KR-20260066214-A - METHOD FOR MANUFACTURING A POROUS METAL MATERIAL AND A POROUS METAL MATERIAL MANUFACTURED BY THE METHOD

KR20260066214AKR 20260066214 AKR20260066214 AKR 20260066214AKR-20260066214-A

Abstract

The present invention relates to a method for manufacturing a porous metal material and a porous metal material manufactured by the method, comprising a mixture forming step of forming a metal binder mixture by mixing only a metal component and a binder, a precursor forming step of forming a precursor of a porous metal material by passing the metal binder mixture formed in the mixture forming step between two spaced-apart pressure rollers, and a sintering step of sintering the precursor formed in the precursor forming step, thereby simplifying the manufacturing process of a porous metal material through a solvent-free process and reducing manufacturing costs.

Inventors

신종민
유동우
배충만
김연신
임민택

Assignees

주식회사 한화

Dates

Publication Date: 20260512
Application Date: 20241104

Claims (15)

A mixture forming step of forming a metal binder mixture by mixing only the metal component and the binder; A precursor forming step for forming a porous metal material precursor by passing the metal binder mixture formed in the above mixture forming step between two spaced pressure rollers; and A method for manufacturing a porous metal material characterized by including a sintering step for sintering a precursor formed by the above-mentioned precursor molding step.
In paragraph 1, A method for manufacturing a porous metal material, characterized in that the above mixture forming step involves mixing only a metal component and a binder to form a metal binder mixture, and does not include any solvents or other additives other than the metal component and the binder.
In paragraph 1, The above mixture forming step is, A method for manufacturing a porous metal material characterized by forming a metal binder mixture with 97% to 85% by weight of a metal component and 3% to 15% by weight of a binder, based on 100% by weight of the total metal binder mixture.
In paragraph 3, A method for manufacturing a porous metal material, characterized in that the above mixture forming step involves mixing the metal component and the binder within a temperature range of 60°C to 110°C.
In paragraph 3, A method for manufacturing a porous metal material, characterized in that the metal component is a metal powder having an average particle size in the range of about 0.1 μm to about 200 μm.
In paragraph 3, A method for manufacturing a porous metal material characterized in that the binder is polyvinyl alcohol or polyvinyl butyral (PVB).
In paragraph 1, The above mixture forming step is, A process of introducing metal powder and binder into the interior of a screw conveyor through an input section located at one end; and A method for manufacturing a porous metal material, characterized by including a process in which metal powder and binder are conveyed from one end of a housing to the other end by the rotation of a conveying screw within the screw conveyor, while being conveyed while mixing with each other, and the evenly mixed metal binder mixture is discharged through an outlet located at the other end of the screw conveyor.
In paragraph 1, The above precursor molding step is, A method for manufacturing a porous metal material, characterized by forming a precursor of a porous metal material to be manufactured by passing a metal binder mixture formed in the above mixture forming step between two spaced pressure rollers, and forming the precursor of the porous metal material by applying pressure between the two pressure rollers within a range of 10 kg/cm to 900 kg/cm.
In paragraph 1, The above precursor molding step is, A first precursor formation process for pre-forming a porous metal material precursor by passing it between two pressure rollers; and A method for manufacturing a porous metal material, characterized by including a second precursor formation process for forming a precursor of a porous metal material to be manufactured by passing the precursor formed in the first precursor formation process between two pressure rollers.
In Paragraph 9, The above first precursor formation process is, A metal binder mixture is passed between a first pressure roller member and a second pressure roller member positioned spaced apart from one side of the first pressure roller member to form a porous metal material appliance body, and The above second precursor formation process is, A method for manufacturing a porous metal material, characterized in that a precursor of the porous metal material is formed by passing the third pressure roller member, which is spaced apart from the lower side of the second pressure roller member, and the second pressure roller member through the space between the second pressure roller member.
In Paragraph 10, The first pressure roller member and the second pressure roller member are positioned so that their centers are located on a horizontal line and are arranged parallel to each other in a first direction, or their centers are positioned on a vertical line and are arranged parallel to each other in a second direction. The second pressure roller member and the third pressure roller member are, A method for manufacturing a porous metal material characterized in that the first pressure roller member and the second pressure roller member are arranged in the second direction when arranged in the first direction, and are arranged in the first direction when arranged in the second direction.
In Paragraph 11, The above first precursor formation process forms a porous metal material sphere by applying pressure within the range of 10 kg/cm² to 500 kg/cm², and The above second precursor formation process involves finally forming a porous metal material precursor by applying pressure within the range of 10 kg/cm² to 900 kg/cm², A method for manufacturing a porous metal material, wherein the second precursor formation process above involves pressurizing the first precursor at a pressure greater than 1 time and less than 2 times the pressure applied in the first precursor formation process.
A porous metal material characterized by being manufactured by a method for manufacturing a porous metal material according to any one of claims 1 to 11.
In Paragraph 13, A porous metal material characterized by a pore size within the range of 0.1㎛ to 200㎛.
In Paragraph 13, A porous metal material characterized by having a porosity within the range of 30% to 90% and being in the form of a film or sheet with a thickness of 1000㎛ or less.

