JP2007313488A - Oven for baking and drying coats - Google Patents

Oven for baking and drying coats Download PDF

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JP2007313488A
JP2007313488A JP2006148871A JP2006148871A JP2007313488A JP 2007313488 A JP2007313488 A JP 2007313488A JP 2006148871 A JP2006148871 A JP 2006148871A JP 2006148871 A JP2006148871 A JP 2006148871A JP 2007313488 A JP2007313488 A JP 2007313488A
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work
carry
workpiece
path
heating furnace
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Akio Ishimaru
昭夫 石丸
Noriaki Ojima
範昌 於島
Yoshimitsu Iyoda
義充 伊与田
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Parker Engineering Co Ltd
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Parker Engineering Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an oven for baking and drying coats having a shortened oven length compared with a conventional oven for baking and drying coats using a gas having a specific heat greater than that of air as a heating gas. <P>SOLUTION: A tunnel type oven for baking and drying coats having a carry-in passage for a work, a heating oven for the work and a carry-out passage for the work is provided with a means for supplying a superheated steam supplying the superheated steam to the heating oven for the work, and a means for heating air heating the air of the end part of the heating-oven-for-the-work side of the carry-in passage for the work and the air of the end part of the heating-oven-for-the-work side of the carry-out passage for the work. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、塗装焼付乾燥炉に関するものである。 The present invention relates to a paint baking drying furnace.

直列に連結されたワーク搬入路とワーク加熱炉とワーク搬出路とを備えるトンネル型塗装焼付乾燥炉であって、加熱空気がワーク加熱炉に循環供給される塗装焼付乾燥炉が、特許文献１等に開示されている。
特開平７−１９０６２０号公報 Patent Document 1 or the like is a tunnel-type paint baking and drying furnace provided with a workpiece carry-in path, a workpiece heating furnace, and a workpiece carry-out path that are connected in series, and in which heated air is circulated and supplied to the workpiece heating furnace. Is disclosed.
Japanese Patent Laid-Open No. 7-190620

特許文献１等に開示された従来の塗装焼付乾燥炉では、加熱ガスとして空気を用いているが、空気よりも比熱の大きなガスを加熱ガスとして使用すれば、加熱ガスからワークへの熱伝達量が増加し、ワークの乾燥時間、ひいては塗装焼付乾燥炉の炉長を短縮できると考えられる。
本発明は空気よりも比熱の大きなガスを加熱ガスとして使用することにより、従来の塗装焼付乾燥炉に比べてワークの乾燥時間、ひいては炉長が短縮された塗装焼付乾燥炉を提供することを目的とする。 In the conventional paint baking and drying furnace disclosed in Patent Document 1 and the like, air is used as the heating gas. However, if a gas having a specific heat higher than that of air is used as the heating gas, the amount of heat transferred from the heating gas to the workpiece. It is considered that the drying time of the workpiece, and thus the length of the paint baking drying furnace can be shortened.
An object of the present invention is to provide a paint baking drying furnace in which the drying time of the workpiece and, consequently, the furnace length is shortened as compared with the conventional paint baking drying furnace by using a gas having a specific heat higher than that of air as a heating gas. And

上記目的を達成するために、本発明においては、直列に連結されたワーク搬入路とワーク加熱炉とワーク搬出路とを備えるトンネル型塗装焼付乾燥炉であって、ワーク加熱炉に過熱水蒸気を供給する過熱水蒸気供給手段と、ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部の空気を加熱する空気加熱手段とを備えることを特徴とするトンネル型塗装焼付乾燥炉を提供する。
本発明に係る塗装焼付乾燥炉においては、加熱ガスとして、比熱が空気の数倍大きい過熱水蒸気を使用することにより、加熱ガスからワークへの熱伝達量を増加させ、ワークの乾燥時間の短縮、ひいては炉長の短縮を図っている。
ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部の空気を加熱することにより、ワーク加熱炉のワーク搬入路、ワーク搬出路との接続部で、過熱水蒸気が常温の空気と接触して結露するのを防止することができる。 In order to achieve the above object, according to the present invention, a tunnel-type paint baking and drying furnace including a work carry-in path, a work heating furnace, and a work carry-out path connected in series, and supplying superheated steam to the work heating furnace. A tunnel-type paint baking and drying furnace comprising: a superheated steam supply means for performing heating; and an air heating means for heating air at a work heating furnace side end of the work carry-in path and a work heating furnace side end of the work carry-out path. I will provide a.
In the coating baking drying furnace according to the present invention, by using superheated steam having a specific heat several times larger than that of air as a heating gas, the amount of heat transfer from the heating gas to the workpiece is increased, and the drying time of the workpiece is shortened. As a result, the furnace length is shortened.
By heating the air at the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path, the superheated steam is at room temperature at the connection between the work carry-in path and the work carry-out path of the work heating furnace. It is possible to prevent condensation on contact with the air.

