KR910003127B1 - Coating method for pipe - Google Patents

Coating method for pipe Download PDF

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Publication number
KR910003127B1
KR910003127B1 KR1019870014485A KR870014485A KR910003127B1 KR 910003127 B1 KR910003127 B1 KR 910003127B1 KR 1019870014485 A KR1019870014485 A KR 1019870014485A KR 870014485 A KR870014485 A KR 870014485A KR 910003127 B1 KR910003127 B1 KR 910003127B1
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KR
South Korea
Prior art keywords
pipe
workpiece
guide tube
coating
stopper
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KR1019870014485A
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Korean (ko)
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KR890009474A (en
Inventor
권영준
차이희
임경수
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만도기계 주식회사
정인영
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Priority to KR1019870014485A priority Critical patent/KR910003127B1/en
Publication of KR890009474A publication Critical patent/KR890009474A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C1/00Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05DPROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00Processes for applying liquids or other fluent materials

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  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

In the precoating methed, a quide pipe is used for preventing paint from intruding itself into the inside of the pipe-shaped object which is not wanted to be precoated. The quide pipe can check the paint intrusion height within itself by incresing the inner volume sum. The precoating method comprises a process of closing the open end of the pipe-shaped object (1) with a stopper (2) nd a process of inserting the quide pipe into the stepped portion of the hole (2A) provided in the center of the stopper (2). The advantage of this method is raduction of painting inferiority.

Description

한쪽면이 밀폐된 파이프형 부품의 외부전착도장 방법External electrodeposition coating method of one side sealed pipe type parts

제1a도는 본 발명의 일실시 단면예시도.Figure 1a is a cross-sectional view of an embodiment of the present invention.

제1b도는 본 발명의 다른 실시단면 예시도.Figure 1b is another exemplary cross-sectional view of the present invention.

제2도는 본 발명의 변형된 다른 실시 단면도.2 is another modified cross-sectional view of the present invention.

제3도는 종래 사용상태의 단면도.3 is a cross-sectional view of a conventional use state.

제4a도, 제4b도는 제1도의 작용상태도.4A and 4B are functional states of FIG.

제5도는 제2도의 작용상태도.5 is a working state of FIG.

제6도는 제3도의 작용상태도.6 is a working state of FIG.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 파이프형 피도물 1a : 개구부측1: pipe-like object 1a: opening side

2 : 마개 2A : 구멍2: stopper 2A: hole

3 : 가이드판 a : 내부공간3: guide plate a: inner space

본 발명은 한쪽면이 밀폐된 파이프형 부품의 외부전착도장 방법에 관한 것으로, 한쪽면이 밀폐되고 일측만 개구된 파이프형 기재부품의 외면에 전착에 의한 도장을 할 때 도장이 되어서는 내부에 도료가 묻지 못하도록 일측 개구부를 막아주는 마개에 구멍을 형성하고 이에 일정한 내부 체적을 갖는 가이드관을 삽입시켜 피도물(파이프형 가재부품)의 내부 체적의 합을 크게하여 도료액의 침투 높이를 가이드관이 조절하고 피도물의 마개내부로 침투되어진 도료액도 즉시 추출되어지게하여 피도물 내부로 침투되는 전처리액과 피도물 외부의 도료가 엉킴현상이 발생하여 도장불량이 발생하게 되는 것을 방지할 수 있게 한 것이다.The present invention relates to a method for external electrodeposition coating of a pipe-type part in which one side is sealed, and when painting by electrodeposition on the outer surface of a pipe-type base part in which one side is sealed and only one side is opened, the paint is coated inside. A hole is formed in the stopper to prevent the opening of one side, and a guide tube having a constant internal volume is inserted therein to increase the sum of the internal volumes of the workpiece (pipe type lobster parts), thereby controlling the penetration height of the paint liquid. In addition, the coating liquid penetrated into the stopper of the coating material is immediately extracted so that the pretreatment liquid penetrating into the coating material and the coating material outside the coating can be entangled, thereby preventing paint defects from occurring.

그리고, 변형된 실시방법으로 피도물의 일측 개구부를 막아주는 마개에 일정크기의 구멍을 형성시켜 놓아 전착도장시 일부의 전처리액이 피도물 내부에도 도착되어지나 도장 후 패도물 내부의 전처리액이 즉시 마개의 구멍을 통하여 추출되어지게 하여 피도물 외부의 도료와 엉킴현상이 발생하는 도장불량을 방지할 수 있게 한 것이다.In the modified method, a hole having a certain size is formed in the stopper to block one side opening of the workpiece, so that a part of the pretreatment liquid arrives inside the workpiece during electrodeposition coating. It is to be extracted through the hole to prevent paint defects caused by entanglement with the paint outside the workpiece.

