GB1484604A - Methods and apparatus for vapour heating of articles - Google Patents
Methods and apparatus for vapour heating of articlesInfo
- Publication number
- GB1484604A GB1484604A GB3858474A GB3858474A GB1484604A GB 1484604 A GB1484604 A GB 1484604A GB 3858474 A GB3858474 A GB 3858474A GB 3858474 A GB3858474 A GB 3858474A GB 1484604 A GB1484604 A GB 1484604A
- Authority
- GB
- United Kingdom
- Prior art keywords
- vapour
- vessel
- solder
- liquid
- coils
- 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
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
- B23K1/012—Soldering with the use of hot gas
- B23K1/015—Vapour-condensation soldering
-
- 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
- B23K1/08—Soldering by means of dipping in molten solder
- B23K1/085—Wave soldering
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electric Connection Of Electric Components To Printed Circuits (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
1484604 Heating chambers WESTERN ELECTRIC CO Inc 4 Sept 1974 [7 Sept 1973 5 June 1974] 38584/74 Heading F4U [Also in Division B3] In heating an article to perform an operation thereon, a liquid is boiled to generate a saturated vapour, and the article is immersed in the vapour. A vessel 1, Fig. 1, is in an embodiment provided with electric heating coils 2 at the bottom and at the top cooling coils 3, e.g. of copper receiving a cooling medium, e.g. water. The vessel may be also located on a hot plate for additional heating. The liquid 4 is boiled in the vessel and the vapour therefrom fills the vessel, the coils 3 condensing the vapour and the condensed vapour draining back. A printed circuit board 6 having components mounted thereon for soldering thereto by solder preforms or plating is suspended in the vapour in the vessel, whereupon the vapour condenses on the board giving up latent heat of vaporization and heating the board to the temperature of the vapour which is at least equal to and is prepreferably above the melting point of the solder. The condensed vapour on the board carries away grease or dirt on the board and may eliminate the need for fluxing the board. A batch of boards may be simultaneously soldered. The liquid employed is preferably a fluorocarbon, e.g. a fluorinated polyoxypropylene which is chemically stable, inert, non-toxic and non- inflammable and the apparatus described may be used for brazing or fusing a coating of solder on a board. In another embodiment a vessel 8, Fig. 2, with inlet and outlet conduits 9, 10 at opposite ends and cooling coils 11, 12 in the conduits has a conveyer 13, for articles to be soldered, passing in to the vessel through the coil 11 and out through the coil 12. Articles are brought into the vapour in the vessel on the conveyer, are heated by condensation thereon of the vapour and then are conveyed out of the vessel. In a modification a wall 15, Fig. 3, is provided in the apparatus of Fig. 2 and a wave or fountain 16 of solder is generated within the wall, the molten solder of the wave being at a temperature above the boiling point of the liquid 4 which is above the melting point of the solder. Articles are conveyed into the vessel each being preheated by the vapour condensing thereon to a temperature above the melting point of a protective coating of solder thereon the preheated article then enters the wave of solder which provides solder for the article and the article leaving the wave carries molten solder which flows due to surface tension effects. The articles finally leave through the cooling coil 12. The liquid 4 may have a boiling point below the melting point of the solder. In a further embodiment a vessel 1a, Fig. 5 has a heating coil 2a, a first set of cooling coils 53 within the vessel and a second set of cooling coils 54 adjacent the upper end of the vessel and operating at a lower temperature than the first set of coils. A trough 55 receives condensate dripping from the coils 53 and a trough 57 receives condensate dripping from the coils 54. The condensate from trough 57 is discharged to trough 55 which discharges into the lower part of the vessel and a make up tank 73 is connected to the trough 55. A mixture of two liquids, one having a boiling point at atmospheric pressure at least equal to the melting point of the solder and a vapour which is denser than air at atmospheric pressure and the other having a boiling point at atmospheric pressure lower than that of the first liquid and a vapour which is less dense than that of the first liquid, is boiled in the vessel. The second liquid boils off first and then the first liquid boils and its denser vapour pushes the vapour of the second liquid above it to form a vapour blanket. The denser vapour extends to about the line 70 a mixture of lighter and denser vapour exists between lines 70 and 71 and lighter vapour exists up to line 72. A printed circuit board 77 is lowered into the vessel and held in the denser vapour where this condenses to heat the board to the melting point of its solder. The first liquid may be a fluorocarbon, e.g. fluorinated polyoxypropylene and the second may be a halogenated hydrocarbon, e.g. trichloro-trifluoroethane. Modifications of the apparatus shown in Figs. 2 and 3 are included in which the single cooling coils in the inlet and outlet conduits are replaced by the dual system described with reference to Fig. 5 using a mixture of liquids in the vessel.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US395310A US3866307A (en) | 1973-09-07 | 1973-09-07 | Method for soldering, fusing or brazing |
