WO1999029462A2 - Gas circulation system, especially for soldering systems - Google Patents
Gas circulation system, especially for soldering systems Download PDFInfo
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- WO1999029462A2 WO1999029462A2 PCT/EP1998/007796 EP9807796W WO9929462A2 WO 1999029462 A2 WO1999029462 A2 WO 1999029462A2 EP 9807796 W EP9807796 W EP 9807796W WO 9929462 A2 WO9929462 A2 WO 9929462A2
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- WIPO (PCT)
- Prior art keywords
- gas
- gas stream
- crossbar
- branch
- gas branch
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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
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
- B23K1/203—Fluxing, i.e. applying flux onto surfaces
-
- 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
-
- 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
- B23K3/082—Flux dispensers; Apparatus for applying flux
Definitions
- the invention relates to a gas circulation system in which a heated gas stream with vaporized auxiliary materials, in particular fluxes of a soldering system, circulates.
- a gas circulation system in which a heated gas stream with vaporized auxiliary materials, in particular fluxes of a soldering system, circulates.
- it is a circulating air system that guides an air flow.
- Such systems are used in soldering systems e.g. used for preheating circuit boards to be soldered and for soldering these circuit boards.
- Fluxes e.g. Rosin, required, which evaporate and are transported by the gas stream through the entire system in circulation. This results in the inevitable effect that the fluxes to be regarded as volatilized auxiliaries precipitate in exposed points in the system and thus contaminate them.
- the object of the invention is to separate out volatilized auxiliaries in such a gas circulation system which are carried along by the heated gas stream.
- the system is designed in such a way that a deflection part projects into the gas flow, that a gas branch receives from the incident gas flow via directional inputs and feeds the gas flow again via outputs which are directed away from the inputs, the deflection part a connecting path between the inputs and the outputs for the gas branch, which contains a cooler and a catch basin for from the Has excipients excreted gas branch.
- a certain portion namely the gas branch, is continuously derived from the circulating gas flow by means of the deflecting part and is subjected to cooling in the deflecting part, on the basis of which the carried auxiliary substances are separated out. It is ensured by the design of the deflecting part that the gas branch discharged from it cannot intersect with the gas stream directed at the inputs, thereby preventing the air branch emitted from the outputs from reaching the inputs again over a short distance. In this way it is achieved that a certain part is continuously branched off from the circulating gas flow, from which the auxiliary substances are then continuously separated, which results in a constant cleaning of the circulating gas flow.
- the deflecting part is expediently provided with a crossbar crossing a gas flow, on one long side of which the gas flow strikes and the other long side of which emits the gas branch.
- the crossbar forms a kind of barrier for the gas flow, so that it is automatically guided into the deflection part.
- a favorable guide for the gas branch and the design of the collecting basin is obtained if one includes the collecting basin, which is essentially V-shaped in cross section, around the leg of the gas branch is guided in such a way that after flowing around the outside of the one leg the gas branch between the legs is directed in the direction of the bottom of the collecting basin and then over the outside of the other leg. Due to this design, there is an outside flow around the legs of the V-shaped collecting basin and one in the area between the legs Swirling of the gas branch, which is conducive to the excretion of the vaporized auxiliary substances, so that they can collect at the bottom of the V-shaped design. It is advantageous to arrange the cooler in the area between the legs, which is flushed on both sides by the gas branch because of the legs of the V-shaped design that surround it on the sides and can act on the latter in the sense of a rapid elimination of the auxiliary substances.
- a convenient guidance of the gas branch in the crossbar is obtained if the crossbar is essentially rectangular in cross section, which projects into the gas stream with a longitudinal edge in such a way that the gas stream strikes an inclined surface adjacent to the longitudinal edge and has the inputs and the gas branch emerges from the adjacent inclined surface of the crossbar, which has outlets, the crossbar being penetrated by inlet channels and outlet channels such that the inlet channels and outlet channels alternate in the longitudinal direction of the crossbar and cross with respect to their direction. Due to this design, there is an automatic introduction to the inputs in the crossbar for the gas flow, without special measures being required for this introduction, whereby the guidance of the gas branch in the crossbar ensures that the gas branch on the side of the input remote from the inputs Crossbar emerges again.
