JPH0626697B2 - Cleaning method for paint transfer pipe - Google Patents
Cleaning method for paint transfer pipeInfo
- Publication number
- JPH0626697B2 JPH0626697B2 JP62089076A JP8907687A JPH0626697B2 JP H0626697 B2 JPH0626697 B2 JP H0626697B2 JP 62089076 A JP62089076 A JP 62089076A JP 8907687 A JP8907687 A JP 8907687A JP H0626697 B2 JPH0626697 B2 JP H0626697B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- acid
- pipe
- transfer pipe
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
- B08B9/0323—Arrangements specially designed for simultaneous and parallel cleaning of a plurality of conduits
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は車両、電気製品、各種機器類等の塗装ラインに
おいて使用される塗料移送配管内に残留固着する塗料、
顔料、錆および塵埃等の夾雑物を効果的に除去すること
によって該配管内を清浄化する方法に関する。Description: TECHNICAL FIELD The present invention relates to a coating material that remains adhered in a coating material transfer pipe used in a coating line for vehicles, electric appliances, various devices, and the like.
The present invention relates to a method for cleaning the inside of the pipe by effectively removing contaminants such as pigments, rust and dust.
従来の技術 車両、電気製品、各種機器類等の塗装ラインにおいて
は、塗料は塗料調合室（ミキシングルーム）から塗料移
送配管内（サーキュレーションパイプ）を経て塗装ブー
ス内の枝管へ送給され、該枝管へ接続された自動塗装機
または塗装ガンを介して車体等の被塗物に塗装され、余
剰の塗料は塗料調合室へ返送される。2. Description of the Related Art In a coating line for vehicles, electric appliances, various devices, etc., paint is delivered from a paint mixing room (mixing room) to a branch pipe in a paint booth through a paint transfer pipe (circulation pipe). It is applied to an object to be coated such as a vehicle body through an automatic painting machine or a painting gun connected to the branch pipe, and excess paint is returned to the paint preparation room.
この場合、該塗料移送配管内においては経時的に発錆が
おこるだけでなく、塗料や顔料および繊維屑や塵埃高の
夾雑物が固着残留する。このような塗料固化物、顔料、
錆および夾雑物は配管内を流通する塗料に連行されて被
塗物の表面上に沈着して塗装不良をもたらすので、該配
管内の定期的なおよび／または新規調合塗料送給前の洗
浄工程は省略できない工程となっている。In this case, not only rusting occurs with time in the paint transfer pipe, but also paints, pigments, fiber scraps, and dust-rich contaminants adhere and remain. Such paint solids, pigments,
Rust and contaminants are entrained by the paint flowing in the pipe and are deposited on the surface of the object to be coated, resulting in a coating failure. Therefore, a regular cleaning process in the pipe and / or a cleaning process before feeding a newly prepared paint. Is a process that cannot be omitted.
従来の主流をなす洗浄方式は、塗料移送配管内に洗浄用
シンナーを通常約０．５カ月〜１カ月間にわたって循環
させる循環共洗方式であるが、配管内壁に固着した塗
料、顔料および錆等はほとんど除去できない。A conventional mainstream cleaning method is a circulation co-cleaning method in which a cleaning thinner is normally circulated in a paint transfer pipe for about 0.5 months to 1 month, but paints, pigments, rust, etc. adhered to the inner wall of the pipe. Can hardly be removed.
また高圧水洗洗浄方式やピグ洗浄方式も一部においては
採用されているが、塗料移送配管は径が小さくて（１／
８〜２インチ）、長く（５０〜１０００ｍ）、曲折部を
多く有し、その耐圧性も低いので、このような洗浄方式
の適用範囲は狭く、満足な洗浄効果も得られない。In addition, the high-pressure water washing method and the pig washing method are also used in some parts, but the paint transfer pipe has a small diameter (1 /
8 to 2 inches), long (50 to 1000 m), has many bent portions, and has low pressure resistance, so that the range of application of such a cleaning method is narrow and a satisfactory cleaning effect cannot be obtained.
さらに溶剤型塗料除去剤または無機酸を用いる洗浄方法
も提案されているが、塗料、顔料、錆およびその他の夾
雑物から成る複合汚染固着残留物の十分な除去は期待で
きない。Further, a cleaning method using a solvent type paint remover or an inorganic acid has been proposed, but it is not expected to sufficiently remove the complex stain-adhering residue consisting of paint, pigment, rust and other impurities.
