JP2003190866A - Apparatus for supplying heating air to preheat zone - Google Patents
Apparatus for supplying heating air to preheat zoneInfo
- Publication number
- JP2003190866A JP2003190866A JP2001393148A JP2001393148A JP2003190866A JP 2003190866 A JP2003190866 A JP 2003190866A JP 2001393148 A JP2001393148 A JP 2001393148A JP 2001393148 A JP2001393148 A JP 2001393148A JP 2003190866 A JP2003190866 A JP 2003190866A
- Authority
- JP
- Japan
- Prior art keywords
- air
- based paint
- water
- coated
- zone
- 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.)
- Pending
Links
Landscapes
- Drying Of Solid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、前段の塗装ゾーン
と後段の塗装ゾーンとの間に形成されたプレヒートゾー
ンの加熱エア吹付エリアに、前段の塗装ゾーンで塗装さ
れた被塗物の塗膜中に含まれる水分を適度に乾燥させる
ための加熱エアを供給するプレヒートゾーンの加熱エア
供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating film of an object to be coated which has been applied in a pre-coating zone in a heated air spraying area of a pre-heat zone formed between a pre-painting zone and a post-painting zone. The present invention relates to a heated air supply device for a preheat zone that supplies heated air for appropriately drying water contained therein.
【０００２】[0002]
【従来の技術】最近は、有機溶剤の排出規制が厳しくな
るにつれ、広い用途分野にわたって水性塗料の使用が増
加しつつある。特に、自動車塗装の分野においては、有
機溶剤の排出規制をクリアするために、これまでの有機
溶剤系塗料による塗装から水性塗料を使用した塗装への
転換が図られつつある。2. Description of the Related Art Recently, the use of water-based paints has been increasing over a wide range of fields as the emission regulations of organic solvents have become stricter. In particular, in the field of automobile coating, in order to meet the emission regulations of organic solvents, the conventional coating using organic solvent-based paints is being changed to coating using water-based paints.
【０００３】例えば、自動車ボディの水性塗料の上塗り
塗装を行う場合、自動車塗装ラインは、コンベアで搬送
される自動車ボディの表面に水性メタリック塗料によっ
て美観付与のためのベースコートを施した後、、そのベ
ースコートの上に透明塗料によって外的要因からの保護
機能を有するクリアコートを施すこととしている。[0003] For example, in the case of applying a top coat coating of a water-based paint for an automobile body, an automobile coating line applies a base coat for imparting an aesthetic appearance to the surface of the automobile body conveyed by a conveyor with a water-based metallic paint, and then the base coat. A clear coat with a protective function against external factors is applied on top of it by means of transparent paint.
【０００４】この場合に、ベースコートの塗膜中の水分
が適度に蒸発されないまま、その塗膜の上にクリアコー
ト用塗料が重ね塗りされると、ベースコートの塗膜が平
滑化されず、また、焼付け乾燥の際にその水分が急激に
蒸発して、たれ、たるみ、わき等の塗装欠陥を生ずるお
それがある。In this case, if the clear coat paint is applied over the coating film without water vapor in the coating film being appropriately evaporated, the coating film of the base coat is not smoothed, and During baking and drying, the water content may rapidly evaporate, resulting in coating defects such as sagging, sagging, and armpits.
【０００５】このため、ベースコート用塗料として水性
塗料を用いる塗装ラインでは、ベースコートを施す前段
の塗装ゾーンと、クリアコートを施す後段の塗装ゾーン
との間に、所定温度の加熱エアを吹き付けて塗膜中の水
分を蒸発させるプレヒートゾーンを設けるのが一般的で
ある。For this reason, in a coating line using a water-based paint as the base coat paint, heated air of a predetermined temperature is blown between the coating zone of the former stage where the base coat is applied and the coating zone of the latter stage where the clear coat is applied to form the coating film. It is common to provide a preheat zone for evaporating the water content therein.
【０００６】一方、自動車ボディの塗装ラインでは、数
十色もの塗料を同一の塗装機で色替塗装するようにして
いるが、全色の塗料が水性化されるまでの間は、省スペ
ース、省設備費、生産効率の向上の観点からも、既存の
有機溶剤系塗料の塗装ラインを、水性塗料でも有機溶剤
系塗料でも塗装することができる混合生産ラインに改造
する要望が非常に高い。On the other hand, in the coating line for automobile bodies, dozens of colors of paint are color-changed and painted by the same painting machine. However, until the paint of all colors is made water-based, space saving, From the viewpoint of facility cost and improvement of production efficiency, there is a great demand to convert the existing organic solvent paint coating line into a mixed production line that can coat both water-based paint and organic solvent paint.
【０００７】この場合、水性塗料及び有機溶剤系塗料の
夫々を適正に乾燥させるために、水性塗料が塗装された
自動車ボディを乾燥させるときは、約８０℃の加熱エア
を吹き付けて、水性塗料を適正乾燥温度６０℃（許容誤
差±１０％程度）で６０秒以上保持させるという乾燥条
件を満たすように塗膜温度を昇温させ、有機溶剤系塗料
が塗装された自動車ボディを乾燥させるときは加熱エア
の供給量を減少させ又は停止させて塗膜温度を有機溶剤
系塗料の上限管理温度５０℃程度（許容誤差＋１０％程
度）に抑えるようにしている。In this case, in order to properly dry each of the water-based paint and the organic solvent-based paint, when the automobile body coated with the water-based paint is dried, heated air of about 80 ° C. is blown to spray the water-based paint. Heating to raise the temperature of the coating film so as to satisfy the drying condition of keeping it for 60 seconds or more at an appropriate drying temperature of 60 ° C (tolerance of about ± 10%) and drying the car body coated with the organic solvent-based paint. The supply amount of air is reduced or stopped to keep the coating film temperature at the upper limit control temperature of the organic solvent-based paint of about 50 ° C. (permissible error of about + 10%).
【０００８】このように水性塗料は有機溶剤系塗料より
乾燥しにくいので、有機溶剤系塗料が塗装された先行の
自動車ボディに続いて、水性塗料が塗装された後続の自
動車ボディがプレヒートゾーンへ搬入されたときには、
水性塗料の搬入と同時に、先行する有機溶剤系塗料が乾
燥過多とならないように、且つ、水性塗料の乾燥条件で
運転しなければ乾燥不十分となってしまう。そして、逆
の場合は、水性塗料を適正に乾燥した後、即座に、有機
溶剤系塗料の乾燥条件で運転しなければ乾燥過多とな
る。[0008] As described above, since the water-based paint is harder to dry than the organic solvent-based paint, the preceding car body coated with the organic solvent-based paint and the subsequent car body coated with the water-based paint are carried into the preheat zone. When
At the same time when the water-based paint is carried in, the preceding organic solvent-based paint will not be over-dried, and if it is not operated under the drying conditions of the water-based paint, the drying will be insufficient. In the opposite case, if the water-based paint is properly dried and then the organic solvent-based paint is not operated under the drying condition immediately, it will be over-dried.
【０００９】図５はこのような塗装ラインの要部を示
し、コンベアＣで搬送される自動車ボディ２Ｐ、２Ｗご
とに有機溶剤系塗料又は水性塗料を選択的に塗装する前
段の塗装ゾーン２１と、その塗膜に別異の塗料を重ね塗
りする後段の塗装ゾーン２２の間に全長１５ｍのプレヒ
ートゾーン２３が形成され、入口側１０ｍに加熱エア吹
付エリア２４が形成されると共に、出口側５ｍに冷却エ
ア吹付エリア２５が形成されている。そして、加熱エア
吹付エリア２４は、入口側の第一区分エリア２４Ａと出
口側の第二区分エリア２４Ｂに分けられ、各区分エリア
２４Ａ及び２４Ｂの夫々に加熱エアを供給する加熱エア
供給装置２６が配されている。FIG. 5 shows a main part of such a coating line. A front-stage coating zone 21 for selectively coating an organic solvent-based paint or a water-based paint for each automobile body 2P, 2W conveyed by a conveyor C, A preheat zone 23 having a total length of 15 m is formed between subsequent coating zones 22 in which different coating materials are applied over the coating film, a heated air blowing area 24 is formed at the inlet side 10 m, and cooling is performed at the outlet side 5 m. An air spray area 25 is formed. The heated air blowing area 24 is divided into an inlet-side first divided area 24A and an outlet-side second divided area 24B, and a heated air supply device 26 that supplies heated air to each of the divided areas 24A and 24B. It is distributed.
