WO2005065877A1 - リフロー炉 - Google Patents
リフロー炉 Download PDFInfo
- Publication number
- WO2005065877A1 WO2005065877A1 PCT/JP2004/019498 JP2004019498W WO2005065877A1 WO 2005065877 A1 WO2005065877 A1 WO 2005065877A1 JP 2004019498 W JP2004019498 W JP 2004019498W WO 2005065877 A1 WO2005065877 A1 WO 2005065877A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- furnace
- flux
- reflow furnace
- fume
- reflow
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/0016—Brazing of electronic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/008—Soldering within a furnace
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K3/00—Tools, devices, or special appurtenances for soldering, e.g. brazing, or unsoldering, not specially adapted for particular methods
- B23K3/08—Auxiliary devices therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/36—Electric or electronic devices
- B23K2101/42—Printed circuits
Definitions
- the present invention relates to a reflow furnace for soldering a printed board and a surface mount component with a solder paste.
- Solder paste used for soldering in a reflow furnace is a viscous soldering material composed of powder solder and paste-like flux.
- SMD surface mounted device
- a reflow furnace for soldering a printed circuit board includes a preheating zone, a main heating zone, and a cooling zone in order from the entrance to the exit, and the conveying device travels along these zones. ing.
- the printed circuit board passes through the preheating zone, the main heating zone, and the cooling zone while being transported by the transport device, and is subjected to soldering.
- the solvent contained in the solder paste is evaporated by heating the printed circuit board to 100 to 150 ° C, and the solvent is heated by the high-temperature heating in the main heating zone in the next process.
- the printed board or SMD can be alleviated against heat shock caused by high-temperature heating, and the activation of the flux can be activated. Remove things and dirt to clean
- the temperature is equal to or higher than the melting temperature of the powder solder in the solder paste. Then, the solder paste powder solder applied to the printed circuit board is melted, and the solder spreads between the soldered part of the printed board and the SMD electrode.
- the cooling zone blows cold air to the printed circuit board heated to a high temperature in the main heating zone to solidify the molten solder so that the soldered portion does not collapse due to vibration or impact. Cool quickly to eliminate the effects of residual heat.
- an activator is an essential component in the solder paste flux.
- the activator has a function of reducing and removing the oxide to clean even if the soldered portion of the printed circuit board or the SMD electrode is heated at a high temperature and oxidized during soldering.
- the higher the caloric content the better the solderability and the less defects.
- the flux residue adhering to the soldered part absorbs moisture and becomes an electrolyte, corroding the soldered part and lowering the insulation resistance. . For this reason, printed circuit boards used for communication equipment and computers that require reliability have been washed and removed of flux residues after soldering using solder paste.
- Cleaning fluids such as trichlene-furon have been used to clean this flux residue.However, these cleaning fluids can cause destruction of the ozone layer surrounding the earth and cause global warming. Use is regulated. For this reason, solder paste that does not require cleaning after soldering, that is, non-cleaning solder paste, has come to be used. This non-cleaning solder paste has a small amount of an activator added and a very small amount of flux residue after soldering, so that even without cleaning, problems such as corrosion and a decrease in insulation resistance do not occur. Is the thing.
- the non-cleaning solder paste has a small amount of added activator, when soldering is performed in an atmospheric reflow oven where oxygen is present, oxides of the soldered portion that have been oxidized during heating are completely returned.
- the oxidized powder solder that cannot be removed by force can not be sufficiently reduced if soldering failure occurs because it cannot be removed originally, resulting in the generation of minute solder balls. If soldering is performed in a reflow oven in an inert atmosphere where oxygen is not present even with a non-cleaning solder paste while applying force, the soldered portion will not be oxidized during heating, resulting in poor soldering and the generation of minute solder balls. No soldering is possible.
- inert atmosphere reflow furnace In an inert atmosphere reflow furnace, it is effective to reduce the oxygen concentration in the furnace as much as possible to prevent poor soldering. Therefore, in an inert atmosphere reflow furnace, a device such as a labyrinth is devised at the entrance and exit to prevent air from entering from outside, and air is prevented from entering from outside by suppressing disturbance of hot air in the furnace. RU
- an inert gas flows into a furnace from a gas cylinder or an inert gas generator installed outside, but a new inert gas always flows in the furnace.
- the running cost increases due to the large consumption of the inert gas. Therefore, the inert gas in the furnace is purified and reused. Purification of the inert gas is to remove solvent vapor and flux fume generated from the solder paste during soldering.
