KR20100089197A - Surface treatment method of aluminum-die-casting article - Google Patents

Surface treatment method of aluminum-die-casting article Download PDF

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KR20100089197A
KR20100089197A KR1020090008333A KR20090008333A KR20100089197A KR 20100089197 A KR20100089197 A KR 20100089197A KR 1020090008333 A KR1020090008333 A KR 1020090008333A KR 20090008333 A KR20090008333 A KR 20090008333A KR 20100089197 A KR20100089197 A KR 20100089197A
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aluminum
casting
product
minutes
washing
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KR1020090008333A
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KR101548530B1 (en
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명 옥 박
순 남 김
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순 남 김
명 옥 박
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    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F17/00—Multi-step processes for surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by subclass C21D or C22F or class C25
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/16—Pretreatment, e.g. desmutting
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D11/00—Electrolytic coating by surface reaction, i.e. forming conversion layers
    • C25D11/02—Anodisation
    • C25D11/04—Anodisation of aluminium or alloys based thereon
    • C25D11/18—After-treatment, e.g. pore-sealing
    • C25D11/20—Electrolytic after-treatment
    • C25D11/22—Electrolytic after-treatment for colouring layers

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Abstract

PURPOSE: A surface treatment method for an aluminum-diecasting product is provided to color the surface of an aluminum-diecasting product by filling dye in fine pores formed on the aluminum-diecasting product. CONSTITUTION: A surface treatment method for an aluminum-diecasting product comprises the steps of: performing aluminum-diecasting of a material(100), performing grinding for eliminating burr(200), performing heat treatment to float foreign materials above the surface of the casting product(300), firstly washing off the floated foreign materials with water(400), adding a grinding compound and grinding the surface of the material through vibration and rotation(500), anodizing the product(600), secondly washing the product with water(700), filling dye in fine pores formed on the surface of the product(800), thirdly washing the product with water(900), covering the colored pores with nickel acetate, ammonia and steam(1000), fourthly washing the product(1100), and drying the product with hot wind(1200).

Description

알루미늄-다이캐스팅 표면 처리방법{Surface treatment method of aluminum-die-casting article}Surface treatment method of aluminum-die-casting article

본 발명은 알루미늄-다이캐스팅 표면처리 방법에 관한 것으로서, 더욱 상세하게는 염료 착색 성능이 우수하여, 도색의 활용범위를 보다 광범위하게 휴대폰 케이스와 같은 물품에 확장 적용시킬 수 있는 깨끗한 표면을 획득할 수 있도록 한 알루미늄-다이캐스팅 표면처리 기법에 관련한 것이다.The present invention relates to an aluminum die-casting surface treatment method, and more particularly, to excellent dye coloring performance, so as to obtain a clean surface that can be applied to an article such as a mobile phone case more broadly. It relates to an aluminum die-cast surface treatment technique.

일반적으로, 가벼운 금속소재로 되어 여러 형태의 산업분야에 널리 사용되고 있는 알루미늄은 합금되는 소재금속의 종류에 따라 미국 알루미늄 협회에서 9단계 (1000~9000 계열)로 분류시켜 사용하고 있다.In general, aluminum, which is a light metal material and is widely used in various types of industrial fields, is classified into 9 levels (1000 to 9000 series) by the American Aluminum Association according to the type of alloying material metal.

특히, 항공기나 철도차량 또는 스포츠 용품과 같은 고강도의 구조재로 가장 많이 활용되고 있는 7000 계열로 분류된 알루미늄 합금 조성물(Al-Zn계)은 산화피막 보호막을 약화시키는 아연(Zn)에 의해 합금의 내식성이 크게 떨어져 응력부식에 의한 자연균열 현상이 발생되는 문제점으로 주재료인 알루미늄(Al)에 4 ~ 8(%)의 무게비를 가지는 아연(Zn)과, 1 ~ 3(%)의 마그네슘(Mg)및, 1.6(%)의 구리(Cu)와, 0.2 ~ 0.3(%)의 크롬을 합금 조성시킨 일명 7075합금으로 명명되는 초초두랄민(Duralumin)의 탄생과, 이에 합금 첨가물의 무게비(wt%) 함량을 증가시켜 전술한 문제점을 극복할 수 있게 되었다. In particular, the aluminum alloy composition (Al-Zn-based) classified into the 7000 series, which is most commonly used as a high-strength structural material such as an aircraft, a railroad car, or a sporting goods, is characterized by corrosion resistance of the alloy due to zinc (Zn), which weakens the oxide protective film. Due to this problem, natural cracking phenomenon occurs due to stress corrosion. Zinc (Zn) having a weight ratio of 4 to 8 (%) to aluminum (Al), magnesium (Mg) and 1 to 3 (%) and , The birth of ultra-duralumin, aka 7075 alloy with 1.6 (%) copper (Cu) and 0.2 ~ 0.3 (%) chromium alloy composition, and the weight ratio (wt%) content of the alloy additives It is possible to overcome the above problems by increasing the.

