composed of various iron oxide mixtures. For example, manganese-zinc ferrite and nickel-zinc ferrite are typical core body materials. Manganese-zinc ferrites are characterized by high magnetic permeability and high magnetic flux density, and have low loss characteristics. Nickel-zinc ferrite has the characteristics of extremely high resistivity and low magnetic permeability of less than a few hundred. Ferrite cores are used in coils and transformers in various electronic devices. [0003] In the prior art, a pressing process is usually used to press and shape the magnetic core, for example, filling raw material powder into a cavity, and then using a pressure head to squeeze the filled powder into the cavi...

AI Technical Summary

Problems solved by technology

[0004] During the process of ejecting the core from the top sleeve, due to the tight fit between the inner wall of the magnetic core and the outer wall of the core, the frictional force encountered by the magnetic core and the core when sliding relative to each other is relatively large, and the friction generates heat, which not only leads to energy consumption High, the wear of the magnetic core is serious, and it may cause vibration and rupture of the magnetic core during friction

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