JP2724631B2 - Method for controlling coating thickness of flow coater - Google Patents
Method for controlling coating thickness of flow coaterInfo
- Publication number
- JP2724631B2 JP2724631B2 JP2168311A JP16831190A JP2724631B2 JP 2724631 B2 JP2724631 B2 JP 2724631B2 JP 2168311 A JP2168311 A JP 2168311A JP 16831190 A JP16831190 A JP 16831190A JP 2724631 B2 JP2724631 B2 JP 2724631B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- film thickness
- coating
- thickness
- flow coater
- 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
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Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、フローコータの塗装膜厚制御方法に関す
る。Description: TECHNICAL FIELD The present invention relates to a method for controlling a coating thickness of a flow coater.
［従来の技術］ 従来、カーテンフローによる塗装方式として、ローラ
ー方式によるものがあり、特開昭63−80876号公報に
は、その塗装膜厚制御方法が提案されている。このロー
ラー方式によるものは、ロールとその駆動部を必要とし
て構造複雑であること、ロール回転数の精度が低下した
場合に塗料カーテンが不安定となり易いため保守性が悪
いこと、同一ラインで多種類の塗料を使用していてロッ
ト替えする時に上述の構造複雑部分の洗浄に時間を要し
て生産性が低下すること等の問題点がある。[Prior Art] Conventionally, there is a roller system as a coating system using a curtain flow, and Japanese Patent Application Laid-Open No. 63-80876 proposes a coating film thickness control method. The roller method requires a roll and a drive unit, which is complicated in structure, and when the accuracy of the number of rotations of the roll is reduced, the paint curtain tends to become unstable, so that the maintainability is poor. When the lot is changed using the above-mentioned paint, there is a problem that it takes a long time to clean the above-mentioned complicated structure and the productivity is lowered.
そこで従来、構造の簡素化、保守性の容易化、生産性
の向上を実現できる塗装方式として、第４図に示す如く
のフローコータが採用されている。このフローコータ
は、塗料供給ヘッダ１のノズル1Aの隙間より塗料カーテ
ン２を流下せしめ、塗料カーテン２が垂下する塗装領域
の前後に、被塗装物３を搬送するための前面コンベヤ4A
と後面コンベヤ4Bとを離隔配置して構成されている。そ
して、このフローコータは、ノズル1Aより一定静圧で垂
下する塗料カーテン２中を、コンベヤ4A、4Bにより被塗
装物３を一定速度で通過させ、被塗装物３の上面に所定
の塗膜を生成させるものである。Therefore, conventionally, a flow coater as shown in FIG. 4 has been adopted as a coating method capable of realizing the simplification of the structure, the easy maintenance, and the improvement of the productivity. This flow coater allows a paint curtain 2 to flow down from a gap between nozzles 1A of a paint supply header 1 and a front conveyor 4A for transporting an object 3 before and after a coating area where the paint curtain 2 hangs.
And the rear conveyor 4B are spaced apart from each other. Then, the flow coater passes the workpiece 3 at a constant speed by the conveyors 4A and 4B through the paint curtain 2 hanging at a constant static pressure from the nozzle 1A, and applies a predetermined coating film on the upper surface of the workpiece 3. Is to be generated.
［発明が解決しようとする課題］ 上述のフローコータにおいて、被塗装物３に塗装され
る塗料の膜厚δの調整は、第３図に示す如く、塗装速度
（＝コンベヤ搬送速度）Ｖ、ノズル隙間を変化させるこ
とにより可能である。ここで、コンベヤ4A、4Bの搬送速
度、ノズル1Aの隙間等を一定の条件としておけば、膜厚
は一定に保つことができる。[Problems to be Solved by the Invention] In the flow coater described above, the adjustment of the film thickness δ of the coating material to be coated on the work 3 is performed by the coating speed (= conveyor conveying speed) V, the nozzle, as shown in FIG. This is possible by changing the gap. Here, if the conveying speed of the conveyors 4A and 4B, the gap between the nozzles 1A, and the like are set as constant conditions, the film thickness can be kept constant.
