KR100756232B1 - Flux coating method for aluminium part - Google Patents

Flux coating method for aluminium part Download PDF

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KR100756232B1
KR100756232B1 KR1020060047340A KR20060047340A KR100756232B1 KR 100756232 B1 KR100756232 B1 KR 100756232B1 KR 1020060047340 A KR1020060047340 A KR 1020060047340A KR 20060047340 A KR20060047340 A KR 20060047340A KR 100756232 B1 KR100756232 B1 KR 100756232B1
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South Korea
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flux
water
adhesive
aluminum
soluble
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KR1020060047340A
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Korean (ko)
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한경환
신기철
박무규
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일심알맥스(주)
주식회사 제이씨
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
    • B23K35/0261—Rods, electrodes, wires
    • B23K35/0266—Rods, electrodes, wires flux-cored
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/404—Coated rods; Coated electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/14—Heat exchangers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/10—Aluminium or alloys thereof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A flux coating method which prevents the air pollution due to a flux-adhesive mixed solution, prevents the flux-adhesive mixed solution from harming the health of workers, and makes it not necessary to separately preheat an aluminum part and reduces production process and time by coating a flux on the extruded aluminum part at a high temperature after extruding the aluminum part is provided. A method of coating a flux on an aluminium part comprises: a first step of extruding an aluminum part(200) from an extruder(100); a second step of impregnating the aluminum part in a high temperature state with an aqueous flux-adhesive solution(220) containing a flux and a water-soluble adhesive right after performing the first step; and a third step of supplying compressed air onto a surface of the aluminum part coated with the aqueous flux-adhesive solution in the second step, thereby forming an uniform coating layer on the surface of the aluminum part. The method further comprises a fourth step of removing water from the coating layer formed on the surface of the aluminum part, thereby drying the coating layer. The aqueous flux-adhesive solution comprises 0.5 to 35 wt.% of a flux, 0.05 to 10 wt.% of a water-soluble adhesive, 1 wt.% or less of an antifoaming agent, and the balance of water and other inevitable impurities. The flux is at least one of potassium aluminum fluoride, potassium zinc fluoride and potassium silicon fluoride, and the water-soluble adhesive is at least one of a water-soluble polyvinyl alcohol, a water-soluble polyurethane resin and a water-soluble acryl resin.

Description

알루미늄재 부품에 플럭스를 코팅하는 방법 {Flux Coating Method for Aluminium Part}Flux coating method for aluminum part {Flux Coating Method for Aluminum Part}

도 1은 본 발명의 실시예에 따른 공정도.1 is a process diagram according to an embodiment of the present invention.

도 2는 본 발명의 혼합액 저장조의 또 다른 예를 나타낸 도.Figure 2 is a view showing another example of the mixed liquid storage tank of the present invention.

도 3은 본 발명의 건조로를 나타낸 도.3 is a view showing a drying furnace of the present invention.

** 도면의 주요 부분에 대한 부호설명 **** Explanation of Signs of Major Parts of Drawings **

100 : 압출기 200 : 알루미늄재 부품 220: 플럭스-접착제 수용액 Reference Signs List 100 extruder 200 aluminum component 220 flux-adhesive solution

300 : 혼합액 저장조 400 : 송풍처리부 300: mixed liquid storage tank 400: blowing treatment

본 발명은 알루미늄재 부품에 플럭스를 코팅하는 방법에 관한 것으로, 보다 상세하게는 응축기나 증발기와 같은 자동차용 열교환기에 사용되는 알루미늄재 튜브의 외면에 플럭스를 코팅하여 이후 튜브에 냉각 핀을 결합시키기 위한 브레이징작업시 별도의 플럭스 도포공정을 생략할 수 있도록 하기 위한 플럭스 코팅 방법에 관한 것이다.The present invention relates to a method of coating the flux on the aluminum component, and more particularly to the coating of the flux on the outer surface of the aluminum tube used in automotive heat exchangers such as condensers or evaporators to bond the cooling fins to the tube thereafter. The present invention relates to a flux coating method for allowing a separate flux coating process to be omitted during a brazing operation.

