KR20000030559A - An electropainting method using a powder melting type - Google Patents

An electropainting method using a powder melting type Download PDF

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Publication number
KR20000030559A
KR20000030559A KR1020000011255A KR20000011255A KR20000030559A KR 20000030559 A KR20000030559 A KR 20000030559A KR 1020000011255 A KR1020000011255 A KR 1020000011255A KR 20000011255 A KR20000011255 A KR 20000011255A KR 20000030559 A KR20000030559 A KR 20000030559A
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South Korea
Prior art keywords
coating
workpiece
melting
powder
paint powder
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KR1020000011255A
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Korean (ko)
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정형동
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정형동
주식회사 씨솔루션
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Priority to KR1020000011255A priority Critical patent/KR20000030559A/en
Publication of KR20000030559A publication Critical patent/KR20000030559A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
    • B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
    • B05D1/06—Applying particulate materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/002—Pretreatement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0218—Pretreatment, e.g. heating the substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2350/00—Pretreatment of the substrate
    • B05D2350/10—Phosphatation

Abstract

PURPOSE: A method for electron coating by melting paint powder is provided to improve the reliability since various colors are exhibited and very fine crevices are completely painted at a low cost by melting paint powder on the workpiece, and to increase the productivity by performing the painting for a large quantity of workpieces simultaneously. CONSTITUTION: A method for electron coating by melting paint powder includes the steps of pre-processing for removing impurities from the surfaces of a workpiece through phosphate zinc film coating process, first dehydrating the workpiece by an air blower, second dehydrating and drying the workpiece already dehydrated by the air blower and automatically supplied by an automatic feeding hopper again in an oven dryer, and painting the workpiece by preheating the dehydrated and dried workpiece at about 120°C, coating paint powder on the surface of the workpiece by using centrifugal force, and melting the paint powder on the surface of the workpiece to form a thin film having a uniform thickness in a heating zone of C-type circulation structure.

Description

분체용융방식을 이용한 전착도장방법{An electropainting method using a powder melting type}An electropainting method using a powder melting type

본 발명은 분체용융방식을 이용한 전착도장방법에 관한 것으로, 더욱 상세하게는 일련의 공정중 분체도장기법이 적용되어 다양한 색상연출이 가능하면서 유지관리비가 적게들고, 용융방식에 의해 대량의 도장대상물을 동시에 투입 분리함으로서 도장공정의 단축 및 생산성이 향상되도록 하는 한편, 전착도장기법에 의해 미세한 틈새로도 도장이 가능하도록 하는 분체용융방식을 이용한 전착도장방법에 관한 것이다.The present invention relates to an electrodeposition coating method using a powder melting method, and more particularly, by applying a powder coating method in a series of processes, it is possible to produce a variety of colors, while maintaining a low maintenance cost, a large amount of coating objects by the melting method The present invention relates to an electrodeposition coating method using a powder melting method that allows the coating process to be shortened and productivity is improved by the separation of the input, and the coating is possible even with a small gap by the electrodeposition coating technique.

일반적으로 각종 제품의 표면을 대량으로 도장하기 위한 방법은 다양하지만 그 대표적인 것으로 액전정전도장이나 분체도장, 그리고 전착도장등으로 구분 할 수 있다.In general, there are various methods for painting the surface of various products in large quantities, but the representative ones can be divided into liquid electrostatic coating, powder coating, and electrodeposition coating.

그 중에서 전자의 경우인 액전정전도장이나 분체도장은 분무기로 도료를 분출하고 무화상태로 된 미립자를 정전 유도작용으로 대전(帶電)시킴으로서 생기는 흡인력으로 공작물의 표면에 흡착시키는 방법으로 이는 도장면에 기포가 발생되지 않으며 균일하다는 장점이 있다.Among them, liquid electrostatic coating or powder coating, which is the former case, is a method of adsorbing the surface of the workpiece by the suction force generated by spraying the paint with a sprayer and charging the atomized fine particles by electrostatic induction. Does not occur and is uniform.

