JP3367740B2 - Reflow equipment - Google Patents
Reflow equipmentInfo
- Publication number
- JP3367740B2 JP3367740B2 JP03877194A JP3877194A JP3367740B2 JP 3367740 B2 JP3367740 B2 JP 3367740B2 JP 03877194 A JP03877194 A JP 03877194A JP 3877194 A JP3877194 A JP 3877194A JP 3367740 B2 JP3367740 B2 JP 3367740B2
- Authority
- JP
- Japan
- Prior art keywords
- speed
- heater
- hot air
- substrate
- increasing nozzle
- 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.)
- Expired - Fee Related
Links
Landscapes
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、窒素リフロー装置また
はエアリフロー装置等のリフロー装置に関するものであ
る。
【０００２】
【従来の技術】図２に示されるように、リフロー装置
は、炉体１の内部にファン駆動モータ２により駆動され
る送風機（シロッコファン）３と送風案内板４とにより
炉内雰囲気を循環させる循環経路を形成し、この循環経
路の上流側から、炉内雰囲気を加熱して熱風とするヒー
タ５と、この熱風を絞って風速を高める増速ノズル６
と、この増速ノズル６からの熱風噴出部分を経て部品実
装基板Ｐを搬送するコンベヤ７とが配置されている。
【０００３】そして、送風機３より発生した雰囲気流を
ヒータ５で加熱して熱風とし、この熱風を増速ノズル６
で絞って高速で基板Ｐに吹付けることにより、基板Ｐを
加熱し、リフローはんだ付けを行う。
【０００４】
【発明が解決しようとする課題】この種のリフロー装置
は、熱風による加熱方式と赤外線による加熱方式とを適
切に併用できると、種々の部品実装に対応できる利点が
ある。
【０００５】しかし、増速ノズル６の間隔を狭めて熱風
加熱方式を重視すると、ヒータ５から放射される赤外線
が増速ノズル６により遮られ、一方、増速ノズル６の間
隔を拡げて赤外線加熱方式を重視すると、増速ノズル６
の効果が薄れるという問題がある。
【０００６】本発明は、このような点に鑑みなされたも
ので、熱風加熱方式と赤外線加熱方式とを適切に併用で
きるリフロー装置を提供することを目的とする。
【０００７】
【課題を解決するための手段】本発明は、炉体内に送風
機により炉内雰囲気を循環させる循環経路を形成し、こ
の循環経路の上流側から、炉内雰囲気を加熱して熱風と
するヒータと、この熱風を絞って風速を高める増速ノズ
ルと、この増速ノズルからの熱風噴出部分を経て基板を
搬送するコンベヤとが配置されたリフロー装置におい
て、前記ヒータにより十分に加熱される位置に増速ノズ
ルが配置され、この増速ノズルの基板に相対する表面に
赤外線放射塗料が塗布された構成のリフロー装置であ
る。
【０００８】
【作用】本発明は、ヒータにより加熱された熱風を増速
ノズルにて絞り、コンベヤで搬送される基板に吹付ける
ことにより熱風加熱を行う。同時に、ヒータにより加熱
された増速ノズルは、赤外線放射塗料の塗布されている
表面から基板に赤外線を放射するので、赤外線加熱も併
用できる。
【０００９】
【実施例】以下、本発明を図１および図２に示される実
施例を参照して詳細に説明する。なお、本発明に係るリ
フロー装置の全体図は従来例と共通の図２を使用する
が、既に従来技術の項で図２に基づきリフロー装置の全
体説明を行っているから、その説明は省略する。
【００１０】図１（Ａ）に示されるように、炉体１の天
板部に角枠状のヒータホルダ８が取付けられている。こ
のヒータホルダ８は、図２に示されるように左右両側部
の上部に通風開口8aを有するとともに、その下側に取付
板部8bを有し、この左右両側の取付板部8bの下側に支持
板部8cが一体形成され、この両側の支持板部8c間が開口
されている。
【００１１】このヒータホルダ８の取付板部8bの上段間
に、炉内雰囲気を加熱して熱風とする多数のヒータ５が
図１（Ａ）に示されるように所定間隔を介して配列さ
れ、また取付板部8bの下段間に、熱風を絞って風速を高
める増速ノズル６が取付けられている。この増速ノズル
６は、ヒータ５によって十分に加熱される近接位置に設
けられている。
【００１２】この増速ノズル６は、図１（Ａ）（Ｂ）に
示されるように多数の逆Ｖ形部材6aを基板搬送方向にヒ
ータ配列ピッチと等ピッチで配列することにより、各逆
Ｖ形部材6aの間に先細形の熱風噴出口6bを設けたもので
あり、各逆Ｖ形部材6aおよび熱風噴出口6bは、図１
（Ｂ）に示されるようにコンベヤ７の全幅に対応できる
ように長尺に形成されている。
【００１３】図１（Ａ）に示されるように、前記増速ノ
ズル６を構成する各々の逆Ｖ形部材6aの基板Ｐに相対す
る下側表面と、ヒータホルダ８の基板Ｐに相対する支持
板部8cの下側表面とに、それぞれ赤外線放射塗料９が塗
布されている。
【００１４】次に、この実施例の作用を説明すると、送
風機３により炉体１内を循環する炉内雰囲気は、ヒータ
ホルダ８の通風開口8aからヒータホルダ８内に入るとヒ
ータ５により加熱されて熱風となり、この熱風は、増速
ノズル６の逆Ｖ形部材6a間で絞られて風速を上げ、その
熱風噴出口6bよりコンベヤ７にて搬送される基板Ｐに吹
付けられて基板を加熱し、この熱風加熱により基板上の
ソルダペーストを溶融する。
【００１５】同時に、増速ノズル６の逆Ｖ形部材6aなど
は、ヒータ５により加熱されると赤外線放射塗料９の塗
布されている下面から赤外線を効率良く放射するので、
ヒータ５の表面から逆Ｖ形部材6a間の熱風噴出口6bを通
って基板に直接放射される赤外線とともに、基板Ｐを赤
外線加熱する。
【００１６】この赤外線加熱は、熱容量の大きい黒色の
基板搭載部品を効率良く加熱する場合に効果がある。
【００１７】
【発明の効果】本発明によれば、増速ノズルの基板相対
表面に赤外線放射塗料を塗布したから、増速ノズルによ
る熱風加熱に加えて、赤外線放射塗料により効果的な赤
外線加熱も併用でき、種々の部品実装に適切に対応でき
る。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reflow device such as a nitrogen reflow device or an air reflow device. 2. Description of the Related Art As shown in FIG. 2, a reflow apparatus comprises a furnace (sirocco fan) 3 driven by a fan drive motor 2 inside a furnace body 1 and a blow guide plate 4 for controlling the atmosphere in the furnace. A heater 5 is provided to form a circulation path for circulating water, and a heater 5 for heating the furnace atmosphere to generate hot air from an upstream side of the circulation path,
And a conveyor 7 that conveys the component mounting board P through a hot air jetting portion from the speed increasing nozzle 6. The atmosphere flow generated by the blower 3 is heated by a heater 5 to generate hot air.
The substrate P is heated by high-speed spraying onto the substrate P, and reflow soldering is performed. [0004] This type of reflow apparatus has an advantage that it can cope with various component mountings if a heating method using hot air and a heating method using infrared rays can be used in combination appropriately. However, if the hot air heating method is emphasized by narrowing the interval between the speed increasing nozzles 6, infrared rays emitted from the heater 5 are blocked by the speed increasing nozzles 6. When focusing on the method, the speed-up nozzle 6