本発明の好ましい態様においては、過熱水蒸気供給手段は過熱水蒸気を循環供給する。
過熱水蒸気を循環供給することにより、塗装焼付乾燥炉外への熱の放出を防止し、塗装焼付乾燥炉の熱効率を高めることができる。
本発明の好ましい態様においては、空気加熱手段はワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに加熱空気を供給する加熱空気供給手段である。
ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに加熱空気を供給することにより、ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部の空気を確実に加熱することができる。
本発明の好ましい態様においては、加熱空気供給手段は、ワーク搬入路のワーク加熱炉側端部の所定長さ領域と、ワーク搬出路のワーク加熱炉側端部の所定長さ領域とに亙って、ワーク搬入路とワーク搬出路とを横断する加熱空気のエアカーテンを、ワーク搬入路内とワーク搬出路内とに形成する。
加熱空気のエアカーテンが形成されることにより、常温の外気が過熱水蒸気に接触する事態の発生が確実に防止される。
本発明の好ましい態様においては、加熱空気供給手段は加熱空気を循環供給する。
加熱空気を循環供給することにより、塗装焼付乾燥炉外への熱の放出を防止し、塗装焼付乾燥炉の熱効率を高めることができる。
本発明の好ましい態様においては、塗装焼付乾燥炉は、加熱空気の一部を換気する換気手段を備える。
ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに循環供給される加熱空気は、過熱水蒸気に接することにより湿度が上昇する。加熱空気の湿度が上昇すると、加熱空気と常温の空気との接触域で結露する可能性がある。加熱空気の一部を換気することにより、加熱空気の湿度上昇を防止し、結露を防止することができる。
本発明の好ましい態様においては、過熱水蒸気供給手段は過熱水蒸気を循環供給し、空気加熱手段はワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに加熱空気を循環供給し、塗装焼付乾燥炉は更に、加熱空気の一部を換気する換気手段と過熱水蒸気を補給する過熱水蒸気補給手段とを備える。
過熱水蒸気の一部は加熱空気に連行され、加熱空気の一部は換気される。この結果、ワーク加熱炉内を循環する過熱水蒸気の量が減少する。過熱水蒸気を補給することにより、ワーク加熱炉内を循環する過熱水蒸気の量が減少するのを防止することができる。
本発明の好ましい態様においては、ワーク搬入路の入口とワーク搬出路の出口とは、ワーク加熱炉よりも下方に配設されている。
ワーク搬入路の入口とワーク搬出路の出口とを、ワーク加熱炉よりも下方に配設することにより、ワークの出入りの際に、塗装焼付乾燥炉から過熱水蒸気が流出するのを防止することができる。 In a preferred embodiment of the present invention, the superheated steam supply means circulates and supplies superheated steam.
By circulating and supplying superheated steam, it is possible to prevent the heat from being released to the outside of the paint baking drying furnace, and to increase the thermal efficiency of the paint baking drying furnace.
In a preferred aspect of the present invention, the air heating means is heated air supply means for supplying heated air to the workpiece heating furnace side end of the workpiece carry-in path and the workpiece heating furnace side end of the workpiece carry-out path.
By supplying heated air to the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path, the work heating furnace side end of the work carry-in path and the work heating furnace side of the work carry-out path The air at the end can be reliably heated.
In a preferred aspect of the present invention, the heated air supply means extends over a predetermined length region at the work heating furnace side end of the work carry-in path and a predetermined length region at the work heating furnace side end of the work carry-out path. Thus, an air curtain of heated air that crosses the work carry-in path and the work carry-out path is formed in the work carry-in path and the work carry-out path.
By forming the air curtain of heated air, it is possible to reliably prevent the occurrence of a situation in which ambient air at normal temperature comes into contact with superheated steam.
In a preferred embodiment of the present invention, the heated air supply means circulates and supplies heated air.
By circulatingly supplying the heated air, it is possible to prevent the heat from being released to the outside of the paint baking drying furnace, and to increase the thermal efficiency of the paint baking drying furnace.
In a preferred embodiment of the present invention, the paint baking and drying furnace includes a ventilation means for ventilating a part of the heated air.
The heating air circulated and supplied to the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path is brought into contact with the superheated steam to increase the humidity. When the humidity of the heated air rises, there is a possibility of dew condensation in the contact area between the heated air and room temperature air. By ventilating a part of the heated air, an increase in the humidity of the heated air can be prevented and condensation can be prevented.
In a preferred embodiment of the present invention, the superheated steam supply means circulates and supplies superheated steam, and the air heating means supplies heated air to the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path. The circulation baking drying furnace further includes ventilation means for ventilating a part of the heated air and superheated steam supply means for supplying superheated steam.
A portion of the superheated steam is entrained in the heated air and a portion of the heated air is ventilated. As a result, the amount of superheated steam circulating in the workpiece heating furnace is reduced. By replenishing the superheated steam, it is possible to prevent the amount of superheated steam circulating in the workpiece heating furnace from decreasing.
In a preferred aspect of the present invention, the work carry-in path entrance and the work carry-out path exit are disposed below the work heating furnace.
By arranging the entrance of the work carry-in path and the exit of the work carry-out path below the work heating furnace, it is possible to prevent the superheated steam from flowing out of the paint baking drying furnace when the work enters and exits. it can.

