Multisource dynamic pressure isopressing powder molding process

A technology of powder molding and isostatic pressing, which is applied to presses, manufacturing tools, etc., can solve the problems of high driving pressure and high cost, and achieve the effects of ensuring density, reducing friction, and preventing the rise of forming resistance

Inactive Publication Date: 2011-10-26
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of excessive driving pressure and high cost in the existing isostatic pressing forming technology, the present invention provides a multi-source dynamic pressure isostatic pressing powder forming process

Method used

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  • Multisource dynamic pressure isopressing powder molding process
  • Multisource dynamic pressure isopressing powder molding process
  • Multisource dynamic pressure isopressing powder molding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Multi-source dynamic pressure isostatic pressing powder molding process, which is realized by the following steps:

[0015] (1) Place the bag containing the powder in the inner cavity of the working cylinder of the isostatic press, and open a pressure relief port and several liquid inlets on the wall of the working cylinder, and then install a pulsating Pressure power source; (2) Seal the inner cavity of the working cylinder; (3) Fill the working fluid into the inner cavity of the working cylinder through each liquid inlet to stably increase the pressure. During the process of stabilizing the boost, each pulsating pressure power source Corresponding liquid inlets superimpose pulsating pressure successively. The pulsating pressures of each liquid inlet interfere with each other and form a randomly changing dynamic pressure field in the working cylinder. The dynamic pressure field squeezes the powder in the sheath to ensure During the molding process, the powder is evenly...

Embodiment 2

[0019] Multi-source dynamic pressure isostatic pressing powder molding process, which is realized by the following steps:

[0020] (1) Place the bag containing the powder in the inner cavity of the working cylinder of the isostatic press, and open a pressure relief port and several liquid inlets on the wall of the working cylinder, and then install a pulsating Pressure power source; (2) Seal the inner cavity of the working cylinder; (3) Fill the working fluid into the inner cavity of the working cylinder through each liquid inlet to stably increase the pressure. During the process of stabilizing the boost, each pulsating pressure power source Corresponding liquid inlets superimpose pulsating pressure successively. The pulsating pressures of each liquid inlet interfere with each other and form a randomly changing dynamic pressure field in the working cylinder. The dynamic pressure field squeezes the powder in the sheath to ensure During the molding process, the powder is evenly...

Embodiment 3

[0024] Multi-source dynamic pressure isostatic pressing powder molding process, which is realized by the following steps:

[0025] (1) Place the bag containing the powder in the inner cavity of the working cylinder of the isostatic press, and open a pressure relief port and several liquid inlets on the wall of the working cylinder, and then install a pulsating Pressure power source; (2) Seal the inner cavity of the working cylinder; (3) Fill the working fluid into the inner cavity of the working cylinder through each liquid inlet to stably increase the pressure. During the process of stabilizing the boost, each pulsating pressure power source Corresponding liquid inlets superimpose pulsating pressure successively. The pulsating pressures of each liquid inlet interfere with each other and form a randomly changing dynamic pressure field in the working cylinder. The dynamic pressure field squeezes the powder in the sheath to ensure During the molding process, the powder is evenly...

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Abstract

The invention relates to a powder molding process, in particular to a multisource dynamic pressure isopressing powder molding process. In the invention, the problems of excessive driving pressure and expansive cost in the existing isostatic pressing technology can be solved. The multisource dynamic pressure isopressing powder molding process comprises the following steps of: (1) sleeving a bag filled with powder in a work cylinder cavity of an isostatic press; (2) sealing the work cylinder cavity; (3) charging a working solution in the work cylinder cavity through each solution inlet to stably rise pressure; (4) charging the working solution in the work cylinder cavity through each solution inlet to pressurize; (5) stably releasing the pressure and taking out the molded powder. By using the multisource dynamic pressure isopressing powder molding process, the problems of excessive driving pressure and expansive cost in the existing isostatic pressing technology can be solved effectively, the process is not only suitable for a wet bag isopressing, but also suitable for a dry bag isopressing.

Description

technical field [0001] The invention relates to powder forming technology, in particular to a multi-source dynamic pressure isostatic pressing powder forming process. Background technique [0002] Isostatic pressing is a molding technology widely used in powder metallurgy, refractory materials, ceramics, graphite and other powders. Its basic principle is to place the elastic mold (packet) with powder inside in the ultra-high pressure liquid medium of 300~1000MPa. The formed powder is subjected to the same pressure in all directions to form it, so it is called isostatic pressing. Products formed by isostatic pressing technology have the advantages of high density, uniform density of green compact and the ability to form complex parts. Isostatic pressing needs to overcome resistances such as friction and deformation of the powder in the process of pressurizing and maintaining the load. Since it uses static pressure to work, the driving pressure must be ultra-high pressure. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B30B12/00
Inventor 梁义维靳宝全景毅梁国星
Owner TAIYUAN UNIV OF TECH
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