JP3026320B2 - Pretreatment equipment for painting - Google Patents
Pretreatment equipment for paintingInfo
- Publication number
- JP3026320B2 JP3026320B2 JP4254907A JP25490792A JP3026320B2 JP 3026320 B2 JP3026320 B2 JP 3026320B2 JP 4254907 A JP4254907 A JP 4254907A JP 25490792 A JP25490792 A JP 25490792A JP 3026320 B2 JP3026320 B2 JP 3026320B2
- Authority
- JP
- Japan
- Prior art keywords
- chemical conversion
- cleaning
- conversion treatment
- coating
- vehicle body
- 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
Landscapes
- Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、脱脂工程、化成処理工
程及び洗浄工程等を有し、電着塗装がなされる被塗物に
対する前処理装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pretreatment apparatus for an object to be electrodeposited, which has a degreasing step, a chemical conversion step, a cleaning step and the like.
【０００２】[0002]
【従来の技術】自動車車体の塗装工程は、通常、電着塗
装による下塗り塗装工程と、それぞれ主として静電塗装
による中塗り及び上塗り塗装工程とを有しており、これ
らの塗装がなされる自動車車体は、塗装工程に搬入され
る前に、予め前処理工程において所定の処理がなされ
る。この前処理工程は、車体に付着している油類を除去
すると共に鋼板面に化学的に安定な無機質膜を形成させ
ることにより、鋼板面を不活性化し防錆力を与えると共
に鋼板と塗膜との付着性を助けるための工程であって、
車体に付着した油分を除去するための脱脂工程と、被塗
物に化成処理膜を形成する化成処理工程と、これらの工
程が終了した後に車体を洗浄する洗浄工程とを有してい
る。このことは、例えば自動車工学全書第１９巻「自動
車の製造方法」昭和５５年４月２０日；株式会社山海堂
発行の第２０２頁〜第２０８頁塗装設備の項目の中で紹
介されている。2. Description of the Related Art The coating process of an automobile body usually includes an undercoating process by electrodeposition coating and an intermediate coating and a topcoating process mainly by electrostatic coating, respectively. Before being carried into the painting process, a predetermined process is performed in advance in the pretreatment process. This pre-treatment process removes oils adhering to the vehicle body and forms a chemically stable inorganic film on the steel plate surface, inactivating the steel plate surface, giving rust prevention, A process to help adherence with
The method includes a degreasing step for removing oil adhering to the vehicle body, a chemical conversion step for forming a chemical conversion film on the object to be coated, and a cleaning step for cleaning the vehicle body after these steps are completed. This is introduced, for example, in the section of painting equipment, Vol. 19, "Automotive Manufacturing Method", April 20, 1980; Sankaido Co., Ltd., pp. 202-208.
【０００３】[0003]
【発明が解決しようとする課題】前記化成処理工程は、
ディップ式の化成処理槽を有しており、この処理槽内に
車体をどぶ付けした後に、スプレー式の洗浄工程におい
て車体は洗浄されることになる。この洗浄工程は複数の
工程有しており、この工程では、化成処理槽内において
車体に付着したスラッジや鉄粉等が除去される。しかし
ながら、従来の前処理装置にあっては、化成処理装丁の
後に設けられた洗浄工程では、充分にスラッジや鉄粉等
が除去されずに、被塗物の表面に残留することがあっ
た。このため、鉄粉やスラッジが被塗物に付着したまま
の状態で後の塗装工程にまで被塗物が搬送されることが
あり、塗装品質が良好とならない場合があった。本発明
は上記従来技術の問題点に鑑みてなされたものであり、
塗装工程に搬入される前に、前処理工程において、化成
処理工程において被塗物に付着したスラッジや、化成処
理工程にまで除去されなかった鉄粉を確実に除去するよ
うにして塗装品質を向上させるようにすることを目的と
する。The chemical conversion treatment step comprises:
It has a dip-type chemical conversion treatment tank, and after the body is thrown into this treatment tank, the body is washed in a spray-type washing step. This washing step includes a plurality of steps, and in this step, sludge, iron powder, and the like adhering to the vehicle body in the chemical conversion treatment tank are removed. However, in the conventional pretreatment apparatus, in the washing process provided after the chemical conversion binding, sludge, iron powder, and the like may not be sufficiently removed and may remain on the surface of the article to be coated. For this reason, the object to be coated may be transported to the subsequent coating step in a state where the iron powder and the sludge remain attached to the object to be coated, and the coating quality may not be good. The present invention has been made in view of the above-mentioned problems of the prior art,