통상 응축기나 증발기와 같은 자동차용 열교환기에 사용되는 알루미늄재 튜브는 압출 성형된 후, 아연 용사 코팅을 선택적으로 실시하여 반제품으로 생산되게 된다. 이후, 스프레이 분사나 롤링 전사에 의해 플럭스를 코팅하고 다시 절단 등의 가공을 거친 후 냉각 핀 등을 튜브의 표면에 장착시킨 후 브레이징을 행하게 된다.Typically, aluminum tubes used in automotive heat exchangers, such as condensers and evaporators, are extruded and then selectively coated with zinc spray coating to be produced as semi-finished products. Thereafter, the flux is coated by spray spraying or rolling transfer, and after the cutting and the like are processed again, a cooling fin or the like is mounted on the surface of the tube and brazing is performed.

종래에는 플럭스를 코팅하기 위해, 아세톤이나 메틸에틸케톤과 같은 케톤류의 유기용제에 아크릴계 수지를 희석한 접착제와 플럭스를 혼합하여 제조한 플럭스-접착제 혼합액을 사용하였으며, 이러한 종래의 기술은 대한민국 공개특허 2004-16860호 및 대한민국 특허 제455721호에 개시되어 있다.Conventionally, in order to coat the flux, a flux-adhesive mixture prepared by mixing an adhesive diluted with an acrylic resin and a flux with a ketone-like organic solvent such as acetone or methyl ethyl ketone was used. -16860 and Korean Patent No. 455721.

상기와 같은 종래 기술은 휘발성이 강한 아세톤이나 메틸에틸케톤과 같은 케톤류의 유기용제를 사용한 상기 플럭스-접착제 혼합액을 압출 직후 또는 상온의 알루미늄 부품의 표면에 스프레이 분사하기 때문에 대기 중으로 휘발성이 강한 유기 용제가 증발하여 대기를 오염시키며 작업자의 건강에 악영향을 미치게 된다.In the prior art as described above, since the flux-adhesive mixture using the highly volatile acetone or ketones such as methyl ethyl ketone is sprayed onto the surface of an aluminum part immediately after extrusion or at room temperature, a highly volatile organic solvent is introduced into the atmosphere. Evaporation will pollute the air and adversely affect worker health.

또한 롤링 전사시에는 전사 롤이 부분적으로 함침되는 플럭스-접착제 혼합액 보관조에서 유기용제가 증발하게 되고, 따라서 유기용제에 의한 상기와 같은 오염 문제가 발생할 뿐 만 아니라 증발에 따라 플럭스-접착제 혼합액의 농도가 변하여 코팅층의 품질이 저하되는 문제점이 있었고, 롤링 전사시 고농도의 플럭스-접착제 혼합액을 사용하기 때문에 50~200℃의 열풍건조 및 압착롤링 공정이 추가로 필요하 여 생산공정이 길어지는 단점이 있었다.In addition, during the rolling transfer, the organic solvent is evaporated in the flux-adhesive mixture storage tank in which the transfer roll is partially impregnated, and thus, the contamination problem caused by the organic solvent not only occurs, but also the concentration of the flux-adhesive mixture upon evaporation. There was a problem that the quality of the coating layer was deteriorated due to the change, and since the high concentration of flux-adhesive mixture was used during rolling transfer, the hot air drying and compression rolling processes of 50-200 ° C. were additionally required, resulting in a long production process. .

또한 아크릴계 수지를 케톤류의 유기용제에 녹여 플럭스-접착제 혼합액을 제조하기 위해서는 약 2시간 가량 교반하는 과정이 필요하여 작업을 위한 준비시간이 과도하게 소요되는 단점이 있다.In addition, in order to prepare a flux-adhesive mixture by dissolving an acrylic resin in a ketone organic solvent, a process of stirring for about 2 hours is required, which requires excessive preparation time for the operation.