이와같은 본 발명을 첨부 도면에 의하여 설명하면 다음과 같다.The present invention will be described with reference to the accompanying drawings.

한쪽면이 밀폐되고 일측면은 개구되어 있는 파이프형 부품인 피도물(1)의 개구부측(1A)을 막아주는 마개(2)의 중앙에 단턱(2A-1)이 형성되거나 직선으로 된 구멍(2A)을 형성하여 피도물의 내부공간(a)의 체적의 비례하는 내부체적을 갖는 가이드관(3)을 삽입 설치시켜 피도물의 내부 체적합을 가이드관으로 크게 조절할 수 있게하여서된 것이다.2A in which a step 2A-1 is formed or a straight hole 2A is formed at the center of the plug 2 which blocks one side and the one side opens the opening side 1A of the workpiece 1, which is a pipe-shaped part. By forming a guide tube (3) having an internal volume proportional to the volume of the interior space (a) of the workpiece to be able to largely control the internal volume of the workpiece with the guide tube.

이와같은 상태로 사용할 수 있게 된 본 발명의 기술내용을 실시예에 따라 구체적으로 설명하면 다음과 같다. 제1a도는 본 발명 일실시예의 단면도로서 일정체적의 내부공간(a)을 갖으며 한쪽면은 밀폐되고 일측면은 개구되어 있는 개구부측(1A)을 구비한 파이프형의 피도물(1)의 개구부측(1A)에 중앙구멍(2A)에 단턱(2A-1)이 형성되어 일정길이를 갖으며 내부 체적을 공간으로 형성한 가이드관(3)이 단턱(2A-1)에 의하여 삽입 고정되어진 마개(2)를 구비시켜 놓아 제4a도와 같이 전처리액에 침지하였을 때 가이드관(3)에 의하여 형성되어진 내부공간(a)의 넓이에 의하여 내부압과 체적합과 액상승수위가 균등하게 작용하여 도료 전처리액이 피도물(1)의 내부공간(a)으로 침투내지는 유입되지 않아 소망스러운 도장상태를 얻을 수 있게한 것으로, 전처리액에 피도물을 침지하여주게 되면 액수위가 작용하여 가이드관(3)을 통하여 일정한 량의 도장액이 가이드관내로 유입되어져 피도물과 가이드관의 내부 체적을 포함한 내부공간(a)의 내부체적과 액상승수위가 동일하여질때 유입되어 내부체적과 액수위가 평행을 유지하게되면 더 이상의 유입이 억제되어진 상태에서 전착도장이 이루어지게 한 것이다.When describing the technical content of the present invention that can be used in such a state according to the embodiment in detail. FIG. 1A is a cross-sectional view of an embodiment of the present invention, which has a constant volume of internal space a, one side of which is closed, and one side of which is an opening side of a pipe-like workpiece 1 having an opening side 1A. A stopper 2A-1 is formed in the center hole 2A in the center hole 2A and has a predetermined length, and a guide tube 3 having an internal volume formed into a space is inserted and fixed by the step 2A-1. 2) the internal pressure, volume matching, and liquid multiplier level are equally acted on by the width of the inner space (a) formed by the guide tube (3) when it is immersed in the pretreatment liquid as shown in FIG. 4a. The liquid does not penetrate into the interior space (a) of the object (1), so that the desired coating state can be obtained. When the object is immersed in the pretreatment liquid, the liquid level acts through the guide tube (3). A certain amount of coating liquid flows into the guide tube When the internal volume of the interior space (a), including the interior volume of the workpiece and the guide tube and the liquid multiplier level are the same, when the internal volume and the liquid level are kept parallel, electrodeposition coating is made while further inflow is suppressed. It is lost.

본 발명에서 전착도장을 하기전에 먼저 선행조건으로서는 피도물(1)의 외면에 접착성을 좋게하기 위하여 피도물의 외면에 묻은 이물질을 제거하고 예비탈지-본탈지-1차수세-2차수세-표면조정-화성피막-수세-순수세 등의 전처리 과정을 거쳐 전착도장이 매끄럽게 이루어질 수 있게 한 것이다.Prior to the electrodeposition coating in the present invention, first of all, as a prerequisite, in order to improve adhesion to the outer surface of the coating object 1, foreign matters attached to the outer surface of the coating object are removed and preliminary degreasing-degreasing-first washing-second washing-surface adjustment It is to make electrodeposition coating smooth through pretreatment process such as-chemical film, water washing, and pure water washing.

