JPH11192545A - Reflow device - Google Patents
Reflow deviceInfo
- Publication number
- JPH11192545A JPH11192545A JP68598A JP68598A JPH11192545A JP H11192545 A JPH11192545 A JP H11192545A JP 68598 A JP68598 A JP 68598A JP 68598 A JP68598 A JP 68598A JP H11192545 A JPH11192545 A JP H11192545A
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- JP
- Japan
- Prior art keywords
- work
- heating
- heater
- hot air
- furnace
- 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.)
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- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、はんだ付け用のリ
フロー装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflow apparatus for soldering.
【０００２】[0002]
【従来の技術】図５および図６に示されるように、従来
のリフロー装置は、第１プリヒート炉11、第２プリヒー
ト炉12、第３プリヒート炉13およびリフロー炉14の各々
の炉体15内に、外部のモータ16により回転伝達機構17を
介して駆動される送風機（シロッコファン）18と、この
送風機18により生じた風を炉体15内で循環させる案内板
19とが配置され、炉体15内の上部から下方へ向かう風路
中に、触媒21、加熱ヒータ22、整流板23、防風板24およ
びサブヒータ25が順次配設され、サブヒータ25の下側に
ワーク搬送用のチェンコンベヤ26が配設されている。2. Description of the Related Art As shown in FIGS. 5 and 6, a conventional reflow apparatus comprises a first preheat furnace 11, a second preheat furnace 12, a third preheat furnace 13, and a reflow furnace 14 each having a furnace body 15. A blower (sirocco fan) 18 driven by an external motor 16 via a rotation transmission mechanism 17 and a guide plate for circulating the wind generated by the blower 18 in the furnace body 15
And a catalyst 21, a heater 22, a rectifying plate 23, a windbreak plate 24, and a sub-heater 25 are sequentially disposed in an air passage going downward from an upper portion in the furnace body 15, and are disposed below the sub-heater 25. A chain conveyor 26 for transporting the work is provided.
【０００３】送風機18、案内板19、加熱ヒータ22および
整流板23は、送風機18および加熱ヒータ22にて生じた熱
風により炉体15内のワーク（部品実装基板）Ｗを加熱す
る熱風加熱手段を形成している。触媒21は、ワークＷか
ら発生したガスなどを浄化処理し、整流板23は、熱風の
流速および方向性をワーク全面にわたって整える働きが
ある。The blower 18, the guide plate 19, the heater 22, and the rectifying plate 23 form a hot air heating means for heating a work (component mounting board) W in the furnace body 15 by hot air generated by the blower 18 and the heater 22. Has formed. The catalyst 21 purifies gas and the like generated from the work W, and the rectifying plate 23 functions to adjust the flow velocity and directionality of the hot air over the entire work.
【０００４】一方、防風板24およびサブヒータ25は、遠
赤外線加熱手段を形成し、図６に示されるように下面を
開口した複数の防風板24が通風間隙27を介して配列され
ており、第１プリヒート炉11およびリフロー炉14では、
これらの防風板24の内部にサブヒータ25が配置され、防
風板24によりサブヒータ25に熱風が当らないようにしな
がら、サブヒータ25の表面から放射された遠赤外線を防
風板24の下面開口28を経てワークＷの上面に照射し加熱
する。なお、第２プリヒート炉12および第３プリヒート
炉13では、サブヒータ25を設ける必要がない。On the other hand, the windshield 24 and the sub-heater 25 form a far-infrared heating means, and a plurality of windshields 24 each having an open lower surface are arranged through a ventilation gap 27 as shown in FIG. In 1 preheat furnace 11 and reflow furnace 14,
The sub-heater 25 is disposed inside the wind-shield plate 24, and the far-infrared radiation radiated from the surface of the sub-heater 25 passes through the lower opening 28 of the wind-shield plate 24 while preventing the hot air from hitting the sub-heater 25 by the wind shield 24. The upper surface of W is irradiated and heated. In the second preheating furnace 12 and the third preheating furnace 13, there is no need to provide the sub-heater 25.
【０００５】[0005]
【発明が解決しようとする課題】この従来の装置におい
ては、熱風加熱と遠赤外線加熱とのバランスを保って、
適切なワーク温度プロファイルを得ることが困難であ
る。In this conventional apparatus, the balance between hot air heating and far infrared heating is maintained.