ところが、塗料は通常、シンナー等により希釈されて
いるため、シンナーの蒸発や塗装領域の温度変動等の周
囲の条件変動により、塗料の性状（粘度、固形物の濃度
等）が変化し、それが、ノズル隙間よりの塗料流出量の
変化となり、膜厚が変化する。However, paint is usually diluted with thinner or the like, and the properties (viscosity, concentration of solids, etc.) of the paint change due to fluctuations in surrounding conditions such as evaporation of the thinner and temperature fluctuations in the coating area. Then, the amount of paint flowing out from the nozzle gap changes, and the film thickness changes.
この時、塗料の供給系（塗料供給タンク〜フローコー
タの塗料供給ヘッダ）において、例えば、塗料供給タン
クに冷却、加熱装置を設置することにより、常に塗料の
温度を一定にし、前述の塗料の性状の変化による膜厚の
変化を制御する方法が考えられる。然しながら、この様
な方法は、小ロットで非常に多数の塗料を使用するライ
ンにおいては、ロット替えに伴うタンク内の洗浄作業性
が悪くなるという問題点がある。At this time, in the paint supply system (the paint supply tank to the paint supply header of the flow coater), for example, by installing a cooling and heating device in the paint supply tank, the temperature of the paint is always kept constant, A method of controlling the change in the film thickness due to the change in the thickness can be considered. However, such a method has a problem that in a line using a very large number of paints in a small lot, the workability of cleaning the inside of the tank due to the lot change is deteriorated.
又、塗装領域のある塗装室内の温度を常に一定に保つ
方法も考えられる。然しながら、この場合、大容量であ
る塗装室内の温度を制御するため、加熱、冷却装置、及
び温度の制御装置が膨大になるという問題点がある。A method is also conceivable in which the temperature in the coating room having the coating area is always kept constant. However, in this case, there is a problem in that the heating, cooling devices, and temperature control devices become enormous in order to control the temperature in the large-capacity coating room.
本発明は、フローコータにおいて、簡素な設備によ
り、煩雑な作業を伴うことなく、被塗装物に塗装される
塗料の膜厚を高精度に制御することを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to control the thickness of a paint applied to an object to be coated with high accuracy by a simple facility without complicated work in a flow coater.
［課題を解決するための手段］ 本発明は、塗料供給ヘッダのノズル隙間より塗料カー
テンを流下せしめ、塗料カーテンが垂下する塗装領域の
前後に、被塗装物搬送用の前面コンベヤと後面コンベヤ
とを離隔配置して構成されるフローコータの塗装膜厚制
御方法において、塗装領域の出側に設けた膜厚計により
被塗装物に塗装された塗料の膜厚を測定するとともに、
塗料カーテンのための塗料の供給系に設けた粘土計によ
り塗料の粘度を測定し、膜厚と粘度の測定データに基づ
いて、被塗装物に塗装される塗料の膜厚が目標膜厚とな
るように、前面コンベヤと後面コンベヤの搬送速度を調
整するようにしたものである。Means for Solving the Problems According to the present invention, a paint curtain is caused to flow down from a nozzle gap of a paint supply header, and before and after a coating area where the paint curtain hangs, a front conveyor and a rear conveyor for conveying an object to be coated are provided. In the coating thickness control method of the flow coater configured to be spaced apart, while measuring the thickness of the coating applied to the object to be coated by a thickness gauge provided on the exit side of the coating area,
The viscosity of the paint is measured by a clay meter provided in the paint supply system for the paint curtain, and based on the measurement data of the film thickness and the viscosity, the film thickness of the paint applied to the workpiece becomes the target film thickness. Thus, the transport speeds of the front conveyor and the rear conveyor are adjusted.
［作用］ ノズル隙間よりの単位時間、単位幅当たりの塗料流出
量Ｑは、被塗装物を搬送するコンベヤの搬送速度（以
下、塗装速度）Ｖと膜厚δとの間に下記（１）式の関係
がある。[Effect] The paint outflow amount Q per unit time and unit width from the nozzle gap is defined by the following formula (1) between the transport speed (hereinafter, coating speed) V of the conveyor that transports the workpiece and the film thickness δ. There is a relationship.