以上のように、従来の洗浄方式によっては塗料移送配管
内に固着残留する塗料、顔料、錆およびその他の夾雑物
を十分に除去することはできない。このため従来はこの
ような複合汚染固着残留物に起因する塗装不良を修復す
るために塗装物をサンドペーパーがけと再塗装処理に付
しているが、このような修復処理には多大な余分のコス
トを必要とする。As described above, the conventional cleaning method cannot sufficiently remove the paint, pigment, rust, and other contaminants that stick and remain in the paint transfer pipe. For this reason, in the past, in order to repair coating defects due to such complex contamination adhesion residue, the coated object is subjected to sandpaper scrubbing and repainting treatment, but such repair treatment requires a large amount of extra work. Need a cost.
発明が解決しようとする問題点 本発明は、修復処理を必要とする塗装不良の原因となる
上記の複合汚染固着残留物を塗料移送配管内から効果的
に除去する方法を提供するためになされたものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention has been made to provide a method for effectively removing from the paint transfer pipe the above-mentioned complex stain-adhering residue that causes a paint failure requiring a repair treatment. It is a thing.
問題点を解決するための手段 即ち本発明は、塗料移送配管内を洗浄するにあたり、該
配管内をまず塗料除去剤を用いて処理し、次いで酸を用
いて処理した後、フラッシング処理をおこない、さらに
水置換処理をおこなうことを特徴とする塗料移送配管内
の洗浄方法に関する。Means for Solving the Problems That is, in the present invention, in cleaning the inside of the paint transfer pipe, the inside of the pipe is first treated with a paint remover, and then treated with an acid, and then a flushing treatment is performed. Further, the present invention relates to a method for cleaning the inside of a paint transfer pipe, which is characterized by performing a water replacement process.
本発明において用いる塗料除去剤としては従来から公知
の溶剤型のもの、例えば塩素系溶剤（例えば塩化メチレ
ン、トリクレン、1,1,1−トリクロルエタン、テトラク
ロルエチレン等）にモノエタノールアミン、ジエタノー
ルアミン、トリエタノールアミン、フェノール、ギ酸、
シュウ酸、酢酸、硫酸、硝酸、フッ酸、パラフィンワッ
クス、界面活性剤、増粘剤等を配合した塗料除去剤等を
使用してもよいが、配管壁に固着した塗料に対する剥離
性が悪いか、あるいは固着塗料を膨潤剥離させるために
その後の濾過処理を困難にし、さらに塩素系溶剤蒸気に
よって塗装工場内の塗装物の塗膜が縮むという問題をも
たらすのであまり実用的ではない。As the paint remover used in the present invention, a conventionally known solvent type, for example, a chlorine-based solvent (e.g., methylene chloride, trichlene, 1,1,1-trichloroethane, tetrachloroethylene, etc.) in monoethanolamine, diethanolamine, Triethanolamine, phenol, formic acid,
A paint remover containing oxalic acid, acetic acid, sulfuric acid, nitric acid, hydrofluoric acid, paraffin wax, a surfactant, a thickener, etc. may be used, but is it difficult to remove the paint adhered to the pipe wall? Alternatively, since the adhered coating material is swollen and peeled off, the subsequent filtration treatment becomes difficult, and the coating film of the coating material in the coating factory shrinks due to the chlorine-based solvent vapor, which is not very practical.
本発明に使用する塗料除去剤として最も好適なものはこ
れらの問題点をもたらさないアルカリの水溶性溶剤溶
液、即ち水酸化ナトリウムや水酸化カリウム等のアルカ
リを水溶性溶剤、例えばメタノール、エタノール、ジエ
チレングリコールモノメチルエーテルまたはエチレング
リコールモノメチルエーテル等に溶解させた溶液であ
る。The most preferable paint remover used in the present invention is an aqueous solution of an alkali that does not bring about these problems, that is, an alkali such as sodium hydroxide or potassium hydroxide is a water-soluble solvent, for example, methanol, ethanol or diethylene glycol. It is a solution dissolved in monomethyl ether or ethylene glycol monomethyl ether.
上記溶液はアルカリを適当量の水に溶解し、これを水溶
性溶剤に希釈して調製することができる。塗料除去剤中
のアルカリ濃度は５〜５０重量％、その中の水溶性溶剤
は１０〜４０重量％が好ましい。The above solution can be prepared by dissolving an alkali in an appropriate amount of water and diluting this with a water-soluble solvent. The alkali concentration in the paint remover is preferably 5 to 50% by weight, and the water-soluble solvent therein is preferably 10 to 40% by weight.