그러나 상기 액전정전도장이나 분체도장은 도장의 대상물이 복잡하게 구성되어 있는 경우 그 각각의 미세틈새로는 반발력의 작용으로 도료가 침투되지 않게 되고 또한, 도장대상물을 행거에 일일히 걸어주어야 함으로서 예컨데 소형의 기계부품을 도장하는 경우에는 그 생산성 및 작업성이 저하된다는 문제가 있으며, 아울러 다양한 색상연출과 손실된 도료(손실율 약 10 %)를 수거하기가 곤란한 문제가 있다.However, the liquid electrostatic coating or the powder coating has a complicated composition, so that the micro-gap does not penetrate the paint due to the action of repulsive force. In the case of painting the mechanical parts, there is a problem that the productivity and workability is lowered, and in addition, there is a problem that it is difficult to collect various color production and lost paint (loss rate about 10%).

또한, 전착도장은 전기 영동도장을 말하며 이는 도료,금속분말,내열분말등의 콜로이드물질을 전도성용액 속에 현탁(懸濁)시켜 전기를 통하면 콜로이드가 전극에 석출하여 전극의 금속표면을 피복하는 도금법으로 이는 수성페인트, 수용성수지를 전해욕으로 하여 자동차의 차체나 부품에 영동전착(永動電着)을 주로 하고 있다.In addition, electrodeposition coating refers to electrophoretic coating, which is a plating method in which colloidal materials such as paints, metal powders, and heat-resistant powders are suspended in a conductive solution, and the colloid precipitates on the electrode to coat the metal surface of the electrode. As an electrolytic bath, water-based paints and water-soluble resins are mainly used for electrophoretic deposition on automobile bodies and parts.

그러나 상기 전착도장은 정전도장법보다 피복능력이 높고 도막이 균일하며 건조가 용이하고 도료의 손실이 없다는 장점이 있으나 이는 그 설비가 복잡하여 대형도장설비에 적합하여 중소형의 도장설비로는 적합치 않다는 문제가 있다.However, the electrodeposition coating has the advantages of higher coating capacity, more uniform coating, easier drying and no loss of paint than the electrostatic coating method. However, the electrodeposition coating has a problem that it is not suitable as a small and medium coating equipment due to its complicated equipment. .

이에 본 발명은 상기의 제반문제점을 해소시키기 위해 안출된 것으로, 본 발명은 일련의 공정중 분체도장기법이 적용되어 다양한 색상연출이 가능하면서 유지관리비가 적게들고, 용융방식에 의해 대량의 도장대상물을 동시에 투입 분리함으로서 도장공정의 단축 및 생산성이 향상되도록 하는 한편, 전착도장기법에 의해 미세한 틈새로도 도장이 가능하도록 하여 제품의 신뢰성을 높일수 있도록 하는 분체용융방식을 이용한 전착도장방법을 제공하는데 그 목적이 있는 것이다.Accordingly, the present invention has been made to solve the above problems, the present invention is applied to a series of powder coating techniques in a series of processes, it is possible to produce a variety of colors while maintaining a low maintenance cost, a large amount of coating objects by the melting method At the same time, it is possible to provide an electrodeposition coating method using a powder melting method to improve the reliability of the product by shortening the coating process and improving productivity by simultaneously separating and inserting the coating, and allowing the coating to be made even through minute gaps by the electrodeposition coating technique. Is there.

상기의 목적을 달성시키기 위한 본 발명에 따른 분체용융방식을 이용한 전착도장방법은, 도장대상물의 표면에 뭍은 이물질을 인산아연피막 공정을 통하여 제거하기 위한 전처리공정과; 상기 전처리공정을 통하여 표면의 이물질이 제거되어진 도장대상물을 에어블로우를 통하여 1차 탈수시키는 공정과; 상기 1차탈수공정을 거친 도장대상물을 자동공급시켜 오븐드라이를 통하여 2차탈수 및 건조시키는 공정과; 상기의 공정을 통하여 탈수 및 건조되어진 도장대상물을 예열하고 원심력을 이용하여분체도료를 표면에 입히고 용융.전착방식으로 표면에 뭍은 도료를 용융시키는 방식으로 도막을 형성시키는 도장공정을 포함하는 것을 특징으로 한다.Electrodeposition coating method using the powder melting method according to the present invention for achieving the above object, the pre-treatment step for removing the foreign matter that has been deposited on the surface of the coating object through a zinc phosphate coating process; Primary dewatering of the coating object from which the foreign matter on the surface is removed through the pretreatment process through an air blow; A step of automatically supplying a coating object having undergone the first dehydration step and dehydrating and drying it through an oven dry; And a coating process of preheating the dehydrated and dried coating object through the above process, coating the powder coating on the surface using centrifugal force, and forming a coating film by melting the paint spreading on the surface by melting and electrodeposition. It is done.