There is a problem that the effect of is weakened. SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a reflow apparatus capable of appropriately using a hot air heating method and an infrared heating method. According to the present invention, a circulation path for circulating the furnace atmosphere by a blower in a furnace body is formed, and the furnace atmosphere is heated from the upstream side of the circulation path to generate hot air. In a reflow apparatus in which a heater that performs heating, a speed-increasing nozzle that throttles the hot air to increase the wind speed, and a conveyor that conveys a substrate through a hot-air jetting portion from the speed-in nozzle are arranged, the heater is sufficiently heated. This is a reflow device having a configuration in which a speed increasing nozzle is disposed at a position, and an infrared radiation paint is applied to a surface of the speed increasing nozzle facing the substrate. According to the present invention, hot air heated by a heater is narrowed by a speed-increasing nozzle and is blown onto a substrate conveyed by a conveyor to perform hot air heating. At the same time, the speed increasing nozzle heated by the heater emits infrared rays from the surface on which the infrared radiation paint is applied to the substrate, so that infrared heating can also be used. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in FIGS. Although FIG. 2 which is the same as the conventional example is used for the overall view of the reflow apparatus according to the present invention, since the entire description of the reflow apparatus has already been made based on FIG. . As shown in FIG. 1A, a square frame-shaped heater holder 8 is mounted on the top plate of the furnace body 1. As shown in FIG. 2, the heater holder 8 has ventilation openings 8a in the upper portions on both left and right sides, and has a mounting plate portion 8b below the ventilation openings 8a, and is supported below the mounting plate portions 8b on the left and right sides. The plate portion 8c is integrally formed, and an opening is provided between the support plate portions 8c on both sides. A large number of heaters 5 which heat the atmosphere in the furnace and generate hot air are arranged at predetermined intervals as shown in FIG. 1 (A) between upper stages of the mounting plate portion 8b of the heater holder 8. A speed-increasing nozzle 6 is mounted between the lower stage of the mounting plate portion 8b to reduce the hot air and increase the wind speed. The speed-increasing nozzle 6 is provided at a close position where it is sufficiently heated by the heater 5. As shown in FIGS. 1 (A) and 1 (B), the speed increasing nozzle 6 has a plurality of inverted V-shaped members 6a arranged at the same pitch as the heater arrangement pitch in the substrate transfer direction. A tapered hot air outlet 6b is provided between the shaped members 6a. Each inverted V-shaped member 6a and hot air outlet 6b are
As shown in (B), it is formed long so as to correspond to the entire width of the conveyor 7. [0013] As shown in FIG. 1 (A), the opposite lower surface of the substrate P of the inverted V-shaped member 6a of each constituting the acceleration nozzle 6, facing the support plate to the substrate P of the heater holder 8 An infrared radiation paint 9 is applied to the lower surface of the portion 8c. Next, the operation of this embodiment will be described. The atmosphere inside the furnace circulated through the furnace body 1 by the blower 3 is heated by the heater 5 when it enters the heater holder 8 through the ventilation opening 8a of the heater holder 8 and is heated by the hot air. This hot air is throttled between the inverted V-shaped members 6a of the speed increasing nozzle 6 to increase the wind speed, and is blown from the hot air outlet 6b onto the substrate P conveyed by the conveyor 7 to heat the substrate, The hot air heating melts the solder paste on the substrate. At the same time, the inverted V-shaped member 6a of the speed-increasing nozzle 6 efficiently radiates infrared rays from the lower surface on which the infrared radiation paint 9 is applied when heated by the heater 5.