제1b도는 본 발명의 다른 실시단면도로써 일정체적의 내부공간(a)을 갖도록 한쪽면이 밀폐되고 일측면이 개구된 피도물(1)의 개구부측(1A)에 삽입되는 마개(2)의 중앙에 구멍(2A)을 천공하고 이에 가이드관(3)을 일정깊이까지 내부공간(a)으로 들어가지도록 삽입 설치하여 사용하게 한 것으로 개구부측(1A)에 삽입되는 마개(2)에 의하여 고정되는 가이드관(3)이 피도물(1)의 내부공간(a)까지 내설되어지게 한 것은 피도물(1)의 내부체적과 가이드관의 내부체적을 감안한 것으로 피도물의 내부체적이 적을 경우에도 가이드관의 내부체적의 일부가 줄어들어도 내부체적의 합과 액의 상승수위가 균등하여지면 사용에 별불편이 생기지 않는 것이며, 또한, 다른경우의 사용방법으로는 피도물을 도료탱크에 깊숙히 담그지 않을 경우 액의 상승수위가 약하게 작용하게 되므로 사용이 가능한 것입니다.Figure 1b is another embodiment of the present invention is a cross-sectional view of the plug (2) is inserted into the opening side (1A) of the workpiece (1), one side is sealed and one side is opened to have a certain volume of internal space (a) The guide tube fixed by the plug 2 inserted into the opening side 1A by boring the hole 2A and inserting the guide tube 3 into the inner space a to a predetermined depth. (3) The internal space (a) of the workpiece (1) is built up in consideration of the internal volume of the workpiece (1) and the internal volume of the guide tube, even when the internal volume of the workpiece is small. Even if some part is reduced, if the sum of the internal volume and the level of liquid level rise equally, there is no inconvenience in use.In addition, if the material is not immersed in the paint tank, the level of liquid level becomes weak. To function This is because it is available.

이와같은 방법에 의하여 전착도장을 하게되면 전착도장의 도료액 일부가 가이드관내로 유입되어지나 한쪽면이 밀폐된 피도물의 내부공간(a)에 일정한 내부압이 형성되어 가이드관을 통하여 내부공간으로 유입되어지려는 도료액의 상승수위에 균일하게 작용하여 전착도장 도료는 피도물 내부공간으로 침투되지 못하고 가이드관의 내면 일부에만 유입되어져 있다가 흘러내려갈 수 있게 한 것이다. 현째까지의 전착도장 방법은 제3도에서와 같이 피도물(1)의 개구부측(11A)에 마개(12)를 이용하여 밀폐시켜 사용되어지고 있으나 이와 같은 종래의 방법에서는 마개(12)로 밀폐되어진 부분이 전처리 공정중 피도물(11) 내부공간(b)의 온도나 압력과 외부온도나 압력이 서로 상이하여 일부의 전처리액이 피도물의 개구부측과 마개 사이에 미세하게 형성된 틈새를 통하여 피도물의 내부공간으로 침투되어져 전처리공정 후 전착도장을 실시할 때 피도물 내부에 침투되어져 있던 전처리액이 흘러나오며 피도물 외부의 도장 도료와 엉킴 현상이 발생하여 도장 불량을 야기시키게 되는 등의 문제점이 있었다.When electrodeposition coating is carried out in this way, a portion of the coating liquid of electrodeposition coating is introduced into the guide tube, but a constant internal pressure is formed in the inner space (a) of the coated object with one side closed and flows into the inner space through the guide tube. By uniformly acting on the rising water level of the paint liquid to be applied, the electrodeposition coating paint is not allowed to penetrate into the interior space of the coating material, but only flows into a portion of the inner surface of the guide pipe and flows down. The electrodeposition coating method up to now is used by sealing the plug 12 at the opening side 11A of the workpiece 1 as shown in FIG. 3, but in the conventional method, the closure 12 is sealed. Part of the interior space of the workpiece through a gap formed between the opening side and the stopper of the target part is different because the temperature or pressure and the external temperature or pressure of the interior space (b) of the workpiece 11 is different from each other during the pretreatment process. When the electrodeposition coating was carried out after the pretreatment process, the pretreatment liquid penetrated into the coating material flowed out and entangled with the coating paint on the outside of the coating material, resulting in poor coating.