Improves coating quality by ensuring that sludge adhering to the object to be coated in the chemical conversion process and iron powder that has not been removed until the chemical conversion process are removed in the pretreatment process before being carried into the coating process. The purpose is to let them.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
の本発明は、化成処理工程とこの化成処理工程を終了し
た後の被塗物を洗浄する複数の洗浄工程を有し、塗装装
置に搬入される被塗物に対して化成処理等の前処理を行
なう塗装の前処理装置において、前記化成処理工程から
洗浄工程を少なくとも一つ以上介した下流側の工程に、
他の洗浄工程で使用される液圧よりも高い５Ｋｇ／ｃｍ
２以上の液圧の洗浄液を被塗物表面に吹付けるノズルを
設けたことを特徴とする塗装の前処理装置である。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a chemical conversion treatment step and a plurality of cleaning steps for cleaning an object to be coated after the chemical conversion treatment step is completed. in the processing apparatus before the preprocessing is performed painting of chemical conversion treatment or the like on a coating object which is carried from the chemical conversion treatment step
In a downstream step through at least one or more washing steps ,
5 kg / cm higher than the hydraulic pressure used in other cleaning steps
A pretreatment apparatus for coating, comprising: a nozzle for spraying a cleaning liquid having two or more hydraulic pressures onto a surface of an object to be coated.
【０００５】[0005]
【作用】上記構成の本発明にあっては、化成処理工程を
終了した後の車体に対して、化成処理工程から洗浄工程
を少なくとも一つ以上介した下流側の工程で、他の洗浄
工程で使用される液圧よりも高い５Ｋｇ／ｃｍ２以上の
液圧の洗浄液が吹き付けられることになる。したがっ
て、化成処理後の車体の表面に鉄粉やスラッジ等が付着
していても、これらは確実に除去されることになり、後
の塗装工程を終了した車体の塗装品質が大幅に向上する
と共に、塗装欠陥の発生が大幅に低減された。ここで、
５Ｋｇ／ｃｍ２以上としたのは、この数値を下回ると洗
浄の効果が大幅に低下するからである。また、このよう
な５Ｋｇ／ｃｍ２以上の液圧の洗浄液を吹き付ける工程
を、化成処理工程から洗浄工程を少なくとも一つ以上介
した下流側の工程としたので、吹き付けられた洗浄液が
霧状となって化成処理槽内に戻ることが防止される。According to the present invention having the above-described structure, the vehicle body after the chemical conversion treatment step is completed is subjected to the chemical conversion treatment step and the cleaning step.
5Kg / cm 2 or more, which is higher than the hydraulic pressure used in the other washing steps in the downstream step through at least one
A hydraulic cleaning solution is sprayed. Therefore, even if iron powder, sludge, etc. adhere to the surface of the vehicle body after the chemical conversion treatment, these are surely removed, and the coating quality of the vehicle body after the subsequent coating process is greatly improved, and In addition, the occurrence of paint defects was greatly reduced. here,
The reason for setting the value to 5 kg / cm 2 or more is that if the value is less than this value, the cleaning effect is significantly reduced. In addition, the step of spraying such a cleaning liquid having a liquid pressure of 5 kg / cm 2 or more includes at least one cleaning step from the chemical conversion step.
Since the cleaning step is performed on the downstream side , the sprayed cleaning liquid is prevented from returning to the inside of the chemical conversion treatment tank in the form of mist.