본 발명은 상기와 같은 종래 기술의 문제점을 해결하기 위해 안출된 것으로, The present invention has been made to solve the problems of the prior art as described above,

플럭스-접착제 혼합액으로부터의 대기오염을 방지하고, 작업자의 건강을 해치지 않도록 하며, 또한 압출 후 고온 상태에서 코팅을 행하기 때문에 별도의 알루미늄재 예열시간이 필요 없으며, 생산공정 및 시간을 단축할 수 있는 플럭스 코팅 방법을 제공하는 것을 그 목적으로 한다. It prevents air pollution from the flux-adhesive mixture, does not harm the health of the workers, and also performs coating at high temperature after extrusion, which eliminates the need for additional aluminum preheating time and shortens the production process and time. It is an object of the present invention to provide a flux coating method.

또한 플럭스-접착제 혼합액을 간단하게 준비할 수 있으며, 또한 별도의 롤링 전사 공정이 생략될 수 있는 플럭스의 코팅방법을 제공하는 것을 또 다른 목적으로 한다. It is also another object of the present invention to provide a flux coating method, in which a flux-adhesive mixture can be simply prepared and a separate rolling transfer process can be omitted.

상기와 같은 목적을 달성하기 위해 안출된 본 발명은,The present invention devised to achieve the above object,

알루미늄재 부품을 압출기로부터 압출하는 제 1 단계와;A first step of extruding the aluminum component from the extruder;

플럭스와 수용성 접착제를 포함하여 이루어진 플럭스-접착제 수용액에 상기 제 1 단계를 거친 직후 고온 상태의 알루미늄재 부품을 함침하는 제 2 단계와;A second step of impregnating an aluminum material component in a high temperature state immediately after the first step in an aqueous flux-adhesive solution comprising a flux and a water-soluble adhesive;

상기 제 2 단계에서 플럭스-접착제 수용액으로 코팅된 알루미늄재 부품의 표면에 압축공기를 공급하여 균일한 코팅면을 이루는 제 3 단계;를 포함하여 이루어진 것을 특징으로 한다.
또한 상기 1 단계는 알루미늄재 부품의 표면에 아연 용사코팅을 하는 단계로 대체될 수도 있다.And a third step of forming a uniform coating surface by supplying compressed air to the surface of the aluminum material component coated with the flux-adhesive aqueous solution in the second step.
In addition, the first step may be replaced by zinc spray coating on the surface of the aluminum component.

또한, 본 발명은 코팅층의 수분을 제거하기 위한 건조단계(제 4 단계)를 더 포함하는 것이 바람직하다. In addition, the present invention preferably further comprises a drying step (fourth step) to remove the moisture of the coating layer.

상기 플럭스-접착제 수용액은 플럭스 0.5~35중량%, 수용성 접착제 0.05~10중량%, 소포제 1%이하, 나머지는 물 및 기타 불가피한 불순물로 이루어진 것이 보다 바람직하다.The flux-adhesive aqueous solution is more preferably made of 0.5 to 35% by weight of flux, 0.05 to 10% by weight of water-soluble adhesive, 1% or less of antifoaming agent, and the rest of water and other unavoidable impurities.

상기 플럭스는 불화알루미늄칼륨, 불화아연칼륨, 불화실리콘칼륨 중 하나 이상을 사용하는 것이 바람직하다.The flux is preferably at least one of potassium aluminum fluoride, zinc potassium fluoride and potassium fluoride.

또한 상기 수용성 접착제는 수용성 폴리비닐알코올, 수용성 폴리우레탄 수지, 수용성 아크릴 수지 중 하나 이상을 사용하는 것이 바람직하다.In addition, the water-soluble adhesive is preferably used at least one of water-soluble polyvinyl alcohol, water-soluble polyurethane resin, water-soluble acrylic resin.

또한 상기 소포제는 실리콘계 소포제 또는 비실리콘계 소포제인 것이 보다 바람직하다. In addition, the antifoaming agent is more preferably a silicone antifoaming agent or a non-silicone antifoaming agent.