このようなアルカリの水溶性溶剤溶液の使用濃度は被処
理配管の汚染度や管壁に固着した塗料の種類等に左右さ
れ、特に限定的ではないが、塗料除去剤中のアルカリ濃
度が例えば２５重量％のとき、通常は塗料除去剤を約５
〜１００％、好ましくは約４０〜６０％となるように水
で希釈して用いる。The concentration of such a water-soluble alkali solution used depends on the degree of contamination of the pipe to be treated and the type of paint adhered to the pipe wall, and is not particularly limited, but the alkali concentration in the paint remover is, for example, 25 At 5% by weight, the paint remover is usually about 5
It is used by diluting with 100%, preferably about 40 to 60% with water.
アルカリの水溶性溶剤溶液には所望によりキレート化剤
（例えばＥＤＴＡ、ＮＴＡ、クエン酸ナトリウム等）、
剥離促進剤（例えばモノエタノールアミン、ジエタノー
ルアミン、トリエタノールアミン等）、防錆剤（例えば
亜硝酸ソーダ、リン酸ソーダ、ホウ酸ソーダ、有機酸塩
等）等の添加剤を適宜配合してもよい。If desired, a chelating agent (eg, EDTA, NTA, sodium citrate, etc.) may be added to the aqueous solution of alkali in a solvent.
Additives such as a peeling accelerator (for example, monoethanolamine, diethanolamine, triethanolamine, etc.), a rust preventive (for example, sodium nitrite, sodium phosphate, sodium borate, organic acid salt, etc.) may be appropriately blended. .
上記の塗料除去剤は循環装置を用いて塗料移送配管内を
循環させる。循環装置としては自体公知のいずれのもの
を使用してもよく、循環装置の容量および材質は塗料移
送配管の径や長さおよび塗料除去剤の種類等を考慮して
適宜選定する。また、循環装置の現場での組立て施工に
係わる時間的経済的損失の回避および洗浄作業の標準化
による一定の洗浄グレードと作業安全性の確保という見
地からは、タンク、ポンプおよび濾過装置等を一体的に
組み込んだユニット循環装置を使用するのが好ましい。The paint removing agent is circulated in the paint transfer pipe by using a circulation device. As the circulation device, any one known per se may be used, and the capacity and material of the circulation device are appropriately selected in consideration of the diameter and length of the paint transfer pipe and the type of paint remover. In addition, from the standpoint of avoiding the time and economic loss associated with the on-site assembly work of circulation equipment and ensuring a certain cleaning grade and work safety by standardizing cleaning work, tanks, pumps, filtration equipment, etc. are integrated. It is preferable to use a unit circulation device incorporated in the.
塗料除去剤の循環温度、循環時間および循環速度は塗料
除去剤の種類や濃度および被処理配管内の汚染度等に応
じて適宜選定すればよく特に限定的ではないが、通常は
それぞれ常温〜約９０℃、約０．５〜８時間および約
０．５〜３ｍ／秒である。The circulating temperature, circulating time, and circulating speed of the paint remover may be appropriately selected according to the type and concentration of the paint remover and the degree of contamination in the pipe to be treated, etc., but are not particularly limited, but usually from room temperature to about 90 ° C, about 0.5-8 hours and about 0.5-3 m / sec.
上記の塗料除去剤を用いる処理工程によって配管内壁上
の固着塗料はほとんど完全に溶解除去される。この処理
工程が終了した後は、溶解塗料を含有する該処理剤を系
外へ排出させ、配管内を水洗し、次の酸処理工程へ移
る。By the treatment process using the above paint remover, the adhered paint on the inner wall of the pipe is almost completely dissolved and removed. After this treatment step is completed, the treatment agent containing the dissolved coating material is discharged to the outside of the system, the inside of the pipe is washed with water, and the process proceeds to the next acid treatment step.
酸処理工程は主として上記の塗料除去剤によっては除去
されずに配管壁上に沈積残留する顔料や錆を除去するた
めにおこなうものである。The acid treatment step is mainly performed to remove the pigment and rust that are not removed by the above paint remover but remain on the pipe wall.
