JPH01212798A - Electrodeposition vessel - Google Patents
Electrodeposition vesselInfo
- Publication number
- JPH01212798A JPH01212798A JP3825388A JP3825388A JPH01212798A JP H01212798 A JPH01212798 A JP H01212798A JP 3825388 A JP3825388 A JP 3825388A JP 3825388 A JP3825388 A JP 3825388A JP H01212798 A JPH01212798 A JP H01212798A
- Authority
- JP
- Japan
- Prior art keywords
- tank
- electrodeposition
- vessel
- liquid
- soln
- 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.)
- Granted
Links
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 claims description 66
- 239000011248 coating agent Substances 0.000 abstract description 12
- 238000000576 coating method Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract 7
- 238000001556 precipitation Methods 0.000 abstract 2
- 239000010410 layer Substances 0.000 description 9
- 239000003973 paint Substances 0.000 description 9
- 238000010422 painting Methods 0.000 description 4
- 230000000630 rising effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 239000002659 electrodeposit Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は被塗物を貯留電着液に浸漬させて電着塗装を施
す電着槽に関し、詳しくは、貯留電着液を底層部と上層
部とで逆向きの水平流となるように槽内循環させるため
の液噴出器を、槽底部と槽上部とに互いに逆向きで槽長
手方向に向けて設け、貯留電着液の槽内循環により、塗
料の沈降防止、塗装に悪影響を及ぼす泡の排除、並びに
、塗装能率の向上等を図った電着槽に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electrodeposition tank in which an object to be coated is immersed in a stored electrodeposition liquid to perform electrodeposition coating, and more specifically, the present invention relates to an electrodeposition tank in which an object to be coated is immersed in a stored electrodeposition liquid to perform electrodeposition coating. Liquid ejectors are installed at the bottom and top of the tank, facing in the longitudinal direction of the tank in opposite directions, to circulate the liquid in the tank so that the horizontal flow is opposite to that of the upper layer. This invention relates to an electrodeposition tank that uses circulation to prevent paint from settling, eliminate bubbles that adversely affect painting, and improve painting efficiency.
従来、上述の如き電着槽においては、第７図に示すよう
に、液噴出器として、槽底部と槽上部とに、互いに同構
成のノズル（３ａ）、 （４ａ）を夫々上下−段づつ設
けていた。Conventionally, in the above-mentioned electrodeposition tank, nozzles (3a) and (4a) of the same configuration are installed in upper and lower stages as liquid ejectors at the bottom and top of the tank, respectively, as shown in FIG. It was set up.
尚、槽上部に設けるノズル（４ａ）は、被塗物浸漬の遠
雷とならないように槽（１）の左右側壁近くで槽長手方
向に並設されている。The nozzles (4a) provided at the top of the tank are arranged in parallel in the longitudinal direction of the tank near the left and right side walls of the tank (1) to prevent the objects to be coated from being immersed in lightning.
しかし、貯留電着液の槽内循環形態としては、第４図に
示すように、槽底部においては、貯留電着液１）が槽底
に沿って強く流れ、かつ、槽上部では貯留電着液（Ｌ）
がその中層部から上層部にかけての上下方向に広い範囲
にわたって均一な速度で槽底流とは逆向きに流れるのが
理想的であり、槽底に沿って流れる強い槽底流により塗
料の沈降が確実に防止され、又、中層部から上層部にか
けての均一速度の液流により浸漬被塗物（Ａ）の全体が
ムラの無い状態で均一に、かつ、能率良く電着処理され
る。However, as shown in Fig. 4, the stored electrodeposition liquid 1) flows strongly along the tank bottom, and the stored electrodeposition liquid 1) flows strongly along the tank bottom, and the stored electrodeposition liquid 1) flows strongly along the tank bottom, as shown in Figure 4. Liquid (L)
Ideally, the paint should flow in the opposite direction to the bottom flow of the tank at a uniform speed over a wide vertical range from the middle to the top, and the strong bottom flow that flows along the bottom of the tank ensures that the paint settles. Furthermore, due to the uniform velocity of the liquid flow from the middle layer to the upper layer, the entire immersion coated object (A) can be electrodeposited uniformly and efficiently without unevenness.