이하 본 발명을 그 실시예에 따라 도면을 참조하여 보다 상세하게 설명한다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

도 1은 본 발명의 플럭스 코팅방법의 공정도를 나타낸 것으로, 1 shows a process chart of the flux coating method of the present invention,

먼저 압출기(100)로부터 압출된 알루미늄재 부품(200)은 플럭스와 수용성 접착제를 포함하여 이루어진 플럭스-접착제 수용액(220)이 저장된 저장조(300)에 함침된다. 저장조(300)는 저장조 입구부(310) 및 저장조 출구부(320)를 구비하여 상기 알루미늄재 부품(200)이 공급되고 배출될 수 있도록 한 것으로, 상기 플럭스-접착제 수용액(220)은 상기 저장조 입구부(310) 및 저장조 출구부(320) 보다 수면이 높게 형성된다. 그래서, 플럭스-접착제 수용액(220)은 이러한 저장조 입구부(310) 및 저장조 출구부(320)를 통하여 저장조 밖으로 흘러 나오게 되는데, 흘러나온 플럭스-접착제 수용액(220)은 별도의 수집탱크(330)에 의해 수집되고, 수집된 플럭스-접착제 수용액(220)은 다시 펌프(340)에 의해 저장조(330)의 상부에 위치한 수용액 공급구(350)으로 공급되어 저장조(300)의 수위를 일정하게 유지하게 된다. First, the aluminum component 200 extruded from the extruder 100 is impregnated in the reservoir 300 in which the flux-adhesive aqueous solution 220 including the flux and the water-soluble adhesive is stored. The reservoir 300 has a reservoir inlet 310 and a reservoir outlet 320 so that the aluminum component 200 can be supplied and discharged, and the flux-adhesive aqueous solution 220 is the reservoir inlet. The water surface is formed higher than the portion 310 and the reservoir outlet 320. Thus, the flux-adhesive solution 220 flows out of the reservoir through the reservoir inlet 310 and the reservoir outlet 320, and the flux-adhesive solution 220 flows out into a separate collection tank 330. Collected by the flux-adhesive solution 220 is again supplied to the aqueous solution supply port 350 located in the upper portion of the reservoir 330 by the pump 340 to maintain a constant level of the reservoir 300 .

압출기(100)로 부터 압출된 알루미늄재 부품(200)은 대략 450℃정도의 온도를 가지고 있고, 압출된 알루미늄재 부품에 대하여 아연 용사코팅을 하는 경우에도 용사코팅 후의 알루미늄재 부품 역시 온도 역시 대략 450℃의 온도를 갖게 된다. 상기와 같이 고온으로 압출된 알루미늄재 부품은 상기 저장조(300)내의 플럭스-접착제 수용액(220)에 함침된다. 플럭스-접착제 수용액(220)은 고온의 알루미늄재 부품을 급냉시키는 한편, 고온의 알루미늄재 부품의 표면과 접촉하는 과정에서 플럭스가 알루미늄재 부품의 표면에 코팅되게 된다. 저장조(300)내의 플럭스-접착제 수용액(220)은 알루미늄재 부품을 냉각시키면서 흡수한 열에 의해 그 온도가 상승하지만, 상기 펌프(340)에 의해 계속 순환되며 상온의 공기 중에 노출되기 때문에 상온 정도의 용액으로 자연 냉각된다. 상기 저장조(300)내를 통과한 알루미늄재 부품은 저장조 출구부(320)에서 약 10~100℃정도의 온도를 가지는 경우 코팅 품질이 우수하였다. 이러한 알루미늄재 부품의 온도는 저장조(300) 내의 플럭스-접착제 수용액(220)의 온도 및 공급량을 조절함에 의해 용이하게 조절할 수 있다. The aluminum component 200 extruded from the extruder 100 has a temperature of about 450 ° C., and even when the zinc thermal spray coating is performed on the extruded aluminum component, the temperature of the aluminum component after the thermal spray coating is also about 450 degrees. It has a temperature of ℃. As described above, the aluminum component extruded at a high temperature is impregnated into the flux-adhesive aqueous solution 220 in the reservoir 300. The flux-adhesive aqueous solution 220 quenches the hot aluminum component while the flux is coated on the surface of the aluminum component while contacting the surface of the hot aluminum component. The flux-adhesive aqueous solution 220 in the reservoir 300 rises in temperature due to heat absorbed while cooling the aluminum component, but is circulated by the pump 340 and exposed to air at room temperature, so that the solution is at room temperature. As it is naturally cooled. The aluminum component that has passed through the reservoir 300 has excellent coating quality when the reservoir outlet portion 320 has a temperature of about 10 to 100 ° C. The temperature of the aluminum component can be easily controlled by adjusting the temperature and the supply amount of the flux-adhesive aqueous solution 220 in the reservoir 300.

