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Device for high-density molding and method for high-density molding of mixed powder

A mixed powder, high-density technology, which is applied in the direction of transportation and packaging, material forming presses, manufacturing tools, etc., can solve the problems of reduced quality of powder compacts, insufficient density, insufficient mechanical strength, etc., to improve fluidity , to achieve the effect of simplification of the device and simple operation

Inactive Publication Date: 2013-12-04
AIDA ENG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Not enough mechanical strength
Furthermore, when performing sintering treatment (high-temperature atmosphere), since the oxidation is aggravated with temperature and time, the lubricant in the powder particle coating state burns and produces residues, resulting in a decrease in the quality of the powder compact after press molding. Therefore, the actual production When the density becomes 7.3g / cm 3 the following
Also, any improvements are complex and inevitably costly
The operation is also troublesome and the practicability is poor
[0009] Especially considering the use of powder compacts to make magnetic cores (magnetic cores) for electromagnetic equipment (motors or transformers, etc.), it is often pointed out that this level of density (7.3g / cm 3 Below) is far from meeting the needs

Method used

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  • Device for high-density molding and method for high-density molding of mixed powder
  • Device for high-density molding and method for high-density molding of mixed powder
  • Device for high-density molding and method for high-density molding of mixed powder

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Effect test

no. 1 approach ）

[0067] The high-density molding device 1 of this mixed powder, such as Figure 1 ~ Figure 6E As shown, it has a mixed powder supply machine 10, a container 23, a mixed powder transfer device (lower punch 37), a first press forming machine 30, a heating and heating machine 40, an intermediate powder compact transfer device (extrusion rod 50), The second pressure molding machine 60 and the product discharge device 70 are arranged so that the high-density molding method of the mixed powder can be stably and reliably implemented. The high-density molding method of the mixed powder is composed of the following steps: figure 1 The mixed powder filling step (PR1) of filling the mixed powder 100 shown in (A) into the container 23; the mixed powder transfer step (PR2) of transferring the mixed powder 100 into the first mold 31; The mixed powder 100 applies the first pressing force P1 to form the intermediate powder compact forming step (PR3) of the mixed powder intermediate compact (so...

no. 2 approach ）

[0182] The implementation is as Figure 7 , Figure 8 shown. When the basic structure and functions are set to be the same as those in the first embodiment ( Figure 1 ~ Figure 6E ) are the same, but the second preheating device 64 is provided on the second mold 61 (die 62 ) constituting the second press molding machine 60 . Furthermore, a first preheating device 34 is provided on the first mold 31 (die 32 ) constituting the first press molding machine 30 .

[0183] That is, it is set to preheat the second mold 61 and prevent the temperature drop of the heated intermediate green compact 110 . In addition, the first mold 31 can be preheated and the intermediate green compact 110 can be preheated. In this embodiment, both the first preheating device 34 and the second preheating device 64 are provided, but either one may be provided depending on the working temperature environment and the like.

[0184] in addition, Figure 7 ( Figure 8 ) related to the first embodiment ...

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Abstract

In the present invention, a mixed powder (100) filling the inside of a container cavity (24) is transferred into the cavity of a first die, a first applied pressure is applied to the mixed powder (100) in the first die (31), molding an intermediate powder compact (110), the post-molding first die (31) and intermediate powder compact (110) are heated, causing the intermediate powder compact (110) to be warmed to the melting-point-equivalent temperature of a lubricant, the post-warming intermediate powder compact (110) is transferred into the cavity of a second die (61) and a second applied pressure is applied, thus molding a high-density completed powder compact.

Description

technical field [0001] The invention relates to a high-density forming method and a high-density forming device, which can form high-density (such as 7.75g / cm 3 ) powder compact. Background technique [0002] Generally, the powder metallurgy technology is to first pressurize (compress) the metal powder to form a powder compact of a specified shape, and then heat the powder compact to a temperature near the melting point of the metal powder to promote interparticle bonding (solidification). A series of technologies for sintering treatment. As a result, mechanical parts with complex shapes and high dimensional accuracy can be manufactured at low cost. [0003] With the demand for smaller and lighter mechanical parts, it is required to increase the mechanical strength of powder compacts. On the other hand, if the powder compact is exposed to a high-temperature atmosphere, the magnetic properties are reduced. Therefore, the subsequent high-temperature treatment (sintering tr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/16B22F1/105
CPCB30B11/027B22F3/10C22C33/02B30B15/34B30B15/304H01F41/02B22F3/02B30B11/10B22F3/03H01F1/22C22C45/00C22C38/00C22C38/02C22C45/02H01F41/0246B22F3/004B22F2003/023B22F2003/145B22F2998/10B30B15/0011B22F1/105B22F3/003B22F3/16
Inventor 长谷川和宏平井佳树
Owner AIDA ENG LTD
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