The substrate P is infrared-heated together with the infrared radiation directly emitted from the surface of the heater 5 to the substrate through the hot air outlet 6b between the inverted V-shaped members 6a. This infrared heating is effective for efficiently heating a black board-mounted component having a large heat capacity. According to the present invention, since the infrared radiation paint is applied to the substrate relative surface of the speed increasing nozzle, in addition to the hot air heating by the speed increasing nozzle, the effective infrared heating by the infrared radiation paint is also provided. It can be used together, and can appropriately cope with various component mounting.
【図面の簡単な説明】
【図１】（Ａ）は本発明のリフロー装置に使用されてい
るヒータおよび増速ノズル取付部分の断面図、（Ｂ）は
その増速ノズルの底面図である。
【図２】従来および本発明に共通のリフロー装置の全体
を示す断面図である。
【符号の説明】
Ｐ 基板
１ 炉体
３ 送風機
５ ヒータ
６ 増速ノズル
７ コンベヤ
９ 赤外線放射塗料BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a cross-sectional view of a heater and a speed increasing nozzle used in a reflow device of the present invention, and FIG. 1B is a bottom view of the speed increasing nozzle. FIG. 2 is a cross-sectional view showing the entire reflow apparatus common to the conventional art and the present invention. [Description of Signs] P substrate 1 Furnace 3 Blower 5 Heater 6 Speed-up nozzle 7 Conveyor 9 Infrared radiation paint
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−339561（ＪＰ，Ａ) 特開 平２−99266（ＪＰ，Ａ) 特開 平４−249882（ＪＰ，Ａ) 特開 平２−137691（ＪＰ，Ａ) 特開 平２−84292（ＪＰ，Ａ) 実開 平３−101390（ＪＰ，Ｕ) 実開 平３−43770（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) H05K 3/34 B23K 1/008 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-339561 (JP, A) JP-A-2-99266 (JP, A) JP-A-4-249882 (JP, A) JP-A-2-249 137691 (JP, A) JP-A-2-84292 (JP, A) JP-A-3-101390 (JP, U) JP-A-3-43770 (JP, U) (58) Fields investigated (Int. 7 , DB name) H05K 3/34 B23K 1/008
Claims (1)
させる循環経路を形成し、この循環経路の上流側から、
炉内雰囲気を加熱して熱風とするヒータと、この熱風を
絞って風速を高める増速ノズルと、この増速ノズルから
の熱風噴出部分を経て基板を搬送するコンベヤとが配置
されたリフロー装置において、 前記ヒータにより十分に加熱される位置に増速ノズルが
配置され、この増速ノズルの基板に相対する表面に赤外
線放射塗料が塗布されたことを特徴とするリフロー装
置。(57) [Claims] [Claim 1] A circulation path for circulating the furnace atmosphere by a blower in a furnace body is formed, and from the upstream side of the circulation path,
In a reflow apparatus in which a heater for heating an atmosphere in a furnace to generate hot air, a speed-increasing nozzle that narrows the hot air to increase the wind speed, and a conveyor that conveys a substrate through a hot-air jetting portion from the speed-increasing nozzle are arranged. A reflow apparatus, wherein a speed-increasing nozzle is disposed at a position sufficiently heated by the heater, and an infrared radiation paint is applied to a surface of the speed-increasing nozzle facing the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03877194A JP3367740B2 (en) | 1994-03-09 | 1994-03-09 | Reflow equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03877194A JP3367740B2 (en) | 1994-03-09 | 1994-03-09 | Reflow equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07249860A JPH07249860A (en) | 1995-09-26 |
| JP3367740B2 true JP3367740B2 (en) | 2003-01-20 |
Family
ID=12534562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03877194A Expired - Fee Related JP3367740B2 (en) | 1994-03-09 | 1994-03-09 | Reflow equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3367740B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4127482B2 (en) * | 2002-05-14 | 2008-07-30 | 松下電器産業株式会社 | Reflow heating device |
| JP4378090B2 (en) * | 2003-02-26 | 2009-12-02 | 日本ファーネス株式会社 | Hot air circulation furnace |
-
1994
- 1994-03-09 JP JP03877194A patent/JP3367740B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07249860A (en) | 1995-09-26 |
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