JPH04114763A - Heater for drying oven - Google Patents
Heater for drying ovenInfo
- Publication number
- JPH04114763A JPH04114763A JP23523790A JP23523790A JPH04114763A JP H04114763 A JPH04114763 A JP H04114763A JP 23523790 A JP23523790 A JP 23523790A JP 23523790 A JP23523790 A JP 23523790A JP H04114763 A JPH04114763 A JP H04114763A
- Authority
- JP
- Japan
- Prior art keywords
- drying oven
- reflection
- temperature
- reflector
- infrared
- 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
- 238000001035 drying Methods 0.000 title claims abstract description 50
- 239000002904 solvent Substances 0.000 abstract description 13
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 description 11
- 239000002184 metal Substances 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000003973 paint Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 7
- 230000007423 decrease Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Drying Of Solid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は、乾燥炉用ヒータ、さらに詳細には近赤外線
利用の乾燥炉用反射板に設けられたヒータにかかる。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a heater for a drying oven, and more particularly to a heater provided in a reflector for a drying oven that utilizes near infrared rays.
（従来の技術）
従来、各種塗料を塗布された被乾燥物等を乾燥させる乾
燥炉としては、いわゆる熱風炉、遠赤外線利用の乾燥炉
が知られている。これら乾燥路の乾燥メカニズムは以下
のように理解されている。(Prior Art) Conventionally, so-called hot air ovens and drying ovens using far infrared rays are known as drying ovens for drying objects coated with various paints. The drying mechanism of these drying paths is understood as follows.
すなわち、まず溶剤、アクリル樹脂等の樹脂からなる固
形分からなる塗料を、表面に塗布された被乾燥物を炉内
に搬入する。次いで、熱風を吹き付けあるいは遠赤外線
を照射する。すると被乾燥物に塗布された塗料表面の溶
剤がまず蒸発され、表面が流動性を失い固形化する。熱
風等の熱が内部に即ち母材側に伝播すると過熱により塗
膜の固形化が進む。すると表面より内部の溶剤は、すで
に固形化された塗膜表面を突き破って蒸発する。すると
、発泡の跡が表面に残りピンホールを生ずる。そのため
、従来の熱風炉あるいは遠赤外線利用の乾燥炉では、急
激に加熱することなく直ちに塗膜表面の溶剤が発泡し固
形化しない程度の低温を維持させるように遠赤外線を照
射し、熱風を吹き付けておこなフ。That is, first, the object to be dried, whose surface has been coated with a paint consisting of a solid component made of a solvent and a resin such as acrylic resin, is carried into a furnace. Next, hot air is blown or far infrared rays are irradiated. Then, the solvent on the surface of the paint applied to the object to be dried is first evaporated, and the surface loses fluidity and solidifies. When heat such as hot air propagates inside, that is, toward the base material, the coating film solidifies due to overheating. Then, the solvent inside the surface breaks through the already solidified coating surface and evaporates. This leaves traces of foaming on the surface and creates pinholes. For this reason, conventional hot air ovens or drying ovens that use far infrared rays irradiate far infrared rays and blow hot air to maintain a low temperature that does not cause the solvent on the coating surface to foam and solidify immediately without heating up rapidly. Tekonafu.
しかしながら、従来のこれら乾燥炉では発泡を生じない
程度の低温を維持しながら乾燥させるため乾燥に時間が
かかる課題を有した。更に遠赤外線、中赤外線ではプラ
スチック塗膜は透過しにくくまた複雑な形状からなる被
乾燥物の場合不可避的に生ずる陰部分の乾燥がしきれな
い課題を有する。However, these conventional drying ovens have a problem in that drying takes a long time because the drying is performed while maintaining a low temperature that does not cause foaming. Further, far infrared rays and mid-infrared rays do not easily pass through plastic coatings, and there is also the problem that shadow areas, which inevitably occur in the case of objects to be dried having complex shapes, cannot be completely dried.
