Vorrichtung und Verfahren zur Entfernung von Lotkrätzen

• Main Author: MAWATARI, SHOHEI
• Format: Patent
• Language: German
• Published: 31.01.2008
• Subjects: CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; CHEMISTRY; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FERROUS OR NON-FERROUS ALLOYS; MACHINE TOOLS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; METALLURGY; PERFORMING OPERATIONS; PRETREATMENT OF RAW MATERIALS; PRINTED CIRCUITS; PRODUCTION AND REFINING OF METALS; SOLDERING OR UNSOLDERING; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; WELDING; WORKING BY LASER BEAM

A solder dross removal apparatus includes a holder (18) adapted to be pivotably mounted to a container (14) within which a pool of molten solder (16) is kept at preset temperature. Dross (44) is introduced into the container (14). A dross cutter assembly includes shafts (34) rotatably supported by the holder (18) and flat elongated cutter elements (36) mounted on the shafts (34). The cutter elements (36) are disposed perpendicular to the surface of the molten solder (16) and partly submerged in the molten solder when the container (14) is closed by the holder (18). The cutter elements (36) are angularly offset from each other so that each end of the cutter elements lies on a spiral path. The cutter elements (36) are rotated to repeatedly cut the dross into smaller pieces and force the dross as cut into the molten solder. This process removes oxides from the dross, and any free, reclaimed solder is returned to the molten solder.