또한, 통상, 다이캐스팅은 다이 주조라고도 하며, 필요한 주조 현상에 완전히 일치하도록 정확하게 가공된 강제의 금형에 용융금속을 주입하여 금형과 똑같은 주물을 얻는 정밀 주조법이고, 이를 다이캐스트 주물이라고 한다.In addition, die casting is also commonly referred to as die casting, and is a precision casting method in which molten metal is injected into a mold of steel that is precisely processed so as to completely match the required casting phenomenon, thereby obtaining a casting that is the same as the die, and this is called die casting casting.

여기에서, 알루미늄 다이캐스팅은 치수가 정확하므로 다듬질할 필요가 거의 없고, 기계적 성질이 우수하여 대량 생산이 가능하다.Here, aluminum die casting is precisely dimensioned so that it is hardly needed to be trimmed, and the mechanical properties are excellent and mass production is possible.

다만, 표면에 기공이 많아 에칭 후 디스머트가 어려워 도금 도장 시 불량률이 높다는 단점을 내포하고 있었다.However, since there are many pores on the surface, it is difficult to dismute after etching, so that the defect rate is high when plating coating.

본 발명은 상기와 같은 문제점을 해결하기 위하여 안출된 것으로서, 염료 착색 성능이 우수하여, 도색의 활용범위를 보다 광범위하게 확장시킬 수 있도록 한 알루미늄-다이캐스팅 표면처리 기법을 제공하는데 목적이 있다. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an aluminum die casting surface treatment technique which is excellent in dye coloring performance and can broadly expand the application range of painting.

상기와 같은 목적을 달성하기 위하여, 알루미늄-다이캐스팅을 수행하는 주조 단계와, 이 주조 단계에서 발생한 버(Burr)와 같은 돌출부를 제거하기 위한 표면 연마 단계와, 상기 주조 단계에서 발생한 규소, 이형제, 금속 슬러지 및 표면 부상물과 같은 이물질을 제거하도록, 이 이물질을 표면위로 부상 유도하기 위해, 1초 내지 20분, 350~450℃에서 열처리하는 열처리 단계와, 상기 열처리 단계에서 표면 위로 부상 유도된 이물질을 물의 낙차에 의해 1초 내지 30분, 1~50℃로 분리하는 제1 수세척 단계와, 모서리가 있는 자갈과 같은 연마용 컴파운드를 소재와 같이 넣고 장비에 진동과 회전을 동시에 주어 소재의 표면을 중간 절삭 및 연마하는 바렐 연삭/연마 단계와, 상기 바렐 연삭/연마 단계를 거친 알루미늄 다이캐스팅 대상물을 양극산화처리(anodizing)하는 아노다이징 단계와, 상기 아노다이징 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제2 수세척 단계와, 상기 아노다이징 공정에서 생성된 미세한 포어(pores) 속에 염료를 채우는 염료 착색 단계와, 상기 염료 착색 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제3 수세척 단계와, 상기 염료 착색 단계에서 착색된 포어를 니켈 아세테이트, 암모니아 및 스팀으로 봉공하는 표면 봉공 단계와, 상기 표면 봉공 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제4 수세척 단계와, 이 수세척 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 30분, 10~150℃에서 열풍 건조하는 건조 단계를 포함하여 이루어진 것을 특징으로 한다.In order to achieve the above object, a casting step for performing aluminum die casting, a surface polishing step for removing protrusions such as burrs generated in the casting step, and silicon, a release agent, a metal generated in the casting step Heat treatment step of heat treatment at 350-450 ° C. for 1 second to 20 minutes to remove the foreign substances such as sludge and surface wounds, and the foreign substances induced above the surface in the heat treatment step. 1 second to 30 minutes due to the drop of water, the first water washing step to separate at 1 ~ 50 ℃, and the abrasive compound such as the gravel with the edge of the material as the material and vibrating and rotating the equipment at the same time to give the surface of the material Barrel grinding / polishing step for intermediate cutting and polishing, and anodizing the aluminum diecasting object which has undergone the barrel grinding / polishing step A second water washing step of washing the aluminum die-casting object subjected to the anodizing step with water for 1 to 20 minutes at 1 to 30 ° C., and filling the dye into fine pores generated in the anodizing process. A dye washing step, a third water washing step of washing the aluminum die-casting object subjected to the dye coloring step at 1 to 30 ° C. at 1 to 30 ° C., and the pores colored in the dye coloring step are nickel acetate, ammonia, A surface sealing step of sealing with steam, a fourth water washing step of washing the aluminum die casting object subjected to the surface sealing step at 1 to 30 ° C. for 1 minute to 20 minutes, and an aluminum die casting object subjected to this washing step 1 minute to 30 minutes, characterized in that it comprises a drying step of hot air drying at 10 ~ 150 ℃.