そのため、被乾燥物の乾燥時間を短縮させるための手段
として、近赤外線利用の乾燥炉が提案されている。例え
ば「近赤外線の液体、パウダ、コーティング、ストーブ
」（実開平１−１５１８７３）、「塗料焼付炉専用の先
板」（実開平２−４３２１７） 、ＵＳＰ４，８６３，
３７５ ｒＢＡＫＩＮＧ ＭＥＴＨＯＤ ＰＯＲＵＳＥ
ＷＩＴＨＬＩＱＵＩＤ ＯＲＰＯＷＤＥＲＶＡＲＮＩ
ＳＨ［ＮＧ ＦＵＲＮＡＣＥ」（ヘーキング メソッド
フォー ユースウィズ リキッド オア パウダー
ヴアーニシング ファーニス）等である。これら従来例
には、近赤外線を使用した乾燥炉、あるいは乾燥炉内に
高温部と低温部とを順次形成して乾燥する乾燥方法、あ
るいは近赤外線ランプの背後には陶磁製反射板を設け、
および陶磁製反射板の中にはヒーターを設ける旨の記載
がある。Therefore, a drying oven using near infrared rays has been proposed as a means for shortening the drying time of the material to be dried. For example, "Near-infrared liquid, powder, coating, stove" (Utility Model Publication No. 1-151873), "Tip plate for paint baking furnace" (Utility Model Application Publication No. 2-43217), USP 4,863,
375 rBAKING METHOD PORUSE
WITHLIQUID ORPOWDER VARNI
SH[NG FURNACE” (Haking Method for Use with Liquid or Powder)
Furnishing Furnace) etc. These conventional examples include a drying oven that uses near-infrared rays, a drying method that sequentially forms a high-temperature section and a low-temperature section in the drying oven, or a method in which a ceramic reflector is installed behind the near-infrared lamp.
There is also a statement that a heater is installed in the ceramic reflector.
（発明が解決しようとする課題）
しかしながら、近赤外線利用の乾燥炉のさらなる効率化
が求められた。(Problems to be Solved by the Invention) However, there has been a demand for further improvement in the efficiency of drying ovens that utilize near-infrared rays.
（課題を解決するための手段）
この発明は、
乾燥炉内部方向に向けて設置された近赤外線ランプの側
部に設置された反射板の背面に設置され、反射板表面を
加熱し乾燥炉雰囲気温度より高温に維持することを特徴
とする乾燥炉用ヒータ、
および、
乾燥炉内部方向に向けて設置された近赤外線ランプの側
部に設置された反射板の背面に設置され、反射板表面を
加熱し乾燥炉雰囲気温度より３〜５° Ｃの範囲で高温
に維持することを特徴とする乾燥炉用ヒータ、
を提供する。(Means for Solving the Problems) This invention is installed on the back side of a reflector plate installed on the side of a near-infrared lamp installed toward the inside of a drying oven, and heats the surface of the reflector to improve the drying oven atmosphere. A heater for a drying oven that is characterized by maintaining a temperature higher than that of the drying oven; To provide a heater for a drying oven, characterized in that it heats and maintains the temperature at a high temperature in the range of 3 to 5°C above the atmospheric temperature of the drying oven.
（作用）
ヒータは、反射板を加熱し反射板表面を乾燥炉内雰囲気
温度より高温に維持する。あるいは、加熱は、反射面の
温度が乾燥炉の雰囲気より３〜５° Ｃ高く維持される
ことにより、溶剤ガスの露点以上に反射板表面は維持さ
れそのため、溶剤中のタール分等が反射面に固着するこ
とは避けられ、反射板の反射面の反射効率の低下を避け
ることが可能である。(Function) The heater heats the reflector and maintains the surface of the reflector at a higher temperature than the atmospheric temperature in the drying oven. Alternatively, heating can be done by maintaining the temperature of the reflecting surface 3 to 5°C higher than the atmosphere of the drying oven, which maintains the surface of the reflecting plate above the dew point of the solvent gas. It is possible to avoid sticking to the surface of the reflector, and it is possible to avoid a decrease in the reflection efficiency of the reflective surface of the reflector.
（実施例）
この発明の実施例の正面中央断面図をあられす第１図、
同平面図をあられす第２図、ランプまわりの斜視図をあ
られす第３図、同平面図をあられす第４図、他の実施例
の同平面図をあられす第５図、近赤外線ランプの断面図
をあられす第６図、同地の近赤外線ランプの断面図をあ
られす第７図に従って説明する。(Embodiment) FIG. 1 shows a front center sectional view of an embodiment of this invention.
