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Solder recovery apparatus and method

A solder recycling and soldering technology, applied in auxiliary devices, welding equipment, manufacturing tools, etc., can solve toxic and other problems

Inactive Publication Date: 2018-09-11
EVS INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Finally, there is a significant risk of operator exposure to solvent fumes, which can be toxic

Method used

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  • Solder recovery apparatus and method
  • Solder recovery apparatus and method
  • Solder recovery apparatus and method

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Embodiment Construction

[0040] During soldering on an industrial scale, it is necessary to keep the solder bath heated and at regular intervals to scrape off the scum from the top of the bath, which consists mainly of oxides of tin and lead. However, up to 90% of the solder can be lost with dross. Good solder can be recovered from dross, and traditionally this is achieved by simply heating the dross. However, this is a relatively inefficient method and is not economical.

[0041] Scum is understood to consist of pockets of good solder surrounded by an envelope-like shell of tin and lead oxides (such as leaded solder) or other metal oxides (such as lead-free solder). In the prior art, when the dross is heated and compressed, the oxide shell ruptures and the liquid solder can escape. Additionally, any free solder in the dross removed from the solder bath will also be recovered.

[0042] In a modification of the prior art, the dross is heated and compressed by a piston. This will result in more reco...

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Abstract

The present invention provides an apparatus and method for reusing good solder recovered from dross. The scum is introduced into the heating chamber (108) where it is agitated by means such as an impeller (116). A vent valve (118), suitably thermally activated, vents the recovered solder. Waste material is collected by reversing the electrically rotating container.

Description

technical field [0001] The present invention relates to industrial soldering methods and apparatus, in particular to methods and apparatus for recovering solder from dross. Background technique [0002] In the field of industrial soldering, it is necessary to keep the solder bath heated and it is necessary at regular intervals to scrape off the scum from the top of the solder bath, which is mainly composed of tin and oxides of good solder. Scum generation is higher in tin-silver-copper alloys (lead-free solders) than in tin-lead solders (lead-containing solders). [0003] Dross collected from industrial soldering contains a large amount of usable solder and oxidation residue, which should be disposed of. However, with conventional solder recovery methods, the oxidized residues cannot be completely removed, and the oxidized residues still contain a large amount of solder. [0004] One traditional method of recovering solder from dross is by heating and stirring the heated r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K3/08
CPCB23K3/08C22B7/003Y02P10/20C22B7/04
Inventor 利马耶·阿图尔乔格·苏利达特西蒙·加尔弗·诺曼
Owner EVS INT
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