KR101360393B1 - Method for producing metal mesh filter controlled the size of pores and the metal mesh filter produced thereby - Google Patents

Abstract

The present invention relates to a metal mesh filter, and more particularly, to a method of manufacturing a metal mesh filter capable of controlling the size of pores formed in a filter using a powder compression vacuum deposition method, and a metal mesh filter manufactured by the method. .

Description

Method for producing metal mesh filter with controlled pore size and metal mesh filter manufactured by the method

The present invention relates to a metal mesh filter, and more particularly, to a method of manufacturing a metal mesh filter capable of controlling the size of pores formed in a filter using a powder compression vacuum deposition method, and a metal mesh filter manufactured by the method. .

The metal filter may be classified into a sintered powder metal filter, a metal wire mesh filter, a sintered metal fiber filter, and the like according to the form of the material.

First, as the sintered powder metal filter, a spherical powder having a uniform size is used to control porosity, and the filter is manufactured by sintering the powder by pressing or sintering without pressing the mold according to the characteristics of the filter. .

In addition, the metal mesh filter is a filter using a mesh woven a metal wire in a certain shape, and uses a plurality of meshes having different mesh sizes or different weaving methods depending on characteristics.

The sintered metal fiber filter is formed into a web using a metal fiber having a diameter of 5 to 100 μm, and then manufactured into a filter material by a sintering and rolling process. This is called a depth type filter in which fibers are arranged in a disordered manner without any directivity and fluids such as gas or liquid pass through the filter in a zigzag path and filter solid particles.

The metal filters are widely controlled to have a porosity of at least 30 to 90%, depending on the material. The sintered powder metal filter has a porosity of 30 to 40% and the metal wire mesh filter has a porosity of 50 to 60%. %, In the case of the sintered metal fiber filter, the porosity can be adjusted to 50 to 90%. As the metal filter has a larger porosity, the resistance of the filter is lower, and thus a pressure loss is lowered. Therefore, a sintered metal fiber filter having a large porosity is generally used.

By the way, the sintered metal fiber filter has a low porosity (volume ratio of the pore ratio to the total volume), which is low in efficiency and has a higher porosity than the sintered powder metal filter, which has a problem of generating a high differential pressure. The size of the diameter of the metal fiber for producing the pore size in nm when manufacturing the filter of the nonwoven fabric is not only limited, but the size of the pores is not uniform by pressing the irregularly entangled metal fibers to produce a sheet in the form of a nonwoven fabric. There is this.

On the other hand, the metal mesh filter uses only a metal mesh, so that an expensive metal fiber is unnecessary, but the size of the microparticles that can be filtered is determined according to the diameter and the weaving method of the metal mesh. Since the diameter of the finer and the weaving method is also complicated, the manufacturing process is complex and the manufactured metal filter is disadvantageous inevitably expensive.

The present inventors completed the present invention by developing a powder compression vacuum deposition method for producing a metal mesh filter as a result of research efforts to solve this problem.

Accordingly, it is an object of the present invention to provide a method of manufacturing a metal mesh filter which can not only improve porosity but also control the pore size formed as desired, and a metal mesh filter manufactured by the method.

Another object of the present invention is to provide a metal mesh filter manufacturing method capable of forming a pore of a uniform size and standardization and a metal mesh filter manufactured by the method.

It is still another object of the present invention to provide a metal mesh filter manufacturing method capable of manufacturing a metal mesh filter having uniform pores of nano size and improving differential pressure and filtration efficiency, and a metal mesh filter manufactured by the method. .

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object of the present invention, the present invention is a surface treatment step of removing foreign matter on the surface of the metal mesh formed with pores having a uniform size; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a pore size controlled metal mesh filter including a vacuum deposition step of vacuum depositing the compressed metal mesh.

In an exemplary embodiment, the method may further include an overlapping step of disposing the surface-treated other metal meshes so that a portion of the pores formed on the metal meshes overlap each other before performing the first stacking step.

In a preferred embodiment, the size of the first metal powder is 2 to 3 times the size of the pore size, the size of the second metal powder is 1/3 to 1 times the size of the pore size.

In a preferred embodiment, the pressing treatment step is the temperature T is Tm-200 ℃ <T <Tm (Tm: melting temperature of the first and second metal powder), pressurization conditions of 30 to 70kgf / ㎠ Is performed in

In a preferred embodiment, the crimped metal mesh obtained after the crimping treatment step has a pore size of 25㎛ or less, and forms a porosity of 60% or more.