Fig. 2 shows the same plan view, Fig. 3 shows the perspective view around the lamp, Fig. 4 shows the same plan view, Fig. 5 shows the same plan view of other embodiments, near-infrared lamp A cross-sectional view of the near-infrared lamp is shown in FIG. 6, and a cross-sectional view of the near-infrared lamp in the same area is shown in FIG. 7.
（１１）は乾燥炉である。乾燥炉（１１）は、搬入口（
１２）、搬出口（１３）を開口させた金属製の中空角柱
状からなる。（１４）は導入部、（１５）は有効部、（
１６）は搬出部である。搬入口（１２）、搬出口（１３
）は有効部（１５）に対して低く設は導入部（１４）、
搬出部（１６）は傾斜させて設置させる。この実施例で
は有効部（１５）の内面は、反射効率の良い表面からな
る金属板からなるが、鏡面加工を行ってもよい。（１７
）はコンベアである。コンベア（１７）は、乾燥炉（１
１）内外にわたって、搬送可能に設置する。（１８）は
、コンベア（１７）に係止される被乾燥物である。被乾
燥物（１８）は、前工程で、例えば１ｍｍの鉄板に３０
μの溶剤およびアクリル樹脂等の樹脂からなる塗料を塗
布される。(11) is a drying oven. The drying oven (11) is located at the loading entrance (
12), consists of a metal hollow prismatic shape with an opening (13). (14) is the introduction part, (15) is the effective part, (
16) is an unloading section. Loading entrance (12), loading exit (13)
) is set lower than the effective part (15), the introduction part (14),
The unloading section (16) is installed at an angle. In this embodiment, the inner surface of the effective part (15) is made of a metal plate having a surface with good reflection efficiency, but it may be mirror-finished. (17
) is a conveyor. The conveyor (17) is connected to the drying oven (1
1) Install it so that it can be transported both inside and outside. (18) is an object to be dried that is stopped by the conveyor (17). The material to be dried (18) is dried on a 1 mm iron plate in the previous process, for example.
A paint consisting of a μ solvent and a resin such as acrylic resin is applied.
（２１）は近赤外線照射装置である。近赤外線照射装置
（２１）は、この実施例では２個設置されるが、等間隔
に３以上設置させてもよい。近赤外線照射装置（２１）
は、近赤外線ランプ（２２）、ランプバンク（２３）、
反射板（２４）とを有する。近赤外線ランプ（２２）の
照射する赤外線としては、１〜ｌ、８μ、望ましくは１
〜１．５μにピークを有する近赤外線が有効である。近
赤外線ランプ（２２）は、上下に９本水平方向に設置す
るが、本数には限定はない。近赤外線ランプ（２２）の
断面は、第６図に図示されるように円形からなっても第
７図に図示されるように放物曲面からなってもよく、フ
ィラメント（２５）の背面には反射板（２６）を設置す
る。ランプバンク（２３）は、前面で近赤外線ランプ（
２２）を固定し、近赤外線ランプ（２２）側の面は鏡面
処理を施された金属あるいは反射効率の良い金属からな
る。反射板（２４）は、表面は鏡面処理をおこなうが反
射効率が良好な金属からなってもよく、先端が湾曲した
板状体からなる。反射板（２４）は更に、湾曲しない平
板状からなってもよい。（２７）は、反射板回転軸であ
る。反射板回転軸（２７）は、第４図に図示されるよう
に２枚の反射板（２４）のランプバンク（２３）側にそ
れぞれ縦方向に取り付けられても、第５図に図示される
ようにランプバンク（２３）、反射板（２４）、（２４
）を一体に形成し、ランプバンク（２３）１分の背面に
１個設置してもよい。（３１）は、反射板回転軸（２７
）の駆動用モータである。駆動用モータ（３１）は正逆
回転することで、反射板回転軸（２７）を回転させ、反
射板（２４）先端を乾燥炉（１１）中心側あるいは壁面
側へと移動させる。（３２）は、マイクロコンピュタ等
からなる制御装置であり、駆動用モータの駆動を制御す
る。（３３）は、非接触型のセンサーであり、近赤外線
照射装置（２１）のコンベア（１７）上流側に設置させ
、被乾燥物（１８）の近接を感知する。（３４）は、コ
ンベア駆動モータである。センサー（３３）、コンベア
駆動モータ（３４）はともに制御装置（３２）に接続さ
れる。近赤外線照射装置は固定としてもよい。(21) is a near-infrared irradiation device. Although two near-infrared irradiation devices (21) are installed in this embodiment, three or more near-infrared irradiation devices (21) may be installed at equal intervals. Near-infrared irradiation device (21)
are a near-infrared lamp (22), a lamp bank (23),