본 실시예에서는 도 1의 저장조(300)를 사용하여 알루미늄재 부품(200)을 함침시켰으나, 도 2와 같이, 저장조(300)에 샤워기(360)를 설치하고 플럭스-접착제 수용액(220)을 샤워기(360)에 의해 알루미늄재 부품(200)의 표면에 분사하는 것도 가능하다.In this embodiment, the aluminum component 200 is impregnated using the reservoir 300 of FIG. 1, but as shown in FIG. 2, the shower 360 is installed in the reservoir 300 and the flux-adhesive aqueous solution 220 is showered. By 360, it is also possible to spray on the surface of the aluminum component 200.

본 발명에서 사용되는 플럭스-접착제 수용액(220)은 플럭스와 수용성 접착제를 포함하여 이루어진다.Flux-adhesive aqueous solution 220 used in the present invention comprises a flux and a water-soluble adhesive.

본 실시예의 플럭스-접착제 수용액(200)은 플럭스 0.5~35 중량%, 수용성 접착제 0.05~10 중량%, 소포제 1%이하, 및 나머지는 물과 기타 불가피한 불순물로 구성된 것이다.Flux-adhesive aqueous solution 200 of the present embodiment is 0.5 to 35% by weight flux, 0.05 to 10% by weight water-soluble adhesive, 1% or less antifoam, and the rest is composed of water and other unavoidable impurities.

본 실시예에서 사용한 플럭스는 KAlF4, K2AlF5·H20 , K3AlF6와 같은 불화알루미늄칼륨을 사용하였는데, 이러한 불화알루미늄칼륨의 경우 알루미늄재 부품의 표면에 형성되어 있는 산화알루미늄 피막을 제거하는데 효과적이며, 종래에도 이러한 효과는 알려져 있다.The flux used in this example was potassium aluminum fluoride such as KAlF 4 , K 2 AlF 5 · H 2 0, K 3 AlF 6, and in the case of such potassium aluminum fluoride, an aluminum oxide film formed on the surface of the aluminum component It is effective to eliminate the above, and this effect is known in the art.

또한 플럭스로서 KZnF3, K2ZnF4,K3ZnF5와 같은 불화아연칼륨을 사용하게 되면, 알루미늄재 부품 표면의 산화 알루미늄피막을 제거할 수 있을 뿐만 아니라, 아연용사공정을 생략할 수 있어 원가가 절감될 수 있다.In addition, if zinc fluoride such as KZnF 3 , K 2 ZnF 4 , K 3 ZnF 5 is used as the flux, not only the aluminum oxide film on the surface of the aluminum component can be removed, but also the zinc-spray process can be omitted. Can be reduced.

또한 플럭스로서 K2SiF6와 같은 불화실리콘칼륨을 사용하는 경우에는 산화알루미늄 피막을 제거할 수 있을 뿐만 아니라, 클래드(Clad)재 없이도 브레이징이 가능한 것도 알려져 있다. In addition, when potassium silicon fluoride, such as K 2 SiF 6 , is used as the flux, not only the aluminum oxide film can be removed, but also brazing is possible without a clad material.