It is difficult to obtain an appropriate work temperature profile.
【０００６】すなわち、加熱ヒータ22による熱風加熱を
強くすると、図７に示されるようにワークＷの温度上昇
が階段形になりやすく、円滑なワーク温度プロファイル
曲線が得られない。That is, when the hot air heating by the heater 22 is intensified, the temperature rise of the work W tends to be stepwise as shown in FIG. 7, and a smooth work temperature profile curve cannot be obtained.
【０００７】一方、サブヒータ25による遠赤外線加熱を
強くすると、連続してワークＷが搬送されたときに温度
の振れが生じやすく、持続して同じワーク温度が得られ
にくい問題がある。On the other hand, when the far-infrared heating by the sub-heater 25 is intensified, the temperature of the workpiece W tends to fluctuate when the workpiece W is continuously transported, and it is difficult to obtain the same workpiece temperature continuously.
【０００８】本発明は、このような点に鑑みなされたも
ので、熱風加熱と遠赤外線加熱とにより適切なワーク温
度プロファイルを得ることが可能なリフロー装置を提供
することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has as its object to provide a reflow apparatus capable of obtaining an appropriate work temperature profile by hot air heating and far infrared heating. .
【０００９】[0009]
【課題を解決するための手段】請求項１に記載された発
明は、ワークの供給を受ける炉体と、炉体内のワークを
熱風により加熱する熱風加熱手段と、平板状に形成され
たヒータ本体の全面にわたり均一分布の複数の通風穴が
穿設され通電発熱により放射された遠赤外線により炉体
内のワークを加熱する面状ヒータとを具備したリフロー
装置である。According to a first aspect of the present invention, there is provided a furnace body for receiving a workpiece, hot air heating means for heating the workpiece in the furnace with hot air, and a heater body formed in a flat plate shape. A plurality of ventilation holes having a uniform distribution over the entire surface, and a planar heater for heating a workpiece in the furnace by far infrared rays radiated by energized heat generation.
【００１０】そして、遠赤外線を放射する面状ヒータの
全面にわたって均一分布の通風穴を穿設し、その通風穴
に熱風を通すことにより、熱風加熱を強くしても階段形
のワーク温度上昇にならず、また遠赤外線加熱を強くし
ても、面状ヒータ自体の熱容量が大きくかつ均一である
から、ワーク温度の安定性が得られる。[0010] Then, ventilation holes having a uniform distribution are formed over the entire surface of the planar heater that radiates far-infrared rays, and hot air is passed through the ventilation holes. In addition, even if the far-infrared heating is intensified, the heat capacity of the planar heater itself is large and uniform, so that the work temperature stability can be obtained.
【００１１】請求項２に記載された発明は、請求項１記
載のリフロー装置において、熱風加熱手段および面状ヒ
ータが、ワークの上面および下面に対し配設されたもの
である。According to a second aspect of the present invention, in the reflow apparatus according to the first aspect, the hot air heating means and the planar heater are disposed on the upper and lower surfaces of the work.
【００１２】そして、ワークの上面だけでなくワークの
下面をも、熱風加熱手段および面状ヒータで加熱するこ
とにより、プリヒート加熱の初期などにおけるワーク温
度の立上り制御を効果的に行える。By heating not only the upper surface of the work but also the lower surface of the work with the hot air heating means and the planar heater, it is possible to effectively control the rise of the work temperature at the beginning of preheating heating.
【００１３】請求項３に記載された発明は、請求項２記
載のリフロー装置において、ワークの下面に対する面状
ヒータは、ワークが両面実装基板の場合はリフロー加熱
時に通電を停止して、通風穴を経た風のみを両面実装基
板の下面に供給するものである。According to a third aspect of the present invention, in the reflow apparatus according to the second aspect, the planar heater for the lower surface of the work stops energizing at the time of reflow heating when the work is a double-sided mounting board, and the ventilation hole Is supplied to the lower surface of the double-sided mounting board.
【００１４】そして、ワークが両面実装基板の場合は、
リフロー加熱時にワークの下面側と対向する面状ヒータ
に通電せず、この面状ヒータの通風穴を通過した風によ
りワークの下面側を冷却し、予めワークの下面側にはん
だ付けされた部品をリフロー加熱しないようにする。When the workpiece is a double-sided mounting board,
During reflow heating, the surface heater facing the lower surface of the work is not energized, and the lower surface of the work is cooled by the wind passing through the ventilation holes of the surface heater, and the parts soldered to the lower surface of the work in advance are cooled. Avoid reflow heating.