It has a reflecting plate (24). The infrared rays emitted by the near-infrared lamp (22) are 1 to 1, 8 μ, preferably 1
Near-infrared light having a peak at ~1.5μ is effective. Nine near-infrared lamps (22) are installed horizontally, vertically, but the number is not limited. The cross section of the near-infrared lamp (22) may be circular as shown in FIG. 6 or parabolically curved as shown in FIG. Install a reflector (26). The lamp bank (23) has near-infrared lamps (
22) is fixed, and the surface on the near-infrared lamp (22) side is made of a mirror-treated metal or a metal with good reflection efficiency. The reflecting plate (24) has a mirror-finished surface, but may be made of metal with good reflection efficiency, and is made of a plate-shaped body with a curved tip. The reflecting plate (24) may further have a flat plate shape that is not curved. (27) is the reflection plate rotation axis. Even if the reflector rotation shaft (27) is attached vertically to the lamp bank (23) side of the two reflectors (24) as illustrated in FIG. Lamp bank (23), reflector (24), (24)
) may be integrally formed and one piece may be installed on the back side of the lamp bank (23). (31) is the reflector rotation axis (27
) drive motor. The drive motor (31) rotates in forward and reverse directions to rotate the reflection plate rotation shaft (27) and move the tip of the reflection plate (24) toward the center or wall of the drying oven (11). (32) is a control device consisting of a microcomputer or the like, and controls the drive of the drive motor. (33) is a non-contact type sensor, which is installed upstream of the conveyor (17) of the near-infrared irradiation device (21) to sense the proximity of the material to be dried (18). (34) is a conveyor drive motor. Both the sensor (33) and the conveyor drive motor (34) are connected to the control device (32). The near-infrared irradiation device may be fixed.
第９図に図示される実施例では、反射板（２４）は被乾
燥物（１８）の移動を追跡することなく、反射回転軸（
２７）を回転中心として反射板（２４）を回転し、あら
かじめ集光方向を設定する。In the embodiment illustrated in FIG.
The reflection plate (24) is rotated about 27) as the center of rotation, and the light collection direction is set in advance.
（４１）は、ヒータである。ヒータ（４１）は、電熱ヒ
ータからなり反射板（２４）の背面に設置される。(41) is a heater. The heater (41) is an electric heater and is installed on the back surface of the reflector (24).
ヒータ（４１）は、反射板（２４）を加熱し反射板（２
４）表面を乾燥炉（１１）雰囲気温度より高温に維持す
る。加熱は、反射面の温度が乾燥炉（１１）雰囲気の温
度より３〜５℃の範囲で高温であればよく、５° Ｃ以
上の高温は必ずしも必要ではない。The heater (41) heats the reflector (24) and
4) Maintain the surface at a higher temperature than the ambient temperature of the drying oven (11). The heating may be performed as long as the temperature of the reflective surface is 3 to 5°C higher than the temperature of the atmosphere of the drying oven (11), and a high temperature of 5°C or higher is not necessarily required.