본 발명은 상기와 같은 불화알루미늄칼륨, 불화아연칼륨, 불화실리콘칼륨 중 어느 것을 사용하여도 동일한 효과를 얻을 수 있으며, 이를 섞어서 사용하는 것도 가능하다.The present invention can obtain the same effect by using any of the above-described potassium aluminum fluoride, zinc potassium fluoride, potassium fluoride potassium, it is also possible to use a mixture thereof.

본 발명의 플럭스는 0.5~35중량%를 첨가하는 것이 바람직한데, 플럭스가 0.5중량%보다 작게 첨가되면, 브레이징 공정시 산화알루미늄 피막이 잘 제거되지 않아 브레이징에 의한 접합효율이 저하되며, 플럭스가 35중량%이상 첨가되면 플럭스가 알루미늄재의 표면에 부착되는 것이 양호하지 않게 되며 브레이징 작업시 과도한 플럭스에 의해 효율이 저하되게 된다The flux of the present invention is preferably added 0.5 to 35% by weight, if the flux is less than 0.5% by weight, the aluminum oxide film is not removed well during the brazing process, the bonding efficiency due to brazing is reduced, the flux is 35% by weight If more than% is added, it is not good for the flux to adhere to the surface of the aluminum material and the efficiency decreases due to excessive flux during brazing operation.

본 실시예에서 사용한 수용성 접착제는 수용성 폴리비닐알코올인데, 수용성 폴리비닐알코올 대신 수용성 폴리우레탄 수지, 수용성 아크릴 수지 를 사용하는 것도 가능하며, 이를 섞어서 사용하는 것도 가능하다. 이러한 수용성 접착제는 0.05~10중량%로 첨가하는 것이 바람직한데, 0.05중량% 이하로 첨가하게 되면 플럭스가 알루미늄재 부품에 접착되는 접착효율이 낮아지며, 10중량%이상에서는 코팅층이 지나치게 두꺼워지며 또한 코팅층에 접착제 성분이 많이 잔류하는 관계로 브레이징시 작업효율이 낮아지는 문제점이 발생한다. The water-soluble adhesive used in this embodiment is a water-soluble polyvinyl alcohol, it is also possible to use a water-soluble polyurethane resin, water-soluble acrylic resin instead of water-soluble polyvinyl alcohol, it is also possible to use a mixture thereof. It is preferable to add such a water-soluble adhesive at 0.05 to 10% by weight, but when it is added at 0.05% by weight or less, the adhesion efficiency of the flux adhering to the aluminum material becomes low. At 10% by weight or more, the coating layer is too thick and the coating layer Since a large amount of adhesive components remain, there is a problem in that work efficiency is lowered during brazing.

또한 본 실시예에서는 소포제로 실리콘계 소포제를 1%이하 첨가하여 사용하였는데, 소포제를 1%보다 더 많이 첨가하게 되면 소포제의 계면활성에 의해 플럭스가 알루미늄재 부품 표면에 잘 부착되지 않는 문제점이 발생한다.In addition, in the present embodiment, the antifoaming agent was used by adding 1% or less of the silicone-based antifoaming agent. When the antifoaming agent is added more than 1%, the flux does not adhere well to the surface of the aluminum component due to the surface activity of the antifoaming agent.

상기와 같은 플럭스, 수용성 접착제, 소포제를 물에 섞어 플럭스-접착제 수용액(220)을 제조하는 경우에는, 특별한 교반작업 없이도 물에 잘 녹아 준비시간이 단축될 수 있다.In the case of preparing the flux-adhesive aqueous solution 220 by mixing the flux, the water-soluble adhesive, and the antifoaming agent as described above, the preparation time may be shortened by dissolving well in water without special stirring.