- Figure 1 shows a gas circulation system, which is the basis of a reflow soldering system, in which a heated gas flow for
- Heating of solder joints of a circuit board, not shown, is produced, the reflow system being equipped with the deflecting part which receives the gas branch (shown enlarged),
- Figure 2 is a plan view of the crossbar of the deflecting part with its
- FIG. 1 shows a gas circulation system, which is formed here by a component of a reflow soldering system. In this system, circulating air is heated, which then serves as an air stream to solder printed circuit boards guided through the system in a known manner. The circuit boards are not shown in FIG. 1. Another suitable gas can be used instead of air.
- the system is enclosed by the housing 1 with the bottom 2 and the side walls 3 and 4, the two openings 5 and 6 are inserted just above the bottom 2, which serve for the passage of circuit boards, not shown, to be treated.
- the air flow indicated by the arrows is from the paddle wheel 7 in a known manner Generated, which presses with its blades 8 into the impeller 7 air into the pressure channel 9, at the right end of which the heater 10 is arranged, which heats the air stream impinging on it.
- the heated air flow then enters the wedge channel 11, from which the heated air is introduced into the slots 12 between air conductors 13, which are box-shaped in cross section, in order to then meet a circuit board, not shown, which is longitudinally below the slots 12.
- the air stream emerging from the slots 12 is then deflected above the base 2 in the direction of the paddle wheel 7 in order to be fed again to the pressure channel 9, so that there is a circulating air stream which is continuously heated by the heater 10.
- the heated, circulating air is automatically contaminated by the evaporation of auxiliary materials during operation of the system.
- auxiliaries are normally part of the solder used in reflow soldering, which is applied to the solder joints beforehand.
- the auxiliaries, in particular the fluxes also evaporate, which are then carried away by the circulating air stream and are constantly carried in the circulating air system.
- auxiliary substances settle over time in any exposed locations, in particular cooler locations, of the system and thus contaminate them over time, which leads to the entire system being decommissioned.
- the deflection part 14 In the area of the pressure channel 9, the deflection part 14 is arranged that projects with the crossbar 15 into the air flow guided in the pressure channel 9. It has the inputs 16 on its side to which the air flow is applied. On the side of the crossbar 15 facing away from the inputs 16, the latter has the outputs 17. Because of this design, the air flow conducted in the pressure channel 9 presses through the inputs 16 into the interior of the deflection part 14, namely as part of the air flow, namely as with the smaller ones Arrows indicated air branch. In its interior, the deflection part 14 has the V-shaped collecting basin 18, in which the two legs 19 and 20 converge in the base 21 of the V-shaped design.
- the crossbar is square in cross section. In it run behind the inputs 16 and the outputs 17 input channels 30 and output channels, which are shown in a more visible manner in FIG.
- FIG. 2 shows a plan view of the longitudinal edge 29 of the crossbar 15 projecting into the pressure channel 9, which is shown only in FIG. 2.
- the air flow guided in the pressure channel 9 hits the inputs 16 and thus runs within the crossbar 15 through the input channels 30.
- the outputs 17 to which the output channels 31 lead open.
- Input channels 30 and output channels 31 alternate along the crossbar 15, the directions of the input channels 30 and the output channels 31 crossing, as can be seen in FIG. 1 clearly results.
- the V-shaped collecting basin 18 with its legs 19 and 20 is mounted here on rods, not shown, which protrude into the bores 32, 33 and 34. These bores allow the catch basin 18 to be pulled out of the deflection part 14 in the longitudinal direction thereof in order to be able to clean it from time to time. After cleaning, it can then be pushed back into the deflection part 14.
- housing 26 cooling channels floor 27 drops walls 28 cooling rib walls 29 longitudinal edges openings 30 input channel openings 31 output channel paddle wheel 32 holes blade 33 holes pressure channel 34 holes heater wedge channel slot box-shaped air duct deflection part crossbeams input channel output channel collecting basin leg leg base end end cooler wall
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- Engineering & Computer Science (AREA)
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- Electric Connection Of Electric Components To Printed Circuits (AREA)
Abstract
Description
Gaszirkulationsanlage, insbesondere für Lötanlagen Gas circulation system, in particular for soldering systems
Die Erfindung bezieht sich auf eine Gaszirkulationsanlage, in der ein erhitzter Gasstrom mit verdampften Hilfsstoffen, insbesondere Flußmitteln einer Lötanlage, zirkuliert. Insbesondere handelt es sich dabei um eine, einen Luftstrom führende Umluftanlage.The invention relates to a gas circulation system in which a heated gas stream with vaporized auxiliary materials, in particular fluxes of a soldering system, circulates. In particular, it is a circulating air system that guides an air flow.