본 발명에 따르면, 염료 착색 성능이 우수하여, 도색의 활용범위를 보다 광범위하게 휴대폰 케이스와 같은 물품에 확장 적용시킬 수 있는 깨끗한 표면을 획득할 수 있도록 한 알루미늄-다이캐스팅 표면처리 기법을 제공하게 되는 등의 매우 뛰어난 효과가 있는 것이다.According to the present invention, it is possible to provide an aluminum die-casting surface treatment technique, which is excellent in dye coloring performance, so as to obtain a clean surface that can be applied to an article such as a mobile phone case more widely. Will have a very good effect.

이하, 본 발명의 구성을 첨부된 도면을 참고로 설명하면, 도 1은 본 발명에 따른 알루미늄-다이캐스팅 표면처리 기법을 나타낸 순차도이다. Hereinafter, the configuration of the present invention with reference to the accompanying drawings, Figure 1 is a sequence diagram showing an aluminum die-casting surface treatment technique according to the present invention.

본 발명에 따른 알루미늄-다이캐스팅 표면처리 기법은, 알루미늄-다이캐스팅을 수행하는 주조 단계(100)와, 이 주조 단계(100)에서 발생한 버(Burr)와 같은 돌출부를 제거하기 위한 표면 연마 단계(200)와, 상기 주조 단계(100)에서 발생한 규소, 이형제, 금속 슬러지 및 표면 부상물과 같은 이물질을 제거하도록, 이 이물질을 표면위로 부상 유도하기 위해, 1초 내지 20분, 350~450℃에서 열처리하는 열처리 단계(300)와, 상기 열처리 단계(300)에서 표면 위로 부상 유도된 이물질을 물의 낙차에 의해 1초 내지 30분, 1~50℃로 분리하는 제1 수세척 단계(400)와, 모서리가 있는 자갈과 같은 연마용 컴파운드를 소재와 같이 넣고 장비에 진동과 회전을 동시에 주어 소재의 표면을 중간 절삭 및 연마하는 바렐 연삭/연마 단계(500)와, 상기 바렐 연삭/연마 단계(500)를 거친 알루미늄 다이캐스팅 대상물을 양극산화처리(anodizing)하는 아노다이징 단계(600)와, 상기 아노다이징 단계(600)를 거친 알 루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제2 수세척 단계(700)와, 상기 아노다이징 공정(600)에서 생성된 미세한 포어(pores) 속에 염료를 채우는 염료 착색 단계(800)와, 상기 염료 착색 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제3 수세척 단계(900)와, 상기 염료 착색 단계(800)에서 착색된 포어를 니켈 아세테이트, 암모니아 및 스팀으로 봉공하는 표면 봉공 단계(1000)와, 상기 표면 봉공 단계(1000)를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제4 수세척 단계(1100)와, 이 수세척 단계(1100)를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 30분, 10~150℃에서 열풍 건조하는 건조 단계(1200)로 이루어진다.The aluminum die casting surface treatment technique according to the present invention includes a casting step 100 for performing aluminum die casting, and a surface polishing step 200 for removing protrusions such as burrs generated in the casting step 100. And, in order to remove the foreign matter such as silicon, release agent, metal sludge and surface flotation generated in the casting step 100, in order to induce the foreign matter floating on the surface, 1 second to 20 minutes, heat treatment at 350 ~ 450 ℃ Heat treatment step 300, and the first water washing step 400 for separating the foreign matter induced on the surface in the heat treatment step 300 in 1 seconds to 30 minutes, 1 ~ 50 ℃ by the drop of water, and the edges Barrel grinding / polishing step (500) and the barrel grinding / polishing step (500) for intermediate cutting and polishing the surface of the material by putting the polishing compound, such as gravel with the material together with the