본 발명은 피도물의 내부공간의 밀폐에 의하여 생기는 외부온도와 압력차를 없앴으며, 피도물 내부공간에 가이드관의 내부체적을 더하여 공유면적을 넓혀주었으며 일부의 침투되어질 수 있는 전처리액을 가이드관이 즉시 외부로 추출하여 주어 전처리액의 내부 침투로 인하여 야기되었던 도장불량 현상을 예방할 수 있게 한 것이다. 그리고, 본 발명의 변형된 실시방법으로는 가이드관을 사용하지 않고 마개(2)의 중앙에 구멍(2A)만을 형성시켜 놓아 전처리 공정시에 침투되었던 전처리액이나 전착도장시에 유입되어지는 도장 도료가 작업 후 즉시 추출되어질 수 있게하여 피도물의 내부공간 일부에 전처리 공정과 전착 도장이 이루어지게하여 사용할 수도 있게 한 것이다.The present invention eliminates the difference between the external temperature and the pressure caused by the sealing of the interior space of the workpiece, and added the internal volume of the guide tube to the interior space of the workpiece to enlarge the shared area, and the guide tube immediately pre-treatment liquid that can be partially penetrated. Extraction to the outside prevents coating defects caused by the internal penetration of the pretreatment solution. In the modified embodiment of the present invention, only the hole 2A is formed in the center of the stopper 2 without using the guide tube, and the coating material introduced during the pretreatment or electrodeposition coating is formed. It can be extracted immediately after the work so that the pre-treatment process and electrodeposition coating can be used in a part of the interior space of the workpiece.

이와같이 사용할 수 있게된 본 발명은 한쪽이 밀폐된 파이프형 부품의 내부 체적을 감안하고 전처리시 피도물의 내부공간과 전처리액의 수위에 따른 압력차와 온도차를 감안하여 전처리액이 피도물의 내부공간으로 상승하는 것을 억제하는 범위내에서 가이드관을 개구부측에 삽입되는 마개에 설치시켜 1차적으로는 전처리액의 피도물 내부공간으로의 침투를 방지하였으며, 전착도장을 할 때에도 피도물의 내부공간에 있는 공기의 체적합이 전착도장 도료의 액상승 수위가 동일 압력이 될수 있는 상태까지만 도료가 가이드관으로 밀려들어와 동일상태를 유지하여 더이상 침투되어 지지 않게하므로서 피도물의 내부공간에는 전혀 도료가 전착되어지지 않게한 것이다.According to the present invention, the pretreatment liquid rises to the interior space of the workpiece in consideration of the internal volume of the pipe-type part sealed on one side and the pressure difference and temperature difference according to the inner space of the workpiece and the level of the pretreatment liquid during pretreatment. The guide tube was installed in the stopper inserted into the opening side within the range of suppressing the preservation, and primarily prevented the penetration of the pretreatment liquid into the interior space of the workpiece. Only when the liquid level rise of the electrodeposition paint can be the same pressure, the paint is pushed into the guide tube and kept in the same state so that it does not penetrate any more, so that the paint is not electrodeposited at all in the interior space of the coating.

Claims (1)

한쪽면이 밀폐되고 일측이 개구된 파이프형 피도물의 개구부를 마개로 밀폐하여 전처리 및 전착도장하는 방법에 있어서, 피도물의 개구부측을 막는 마개의 중앙구멍에 일정길이의 가이드관을 삽입외향 돌출시켜 내부공간 체적의 합을 크게하여 도료액이 피도물의 내부공간까지 상승하지 못하고 가이드관에서 동일수위가 유지되어지도록 하여서된 한쪽면이 밀폐된 파이프형 부품의 외부전착도장방법.In the method of pre-treatment and electrodeposition coating by sealing the opening of the pipe-like object with one side closed and one side open with a stopper, a guide tube having a predetermined length is inserted into the central hole of the plug which blocks the opening side of the object to be projected outward. A method of external electrodeposition coating of a pipe-type component in which one side is sealed so that the sum of the volume of the space does not allow the paint liquid to rise to the interior space of the workpiece and maintains the same level in the guide tube.
KR1019870014485A 1987-12-18 1987-12-18 Coating method for pipe KR910003127B1 (en)

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KR1019870014485A KR910003127B1 (en) 1987-12-18 1987-12-18 Coating method for pipe

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KR890009474A KR890009474A (en) 1989-08-02
KR910003127B1 true KR910003127B1 (en) 1991-05-20

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