【００１５】[0015]
【発明の実施の形態】以下、本発明を図１乃至図３に示
された実施の一形態、図４に示された実施の他の形態を
参照しながら説明する。なお、図５乃至図７に示された
従来例と同様の部分には同一符号を付する。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to one embodiment shown in FIGS. 1 to 3 and another embodiment shown in FIG. The same parts as those in the conventional example shown in FIGS. 5 to 7 are denoted by the same reference numerals.
【００１６】図２に示されるように、ワーク搬送方向
に、第１プリヒート炉11、第２プリヒート炉12、第３プ
リヒート炉13およびリフロー炉14が順次配置されてい
る。As shown in FIG. 2, a first preheating furnace 11, a second preheating furnace 12, a third preheating furnace 13, and a reflow furnace 14 are sequentially arranged in the work transfer direction.
【００１７】第１プリヒート炉11およびリフロー炉14で
は、これらの炉体15内に、図１に示されるように、外部
のモータ16により回転伝達機構17を介して駆動される送
風機（シロッコファン）18と、この送風機18により生じ
た風を炉体15内で循環させる上下の案内板19，20とが配
置されている。In the first preheat furnace 11 and the reflow furnace 14, as shown in FIG. 1, a blower (sirocco fan) driven by an external motor 16 via a rotation transmission mechanism 17 in the furnace body 15 18 and upper and lower guide plates 19 and 20 for circulating the wind generated by the blower 18 in the furnace body 15 are arranged.
【００１８】送風機18は、フレーム31上に立設された一
対の取付板32を介し取付けられた左右両側の軸受33によ
り、炉体15の下部に挿入された回転軸34が回転自在に支
持され、この回転軸34の一端に対しプーリおよび無端ベ
ルト、またはスプロケットおよび無端チェンで構成され
る回転伝達機構17が接続されている。In the blower 18, a rotating shaft 34 inserted into a lower portion of the furnace body 15 is rotatably supported by left and right bearings 33 mounted via a pair of mounting plates 32 erected on a frame 31. The rotation transmitting mechanism 17 including a pulley and an endless belt or a sprocket and an endless chain is connected to one end of the rotating shaft.
【００１９】上側に位置する案内板19は、送風機18から
上方へ吹出される風を炉体15の左右両側壁に沿って炉体
上部の中央部へ案内するものであり、また下側に位置す
る案内板20は、送風機18から下方へ吹出される風を炉体
下部の中央部へ案内するものである。The guide plate 19 located on the upper side guides the wind blown upward from the blower 18 to the center of the upper part of the furnace body along the right and left side walls of the furnace body 15, and is located on the lower side. The guide plate 20 guides the wind blown downward from the blower 18 to the central portion of the lower part of the furnace body.
【００２０】炉体15内の上部から下方へ向かう風路中に
は、触媒21、加熱ヒータ（シーズヒータ）22、整流板23
および遠赤外線加熱用の面状ヒータ37が順次配設され、
この面状ヒータ37の下側にワーク搬送用のチェンコンベ
ヤ26が配設されている。加熱ヒータ22の上側および整流
板23の下側には温度検出用の熱電対38がそれぞれ配設さ
れている。A catalyst 21, a heater (seed heater) 22, a rectifying plate 23
And a planar heater 37 for far-infrared heating are sequentially arranged,
A chain conveyor 26 for transporting a work is provided below the planar heater 37. Above the heater 22 and below the current plate 23, thermocouples 38 for temperature detection are provided, respectively.
【００２１】送風機18、ワーク上側の案内板19、加熱ヒ
ータ22および整流板23は、送風機18および加熱ヒータ22
にて生じた熱風により炉体15内のワーク（部品実装基
板）Ｗを上側から加熱する上側の熱風加熱手段40a を形
成している。The blower 18, the guide plate 19 on the upper side of the work, the heater 22 and the rectifying plate 23
An upper hot air heating means 40a for heating the work (component mounting board) W in the furnace body 15 from the upper side by the hot air generated in the above is formed.