本発明に係る塗装焼付乾燥炉においては、加熱ガスとして、比熱が空気の数倍大きい過熱水蒸気を使用することにより、加熱ガスからワークへの熱伝達を高め、ワークの乾燥時間を短縮し、炉長を短縮している。
ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とを予熱することにより、ワーク加熱炉のワーク搬入路、ワーク搬出路との接続部で、過熱水蒸気が常温の空気と接触して結露するのを防止することができる。 In the paint baking drying furnace according to the present invention, by using superheated steam having a specific heat several times larger than that of air as the heating gas, heat transfer from the heating gas to the work is improved, and the drying time of the work is shortened. The length is shortened.
By preheating the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path, the superheated steam is at room temperature at the connection between the work carry-in path and the work carry-out path of the work heating furnace. It is possible to prevent condensation from coming into contact with air.

本発明の実施例に係る塗装焼付乾燥炉を説明する。 The paint baking drying furnace which concerns on the Example of this invention is demonstrated.

図１に示すように、塗装焼付乾燥炉Ａは、直列に連結されたＬ形に屈曲したワーク搬入路１と直線状のワーク加熱炉２とＬ形に屈曲したワーク搬出路３とを備えるトンネル型塗装焼付乾燥炉である。ワーク搬入路１の入口１ａとワーク搬出路３の出口３ａとは、ワーク加熱炉２よりも下方に配設されている。
ワーク加熱炉２は２００〜３００℃の過熱水蒸気で満たされている。塗装焼付乾燥炉Ａは、ファン４とヒータ５とを有し、ワーク加熱炉２内の過熱水蒸気をワーク過熱炉２の長手方向の一端から吸い出し、加熱してワーク過熱炉２の長手方向の一端からワーク加熱炉２内に吹き込んで、ワーク加熱炉に過熱水蒸気を循環供給する過熱水蒸気供給装置６を備えている。
塗装焼付乾燥炉Ａは、図示しない過熱水蒸気発生装置を有し２００〜３００℃の過熱水蒸気をワーク過熱炉２の長手方向の他端からワーク加熱炉２内に吹き込む過熱水蒸気補給装置７を備えている。
塗装焼付乾燥炉Ａは、ヒータ８とファン９、１０とを有し、ワーク搬出路３のワーク加熱炉２側端部に１２０℃程度の温度の加熱空気を循環供給する加熱空気供給装置１１を備えている。加熱空気供給装置１１は、ワーク搬出路３のワーク加熱炉２側端部の所定長さ領域に亙って、ワーク搬出路３を横断する加熱空気のエアカーテンを、ワーク搬出路３内に形成する。
塗装焼付乾燥炉Ａは、熱交換機１２を有する換気装置１３を備えている。加熱空気供給装置１１が形成する循環加熱空気流の一部が、熱交換器１２を通って外部環境に排出され、外部環境に排出される加熱空気と同量の外気が熱交換器１２を通って、加熱空気供給装置１１が形成する循環加熱空気流に合流する。
塗装焼付乾燥炉Ａは、ワーク搬入路１のワーク加熱炉２側端部にも、加熱空気供給装置１１と換気装置１３とを備えている。 As shown in FIG. 1, a coating baking / drying furnace A is a tunnel including an L-shaped workpiece carry-in path 1, a linear workpiece heating furnace 2, and a L-shaped workpiece carry-out path 3 connected in series. It is a mold painting baking oven. An inlet 1 a of the workpiece carry-in path 1 and an outlet 3 a of the workpiece carry-out path 3 are disposed below the workpiece heating furnace 2.
The work heating furnace 2 is filled with superheated steam at 200 to 300 ° C. The paint baking / drying furnace A has a fan 4 and a heater 5, sucks out superheated steam in the work heating furnace 2 from one end in the longitudinal direction of the work superheating furnace 2, heats it, and heats one end in the longitudinal direction of the work superheating furnace 2. Is provided with a superheated steam supply device 6 which is blown into the work heating furnace 2 and circulates and supplies the superheated steam to the work heating furnace.
The coating baking / drying furnace A has a superheated steam supply device 7 having a superheated steam generator (not shown) for blowing superheated steam at 200 to 300 ° C. into the work heating furnace 2 from the other end in the longitudinal direction of the work superheating furnace 2. Yes.
