JP2992123B2 - Starting method of inert gas reflow device - Google Patents
Starting method of inert gas reflow deviceInfo
- Publication number
- JP2992123B2 JP2992123B2 JP13113491A JP13113491A JP2992123B2 JP 2992123 B2 JP2992123 B2 JP 2992123B2 JP 13113491 A JP13113491 A JP 13113491A JP 13113491 A JP13113491 A JP 13113491A JP 2992123 B2 JP2992123 B2 JP 2992123B2
- Authority
- JP
- Japan
- Prior art keywords
- inert gas
- furnace
- heater
- reflow
- substrate
- 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 - Lifetime
Links
Landscapes
- Tunnel Furnaces (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Description
【０００１】〔発明の目的〕[Object of the invention]
【０００２】[0002]
【産業上の利用分野】本発明は、窒素ガス等の不活性ガ
スを使用する不活性ガスリフロー装置の始動方法に関す
るものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for starting an inert gas reflow apparatus using an inert gas such as nitrogen gas.
【０００３】[0003]
【従来の技術】図２に示されるように、炉11の内部に仕
切板12により複数のプリヒート室13およびリフロー室14
が形成され、各室13，14にファン15およびヒータ16が設
けられ、炉11に対し窒素等の不活性ガスの注入口17が設
けられ、そして、基板搬入口18から基板搬出口19にわた
って炉内を貫通した基板コンベヤ20により面実装基板Ｐ
を搬送しながら、ヒータ16により加熱された不活性ガス
をファン15により基板Ｐに吹付け、高温の不活性ガスが
有する熱で基板Ｐのソルダペーストをリフローするリフ
ロー装置がある。2. Description of the Related Art As shown in FIG. 2, a plurality of preheat chambers 13 and a reflow chamber
A fan 15 and a heater 16 are provided in each of the chambers 13 and 14, an inlet 17 for an inert gas such as nitrogen is provided for the furnace 11, and a furnace is provided from the substrate carrying-in port 18 to the substrate carrying-out port 19. Surface mount board P by the board conveyor 20
There is a reflow apparatus in which an inert gas heated by a heater 16 is blown onto a substrate P by a fan 15 while conveying the solder paste, and the solder paste of the substrate P is reflowed by heat of the high-temperature inert gas.
【０００４】従来は、このようなリフロー装置を始動す
るときは、ヒータ16への通電開始と同時に、前記注入口
17から炉内に不活性ガス（窒素）を注入し、この不活性
ガスを加熱するようにしている。Conventionally, when such a reflow apparatus is started, the power supply to the heater 16 is started simultaneously with the start of the injection port.
An inert gas (nitrogen) is injected into the furnace from 17 and the inert gas is heated.
【０００５】[0005]
【発明が解決しようとする課題】最近になって、この不
活性ガスの同時注入は、炉内に付着しているフラックス
の気化除去を妨げたり、始動時に多量の不活性ガスを消
費する原因となっていることがわかってきた。Recently, the simultaneous injection of the inert gas is a cause of preventing the vaporization and removal of the flux adhering to the furnace and of consuming a large amount of the inert gas at the time of starting. I know it's turned.
【０００６】本発明は、このような点に鑑みなされたも
ので、不活性ガスリフロー装置の始動方法を改善するこ
とで、始動時の炉内フラックスの気化促進、始動時の不
活性ガス消費量の低減等を図ることを目的とするもので
ある。The present invention has been made in view of the above points, and by improving the starting method of an inert gas reflow device, the promotion of vaporization of the furnace flux at the time of starting and the consumption of inert gas at the time of starting are improved. The purpose of the present invention is to reduce the number of times.
【０００７】〔発明の構成〕[Configuration of the Invention]
【０００８】[0008]
【課題を解決するための手段】本発明は、炉11内のヒー
タ16により加熱された不活性ガス中でリフローはんだ付
けを行うリフロー装置において、ヒータ16への通電開始
から時間をおいて炉11内に不活性ガスを注入する不活性
ガスリフロー装置の始動方法である。SUMMARY OF THE INVENTION The present invention relates to a reflow apparatus for performing reflow soldering in an inert gas heated by a heater 16 in a furnace 11. This is a method for starting an inert gas reflow device for injecting an inert gas into the inside.
【０００９】[0009]
【作用】本発明は、始動時にヒータ16への通電のみを行
い、炉内フラックスと酸素との化合により炉内付着フラ
ックスの気化除去を促進し、また、炉内空気の熱膨張に
より大気中より酸素密度を低下させ、この低酸素密度の
炉内に対し不活性ガスの注入を開始する。According to the present invention, only electric power is supplied to the heater 16 at the time of start-up to promote the vaporization and removal of the adhered flux in the furnace by combining the flux in the furnace with oxygen. The oxygen density is reduced, and the injection of the inert gas into the low oxygen density furnace is started.