【００２２】また、ワーク下側の案内板20の間には、遠
赤外線加熱用の面状ヒータ39が設けられている。一方、
送風機18および下側の案内板20は、上側の加熱ヒータ22
にて温度制御された熱風を、炉体15内のワーク（部品実
装基板）Ｗの下面に吹付けて加熱する下側の熱風加熱手
段40b を形成している。なお、図２に示されるように、
下側の面状ヒータ39は、第１プリヒート炉11およびリフ
ロー炉14に設けられ、第２プリヒート炉12および第３プ
リヒート炉13には設けられていない。A planar heater 39 for heating far infrared rays is provided between the guide plates 20 on the lower side of the work. on the other hand,
The blower 18 and the lower guide plate 20 are connected to the upper heater 22.
A lower hot air heating means 40b is formed to blow hot air whose temperature is controlled by the above to the lower surface of the work (component mounting substrate) W in the furnace body 15 to heat it. In addition, as shown in FIG.
The lower planar heater 39 is provided in the first preheat furnace 11 and the reflow furnace 14, but is not provided in the second preheat furnace 12 and the third preheat furnace 13.
【００２３】図３に示されるように、遠赤外線加熱用の
面状ヒータ37および面状ヒータ39は、平板状のヒータ本
体41の内部にシーズヒータなどの通電により発熱する発
熱体42が配設され、また、ヒータ本体41の全面にわたっ
て、発熱体42のない位置に多数の通風穴43が均等分布で
穿設されている。As shown in FIG. 3, the planar heater 37 and the planar heater 39 for heating far-infrared rays are provided with a heating element 42 that generates heat by energizing a sheathed heater or the like inside a flat heater body 41. In addition, a large number of ventilation holes 43 are formed in a position without the heating element 42 in an even distribution over the entire surface of the heater main body 41.
【００２４】ヒータ本体41は、発熱体42と接触して高温
に加熱される鉄板などの発熱面板44と、発熱体42と接触
しない押え板45とにより形成されている。発熱面板44の
ワーク側面は、遠赤外線を放射する発熱面44a となって
いる。The heater main body 41 is formed by a heat generating face plate 44 such as an iron plate which is heated to a high temperature in contact with the heat generating element 42 and a pressing plate 45 not in contact with the heat generating element 42. The work side surface of the heating surface plate 44 is a heating surface 44a that emits far-infrared rays.
【００２５】ヒータ本体41の内部、すなわち発熱面板44
と押え板45との間には断熱材46が充填されている。この
断熱材46は、発熱体42と押え板45との間にも介在されて
いる。The inside of the heater body 41, that is, the heat generating face plate 44
A heat insulating material 46 is filled between the pressure plate 45 and the pressing plate 45. The heat insulating material 46 is also interposed between the heating element 42 and the holding plate 45.
【００２６】ヒータ本体41には、円筒カラー状に成形さ
れた断熱材47が嵌着されており、この断熱材47の内部に
前記通風穴43が形成され、この断熱材47により発熱体42
と通風穴43とが熱的に遮断されている。A heat insulating material 47 shaped like a cylindrical collar is fitted into the heater main body 41, and the ventilation hole 43 is formed inside the heat insulating material 47, and the heat generating element 42 is formed by the heat insulating material 47.
And the ventilation hole 43 are thermally isolated.
【００２７】一方、第２プリヒート炉12および第３プリ
ヒート炉13は、ワーク上面加熱用の熱風加熱手段40a お
よび面状ヒータ37のみが設けられ、ワークＷより下側の
炉内構造は、図５に示された従来のものと同様である。On the other hand, the second preheating furnace 12 and the third preheating furnace 13 are provided with only the hot air heating means 40a for heating the upper surface of the work and the planar heater 37, and the inner structure of the furnace below the work W is shown in FIG. Is the same as the conventional one shown in FIG.
【００２８】次に、図１乃至図３に示された実施形態の
作用を説明する。Next, the operation of the embodiment shown in FIGS. 1 to 3 will be described.
【００２９】第１プリヒート炉11およびリフロー炉14で
は、ワーク上下の熱風加熱手段40a，40b より供給され
た熱風ａによる加熱と、ワーク上下の面状ヒータ37，39
の発熱体42により加熱された発熱面板44の発熱面44a か
ら放射された遠赤外線ｂによる加熱とを、ワーク（部品
実装基板）Ｗに対して併用する。In the first preheat furnace 11 and the reflow furnace 14, heating by the hot air a supplied from the hot air heating means 40a, 40b above and below the work, and the planar heaters 37, 39 above and below the work.