Derartige Anlagen werden in Lötanlagen z.B. zum Vorheizen von zu verlötenden Leiterplatten und zum Verlöten dieser Leiterplatten verwendet. Für das Verlöten sind dabei Flußmittel, z.B. Kollophonium, erforderlich, die dabei verdampfen und von dem Gasstrom durch die gesamte Anlage im Umlauf hindurchtransportiert werden. Dabei ergibt sich der unvermeidbare Effekt, daß die als verflüchtigte Hilfsstoffe anzusprechenden Flußmittel sich an exponierten Stellen in der Anlage niederschlagen und diese somit verschmutzen.Such systems are used in soldering systems e.g. used for preheating circuit boards to be soldered and for soldering these circuit boards. Fluxes, e.g. Rosin, required, which evaporate and are transported by the gas stream through the entire system in circulation. This results in the inevitable effect that the fluxes to be regarded as volatilized auxiliaries precipitate in exposed points in the system and thus contaminate them.
Der Erfindung liegt die Aufgabe zugrunde, in einer solchen Gaszirkulationsanlage verflüchtigte Hilfsstoffe, die von dem erhitzten Gasstrom mitgeführt werden, aus diesem ausgeschieden werden. Um dies zu erreichen, ist die Anlage derart gestaltet, daß in den Gasstrom ein Umlenkteil hineinragt, daß aus dem auftreffenden Gasstrom über gerichtete Eingänge einen Gasabzweig aufnimmt und über Ausgänge, die von den Eingängen weg gerichtet sind, dem Gasstrom wieder zuführt, wobei das Umlenkteil eine Verbindungsstrecke zwischen den Eingängen und den Ausgängen für den Gasabzweig enthält, der einen Kühler und ein Auffangbecken für aus dem Gasabzweig ausgeschiedene Hilfsstoffe aufweist.The object of the invention is to separate out volatilized auxiliaries in such a gas circulation system which are carried along by the heated gas stream. In order to achieve this, the system is designed in such a way that a deflection part projects into the gas flow, that a gas branch receives from the incident gas flow via directional inputs and feeds the gas flow again via outputs which are directed away from the inputs, the deflection part a connecting path between the inputs and the outputs for the gas branch, which contains a cooler and a catch basin for from the Has excipients excreted gas branch.
Aufgrund dieser Gestaltung wird aus dem umlaufenden Gasstrom ständig ein gewisser Anteil, nämlich der Gasabzweig, mittels des Umlenkteils abgeleitet und im Umlenkteil einer Kühlung unterzogen, aufgrund deren sich eine Ausscheidung der mitgeführten Hilfsstoffe ergibt. Dabei wird durch die Gestaltung des Umlenkteils dafür gesorgt, daß der von diesem abgegebene Gasabzweig sich nicht mit dem auf die Eingänge gerichteten Gasstrom kreuzen kann, wodurch verhindert wird, daß der von den Ausgängen abgegebene Luftabzweig auf kurzem Wege direkt wieder zu den Eingängen gelangt. Auf diese Weise wird erreicht, daß aus dem umlaufenden Gasstrom ständig ein gewisser Teil abgezweigt wird, aus dem dann die Hilfsstoffe kontinuierlich ausgeschieden werden, womit sich eine ständige Reinigung des umlaufenden Gasstroms ergibt.Because of this design, a certain portion, namely the gas branch, is continuously derived from the circulating gas flow by means of the deflecting part and is subjected to cooling in the deflecting part, on the basis of which the carried auxiliary substances are separated out. It is ensured by the design of the deflecting part that the gas branch discharged from it cannot intersect with the gas stream directed at the inputs, thereby preventing the air branch emitted from the outputs from reaching the inputs again over a short distance. In this way it is achieved that a certain part is continuously branched off from the circulating gas flow, from which the auxiliary substances are then continuously separated, which results in a constant cleaning of the circulating gas flow.