【００１０】この加熱エア供給装置２６は、送風機２７
から送給されてヒータ２８で加熱された約８０℃の加熱
エアを各エリア２４Ａ及び２４Ｂに供給する加熱エア供
給ダクト２９と、各エリア２４Ａ及び２４Ｂから加熱空
気を還流する還流ダクト３０と、加熱エア供給ダクト２
９から各エリア２４Ａ及び２４Ｂをショートカットして
還流ダクト３０へ連通するショートカットダクト３１
と、これら核流路を切り換えるダンパ３２…を備えた加
熱エア供給系３３が形成されている。The heating air supply device 26 is provided with a blower 27.
A heating air supply duct 29 for supplying heated air of about 80 ° C. fed from the heater 28 to each area 24A and 24B, and a recirculation duct 30 for returning heated air from each area 24A and 24B, and heating. Air supply duct 2
Shortcut duct 31 that short-circuits each area 24A and 24B from 9 and communicates with the return duct 30
And a heated air supply system 33 including a damper 32 for switching these nuclear flow paths is formed.
【００１１】なお、第一区分エリア２４Ａ及び第二区分
エリア２４Ｂの必要風量は高々４００ｍ３／ｍｉｎ程度
であるので、送風機２７は最大送風量７００ｍ３／ｍｉ
ｎ程度のものが１台ずつあれば十分であり、夫々の送風
機２７を必要送風量４００ｍ３／ｍｉｎで運転するよう
にしている。Since the required air volume in the first section area 24A and the second section area 24B is at most about 400 m 3 / min, the blower 27 has a maximum air flow rate of 700 m 3 / mi.
It is sufficient to have one fan for each of the n blowers, and each blower 27 is operated at a required blower flow rate of 400 m 3 / min.
【００１２】これによれば、各送風機２７を必要風量で
稼動させておき、流路切換ダンパ３０により各区分エリ
ア２４Ａ及び２４Ｂに加熱エアを供給する流路と、各区
分エリア２４Ａ及び２４Ｂに加熱エアを供給することな
くヒータ２８へ還流させる流路と切り換えるだけで、各
区分エリア２４Ａ及び２４Ｂへの加熱エアの供給を瞬時
にオンオフすることができ、水性塗料と有機溶剤系塗料
を塗装した自動車ボディが前後して搬送されてきても、
いずれの塗膜も適正に乾燥することができる。According to this, each blower 27 is operated with a required air volume, and the flow passage switching damper 30 heats the flow passages for supplying heated air to the respective division areas 24A and 24B and the respective division areas 24A and 24B. The supply of heated air to each of the divided areas 24A and 24B can be instantly turned on and off simply by switching to a flow path for returning to the heater 28 without supplying air, and an automobile coated with a water-based paint and an organic solvent-based paint Even if the body is transported back and forth,
Both coatings can be dried properly.
【００１３】例えば、この加熱エア供給装置２６を使用
してプレヒートゾーン２３の加熱エア吹付エリア２４に
加熱エアを供給し、全長４.５ｍの自動車ボディ２Ｐ、
２Ｗを搬送速度４.２ｍ／ｍｉｎ、搬送ピッチ７.５ｍ
（搬送間隔３.０ｍ）で搬送したとき、加熱エア吹付エ
リア２４の通過時間は１４３秒であり、上記加熱エア供
給装置２６で８０〜１００℃の加熱エアを所定のタイミ
ングで供給したときの水性塗料及び有機溶剤系塗料の塗
膜温度は図３に示すように推移する。For example, the heated air supply device 26 is used to supply heated air to the heated air blowing area 24 of the preheat zone 23, and the automobile body 2P having a total length of 4.5 m,
2 W, transport speed 4.2 m / min, transport pitch 7.5 m
When conveyed at (conveyance interval of 3.0 m), the passage time of the heated air blowing area 24 is 143 seconds, and the water content when the heated air of 80 to 100 ° C. is supplied by the heated air supply device 26 at a predetermined timing. The coating film temperatures of the paint and the organic solvent-based paint change as shown in FIG.
【００１４】図３（ａ）は、有機溶剤系塗料が塗装され
た先行の自動車ボディ２Ｐに続いて水性塗料が塗装され
た後続の自動車ボディ２Ｗが搬入されたときの自動車ボ
ディ２Ｐ及び２Ｗの位置と時間と塗膜温度の関係を示
す。FIG. 3 (a) shows the positions of the automobile bodies 2P and 2W when the preceding automobile body 2P coated with the organic solvent-based paint and the succeeding automobile body 2W coated with the water-based paint are carried in. And the relationship between time and coating temperature.
【００１５】本例では、水性塗料が塗装された自動車ボ
ディ２Ｗのフロント部が第一区分エリア２４Ａに搬入さ
れると同時（Ｔ１）に当該エリア２４Ａに加熱エアを供
給開始し、次いで、第二区分エリア２４Ｂに搬入される
と同時（Ｔ３）に当該エリア２４Ｂに加熱エアを供給開
始するように夫々の加熱エア供給装置２６、２６を運転
する。In this example, when the front part of the automobile body 2W coated with the water-based paint is carried into the first section area 24A (T 1 ), heating air is started to be supplied to the area 24A, and then the first section area 24A is started. At the same time (T 3 ) when loaded into the two-divided area 24B, the respective heated air supply devices 26, 26 are operated so as to start supplying heated air to the area 24B.
【００１６】このとき、自動車ボディ２Ｗに塗装された
水性塗料の塗膜温度ＷＴは約７８秒かかって水性塗料の
適正乾燥温度６０℃に達し、その後、第二区分エリア２
４Ｂから搬出される（Ｔ５）まで、６５秒程度６０℃以
上に維持されるので、水性塗料の乾燥条件を満たす。At this time, the coating film temperature WT of the water-based paint applied to the automobile body 2W takes about 78 seconds to reach the proper drying temperature 60 ° C. of the water-based paint, and then the second division area 2
Since it is maintained at 60 ° C. or higher for about 65 seconds until it is discharged from 4B (T 5 ), it satisfies the drying condition of the water-based paint.
【００１７】また、その３ｍ前方には有機溶剤系塗料を
塗装した自動車ボディ２Ｐのリア部があり、第一区分エ
リア２４Ａに加熱エアが供給開始されてから当該エリア
２４Ａを搬出されるまでの間（Ｔ１〜Ｔ２）の約３０秒
間加熱されたあと、第二区分エリア２４Ｂに加熱エアが
供給開始されるまでの４０秒間（Ｔ２〜Ｔ ３）放熱さ
れ、さらに、第二区分エリア２４Ｂに加熱エアが供給開
始されてから当該エリア２４Ｂを搬出されるまでの間
（Ｔ３〜Ｔ４）の約３０秒間加熱されることになる。Further, an organic solvent-based paint is placed 3 m ahead of it.
There is a rear part of the painted car body 2P.
Area where the heated air has been supplied to the rear 24A
Until 24A is delivered (T1~ TTwo) About 30 seconds
After being heated for a while, the heated air will reach the second section area 24B.
40 seconds (TTwo~ T Three) Heat dissipation
In addition, heated air is supplied to the second section area 24B.
From the start until the area 24B is carried out
(TThree~ TFour) Will be heated for about 30 seconds.