도 1 - 본 발명에 따른 분체용융방식을 이용한 전착도장방법을 설명하기 위한 도장설비의 전체구성도,1-overall configuration of the coating equipment for explaining the electrodeposition coating method using a powder melting method according to the present invention,

도 2 - 본 발명에 따른 전착도장방법에 적용되어진 분체용융 전착도장기의 계략도이다.2 is a schematic view of a powder melt electrodeposition coating machine applied to the electrodeposition coating method according to the present invention.

이하, 본 발명에 따른 분체용융방식을 이용한 전착도장방법을 첨부된 도면에 의거하여 상세히 설명한다.Hereinafter, the electrodeposition coating method using the powder melting method according to the present invention will be described in detail with reference to the accompanying drawings.

도 1 은 본 발명에 따른 분체용융방식을 이용한 전착도장방법을 설명하기 위한 도장설비의 전체구성도이다.1 is an overall configuration of the coating equipment for explaining the electrodeposition coating method using a powder melting method according to the present invention.

상기 도면에 도시된 바와같이 본 발명은, 도장대상물의 표면에 뭍은 이물질을 인산아연피막 공정을 통하여 제거하기 위한 전처리공정과; 상기 전처리공정을 통하여 표면의 이물질이 제거되어진 도장대상물을 에어블로우를 통하여 1차 탈수시키는 공정과; 상기 1차탈수공정을 거친 도장대상물을 자동공급시켜 오븐드라이를 통하여 2차탈수 및 건조시키는 공정과; 상기의 공정을 통하여 탈수 및 건조되어진 도장대상물을 예열하고 원심력을 이용하여 분체도료를 표면에 입히고 용융. 전착방식으로 표면에 뭍은 도료를 용융시키는 방식으로 도막을 형성시키는 도장공정을 포함한다.As shown in the drawing, the present invention comprises: a pretreatment step for removing foreign matters accumulated on the surface of the coating object through a zinc phosphate coating process; Primary dewatering of the coating object from which the foreign matter on the surface is removed through the pretreatment process through an air blow; A step of automatically supplying a coating object having undergone the first dehydration step and dehydrating and drying it through an oven dry; Preheat the coating object dehydrated and dried through the above process, and apply powder coating to the surface using centrifugal force to melt. And a coating process for forming a coating film by melting a coating material applied to the surface by an electrodeposition method.

이하, 각 공정을 단계적으로 설명하기로 한다.Hereinafter, each process will be described step by step.

전처리공정Pretreatment process

도장대상물은 도장효율을 높히기 위해 그 표면에 뭍은 이물질을 인산아연피막 공정을 통하여 제거하기 위한 전처리공정을 거치게 된다.The coating object undergoes a pretreatment process to remove foreign matters accumulated on the surface of the coating object through a zinc phosphate coating process in order to increase the coating efficiency.

상기 전처리방식은 8조로 구성된 탕조내에 단계적으로 투입시켜 탈지 및 수세과정을 반복적으로 실시하여 표면에 뭍은 이물질을 제거하게 되는데, 상기 탕조의 구성은 저면에는 1쌍의 와류발생용 팬(Fan)이 구성되고 그 둘레면으로는 탕조내로 압축공기를 부여하기 위한 에어노즐이 설치되어 탕조내에 투입된 도금대상물에 뭍은 각종 이물질을 상기 의류발생용 팬에 의해 조성된 와류 및 에어노즐로 부터 공급되는 압축공기로 신속하면서도 효과적으로 제거시키게 된다.In the pretreatment method, the degreasing and washing process are repeatedly performed by stepping into a bath consisting of eight tanks to remove foreign substances stuck on the surface. The tank consists of a pair of vortex generating fans at the bottom. It is composed of air nozzles for imparting compressed air into the tank, and the compressed air supplied from the vortex and the air nozzle formed by the fan for generating clothes for the various foreign substances accumulated on the plating object put into the tank. This can be removed quickly and effectively.