次に、実施例の作用について説明する。被乾燥物（１８
）は、前工程で溶剤およびアクリル樹脂等の樹脂からな
る塗料を塗布され、コンベア（１７）に係止される。コ
ンベア（１７）は、コンベア駆動モータ（３４）により
駆動される。被乾燥物（１８）は、コンベア（１７）に
搬送され、搬入口（１２）から乾燥炉（１１）内に入り
、有効部（１５）に至る。すると、第４図、第５図−に
図示される実施例では、被乾燥物（１８）の近接はセン
サー（３３）で感知される。Next, the operation of the embodiment will be explained. Materials to be dried (18
) is coated with a paint consisting of a solvent and a resin such as acrylic resin in a previous step, and is secured to a conveyor (17). The conveyor (17) is driven by a conveyor drive motor (34). The material to be dried (18) is conveyed to the conveyor (17), enters the drying oven (11) through the inlet (12), and reaches the effective section (15). Then, in the embodiment illustrated in FIGS. 4 and 5, the proximity of the object to be dried (18) is sensed by the sensor (33).
センサー（３３）が感知すると、信号を制御装置（３２
）に伝送する。制御装置（３２）は、駆動用モータ（３
１）を駆動させ各反射板（２５）を、ａ側に回転させる
。制御装置（３２）は、コンベア駆動用モータ（３４）
にも接続しており、コンベアの駆動速度信号も伝送され
る。制御装置（３２）は、入力されるコンベアの駆動速
度信号によりコンベアの駆動速度に同期させて反射板（
２５）を、ｂ方向部ち被乾燥物（１８）の移動方向に、
移動速度にあわせて移動させる。下流側のセンサー（３
３）順次感知するにしたがい、その下流側の近赤外線照
射装置（２１）が同様に順次作動される。被乾燥物（１
８）が、近赤外線照射装置の照射範囲外にいたると、例
えばセンサー（３３）での感知後一定時間経過後、制御
装置（３２）により駆動用モータ（３１）は駆動され反
射板回転軸（２７）を再度正面に向かせる。When the sensor (33) senses, the signal is sent to the control device (32).
). The control device (32) includes a drive motor (3
1) to rotate each reflecting plate (25) toward the a side. The control device (32) is a conveyor drive motor (34)
The conveyor drive speed signal is also transmitted. The control device (32) controls the reflection plate (32) in synchronization with the drive speed of the conveyor based on the input conveyor drive speed signal.
25) in the direction of movement of the material to be dried (18) in the b direction,
Move according to the movement speed. Downstream sensor (3
3) As the detection is sequentially performed, the downstream near-infrared irradiation device (21) is sequentially activated in the same way. Material to be dried (1
8) is outside the irradiation range of the near-infrared irradiation device, for example, after a certain period of time has elapsed after detection by the sensor (33), the drive motor (31) is driven by the control device (32) and the reflector rotation shaft ( 27) to face the front again.
反射板（２５）による、近赤外線ランプ（２２）の反射
は、近赤外線ランプ（２２）の近赤外線ランプ（２２）
前通過時の被乾燥物（１８）に対するエネルギー密度が
上昇し、被乾燥物（１８）の物体表面温度が上昇する。The reflection of the near-infrared lamp (22) by the reflector plate (25) is the near-infrared lamp (22) of the near-infrared lamp (22).
The energy density for the object to be dried (18) during the previous passage increases, and the surface temperature of the object to be dried (18) increases.
さらに、反射板（２５）は被乾燥物（１８）の搬送速度
に同期されて移動するため、近赤外線ランプ（２２）の
照射時間が延長される。Furthermore, since the reflecting plate (25) moves in synchronization with the transport speed of the material to be dried (18), the irradiation time of the near-infrared lamp (22) is extended.
第９図に図示される実施例においては、あらかじめ設定
された反射板（２４）の位置により集光方向が定められ
、集光方向ではより高温となる。In the embodiment shown in FIG. 9, the light collection direction is determined by the preset position of the reflection plate (24), and the temperature is higher in the light collection direction.
そのため炉内で高温低温の差を反射板なしの場合に比し
高めることが可能となる。Therefore, it is possible to increase the difference between high and low temperatures in the furnace compared to the case without a reflector.