【００１８】このとき、自動車ボディ２Ｐに塗装された
有機溶剤系塗料の塗膜温度ＰＴは、昇温・降温を繰返
し、最終的に５０℃近傍に達するが、その直後に冷却エ
ア吹付ゾーン２５に搬入されるので、それ以上は温度が
上がらず、有機溶剤系塗料の乾燥条件を満たす。At this time, the coating temperature PT of the organic solvent-based paint applied to the automobile body 2P is repeatedly raised and lowered to finally reach about 50 ° C., but immediately after that, the cooling air blowing zone 25 is immediately cooled. Since it is carried in, the temperature does not rise any further and the drying conditions for organic solvent-based paints are satisfied.
【００１９】図３（ｂ）は、水性塗料が塗装された先行
の自動車ボディ２Ｗに続いて有機溶剤系塗料が塗装され
た後続の自動車ボディ２Ｐが搬入されたときの自動車ボ
ディ２Ｗ及び２Ｐの位置と時間と塗膜温度の関係を示
す。FIG. 3 (b) shows the positions of the automobile bodies 2W and 2P when the succeeding automobile body 2P coated with the organic solvent-based paint is loaded after the preceding automobile body 2W coated with the water-based paint. And the relationship between time and coating temperature.
【００２０】本例では、水性塗料が塗装された先行する
自動車ボディ２Ｗが第一区分エリア２４Ａ内を搬送され
ている間（Ｔ１１〜Ｔ１３）は当該エリア２４Ａに加熱
エアを供給しておき、そのリア部が搬出されると同時
（Ｔ１３）に当該エリア２４Ａへの加熱エアの供給を停
止し、次いで、自動車ボディ２Ｗが第二区分エリア２４
Ｂ内を搬送されている間（Ｔ１３〜Ｔ１５）は当該エリ
ア２４Ｂに加熱エアを供給しておき、そのリア部が搬出
されると同時（Ｔ１５）に当該エリア２４Ｂへの加熱エ
アの供給を停止するように、夫々の加熱エア供給装置２
６、２６を運転する。[0020] In this example, while the automobile body 2W preceding the aqueous coating is coated is being conveyed in the first section area 24A (T 11 ~T 13) is previously supplied to the heated air to the area 24A At the same time when the rear part is carried out (T 13 ), the supply of heated air to the area 24A is stopped, and then the automobile body 2W is moved to the second division area 24.
While being conveyed in the B (T 13 ~T 15) is previously supplied to the heated air in the area 24B, the heating air to the area 24B simultaneously (T 15) when the rear portion is carried out Each heating air supply device 2 so as to stop the supply.
Drive 6 and 26.
【００２１】このとき、自動車ボディ２Ｗに塗装された
水性塗料の塗膜温度ＷＴは各区分エリア２４Ａ及び２４
Ｂで加熱され、約７８秒かかって水性塗料の適正乾燥温
度６０℃に達し、その後６５秒程度６０℃以上に維持さ
れるので、水性塗料の乾燥条件を満たす。At this time, the coating film temperature WT of the water-based paint applied to the automobile body 2W is determined by the respective divided areas 24A and 24A.
It is heated at B, takes about 78 seconds to reach an appropriate drying temperature of 60 ° C. for the water-based paint, and is maintained at 60 ° C. or higher for about 65 seconds, which satisfies the drying condition of the water-based paint.
【００２２】また、その３ｍ後方には有機溶剤系塗料を
塗装した自動車ボディ２Ｐのフロント部があり、第一区
分エリア２４Ａに搬入されてから加熱エアの供給が停止
されるまでの間の約３０秒間（Ｔ１２〜Ｔ１３）加熱さ
れたあと、第二区分エリア２４Ｂに搬入されるまでの４
０秒間（Ｔ１３〜Ｔ１４）は放熱され、さらに、第二区
分エリア２４Ｂに搬入されてから当該エリア２４Ｂを搬
出されるまでの間（Ｔ１４〜Ｔ１５）の約３０秒間加熱
される。Further, there is a front part of the automobile body 2P coated with an organic solvent type paint 3m behind it, and it is about 30 from the time when it is carried into the first division area 24A until the supply of the heated air is stopped. 4 after being heated for 2 seconds (T 12 to T 13 ) and then carried into the second section area 24B
The heat is dissipated for 0 seconds (T 13 to T 14 ), and is further heated for about 30 seconds between the time when the second section area 24B is carried in and the time when the area 24B is carried out (T 14 to T 15 ).
【００２３】このとき、自動車ボディ２Ｐに塗装された
有機溶剤系塗料の塗膜温度ＰＴは、昇温・降温を繰返
し、最終的に５０℃に達するが、それ以後は加熱空気が
吹き付けられないので、予熱で加熱されたとしてもせい
ぜい許容誤差範囲の５５℃程度であり、したがって、有
機溶剤系塗料の乾燥条件を満たす。At this time, the coating film temperature PT of the organic solvent-based paint applied to the automobile body 2P repeatedly rises and falls and finally reaches 50 ° C., but since heated air cannot be blown thereafter, Even if it is heated by preheating, it is about 55 ° C. which is the allowable error range at most, and therefore, the drying condition of the organic solvent-based paint is satisfied.
【００２４】このように、ダンパ３２により加熱エアの
オンオフを瞬時に切り換えることができれば、有機溶剤
系塗料を塗装した自動車ボディ２Ｐと、水性塗料を塗装
した自動車ボディ２Ｗが、相前後して搬送されてきて
も、いずれも適正に乾燥することができる。As described above, if the heating air can be instantly switched on and off by the damper 32, the automobile body 2P coated with the organic solvent-based paint and the automobile body 2W coated with the water-based paint are conveyed in tandem. Even if it comes, both can be properly dried.
【００２５】[0025]
【発明が解決しようとする課題】しかしながら、加熱エ
ア供給ダクト２９の途中に流路切換ダンパ３２などの可
動部が存在すると、その可動部分から埃やゴミが発生し
やすく、これが未乾燥状態の塗膜に付着してブツと称す
る塗膜不良を生ずるおそれがある。However, if there is a movable part such as the flow path switching damper 32 in the middle of the heated air supply duct 29, dust or dirt is liable to be generated from the movable part, and this is undried coating. There is a possibility that it may adhere to the film and cause a coating film defect called "butsu".
【００２６】このため送風機２７の回転数をコントロー
ルすることにより、送風量を制御して、加熱エアの供給
をオンオフすることが考えられる。しかしながら、最大
送風量７００ｍ３／ｍｉｎの送風機２７を４００ｍ３／
ｍｉｎで運転する場合の立上時間及び立下時間は約１０
秒もかかる。Therefore, it is conceivable to control the number of revolutions of the blower 27 to control the amount of blown air to turn on / off the supply of heated air. However, the blower 27 of the maximum air volume 700m 3 / min 400m 3 /
When operating at min, the rise time and fall time are about 10
It takes seconds.
【００２７】このため、図３（ａ）において、夫々の送
風機２７の立上時間が夫々のタイミングＴ１、Ｔ３で１
０秒ずつ遅れると、水性塗料の塗膜温度ＷＴ２が６０℃
に達するまでに２０秒遅れて約９５秒かかるので、加熱
エア吹付ゾーン２２から搬出されるまで５０秒足らずで
あり、６０℃６０秒以上維持の乾燥条件を満たすことが
できない。また、夫々のタイミングＴ１、Ｔ３で１０秒
前から立ち上げるようにすれば、水性塗料の塗膜は適正
に乾燥できるが、有機溶剤系塗料の塗膜温度ＰＴ２が６
０℃を超えてしまう。Therefore, in FIG. 3A, the rising time of each blower 27 is 1 at each of the timings T 1 and T 3 .
If it is delayed by 0 seconds, the coating temperature WT 2 of the water-based paint will be 60 ° C.
Since it takes about 95 seconds with a delay of 20 seconds until the temperature reaches, it takes less than 50 seconds to carry out from the heated air blowing zone 22, and it is not possible to satisfy the drying condition of maintaining 60 ° C. for 60 seconds or more. Moreover, if the coating film of the water-based paint can be properly dried by starting up from 10 seconds before the respective timings T 1 and T 3 , the coating film temperature PT 2 of the organic solvent-based paint is 6
It will exceed 0 ℃.