酸として最も好適なものは塩酸、硫酸、フッ酸、リン
酸、スルファミン酸等の無機酸であるが、配管壁上の顔
料や錆の沈積残留量が少ない場合にはクエン酸や酒石酸
等の有機酸を使用することもできる。The most suitable acid is an inorganic acid such as hydrochloric acid, sulfuric acid, hydrofluoric acid, phosphoric acid, sulfamic acid, etc., but when the amount of pigment or rust deposited on the pipe wall is small, organic acids such as citric acid or tartaric acid are used. Acids can also be used.
酸の使用濃度は酸の種類、顔料や錆等の沈積残留量等に
左右され、特に限定的ではないが、通常は約１〜５０
％、好ましくは約５〜２０％である。The concentration of the acid used depends on the type of the acid, the residual amount of pigment, rust, etc. deposited, and is not particularly limited.
%, Preferably about 5-20%.
酸処理剤には所望により腐食抑制剤、例えばチオ尿素、
ジエチルチオ尿素、メルカプタン、サルファイド、シュ
ウ酸、ヘキサメタリン酸ソーダ等を適宜配合してもよ
い。If desired, the acid treating agent may be a corrosion inhibitor such as thiourea,
Diethyl thiourea, mercaptan, sulfide, oxalic acid, sodium hexametaphosphate and the like may be appropriately mixed.
酸処理剤は上記の循環装置を用いて塗料移送配管内を循
環させる。酸処理剤の循環温度、循環時間および循環速
度は酸の種類や濃度および顔料や錆等の沈積残留量等に
応じて適宜選定すればよいが、通常はそれぞれ約３０〜
６０℃、約０．５〜４時間および約０．５〜３ｍ／秒で
ある。The acid treatment agent is circulated in the paint transfer pipe by using the above circulation device. The circulation temperature, circulation time and circulation speed of the acid treating agent may be appropriately selected depending on the type and concentration of the acid and the residual amount of deposit such as pigment and rust.
60 ° C., about 0.5-4 hours and about 0.5-3 m / sec.
上記の酸処理工程によって塗料移送配管内壁上に沈積残
留する顔料や錆はほとんど完全に除去される。この酸処
理工程が終了した後は、顔料や錆を含有する酸処理剤を
系外へ排出させ、配管内を水洗し、対のフラッシング処
理工程へ移る。前記の塗料除去剤を用いる処理工程およ
びその後の酸を用いる処理工程を経てもなお配管内壁上
に残留する塗料残滓、錆片、塵埃等のその他の夾雑物を
除去するためにフラッシング処理をおこなう。By the above acid treatment step, the pigment and rust remaining on the inner wall of the paint transfer pipe are almost completely removed. After this acid treatment step is completed, the acid treatment agent containing pigment and rust is discharged out of the system, the inside of the pipe is washed with water, and the pair of flushing treatment steps is performed. A flushing process is performed in order to remove other contaminants such as paint residues, rust pieces, and dust remaining on the inner wall of the pipe even after the treatment process using the paint removing agent and the subsequent treatment process using an acid.
フラッシング剤としては水のみを使用してもよいが、前
記の処理工程によって清浄化した配管内壁の発錆を防ぐ
ために防錆剤の水溶液（通常約０．５〜１０％）を用い
るのが好ましい。Although only water may be used as the flushing agent, it is preferable to use an aqueous solution of the rust preventive agent (usually about 0.5 to 10%) to prevent rusting of the inner wall of the pipe cleaned by the above-mentioned treatment step. .
防錆剤としては亜硝酸ナトリウム、リン酸ナトリウム、
モノエタノールアミン、ジエタノールアミン、トリエタ
ノールアミン、硼素化合物、有機酸のアミン塩等が例示
されるが、この後の水置換工程で使用する水置換剤に溶
解する有機酸のアミン塩が好適である。As rust preventive agents, sodium nitrite, sodium phosphate,
Examples include monoethanolamine, diethanolamine, triethanolamine, boron compounds, amine salts of organic acids, etc., and amine salts of organic acids that are soluble in the water displacing agent used in the subsequent water displacing step are preferable.
フラッシング剤も上記の循環装置を用いて塗料移送配管
内を循環させ、搬送される塗料残滓、錆片および塵埃等
のその他の夾雑物は濾過装置によって捕捉し、フィルタ
ーは適宜取り替える。The flushing agent is also circulated in the paint transfer pipe by using the above-mentioned circulation device, and other contaminants such as paint residues, rust pieces and dust that are conveyed are captured by the filtration device, and the filter is appropriately replaced.