In a preferred embodiment, the vacuum deposition step includes the step of fixing the crimped metal mesh in the chamber of the vacuum deposition apparatus; And compressing the metal particles while maintaining a pressure condition of 10 ^-1 to 10 ^-5 torr and a temperature T of Tm-100 ° C <T <Tm (Tm: melting temperature of the first and second metal powders). Spraying and coating the treated metal mesh.

In a preferred embodiment, the first metal powder and the second metal powder is at least one selected from the group consisting of stainless steel, aluminum, nickel, titanium, copper, zinc and chromium.

In addition, the present invention provides a metal mesh filter having a pore size controlled, characterized in that manufactured by any one of the above-described manufacturing method.

In a preferred embodiment, the pore size formed in the metal mesh filter is 2㎛ or less, the porosity is 80% or more.

The present invention has the following excellent effects.

According to the present invention, not only porosity is improved, but the pore size to be formed can be controlled as desired.

In addition, according to the present invention can form a pore of a uniform size can be standardized.

In addition, according to the present invention can be produced a metal mesh filter having a uniform pore of the nano-size can improve the differential pressure and filtration efficiency.

1 is a flow chart of a schematic process of a method for manufacturing a metal mesh filter with a controlled pore size according to an embodiment of the present invention.
Figure 2 is a schematic perspective view of some processes of the method for manufacturing a metal mesh filter pore size controlled according to an embodiment of the present invention.
Figure 3 is a perspective view of the overlapping metal mesh of the pore size controlled metal mesh filter manufacturing method according to an embodiment of the present invention.

Although the terms used in the present invention have been selected as general terms that are widely used at present, there are some terms selected arbitrarily by the applicant in a specific case. In this case, the meaning described or used in the detailed description part of the invention The meaning must be grasped.

Hereinafter, the technical structure of the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Like reference numerals used to describe the present invention throughout the specification denote like elements.

The technical feature of the present invention is to prepare a metal mesh filter by laminating a metal powder on a metal mesh having micro-sized pores, compressing the same, and then vacuum depositing it to uniformly control the size of the pores formed in the filter as well as the desired size. It can be controlled easily.

That is, by changing the pore size of the metal mesh and the size of the metal powder laminated on the metal mesh as desired, the pore size formed on the metal mesh can be reduced, so that the pore size and porosity of the filter formed during vacuum deposition can be quickly and This is because it can be easily controlled.

Therefore, the method of manufacturing a metal mesh filter with a controlled pore size of the present invention includes a surface treatment step of removing foreign substances on the surface of the metal mesh with pores having a uniform size as shown in FIG. 1; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a vacuum deposition step of vacuum depositing the crimped metal mesh.

As shown in Figure 2, after performing a surface treatment step (a), such as washing to remove foreign matters such as rust or oil on the surface of the metal mesh, the metal mesh on the metal mesh surface treatment step is performed Performing a first lamination step (b) of stacking the first metal particles having a size larger than the size of the pores formed in the first metal powder; The second lamination step (c) of laminating the bimetallic powder is performed.

In some cases, the method may further include an overlapping step of disposing the surface-treated other metal meshes so that a part of the pores formed on the metal meshes overlap each other before performing the first lamination step, that is, before the first metal powder is laminated. There is, through the overlapping step it is possible to easily improve the porosity and easily adjust the pore size formed.

Looking at the overlapping step in more detail with reference to Figure 3 to the surface-treated metal mesh is superimposed on another metal mesh, it is possible to easily improve the porosity and adjust the pore size by adjusting the overlapping position Able to know.

Here, the size of the first metal powder is 2 to 3 times the size of the pore size, the size of the second metal powder is preferably 1/3 to 1 times the size of the pore size, in particular micro-pore formed This is because when the metal mesh is used, controlling the size of the first and second metal powders stacked as described above may form a metal mesh filter having nano-sized uniform pores. In addition, the first metal powder and the second metal powder is preferably at least one selected from the group consisting of stainless steel, aluminum, nickel, titanium, copper, zinc, and chromium. The first metal powder and the second metal powder may be formed of a metal mesh. It is more preferable that it is decided according to a material.

In the crimping treatment step, the temperature T is Tm-200 ° C. < T < Tm (Tm: melting temperature of the first and second metal powders), and is preferably performed under a pressurization condition of 30 to 70 kgf / cm 2. If it is less than Tm-200 ℃, even if sufficient pressure is applied, the bonding strength may be weakened. If the heating temperature exceeds Tm, the metal powder may melt and fill all the pores.

As such, the crimped metal mesh obtained after the crimping treatment step has a pore size of 25 μm or less and forms a porosity of 60% or more.