【０００６】[0006]
【実施例】図１及び図２は本発明の前処理装置の一実施
例を示す図であり、図１は前処理装置の前半部を示し、
図２はその後半部を示す。図１及び図２に示されるよう
に、本発明の前処理装置は、被塗物である車体Ｂを吊り
下げた状態で搬送するコンベア１０に沿って、予備洗浄
工程１１、予備脱脂工程１２、脱脂工程１３が配置され
ており、車体組立てラインにおいて組立てが完了した後
の車体は、コンベア１０によってこの順に各工程に搬送
され、それぞれの処理がなされる。脱脂工程１３を通過
した被塗物はスプレーによる水洗工程１４、１５におい
て洗浄がなされた後に、表面調整工程１６に送られる。1 and 2 show an embodiment of a pre-processing apparatus according to the present invention. FIG. 1 shows a first half of the pre-processing apparatus.
FIG. 2 shows the latter half. As shown in FIGS. 1 and 2, the pretreatment apparatus of the present invention includes a pre-cleaning step 11, a pre-degreasing step 12, and a pre-cleaning step 11 along a conveyor 10 that conveys a body B to be coated in a suspended state. A degreasing process 13 is arranged, and the vehicle body after the assembly is completed in the vehicle body assembly line is conveyed to each process by the conveyor 10 in this order, and each process is performed. The object to be coated that has passed through the degreasing step 13 is sent to a surface adjusting step 16 after being washed in water washing steps 14 and 15 by spraying.
【０００７】この表面調整工程１６を通過した被塗物
は、図２に示される化成処理工程１７に投入された後
に、スプレー式による水洗工程１８、１９を通過してデ
ィップ式の水洗工程２０に投入される。更に、スプレー
による純水洗工程２１を経て、図外の電着塗装工程に被
塗物は搬送される。図１及び図２において符号Ｐはそれ
ぞれポンプを示し、各々の工程における液体収容槽及び
デップ槽内の液体は、循環使用されるようになってい
る。The article to be coated that has passed through the surface conditioning step 16 is supplied to a chemical conversion treatment step 17 shown in FIG. 2, and then passes through spray-type washing steps 18 and 19 to a dip-type washing step 20. It is thrown. Further, the object to be coated is transported to a non-illustrated electrodeposition coating step via a pure water washing step 21 by spraying. In FIGS. 1 and 2, the symbol P indicates a pump, and the liquid in the liquid storage tank and the dep tank in each step is circulated and used.
【０００８】図示実施例にあっては、化成処理工程１７
の下流側に、この工程を経た車体Ｂを洗浄するためのス
プレー式の洗浄工程が２工程設けられており、第２工程
目の洗浄工程１９には、高圧の洗浄ノズル２５が設けら
れている。この洗浄ノズル２５は、貯留槽２６に接続さ
れた循環路２７の先端に接続されており、この循環路２
７に設けられたポンプＰにより貯留槽２６内の洗浄液が
供給される。また、このノズル２５には空気も供給され
るようになっており、洗浄液と空気との混合流体がノズ
ル２５から車体Ｂの表面に向けて吹き付けられる。上述
のように、化成処理工程の直ぐ次の洗浄工程１８に高圧
ノズル２５を設けなかったのは、高い圧力の流体を車体
Ｂに吹き付けると、吹付けられた洗浄液が霧状となって
化成処理槽内に戻ることがあるからである。図示するよ
うに、第２番目の洗浄工程に高圧ノズル２５を設ける
と、この位置は化成処理工程１７の後端部から５ｍ以上
離れることになり、霧状の洗浄液が化成処理工程まで戻
ることが防止される。In the illustrated embodiment, a chemical conversion treatment step 17
Is provided with two spray-type cleaning steps for cleaning the vehicle body B that has gone through this step. In the second cleaning step 19, a high-pressure cleaning nozzle 25 is provided. . The cleaning nozzle 25 is connected to the tip of a circulation path 27 connected to a storage tank 26.
The cleaning liquid in the storage tank 26 is supplied by a pump P provided in 7. Air is also supplied to the nozzle 25, and a mixed fluid of the cleaning liquid and the air is blown from the nozzle 25 toward the surface of the vehicle body B. As described above, the high-pressure nozzle 25 is not provided in the cleaning step 18 immediately after the chemical conversion step because, when a high-pressure fluid is sprayed on the vehicle body B, the sprayed cleaning liquid becomes mist and becomes a mist. This is because it may return into the tank. As shown in the drawing, when the high-pressure nozzle 25 is provided in the second cleaning step, this position is separated from the rear end of the chemical conversion treatment step 17 by 5 m or more, and the mist-like cleaning liquid returns to the chemical conversion treatment step. Is prevented.