近赤外線を、被乾燥物に照射すると、大部分の近赤外線
は塗膜を透過し、金属板の表面から１〜２ｎｍの位置で
吸収され金属表面の温度が上昇し、塗膜を内部から加熱
させ金属表面付近から硬化が始まる。そのため、塗膜表
面の流動性が低下する以前に急激な加熱がされ、溶剤は
飛ばされ塗膜表面の流動性喪失後の溶剤発泡、ピンホー
ルは生じない。そのため、短時間によるキユアリングが
可能となり、乾燥炉自体も小型化が可能となる。When the material to be dried is irradiated with near-infrared rays, most of the near-infrared rays pass through the paint film and are absorbed at a position 1 to 2 nm from the surface of the metal plate, increasing the temperature of the metal surface and heating the paint film from within. Hardening begins near the metal surface. Therefore, rapid heating is performed before the fluidity of the coating surface decreases, and the solvent is blown away, so that no solvent foaming or pinholes occur after the coating surface loses fluidity. Therefore, curing can be performed in a short time, and the drying oven itself can be downsized.
ヒータ（４１）は、反射板（２４）を加熱し反射板（２
４）表面を乾燥炉（１１）雰囲気温度より高温に維持す
る。加熱は、反射面の温度が乾燥炉（１１）の雰囲気上
りが３〜５℃高く維持されることにより、溶剤ガスの露
点以上に反射板（２５）表面は維持されそのため、溶剤
中のタール分等が反射面に固着することは避けられ、反
射板（２４）の反射面の反射効率の低下を避けることが
可能である。The heater (41) heats the reflector (24) and
4) Maintain the surface at a higher temperature than the ambient temperature of the drying oven (11). During heating, the temperature of the reflecting plate (25) is maintained at a temperature higher than the dew point of the solvent gas by maintaining the temperature of the reflecting surface 3 to 5 degrees Celsius higher than the temperature of the atmosphere in the drying oven (11). etc. can be prevented from sticking to the reflective surface, and it is possible to avoid a decrease in the reflection efficiency of the reflective surface of the reflective plate (24).
（実施例１）
第１図、第２図に図示されるような形状からなる乾燥炉
を使用し、近赤外線照射装置は固定し、反射板の有無に
よる被乾燥物表面の温度変化を測定した。(Example 1) A drying oven having the shape shown in Figures 1 and 2 was used, the near-infrared irradiation device was fixed, and the temperature change on the surface of the dried object was measured depending on the presence or absence of a reflector. .
有効部（１５） ５．０００ｍｍ
有効部通過時間 １０分近赤外線照
射装置 ２基近赤外線照射装置間隔
２，８００ｍｍ有効部端部から近赤外線照射
装置中心までの距離
１，６００ｍｍ鉄板厚（ボンデ鋼板）
２ｍｍ雰囲気温度
１６０″Ｃ反射板を設置した場合１と、しない場合す
とを第８図に図示する。Ｃは反射板取り付は部、■は導
入部、■は有効部である。Effective part (15) 5.000mm
Effective section passage time: 10 minutes Near-infrared irradiation device 2 units Near-infrared irradiation device spacing 2,800 mm Distance from the end of the effective section to the center of the near-infrared irradiation device
1,600mm steel plate thickness (bonde steel plate)
2mm ambient temperature
Fig. 8 shows a case 1 with a 160''C reflector installed and a case 1 without. C is the part where the reflector is attached, ■ is the introduction part, and ■ is the effective part.
反射板を取り付けた場合は、赤外線のエネルギー密度が
ランプ前に集中し、炉端部のエネルギー密度は少なくな
るため初期温度は反射板を取り付けた場合よりも反射板
なしの場合の方が高いにもかかわらず、上昇点が遅く、
有効部入口より約４分の地点で表面温度は逆転する。ラ
ンプバンク付近になると、反射板有りの方が温度上昇勾
配が大きくなり、ランプバンク前面で反射板なしの温度
曲線と交差し、以後反射板有りの場合の方の表面温度の
方が高くなる。このことは、ランプ前で被乾燥物が急激
に照射され温度上昇をすることを示しており、塗膜の温
度を急上昇させ、溶剤の蒸発の進行とともに樹脂の架橋
反応を促進し、架橋度の増大を図ることが可能となる。When a reflector is attached, the energy density of infrared rays is concentrated in front of the lamp, and the energy density at the hearth end is reduced, so the initial temperature may be higher without a reflector than with a reflector attached. Regardless, the rising point is slow,
The surface temperature reverses at a point about 4 minutes from the effective part entrance. Near the lamp bank, the temperature rise gradient becomes larger with the reflector, intersects the temperature curve without the reflector at the front of the lamp bank, and thereafter the surface temperature with the reflector becomes higher. This indicates that the material to be dried is rapidly irradiated in front of the lamp and its temperature rises, causing a rapid rise in the temperature of the coating film, promoting the crosslinking reaction of the resin as the solvent evaporates, and reducing the degree of crosslinking. It becomes possible to increase the number of people.