Heating by the far infrared rays b radiated from the heat generating surface 44a of the heat generating surface plate 44 heated by the heat generating element 42 is used for the work (component mounting board) W together.
【００３０】第２プリヒート炉12および第３プリヒート
炉13では、ワーク上面に対する熱風加熱手段40a より供
給された熱風ａによる加熱と、ワーク上側の面状ヒータ
37から放射された遠赤外線ｂによる加熱とを、ワーク
（部品実装基板）Ｗに対して併用する。In the second preheating furnace 12 and the third preheating furnace 13, the upper surface of the work is heated by the hot air a supplied from the hot air heating means 40a, and the upper surface of the work is heated by the planar heater.
The heating by the far-infrared ray b radiated from 37 is used together with the work (component mounting board) W.
【００３１】第１プリヒート炉11およびリフロー炉14に
て、ワーク上面に対する熱風加熱手段40a の加熱ヒータ
22および面状ヒータ37と、ワーク下面に対する面状ヒー
タ39は、それぞれ独立して温度制御するが、ワーク下面
に対する熱風加熱手段40b の温度は、ワーク上面に対す
る熱風加熱手段40a の加熱ヒータ22に依存する。In the first preheat furnace 11 and the reflow furnace 14, the heater of the hot air heating means 40a for the upper surface of the work is used.
The temperature of the hot air heating means 40b for the work lower surface depends on the heater 22 of the hot air heating means 40a for the work upper surface. I do.
【００３２】この下面側の熱風加熱手段40b による循環
熱風は、面状ヒータ39の中心部の温度上昇を防ぐ働きが
ある。The circulating hot air generated by the hot air heating means 40b on the lower surface side has a function of preventing the temperature of the central portion of the planar heater 39 from rising.
【００３３】この併用加熱の場合、通風穴43により熱風
ａを透過させることにより、面状ヒータ37，39が熱風ａ
の障害物となることを防ぎ、熱風ａの円滑な流れを確保
し、ワークＷを均一に加熱する。In the case of this combined heating, the hot air a is transmitted through the ventilation hole 43 so that the planar heaters 37 and 39 are heated by the hot air a.
, And a smooth flow of the hot air a is secured, and the work W is uniformly heated.
【００３４】さらに、発熱体42と通風穴43を透過する熱
風ａとの相互熱干渉を、ヒータ本体41内の断熱材46およ
び円筒状の断熱材47により防止する。Further, mutual thermal interference between the heating element 42 and the hot air a passing through the ventilation hole 43 is prevented by the heat insulating material 46 and the cylindrical heat insulating material 47 in the heater main body 41.
【００３５】すなわち、発熱体42から生じた熱は、この
発熱体42と接触する発熱面板44のみに伝わり、熱風ａが
衝突する押え板45および熱風ａが透過する通風穴43内に
は伝わらないので、熱風ａの温度が発熱体42から生じた
熱で上昇することを防止できるとともに、熱風ａにより
発熱面板44の表面温度が降下することを防止できる。That is, the heat generated from the heating element 42 is transmitted only to the heating face plate 44 in contact with the heating element 42, and is not transmitted to the presser plate 45 against which the hot air a collides and the inside of the ventilation hole 43 through which the hot air a is transmitted. Therefore, it is possible to prevent the temperature of the hot air a from rising due to the heat generated from the heating element 42 and also prevent the surface temperature of the heat generating face plate 44 from being lowered by the hot air a.
【００３６】また、ワークＷの種類に応じて、遠赤外線
ｂによる加熱と、熱風ａによる加熱とを容易に調整でき
る。例えば、ワークとしてのプリント配線基板にソルダ
ペーストを介して搭載された集積回路などの実装部品の
材質または色による遠赤外線ｂの吸収率や、熱風ａを受
ける形状などに応じて、遠赤外線加熱と熱風加熱とのバ
ランスを容易に調整できる。Further, the heating by the far infrared rays b and the heating by the hot air a can be easily adjusted according to the type of the work W. For example, the far-infrared heating and the absorption of the far-infrared b depending on the material or color of the mounted component such as an integrated circuit mounted on the printed wiring board as a work via the solder paste, or the shape receiving the hot air a, etc. Balance with hot air heating can be easily adjusted.