【０００９】図３はこの洗浄ノズル２５の詳細を示す図
であり、ノズル本体２５ａには前記循環路２６が接続さ
れると共に、その側面には空圧源２８に接続された空圧
パイプ２９が接続されてるいる。このノズル２５から吐
出される混合流体の圧力は、５ Kg/cm2 以上の高い圧力
に設定されている。また、洗浄ノズル２５は、車体の両
側に対応して設けられており、それぞれの洗浄ノズル２
５は上下方向に複数配置されている。したがって、車体
がコンベア１０により搬送される過程で、車体の外周面
に混合流体が吹き付けられる。更に、車体の上面及び底
面に向けて混合流体を吹き付けるようにしても良い。FIG. 3 is a view showing details of the cleaning nozzle 25. The circulation path 26 is connected to the nozzle body 25a, and a pneumatic pipe 29 connected to a pneumatic source 28 is provided on a side surface thereof. Connected. The pressure of the mixed fluid discharged from the nozzle 25 is set to a high pressure of 5 kg / cm 2 or more. Further, the cleaning nozzles 25 are provided corresponding to both sides of the vehicle body.
A plurality 5 is arranged in the up-down direction. Therefore, the mixed fluid is sprayed on the outer peripheral surface of the vehicle body while the vehicle body is being conveyed by the conveyor 10. Further, the mixed fluid may be sprayed toward the upper and lower surfaces of the vehicle body.
【００１０】図４は化成処工程１７を通過した時におけ
る車体外周面の一部を示す断面図であり、化成処理がな
されることにより、車体Ｂの外周面にはリン酸亜鉛Ｅの
被膜が形成されている。そして、化成処理工程において
化成処理液内に含まれていたスラッジＦや鉄粉Ｇがりん
酸亜鉛Ｅの被膜の上に付着することがある。ところが、
上述したように、高圧ノズル２５から上述した圧力の混
合流体が車体Ｂの表面に吹き付けられると、スラッジＦ
と鉄粉Ｇが除去される。実験によれば、この高圧ノズル
２５を設けた場合には、設けない場合に比して、塗装工
程におけるスラッジＦ等の存在に起因した塗装欠陥が６
０％減少した。FIG. 4 is a cross-sectional view showing a part of the outer peripheral surface of the vehicle body after passing through the chemical conversion treatment step 17, and the outer surface of the vehicle body B is coated with zinc phosphate E by the chemical conversion treatment. Is formed. Then, in the chemical conversion treatment step, sludge F and iron powder G contained in the chemical conversion treatment liquid may adhere to the zinc phosphate E coating. However,
As described above, when the mixed fluid having the above-described pressure is sprayed onto the surface of the vehicle body B from the high-pressure nozzle 25, the sludge F
And the iron powder G is removed. According to the experiment, when the high-pressure nozzle 25 is provided, compared with the case where the high-pressure nozzle 25 is not provided, the coating defect caused by the presence of the sludge F or the like in the coating process is 6%.
It decreased by 0%.
【００１１】[0011]
【発明の効果】以上のように、本発明によれば、化成処
理終了後の被塗物に対して、化成処理工程から洗浄工程
を少なくとも一つ以上介した下流側の工程で、他の洗浄
工程で使用される液圧よりも高い５Ｋｇ／ｃｍ ２ 以上の
液圧の流体を、被塗物表面に吹き付けるようにしたの
で、洗浄液が高圧噴射で霧状となって化成処理工程まで
戻ることを防止しつつ、車体に付着した鉄粉やスラッジ
が確実に除去されて、後の塗装工程における塗装欠陥の
発生が大幅に低減し、塗装品質が大幅に向上した。As described above, according to the present invention, the substrate to be coated after the chemical conversion treatment is subjected to the chemical conversion treatment step and the cleaning step.