Ｑ＝δ×Ｖ ……（１） 即ち、上記（１）は、ノズル隙間を一定にし、塗料流
出量Ｑを一定にすれば、塗装速度Ｖを変化させることに
より、膜厚δを自在に変化させることができることを示
している。Q = δ × V (1) That is, in the above (1), if the nozzle gap is fixed and the paint outflow amount Q is constant, the coating speed V is changed to freely change the film thickness δ. Indicates that it can be done.
又、塗料の性状の変動により、塗料の流出量Ｑが変動
した場合、それに応じて塗装速度Ｖを変化させれば、膜
厚δを一定にすることが可能となる。In addition, when the outflow amount Q of the paint fluctuates due to a change in the properties of the paint, the film thickness δ can be made constant by changing the coating speed V accordingly.
一方、第２図にノズル隙間を一定とした場合の粘度と
膜厚の関係を示す。これは、上記（１）式においてノズ
ル隙間からの流出量Ｑが粘度により変化することを示し
ている。従って、粘度νと膜厚δと塗装速度Ｖとの関係
を予め測定することにより下記（２）式の関係を得るこ
とができる。但し、ｘはノズル隙間である。On the other hand, FIG. 2 shows the relationship between the viscosity and the film thickness when the nozzle gap is constant. This indicates that in the above equation (1), the outflow amount Q from the nozzle gap changes depending on the viscosity. Therefore, the relationship of the following formula (2) can be obtained by measuring the relationship between the viscosity ν, the film thickness δ, and the coating speed V in advance. Here, x is a nozzle gap.
Ｑ＝（ν,x）＝δ×Ｖ ……（２） 更に、上記（２）式より粘度変化による膜厚の変化の
関係式として、下記（３）式が得られる。Q = (ν, x) = δ × V (2) Further, from the above equation (2), the following equation (3) is obtained as a relational equation of a change in film thickness due to a change in viscosity.
即ち、フローコータにおいては、上記（３）式が成立
するから、本発明における如く膜厚と粘度の測定データ
に基づいて、前面コンベヤと後面コンベヤの搬送速度を
調整することのみにより、被塗装物に塗装される塗料の
膜厚を目標膜厚に設定できる。従って、本発明によれ
ば、フローコータにおいて、簡素な設備により、煩雑な
作業を伴うことなく、被塗装物に塗装される塗料の膜厚
を高精度に制御することができる。 That is, in the flow coater, since the above equation (3) is satisfied, the object to be coated is adjusted only by adjusting the transport speeds of the front conveyor and the rear conveyor based on the measurement data of the film thickness and the viscosity as in the present invention. The thickness of the paint to be applied to the target can be set to the target thickness. Therefore, according to the present invention, in a flow coater, the film thickness of a paint applied to an object to be coated can be controlled with high accuracy by simple equipment without complicated work.
［実施例］ 第１図は本発明が適用されるフローコータの一例を示
す制御系統図、第２図は膜厚と粘度と塗装速度との関係
を示す線図、第３図は膜厚とノズル隙間と塗装速度との
関係を示す線図、第４図はフローコータを示す模式図で
ある。[Example] FIG. 1 is a control system diagram showing an example of a flow coater to which the present invention is applied, FIG. 2 is a diagram showing a relationship between film thickness, viscosity and coating speed, and FIG. FIG. 4 is a diagram showing the relationship between the nozzle gap and the coating speed, and FIG. 4 is a schematic diagram showing a flow coater.
フローコータ10は、第１図に示す如く、塗料供給ヘッ
ダ11のノズル11Aの隙間より塗料カーテン12を流下せし
め、塗料カーテン12が垂下する塗装領域の前後に、被塗
装物13を搬送するための前面コンベヤ14Aと後面コンベ
ヤ14Bとを離隔配置している。As shown in FIG. 1, the flow coater 10 allows the paint curtain 12 to flow down from the gap between the nozzles 11A of the paint supply header 11 and transports the workpiece 13 before and after the coating area where the paint curtain 12 hangs down. The front conveyor 14A and the rear conveyor 14B are spaced apart.