【００１０】[0010]
【実施例】以下、本発明を図１に示される実施例を参照
して詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in FIG.
【００１１】炉11の内部に仕切板12により複数のプリヒ
ート室13およびリフロー室14が形成され、各室13，14に
ファン15およびヒータ16が設けられ、さらに各室13，14
に対し窒素等の不活性ガスの注入口17が設けられてい
る。炉11の一側および他側には基板搬入口18および基板
搬出口19が設けられ、基板搬入口18から基板搬出口19に
わたって炉内を貫通した基板コンベヤ20が設けられてい
る。A plurality of preheat chambers 13 and a plurality of reflow chambers 14 are formed inside the furnace 11 by a partition plate 12, and a fan 15 and a heater 16 are provided in each of the chambers 13, 14, and further, each of the chambers 13, 14 is provided.
An inlet 17 for an inert gas such as nitrogen is provided. On one side and the other side of the furnace 11, a substrate carry-in port 18 and a substrate carry-out port 19 are provided, and a substrate conveyor 20 penetrating through the furnace from the substrate carry-in port 18 to the substrate carry-out port 19 is provided.
【００１２】前記各室の注入口17に、窒素ボンベ等の不
活性ガス供給源21から窒素等の不活性ガスを供給する管
路22が接続され、この管路中に電磁弁23が介設され、こ
の電磁弁23のソレノイド24に接続された駆動回路にタイ
マ25が設けられている。A conduit 22 for supplying an inert gas such as nitrogen from an inert gas supply source 21 such as a nitrogen cylinder is connected to the inlet 17 of each chamber, and an electromagnetic valve 23 is provided in the conduit. A timer 25 is provided in a drive circuit connected to the solenoid 24 of the solenoid valve 23.
【００１３】次に、この実施例の作用を説明する。Next, the operation of this embodiment will be described.
【００１４】始動時は、電磁弁23を閉じた状態で、ヒー
タ電源投入によりヒータ16への通電のみを開始し、炉内
に付着したフラックスと炉内空気中の酸素とを化合させ
て、炉内付着フラックスの気化を促進し、炉内残留フラ
ックスを除去する。なお、このような現象は、窒素等の
不活性ガス中では起こらない。また、ヒータ16のみの運
転により炉内空気が熱膨張して、炉内酸素密度が低下す
る。At the time of starting, only the energization of the heater 16 is started by turning on the heater power while the solenoid valve 23 is closed, and the flux adhering to the inside of the furnace is combined with oxygen in the air in the furnace to form a furnace. It promotes the vaporization of the flux attached inside and removes the residual flux in the furnace. Such a phenomenon does not occur in an inert gas such as nitrogen. In addition, the furnace air is thermally expanded by the operation of only the heater 16, and the furnace oxygen density is reduced.
【００１５】そして、ヒータ16への通電開始から時間を
おいて、例えば３０分程度のヒータ16への通電を行った
後、タイマ25により電磁弁23を開いて、熱膨張により低
酸素密度の炉内に対し不活性ガスの注入を開始する。こ
のとき、前記熱膨張により初めから低酸素濃度状態にあ
る炉内に不活性ガスを供給するので、一定低酸素濃度に
低下するまでの窒素等の不活性ガスの炉内注入量も少な
くて済む。After a certain time from the start of energization of the heater 16, the energization of the heater 16 is performed for, for example, about 30 minutes. Then, the solenoid valve 23 is opened by the timer 25, and the low oxygen density furnace is opened due to thermal expansion. Inject the inert gas into the interior. At this time, since the inert gas is supplied into the furnace in the low oxygen concentration state from the beginning due to the thermal expansion, the amount of the inert gas such as nitrogen to be injected into the furnace until the oxygen concentration decreases to a certain low oxygen concentration can be reduced. .
【００１６】このようにして、炉内が一定の温度かつ一
定の低酸素濃度に達したら、基板搬入口18から基板コン
ベヤ20により炉内に面実装基板Ｐを搬入し、ヒータ16に
より加熱された不活性ガスをファン15により基板Ｐに吹
付け、複数のプリヒート室13では高温の不活性ガスが有
する熱で基板Ｐを予加熱し、リフロー室14ではさらに高
温の不活性ガスが有する熱で基板Ｐのソルダペーストを
リフローする。In this manner, when the inside of the furnace reaches a certain temperature and a certain low oxygen concentration, the surface mounting substrate P is carried into the furnace by the substrate conveyor 20 from the substrate carrying-in port 18 and heated by the heater 16. An inert gas is blown onto the substrate P by a fan 15, the substrate P is preheated in a plurality of preheating chambers 13 by the heat of the high-temperature inert gas, and the substrate is heated in the reflow chamber 14 by the heat of the higher-temperature inert gas. Reflow the P solder paste.