5Kg / cm 2 or more, which is higher than the hydraulic pressure used in the other washing steps in the downstream step through at least one
Hydraulic fluid is sprayed onto the surface of the object to be coated, so that the cleaning liquid is prevented from returning to the chemical conversion process in the form of a mist due to high-pressure injection, while iron powder and sludge adhering to the vehicle body are reliably removed. As a result, the occurrence of coating defects in the subsequent coating process has been greatly reduced, and the coating quality has been greatly improved.
【図１】は本発明の一実施例に係る塗装の前処理装置の
前段部分を示す概略図、FIG. 1 is a schematic diagram showing a front part of a coating pretreatment device according to an embodiment of the present invention;
【図２】は本発明の一実施例に係る塗装の前処理装置の
後段部分を示す概略図、FIG. 2 is a schematic diagram showing a rear part of a coating pretreatment device according to one embodiment of the present invention;
【図３】は高圧ノズルを示す正面図、FIG. 3 is a front view showing a high-pressure nozzle;
【図４】は化成処理後の被塗物の正面を示す断面図であ
る。FIG. 4 is a cross-sectional view showing a front surface of a substrate after a chemical conversion treatment.
１７…化成処理工程、１８、１９…洗浄工程、２５…高
圧のノズル、Ｂ…車体（被塗物）。17: chemical conversion treatment step, 18, 19: cleaning step, 25: high-pressure nozzle, B: vehicle body (object to be coated).
───────────────────────────────────────────────────── フロントページの続き (72)発明者 代田 隆大 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (72)発明者 深江 昭義 神奈川県横浜市神奈川区宝町２番地 日 産自動車株式会社内 (56)参考文献 実開 昭63−2773（ＪＰ，Ｕ) 実開 平３−59369（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takahiro Shiroda 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture Inside Nissan Motor Co., Ltd. (72) Inventor Akiyoshi Fukae 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Nissan Motor Co., Ltd. In-house (56) References JP-A 63-2773 (JP, U) JP-A 3-59369 (JP, U)
Claims (1)
した後の被塗物を洗浄する複数の洗浄工程を有し、塗装
装置に搬入される被塗物に対して化成処理等の前処理を
行なう塗装の前処理装置において、前記化成処理工程か
ら洗浄工程を少なくとも一つ以上介した下流側の工程
に、他の洗浄工程で使用される液圧よりも高い５Ｋｇ／
ｃｍ２以上の液圧の洗浄液を被塗物表面に吹付けるノズ
ルを設けたことを特徴とする塗装の前処理装置。1. A chemical conversion treatment step and a plurality of cleaning steps for cleaning an object to be coated after the chemical conversion treatment step is completed, and a pretreatment such as a chemical conversion treatment for an object to be carried into a coating apparatus. in the processing apparatus before the painting performing, either the chemical conversion treatment step
5 kg / g, which is higher than the hydraulic pressure used in other washing steps, in a downstream step through at least one washing step.
A pretreatment apparatus for coating, comprising a nozzle for spraying a cleaning liquid having a liquid pressure of not less than 2 cm 2 onto the surface of the object to be coated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4254907A JP3026320B2 (en) | 1992-09-24 | 1992-09-24 | Pretreatment equipment for painting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4254907A JP3026320B2 (en) | 1992-09-24 | 1992-09-24 | Pretreatment equipment for painting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0699115A JPH0699115A (en) | 1994-04-12 |
| JP3026320B2 true JP3026320B2 (en) | 2000-03-27 |
Family
ID=17271509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4254907A Expired - Lifetime JP3026320B2 (en) | 1992-09-24 | 1992-09-24 | Pretreatment equipment for painting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3026320B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0111727Y2 (en) * | 1986-06-24 | 1989-04-06 | ||
| JP3059369U (en) * | 1998-11-26 | 1999-07-09 | 建準電機工業股▲分▼有限公司 | Structure of heat dissipation fan |
-
1992
- 1992-09-24 JP JP4254907A patent/JP3026320B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0699115A (en) | 1994-04-12 |
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