フラッシング剤の循環温度、循環時間および循環速度も
特に限定的ではないが、通常はそれぞれ約０〜５０℃、
約５〜２４時間および約０．５ｍ／秒以上（好ましくは
約１．５〜７．０ｍ／秒）である。特に流速は０．５ｍ
／秒以下ではフラッシング効果が弱く、７ｍ／秒以上に
なると塗料移送配管の接合部への負荷や耐圧度および経
済性等の点で問題があって好ましくない。The circulation temperature, circulation time and circulation speed of the flushing agent are not particularly limited, but usually about 0 to 50 ° C.,
It is about 5 to 24 hours and about 0.5 m / sec or more (preferably about 1.5 to 7.0 m / sec). Especially the flow velocity is 0.5m
If the flow rate is less than 1 / sec, the flushing effect is weak, and if it is more than 7 m / sec, there are problems in terms of load on the joint portion of the paint transfer pipe, pressure resistance, and economical efficiency.
ただし、配管が耐え得るなら、移送圧を高くしてフラッ
シングを行うことも可能である。However, if the pipe can withstand, it is also possible to perform the flushing by increasing the transfer pressure.
上記のフラッシング処理工程によって塗料移送配管内に
残留する塗料残滓、錆片、塵埃等の夾雑物はほとんど完
全に除去される。この処理工程が終了した後は、フラッ
シング剤を系外へ排出させ、次の水置換工程へ移る。By the above-mentioned flushing process step, contaminants such as paint residue, rust pieces, and dust remaining in the paint transfer pipe are almost completely removed. After this treatment process is completed, the flushing agent is discharged to the outside of the system, and the process proceeds to the next water replacement process.
水置換は前記の処理工程終了後の塗料移送配管内に残留
する水分を除去するためにおこなうものである。塗料中
に混入する水分は塗膜不良をもたらす１つの原因であ
り、含水率が通常約０．５％以下になるように配管内の
水置換処理をおこなう。The water replacement is carried out in order to remove the water remaining in the paint transfer pipe after the above-mentioned treatment process. Moisture mixed in the paint is one of the causes of coating film failure, and the water replacement process in the pipe is performed so that the water content is usually about 0.5% or less.
水置換剤として好適なものは水溶性の低沸点有機溶剤、
例えばメタノール、エタノール、イソプロピルアルコー
ルおよびアセトン等である。Suitable as the water displacing agent is a water-soluble low-boiling organic solvent,
For example, methanol, ethanol, isopropyl alcohol, acetone and the like.
水置換はこのような水置換剤を上記の循環装置を用いて
塗料移送配管内を循環させることによっておこなう。水
置換剤の循環速度、循環時間および循環速度も特に限定
的ではないが、通常はそれぞれ約０〜４０℃、約０．５
〜２時間および約０．５〜３ｍ／秒である。Water replacement is carried out by circulating such a water displacing agent in the paint transfer pipe using the above-mentioned circulation device. The circulation rate, circulation time, and circulation rate of the water displacing agent are not particularly limited, but usually about 0 to 40 ° C. and about 0.5, respectively.
~ 2 hours and about 0.5-3 m / sec.
水置換工程の終了後、配管内の水置換剤を系外へ排出さ
せることによって本発明による塗料移送配管内の洗浄方
法は完了する。After the completion of the water replacement step, the water replacement agent in the pipe is discharged to the outside of the system to complete the method for cleaning the paint transfer pipe in the present invention.
以下、本発明を実施例によって説明する。Hereinafter, the present invention will be described with reference to examples.
