Soldering apparatus with gas distribution system

B - Operations – Transporting – 23 – K

Patent

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Details

B23K 1/008 (2006.01)

Patent

CA 2308345

The invention relates to a gas distribution system which can be connected to a gas supply, the purpose of said gas distribution system being to admit and distribute a non- oxidising gas in a shroud (17, 20, 21, 23) covering at least one solder container (22). Printed circuit modules (12) are transported through said shroud and whilst they are being transported, are brought into contact with a wave of solder (24). The gas distribution system has at least one gas distributor situated above and at least one gas distributor (19, 31) situated below the printed circuit modules (12) in order to produce a protective gas atmosphere with low residual oxygen values. Both gas distributors are provided with flow elements (48, 49, 51 to 56, 59; 35, 37, 44, 45). Said flow elements produce a displacement gas blanket which is distributed homogeneously over the discharge surfaces (59, 44, 45) directed towards the solder container.

L'invention concerne un système de distribution de gaz se raccordant à une alimentation en gaz, la finalité de ce système de distribution de gaz étant d'admettre et de distribuer un gaz non oxydant dans une enveloppe (17, 20, 21,23) recouvrant au moins un réservoir de brasure (22). Des cartes de circuits imprimés (12) sont transportées à travers ladite enveloppe et, durant leur transport, sont mises en contact avec une vague de brasure (24). Le système de distribution de gaz comporte au moins un distributeur de gaz situé au-dessus des cartes de circuits imprimés (12) et au moins à un distributeur de gaz (19, 31) situé au-dessous de ces dernières, dans le but de produire une atmosphère inerte avec de faibles valeurs d'oxygène résiduel. Les deux distributeurs de gaz sont pourvus d'éléments d'écoulement (48, 49, à 56, 59; 35, 37, 44, 45). Ces éléments d'écoulement constituent une couche de gaz de déplacement qui est répartie de manière homogène sur les surfaces de sortie (59, 44, 45) orientées vers le réservoir de brasure.

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