15は塗料供給タンク、16は塗料回収用受皿であり、タ
ンク15からヘッダ11に塗料供給管路17が設けられ、受皿
16からタンク15に塗料回収管路18が設けられている。Reference numeral 15 denotes a paint supply tank, 16 denotes a paint collection tray, and a paint supply pipe 17 is provided from the tank 15 to the header 11, and a tray is provided.
A paint collection line 18 is provided from 16 to the tank 15.
19はコンベヤ14A、14Bの駆動モータであり、モータ19
はコンベヤ14A、14Bの搬送速度を高精度に加減速制御で
きる。Reference numeral 19 denotes a drive motor for the conveyors 14A and 14B.
Can control the transport speed of the conveyors 14A and 14B with high accuracy.
然して、フローコータ10は、塗装領域の出側に膜厚計
21を設けてある。膜厚計21は、被塗装物13に塗装された
塗料の膜厚を測定する。However, the flow coater 10 has a thickness gauge on the exit side of the coating area.
21 are provided. The film thickness meter 21 measures the film thickness of the paint applied to the work 13.
又、フローコータ10は、塗料供給管路17に粘度計22を
設けてある。粘度計22は塗料の粘度を測定する。Further, the flow coater 10 is provided with a viscometer 22 in the paint supply line 17. The viscometer 22 measures the viscosity of the paint.
又、フローコータ10は演算装置23を有している。演算
装置23は、膜厚計21の測定データと粘度計22の測定デー
タを転送され、後述する如くの演算動作により、被塗装
物13に塗装される塗料の膜厚が目標膜厚となるに必要な
コンベヤ14A、14Bの速度修正量を演算し、コンベヤ14
A、14Bの駆動モータ19を制御する。Further, the flow coater 10 has an arithmetic unit 23. The arithmetic unit 23 receives the measurement data of the film thickness meter 21 and the measurement data of the viscometer 22, and performs an arithmetic operation as described below so that the film thickness of the paint applied to the object 13 reaches the target film thickness. The required amount of speed correction for the conveyors 14A and 14B is calculated, and the conveyor 14
A and 14B drive motors 19 are controlled.
以下、演算装置23によりコンベヤ14A、14Bの搬送速度
を調整し、被塗装物13に塗装される塗料の膜厚を制御す
る制御手順の一例について説明する。Hereinafter, an example of a control procedure for adjusting the transport speed of the conveyors 14A and 14B by the arithmetic unit 23 and controlling the film thickness of the paint applied to the workpiece 13 will be described.
（１）予め、ノズル11Aの隙間x0を測定しておく。(1) is previously measured gap x 0 of the nozzle 11A.
（２）塗料替後、第１枚目の被塗装物13の塗装において
は、以下の方法で塗装速度（＝コンベヤ14A、14Bの搬送
速度）の設定を行なう。(2) After the paint is changed, in the coating of the first object 13 to be coated, the coating speed (= transport speed of the conveyors 14A and 14B) is set by the following method.
粘度計22により塗料の粘度ν０を測定する。The viscosity ν 0 of the paint is measured by a viscometer 22.
目標膜厚をδｐとする時、前記（２）式を用いて下記
（４）式の演算を行ない、塗装速度Ｖを決定し、設定す
る。When the target film thickness is δp, the following formula (4) is used to calculate the coating speed V using the above formula (2) to determine and set the coating speed V.
Ｖ＝Ｑ（x0,ν０）／δｐ ……（４） （３）第２枚目以降の被塗装物13の塗装においては、以
下の方法で塗装速度（コンベヤ14A、14Bの搬送速度）の
設定を行なう。V = Q (x 0 , v 0 ) / δp (4) (3) In the coating of the second and subsequent objects 13 to be coated, the coating speed (conveying speed of the conveyors 14A and 14B) is determined by the following method. Make the settings for
膜厚計21により、第１枚目の被塗装物13に塗装された
塗料の膜厚δ０を測定する。The film thickness δ 0 of the paint applied to the first object 13 is measured by the film thickness meter 21.
第１枚目の被塗装物13の塗装速度V0、及び塗料の粘度
ν０は、第１枚目の塗装時に予め測定したデータを演算
装置23にメモリーしておく。As for the coating speed V 0 of the first coated object 13 and the viscosity ν 0 of the coating material, data measured in advance at the time of the first coating is stored in the arithmetic unit 23 in advance.