実施例 実施例１ 自動車の塗装ラインの塗料移送配管（メラミン樹脂系塗
料の送給稼動日数：１年、材質：ＳＴＰＧ、管の内径：
１インチ、管の全長：４００ｍ）をタンク、ポンプおよ
び濾過装置等を一体的に組み込んだユニット循環装置を
用いてまず塗料除去剤を循環させ（塗料除去剤組成：水
酸化カリウム、ジエチレングリコールモノエチルエーテ
ル、モノエタノールアミン、有機酸塩、循環温度：５０
℃、循環時間：３時間、循環速度：１．７ｍ／秒）、該
除去剤を系外へ排出させた後、配管内を水洗し、次いで
酸処理剤を循環させ（酸処理剤組成：リン酸、チオ尿
素、ヘキサメタリン酸ソーダ）、循環温度：４５℃、循
環時間：１時間、循環速度：１．７ｍ／秒）、該酸処理
剤を系外へ排出さぜた後、配管内を水洗した。引き続き
フラッシング剤を循環させ（フラッシング剤組成：モノ
エタノールアミン、ｐ−ｔ．ブチル安息香酸、循環温
度：３５℃、循環時間：１６時間、循環速度：３．１ｍ
／秒）、該フラッシング剤を系外へ排出させた後、配管
内の水置換をおこなったところ（水置換剤：イソプロピ
ルアルコール、循環温度：２６℃、循環時間：０．５時
間、循環速度１．７ｍ／秒）、清浄な配管内壁面があら
われた。なお、最終洗浄液についてコンタミキット中の
ゴミ数を調べたところ、次の通りであった： ５０μ以上のゴミ・・・・０ ４０〜５０μのゴミ・・・０ ３０〜４０μのゴミ・・・２ １０〜２０μのゴミ・・・５ １０μ以下のゴミ・・・・２ 以上の洗浄処理に付した塗料移送配管を利用した自動車
の車体をメラミン樹脂系塗料で塗装したところ、塗料フ
ィルター（３００メッシュ）の目詰りは全くみられなか
った。また塗装面上の夾雑異物を肉眼で調べたところ、
わずかに数点観察されただけで、その他の塗装不良も全
く認められなかった。Example Example 1 Paint transfer pipe for automobile coating line (melamine resin-based paint feed operation days: 1 year, material: STPG, pipe inner diameter:
First, the paint remover is circulated using a unit circulation device that integrally incorporates a tank, a pump, a filtration device, etc. (1 inch, total length of pipe: 400 m) (paint remover composition: potassium hydroxide, diethylene glycol monoethyl ether). , Monoethanolamine, organic acid salt, circulation temperature: 50
C., circulation time: 3 hours, circulation speed: 1.7 m / sec), after the removal agent was discharged out of the system, the inside of the pipe was washed with water, and then the acid treatment agent was circulated (acid treatment agent composition: phosphorus Acid, thiourea, sodium hexametaphosphate), circulation temperature: 45 ° C., circulation time: 1 hour, circulation speed: 1.7 m / sec), after the acid treatment agent is discharged out of the system, the inside of the pipe is washed with water. did. Subsequently, the flushing agent was circulated (composition of flushing agent: monoethanolamine, pt-butyl benzoic acid, circulation temperature: 35 ° C., circulation time: 16 hours, circulation speed: 3.1 m
/ Sec), the flushing agent was discharged to the outside of the system, and then the water in the pipe was replaced (water displacement agent: isopropyl alcohol, circulation temperature: 26 ° C., circulation time: 0.5 hour, circulation speed 1 0.7 m / sec), and a clean inner wall surface of the pipe appeared. When the number of dust in the contamination kit was examined for the final washing solution, it was as follows: 50 μm or more dust ... 0 40-50 μ dust ... 0 30-40 μ dust ... 2 10 to 20μ of dust ... 5 10μ or less of dust ... 2 A car body that uses paint transfer piping that has been subjected to the above cleaning treatment was painted with melamine resin-based paint, and a paint filter (300 mesh) Was not clogged at all. Moreover, when the foreign substances on the painted surface were examined with the naked eye,
Only a few points were observed, and no other paint defects were observed.
比較例１ 実施例１と同様の塗料送給稼動日数を経た塗料移送配管
において実施例１と同様に洗浄用シンナーを常温で３０
日間循環させたが（循環速度：３．１ｍ／ 秒）、清浄
な配管内壁はあらわれなかった。Comparative Example 1 A paint thinner was used at room temperature in the same manner as in Example 1 in a paint transfer pipe that had passed the same paint feeding operation days as in Example 1.
It was circulated for a day (circulation speed: 3.1 m / sec), but no clean inner wall of the pipe appeared.