- Patent Document 1 JP-A 1-305594
- Patent Document 2 JP-A No. 4-13474
- Patent Document 3 JP-A-4-46667
- Patent Document 4 JP-A-4-251661
- Patent Document 5 JP-A-5-50218
- Patent Document 6 JP-A-9-307224
- Patent Document 7 JP-A-10-335807
- Patent Document 8 Japanese Utility Model Publication No. 5-93079
- the present inventor has found that, when exhausting smoke, if an intake port is provided near the source of the smoke, the smoke can be efficiently exhausted. In order to prevent gas flow, an air curtain should be installed at the entrance.
- the present invention has been completed by focusing on what is necessary.
- the flux generated in the reflow furnace together with the inert gas is led out of the reflow furnace by a pipe, and the flux is removed by a removing device installed outside the reflow furnace.
- the suction pipe of the flux 'fume is installed along at least the entire area of the heating zone along the rail of the transfer device.
- the suction pipe is connected to the inlet of the flux and fume removal device outside the reflow furnace by a discharge nozzle, and the suction pipe is connected to the inlet of the reflow furnace.
- a reflow furnace is characterized in that blow nozzles are installed in upper and lower parts, and the blow nozzles are connected to the outlets of the above-mentioned removing device.
- the flux 'fume generated in the furnace can be efficiently led out of the furnace and purified, so that the flux' fume adheres to the furnace wall and the transfer device.
- the purified inert gas is caused to flow into the furnace at the entrance and exit, so that the inert gas serves as an air curtain at the entrance and exit to prevent the intrusion of air from outside the furnace and prevent the inside of the furnace from entering. Prevents increase in oxygen concentration.
- the suction port of the flux' fume is preferably as close as possible to the printed circuit board. Therefore, in the present invention, the suction port of the flux fume is located near the transfer device, preferably on the rail of the transfer device. An opening is provided at an appropriate position of a long square pipe as a suction port, and the pipe is installed on a rail.
- the suction pipe for sucking the flux 'fume is required at least throughout the heating zone, that is, up to the preheating zone and the main heating zone.
- the solvent in the solder paste evaporates in the pre-heating zone, and the flux vaporizes in the main heating zone. Therefore, these vapors and fumes must be concentrated and absorbed.
- the suction pipe is extended to the cooling zone while applying force, there is an additional effect on the suction of flux and fumes in the furnace. Because the flux and fumes generated in the main heating zone may be carried over to the cooling zone, if the flux 'fume is sucked in, the flux and fume in the furnace can be almost completely absorbed and absorbed. Become.
- FIG. 1 is a front sectional view of a reflow furnace of the present invention
- FIG. 2 is a plan sectional view of a transfer device
- FIG. 3 is a sectional view taken along line AA of FIG. 2
- FIG. 1 is a front sectional view of a reflow furnace of the present invention
- FIG. 2 is a plan sectional view of a transfer device
- FIG. 3 is a sectional view taken along line AA of FIG. 2
- a tunnel 2 is formed in the longitudinal direction.
- a preheating zone 5 a main heating zone 6, and a cooling zone 7 are sequentially formed with the inlet 3 side force and the outlet 4 side force. I'm in love.
- Hot air blowout type heaters 8 are installed in the upper and lower parts of the preheating zone 5 and the main heating zone 6, and coolers 9 and 9 are installed in the upper and lower parts of the cooling zone 5.
- a pair of conveyors 10, 10 runs from the entrance 3 to the exit 4.
- the conveyor 10 runs on rails 11.
- a large number of pins 12 project from the pair of transport conveyors 10 in opposite directions, and the printed circuit board P is placed on the pins and travels in the tunnel 2.
- An inert gas supply port 13 is provided in the hot air blowout type heater 8, and the inert gas supply port is provided with an inert gas supply source (not shown) outside the reflow furnace, such as a nitrogen gas supply source. It is connected to a cylinder or a nitrogen gas tank.
- a square suction pipe 14 is attached along the rail 11 of the conveyor! /
- the suction pipe has a plurality of suction ports 15 formed on the inside, that is, on the side of the printed circuit board to be conveyed.
- the length of the suction pipe 14 may be extended to at least the cooling zone 7 which is necessary for at least the preheating zone 5 and the main heating zone 6 which are portions where the printed circuit board is actually heated.
- Outlet pipes 16, 16 are connected to both ends of the suction pipe 14, and the outlet pipes are connected to a removing device 17 for removing the flux fume.
- the flux / fume removing device 17 is composed of a filter part 18 and an aggregating part 19, and the filter part 18 and the aggregating part 19 are connected by a removing nove 20.
- the filter part 18 has a filter placed inside, and absorbs and removes most of the flux 'fume sucked from the suction pipe 14 by the filter.