【００２８】同様に、図３（ｂ）において、夫々の送風
機２７の立下時間が夫々のタイミングＴ１３、Ｔ１５で
１０秒ずつ遅れると、水性塗料の塗膜は適正に乾燥でき
るが、有機溶剤系塗料の塗膜温度ＰＴ３が６０℃を超え
てしまう。また、夫々のタイミングＴ１３、Ｔ１５で１
０秒前から立下げるようにすれば、有機溶剤系塗料の塗
膜は適正に乾燥できるが、塗膜温度ＷＴ３が６０℃に達
するまでに１０秒遅れて約８８秒かかるので、加熱エア
吹付エリア２４から搬出されるまで６０秒未満となり、
６０℃６０秒以上維持の乾燥条件を満たすことができな
い。Similarly, in FIG. 3B, when the fall time of each blower 27 is delayed by 10 seconds at each of the timings T 13 and T 15 , the coating film of the aqueous paint can be properly dried, but The coating film temperature PT 3 of the solvent-based paint exceeds 60 ° C. Also, at each timing T 13 and T 15 , 1
If it is started from 0 seconds before, the coating film of the organic solvent-based paint can be properly dried, but it takes about 88 seconds with a delay of 10 seconds until the coating temperature WT 3 reaches 60 ° C. It takes less than 60 seconds to get out of the area 24,
The drying condition of maintaining 60 ° C. for 60 seconds or more cannot be satisfied.
【００２９】プレヒートゾーン２３の全長を長くするこ
とができれば、送風機２７の立上時間、立下時間が多少
長くても問題ないが、この場合は、併せて搬送間隔を長
くしなければならないので生産効率が低下し、また、既
存の有機溶剤系塗料の塗装ラインを改造する場合はプレ
ヒートゾーン２３を長くするスペース的な余裕がない。If the total length of the preheat zone 23 can be lengthened, there is no problem even if the rise time and the fall time of the blower 27 are a little longer. In this case, however, it is necessary to lengthen the conveyance interval as well. The efficiency is reduced, and there is no space for extending the preheat zone 23 when modifying the existing organic solvent paint coating line.
【００３０】そこで本発明は、限られたスペースにプレ
ヒートゾーンを設置する場合でも、ダンパを用いること
なく、短時間で必要風量の加熱エアを吹き出させ、また
は、所定風量まで低下又は停止できるようにして、水性
塗料が塗装された被塗物と有機溶剤系塗料が塗装された
被塗物が前後して搬送されてきたときに、いずれの被塗
物も適正に乾燥できるようにすることを技術的課題とし
ている。Therefore, according to the present invention, even when a preheat zone is installed in a limited space, a required amount of heated air can be blown out in a short time without using a damper, or it can be lowered or stopped to a predetermined amount. Technology to enable proper drying of both the coated object coated with water-based paint and the coated object coated with organic solvent-based paint when they are transported back and forth. It is a specific subject.
【００３１】[0031]
【課題を解決するための手段】この課題を解決するため
に、請求項１の発明は、コンベアで搬送される被塗物ご
とに有機溶剤系塗料又は水性塗料を選択的に塗装する前
段の塗装ゾーンと、その塗膜に別異の塗料を重ね塗りす
る後段の塗装ゾーンとの間に形成されたプレヒートゾー
ンの加熱エア吹付エリアに加熱エアを供給する加熱エア
供給系を備えたプレヒートゾーンの加熱エア供給装置に
おいて、前記加熱エア供給系に、水性塗料の適正乾燥風
量に応じた総送風量で加熱エアを供給可能な複数台の送
風機が設けられると共に、そのうちの少なくとも１台の
送風機の最大送風量が前記適正乾燥風量未満に選定され
ていることを特徴とする。In order to solve this problem, the invention of claim 1 is a first-stage coating in which an organic solvent-based paint or a water-based paint is selectively applied to each object to be coated conveyed by a conveyor. Heating of the preheat zone with a heating air supply system that supplies heating air to the heating air blowing area of the preheat zone formed between the zone and the subsequent coating zone where different coatings are applied to the coating film. In the air supply device, the heating air supply system is provided with a plurality of fans capable of supplying the heating air with a total air amount corresponding to the appropriate drying air amount of the water-based paint, and at least one of the fans is the maximum fan. The air volume is selected to be less than the appropriate dry air volume.
【００３２】この請求項１の発明によれば、複数台の送
風機を稼動したときの総送風量が水性塗料の乾燥条件に
応じが適正乾燥風量となればよいので、最大送風量の小
さい小型の送風機を使用することができる。例えば、適
正乾燥風量が４００ｍ３／ｍｉｎである場合に、最大送
風量７００ｍ３／ｍｉｎ（１００％立上時間１７秒）の
１台の送風機を使用すると送風量４００ｍ３／ｍｉｎの
立上時間・立下時間が１０秒であるのに対し、最大送風
量３００ｍ３／ｍｉｎ（１００％立上時間１.３秒）の
送風機を２台を使用し、それぞれ送風量２００ｍ３／ｍ
ｉｎで運転すれば、総送風量４００ｍ３／ｍｉｎの立上
時間・立下時間は０.９秒となる。According to the first aspect of the present invention, the total air flow rate when operating a plurality of air blowers may be an appropriate dry air flow depending on the drying condition of the water-based paint, so that the maximum air flow rate is small and small. A blower can be used. For example, when the proper dry air volume is 400 m 3 / min, when one blower with a maximum air flow rate of 700 m 3 / min (100% startup time 17 seconds) is used, the startup time of the air flow rate of 400 m 3 / min While the fall time is 10 seconds, two blowers with a maximum air flow rate of 300 m 3 / min (100% rise time 1.3 seconds) are used, and the air flow rate is 200 m 3 / m each.
If operated at in, the rise time and fall time of the total air flow of 400 m 3 / min will be 0.9 seconds.
【００３３】したがって、請求項４の発明のようなコン
トローラを用いて、送風機をオンオフするだけで、瞬時
に、加熱エアを供給／停止を行うことができるので、埃
やゴミの発生原因となるダンパを使用しなくても、夫々
の塗膜を適正に乾燥させることができる。Therefore, by using the controller according to the fourth aspect of the present invention, it is possible to instantly supply / stop the heated air only by turning on / off the blower, so that a damper causing dust or dust can be generated. The respective coating films can be properly dried without using.
【００３４】請求項２の発明は、前記加熱エア吹付エリ
アが搬送方向に沿って複数に区分され、夫々の区分エリ
アごとに加熱エア供給系が形成されているので、各区分
エリアごとに加熱エアの供給量制御を個別に行うことが
でき、狭い搬送間隔で水性塗料と溶剤系塗料を塗装した
被塗物が交互に搬入されてくる場合や、乾燥の時間的条
件が厳しい場合であっても、夫々の塗膜は適正に乾燥さ
れる。According to a second aspect of the present invention, the heated air spray area is divided into a plurality of sections along the transport direction, and the heated air supply system is formed for each of the divided areas. It is possible to control the supply amount of each of them independently, and even when the coating materials coated with the water-based paint and the solvent-based paint are carried in alternately at a narrow transportation interval, or when the time conditions for drying are severe. , Each coating is properly dried.
【００３５】請求項３の発明は、複数台の送風機のうち
１台の送風機の最大送風量が水性塗料の適正乾燥風量以
上に選定され、他の送風機の最大送風量が前記適正乾燥
風量未満に選定されている。According to the third aspect of the present invention, the maximum air flow rate of one air blower among the plurality of air blowers is selected to be equal to or higher than the appropriate dry air flow rate of the water-based paint, and the maximum air flow rate of the other air blowers is less than the appropriate dry air flow rate. It has been selected.