Das Umlenkteil versieht man zweckmäßig mit einem Gasstrom kreuzenden Querbalken, auf dessen eine Längsseite der Gasstrom auftrifft und dessen andere Längsseite den Gasabzweig abgibt. Der Querbalken bildet dabei eine Art Barriere für den Gasstrom, so daß dieser automatisch in das Umlenkteil hineingeleitet wird.The deflecting part is expediently provided with a crossbar crossing a gas flow, on one long side of which the gas flow strikes and the other long side of which emits the gas branch. The crossbar forms a kind of barrier for the gas flow, so that it is automatically guided into the deflection part.
Eine günstige Führung für den Gasabzweig und die Gestaltung des Auffangbeckens ergibt sich dann, wenn man in die Verbindungsstrecke das im Querschnitt im wesentlichen V-förmig gestaltete Auffangbecken einbezieht, um dessen Schenkel der Gasabzweig derart geführt ist, daß nach dem Umströmen der Außenseite des einen Schenkel der Gasabzweig zwischen den Schenkeln in Richtung auf deren des Auffangbecken bildenden Grund und danach über die Außenseite des anderen Schenkels geleitet wird. Aufgrund dieser Gestaltung ergibt sich ein außenseitiges Umströmen der Schenkel des V-förmigen Auffangbeckens und im Bereich zwischen den Schenkeln eine Verwirbelung des Gasabzweigs, was der Ausscheidung der verdampften Hilfsstoffe förderlich ist, so daß sich diese am Grund der V-förmigen Gestaltung sammeln können. Vorteilhaft ordnet man dabei im Bereich zwischen den Schenkeln den Kühler an, der wegen der ihn seitlich umfassenden Schenkel der V-förmigen Gestaltung beidseitig von dem Gasabzweig umspült wird und dabei auf diesem im Sinne einer schnellen Ausscheidung der Hilfsstoffe einwirken kann.A favorable guide for the gas branch and the design of the collecting basin is obtained if one includes the collecting basin, which is essentially V-shaped in cross section, around the leg of the gas branch is guided in such a way that after flowing around the outside of the one leg the gas branch between the legs is directed in the direction of the bottom of the collecting basin and then over the outside of the other leg. Due to this design, there is an outside flow around the legs of the V-shaped collecting basin and one in the area between the legs Swirling of the gas branch, which is conducive to the excretion of the vaporized auxiliary substances, so that they can collect at the bottom of the V-shaped design. It is advantageous to arrange the cooler in the area between the legs, which is flushed on both sides by the gas branch because of the legs of the V-shaped design that surround it on the sides and can act on the latter in the sense of a rapid elimination of the auxiliary substances.
Eine zweckmäßige Führung des Gasabzweigs in dem Querbalken ergibt sich, wenn der Querbalken im Querschnitt im wesentlichen rechteckig ausgebildet ist, der mit einer Längskante in den Gasstrom derart hineinragt, daß der Gasstrom auf eine, neben der Längskante liegende, die Eingänge aufweisende schräge Fläche auftrifft und der Gasabzweig aus der benachbarten, die Ausgänge aufweisenden schrägen Fläche des Querbalkens austritt, wobei der Querbalken von Eintrittskanälen und Ausgangskanälen derart durchsetzt ist, daß in Längsrichtung des Querbalkens die Eintrittskanäle und Ausgangskanäle sich abwechseln und hinsichtlich ihrer Richtung kreuzen. Aufgrund dieser Gestaltung ergibt sich für den Gasstrom eine automatische Einführung in die Eingänge in den Querbalken, ohne daß für diese Einleitung besondere Maßnahmen erforderlich sind, wobei durch die Führung des Gasabzweigs im Querbalken dafür gesorgt wird, daß der Gasabzweig auf der den Eingängen abgewandten Seite des Querbalken wieder austritt. Aufgrund der in Längsrichtung des Querbalkens abwechselnden Anordnung der betreffenden Eintrittskanäle und Austrittskanäle und deren hinsichtlich ihrer Richtung sich kreuzende Anordnung stören sich weder die Eingänge noch die Ausgänge bzw. die Eintrittskanäle und Austrittskanäle, so daß der Gasabzweig in günstiger Weise durch den Querbalken geleitet werden kann.A convenient guidance of the gas branch in the crossbar is obtained if the crossbar is essentially rectangular in cross section, which projects into the gas stream with a longitudinal edge in such a way that the gas stream strikes an inclined surface adjacent to the longitudinal edge and has the inputs and the gas branch emerges from the adjacent inclined surface of the crossbar, which has outlets, the crossbar being penetrated by inlet channels and outlet channels such that the inlet channels and outlet channels alternate in the longitudinal direction of the crossbar and cross with respect to their direction. Due to this design, there is an automatic introduction to the inputs in the crossbar for the gas flow, without special measures being required for this introduction, whereby the guidance of the gas branch in the crossbar ensures that the gas branch on the side of the input remote from the inputs Crossbar emerges again. Due to the alternating arrangement of the respective inlet channels and outlet channels in the longitudinal direction of the crossbar and their arrangement crossing with respect to their direction, neither the entrances nor the outputs or the inlet channels and outlet channels are disturbed, so that the gas branch can be passed through the crossbar in a favorable manner.