- the aggregating section 19 is provided with a professional, and water cooling fins are placed inside. The blower sucks the gas through the suction pipe 14, the outlet pipe 16, the filter part 18 and the removal pipe 20, and the flux fume that cannot be adsorbed and removed by the filter part 18 is brought into contact with the water-cooled fins, where it aggregates. It is collected by attaching.
- Outflow pipes 21, 21 are connected to the outlet of the aggregating section 19, and the outflow pipes are connected to blowout nozzles 22 installed at the upper and lower portions of the entrance and exit of the tunnel! .
- the printed circuit board P is placed on the conveyor 10 from the entrance 3 and is carried into the tunnel 2.
- the printed circuit board P is heated by the hot air blowout type heater 8 in the preheating zone 5, where the solvent in the solder paste is evaporated and preheating is performed to protect the printed circuit board and electronic components from heat shock.
- the solvent evaporated here is sucked into the suction port 15 which opens near the conveyor 10 as shown by arrows in FIGS.
- the printed circuit board P preheated in the preheating zone 5 is then transported to the main heating zone 6, where it is heated to a high temperature to melt the powder solder in the solder paste and wet the soldered portion. spread.
- rosin, activator, thixotropic agent and the like in the solder paste become flux 'fumes, and the flux' fumes also have suction ports 1 opened near the conveyor 10. Sucked into 5.
- the vaporized solvent or flux fume sucked into the suction port 15 also enters the filter part 18 of the removing device through the suction pipe 14 and the outlet pipe 16.
- the flux 'fume' is a gas, it is a collection of fine particles and particles. Therefore, the flux 'fume entering a part of the filter adheres to the filter and is mostly removed. Then, the flux 'fume which can completely remove the particles is transferred to the aggregating section 19 by the removing nove 20, where it contacts the water-cooled fin and is agglomerated and completely removed. Filters with a large amount of flux 'fume attached are removed from a part of the filter and disposed of or disposed of by incineration. At the agglutination part, the flux' fume attached to the water-cooled fin is collected in a lower container and disposed of as industrial waste.
- FIG. 1 is a front sectional view of a reflow furnace of the present invention.
- FIG. 2 is a cross-sectional plan view of the transfer device.
- FIG. 3 is a sectional view taken along line AA of FIG. 2.
- FIG. 4 is an enlarged perspective view of a main part.
- the reflow furnace of the present invention uses a force inert gas suitable for an inert atmosphere reflow furnace V. Needless to say, it can also be used for an atmospheric reflow furnace! Flats' fumes also occur in atmospheric reflow furnaces, but after the hot air in the furnace is purified by an external removal device and then returned to the reflow furnace, warm air can be reused, saving resources.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04807853A EP1702705A4 (en) | 2004-01-07 | 2004-12-27 | reflow |
JP2005516847A JPWO2005065877A1 (ja) | 2004-01-07 | 2004-12-27 | リフロー炉 |
US10/585,328 US20100012709A1 (en) | 2004-01-07 | 2004-12-27 | Reflow furnace |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004001523 | 2004-01-07 | ||
JP2004-001523 | 2004-01-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005065877A1 true WO2005065877A1 (ja) | 2005-07-21 |
Family
ID=34746992
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/019498 WO2005065877A1 (ja) | 2004-01-07 | 2004-12-27 | リフロー炉 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20100012709A1 (ja) |
EP (1) | EP1702705A4 (ja) |
JP (1) | JPWO2005065877A1 (ja) |
KR (1) | KR20060129248A (ja) |
CN (1) | CN1902020A (ja) |
TW (1) | TW200524496A (ja) |