ところが、前述従来の電着槽における貯留電着液の槽内
循環形態は、第８図に示すように、槽上下方向中央部の
中層部に滞留層があり、そして、その滞留層を境にして
槽上部側はど、又、槽底部側はど互いに逆向きの流速が
ほぼ同等の大きな勾配で比例的に増大する形態となって
おり、理想の循環形態との比較において、浸漬被塗物（
Ａ）の全体をムラの無い状態で、かつ、−層能率良く電
着処理する上で、又、塗料の沈降をより確実に防止する
上で、貯留電着液の槽内循環形態を改善する余地があっ
た。However, in the above-mentioned conventional electrodeposition tank, the stored electrodeposition liquid circulates in the tank, as shown in FIG. The flow velocities in opposite directions at the top of the tank and at the bottom of the tank increase proportionally with almost the same large gradient. (
A) Improve the circulation form of the stored electrodeposition solution in the tank in order to electrodeposit the entire layer evenly and with good layer efficiency, and to more reliably prevent sedimentation of the paint. There was room.
本発明の目的は、上述考案結果に基づいた改良により、
貯留電着液の槽内循環形態を理想形態に近づけることに
ある。The purpose of the present invention is to achieve improvements based on the above-mentioned results.
The objective is to bring the circulation form of the stored electrodeposition liquid in the tank closer to the ideal form.
本発明による電着槽の特徴構成は、貯留電着液を底層部
と上層部とで逆向きの水平流となるように槽内循環させ
るための液噴出器を、槽底部と槽上部とに互いに逆向き
で槽長手方向に向けて設ける構成において、前記液噴出
器のうち槽上部に設ける上部側液噴出器の上下方向にお
ける有効噴出巾を、摺底部に設ける下部側液噴出器の上
下方向における有効噴出巾よりも大としてあることにあ
り、その作用・効果は次の通りである。The characteristic structure of the electrodeposition tank according to the present invention is that a liquid ejector is installed at the bottom and top of the tank to circulate the stored electrodeposition liquid in the tank so that the bottom layer and the top layer form horizontal flows in opposite directions. In a configuration in which the liquid ejectors are provided oppositely to each other in the longitudinal direction of the tank, the effective ejection width in the vertical direction of the upper liquid ejector provided at the top of the tank among the liquid ejectors is equal to the effective ejection width in the vertical direction of the lower side liquid ejector provided at the bottom of the slide. Its function and effect are as follows.
つまり、（第１図参照）上部側液噴出器（４）の上下方
向における有効噴出巾（ｄＨ）を下部側液噴出器（３）
の上下方向における有効噴出巾（ｄｔ、）よりも大とす
ると、貯留電着液（Ｌ）の槽内循環形態は、液噴出器と
して互いに同構成のノズルを槽底部と槽上部とに夫々−
段づつ設けていた従来電着槽における循環形態（第７図
及び第８図参照）に較べ、第３図に示すように、滞留層
が槽底部側に寄り、そして、その滞留層よりも上部の中
層部から上層部にかけての流速が均一化される傾向とな
ると共に、槽底部では、槽上部側と逆向きに流れる液流
の上下中が制限された状態、すなわち、上下方向により
密な状態で電着液が槽底に沿って流れるようになり、全
体として、第４図に示す理想の形態に近づくようになる
。In other words, (see Fig. 1) the effective ejection width (dH) in the vertical direction of the upper liquid ejector (4) is the same as that of the lower liquid ejector (3).
is larger than the effective ejection width (dt) in the vertical direction, the circulation form of the stored electrodeposited liquid (L) in the tank is such that nozzles of the same configuration are installed as liquid ejectors at the bottom of the tank and at the top of the tank, respectively.
Compared to the circulation form in conventional electrodeposition tanks, which are provided in stages (see Figures 7 and 8), as shown in Figure 3, the retention layer is closer to the bottom of the tank, and the upper part of the retention layer is closer to the bottom of the tank. The flow velocity tends to be uniform from the middle part to the upper part, and at the bottom of the tank, the liquid flow flowing in the opposite direction to the top of the tank is restricted in the upper and lower directions, that is, it is more dense in the vertical direction. The electrodepositing solution now flows along the bottom of the tank, and the overall shape approaches the ideal shape shown in FIG. 4.
その結果、従来の電着槽に比して、均一塗装性、塗装能
率、並びに、塗料の沈降防止の面で一層優れた電着槽と
することができ、均−塗装性及び塗料の沈降防止に優れ
ていることから電着塗装品質を向上でき、全体として、
高品質の電着塗装を能率良〈実施し得るようになった。As a result, compared to conventional electrodeposition tanks, it is possible to create an electrodeposition tank that is even better in terms of uniform coating performance, coating efficiency, and prevention of paint settling. As a result, the quality of electrodeposition coating can be improved, and as a whole,
High-quality electrodeposition coating can now be carried out efficiently.
次に実施例を説明する。 Next, an example will be described.