（発明の効果）
したがってこの発明では、反射板の反射面の反射効率の
低下を避けることが可能である。(Effects of the Invention) Therefore, according to the present invention, it is possible to avoid a decrease in the reflection efficiency of the reflection surface of the reflection plate.
第１図は、この発明の実施例の正面中央断面図、第２図
は同平面図、第３図はランプまわりの斜視図、第４図は
同平面図、第５図は他の実施例の同平面図、第６図は近
赤外線ランプの断面図、第７図は同地の近赤外線ランプ
の断面図、第８図は実施例の温度変化図、第９図は更に
他の実施例の平面図である。
（１１）・・・乾燥炉、（２１）・・・近赤外線照射装
置、（２２）・・・近赤外線ランプ、（２４）・・・乾
燥炉用反射板、（４１）・・乾燥炉用ヒータ。FIG. 1 is a front center sectional view of an embodiment of the invention, FIG. 2 is a plan view of the same, FIG. 3 is a perspective view of the area around the lamp, FIG. 4 is a plan view of the same, and FIG. 5 is another embodiment. 6 is a sectional view of the near-infrared lamp, FIG. 7 is a sectional view of the near-infrared lamp, FIG. 8 is a temperature change diagram of the example, and FIG. 9 is a further example of another example. FIG. (11)...Drying oven, (21)...Near infrared irradiation device, (22)...Near infrared lamp, (24)...Reflector plate for drying oven, (41)...For drying oven heater.
Claims (2)
プの側部に設置された反射板の背面に設置され、反射板
表面を加熱し乾燥炉雰囲気温度より高温に維持すること
を特徴とする乾燥炉用ヒータ。(1) It is installed on the back of a reflector installed on the side of a near-infrared lamp installed toward the inside of the drying oven, and heats the surface of the reflector to maintain it at a higher temperature than the atmospheric temperature of the drying oven. Heater for drying oven.
プの側部に設置された反射板の背面に設置され、反射板
表面を加熱し乾燥炉雰囲気温度より３〜５℃の範囲で高
温に維持することを特徴とする乾燥炉用ヒータ。(2) It is installed on the back of the reflector plate installed on the side of the near-infrared lamp installed toward the inside of the drying oven, and heats the surface of the reflector to a temperature within the range of 3 to 5 degrees Celsius above the atmospheric temperature of the drying oven. A heater for a drying oven characterized by maintaining
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235237A JPH0694019B2 (en) | 1990-09-05 | 1990-09-05 | Heater for drying oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2235237A JPH0694019B2 (en) | 1990-09-05 | 1990-09-05 | Heater for drying oven |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04114763A true JPH04114763A (en) | 1992-04-15 |
| JPH0694019B2 JPH0694019B2 (en) | 1994-11-24 |
Family
ID=16983111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2235237A Expired - Lifetime JPH0694019B2 (en) | 1990-09-05 | 1990-09-05 | Heater for drying oven |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0694019B2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161066U (en) * | 1984-09-26 | 1986-04-24 | ||
| JPS63310669A (en) * | 1987-06-11 | 1988-12-19 | Taikisha Ltd | Baking equipment for painting |
| JPH01151873U (en) * | 1988-04-14 | 1989-10-19 |
-
1990
- 1990-09-05 JP JP2235237A patent/JPH0694019B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6161066U (en) * | 1984-09-26 | 1986-04-24 | ||
| JPS63310669A (en) * | 1987-06-11 | 1988-12-19 | Taikisha Ltd | Baking equipment for painting |
| JPH01151873U (en) * | 1988-04-14 | 1989-10-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0694019B2 (en) | 1994-11-24 |
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