【００３７】このように、遠赤外線ｂを発する面状ヒー
タ37，39の全面にわたって均一分布の通風穴43を穿設
し、その通風穴43に熱風ａを通すことにより、熱風加熱
を強くしても階段形のワーク温度上昇にならず、また遠
赤外線加熱を強くしても、面状ヒータ37，39自体の熱容
量が大きくかつ均一であるから、ワークＷが連続的に搬
送される場合でも、ワーク温度の安定性が得られる。As described above, the ventilation holes 43 having a uniform distribution are formed over the entire surface of the planar heaters 37 and 39 which emit the far infrared rays b, and the hot air a is passed through the ventilation holes 43 to enhance the hot air heating. Even if the temperature of the work W is not conveyed continuously, and even if the far-infrared heating is intensified, the heat capacity of the planar heaters 37 and 39 themselves is large and uniform, Work temperature stability is obtained.
【００３８】さらに、第１プリヒート炉11にて、ワーク
Ｗの上面だけでなくワークＷの下面をも、熱風加熱手段
40b および面状ヒータ39で加熱することにより、ワーク
温度の立上り制御を効果的に行える。Furthermore, in the first preheating furnace 11, not only the upper surface of the work W but also the lower surface of the work W
By heating with the 40b and the planar heater 39, the rise control of the work temperature can be effectively performed.
【００３９】一方、リフロー炉14では、下側の面状ヒー
タ39の通風穴43は、ワーク状態によっては単なる循環風
の通路としても良い。例えば、ワークＷが両面実装基板
の場合は、ワークＷの下面側と対向する面状ヒータ39の
発熱体42への通電を停止して、面状ヒータ39の通風穴43
を通過する循環風によりワークＷの下面側を冷却し、予
めワークＷの下面側にはんだ付けされた実装部品をリフ
ローしないようにすることにより、ワーク下面の実装部
品のはんだ再溶融による脱落を防止する。On the other hand, in the reflow furnace 14, the ventilation hole 43 of the lower planar heater 39 may be a simple circulating air passage depending on the work condition. For example, when the work W is a double-sided mounting substrate, the power supply to the heating element 42 of the planar heater 39 facing the lower surface of the work W is stopped, and the ventilation holes 43 of the planar heater 39 are stopped.
The lower surface side of the work W is cooled by the circulating wind passing through it, and the mounted parts soldered in advance to the lower side of the work W are prevented from reflowing, thereby preventing the mounted parts on the lower surface of the work W from falling off due to remelting of solder. I do.
【００４０】次に、図４は、本発明に係る実施の他の形
態を示す。この実施形態は、リフロー炉14において、循
環風によるワークＷの下面冷却を、より積極的に行うも
のであり、ワークＷを搬送するチェンコンベヤ26の上側
および下側に、遠赤外線加熱用の面状ヒータ37，39と、
熱風加熱用のモータ16、送風機（シロッコファン）18、
案内板19，20および加熱ヒータ22とがそれぞれ設けら
れ、さらに、炉体15の下部に外気吹込ノズル51が設けら
れ、外気吹込ノズル51にダクト52を介して外気吹込用の
ブロワ53が設けられたものである。Next, FIG. 4 shows another embodiment according to the present invention. In this embodiment, the lower surface of the work W is more positively cooled by the circulating wind in the reflow furnace 14, and the upper and lower surfaces of the chain conveyor 26 for transporting the work W are provided with a far infrared heating surface. Heaters 37 and 39,
Motor 16 for hot air heating, blower (sirocco fan) 18,
Guide plates 19 and 20 and a heater 22 are provided, respectively. Further, an outside air blowing nozzle 51 is provided below the furnace body 15, and a blower 53 for blowing outside air is provided on the outside air blowing nozzle 51 via a duct 52. It is a thing.