vibration and rotation to the equipment at the same time aluminum Anodizing step 600 for anodizing a die casting object, and a second water washing step for washing the aluminum die casting object passed through the anodizing step 600 at 1 to 20 minutes at 1 to 30 ° C. 700), a dye coloring step 800 of filling a dye into fine pores generated in the anodizing process 600, and an aluminum die casting object subjected to the dye coloring step for 1 minute to 20 minutes, 1 to 30 ° C. A third water washing step (900) for washing with water, a surface sealing step (1000) for sealing the pores colored in the dye coloring step (800) with nickel acetate, ammonia and steam, and the surface sealing step (1000) 1 to 20 minutes, the fourth water washing step (1100) for washing the aluminum die-casting object passed through the water washing step (1100) for 1 minute to 20 minutes, 1 minute to 30 minutes, 10 Heat at ~ 150 ℃ It comprises a drying step of drying 1200.

이로써, 기존에 다이캐스팅 소재가 규소와 금속 슬러지, 이형제 등에 의해 표면처리가 불가능해지는 문제점을 해소할 수 있게 되었다.As a result, it is possible to solve the problem that the die-casting material cannot be surface-treated by silicon, metal sludge, and a release agent.

여기에서, 상기 염료 착색 단계에서는 다이캐스팅 소재에 유입되도록 물과 유무기염료를 침전시킨 상태에서 다이캐스팅 포어에 염료가 투입되도록 처리하게 된다. Here, in the dye coloring step, the dye is injected into the die casting pore in a state in which water and inorganic dyes are precipitated to flow into the die casting material.

상기 염료 착색 단계를 거친 소재는 수세척 단계를 거친 후, 표면봉공 단계를 거치게 되는 데, 이는 깨끗하고도 안정적인 표면을 획득하기 위함이다.After the dye coloring step, the material is subjected to a water washing step and then subjected to a surface sealing step, in order to obtain a clean and stable surface.

물론, 상기 모든 단계에서는, 각 단계에서 전달되는 소재를 안정적으로 침지시키는 수용조들 내에서 이루어지는 것이다.Of course, in all the above steps, it is made in the receiving tank for stably immersing the material delivered in each step.

또한, 상기 수세척 단계 및 열풍 건조 단계에서는 질소분위기에서 소재를 세척에 적당한 온도로 승온한 후 수세하는 처리를 수행함이 바람직하다.In addition, in the water washing step and the hot air drying step, it is preferable to perform a treatment in which the material is heated to a temperature suitable for washing in a nitrogen atmosphere and then washed with water.

즉, 기계적 강도와 탄성계수를 증가시켜 상기 알루미늄-다이캐스팅 주조는 알루미늄이나 알루미늄 합금을 250℃ 잉코트에 투입하고 10분 후, 이송 콘베어를 이용하여 250℃, 350℃, 550℃, 650℃, 780℃로 구성되는 전기가열로에 순차적으로 가열시킨 후 수행하게 되는 것이다. That is, by increasing mechanical strength and modulus of elasticity, the aluminum die-casting casting is performed after 10 minutes of injecting aluminum or aluminum alloy into a 250 ° C. ingot, and then using a conveying conveyor at 250 ° C., 350 ° C., 550 ° C., 650 ° C., and 780. It is to be carried out after sequentially heating the electric heating consisting of ℃.