Thereafter, a vacuum deposition step is performed, wherein the vacuum deposition step includes fixing the pressed metal mesh inside the chamber of the vacuum deposition apparatus; And compressing the metal particles while maintaining a pressure condition of 10 ^-1 to 10 ^-5 torr and a temperature T of Tm-100 ° C <T <Tm (Tm: melting temperature of the first and second metal powders). Spraying and coating the treated metal mesh. Here, the metal particles that are sprayed and coated on the pressed metal mesh are preferably one having at least a nano size selected from the group consisting of stainless steel, aluminum, nickel, titanium, copper, zinc, and chromium, wherein the first metal powder And it is more preferably determined according to the material of the second metal powder.

As such, the metal particles are vacuum-deposited on the compressed metal mesh to easily prepare a metal mesh filter having pores of 2 μm or less and a porosity of 80% or more.

Example

1. Surface treatment

The metal mesh (200mesh) of the STS material was washed.

2. Lamination of the first metal powder and the second metal powder

After that, the Al particles (first metal powder), which are twice as large as the pore size, were first laminated on the metal mesh using a sieving effect. Subsequently, Al particles (second metal powder) having a size 1/3 times smaller than the size of the metal mesh pores were laminated secondly using a sieving effect.

3. Crimping

Pressed metal having a porosity of 25 μm and a porosity of 60% by pressing a metal mesh having the first and second metal powders laminated in a rolling apparatus equipped with a pair of rollers at a temperature of 600 ° C. and 40 kgf / cm 2. A mesh was obtained.

4. Vacuum deposition

Fixing the metal mesh compressed in the chamber of vacuum evaporation apparatus and heating 10 ~ ¹ ~ 10 ^-5 torr while heating Al particles at 500 ~ 600 ℃ in the heating part and coating the surface of metal mesh through the injection hole After drying / heat treatment to prepare a metal mesh filter.

Experimental Example

The pore size and porosity of the metal mesh filter prepared in Example were measured. The pore size was 2 μm and the porosity was 80%.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, Various changes and modifications will be possible.

Claims (9)

delete A surface treatment step of removing foreign substances from the surface of the metal mesh having pores having a uniform size; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a vacuum deposition step of vacuum depositing the crimped metal mesh.
Manufacturing a metal mesh filter having a pore size controlled further comprises an overlapping step of disposing the surface-treated other metal mesh so as to overlap a portion of the pores formed on the metal mesh before performing the first lamination step Way.
A surface treatment step of removing foreign substances from the surface of the metal mesh having pores having a uniform size; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a vacuum deposition step of vacuum depositing the crimped metal mesh.
The pore size controlled metal mesh filter is characterized in that the size of the first metal powder is 2 to 3 times the pore size, and the size of the second metal powder is 1/3 to 1 times the pore size. Manufacturing method.
A surface treatment step of removing foreign substances from the surface of the metal mesh having pores having a uniform size; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a vacuum deposition step of vacuum depositing the crimped metal mesh.
The pressing treatment step is characterized in that the temperature (T) is Tm-200 ℃ <T <Tm (Tm: melting temperature of the first and second metal powder), it is carried out under pressure conditions of 30 to 70kgf / ㎠ Method of manufacturing a metal mesh filter with a controlled pore size.
5. The method of claim 4,
The press-treated metal mesh obtained after the crimping treatment step has a pore size of 25 μm or less and forms a porosity of 60% or more.
A surface treatment step of removing foreign substances from the surface of the metal mesh having pores having a uniform size; Stacking a first metal powder larger than the pore size on the metal mesh; A second laminating step of laminating a second metal powder having the pore size or less on the metal mesh on which the first metal powder is laminated; A compression treatment step of thermally compressing the metal mesh on which the first metal powder and the second metal powder are laminated; And a vacuum deposition step of vacuum depositing the crimped metal mesh.
The vacuum deposition step includes the step of fixing the crimped metal mesh in the chamber of the vacuum deposition apparatus; And
Press-treating the metal particles while maintaining a pressure condition of 10 ^-1 to 10 ^-5 torr and a temperature T of Tm-100 ° C <T <Tm (Tm: melting temperature of the first and second metal powders). Method of manufacturing a metal mesh filter with a pore size controlled, comprising the step of spraying the coated metal mesh.
7. The method according to any one of claims 2 to 6,
The first metal powder and the second metal powder is a method of manufacturing a metal mesh filter with a controlled pore size, characterized in that at least one selected from the group consisting of stainless steel, aluminum, nickel, titanium, copper, zinc, chromium. A metal mesh filter with a controlled pore size, which is prepared by the method of any one of claims 2 to 6.
The method of claim 8,
The pore size controlled metal mesh filter, characterized in that the pore size formed on the metal mesh filter is less than 2㎛, porosity is 80% or more.

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