【００４１】そして、ワークＷが両面実装基板の場合
は、リフロー炉14において、下側の加熱ヒータ22および
面状ヒータ39への通電のみを停止して、ブロワ53より常
温の空気または不活性ガス（窒素ガスなど）を外気とし
て外気吹込ノズル51より炉体15の下部内に送り込み、下
側の面状ヒータ39の通風穴43を通してワークＷの下面側
を低温の循環風により冷却することにより、ワークＷの
上面でリフロー加熱が行われている最中でも、予めワー
クＷの下面側にはんだ付けされた実装部品のはんだ再溶
融を防止し、その再溶融による実装部品の脱落を防止す
る。When the work W is a double-sided mounting substrate, in the reflow furnace 14, only the power supply to the lower heater 22 and the planar heater 39 is stopped, and the normal temperature air or inert gas is supplied from the blower 53. (Nitrogen gas, etc.) as outside air is sent into the lower part of the furnace body 15 from the outside air blowing nozzle 51, and the lower surface of the work W is cooled by low-temperature circulating air through the ventilation holes 43 of the lower planar heater 39. Even while reflow heating is being performed on the upper surface of the work W, solder re-melting of the mounted component soldered to the lower surface side of the work W in advance is prevented, and the mounted component is prevented from falling off due to the re-melting.
【００４２】このとき、下側の面状ヒータ39は、その通
風穴43により循環風を整流する働きがあり、外気吹込ノ
ズル51から炉体内に吹込まれた外気により炉体内の循環
風が乱されても、その循環風は、面状ヒータ39の通風穴
43により整流されてワークの下面に吹付けられる。At this time, the lower planar heater 39 has a function of rectifying the circulating air by the ventilation hole 43, and the circulating air in the furnace is disturbed by the outside air blown into the furnace from the outside air blowing nozzle 51. However, the circulating wind is
It is rectified by 43 and sprayed on the lower surface of the work.
【００４３】[0043]
【発明の効果】請求項１記載の発明によれば、遠赤外線
を放射する面状ヒータの全面にわたって均一分布の通風
穴を穿設し、その通風穴に熱風加熱手段で生じた熱風を
通すので、熱風加熱を強くするとその効果がワーク全面
に均一に作用して、滑らかなワーク温度上昇プロファイ
ルが得られ、また、遠赤外線加熱を強くしても、面状ヒ
ータ自体の熱容量が大きくかつ均一であるから、連続的
なワーク供給に対してもワーク温度の安定性を向上で
き、熱風加熱および遠赤外線加熱を共に良好な状態で行
うことができ、適切なワーク温度プロファイルを得るこ
とができる。According to the first aspect of the present invention, ventilation holes having a uniform distribution are formed over the entire surface of the planar heater that emits far-infrared rays, and the hot air generated by the hot air heating means is passed through the ventilation holes. When the hot air heating is strengthened, the effect acts uniformly on the entire surface of the work, and a smooth work temperature rise profile is obtained. Also, even if the far infrared heating is strengthened, the heat capacity of the planar heater itself is large and uniform. Therefore, the stability of the work temperature can be improved even for continuous work supply, hot air heating and far-infrared heating can be performed in good conditions, and an appropriate work temperature profile can be obtained.
【００４４】請求項２記載の発明によれば、熱風加熱手
段および面状ヒータが、ワークの上面および下面に対し
配設されたから、ワークの上面だけでなくワークの下面
をも、熱風加熱手段および面状ヒータで加熱することに
より、例えばプリヒート加熱の初期におけるワークの立
上り温度などを効果的に制御できる。According to the second aspect of the present invention, since the hot air heating means and the planar heater are provided on the upper and lower surfaces of the work, not only the upper surface of the work but also the lower surface of the work can be heated and heated by the hot air heating means and the planar heater. By heating with a planar heater, it is possible to effectively control, for example, the rising temperature of the work in the initial stage of preheating heating.
【００４５】請求項３記載の発明によれば、ワークの下
面に対する面状ヒータは、ワークが両面実装基板の場合
はリフロー加熱時に通電を停止して、通風穴を経た風の
みを両面実装基板の下面に供給するものであるから、両
面実装基板の予め実装部品がはんだ付けされた下面側と
対向する面状ヒータへの通電を停止して、この面状ヒー
タの通風穴で整流された比較的低温の風によりワークの
下面側を冷却でき、予めワークの下面側にはんだ付けさ
れた実装部品のリフロー加熱による脱落を防止できる。According to the third aspect of the present invention, when the work is a double-sided mounting substrate, the planar heater for the lower surface of the work stops energization at the time of reflow heating, and only the air passing through the ventilation holes is supplied to the double-sided mounting substrate. Since the power is supplied to the lower surface, the power supply to the planar heater facing the lower surface side of the double-sided mounting board to which the previously mounted components are soldered is stopped, and the flow is rectified by the ventilation holes of the planar heater. The lower surface of the work can be cooled by the low-temperature wind, so that the mounted components soldered in advance to the lower surface of the work can be prevented from falling off due to reflow heating.