第１図及び第２図は被塗物（Ａ）を貯留電着液（Ｌ）に
浸漬させて電着塗装を施す電着槽（１）を示し、被塗物
（Ａ）はハンガーコンベア（２）による搬送に伴い、槽
（１）の一端側で貯留電着液（Ｌ）に浸漬されて電着液
（Ｌ）中を進行し、そして、槽（１）の他端側で貯留電
着液（Ｌ）から引き上げられて次工程に送られる。Figures 1 and 2 show an electrodeposition tank (1) in which the object to be coated (A) is immersed in the stored electrodeposition liquid (L) to perform electrodeposition coating, and the object to be coated (A) is carried on a hanger conveyor ( 2), one end of the tank (1) is immersed in the stored electrodeposition liquid (L) and moves through the electrodeposition liquid (L), and then the stored electrodeposition liquid (L) is immersed in the stored electrodeposition liquid (L) at the other end of the tank (1). It is pulled up from the landing liquid (L) and sent to the next process.
槽（１）の底部には、被塗物（Ａ）の搬送方向とは逆向
きで多少斜め下向きに向けた複数のエゼクタ−ノズル（
３ａ）を槽中方向に所定間隔で並設して構成した下部側
液噴出器（３）を槽長手方向に並設しである。At the bottom of the tank (1), there are a plurality of ejector nozzles (oriented slightly diagonally downward and opposite to the conveying direction of the object to be coated (A)).
The lower liquid ejectors (3) are arranged in parallel in the longitudinal direction of the tank.
又、槽（１）の上部には、被塗物搬送方向と同じ向きで
若干槽（１）の左右中央寄りに傾けた向きのエゼクタ−
ノズル（４ａ）を上下２段に並設して構成した上部側液
噴出器（４）を、被塗物進行の障害とならないように槽
左右側壁（ｌａ）、 （ｌｂ）夫々の近くで槽長手方向
に並設しである。Furthermore, at the top of the tank (1), there is an ejector that is oriented in the same direction as the conveyance direction of the object to be coated and slightly tilted towards the left and right center of the tank (1).
The upper liquid ejector (4), which is composed of nozzles (4a) arranged in two rows above and below, is installed near the left and right side walls (la) and (lb) of the tank, respectively, so as not to obstruct the progress of the object to be coated. They are arranged in parallel in the longitudinal direction.
つまり、上述の如く互いに逆向きで槽（１）の長平方向
に向けた下部側液噴出器（３）と上部側液噴出器（４）
とからの電着液噴出により、貯留電着液（Ｌ）を、槽底
部では被塗物搬送方向と逆向きに流動させ、かつ、槽上
部では被塗物搬送方向と同じ向きに流動させる状態に槽
内循環させるようにしてあり、それによって、塗料の沈
降防止、塗装に悪影響を与える泡の排除、並びに、塗装
能率の向上を図っである。In other words, as mentioned above, the lower liquid ejector (3) and the upper liquid ejector (4) are opposite to each other and are directed toward the longitudinal direction of the tank (1).
A state in which the stored electrodeposition liquid (L) is caused to flow in the opposite direction to the direction of conveyance of the object to be coated at the bottom of the tank and in the same direction as the direction of conveyance of the object to be coated at the top of the tank by ejection of the electrodeposition liquid from the tank. The paint is circulated within the tank, thereby preventing the paint from settling, eliminating bubbles that adversely affect painting, and improving painting efficiency.
又、下部側液噴出器（３）を上下−段で槽中方向に並設
したエゼクタ−ノズル（３ａ）で構成するのに対して、
上部側液噴出器（４）を上下２段に並設したエゼクタ−
ノズル（４ａ）で構成することにより、上部側液噴出器
（４）の上下方向における有効噴出巾（ｄＨ）を、下部
側液噴出器（３）の上下方向における有効噴出巾（ｄＬ
）よりも大とし、それによって、貯留電着液（Ｌ）の槽
内循環形態を第３図に示すように理想の循環形態（第４
図に示す）に近いものとして、均一塗装性、及び、塗装
能率の一層の向上を図ると共に、塗料の沈降をより確実
に防止し得るようにしである。In addition, whereas the lower liquid ejector (3) is composed of ejector nozzles (3a) arranged in upper and lower stages in parallel in the tank direction,
Ejector with two upper and lower liquid ejectors (4) arranged in parallel.
By configuring the nozzle (4a), the effective ejection width (dH) in the vertical direction of the upper liquid ejector (4) is equal to the effective ejection width (dL) in the vertical direction of the lower liquid ejector (3).
), thereby changing the circulation form of the stored electrodeposited liquid (L) in the tank to the ideal circulation form (4th) as shown in Figure 3.