1차 탈수공정Primary dewatering process

상기 전처리공정을 통하여 표면의 이물질이 완전히 제거되면 탕조의 상부에 배치된 에어블로우를 작동시켜 그 작동에 의해 발생된 바람으로 도금대상물의 표면에 뭍은 수분을 신속하게 탈수시킨다.When the foreign matter on the surface is completely removed through the pretreatment process, the air blower disposed on the upper portion of the water tank is operated to quickly dehydrate the water accumulated on the surface of the plating object by the wind generated by the operation.

2차탈수 및 건조공정Secondary Dewatering and Drying Process

상기 1차탈수공정을 거친 도장대상물을 오븐드라이내에 투입시켜 2차탈수 및 건조시키게 된다.The coating object subjected to the first dehydration process is introduced into an oven dry to perform secondary dehydration and drying.

상기 오븐드라이의 구조는, 그 형태가 내부에 와류순환팬이 장착된 닥트형태로 구성되면서 그 상부에는 히팅장치를 통하여 더운바람이 유입되는 통로가 마련되고 그 하부는 오븐드라이에 수용된 도장대상물로 부터 배출되는 습증기를 외부로 배출시키는 배출통로가 마련되어 상기 배출통로를 통하여 배출되는 습증기가 습기제거필터를 통과하면서 제거되고 더운 바람은 다시 상기 히팅장치를 순환하도록 하여 오븐드라이내의 데워진 공기를 외부로 유출시키지 않아 열효율을 극대화 한 것이다.The structure of the oven dry, while the shape is composed of a duct form equipped with a vortex circulation fan therein, the upper portion is provided with a passage through which a hot wind flows through the heating device and the lower portion from the coating object accommodated in the oven dry A discharge passage for discharging the wet steam to the outside is provided, and the wet steam discharged through the discharge passage is removed while passing through the dehumidification filter, and the hot wind causes the heating device to circulate again so that the warmed air in the oven driver is not discharged to the outside. It does not maximize thermal efficiency.

도장공정Painting process

상기의 공정을 통하여 탈수 및 건조되어진 도장대상물을 첨부되면 도 2 에 도시된 바와같이 분체용융 전착도장기내에 투입시켜 우선 도장대상물을 약 120도 내외의 온도에서 소정의 온도로 예열시킨다.When the coating object dehydrated and dried through the above process is attached, it is introduced into the powder melt electrodeposition coating machine as shown in FIG. 2 and first, the coating object is preheated to a predetermined temperature at a temperature of about 120 degrees.

상기와 같이 예열되어진 도장대상물은 컨베이어를 타고 분체도장회전조내에 투입되는데 상기 분체도장회전조는 그 형태가 세탁기통과 유사하게 구성되어 그 내부에 투입되어진 도장대상물을 고속으로 회전시켜 그 회전에 의해 발생되어진 원심력으로 도장페인트(분말도료)가 도장대상물에 일정한 두께로 도포되어지게 된다.The coating object preheated as described above is introduced into the powder coating rotating tank by a conveyor. The powder coating rotating tank has a shape similar to that of a washing machine, and rotates the coating object injected therein at a high speed to be generated by the rotation. By centrifugal force, the paint (powder coating) is applied to the coating object with a certain thickness.

상기의 과정을 통하여 도장대상물에 도료가 도포되어지면, 상기 도장대상물은 C 형의 순환구조를 갖는 투입벨트의 히팅존으로 유입되어 진다.When the coating material is applied to the coating object through the above process, the coating object is introduced into the heating zone of the input belt having a C-type circulation structure.

이렇게 상기 투입벨트의 히팅존에 유입되어진 도장대상물은 그 상부에 배치된 히팅수단에 의해 표면에 뭍은 분체도료가 서서히 용해되면서 일정한 두께의 도막을 형성하여 도장이 균일하게 연속적으로 진행되어지게 된다.In this way, the coating object introduced into the heating zone of the feeding belt is gradually dissolved in a powder coating thinned on the surface by the heating means disposed on the upper surface thereof to form a coating film having a constant thickness so that the coating proceeds uniformly and continuously.