【００３６】この請求項３の発明によれば、水性塗料の
適正乾燥風量で送風可能な比較的大型の送風機が用いら
れているので、連続運転するときは１台の送風機を稼動
させていれば足りる。また、他の送風機の最大送風量が
水性塗料の適正乾燥風量未満の小型のものが用いられて
いるので、その分、短時間で立ち上げることができる。
さらに、停止させるときは、大型の送風機の送風量を予
め低下させると共に、総送風量が水性塗料の適正乾燥風
量に維持されるように小型の送風機を立ち上げておき、
所定のタイミングですべての送風機を停止させれば、立
下時間の長い大型の送風機は予め送風量が低下されてい
るので、その分、短時間で立ち下げることができる。According to the third aspect of the present invention, since a relatively large blower capable of blowing an appropriate amount of dry air for the water-based paint is used, if one blower is operated during continuous operation. Is enough. Further, since a small blower having a maximum air flow rate of the other air blower less than the appropriate dry air flow rate of the water-based paint is used, the air blower can be started up by that amount in a short time.
Furthermore, when stopping, the air flow rate of the large air blower is reduced in advance, and a small air blower is started up so that the total air flow rate is maintained at the proper dry air flow rate of the water-based paint,
If all the blowers are stopped at a predetermined timing, the large blower with a long fall time has a reduced amount of blown air in advance, so that the blower can be lowered in that amount in a short time.
【００３７】[0037]
【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて具体的に説明する。図１は本発明に係るプレ
ヒートゾーンの加熱エア供給装置を示す説明図、図２は
風量変化を示すグラフ、図３は自動車ボディの位置と加
熱時間と塗膜温度の関係を示す説明図、図４は他の実施
形態の風量変化を示すグラフである。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is an explanatory view showing a heating air supply device in a preheat zone according to the present invention, FIG. 2 is a graph showing a change in air flow, and FIG. 3 is an explanatory view showing a relationship between a position of an automobile body, a heating time and a coating temperature. 4 is a graph showing a change in air volume according to another embodiment.
【００３８】本例の加熱エア供給装置１は、コンベアＣ
で搬送されてくる自動車ボディ（被塗物）２Ｐ、２Ｗに
応じてその表面に有機溶剤系塗料及び水性塗料を選択的
に塗装する前段の塗装ゾーン３と、その塗膜に別異の塗
料を重ね塗りする後段の塗装ゾーン４との間に形成され
たプレヒートゾーン５に設置される。The heated air supply apparatus 1 of this example is a conveyor C.
Depending on the car body (object to be coated) 2P, 2W that is transported by, the front coating zone 3 for selectively applying the organic solvent-based paint and the water-based paint on the surface, and a different paint for the paint film It is installed in the preheat zone 5 formed between the latter coating zone 4 and the coating zone 4 to be overcoated.
【００３９】プレヒートゾーン５は全長約１５ｍで、入
口側の１０ｍが加熱エア供給装置１から供給される８０
℃程度の加熱エアを吹き付ける加熱エア吹付エリア６に
形成され、出口側の５ｍが室温程度の冷却エアを吹き付
ける冷却エア吹付エリア７に形成され、さらに、加熱エ
ア吹付エリア６が、入口側から５ｍずつ第一区分エリア
６Ａと第二区分エリア６Ｂに分けられている。The preheat zone 5 has a total length of about 15 m, and 10 m on the inlet side is supplied from the heated air supply device 1 80.
It is formed in the heating air blowing area 6 for blowing the heating air of about ℃, 5m on the outlet side is formed in the cooling air blowing area 7 for blowing the cooling air of about room temperature, and further, the heating air blowing area 6 is 5m from the inlet side. Each is divided into a first section area 6A and a second section area 6B.
【００４０】加熱エア供給装置１は、各区分エリア６Ａ
及び６Ｂに加熱エアを供給する加熱エア供給系８、８を
備えている。各加熱エア供給系８は、区分エリア６Ａ
（６Ｂ）に接続された加熱エア供給ダクト９に、水性塗
料の適正乾燥風量Ｑｗに応じた総送風量の二台の送風機
Ｆ１、Ｆ２と、各送風機Ｆ１及びＦ２により送給される
エアを８０℃に加熱するヒータＨが介装され、各区分エ
リア６Ａ（６Ｂ）から送風機Ｆ１、Ｆ２に加熱空気を還
流する還流ダクト１０からなる。The heated air supply device 1 is provided in each divided area 6A.
And 6B are provided with heating air supply systems 8 and 8. Each heating air supply system 8 has a section area 6A
The air is supplied to the heated air supply duct 9 connected to (6B) by two air blowers F 1 and F 2 having a total air flow according to the appropriate dry air flow Qw of the water-based paint and the respective air blowers F 1 and F 2. A heater H that heats the air to 80 ° C. is interposed, and is composed of a recirculation duct 10 that recirculates the heated air from each divided area 6A (6B) to the blowers F 1 and F 2 .
【００４１】また、水性塗料を塗装した自動車ボディ２
Ｗが搬入されたきに送風機Ｆ１及びＦ２を起動し、有機
溶剤系塗料を塗装した自動車ボディ２Ｐが搬入されたき
に送風機Ｆ１及びＦ２を停止させて送風量をコントロー
ルする制御装置１１を備えている。The automobile body 2 coated with a water-based paint
A control device 11 that starts the air blowers F 1 and F 2 when W is carried in and stops the air blowers F 1 and F 2 when the automobile body 2P coated with the organic solvent-based paint is carried in to control the air flow rate is installed. I have it.
【００４２】送風機Ｆ１及びＦ２は、適正乾燥風量Ｑｗ
＝４００ｍ３／ｍｉｎのときに、夫々最大送風量が３０
０ｍ３／ｍｉｎに選定されて、夫々、送風量２００ｍ３
／ｍｉｎで稼動させることにより総送風量は４００ｍ３
／ｍｉｎとなる。The blowers F 1 and F 2 have an appropriate dry air flow Qw.
= 400 m 3 / min, the maximum air flow is 30
It was selected to be 0 m 3 / min and the air flow rate was 200 m 3 respectively.
The total air flow is 400m 3
/ Min.
【００４３】発明者の実験によれば最大送風量に達する
までの立上・立下時間は、凡そ最大送風量の比の３乗に
反比例し、最大送風量７００ｍ３／ｍｉｎ（１００％立
上・立下時間１７秒）の送風機を用いた場合の０−４０
０ｍ３／ｍｉｎの立上・立下時間が約１０秒であるのに
対し、最大送風量３００ｍ３／ｍｉｎ（１００％立上・
立下時間１.３秒）の２台の送風機Ｆ１、Ｆ２を用いる
と、０−４００ｍ３／ｍｉｎの立上・立下時間は図２
（ａ）及び（ｂ）に示すように０.９秒に短縮される。According to an experiment conducted by the inventor, the rising / falling time until reaching the maximum air flow rate is approximately inversely proportional to the cube of the ratio of the maximum air flow rate, and the maximum air flow rate is 700 m 3 / min (100% startup time).・ 0-40 when using a blower with a fall time of 17 seconds)
While the rise / fall time of 0 m 3 / min is about 10 seconds, the maximum air flow rate is 300 m 3 / min (100% rise / min.
Using two blowers F 1 and F 2 with a fall time of 1.3 seconds), a rise / fall time of 0-400 m 3 / min is shown in FIG.
It is shortened to 0.9 seconds as shown in (a) and (b).
【００４４】以上が本発明の一構成例であって、次にそ
の作用を説明する。前段の塗装ゾーン３で水性塗料が塗
装された自動車ボディ２Ｗ及び有機溶剤系塗料が塗装さ
れた全長４.５ｍの自動車ボディ２Ｐが、コンベアＣに
より、搬送速度４.２ｍ／ｍｉｎ、搬送間隔７.５ｍで混
在して搬送され、１０ｍの加熱エア吹付エリア６を１４
３秒かけて通過していく。The above is one example of the configuration of the present invention, and its operation will be described below. The vehicle body 2W coated with the water-based paint in the previous coating zone 3 and the vehicle body 2P having a total length of 4.5 m coated with the organic solvent-based paint are conveyed by the conveyor C at a conveyance speed of 4.2 m / min and a conveyance interval of 7. Transported in a mixed manner at 5 m, and heated air spraying area 6 of 10 m
It will take 3 seconds to pass.