演算装置23にて下記（５）式の演算を行なう。The arithmetic unit 23 performs the arithmetic operation of the following equation (5).
ｑ＝δ０・V0 ……（５） 次に、粘度計22により塗料の粘度の現在値ν０′を測
定、下記（６）式の演算を行なう。q = δ 0 · V 0 (5) Next, the current value ν 0 ′ of the viscosity of the paint is measured by the viscometer 22, and the following equation (6) is calculated.
次に、上記（６）式で求めたｑ′を用いて、前述
（１）式の関係に基づき、下記（７）式により塗装速度
Ｖを求める。 Next, the coating speed V is calculated by the following equation (7) based on the relationship of the above-described equation (1) using q ′ obtained by the above equation (6).
Ｖ＝ｑ′／δｐ ……（７） 尚、本発明にあっては、上述の（５）式で求めたｑ
を用い、Ｖ＝q/δｐにより塗装速度Ｖを求めることもで
きる。但し、この実施例にあっては、同一塗料による塗
装中、入側と出側のシートの段取等（ロット替等）で小
さなダウンタイムが発生するので、上記の（６）式に
よる補正を行なっているのである。V = q ′ / δp (7) In the present invention, q obtained by the above equation (5)
And the coating speed V can be obtained from V = q / δp. However, in this embodiment, during coating with the same paint, a small downtime occurs due to the setup of the sheet on the entrance side and the sheet on the exit side (lot change, etc.). It is doing.
然して、塗装速度の現在値をV0′とする時、その速度
修正量ΔＶは下記（８）式で得られる。尚、αは制御ゲ
インである。However, when the current value of the coating speed is V 0 ′, the speed correction amount ΔV is obtained by the following equation (8). Here, α is a control gain.
ΔＶ＝（Ｖ−V0′）×α ……（８） 演算装置23よりコンベヤ14A、14Bの駆動モータ19に塗
装速度（＝搬送速度）の修正量ΔＶの指令を出力し、コ
ンベヤ14A、14Bの搬送速度をV0からV0＋ΔＶに変化させ
る。ΔV = (V−V 0 ′) × α (8) The arithmetic unit 23 outputs a command of the correction amount ΔV of the coating speed (= conveying speed) to the drive motor 19 of the conveyors 14A and 14B, and the conveyors 14A and 14B. Is changed from V 0 to V 0 + ΔV.
以上の動作を繰り返すことにより、被塗装物13に塗装
される塗料の膜厚を目標膜厚に近い値とすることができ
る。By repeating the above operation, the film thickness of the paint applied to the work 13 can be set to a value close to the target film thickness.
尚、塗料の性状の変動や周囲の環境条件の変動はゆる
やかに生じるので、上記において、ゲインαは小さく
（＜１）とることが有効である。In addition, it is effective to set the gain α to a small value (<1) in the above description because the change in the properties of the paint and the change in the surrounding environmental conditions occur slowly.
以上のように、上記実施例によれば、フローコータ10
において、膜厚と粘度の測定データに基づいて、前面コ
ンベヤ14Aの後面コンベヤ14Bの搬送速度を調整すること
のみにより、被塗装物13に塗装される塗料の膜厚を目標
膜厚に設定できる。従って、簡素な設備により、煩雑な
作業を伴うことなく、被塗装物13に塗装される塗料の膜
厚を高精度に制御することができる。特に、粘度の日内
変動、又は季節変動に迅速に対応してコンベヤ14A、14B
の搬送速度を調整でき、膜厚のばらつきを大幅に低減で
きる。As described above, according to the above embodiment, the flow coater 10
In the above, the film thickness of the paint applied to the work 13 can be set to the target film thickness only by adjusting the transport speed of the rear conveyor 14B of the front conveyor 14A based on the measurement data of the film thickness and the viscosity. Therefore, the film thickness of the paint applied to the object 13 can be controlled with high accuracy by simple equipment without complicated work. In particular, conveyors 14A and 14B respond quickly to diurnal or seasonal variations in viscosity.