Um eine gelegentliche Reinigung des Auffangbeckens problemlos zu ermöglichen, ordnet man dieses vorteilhaft im Querbalken längs verschiebbar und aus diesem ausfahrbar an. Hierdurch ist es möglich, das Auffangbecken aus dem Querbalken herauszunehmen und zu reinigen, bzw. durch ein vorher bereits gereinigtes Auffangbecken zu ersetzen, wodurch der Betrieb der Anlage praktisch ohne Unterbrechnung durchgeführt werden kann.In order to enable occasional cleaning of the catch basin without problems, it is advantageously arranged longitudinally in the crossbar and extendable from this. This makes it possible to remove the catch basin from the crossbar and to clean it, or to replace it with a previously cleaned catch basin, which means that the system can be operated practically without interruption.
In den Figuren ist ein Ausführungsbeispiel der Erfindung dargestellt. Es zeigen:An exemplary embodiment of the invention is shown in the figures. Show it:
Figur 1 eine Gaszirkulationsanlage, die hier einer Reflow-Lötanlage zugrunde gelegt ist, in der ein erhitzter Gasstrom zurFigure 1 shows a gas circulation system, which is the basis of a reflow soldering system, in which a heated gas flow for
Aufheizung von Lötstellen einer nicht dargestellten Leiterplatte erzeugt wird, wobei die Reflowanlage mit dem den Gasabzweig aufnehmenden Umlenkteil (vergrößert gezeichnet) ausgestattet ist,Heating of solder joints of a circuit board, not shown, is produced, the reflow system being equipped with the deflecting part which receives the gas branch (shown enlarged),
Figur 2 eine Draufsicht auf den Querbalken des Umlenkteil mit seinenFigure 2 is a plan view of the crossbar of the deflecting part with its
Eingängen und Ausgängen.Entrances and exits.
In der Figur 1 ist eine Gaszirkulationsanlage dargestellt, die hier durch ein Bestandteil einer Reflow-Lötanlage gebildet wird. In dieser Anlage wird zirkulierende Luft erhitzt, die dann als Luftstrom dazu dient, durch die Anlage geführte Leiterplatten in bekannter Weise zu verlöten. Die Leiterplatten sind in der Fig. 1 nicht dargestellt. Anstelle von Luft kann auch ein anderes geeignetes Gas verwendet werden.1 shows a gas circulation system, which is formed here by a component of a reflow soldering system. In this system, circulating air is heated, which then serves as an air stream to solder printed circuit boards guided through the system in a known manner. The circuit boards are not shown in FIG. 1. Another suitable gas can be used instead of air.