The coating baking and drying furnace A has a heater 8 and fans 9 and 10, and a heating air supply device 11 that circulates and supplies heated air having a temperature of about 120 ° C. to the workpiece heating furnace 2 side end of the workpiece carry-out path 3. I have. The heated air supply device 11 forms an air curtain of heated air across the workpiece carry-out path 3 in the workpiece carry-out path 3 over a predetermined length region at the workpiece heating furnace 2 side end of the workpiece carry-out path 3. To do.
The paint baking drying furnace A includes a ventilation device 13 having a heat exchanger 12. Part of the circulating heated air flow formed by the heated air supply device 11 is discharged to the outside environment through the heat exchanger 12, and the same amount of outside air as the heated air discharged to the outside environment passes through the heat exchanger 12. Then, it joins with the circulating heated air flow formed by the heated air supply device 11.
The coating baking / drying furnace A is also provided with a heated air supply device 11 and a ventilation device 13 at the end of the work carry-in path 1 on the work heating furnace 2 side.

塗装焼付乾燥炉Ａの作動を説明する。
図示しない塗装ブースから搬出されたワークＷが、スキッド上に固定され、コンベアに乗って、入口１ａから２０℃程度の常温のワーク搬入路１へ進入し、コンベアからエレベータに乗り換えて上昇し、ワーク搬入路１のワーク加熱炉２側端部に所定長さ領域に亙って形成された１２０℃程度の加熱空気のエアカーテンを通って、ワーク加熱炉２の長手方向一端部に進入する。
ワークＷは、コンベアに乗ってワーク加熱炉２内を長手方向の他端部へ向けて進む。ワーク加熱炉２内に充満した２００〜３００℃の過熱水蒸気に接して、ワークＷは過熱され、塗装被膜が焼付乾燥される。
ワーク加熱炉２の他端部に到達したワークＷは、エレベータに乗り下降し、ワーク搬出路３のワーク加熱炉２側端部に所定長さ領域に亙って形成された１２０℃程度の加熱空気のエアカーテンを通って、２０℃程度の常温のワーク搬出路３に進入し、エレベータからコンベアに乗り換え、出口３ａからワーク搬出路３外へ出る。 The operation of the paint baking drying furnace A will be described.
The workpiece W unloaded from the painting booth (not shown) is fixed on the skid, gets on the conveyor, enters the workpiece loading path 1 at a room temperature of about 20 ° C. from the entrance 1a, changes from the conveyor to the elevator, and rises. The work heating furnace 2 enters an end portion in the longitudinal direction of the work heating furnace 2 through an air curtain of heated air of about 120 ° C. formed over a predetermined length region at the end of the carry-in path 1 on the work heating furnace 2 side.
The workpiece W rides on the conveyor and proceeds in the workpiece heating furnace 2 toward the other end portion in the longitudinal direction. In contact with 200 to 300 ° C. superheated steam filled in the workpiece heating furnace 2, the workpiece W is heated and the coating film is baked and dried.
The workpiece W that has reached the other end of the workpiece heating furnace 2 rides down on the elevator, and is heated at about 120 ° C. over a predetermined length region at the workpiece heating furnace 2 side end of the workpiece carry-out path 3. After passing through the air curtain of air, it enters the work carry-out path 3 at a room temperature of about 20 ° C., changes from the elevator to the conveyor, and goes out of the work carry-out path 3 from the exit 3a.