저장조(300)를 통과한 알루미늄재 부품(200)의 표면에는 상기 플럭스-접착제 수용액(220)에 의해 플럭스가 코팅되어 있으며, 일부 구간은 산화막의 요철 및 플럭스-접착제 수용액(220)의 자체 표면장력 등에 의해 불균일한 도포상태를 보일 수 있다. 이를 제거하기 위해 알루미늄재 부품의 표면에 상온의 압축공기를 공급하는 송풍처리부(400)에 진입하게 된다.Flux is coated on the surface of the aluminum component 200 passing through the reservoir 300 by the flux-adhesive aqueous solution 220, and some sections have their own surface tension of the irregularities of the oxide film and the flux-adhesive aqueous solution 220. Uneven coating state may be exhibited by the or the like. In order to remove this, it enters the blowing treatment unit 400 for supplying compressed air at room temperature to the surface of the aluminum component.

송풍처리부(400)는 모터(430)에 의해 회전하는 팬(440)에 의해 알루미늄재 부품의 표면에 압축공기를 공급하게 되는데, 알루미늄재 부품의 표면에서 약 3~5kg/cm2의 풍압이 작용하도록 하는 것이 바람직하다. 풍압이 3kg/cm2보다 낮으면 알루미늄재 부품 표면에 존재하는 플럭스-접착제 수용액(220)이 균일하게 확산되지 못하고, 풍압이 5kg/cm2보다 높으면 플럭스-접착제 수용액(220)이 알루미늄재 부품(200)의 표면에서 떨어져 날아가 버리게 된다. 송풍처리부(400)을 거친 알루미늄재 부품(200)의 표면에는 플럭스가 균일하게 코팅되게 되고, 코팅이 완료된 알루미늄재 부품은 이후 알루미늄재 부품(200)을 권취되거나 절단하는 후공정으로 공급되게 된다.The blowing treatment unit 400 supplies the compressed air to the surface of the aluminum component by the fan 440 rotated by the motor 430, the wind pressure of about 3 ~ 5kg / cm 2 acts on the surface of the aluminum component It is desirable to. If the wind pressure is less than 3kg / cm 2 flux-adhesive aqueous solution 220 present on the surface of the aluminum component is not uniformly spread, if the wind pressure is higher than 5kg / cm 2 flux-adhesive aqueous solution 220 is the aluminum component ( It is blown away from the surface of 200). Flux is uniformly coated on the surface of the aluminum component 200 that has passed through the air blowing treatment unit 400, and the coated aluminum component is then supplied to a post process of winding or cutting the aluminum component 200.

본 발명에서는 플럭스-접착제 수용액(220)을 사용하였기 때문에, 코팅층의 일부가 덜 건조되면 코팅층이 박리될 수 있다.. 이를 방지하기 위해 상기 송풍처리부(400)을 지나온 알루미늄재 부품(200)을 약 100~150℃의 온도 분위기를 갖도록 히터(520)가 구비된 도 3과 같은 건조로(500)로 통과시켜 습기를 제거하는 것도 바람직하다. In the present invention, since the flux-adhesive aqueous solution 220 is used, when the part of the coating layer is less dry, the coating layer may be peeled off. In order to prevent this, the aluminum part 200 passing through the air blowing unit 400 may be weakened. It is also preferable to remove moisture by passing through a drying furnace 500 as shown in Figure 3 equipped with a heater 520 to have a temperature atmosphere of 100 ~ 150 ℃.

본 발명은, 휘발성이 없는 플럭스-접착제 수용액을 사용함에 따라 대기오염을 방지하고, 작업자의 건강을 해치지 않을 수 있고, 압출 후 고온 상태에서 코팅이 시작되기 때문에 별도의 예열시간이 필요 없고, 생산공정 및 시간을 단축할 수 있는 효과가 있다. The present invention, by using a non-volatile flux-adhesive aqueous solution to prevent air pollution, may not harm the health of the operator, and does not require a separate preheating time because the coating is started in a high temperature state after extrusion, production process And there is an effect that can shorten the time.

또한 플럭스-접착제 수용액의 준비가 간단하며, 별도의 롤링 전사 공정이 없이도 우수한 품질의 코팅층이 형성된 알루미늄재 부품을 생산할 수 있는 효과가 있다.In addition, the preparation of the flux-adhesive aqueous solution is simple, and there is an effect of producing an aluminum material component having a coating layer of excellent quality without a separate rolling transfer process.