또한, 상기 열처리 단계(300)에서는 부산물이 혼입되지 않고 유동하게 됨과 아울러, 전체적인 공정을 거침으로써, 조직미세화와 경도가 향상되며, 재질분포도가 향상되고, 이물질이 제거된 양질의 표면처리 소재를 획득할 수 있게 되는 것이다.In addition, in the heat treatment step 300, by-products are not mixed and flow, and by going through the whole process, the structure fineness and hardness is improved, the material distribution is improved, to obtain a good surface treatment material from which foreign substances are removed You can do it.

상기한 염료 착색 단계에서는, 양극산화방법으로 미세 포어 내에 도료를 채워 도색되도록 하는 공정을 수행한다.In the dye coloring step described above, a process is performed in which the paint is filled into the fine pores by an anodizing method.

이로써, 색상을 오랜 기간 유지시킬 수 있음과 동시에, 고유성을 갖게 되는 것이다. 이러한 도색방법은 양극산화처리(anodizing) 공정에서 미세한 구멍을 만들도록 하여 그 속에 염료를 채우는 방식인데 이에 의한 도색은 변색은 물론 탈색의 염려도 없게 되는 것이다.As a result, the color can be maintained for a long time and have uniqueness. Such a painting method is to fill a dye in the anodizing process to make fine pores, so that the painting is not discolored or discolored.

또한, 상기 도색을 양극도금방식으로 도장하는 관계로 색상이 땀이나 대기 등의 상황으로 변색되거나 탈색되지 않으며 가벼워 휴대폰 케이스 등과 같은 제품에서에서 요구하는 물리적인 특성을 확보 달성하게 되는 것이다.In addition, since the painting is coated by the anodizing method, the color does not discolor or decolorize due to sweat or atmosphere, and is light, thereby achieving physical properties required by a product such as a mobile phone case.

이로써, 가볍고 우아하며 탈색과 변색이 없는 소재의 대체에 의해 사용자의 품위와 변하지 않는 제품의 외상을 우려할 필요 없이 사용이 가능하게 됨은 물론이고, 최근의 고유가로 고분자업계의 고민을 덜어주고 정전기 등을 유발하는 플라스 틱제품을 추방할 수 있음과 동시에, 디자인은 물론 색상의 변화도 자유자재로 선택할 수 있게 되는 것이다.This makes it possible to use the product without worrying about the user's dignity and the trauma of the product that does not change by replacing the material which is light, elegant and without discoloration and discoloration. At the same time, it is possible to expel plastic products, which can cause problems, as well as design and color variations.

이상에서 실시예를 들어 본 발명을 더욱 상세하게 설명하였으나, 본 발명은 반드시 이러한 실시예로 국한되는 것은 아니고, 본 발명의 기술사상을 벗어나지 않는 범위 내에서 다양하게 변형실시될 수 있다. 따라서 본 발명에 개시된 실시예들은 본 발명의 기술적 사상을 한정하기 위한 것이 아니라 설명하기 위한 것이고, 이러한 실시예에 의하여 본 발명의 기술적 사상의 범위가 한정되는 것은 아니다. 본 발명의 보호범위는 청구범위에 의하여 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술적 사상은 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.Although the present invention has been described in more detail with reference to the examples, the present invention is not necessarily limited to these embodiments, and various modifications can be made without departing from the spirit of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

도 1은 본 발명에 따른 알루미늄-다이캐스팅 표면처리 기법을 나타낸 순차도. 1 is a sequence diagram illustrating an aluminum die casting surface treatment technique according to the present invention.

※ 도면의 주요부분에 대한 부호의 설명. ※ Explanation of symbols for main part of drawing.