【図１】本発明に係るリフロー装置の実施の一形態を示
す横方向の断面図である。FIG. 1 is a lateral cross-sectional view showing an embodiment of a reflow device according to the present invention.
【図２】同上リフロー装置の全体を示すワーク進行方向
の断面図である。FIG. 2 is a cross-sectional view of the reflow device as a whole in a work traveling direction.
【図３】同上リフロー装置の要部を示す拡大断面図であ
る。FIG. 3 is an enlarged sectional view showing a main part of the reflow device.
【図４】本発明に係るリフロー装置の実施の他の形態を
示す横方向の断面図である。FIG. 4 is a lateral sectional view showing another embodiment of the reflow device according to the present invention.
【図５】従来のリフロー装置を示す横方向の断面図であ
る。FIG. 5 is a lateral cross-sectional view showing a conventional reflow device.
【図６】従来のリフロー装置を示すワーク進行方向の断
面図である。FIG. 6 is a sectional view of a conventional reflow device in a work traveling direction.
【図７】従来のリフロー装置の要部を示す断面図および
ワーク温度プロファイルを示す特性図である。FIG. 7 is a sectional view showing a main part of a conventional reflow device and a characteristic diagram showing a work temperature profile.
Ｗ ワーク 15 炉体 37，39 面状ヒータ 40a ，40b 熱風加熱手段 41 ヒータ本体 43 通風穴 W Work 15 Furnace body 37, 39 Planar heater 40a, 40b Hot air heating means 41 Heater body 43 Ventilation hole
Claims (3)
の複数の通風穴が穿設され通電発熱により放射された遠
赤外線により炉体内のワークを加熱する面状ヒータとを
具備したことを特徴とするリフロー装置。1. A furnace body receiving a supply of a work, a hot air heating means for heating the work in the furnace body with hot air, and a plurality of ventilation holes having a uniform distribution are formed over the entire surface of a flat heater body. A reflow apparatus comprising: a planar heater for heating a workpiece in a furnace by far-infrared rays emitted by energized heat generation.
クの上面および下面に対し配設されたことを特徴とする
請求項１記載のリフロー装置。2. The reflow apparatus according to claim 1, wherein the hot air heating means and the planar heater are disposed on an upper surface and a lower surface of the work.
ークが両面実装基板の場合はリフロー加熱時に通電を停
止して、通風穴を経た風のみを両面実装基板の下面に供
給することを特徴とする請求項２記載のリフロー装置。3. The planar heater for the lower surface of the work, wherein when the work is a double-sided mounting substrate, energization is stopped at the time of reflow heating, and only the wind passing through the ventilation hole is supplied to the lower surface of the double-sided mounting substrate. The reflow device according to claim 2, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00068598A JP3974245B2 (en) | 1998-01-06 | 1998-01-06 | Reflow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP00068598A JP3974245B2 (en) | 1998-01-06 | 1998-01-06 | Reflow device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11192545A true JPH11192545A (en) | 1999-07-21 |
| JP3974245B2 JP3974245B2 (en) | 2007-09-12 |
Family
ID=11480626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP00068598A Expired - Lifetime JP3974245B2 (en) | 1998-01-06 | 1998-01-06 | Reflow device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3974245B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6637637B2 (en) | 2000-12-12 | 2003-10-28 | Sharp Kabushiki Kaisha | Reflow apparatus |
| JP2017011082A (en) * | 2015-06-22 | 2017-01-12 | 株式会社鈴木 | Reflow furnace |
-
1998
- 1998-01-06 JP JP00068598A patent/JP3974245B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6637637B2 (en) | 2000-12-12 | 2003-10-28 | Sharp Kabushiki Kaisha | Reflow apparatus |
| JP2017011082A (en) * | 2015-06-22 | 2017-01-12 | 株式会社鈴木 | Reflow furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3974245B2 (en) | 2007-09-12 |
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