ワーク加熱炉２内の過熱水蒸気の一部は、加熱空気のエアカーテンに連行されて最終的に外部環境に放出されるが、加熱空気のエアカーテンに連行された量と同量の過熱水蒸気が、過熱水蒸気補給装置７からワーク加熱炉２に供給される。
加熱空気のエアカーテンはワーク加熱炉２内の過熱水蒸気の一部を連行するが、換気装置１３により加熱空気の一部が外気と換気されることにより、加熱空気の湿度上昇が防止される。 A part of the superheated steam in the work heating furnace 2 is entrained in the air curtain of the heated air and finally released to the external environment, but the same amount of superheated steam as the amount entrained in the air curtain of the heated air is generated. Then, it is supplied from the superheated steam supply device 7 to the work heating furnace 2.
The air curtain of the heated air entrains a part of the superheated steam in the workpiece heating furnace 2, but a part of the heated air is ventilated with the outside air by the ventilation device 13, thereby preventing an increase in the humidity of the heated air.

塗装焼付乾燥炉Ａにおいては、加熱ガスとして、比熱が空気の数倍大きい過熱水蒸気を使用しているので、ワークＷに接触することによる加熱ガス温度の低下量が、加熱空気を使用する場合に比べて少ない。この結果、加熱ガスからワークＷへの熱伝達量が加熱空気を使用する場合に比べて増加し、ワークＷの乾燥時間が短縮され、ワーク加熱炉２の炉長が短縮される。
塗装焼付乾燥炉Ａにおいては、ワーク搬入路１のワーク加熱炉２側端部とワーク搬出路３のワーク加熱炉２側端部の空気を加熱しているので、ワーク加熱炉２のワーク搬入路１、ワーク搬出路３との接続部で、過熱水蒸気が常温の空気と接触して結露する事態の発生が防止される。結露が発生すると、ワークＷに水滴が付着して乾燥塗膜の均質性が損なわれ、或いはワーク搬入路１、ワーク搬出路３の下部に水溜まりができる等の不具合を生ずるおそれがある。
塗装焼付乾燥炉Ａにおいては、過熱水蒸気供給装置６を配設して、ワーク加熱炉２に過熱水蒸気を循環供給することにより、塗装焼付乾燥炉Ａ外への熱の放出を防止し、塗装焼付乾燥炉Ａの熱効率を高めている。
塗装焼付乾燥炉Ａにおいては、加熱空気供給装置１１を配設して、ワーク搬入路１のワーク加熱炉２側端部とワーク搬出路３のワーク加熱炉２側端部とに、加熱空気を供給することにより、ワーク搬入路１のワーク加熱炉２側端部とワーク搬出路３のワーク加熱炉２側端部の空気を確実に所定温度に加熱している。
塗装焼付乾燥炉Ａにおいては、加熱空気供給装置１１は、ワーク搬入路１のワーク加熱炉２側端部の所定長さ領域と、ワーク搬出路３のワーク加熱炉２側端部の所定長さ領域とに亙って、ワーク搬入路１とワーク搬出路３とを横断する加熱空気のエアカーテンを、ワーク搬入路１内とワーク搬出路３内とに形成するので、常温の外気が過熱水蒸気に接触する事態の発生が確実に防止される。
塗装焼付乾燥炉Ａにおいては、加熱空気供給装置１１を配設して、加熱空気を循環供給することにより、塗装焼付乾燥炉Ａ外への熱の放出を防止し、塗装焼付乾燥炉Ａの熱効率を高めている。
塗装焼付乾燥炉Ａにおいては、換気装置１３を配設して、加熱空気の一部を外気と換気することにより、過熱水蒸気の一部を連行することによる加熱空気の湿度上昇を防止し、加熱空気と常温の外気が接触することによる結露を防止している。結露が発生すると、ワークＷに水滴が付着して乾燥塗膜の均質性が損なわれ、或いはワーク搬入路１、ワーク搬出路３の下部に水溜まりができる等の不具合を生ずるおそれがある。
塗装焼付乾燥炉Ａにおいては、過熱水蒸気補給装置７からワーク加熱炉２に過熱水蒸気が補給されるので、過熱水蒸気の一部が加熱空気に連行されることによるワーク加熱炉２内の過熱水蒸気量の減少が防止される。この結果、ワーク加熱炉２内の過熱水蒸気の量が一定値に維持され、ワーク加熱炉２の加熱能力が一定値に維持される。
塗装焼付乾燥炉Ａにおいては、ワーク搬入路１の入口１ａとワーク搬出路３の出口３ａとが、ワーク加熱炉２よりも下方に配設されているので、ワークＷが出入りしても、過熱水蒸気はワーク加熱炉２から、ひいては塗装焼付乾燥炉Ａから流出しない。 In the coating baking oven A, superheated steam having a specific heat several times larger than that of air is used as the heating gas. Therefore, when the amount of decrease in the heating gas temperature due to contact with the workpiece W is increased, heated air is used. There are few compared. As a result, the amount of heat transfer from the heated gas to the workpiece W increases as compared with the case where heated air is used, the drying time of the workpiece W is shortened, and the length of the workpiece heating furnace 2 is shortened.
In the coating baking / drying furnace A, the air at the work heating furnace 2 side end of the work carry-in path 1 and the work heating furnace 2 side end of the work carry-out path 3 is heated. 1. Occurrence of superheated steam coming into contact with normal temperature air and dew condensation at the connection portion with the work carry-out path 3 is prevented. If dew condensation occurs, water droplets may adhere to the workpiece W and the homogeneity of the dried coating film may be impaired, or there may be problems such as water pooling at the lower portion of the workpiece loading path 1 and the workpiece loading path 3.