100 : 주조 단계,100: casting step,

200 : 표면 연마 단계,200: surface polishing step,

300 : 열처리 단계, 300: heat treatment step,

400 : 제1 수세척 단계,400: first washing step,

500 : 바렐 연삭/연마 단계,500: barrel grinding / polishing stage,

600 : 아노다이징 단계,600: anodizing step,

700 : 제2 수세척 단계,700: second washing step,

800 : 염료 착색 단계,800: dye coloring step,

900 : 제3 수세척 단계,900: third washing step,

1000 : 표면 봉공 단계,1000: surface sealing step,

1100 : 제4 수세척 단계,1100: fourth wash step,

1200 : 건조 단계,1200: drying step,

Claims (1)

알루미늄-다이캐스팅을 수행하는 주조 단계와, 이 주조 단계에서 발생한 버(Burr)와 같은 돌출부를 제거하기 위한 표면 연마 단계와, 상기 주조 단계에서 발생한 규소, 이형제, 금속 슬러지 및 표면 부상물과 같은 이물질을 제거하도록, 이 이물질을 표면위로 부상 유도하기 위해, 1초 내지 20분, 350~450℃에서 열처리하는 열처리 단계와, 상기 열처리 단계에서 표면 위로 부상 유도된 이물질을 물의 낙차에 의해 1초 내지 30분, 1~50℃로 분리하는 제1 수세척 단계와, 모서리가 있는 자갈과 같은 연마용 컴파운드를 소재와 같이 넣고 장비에 진동과 회전을 동시에 주어 소재의 표면을 중간 절삭 및 연마하는 바렐 연삭/연마 단계와, 상기 바렐 연삭/연마 단계를 거친 알루미늄 다이캐스팅 대상물을 양극산화처리(anodizing)하는 아노다이징 단계와, 상기 아노다이징 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제2 수세척 단계와, 상기 아노다이징 공정에서 생성된 미세한 포어(pores) 속에 염료를 채우는 염료 착색 단계와, 상기 염료 착색 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제3 수세척 단계와, 상기 염료 착색 단계에서 착색된 포어를 니켈 아세테이트, 암모니아 및 스팀으로 봉공하는 표면 봉공 단계와, 상기 표면 봉공 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 20분, 1~30℃에서 수세척하는 제4 수세척 단계와, 이 수세척 단계를 거친 알루미늄 다이캐스팅 대상물을 1분 내지 30분, 10~150℃에서 열풍 건조하는 건조 단계를 포함하여 이루어진 것을 특징으로 하는 알루미 늄-다이캐스팅 소재 표면처리 방법.A casting step for performing aluminum die casting, a surface grinding step for removing protrusions such as burrs generated in the casting step, and foreign substances such as silicon, a release agent, metal sludge and surface flotations generated in the casting step. In order to remove the foreign matter on the surface, to remove the foreign matter, 1 second to 20 minutes, heat treatment step of heat treatment at 350 ~ 450 ℃, and foreign matter induced on the surface in the heat treatment step 1 second to 30 minutes by drop of water Barrel grinding / polishing for intermediate cutting and polishing of the surface of the material by putting the first water washing step of separating at 1 ~ 50 ° C and the polishing compound such as the cornered gravel as the material together and vibrating and rotating the equipment at the same time And anodizing the anodized aluminum diecasting object subjected to the barrel grinding / polishing step, and the anodizing stage. A second water washing step of washing the aluminum die-casting object passed through the system at 1 to 20 ° C. at 1 to 30 ° C., a dye coloring step of filling a dye into fine pores produced in the anodizing process, and the dye The third water washing step of washing the aluminum die casting object subjected to the coloring step at 1 to 20 minutes at 1 to 30 ° C., and the surface sealing step of sealing the pores colored in the dye coloring step with nickel acetate, ammonia, and steam. And a fourth water washing step of washing the aluminum die casting object subjected to the surface sealing step at 1 to 20 minutes and water at 1 to 30 ° C., and the aluminum die casting object undergoing this water washing step to 1 minute to 30 minutes and 10 minutes. Aluminum-die casting material surface treatment method comprising a drying step of hot air drying at ~ 150 ℃.
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WO2019144491A1 (en) * 2018-01-23 2019-08-01 宁波沈鑫电子有限公司 Process for surface treatment of die-cast aluminum part
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US11330732B2 (en) 2017-01-26 2022-05-10 Samsung Electronics Co., Ltd. Housing, method for manufacturing housing, and electronic device comprising same
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