なお、最終洗浄液についてコンタミキット中のゴミ数を
調べたところ、次の通りであった。： ５０μ以上のゴミ・・・・１ ４０〜５０μのゴミ・・・４ ３０〜４０μのゴミ・・・２０ １０〜２０μのゴミ・・・３６ １０μ以下のゴミ・・・・無数 このシンナー洗浄処理に付した塗料移送配管を利用して
自動車の車体をメラミン樹脂系塗料で塗装したところ、
塗料フィルター（３００メッシュ）は目詰りのために１
日に一回取り替えなければならなかった。また塗装面上
の夾雑異物を肉眼で調べたところ、約４０〜６０点観察
された。The number of dust in the contamination kit of the final washing solution was examined and the results were as follows. : 50μ or more dust ... 1 40-50μ dust ... 4 30-40μ dust ... 20 10-20μ dust ... 36 10μ or less dust ... innumerable this thinner cleaning treatment When the car body was painted with melamine resin-based paint using the paint transfer pipe attached to
Paint filter (300 mesh) is 1 for clogging
I had to replace it once a day. Moreover, when foreign substances on the coated surface were examined with the naked eye, about 40 to 60 points were observed.
発明の効果 本発明による洗浄方法によれば、塗装不良の原因となる
塗料、顔料、錆および塵埃等の夾雑物を塗料移送配管か
ら効果的に除去することができるので、洗浄後の塗料移
送配管を再使用しても塗料フィルターが目詰りをおこす
ことなく、また塗装品の表面に夾雑異物が沈積すること
による塗装後の修復処理の必要もない。EFFECTS OF THE INVENTION According to the cleaning method of the present invention, it is possible to effectively remove contaminants such as paints, pigments, rust, and dust that cause coating defects from the paint transfer pipe. Even if it is reused, the paint filter does not become clogged, and there is no need for a repair process after painting due to the accumulation of foreign substances on the surface of the coated product.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 片山 丈太郎 東京都港区浜松町１−27−17 株式会社ネ オス内 (56)参考文献 特開 平１−109873（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Taketaro Katayama 1-27-17 Hamamatsucho, Minato-ku, Tokyo Within Neos Co., Ltd. (56) Reference JP-A-1-109873 (JP, A)
Claims (5)
管内をまず、塗料除去剤を用いて処理し、次いで酸を用
いて処理した後、フラッシング処理をおこない、さらに
水置換処理をおこなうことを特徴とする塗料移送配管内
の洗浄方法。1. When cleaning the inside of a paint transfer pipe, the inside of the pipe is first treated with a paint remover, then treated with an acid, and then flushed and then replaced with water. A method for cleaning the inside of a paint transfer pipe, which is characterized by:
ある第１項記載の方法。2. The method according to claim 1, wherein the paint removing agent is a solution of an alkali in an aqueous solvent.
おこなう第１項記載の方法。4. The method according to claim 1, wherein the flushing treatment is performed using an aqueous solution of a rust preventive agent.
いておこなう第１項記載の方法。5. The method according to claim 1, wherein the water replacement treatment is carried out using a water-soluble low boiling point organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62089076A JPH0626697B2 (en) | 1987-04-10 | 1987-04-10 | Cleaning method for paint transfer pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62089076A JPH0626697B2 (en) | 1987-04-10 | 1987-04-10 | Cleaning method for paint transfer pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63256163A JPS63256163A (en) | 1988-10-24 |
| JPH0626697B2 true JPH0626697B2 (en) | 1994-04-13 |
Family
ID=13960769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62089076A Expired - Lifetime JPH0626697B2 (en) | 1987-04-10 | 1987-04-10 | Cleaning method for paint transfer pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626697B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2549790B2 (en) * | 1992-01-16 | 1996-10-30 | 日産自動車株式会社 | Composition for removing deposits in paint piping |
| JP4910276B2 (en) * | 2003-10-09 | 2012-04-04 | 凸版印刷株式会社 | Coating device having cleaning mechanism |
| JP4910272B2 (en) * | 2004-09-08 | 2012-04-04 | 凸版印刷株式会社 | Coating apparatus having cleaning mechanism and cleaning method |
| JP5391051B2 (en) * | 2009-12-22 | 2014-01-15 | 花王株式会社 | Deposit removal method |
| CA3222419A1 (en) * | 2021-07-02 | 2023-01-05 | Kansai Paint Co., Ltd. | Aqueous coating material composition and coated article using same, and multilayer coating film forming method |
| CN115283374B (en) * | 2022-07-22 | 2023-07-18 | 东风柳州汽车有限公司 | Cleaning method of solvent type paint conveying system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930149B2 (en) * | 1981-03-26 | 1984-07-25 | トヨタ自動車株式会社 | Paint transport piping cleaning method |
-
1987
- 1987-04-10 JP JP62089076A patent/JPH0626697B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63256163A (en) | 1988-10-24 |
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