Die Anlage wird von dem Gehäuse 1 mit dem Boden 2 und den Seitenwänden 3 und 4 umschlossen, die dicht oberhalb des Bodens 2 die beiden Öffnungen 5 und 6 eingelassen sind, die für den Durchtritt nicht dargestellter zu behandelnder Leiterplatten dienen. Der durch die Pfeile angedeutete Luftstrom wird von dem Schaufelrad 7 in bekannter Weise erzeugt, das mit seinen Schaufeln 8 in das Schaufelrad 7 eingetretene Luft in den Druckkanal 9 hineindrückt, an dessen rechten Ende der Heizer 10 angeordnet ist, der den auf ihn auftreffenden Luftstrom erhitzt. Der erhitzte Luftstrom gelangt dann in den Keilkanal 11, von dem aus die erhitzte Luft in die Schlitze 12 zwischen im Querschnitt kastenförmige Luftleiter 13 eingeführt wird, um danach auf eine nicht dargestellte, unterhalb der Schlitze 12 längsgeführte Leiterplatte zu treffen. Der aus den Schlitzen 12 austretende Luftstrom wird dann oberhalb des Bodens 2 in Richtung auf das Schaufelrad 7 umgelenkt, um wieder dem Druckkanal 9 neu zugeführt zu werden, so daß sich ein zirkulierender Luftstrom ergibt, der ständig von dem Heizer 10 aufgeheizt wird. In einer derartigen Umluftanlage wird die erhitzte, zirkulierende Luft im Betrieb der Anlage automatisch durch das Verdampfen von Hilfsstoffen kontaminiert. Diese Hilfsstoffe sind normalerweise Bestandteil des beim Reflow- Löten verwendeten Lots, das auf die Lötstellen vorab aufgetragen wird. Beim Aufschmelzen des Lots verdampfen auch die Hilfsstoffe, insbesondere die Flußmittel, die dann von dem zirkulierenden Luftstrom mitgerissen und ständig in der Umluftanlage mitgeführt werden. Wie bereits oben erwähnt, setzen sich derartige Hilfsstoffe im Laufe der Zeit an irgendwelchen exponierten Stellen, insbesondere kühlere Stellen, der Anlage ab und verschmutzen diese damit im Laufe der Zeit, was zur Außerbetriebnahme der ganzen Anlage führt.The system is enclosed by the housing 1 with the bottom 2 and the side walls 3 and 4, the two openings 5 and 6 are inserted just above the bottom 2, which serve for the passage of circuit boards, not shown, to be treated. The air flow indicated by the arrows is from the paddle wheel 7 in a known manner Generated, which presses with its blades 8 into the impeller 7 air into the pressure channel 9, at the right end of which the heater 10 is arranged, which heats the air stream impinging on it. The heated air flow then enters the wedge channel 11, from which the heated air is introduced into the slots 12 between air conductors 13, which are box-shaped in cross section, in order to then meet a circuit board, not shown, which is longitudinally below the slots 12. The air stream emerging from the slots 12 is then deflected above the base 2 in the direction of the paddle wheel 7 in order to be fed again to the pressure channel 9, so that there is a circulating air stream which is continuously heated by the heater 10. In such a circulating air system, the heated, circulating air is automatically contaminated by the evaporation of auxiliary materials during operation of the system. These auxiliaries are normally part of the solder used in reflow soldering, which is applied to the solder joints beforehand. When the solder melts, the auxiliaries, in particular the fluxes, also evaporate, which are then carried away by the circulating air stream and are constantly carried in the circulating air system. As already mentioned above, such auxiliary substances settle over time in any exposed locations, in particular cooler locations, of the system and thus contaminate them over time, which leads to the entire system being decommissioned.
Im Bereich des Druckkanals 9 ist das Umlenkteil 14 angeordnet, daß mit dem Querbalken 15 in den im Druckkanal 9 geführten Luftstrom hineinragt. Er weist auf seiner mit dem Luftstrom beaufschlagten Seite die Eingänge 16 auf. Auf der den Eingängen 16 abgewandten Seite des Querbalkens 15 besitzt dieser die Ausgänge 17. Aufgrund dieser Gestaltung drückt der im Druckkanal 9 geleitete Luftstrom über die Eingänge 16 in das Innere des Umlenkteils 14, und zwar als ein Teil des Luftstroms, nämlich als mit den kleineren Pfeilen angedeuteter Luftabzweig. In seinem Inneren besitzt das Umlenkteil 14 das V-förmig gestaltete Auffangbecken 18, bei dem die beiden Schenkel 19 und 20 im Grund 21 der V-förmigen Gestaltung zusammenlaufen. Zusammen mit den Querbalken 15 ergibt sich damit eine Verbindungsstrecke für den Luftabzweig, die von den Eingängen 16 entlang der Außenseite des Schenkels 19, dessen Ende 22 umrundend in Richtung auf den Grund 21 zu verläuft, von wo aus der Luftabzweig das Ende 23 des Schenkels 20 umrundet, an dessen Außenseite verläuft und dann zu dem Ausgang 17 gelangt. Zwischen