Can be adjusted, and variations in film thickness can be greatly reduced.
［発明の効果］ 以上のように本発明によれば、フローコータにおい
て、簡素に設備により、煩雑な作業を伴うことなく、被
塗装物に塗装される塗料の膜厚を高精度に制御すること
ができる。[Effects of the Invention] As described above, according to the present invention, in a flow coater, it is possible to control the film thickness of a paint applied to an object to be coated with high accuracy with simple equipment without complicated work. Can be.
第１図は本発明が適用されるフローコータの一例を示す
制御系統図、第２図は膜厚と粘度と塗装速度との関係を
示す線図、第３図は膜厚とノズル隙間と塗装速度との関
係を示す線図、第４図はフローコータを示す模式図であ
る。 10……フローコータ、 11……塗料供給ヘッダ、 11A……ノズル、 12……塗料カーテン、 13……被塗装物、 14A……前面コンベヤ、 14B……後面コンベヤ、 21……膜厚計、 22……粘度計、 23……演算装置。FIG. 1 is a control system diagram showing an example of a flow coater to which the present invention is applied, FIG. 2 is a diagram showing the relationship between film thickness, viscosity and coating speed, and FIG. FIG. 4 is a diagram showing the relationship with the speed, and FIG. 4 is a schematic diagram showing a flow coater. 10… Flow coater, 11… Paint supply header, 11A …… Nozzle, 12 …… Paint curtain, 13 …… Object to be coated, 14A …… Front conveyor, 14B …… Back conveyor, 21 …… Film thickness meter, 22 ... Viscometer, 23 ... Calculator.
Claims (1)
テンを流下せしめ、塗料カーテンが垂下する塗装領域の
前後に、被塗装物搬送用の前面コンベヤと後面コンベヤ
とを離隔配置して構成されるフローコータの塗装膜厚制
御方法において、塗装領域の出側に設けた膜厚計により
被塗装物に塗装された塗料の膜厚を測定するとともに、
塗料カーテンのための塗料の供給系に設けた粘度計によ
り塗料の粘度を測定し、膜厚と粘度の測定データに基づ
いて、被塗装物に塗装される塗料の膜厚が目標膜厚とな
るように、前面コンベヤと後面コンベヤの搬送速度を調
整することを特徴とするフローコータの塗装膜厚制御方
法。1. A flow in which a paint curtain is caused to flow down from a nozzle gap of a paint supply header, and a front conveyor and a rear conveyor for transporting an object to be coated are separated from each other before and after a coating area where the paint curtain hangs. In the coating thickness control method of the coater, while measuring the thickness of the coating applied to the object to be coated with a thickness gauge provided on the exit side of the coating area,
The viscosity of the paint is measured by a viscometer provided in the paint supply system for the paint curtain, and based on the measurement data of the film thickness and the viscosity, the film thickness of the paint applied to the workpiece becomes the target film thickness. A method for controlling a coating thickness of a flow coater, wherein the conveying speeds of a front conveyor and a rear conveyor are adjusted as described above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168311A JP2724631B2 (en) | 1990-06-28 | 1990-06-28 | Method for controlling coating thickness of flow coater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2168311A JP2724631B2 (en) | 1990-06-28 | 1990-06-28 | Method for controlling coating thickness of flow coater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0461963A JPH0461963A (en) | 1992-02-27 |
| JP2724631B2 true JP2724631B2 (en) | 1998-03-09 |
Family
ID=15865677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2168311A Expired - Lifetime JP2724631B2 (en) | 1990-06-28 | 1990-06-28 | Method for controlling coating thickness of flow coater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2724631B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4630481B2 (en) * | 2001-03-26 | 2011-02-09 | 株式会社リコー | Image reading device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2861151D1 (en) * | 1977-06-23 | 1981-12-24 | Ici Plc | Process and apparatus for coating a web |
| JPS6380876A (en) * | 1986-09-25 | 1988-04-11 | Nippon Steel Corp | Method for adjusting thickness of coating film in curtain flow painting |
-
1990
- 1990-06-28 JP JP2168311A patent/JP2724631B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0461963A (en) | 1992-02-27 |
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