In the paint baking and drying furnace A, the superheated steam supply device 6 is arranged to circulate and supply the superheated steam to the work heating furnace 2 to prevent the heat from being released to the outside of the paint baking and drying furnace A, and the paint baking. The thermal efficiency of the drying furnace A is increased.
In the paint baking and drying furnace A, a heated air supply device 11 is provided, and heated air is supplied to the work heating furnace 2 side end of the work carry-in path 1 and the work heating furnace 2 side end of the work carry-out path 3. By supplying, the air at the workpiece heating furnace 2 side end of the workpiece carry-in path 1 and the workpiece heating furnace 2 side end of the workpiece carry-out path 3 is reliably heated to a predetermined temperature.
In the paint baking / drying furnace A, the heated air supply device 11 includes a predetermined length region at the work heating furnace 2 side end of the work carry-in path 1 and a predetermined length of the work heating furnace 2 side end of the work carry-out path 3. The air curtain of the heated air that crosses the work carry-in path 1 and the work carry-out path 3 is formed in the work carry-in path 1 and the work carry-out path 3 over the region, so that the outside air at room temperature is superheated steam. Occurrence of a situation of touching is reliably prevented.
In the paint baking drying furnace A, the heated air supply device 11 is arranged to circulate and supply the heated air, thereby preventing the heat from being released to the outside of the paint baking drying furnace A, and the thermal efficiency of the paint baking drying furnace A. Is increasing.
In the paint baking and drying furnace A, a ventilation device 13 is provided to ventilate a part of the heated air with the outside air, thereby preventing an increase in the humidity of the heated air by entraining a part of the superheated steam and heating. Condensation due to contact between air and ambient air is prevented. If dew condensation occurs, water droplets may adhere to the workpiece W and the homogeneity of the dried coating film may be impaired, or there may be problems such as water pooling at the lower portion of the workpiece loading path 1 and the workpiece loading path 3.
In the coating baking drying furnace A, the superheated steam is replenished from the superheated steam supply device 7 to the work heating furnace 2, so that the amount of superheated steam in the work heating furnace 2 by entraining part of the superheated steam to the heated air. Is prevented from decreasing. As a result, the amount of superheated steam in the work heating furnace 2 is maintained at a constant value, and the heating capacity of the work heating furnace 2 is maintained at a constant value.
In the paint baking drying furnace A, the inlet 1a of the workpiece carry-in path 1 and the outlet 3a of the workpiece carry-out path 3 are disposed below the workpiece heating furnace 2, so that even if the workpiece W enters and exits, it is overheated. Water vapor does not flow out of the work heating furnace 2 and consequently from the paint baking drying furnace A.

