Apparatus and method for recycling of dross in a soldering...

Details Apparatus and method for recycling of dross in a soldering... Apparatus and method for recycling of dross in a soldering...

2005-09-13

2005-09-13

Smith, Duane (Department: 1724)

Liquid purification or separation

With heater or heat exchanger

C210S179000, C210S205000, C210S776000, C210S767000, C228S034000, C228S056200, C228S037000, C228S214000, C134S093000, C134S105000

Reexamination Certificate

active

06942791

ABSTRACT:
An apparatus and method for eliminating dross in a solder pot of a soldering machine by converting the dross into usable solder. The conversion apparatus is comprised of an impeller, a shroud, an electric motor for driving the impeller, a vacuum source operatively connected to the shroud, an arrangement of guides immersed in the solder pot for recirculating liquid solder and a chemical de-oxidizing agent. The impeller and shroud are adjacent to a free surface of the dross which forms at the top portion of the liquid solder. The method includes the steps of adding a measured amount of de-oxidizing agent to the solder pot, agitating and recirculating the liquid solder/de-oxidizer mixture with the impeller to break-up the dross into smaller particles and separate the solder from the dross, and removing a residue of the dross by suction as the recirculating mixture passes beneath the shroud.

REFERENCES:
patent: 5240169 (1993-08-01), Gileta
patent: 5345056 (1994-09-01), Frei et al.
patent: 5616424 (1997-04-01), Carey et al.
patent: 6080497 (2000-06-01), Carey et al.
patent: 6214218 (2001-04-01), Kawashima et al.
patent: 6235208 (2001-05-01), Kawashima et al.

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