WO (1) | WO2005065877A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113414467A (zh) * | 2021-08-25 | 2021-09-21 | 山东中茂散热器有限公司 | 钎焊炉焊接用送料装置 |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9226407B2 (en) * | 2002-07-01 | 2015-12-29 | Semigear Inc | Reflow treating unit and substrate treating apparatus |
US8110015B2 (en) | 2007-05-30 | 2012-02-07 | Illinois Tool Works, Inc. | Method and apparatus for removing contaminants from a reflow apparatus |
US8104662B2 (en) * | 2009-07-24 | 2012-01-31 | Flextronics Ap Llc | Inert environment enclosure |
WO2011094615A2 (en) * | 2010-01-29 | 2011-08-04 | C.A. Litzler Co., Inc. | End seal for oxidation oven |
JP4978723B2 (ja) * | 2010-09-17 | 2012-07-18 | 千住金属工業株式会社 | はんだ付け装置 |
JP5299409B2 (ja) * | 2010-11-19 | 2013-09-25 | 千住金属工業株式会社 | 搬送装置 |
JP5459294B2 (ja) * | 2011-11-15 | 2014-04-02 | 株式会社デンソー | リフロー装置 |
US9198300B2 (en) * | 2014-01-23 | 2015-11-24 | Illinois Tool Works Inc. | Flux management system and method for a wave solder machine |
US9161459B2 (en) | 2014-02-25 | 2015-10-13 | Illinois Tool Works Inc. | Pre-heater latch and seal mechanism for wave solder machine and related method |
DE102016110040A1 (de) * | 2016-05-31 | 2017-11-30 | Endress + Hauser Gmbh + Co. Kg | Fertigungslinie zum Löten |
CN106304682A (zh) * | 2016-08-16 | 2017-01-04 | 成都俱进科技有限公司 | 用于smt生产工艺的回流焊接装置 |
CN106061137A (zh) * | 2016-08-16 | 2016-10-26 | 成都俱进科技有限公司 | Smt贴片打样机 |
CN106304679A (zh) * | 2016-08-16 | 2017-01-04 | 成都俱进科技有限公司 | 一种smt回流焊装置 |
CN110385496B (zh) | 2018-04-20 | 2022-09-30 | 伊利诺斯工具制品有限公司 | 回流焊炉及其操作方法 |
WO2019204623A1 (en) * | 2018-04-20 | 2019-10-24 | Illinois Tool Works Inc. | Reflow oven and operation method thereof |
CN112935450A (zh) * | 2019-12-10 | 2021-06-11 | 伊利诺斯工具制品有限公司 | 回流焊炉 |
CN112822867B (zh) * | 2020-12-31 | 2022-12-27 | 北京盈创力和电子科技有限公司 | 一种集成电路载体pcb线路板防虚焊漏焊设备及使用方法 |
CN113245661B (zh) * | 2021-07-07 | 2021-11-12 | 江苏长实基业电气科技有限公司 | 一种波峰焊机烟气处理装置 |
DE102021129122B4 (de) * | 2021-11-09 | 2024-03-07 | Ersa Gmbh | Lötanlage, insbesondere Reflowlötanlage mit Abdeckhaube und schaltbarem Absaugkanal |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01305594A (ja) * | 1988-06-03 | 1989-12-08 | Kenji Kondo | リフローはんだ付け方法およびその装置 |
JP2000040874A (ja) * | 1998-07-24 | 2000-02-08 | Nihon Dennetsu Keiki Co Ltd | リフローはんだ付け装置 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3191398B2 (ja) * | 1992-04-21 | 2001-07-23 | 松下電器産業株式会社 | リフロー装置 |
JP3131090B2 (ja) * | 1994-01-25 | 2001-01-31 | 日本電熱計器株式会社 | はんだ付け装置 |
US6780225B2 (en) * | 2002-05-24 | 2004-08-24 | Vitronics Soltec, Inc. | Reflow oven gas management system and method |
-
2004
- 2004-12-15 TW TW093138828A patent/TW200524496A/zh unknown
- 2004-12-27 JP JP2005516847A patent/JPWO2005065877A1/ja active Pending
- 2004-12-27 US US10/585,328 patent/US20100012709A1/en not_active Abandoned
- 2004-12-27 WO PCT/JP2004/019498 patent/WO2005065877A1/ja active Application Filing
- 2004-12-27 KR KR1020067013598A patent/KR20060129248A/ko not_active Application Discontinuation
- 2004-12-27 CN CNA2004800401035A patent/CN1902020A/zh active Pending
- 2004-12-27 EP EP04807853A patent/EP1702705A4/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01305594A (ja) * | 1988-06-03 | 1989-12-08 | Kenji Kondo | リフローはんだ付け方法およびその装置 |
JP2000040874A (ja) * | 1998-07-24 | 2000-02-08 | Nihon Dennetsu Keiki Co Ltd | リフローはんだ付け装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1702705A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113414467A (zh) * | 2021-08-25 | 2021-09-21 | 山东中茂散热器有限公司 | 钎焊炉焊接用送料装置 |
CN113414467B (zh) * | 2021-08-25 | 2021-11-19 | 山东中茂散热器有限公司 | 钎焊炉焊接用送料装置 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2005065877A1 (ja) | 2007-12-20 |
CN1902020A (zh) | 2007-01-24 |
TW200524496A (en) | 2005-07-16 |
EP1702705A1 (en) | 2006-09-20 |
EP1702705A4 (en) | 2008-12-03 |
KR20060129248A (ko) | 2006-12-15 |
US20100012709A1 (en) | 2010-01-21 |
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