図２に示すように、ワーク搬入路１とワーク搬出路３とを、直線状に形成し、ワーク加熱炉２の一端と他端とに傾斜させて接続し、塗装焼付乾燥炉Ａを山型に形成しても良い。この場合、ワークＷを台車に乗せ、台車をチェーン等で引っ張って駆動することになる。 As shown in FIG. 2, the work carry-in path 1 and the work carry-out path 3 are formed in a straight line and connected to one end and the other end of the work heating furnace 2 so as to connect the paint baking drying furnace A to the mountain shape. You may form in. In this case, the work W is placed on the carriage, and the carriage is driven by being pulled by a chain or the like.

過熱水蒸気の温度は３００℃以上でも良く、５００〜６００℃でも良い。
過熱水蒸気を循環供給するのに代えて、ワーク加熱炉２の一端から供給した過熱水蒸気をワーク加熱炉２の他端から抜き出し、抜き出した過熱水蒸気をワーク加熱炉２に還流させることなく他の目的に利用しても良い。この場合には、過熱水蒸気補給装置７は不要である。
ワーク搬入路１のワーク加熱炉２側端部とワーク搬出路３のワーク加熱炉２側端部とから抜き出した加熱空気をワーク搬入路１のワーク加熱炉２側端部とワーク搬出路３のワーク加熱炉２側端部とに還流させることなく、他の目的に利用しても良い。 The temperature of the superheated steam may be 300 ° C. or higher, and may be 500 to 600 ° C.
Instead of circulating the superheated steam, the superheated steam supplied from one end of the work heating furnace 2 is extracted from the other end of the work heating furnace 2, and the extracted superheated steam is returned to the work heating furnace 2 for other purposes. You may use it. In this case, the superheated steam supply device 7 is unnecessary.
The heated air extracted from the work heating furnace 2 side end of the work carry-in path 1 and the work heating furnace 2 side end of the work carry-out path 3 is transferred between the work heating furnace 2 side end of the work carry-in path 1 and the work carry-out path 3. You may utilize for the other objective, without making it reflux to the workpiece heating furnace 2 side edge part.

本発明は、塗装焼付乾燥炉に広く利用可能である。 The present invention is widely applicable to paint baking and drying furnaces.

本発明の第１実施例に係る塗装焼付乾燥炉の構成図である。It is a block diagram of the paint baking drying furnace which concerns on 1st Example of this invention. 本発明の第２実施例に係る塗装焼付乾燥炉のワーク搬入路とワーク加熱炉とワーク搬出路の接続状況を示す図である。It is a figure which shows the connection condition of the workpiece carry-in path of the coating baking drying furnace which concerns on 2nd Example of this invention, a workpiece | work heating furnace, and a workpiece carry-out path.

符号の説明Explanation of symbols

Ａ 塗装焼付乾燥炉
Ｗ ワーク
１ ワーク搬入路
１ａ 入口
２ ワーク加熱炉
３ ワーク搬出路
３ａ 出口
４、９、１０ ファン
５、８ ヒータ
６ 過熱水蒸気供給装置
７ 過熱水蒸気補給装置
１１ 加熱空気供給装置
１２ 熱交換器
１３ 換気装置 A Paint baking oven W Work 1 Work carry-in path 1a Inlet 2 Work heating furnace 3 Work carry-out path 3a Outlet 4, 9, 10 Fan 5, 8 Heater 6 Superheated steam supply device 7 Superheated steam supply device 11 Heated air supply device 12 Heat Exchanger 13 Ventilator

Claims (8)