As shown in the figure), it is designed to further improve uniform coating performance and coating efficiency, and to more reliably prevent sedimentation of the paint.
図中（５）及び（６）は、各液噴出器（３）、 （４）
におけるエゼクタ−ノズル（３ａ）、 （４ａ）に電着
液を循環供給する循環路であり、（７）は循環ポンプ、
（８）はフィルターである。(5) and (6) in the figure represent each liquid ejector (3), (4)
(7) is a circulation pump,
(8) is a filter.
槽（１）の長手方向両端部における槽底は槽端側はど高
くなる傾斜底（ｌｃ）、 （ｌｄ） としてあり、こ
れによって、貯留電着液（Ｌ）の槽内循環を円滑にする
と共に、コーナ一部を無くしてコーナ一部での塗料の沈
降堆積が無いようにしである。The tank bottoms at both longitudinal ends of the tank (1) are sloped bottoms (lc) and (ld) that are higher at the end of the tank, thereby smoothing the circulation of the stored electrodeposition liquid (L) in the tank. At the same time, some corners are eliminated to prevent paint from settling and accumulating at some corners.
又、被塗物（Ａ）を貯留電着液（Ｌ）に浸漬する側の槽
端部における槽壁（１ｅ）の内面側、すなわち、槽内循
環において貯留電着液（Ｌ）が上昇過程から槽上部流に
変向する経路に面する槽一端側壁（１ｅ）の内面側には
、側面視断面形状が槽内側に凹となる円弧状の湾曲ガイ
ド板（９）を設けてあり、この湾曲ガイド板（９）の内
側ガイド面（ａ）により、上昇過程から槽上部流に変更
する循環電着液（シ）の流動を案内して、槽上部流への
変向をスムースにすることで、槽端部において電着液（
Ｌ）が沸き上がる状態で液面が持ち上がることを防止し
、そのような沸き上がる状態の液面の持ち上がりに起因
した泡の多量発生を防止するようにしである。Also, the inner surface of the tank wall (1e) at the end of the tank where the object to be coated (A) is immersed in the stored electrodeposition liquid (L), that is, the stored electrodeposition liquid (L) is in the rising process during circulation in the tank. On the inner surface of the side wall (1e) at one end of the tank facing the path that changes from the flow to the upper part of the tank, there is provided a curved guide plate (9) having an arc-shaped cross-sectional shape in side view that is concave toward the inside of the tank. The inner guide surface (a) of the curved guide plate (9) guides the flow of the circulating electrodeposition liquid (shi) changing from the rising process to the upper flow of the tank, thereby making the change of direction to the upper flow of the tank smooth. Then, at the end of the tank, the electrodeposition solution (
This is to prevent the liquid level from rising when L) is boiling, and to prevent a large amount of foam from being generated due to the rising liquid level when the liquid is boiling.
次に別実施例を列記する。 く（イ
） 第５図に示すように、上部側液噴出器（４）を構
成するノズル（４ａ）を２段以上の多段にして貯留電着
液（Ｌ）の表層部から槽底近くにかけて並設するように
しても良い。Next, another example will be listed. (a) As shown in Fig. 5, the nozzle (4a) constituting the upper liquid ejector (4) is arranged in two or more stages from the surface layer of the stored electrodeposition liquid (L) to near the bottom of the tank. They may be arranged in parallel.
（ロ） 第６図に示すように、上下方向における有効噴
出巾（ｄ＋（）が下部側液噴出器（３）の有効噴出巾（
ｄＬ）よりも大きな上部側液噴出器（４）として、上下
方向に延びるスリット状噴出口を有するノズル（４ａ’
）を槽上部に配置しても良い。(b) As shown in Fig. 6, the effective jet width (d+()) in the vertical direction is the effective jet width (
The nozzle (4a'
) may be placed at the top of the tank.
（ハ） 上部側液噴出器及び下部側液噴出器夫々の具体
的構造は種々の改良が可能であり、又、上部側液噴出器
の上下方向における有効噴出巾を、下部側液噴出器の上
下方向における有効噴出巾よりもどの程度大きなものと
するかも適宜決定すれば良い。(c) The specific structures of the upper liquid ejector and the lower liquid ejector can be improved in various ways, and the effective ejection width in the vertical direction of the upper liquid ejector can be changed by changing the effective ejection width of the upper liquid ejector in the vertical direction. How much larger it should be than the effective ejection width in the vertical direction may be determined as appropriate.
尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すが、該記入により本発明は添付図面の構造
に限定されるものではない。Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings.