den beiden Schenkeln 19 und 20 ist der in diesem Bereich hineinragende Kühler 24 angeordnet, der aus einem Vorsprung in der Wandung 25 des Umlenkteils 14 herausragt und die beiden Kühlkanäle 26 enthält, durch die irgendein bekanntes Kühlmedium strömt. Der den Kühler 24 umströmende Luftabzweig erhält somit eine ausreichende Kühlung, was zur Kondensation und Ausscheidung der Hilfsstoffe führt, die dann durch die angedeutete Tropfen 27 vom Kühler 24 abtropfen und sich in dem Auffangbecken 18 sammeln.In the area of the pressure channel 9, the deflection part 14 is arranged that projects with the crossbar 15 into the air flow guided in the pressure channel 9. It has the inputs 16 on its side to which the air flow is applied. On the side of the crossbar 15 facing away from the inputs 16, the latter has the outputs 17. Because of this design, the air flow conducted in the pressure channel 9 presses through the inputs 16 into the interior of the deflection part 14, namely as part of the air flow, namely as with the smaller ones Arrows indicated air branch. In its interior, the deflection part 14 has the V-shaped collecting basin 18, in which the two legs 19 and 20 converge in the base 21 of the V-shaped design. Together with the crossbeams 15, this results in a connecting path for the air branch, which runs from the entrances 16 along the outside of the leg 19, the end 22 of which runs around towards the bottom 21, from where the end 23 of the leg 20 extends from the air branch circled, runs on the outside and then comes to the exit 17. Between the two legs 19 and 20, the radiator 24 projecting in this area is arranged, which projects from a projection in the wall 25 of the deflection part 14 and contains the two cooling channels 26 through which some known cooling medium flows. The air branch flowing around the cooler 24 thus receives sufficient cooling, which leads to condensation and excretion of the auxiliary materials, which then drip from the cooler 24 through the indicated drops 27 and collect in the catch basin 18.
Bei dem im Figur 1 dargestellten Ausführungsbeispiel ist der Querbalken im Querschnitt quadratisch gestaltet. In ihm verlaufen jeweils hinter den Eingängen 16 und den Ausgängen 17 Eingangkanäle 30 und Ausgangskanäle, die in der Figur 2 besser sichtbar dargestellt sind.In the embodiment shown in Figure 1, the crossbar is square in cross section. In it run behind the inputs 16 and the outputs 17 input channels 30 and output channels, which are shown in a more visible manner in FIG.
Figur 2 zeigt eine Draufsicht auf die in den Druckkanal 9 hineinragende Längskante 29 des Querbalkens 15, der allein in Figur 2 dargestellt ist. Gemäß den eingezeichneten Pfeilen trifft der im Druckkanal 9 geführte Luftstrom auf die Eingänge 16 und verläuft damit innerhalb des Querbalkens 15 durch die Eingangskanäle 30. Auf der den Eingängen 16 gegenüber liegenden Seite münden die Ausgänge 17, zu denen die Ausgangskanäle 31 führen. Längs des Querbalkens 15 wechseln sich dabei Eingangskanäle 30 und Ausgangskanäle 31 ab, wobei sich die Richtungen der Eingangskanäle 30 und der Ausgangskanäle 31 kreuzen, wie sich dies aus der Figur 1 deutlich ergibt. Der gemäß Figur 1 in den Eingang 16 eintretende Luftstrom verläuft nämlich rechtwinklig zu dem aus dem Ausgang 17 austretenden Luftabzweig, wobei durch diese Ausrichtung der Strömung innerhalb des Querbalkens 15 und die Lage der Eingänge 16 und Ausgänge 17 dafür gesorgt wird, daß der aus dem Querbalken 15 austretende Luftabzweig von den Eingängen 16 weggerichtet ist. Auf diese Weise wird eine gegenseitige Behinderung der Luftströmungen im Bereich des Querbalkens 15 vermieden.FIG. 2 shows a plan view of the longitudinal edge 29 of the crossbar 15 projecting into the pressure channel 9, which is shown only in FIG. 2. According to the arrows shown, the air flow guided in the pressure channel 9 hits the inputs 16 and thus runs within the crossbar 15 through the input channels 30. On the side opposite the inputs 16, the outputs 17 to which the output channels 31 lead open. Input channels 30 and output channels 31 alternate along the crossbar 15, the directions of the input channels 30 and the output channels 31 crossing, as can be seen in FIG. 1 clearly results. The air flow entering the inlet 16 according to FIG. 1 runs at right angles to the air branch emerging from the outlet 17, this orientation of the flow within the crossbar 15 and the position of the inlets 16 and outlets 17 ensuring that the outflow from the crossbar 15 emerging air branch is directed away from the inputs 16. In this way, a mutual obstruction of the air flows in the region of the crossbar 15 is avoided.