Description

Method for manufacturing a porous metal material and a porous metal material manufactured by the method The present invention relates to a method for manufacturing a porous metal material and a porous metal material manufactured by the method. Specifically, it relates to a method for manufacturing a porous metal material in which the manufacturing process is simplified through a solvent-free process, and a porous metal material manufactured by the method. In general, porous metal materials are metal materials containing numerous pores that possess various characteristics such as thermal insulation, fire resistance, and eco-friendliness, and are utilized in various fields including structures, transportation machinery, building materials, and energy absorption devices. As a prior patent related to the present invention, Korean Patent Registration No. 2063049, "Method for manufacturing metal foam," has been proposed. Conventional methods for manufacturing porous metal materials, such as Korean Patent Registration No. 2063049 "Method for manufacturing metal foam," involve preparing a metal slurry by mixing metal powder, a solvent, and a binder, then coating and drying the slurry to a specific thickness, and finally sintering it. However, conventional methods for manufacturing metal materials have problems such as complex manufacturing processes and increased manufacturing costs, as they involve mixing metal powder, solvent, binder, as well as other additives to produce a slurry. In addition, the application of solvents or other additives generated hazardous waste and caused problems regarding the manufacturing environment. FIG. 1 is a flowchart illustrating one embodiment of a method for manufacturing a porous metal material according to the present invention. FIG. 2 is a schematic diagram illustrating a manufacturing apparatus used in the method for manufacturing a porous metal material according to the present invention. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. However, the technical concept of the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided to ensure that the disclosed content is thorough and complete and to ensure that the concept of the present invention is sufficiently conveyed to those skilled in the art. FIG. 1 is a flowchart illustrating an embodiment of a method for manufacturing a porous metal material according to the present invention, and FIG. 2 is a schematic diagram illustrating a manufacturing apparatus used in the method for manufacturing a porous metal material according to the present invention. An embodiment of a method for manufacturing a porous metal material according to the present invention is described in detail below with reference to FIGS. 1 and 2. One embodiment of the method for manufacturing a porous metal material according to the present invention includes a mixture forming step (S100) of forming a metal binder mixture by mixing only a metal component and a binder, a precursor forming step (S200) of forming a precursor of a porous metal material by passing the metal binder mixture formed in the mixture forming step (S100) between two spaced-apart pressure rollers, and a sintering step (S300) of sintering the precursor formed in the precursor forming step (S200). The mixture formation step (S100) is an example in which only the metal component and the binder are mixed to form a metal binder mixture, and the metal binder mixture is formed without including any solvent or other additives other than the metal component and the binder. In addition, the mixture forming step (S100) is exemplified by forming a metal binder mixture with 97% to 85% by weight of metal components and 3% to 15% by weight of binder based on 100% by weight of the total metal binder mixture. The mixture forming step (S100) is exemplified by mixing a metal component and a binder within a temperature range of 60°C to 110°C. It is noted that the metal component may be copper powder or nickel powder as an example, and may also be used in combination of one or more selected from the group consisting of tin, aluminum, molybdenum, silver, platinum, gold, aluminum, magnesium, and iron. It should be noted that the metal component may be in the form of metal powder with an average particle size in the range of about 0.1 μm to about 200 μm, and that an appropriate range of particle size can be selected and used by considering the thickness, porosity, and pore size according to the shape and intended use of the porous metal material to be manufactured. That is, the metal component can be implemented using at least one of the known metals used in the manufacture of porous metal materials, so further detailed explanation is omitted. The binder is uniformly mixed between the metal powders to impart physical rigidity to the