直列に連結されたワーク搬入路とワーク加熱炉とワーク搬出路とを備えるトンネル型塗装焼付乾燥炉であって、ワーク加熱炉に過熱水蒸気を供給する過熱水蒸気供給手段と、ワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部の空気を加熱する空気加熱手段とを備えることを特徴とするトンネル型塗装焼付乾燥炉。 A tunnel-type paint baking drying furnace having a work carry-in path, a work heating furnace, and a work carry-out path connected in series, and superheated steam supply means for supplying superheated steam to the work heating furnace, and workpiece heating in the work carry-in path A tunnel-type paint baking and drying furnace comprising an oven-side end portion and air heating means for heating air at a workpiece heating furnace-side end portion of the workpiece carry-out path. 過熱水蒸気供給手段は過熱水蒸気を循環供給することを特徴とする請求項１に記載の塗装焼付乾燥炉。 The paint baking drying furnace according to claim 1, wherein the superheated steam supply means circulates and supplies superheated steam. 空気加熱手段はワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに加熱空気を供給する加熱空気供給手段であることを特徴とする請求項１又は２に記載の塗装焼付乾燥炉。 The air heating means is a heated air supply means for supplying heated air to a work heating furnace side end of the work carry-in path and a work heating furnace side end of the work carry-out path. Painting baking oven. 加熱空気供給手段は、ワーク搬入路のワーク加熱炉側端部の所定長さ領域と、ワーク搬出路のワーク加熱炉側端部の所定長さ領域とに亙って、ワーク搬入路とワーク搬出路とを横断する加熱空気のエアカーテンを、ワーク搬入路内とワーク搬出路内とに形成することを特徴とする３に記載の塗装焼付乾燥炉。 The heated air supply means has a predetermined length area at the workpiece heating furnace side end of the workpiece carry-in path and a predetermined length area at the workpiece heating furnace side end of the workpiece carry-out path. 4. The paint baking and drying furnace according to 3, wherein an air curtain of heated air crossing the road is formed in the work carry-in path and the work carry-out path. 加熱空気供給手段は加熱空気を循環供給することを特徴とする請求項３又は４に記載の塗装焼付乾燥炉。 The coating baking oven according to claim 3 or 4, wherein the heated air supply means circulates and supplies heated air. 加熱空気の一部を換気する換気手段を備えることを特徴とする請求項５に記載の塗装焼付乾燥炉。 6. The paint baking and drying furnace according to claim 5, further comprising ventilation means for ventilating a part of the heated air. 過熱水蒸気供給手段は過熱水蒸気を循環供給し、空気加熱手段はワーク搬入路のワーク加熱炉側端部とワーク搬出路のワーク加熱炉側端部とに加熱空気を循環供給し、更に加熱空気の一部を換気する換気手段と過熱水蒸気を補給する過熱水蒸気補給手段とを備えることを特徴とする請求項１に記載の塗装焼付乾燥炉。 The superheated steam supply means circulates and supplies superheated steam, and the air heating means circulates and supplies heated air to the work heating furnace side end of the work carry-in path and the work heating furnace side end of the work carry-out path. The paint baking and drying furnace according to claim 1, further comprising a ventilation means for partially ventilating and a superheated steam supply means for supplying superheated steam. ワーク搬入路の入口とワーク搬出路の出口とは、ワーク加熱炉よりも下方に配設されていることを特徴とする請求項１乃至６の何れか１項に記載の塗装焼付乾燥炉。 The paint baking and drying furnace according to any one of claims 1 to 6, wherein an inlet of the workpiece carry-in path and an outlet of the workpiece carry-out path are disposed below the workpiece heating furnace.
JP2006148871A 2006-05-29 2006-05-29 Oven for baking and drying coats Pending JP2007313488A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010137193A (en) * 2008-12-15 2010-06-24 Yasui Seiki:Kk Composite material sheet manufacturing machine
JP2011080658A (en) * 2009-10-06 2011-04-21 Kanto Auto Works Ltd Superheated steam drying device and manufacturing line
JP2018202290A (en) * 2017-05-31 2018-12-27 株式会社康井精機 Lamination sheet manufacturing device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010137193A (en) * 2008-12-15 2010-06-24 Yasui Seiki:Kk Composite material sheet manufacturing machine
JP2011080658A (en) * 2009-10-06 2011-04-21 Kanto Auto Works Ltd Superheated steam drying device and manufacturing line
JP2018202290A (en) * 2017-05-31 2018-12-27 株式会社康井精機 Lamination sheet manufacturing device

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