Das V-förmig gestaltete Auffangbecken 18 mit seinen Schenkeln 19 und 20 ist hier auf nicht dargestellten Stangen gelagert, die in die Bohrungen 32,33 und 34 hineinragen. Diese Bohrungen erlauben es, das Auffangbecken 18 in Längsrichtung des Umlenkteils 14 aus diesem herauszuziehen, um es von Zeit zu Zeit reinigen zu können. Nach erfolgter Reinigung kann es dann wieder in das Umlenkteil 14 eingeschoben werden. The V-shaped collecting basin 18 with its legs 19 and 20 is mounted here on rods, not shown, which protrude into the bores 32, 33 and 34. These bores allow the catch basin 18 to be pulled out of the deflection part 14 in the longitudinal direction thereof in order to be able to clean it from time to time. After cleaning, it can then be pushed back into the deflection part 14.
B e z u g s z e i ch e nl i s t eB e u g s z e i ch e nl i s t e
Gehäuse 26 Kühlkanäle Boden 27 Tropfen Wände 28 Kühlrippen Wände 29 Längskanten Öffnungen 30 Eingangskanal Öffnungen 31 Ausgangskanal Schaufelrad 32 Bohrungen Schaufel 33 Bohrungen Druckkanal 34 Bohrungen Heizer Keilkanal Schlitz Kastenförmige Luftleiter Umlenkteil Querbalken Eingangskanal Ausgangskanal Auffangbecken Schenkel Schenkel Grund Ende Ende Kühler Wandung Housing 26 cooling channels floor 27 drops walls 28 cooling rib walls 29 longitudinal edges openings 30 input channel openings 31 output channel paddle wheel 32 holes blade 33 holes pressure channel 34 holes heater wedge channel slot box-shaped air duct deflection part crossbeams input channel output channel collecting basin leg leg base end end cooler wall
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19754015.5 | 1997-12-05 | ||
| DE1997154015 DE19754015A1 (en) | 1997-12-05 | 1997-12-05 | Gas circulation system, in particular for soldering systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| WO1999029462A2 true WO1999029462A2 (en) | 1999-06-17 |
| WO1999029462A3 WO1999029462A3 (en) | 1999-07-22 |
Family
ID=7850872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP1998/007796 Ceased WO1999029462A2 (en) | 1997-12-05 | 1998-12-01 | Gas circulation system, especially for soldering systems |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19754015A1 (en) |
| WO (1) | WO1999029462A2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008140397A1 (en) * | 2007-05-11 | 2008-11-20 | Esab Ab | Device and method for powder handling for welding apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10108023C2 (en) * | 2001-02-19 | 2003-04-17 | Air Liquide Gmbh | Process for soldering under a protective gas atmosphere and soldering device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL9200498A (en) * | 1992-03-17 | 1993-10-18 | Soltec Bv | SOLDERING DEVICE FILTERED. |
| DE4242820A1 (en) * | 1992-12-17 | 1994-06-23 | Linde Ag | Soldering process with exhaust gas cleaning |
| DE4416959C2 (en) * | 1994-05-13 | 2003-10-02 | Seho Systemtechnik Gmbh | Reflow soldering system |
| US5611476C1 (en) * | 1996-01-18 | 2002-02-26 | Btu Int | Solder reflow convection furnace employing flux handling and gas densification systems |
-
1997
- 1997-12-05 DE DE1997154015 patent/DE19754015A1/en not_active Withdrawn
-
1998
- 1998-12-01 WO PCT/EP1998/007796 patent/WO1999029462A2/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008140397A1 (en) * | 2007-05-11 | 2008-11-20 | Esab Ab | Device and method for powder handling for welding apparatus |
| US9492881B2 (en) | 2007-05-11 | 2016-11-15 | Esab Ab | Device and method for powder handling for welding apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1999029462A3 (en) | 1999-07-22 |
| DE19754015A1 (en) | 1999-06-10 |
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