US476343A US3904102A (en) | 1974-06-05 | 1974-06-05 | Apparatus and method for soldering, fusing or brazing |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1484604A true GB1484604A (en) | 1977-09-01 |
Family
ID=27015058
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3858474A Expired GB1484604A (en) | 1973-09-07 | 1974-09-04 | Methods and apparatus for vapour heating of articles |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5340934B2 (en) |
AU (1) | AU7293274A (en) |
BR (1) | BR7407403D0 (en) |
DE (1) | DE2442180C3 (en) |
ES (1) | ES449417A1 (en) |
FR (1) | FR2243045B1 (en) |
GB (1) | GB1484604A (en) |
IT (1) | IT1020737B (en) |
NL (1) | NL163732C (en) |
SE (1) | SE424518B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2120964A (en) * | 1982-03-25 | 1983-12-14 | Alpha Metals | Processes of applying solder |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4115601A (en) * | 1977-07-01 | 1978-09-19 | Bell Telephone Laboratories, Incorporated | Flexible circuit reflow soldering process and machine |
US4389797A (en) * | 1981-06-23 | 1983-06-28 | The Htc Corporation | Continuous vapor processing system |
FR2537912A1 (en) * | 1982-12-21 | 1984-06-22 | Annemasse Ultrasons | Process for stabilising, in a steady state, the separation front between an upper vapour region and a lower vapour region which are created in an apparatus comprising a vessel, apparatus making use of the said process and use of the said apparatus |
FR2556083B1 (en) * | 1983-10-11 | 1986-04-25 | Piezo Ceram Electronique | IMPROVED MACHINE FOR HEATING AN ARTICLE OR PRODUCT BY CONDENSATION OF STEAM THEREON |
US4541358A (en) * | 1983-11-28 | 1985-09-17 | The Htc Corporation | Method and apparatus for solder removal |
CA1241236A (en) * | 1984-05-25 | 1988-08-30 | Donald J. Spigarelli | Continuous solder system |
DE3673880D1 (en) * | 1985-06-08 | 1990-10-11 | Nippon Dennetsu Keiki Kk | STEAM PHASE SOLDERING DEVICE. |
DE3619964C1 (en) * | 1986-06-13 | 1987-03-12 | Heraeus Gmbh W C | Device for melting a solder by vapor phase treatment |
DE3813931C2 (en) * | 1988-04-25 | 1995-05-04 | Resma Gmbh Fuegetechnik Indust | Inert gas soldering method and device for carrying out this method |
DE3814870C1 (en) * | 1988-05-02 | 1989-11-16 | Helmut Walter 8900 Augsburg De Leicht | |
DE3915040A1 (en) * | 1989-05-08 | 1990-11-15 | Helmut Walter Leicht | Vapour-phase esp. soldering unit for e.g. PCB - involves controlled stepwise or continuous preheating and/or cooling with immersion of workpieces in vapour phase region |
DE8913226U1 (en) * | 1989-11-08 | 1989-12-21 | Leicht, Helmut Walter, 8900 Augsburg, De | |
DE4024181C1 (en) * | 1990-07-30 | 1992-02-13 | Siemens Nixdorf Informationssysteme Ag, 4790 Paderborn, De | Vapour phase soldering installation - has valve in by=pass opening in dependence on preset temp. of sec. medium in soldering tank |
DE4103098C1 (en) * | 1991-02-01 | 1992-06-25 | Helmut Walter 8901 Koenigsbrunn De Leicht | |
DE4342634A1 (en) * | 1993-12-14 | 1995-06-22 | Helmut Walter Leicht | Device for heat transfer, especially in a convection soldering system |
DE4432774C2 (en) * | 1994-09-15 | 2000-04-06 | Fraunhofer Ges Forschung | Process for producing meniscus-shaped solder bumps |
DE19508402C2 (en) * | 1995-03-09 | 1998-08-20 | Helmut W Leicht | Vapor phase soldering system |
DE19519188C2 (en) * | 1995-05-24 | 2001-06-28 | Fraunhofer Ges Forschung | Method and device for wave and / or vapor phase soldering of electronic assemblies |
-
1974
- 1974-08-28 SE SE7410907A patent/SE424518B/en not_active IP Right Cessation
- 1974-09-03 NL NL7411686A patent/NL163732C/en not_active IP Right Cessation
- 1974-09-03 DE DE19742442180 patent/DE2442180C3/en not_active Expired
- 1974-09-03 AU AU72932/74A patent/AU7293274A/en not_active Expired
- 1974-09-04 GB GB3858474A patent/GB1484604A/en not_active Expired
- 1974-09-05 BR BR740374A patent/BR7407403D0/en unknown
- 1974-09-06 FR FR7430363A patent/FR2243045B1/fr not_active Expired
- 1974-09-06 IT IT6971074A patent/IT1020737B/en active
- 1974-09-07 JP JP10253574A patent/JPS5340934B2/ja not_active Expired
-
1976
- 1976-07-01 ES ES449417A patent/ES449417A1/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2120964A (en) * | 1982-03-25 | 1983-12-14 | Alpha Metals | Processes of applying solder |
Also Published As
Publication number | Publication date |
---|---|
BR7407403D0 (en) | 1975-09-09 |
NL7411686A (en) | 1975-03-11 |
AU7293274A (en) | 1976-03-11 |
IT1020737B (en) | 1977-12-30 |
SE424518B (en) | 1982-07-26 |
ES449417A1 (en) | 1977-11-01 |
JPS5340934B2 (en) | 1978-10-30 |
SE7410907L (en) | 1975-03-08 |
DE2442180B2 (en) | 1979-04-26 |
FR2243045B1 (en) | 1979-08-03 |
FR2243045A1 (en) | 1975-04-04 |
DE2442180C3 (en) | 1979-12-20 |
DE2442180A1 (en) | 1975-03-13 |
NL163732C (en) | 1980-10-15 |
JPS5054552A (en) | 1975-05-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PE20 | Patent expired after termination of 20 years |
Effective date: 19940903 |