【００４５】水性塗料が塗装された自動車ボディ２Ｗ…
が連続して搬送される場合は、２台の送風機Ｆ１及びＦ
２を稼動させ、ヒータ７で８０℃に加熱された加熱エア
を加熱エア吹付エリア６に供給する。Automotive body 2W coated with water-based paint ...
Two fans are continuously transported, two blowers F 1 and F
2 is operated and the heated air heated to 80 ° C. by the heater 7 is supplied to the heated air blowing area 6.
【００４６】このとき、自動車ボディ２Ｗの塗膜温度Ｗ
Ｔは、図３（ａ）を参照すると、加熱エア吹付エリア６
に搬入されてから約７８秒が経過した時点で水性塗料の
適正乾燥温度である６０℃に達し、そのまま６５秒程度
維持されるので、６０℃６０秒以上維持の水性塗料の適
正な乾燥条件を満たす。At this time, the coating film temperature W of the automobile body 2W
Referring to FIG. 3A, T is the heated air spray area 6
When about 78 seconds have passed since the product was loaded into the store, the temperature reaches 60 ° C, which is the proper drying temperature for the water-based paint, and the temperature is maintained for about 65 seconds. Fulfill.
【００４７】また、有機溶剤系塗料が塗装された自動車
ボディ２Ｐ…が連続して搬送される場合は、２台の送風
機Ｆ１及びＦ２を停止させれば加熱エアが供給されない
ので、加熱エア吹付エリア６の予熱で１４３秒間加熱さ
れることがあっても、有機溶剤系塗料の乾燥上限管理温
度５０℃（許容誤差＋１０％）を超えることはないので
適正な乾燥条件を満たす。Further, when the automobile body 2P coated with the organic solvent-based paint is continuously conveyed, the heating air is not supplied if the two blowers F 1 and F 2 are stopped. Even if the spraying area 6 is preheated for 143 seconds, it does not exceed the drying upper limit control temperature of 50 ° C. (permissible error + 10%) of the organic solvent-based coating material, so that an appropriate drying condition is satisfied.
【００４８】次いで、有機溶剤系塗料で塗装された先行
する自動車ボディ２Ｐに続いて、水性塗料で塗装された
後続の自動車ボディ２Ｗが搬送される場合は、その搬送
に伴って自動車ボディ２Ｗのフロント部が各区分エリア
６Ａ及び６Ｂに搬入されるときに、各熱風供給系８の２
台の送風機Ｆ１及びＦ２を起動させる。Then, when the following automobile body 2W coated with the water-based paint is conveyed after the preceding automobile body 2P coated with the organic solvent-based paint, the front of the automobile body 2W is accompanied by the conveyance. 2 of each hot air supply system 8 when the section is carried into each of the divided areas 6A and 6B.
The blowers F 1 and F 2 of the stand are activated.
【００４９】このとき、送風機Ｆ１及びＦ２の立上時間
は０.９秒と極めて短く、タイムラグを無視することが
できるので、図３（ａ）に示すように、加熱エア吹付ゾ
ーン６に搬入されてから搬出されるまで（Ｔ１〜
Ｔ５）、自動車ボディ２Ｗの塗膜に８０℃の加熱エアが
連続的に吹き付けられる。したがって、水性塗料の塗膜
温度ＷＴは、加熱エア吹付ゾーン６に搬入されてから７
８秒で６０℃に達し、その後、６５秒間その温度に維持
されることとなり、水性塗料の乾燥条件を満たす。At this time, the start-up time of the blowers F 1 and F 2 is extremely short at 0.9 seconds, and the time lag can be neglected. Therefore, as shown in FIG. From delivery to delivery (T 1 ~
T 5 ), heated air at 80 ° C. is continuously blown onto the coating film of the automobile body 2W. Therefore, the coating film temperature WT of the water-based paint is 7 after being carried into the heated air blowing zone 6.
The temperature reaches 60 ° C. in 8 seconds, and then the temperature is maintained for 65 seconds, which satisfies the drying condition of the water-based paint.
【００５０】また、先行する有機溶剤系塗料で塗装され
た自動車ボディ２Ｐは、第一区分エリア６Ａで加熱エア
の供給が開始された後、当該エリア６Ａから搬出される
（Ｔ１〜Ｔ２）まで加熱され、次いで、第二区分エリア
６Ｂで加熱エアの供給が開始される（Ｔ２〜Ｔ４）まで
放熱され、さらに、第二区分エリア６Ｂから搬出される
（Ｔ３〜Ｔ４）まで断続的に加熱される。[0050] In addition, car bodies 2P painted with organic solvent based paints preceding, after the supply of the heated air is started in the first segment area 6A, it is carried out from the area 6A (T 1 ~T 2) heated to, then, is radiated to the supply of the heated air is started in the second segment area 6B (T 2 ~T 4), further, until they are unloaded from the second section area 6B (T 3 ~T 4) It is heated intermittently.
【００５１】このとき、有機溶剤系塗料の塗膜温度ＰＴ
は、昇温・降温を繰返し、最終的に５０℃近傍に達する
が、その直後に冷却エア吹付ゾーン７に搬入されるの
で、それ以上は温度が上がらず、有機溶剤系塗料の乾燥
条件を満たす。At this time, the coating temperature PT of the organic solvent-based paint
Repeatedly raises and lowers the temperature, and finally reaches around 50 ° C, but immediately after that, it is carried into the cooling air blowing zone 7, so the temperature does not rise any further and the drying condition of the organic solvent-based paint is satisfied. .
【００５２】さらに、水性塗料で塗装された先行する自
動車ボディ２Ｗに続いて、有機溶剤系塗料で塗装された
後続の自動車ボディ２Ｐが搬送される場合は、その搬送
に伴って自動車ボディ２Ｗのリア部が各区分エリア６Ａ
及び６Ｂから搬出されると同時に、各熱風供給系８の２
台の送風機Ｆ１及びＦ２を順治停止させていく。Further, when the subsequent automobile body 2P coated with the organic solvent-based paint is transported after the preceding automobile body 2W coated with the water-based paint, the rear of the automobile body 2W is accompanied by the transportation. Department is each division area 6A
And 2 of each hot air supply system 8 at the same time as being carried out from 6B.
The blowers F 1 and F 2 of the stand are automatically stopped.
【００５３】このとき、送風機Ｆ１及びＦ２の立上時間
は０.９秒と極めて短く、タイムラグを無視することが
できるので、図３（ｂ）に示すように、加熱エア吹付ゾ
ーン６内を搬送されている間（Ｔ１１〜Ｔ１５）、自動
車ボディ２Ｗの塗膜に８０℃の加熱エアが連続的に吹き
付けられる。したがって、塗膜温度ＷＴは、加熱エア吹
付ゾーン６に搬入されてから７８秒で６０℃に達し、６
５秒間その温度に維持されることとなり、水性塗料の乾
燥条件を満たす。At this time, the start-up time of the blowers F 1 and F 2 is extremely short at 0.9 seconds, and the time lag can be ignored. Therefore, as shown in FIG. While being transported (T 11 to T 15 ), heated air at 80 ° C. is continuously blown onto the coating film of the automobile body 2W. Therefore, the coating film temperature WT reaches 60 ° C. in 78 seconds after being introduced into the heated air blowing zone 6,
The temperature is maintained for 5 seconds, which satisfies the drying condition of the water-based paint.