【００１７】[0017]
【発明の効果】本発明によれば、ヒータへの通電開始か
ら時間をおいて炉内に不活性ガスを注入するようにした
から、始動時に炉内高温雰囲気中での酸素との化合によ
りガス化する炉内残留フラックスの気化を促進できると
ともに、炉内空気の熱膨張により炉内酸素密度の低下を
図り、始動時の低酸素濃度を達成するための不活性ガス
消費量を低減できる。According to the present invention, the inert gas is injected into the furnace after a certain time from the start of energization of the heater. In addition to promoting the vaporization of the residual flux in the furnace, the oxygen density in the furnace can be reduced by the thermal expansion of the furnace air, and the consumption of inert gas for achieving a low oxygen concentration at the start can be reduced.
【図１】本発明の始動方法に係る不活性ガスリフロー装
置の一実施例を示す断面図である。FIG. 1 is a sectional view showing one embodiment of an inert gas reflow device according to a starting method of the present invention.
【図２】従来の始動方法に係る不活性ガスリフロー装置
の断面図である。FIG. 2 is a sectional view of an inert gas reflow device according to a conventional starting method.
11 炉 16 ヒータ 11 Furnace 16 Heater
───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮本 康夫 埼玉県狭山市上広瀬東久保591番地の11 株式会社タムラ製作所 機工工場内 (72)発明者 内田 俊也 埼玉県狭山市上広瀬東久保591番地の11 株式会社タムラ製作所 機工工場内 (56)参考文献 特開 昭63−30177（ＪＰ，Ａ) 特開 平３−8564（ＪＰ，Ａ) 特開 平３−77773（ＪＰ，Ａ) 特開 平４−13475（ＪＰ，Ａ) 特開 平４−46666（ＪＰ，Ａ) 特開 平４−253566（ＪＰ，Ａ) 特開 平４−262860（ＪＰ，Ａ) 特開 平４−322878（ＪＰ，Ａ) 特開 平４−274868（ＪＰ，Ａ) 特開 昭62−101372（ＪＰ，Ａ) 実開 昭63−150760（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B23K 1/008 - 1/012 B23K 31/02 310 H05K 3/34 507 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuo Miyamoto 591-1, Higashikubo, Kamihirose, Sayama City, Saitama Prefecture Inside the Kiko Factory (72) Inventor Toshiya Uchida 5191, 591 Higashikubo, Higashikubo, Sayama City, Saitama Prefecture (56) References JP-A-63-30177 (JP, A) JP-A-3-8564 (JP, A) JP-A-3-77773 (JP, A) JP-A-4- 13475 (JP, A) JP-A-4-46666 (JP, A) JP-A-4-253566 (JP, A) JP-A-4-262860 (JP, A) JP-A-4-322878 (JP, A) JP-A-4-274868 (JP, A) JP-A-62-101372 (JP, A) JP-A-63-150760 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) B23K 1/008-1/012 B23K 31/02 310 H05K 3/34 507
Claims (1)
ス中でリフローはんだ付けを行うリフロー装置におい
て、ヒータへの通電開始から時間をおいて炉内に不活性
ガスを注入することを特徴とする不活性ガスリフロー装
置の始動方法。1. A reflow apparatus for performing reflow soldering in an inert gas heated by a heater in a furnace, wherein the inert gas is injected into the furnace at a time after the start of energization of the heater. To start an inert gas reflow device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13113491A JP2992123B2 (en) | 1991-06-03 | 1991-06-03 | Starting method of inert gas reflow device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13113491A JP2992123B2 (en) | 1991-06-03 | 1991-06-03 | Starting method of inert gas reflow device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04356350A JPH04356350A (en) | 1992-12-10 |
| JP2992123B2 true JP2992123B2 (en) | 1999-12-20 |
Family
ID=15050785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13113491A Expired - Lifetime JP2992123B2 (en) | 1991-06-03 | 1991-06-03 | Starting method of inert gas reflow device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2992123B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815655B2 (en) * | 1993-04-28 | 1996-02-21 | ユニオン空調工業株式会社 | Brazing method for refrigerant pipe joints |
| TWI689455B (en) * | 2019-07-30 | 2020-04-01 | 群翊工業股份有限公司 | Nitrogen box capable of preventing board deviation from continuous passage |
-
1991
- 1991-06-03 JP JP13113491A patent/JP2992123B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04356350A (en) | 1992-12-10 |
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