Claims (5)

알루미늄재 부품을 압출기로부터 압출하는 제 1 단계와;A first step of extruding the aluminum component from the extruder; 플럭스와 수용성 접착제를 포함하여 이루어진 플럭스-접착제 수용액에 상기 제 1 단계를 거친 직후 고온 상태의 알루미늄재 부품을 함침하는 제 2 단계와;A second step of impregnating an aluminum material component in a high temperature state immediately after the first step in an aqueous flux-adhesive solution comprising a flux and a water-soluble adhesive; 상기 제 2 단계에서 플럭스-접착제 수용액으로 코팅된 알루미늄재 부품의 표면에 압축공기를 공급하여 균일한 코팅면을 이루는 제 3 단계;를 포함하여 이루어진 것을 특징으로 하는 알루미늄재 부품에 플럭스를 코팅하는 방법.A third step of forming a uniform coating surface by supplying compressed air to the surface of the aluminum material part coated with the flux-adhesive aqueous solution in the second step; forming a flux on the aluminum material part comprising a . 알루미늄재 부품의 표면에 아연 용사코팅을 하는 제 1 단계와;A first step of zinc coating the surface of the aluminum component; 플럭스와 수용성 접착제를 포함하여 이루어진 플럭스-접착제 수용액에 상기 제 1 단계를 거친 직후 고온 상태의 알루미늄재 부품을 함침하는 제 2 단계와;A second step of impregnating an aluminum material component in a high temperature state immediately after the first step in an aqueous flux-adhesive solution comprising a flux and a water-soluble adhesive; 상기 제 2 단계에서 플럭스-접착제 수용액으로 코팅된 알루미늄재 부품의 표면에 압축공기를 공급하여 균일한 코팅면을 이루는 제 3 단계;를 포함하여 이루어진 것을 특징으로 하는 알루미늄재 부품에 플럭스를 코팅하는 방법.A third step of forming a uniform coating surface by supplying compressed air to the surface of the aluminum material part coated with the flux-adhesive aqueous solution in the second step; forming a flux on the aluminum material part comprising a . 제 1 항 또는 제 2 항에 있어서, 상기 알루미늄재 부품의 표면에 형성된 코팅층의 수분을 제거하여 건조시키는 제 4 단계을 더 포함하는 것을 특징으로 하는 알루미늄재 부품에 플럭스를 코팅하는 방법.3. The method of claim 1 or 2, further comprising a fourth step of removing and drying the moisture of the coating layer formed on the surface of the aluminum component. 제 1 항 또는 제 2 항에 있어서, 상기 플럭스-접착제 수용액은 플럭스 0.5~35중량%, 수용성 접착제 0.05~10중량%, 소포제 1%이하, 나머지는 물 및 기타 불가피한 불순물로 이루어진 것을 특징으로 하는 알루미늄재 부품에 플럭스를 코팅하는 방법.[Claim 3] The aluminum according to claim 1 or 2, wherein the flux-adhesive aqueous solution is 0.5 to 35% by weight of flux, 0.05 to 10% by weight of water-soluble adhesive, 1% or less of antifoaming agent, and the remainder is made of water and other unavoidable impurities. How to coat the flux on the ash parts. 제 4 항에 있어서, 상기 플럭스는 불화알루미늄 칼륨, 불화아연칼륨, 불화실리콘칼륨 중 하나 이상을 사용하는 것이며, 상기 수용성 접착제는 수용성 폴리비닐알코올, 수용성 폴리우레탄 수지, 수용성 아크릴 수지 중 하나 이상을 사용하는 것을 특징으로 하는 알루미늄재 부품에 플럭스를 코팅하는 방법.The method of claim 4, wherein the flux is one or more of aluminum potassium fluoride, zinc potassium fluoride, potassium silicon fluoride, and the water-soluble adhesive is one or more of water-soluble polyvinyl alcohol, water-soluble polyurethane resin, water-soluble acrylic resin. A method of coating the flux on the aluminum material, characterized in that.
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