【００５４】また、後続の有機溶剤系塗料で塗装された
自動車ボディ２Ｐは、第一区分エリア６Ａに搬入されて
から加熱エアの供給が停止される（Ｔ１２〜Ｔ１ ３）ま
で加熱され、次いで、第二区分エリア６Ｂに搬入される
（Ｔ１３〜Ｔ１４）まで放熱され、さらに、第二区分エ
リア６Ｂはへの加熱エアの供給が停止される（Ｔ１３〜
Ｔ１４）まで断続的に加熱される。[0054] In addition, car bodies 2P painted with subsequent organic solvent-based paints, the supply of the heated air from being carried into the first section area 6A is heated until it is stopped (T 12 ~T 1 3), then, heat is radiated until is carried into the second section area 6B (T 13 ~T 14), further supply of the heating air to the second section area 6B is stopped (T 13 ~
Heated intermittently until T 14 ).
【００５５】このとき塗膜温度ＰＴは、昇温・降温を繰
り返すが、最終的に５５℃程度に抑えられ、有機溶剤系
塗料の乾燥上限管理温度５０℃の許容誤差である＋１０
％以内であるので、有機溶剤系塗料の乾燥条件を満た
す。At this time, the coating film temperature PT is repeatedly raised and lowered, but is finally suppressed to about 55 ° C., which is an allowable error of the drying upper limit control temperature of 50 ° C. of the organic solvent type paint +10.
%, So that the drying condition for the organic solvent-based paint is satisfied.
【００５６】図４は、適正乾燥風量Ｑｗ＝４００ｍ３／
ｍｉｎに対し、最大送風量が７００ｍ３／ｍｉｎ、１０
０％立上・立下時間が１７秒の主送風機Ｆ１と、最大送
風量が３００ｍ３／ｍｉｎ、１００％立上／立下時間が
１.３秒の補助送風機Ｆ２を使用した場合の風量変化を
示すグラフである。FIG. 4 shows an appropriate dry air flow Qw = 400 m 3 /
Maximum air flow rate is 700 m 3 / min for 10 min
When using a main blower F 1 with a 0% rise and fall time of 17 seconds and an auxiliary blower F 2 with a maximum blow rate of 300 m 3 / min and a 100% rise / fall time of 1.3 seconds It is a graph which shows air volume change.
【００５７】図４（ａ）は加熱エアの供給開始時におけ
る風量変化を示し、補助送風機Ｆ２は起動開始
（Ｔ２１）から１.３秒で風量Ｑ２＝３００ｍ３／ｍｉ
ｎに達し（Ｔ２２）、主送風機Ｆ１は約２.４秒（Ｔ
２３）で風量Ｑ１＝１００ｍ ３／ｍｉｎに達するので、
自動車ボディ２Ｗが搬入された後、約２.４秒で水性塗
料の適正乾燥送風量Ｑｗ＝４００ｍ３／ｍｉｎに達す
る。FIG. 4 (a) should be placed at the start of heating air supply.
Auxiliary blower FTwoStart to boot
(T21) To 1.3 secondsTwo= 300mThree/ Mi
n (T22), Main blower F1Is about 2.4 seconds (T
23) With air volume Q1= 100m Three/ Min, so
A water-based coating is applied in about 2.4 seconds after the car body 2W is loaded.
Air flow rate Qw = 400mThreeReach / min
It
【００５８】その後も主送風機Ｆ１はその風量が増大し
ていくので、総送風量Ｑｔ＝Ｑｗ＝４００ｍ３／ｍｉｎ
に維持されるように、補助送風機Ｆ２の風量を徐々に低
下させていき、起動開始（Ｔ２１）から約１０秒経過し
て主送風機Ｆ１の風量Ｑ１＝Ｑｗ＝４００ｍ３／ｍｉｎ
に達した時点で補助送風機Ｆ２を停止させ（Ｔ２４）、
以後は主送風機Ｆ１のみで送風する。Since the air volume of the main air blower F 1 increases thereafter, the total air flow rate Qt = Qw = 400 m 3 / min.
The air flow rate of the auxiliary blower F 2 is gradually decreased so that the air flow rate of the main blower F 1 is Q 1 = Qw = 400 m 3 / min after about 10 seconds have elapsed from the start (T 21 ).
The auxiliary blower F 2 is stopped (T 24 ),
After that, only the main blower F 1 blows air.
【００５９】図４（ｂ）は加熱エアの供給を停止する時
の風量変化を示し、例えば先行の自動車ボディ２Ｗのリ
ア部が区分エリア６Ａ又は６Ｂの出口に近づいた時点
（Ｔ３１）で主送風機Ｆ１の風量を１００ｍ３／ｍｉｎ
まで低下させると同時に、総送風量がＱｔ＝Ｑｗ＝４０
０ｍ３／ｍｉｎに維持されるように、補助送風機Ｆ２を
起動して３００ｍ３／ｍｉｎまで徐々に上昇させておく
（Ｔ３２）。FIG. 4 (b) shows a change in air volume when the supply of heated air is stopped. For example, when the rear part of the preceding automobile body 2W approaches the exit of the sectional area 6A or 6B (T 31 ), Air volume of blower F 1 is 100 m 3 / min
At the same time, the total air flow is Qt = Qw = 40
As will be maintained at 0 m 3 / min, kept gradually increased to 300 meters 3 / min to start the auxiliary blower F 2 (T 32).
【００６０】そして、先行する自動車ボディ２Ｗが搬出
されてから２台の送風機Ｆ１及びＦ２を停止すれば（Ｔ
３３）、補助送風機Ｆ２の立下時間が極めて短いことか
ら、その総送風量Ｑｔは１.３秒経過後（Ｔ３４）に約
５０ｍ３／ｍｉｎまで急激に低下し、２.４秒経過後
（Ｔ３５）には０ｍ３／ｍｉｎになる。If the two blowers F 1 and F 2 are stopped after the preceding automobile body 2W is carried out (T
33 ), since the fall time of the auxiliary blower F 2 is extremely short, the total blow rate Qt of the auxiliary blower F 2 rapidly decreases to about 50 m 3 / min after 1.3 seconds (T 34 ), and 2.4 seconds have passed. After that (T 35 ), it becomes 0 m 3 / min.
【００６１】この場合も、僅か２.４秒で適正乾燥風量
まで立上げ、立下げることができるので、上述と同様
に、そのタイムラグをほとんど無視して、水性塗料及び
有機溶剤系塗料を適正に乾燥させることができる。Also in this case, since it is possible to rise and fall to the proper dry air volume in only 2.4 seconds, the time lag is almost ignored and the water-based paint and the organic solvent-based paint are properly used, as described above. It can be dried.
【００６２】なお、上述の説明では、長さ１０ｍの加熱
エア吹付エリア６を５ｍごとの第一及び第二区分エリア
６Ａ及び６Ｂに区分して、加熱エア供給系８を夫々に設
ける場合について説明したが、乾燥条件がそれほど厳し
くない場合や、搬送間隔が長い場合は、一つの加熱エア
供給系８から加熱エア吹付エリア６全体に加熱エアを供
給する場合であっても良い。In the above description, the heating air blowing area 6 having a length of 10 m is divided into the first and second division areas 6A and 6B every 5 m, and the heating air supply system 8 is provided for each. However, when the drying conditions are not so severe or when the conveyance interval is long, the heating air may be supplied from one heating air supply system 8 to the entire heating air blowing area 6.
【００６３】また、有機溶剤系塗料が塗られた自動車ボ
ディを乾燥させる場合に、各送風機Ｆ１及びＦ２を完全
に停止させる場合について説明したが、乾燥過多の乾燥
不良を起さない範囲であれば、各送風機Ｆ１及びＦ２を
停止させることなく微風で運転してもよい。Further, when the automobile body coated with the organic solvent-based paint is dried, the case where the blowers F 1 and F 2 are completely stopped has been described, but within a range that does not cause drying failure due to excessive drying. If so, the blowers F 1 and F 2 may be operated with a slight breeze without being stopped.