第１図ないし第３図は本発明の実施例を示し、第１図は
全体側面図、第２図は平面図、第３図は電着液の槽内循
環形態を示す図である。第４図は理想的な電着液循環形
態を示す図である。
第５図及び第６図は夫々本発明の別実施例を示す部分断
面図である。第７図及び第８図は従来例を示し、第７図
は部分断面図、第８図は電着液循環形態を示す図である
。
（３）、 （４）・・・・・・液噴出器、（４ａ） 、
（４ａ’ ）・・・・・・ノズル、（Ｌ）・・・・・
・貯留電着液、（ｄＨ）、（ｄＬ）・・・・・・有効噴
出巾。1 to 3 show an embodiment of the present invention, in which FIG. 1 is an overall side view, FIG. 2 is a plan view, and FIG. 3 is a diagram showing the circulation form of the electrodeposition liquid in the tank. FIG. 4 is a diagram showing an ideal electrodeposition liquid circulation form. FIGS. 5 and 6 are partial cross-sectional views showing other embodiments of the present invention, respectively. FIGS. 7 and 8 show a conventional example, with FIG. 7 being a partial sectional view and FIG. 8 being a diagram showing an electrodeposition liquid circulation form. (3), (4)...liquid ejector, (4a),
(4a')... Nozzle, (L)...
-Reserved electrodeposited liquid, (dH), (dL)...Effective ejection width.
Claims (1)
平流となるように槽内循環させるための液噴出器（３）
、（４）を、槽底部と槽上部とに互いに逆向きで槽長手
方向に向けて設けた電着槽であって、前記液噴出器（３
）、（４）のうち槽上部に設ける上部側液噴出器（４）
の上下方向における有効噴出巾（ｄ＿Ｈ）を、槽底部に
設ける下部側液噴出器（３）の上下方向における有効噴
出巾（ｄ＿Ｌ）よりも大としてある電着槽。 ２、前記上部側液噴出器（４）が、上下方向に並設され
た複数ノズル（４ａ）を備える請求項１記載の電着槽。 ３、前記上部側液噴出器（４）が、上下方向に延びるス
リット状噴出口を有するノズル（４ａ’）から成る請求
項１記載の電着槽。[Claims] 1. A liquid ejector (3) for circulating the stored electrodeposition liquid (L) in the tank so that the bottom layer and the top layer form horizontal flows in opposite directions.
, (4) are provided at the bottom and top of the tank in opposite directions to each other in the longitudinal direction of the tank, the liquid ejector (3)
), (4), upper side liquid ejector (4) installed at the top of the tank
An electrodeposition tank in which the effective ejection width (d_H) in the vertical direction is larger than the effective ejection width (d_L) in the vertical direction of the lower liquid ejector (3) provided at the bottom of the tank. 2. The electrodeposition tank according to claim 1, wherein the upper liquid ejector (4) includes a plurality of nozzles (4a) arranged in parallel in the vertical direction. 3. The electrodeposition tank according to claim 1, wherein the upper liquid ejector (4) comprises a nozzle (4a') having a slit-shaped ejection port extending in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038253A JP2579661B2 (en) | 1988-02-19 | 1988-02-19 | Electrodeposition tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63038253A JP2579661B2 (en) | 1988-02-19 | 1988-02-19 | Electrodeposition tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01212798A true JPH01212798A (en) | 1989-08-25 |
| JP2579661B2 JP2579661B2 (en) | 1997-02-05 |
Family
ID=12520147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63038253A Expired - Fee Related JP2579661B2 (en) | 1988-02-19 | 1988-02-19 | Electrodeposition tank |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2579661B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251266U (en) * | 1988-09-30 | 1990-04-10 | ||
| JP2009173970A (en) * | 2008-01-22 | 2009-08-06 | Industria:Kk | Treating tank |
| US20100206343A1 (en) * | 2009-02-13 | 2010-08-19 | Honda Motor Co., Ltd. | Nozzle and foreign matter removing device |
-
1988
- 1988-02-19 JP JP63038253A patent/JP2579661B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0251266U (en) * | 1988-09-30 | 1990-04-10 | ||
| JPH057244Y2 (en) * | 1988-09-30 | 1993-02-24 | ||
| JP2009173970A (en) * | 2008-01-22 | 2009-08-06 | Industria:Kk | Treating tank |
| US20100206343A1 (en) * | 2009-02-13 | 2010-08-19 | Honda Motor Co., Ltd. | Nozzle and foreign matter removing device |
| US9114417B2 (en) * | 2009-02-13 | 2015-08-25 | Honda Motor Co., Ltd. | Nozzle and foreign matter removing device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2579661B2 (en) | 1997-02-05 |
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