또한 상기 과정을 통하여 도장되어진 도장대상물은 벨트를 타고 하방으로 이송되어 쿨링존을 통과하게 되면서 최종적으로 배출구를 통하여 완제품이 배출되어지게 된다.In addition, the object to be painted through the above process is transported downward through the belt to pass through the cooling zone and finally the finished product is discharged through the outlet.

본 발명은 도장대상물의 표면에 뭍은 이물질을 인산아연피막 공정을 통하여 전처리하게 됨으로서 도장후 치밀한 피막형성이 가능하고, 일련의 공정중 분체도장기법이 적용되어 다양한 색상연출이 가능하면서 유지관리비가 적게들고, 용융방식에 의해 대량의 도장대상물을 동시에 투입 분리함으로서 도장공정의 단축 및 생산성이 향상되는 효과가 있다.The present invention is capable of forming a dense film after coating by pre-treating the foreign matter splattered on the surface of the coating object through a zinc phosphate coating process, and applying a powder coating technique during a series of processes to produce a variety of colors, while maintaining a low maintenance cost. By holding and melting a large amount of coating objects at the same time by the melting method, there is an effect of shortening the coating process and improving productivity.

아울러 전착도장기법에 의해 미세한 틈새로도 도장이 가능하여 제품의 신뢰도를 향상시킬 수 있게 된다.In addition, it is possible to paint even a small gap by the electrodeposition coating technique to improve the reliability of the product.

Claims (1)

도장대상물의 표면에 뭍은 이물질을 인산아연피막 공정을 통하여 제거하기 위한 전처리공정과; 상기 전처리공정을 통하여 표면의 이물질이 제거되어진 도장대상물을 에어블로우를 통하여 1차 탈수시키는 공정과; 상기 1차탈수공정을 거친 도장대상물을 자동공급시켜 오븐드라이를 통하여 2차탈수 및 건조시키는 공정과; 상기의 공정을 통하여 탈수 및 건조되어진 도장대상물을 예열하고 원심력을 이용하여분체도료를 표면에 입히고 용융.전착방식으로 표면에 뭍은 도료를 용융시키는 방식으로 도막을 형성시키는 도장공정을 포함하는 것을 특징으로 하는 분체용융방식을 이용한 전착도장방법.A pretreatment step for removing the foreign matter accumulated on the surface of the coating object through a zinc phosphate coating process; Primary dewatering of the coating object from which the foreign matter on the surface is removed through the pretreatment process through an air blow; A step of automatically supplying a coating object having undergone the first dehydration step and dehydrating and drying it through an oven dry; And a coating process of preheating the dehydrated and dried coating object through the above process, coating the powder coating on the surface using centrifugal force, and forming a coating film by melting the paint spreading on the surface by melting and electrodeposition. Electrodeposition coating method using powder melting method.
KR1020000011255A 2000-03-07 2000-03-07 An electropainting method using a powder melting type KR20000030559A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100842308B1 (en) * 2006-11-14 2008-07-01 (주)동남알앤텍 Nano titanium polymer pigments and anti-corrosion and non-scale coating method using the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140400A (en) * 1983-01-31 1984-08-11 Nippon Paint Co Ltd Reverse coating method by electrodeposition
JPH1068099A (en) * 1996-08-28 1998-03-10 Honda Motor Co Ltd Reverse coating method
KR0154131B1 (en) * 1990-02-14 1998-11-16 로버트 에이치.존슨 Process for coating a metal strip with plastic powder
KR20010054409A (en) * 1999-12-06 2001-07-02 홍영철 Coating method of superior anti-corrosion layer on the surface of galvanized steel wire and strand

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140400A (en) * 1983-01-31 1984-08-11 Nippon Paint Co Ltd Reverse coating method by electrodeposition
KR0154131B1 (en) * 1990-02-14 1998-11-16 로버트 에이치.존슨 Process for coating a metal strip with plastic powder
JPH1068099A (en) * 1996-08-28 1998-03-10 Honda Motor Co Ltd Reverse coating method
KR20010054409A (en) * 1999-12-06 2001-07-02 홍영철 Coating method of superior anti-corrosion layer on the surface of galvanized steel wire and strand

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100842308B1 (en) * 2006-11-14 2008-07-01 (주)동남알앤텍 Nano titanium polymer pigments and anti-corrosion and non-scale coating method using the same

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