【００６４】さらに、上述の説明で使用したプレヒート
ゾーン５や加熱エア吹付エリア６の長さ、コンベアＣの
搬送速度、搬送間隔、適正乾燥風量Ｑｗ、各送風機Ｆ１
及びＦ２の最大送風量、送風機の設置台数は、いずれも
一例であって、これらの数値に限定されるものではな
い。Furthermore, the lengths of the preheat zone 5 and the heated air blowing area 6 used in the above description, the conveying speed of the conveyor C, the conveying interval, the proper dry air volume Qw, the blowers F 1
The maximum air flow rate of F 2 and F 2 and the number of installed blowers are merely examples, and are not limited to these numerical values.
【００６５】[0065]
【発明の効果】以上述べたように、本発明によれば、加
熱エアが供給されるまでの送風機の立上時間及び加熱エ
アの供給が停止されるまでの送風機の立下時間を短縮す
ることができるので、水性塗料及び有機溶剤系塗料が塗
られた自動車ボディが前後に混合されて搬送される塗装
ラインに短いプレヒートゾーンを設置しなければならな
いような場合でも、生産効率を低下させることなく、時
間的に余裕を持たせて、各被塗物を夫々の塗料の乾燥条
件で適正に乾燥させることができるという大変優れた効
果を奏する。As described above, according to the present invention, it is possible to shorten the start-up time of the blower until the heated air is supplied and the fall time of the blower until the supply of the heated air is stopped. Therefore, even if it is necessary to install a short preheat zone in the coating line where the vehicle body coated with the water-based paint and the organic solvent-based paint is mixed and transported back and forth, the production efficiency is not reduced. The present invention has an extremely excellent effect that each object to be coated can be appropriately dried under the drying condition of each coating material with a time margin.
【図１】本発明に係るプレヒートゾーンの加熱エア供給
装置を示す説明図。FIG. 1 is an explanatory view showing a heated air supply device in a preheat zone according to the present invention.
【図２】風量変化を示すグラフ。FIG. 2 is a graph showing changes in air volume.
【図３】自動車ボディの位置と時間と温度変化の関係を
示すグラフ。FIG. 3 is a graph showing the relationship between the position of the automobile body, time, and temperature change.
【図４】他の実施形態の風量変化を示すグラフ。FIG. 4 is a graph showing changes in air volume according to another embodiment.
【図５】従来装置を示す説明図。FIG. 5 is an explanatory view showing a conventional device.
【符号の説明】 １………加熱エア供給装置 Ｃ………コンベア ２Ｗ、２Ｐ………自動車ボディ（被塗物） ３………前段の塗装ゾーン ４………後段の塗装ゾーン ５………プレヒートゾーン ６………加熱エア吹付エリア ６Ａ，６Ｂ………区分エリア Ｆ１、Ｆ２……送風機 Ｈ………ヒータ ８………加熱エア供給系 １１………制御装置[Explanation of Codes] 1 ... Heated air supply device C ..... Conveyor 2W, 2P .... Automotive body (object to be coated) 3 ... Front coating zone 4 ... Rear coating zone 5 ... ... Preheat zone 6 ... Heating air blowing areas 6A, 6B ... Division areas F 1 , F 2 ... Blower H ... ... Heater 8 ... ... Heating air supply system 11 ... Control device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 後 藤 征 弘 愛知県豊田市柿本町一丁目９番地 トリニ ティ工業株式会社内 Ｆターム(参考） 3L113 AA03 AB02 AC07 AC35 BA33 CB24 DA09 DA24 4F042 AA09 BA13 DB02 DB15 DB26 DB29 DB31 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Masahiro Goto Trini, 1-9 Kakimoto-cho, Toyota City, Aichi Prefecture Within Tee Industry Co., Ltd. F term (reference) 3L113 AA03 AB02 AC07 AC35 BA33 CB24 DA09 DA24 4F042 AA09 BA13 DB02 DB15 DB26 DB29 DB31
Claims (4)
Ｐ、２Ｗ）ごとに有機溶剤系塗料又は水性塗料を選択的
に塗装する前段の塗装ゾーン（３）と、その塗膜に別異
の塗料を重ね塗りする後段の塗装ゾーン（４）との間に
形成されたプレヒートゾーン（３）の加熱エア吹付エリ
ア（６）に加熱エアを供給する加熱エア供給系（８）を
備えたプレヒートゾーンの加熱エア供給装置において、 前記加熱エア供給系（８）に、水性塗料の適正乾燥風量
に応じた総送風量で加熱エアを供給可能な複数台の送風
機（Ｆ１、Ｆ２）が設けられると共に、そのうちの少な
くとも１台の送風機（Ｆ２）の最大送風量が前記適正乾
燥風量未満に選定されていることを特徴とするプレヒー
トゾーンの加熱エア供給装置。1. An article to be coated (2) conveyed by a conveyor (C).
(P, 2W) between the former coating zone (3) that selectively coats the organic solvent-based paint or the water-based paint and the latter coating zone (4) that coats the paint film with another paint. A heating air supply device for a preheating zone, comprising a heating air supply system (8) for supplying heating air to a heating air spraying area (6) of a preheating zone (3) formed on the above-mentioned heating air supply system (8). Is provided with a plurality of blowers (F 1 , F 2 ) capable of supplying heated air with a total blow rate according to the appropriate dry air rate of the water-based paint, and at least one of the blowers (F 2 ) has a maximum A heated air supply device in a preheat zone, wherein an air blowing amount is selected to be less than the appropriate dry air amount.
に沿って複数に区分され、夫々の区分エリアごとに前記
加熱エア供給系（８）が形成されてなる請求項１記載の
プレヒートゾーンの加熱エア供給装置。2. The preheat zone according to claim 1, wherein the heated air blowing area (6) is divided into a plurality of sections along the conveying direction, and the heated air supply system (8) is formed for each divided area. Heating air supply device.
風機（Ｆ１）の最大送風量が水性塗料の適正乾燥風量以
上に選定され、他の送風機（Ｆ２）の最大送風量が前記
適正乾燥風量未満に選定されてなる請求項１又は２記載
のプレヒートゾーンの加熱エア供給装置。3. The maximum blow rate of one blower (F 1 ) of the blowers (F 1 and F 2 ) is selected to be equal to or more than an appropriate dry blow rate of the water-based paint, and the maximum blow rate of another blower (F 2 ) is selected. The heating air supply device for the preheat zone according to claim 1 or 2, wherein the air volume is selected to be less than the appropriate dry air volume.
燥する際に総送風量が水性塗料の適正乾燥風量となるよ
うに送風機（Ｆ１、Ｆ２）を稼動させ、有機溶剤系塗料
が塗装された被塗物（２Ｐ）を乾燥する際に送風機（Ｆ
１、Ｆ２）を停止させ又は微風量で稼動させるように各
送風機（Ｆ１、Ｆ２）をコントロールする制御装置
（９）を備えた請求項１、２又は３記載のプレヒートゾ
ーンの加熱エア供給装置。4. An organic solvent is operated by operating a blower (F 1 , F 2 ) so that the total air flow rate becomes an appropriate dry air flow rate of the water-based paint when drying an object (2 W) coated with the water-based paint. When drying the coated object (2P) coated with a system paint, blower (F
1, F 2) is stopped or breeze amount operation is thereby such that each fan (F 1, F 2) control to the control device (9) heating the air preheat zone according to claim 1, wherein with a a Supply device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001393148A JP2003190866A (en) | 2001-12-26 | 2001-12-26 | Apparatus for supplying heating air to preheat zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001393148A JP2003190866A (en) | 2001-12-26 | 2001-12-26 | Apparatus for supplying heating air to preheat zone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003190866A true JP2003190866A (en) | 2003-07-08 |
Family
ID=27600207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001393148A Pending JP2003190866A (en) | 2001-12-26 | 2001-12-26 | Apparatus for supplying heating air to preheat zone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003190866A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449319A (en) * | 2019-09-09 | 2019-11-15 | 李荣兵 | Clothes hanger cement dipping machine |
-
2001
- 2001-12-26 JP JP2001393148A patent/JP2003190866A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449319A (en) * | 2019-09-09 | 2019-11-15 | 李荣兵 | Clothes hanger cement dipping machine |
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