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Molding method and apparatus for green compact of powder metallurgy fine core block

A technology of powder metallurgy and forming method, which is applied in the direction of material forming presses, presses, manufacturing tools, etc., can solve problems such as powder metallurgy fine pellet fracture, achieve the effect of solving fracture problems and improving work efficiency

Inactive Publication Date: 2006-10-25
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a powder metallurgy fine pellet green body forming method and device that can solve the fracture problem during powder metallurgy fine pellet green body molding and improve the green body forming integrity rate

Method used

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  • Molding method and apparatus for green compact of powder metallurgy fine core block

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Embodiment Construction

[0013] The present invention will be further described below in conjunction with embodiment.

[0014] like figure 1 As shown, the separation plug 3 is placed on the material plug 4, and then stuffed into the bottom end of the molding cavity of the rubber mold steel mold combination mold 1, and the material plug 4 is outside the separation plug 3, both of which are made of rubber The same diameter, but the separation plug 3 is thinner; then fill the mixed powder metallurgy material 2 from the other end of the molding cavity of the mold 1 into the molding cavity, and then put another separation plug 3 and material plug 4 into the mold 1 The other end of the molding cavity, and the material plug 4 is outside the separation plug 3. The two end faces of the material 2 are in contact with the separation plug 3 instead of the material plug 4 .

[0015] The above operation can also be: after the mold 1 is placed, the material plug 4 and the separation plug 3 are inserted into the bo...

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Abstract

The invention relates to a method and a device for preparing a powder metallurgy material, in particular to a method and a device for forming a green body of a powder metallurgy fine pellet. The technical solution adopted is to add a separation plug made of rubber between the material plug and the material at both ends of each molding cavity of the rubber mold and steel mold combination mold when the green body is formed. The problem of breakage during the molding process makes the green body intact rate reach more than 99%. The method and device can be used to press and form various powder metallurgy fine pellet green bodies with a section diameter below 8mm.

Description

technical field [0001] The invention relates to a method and a device for preparing a powder metallurgy material, in particular to a method and a device for forming a green body of a powder metallurgy fine pellet. Background technique [0002] In the existing powder metallurgy fine pellet green body molding method, the ideal molding method is to use a combination of porous rubber mold and steel mold to press. This method better solves the serious problem of the green body sticking to the mold when the steel mold is only used for pressing, and can make the green body intact rate reach more than 99%. But because fine core block green body section radius is about 6mm, and length is more than 15mm, and its long diameter is relatively big, presses with above-mentioned porous rubber mold steel mold combined mold compression molding method, although can solve the sticky mold problem of green body, but When the green body is released from the mold, that is, when the pressure is rel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B30B11/00B30B15/02B22F3/03
Inventor 龙冲生杨勇飞乔慧武邱邦辰
Owner NUCLEAR POWER INSTITUTE OF CHINA