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Molten solder anti-oxidation activated powder

A melting solder and anti-oxidation technology, applied in the direction of welding/cutting media/materials, welding media, welding equipment, etc., can solve the problems of high cost, waste of resources, and unsatisfactory effects of nitrogen generators, so as to save equipment maintenance time, The effect of preventing the generation of tin slag and avoiding the loss of heat dissipation

Inactive Publication Date: 2013-12-25
李平荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1. Tin slag reduction powder, which is to reduce tin slag to solder, but in actual use, the effect is not ideal, the reduction rate is low, and the smell of smoke is strong, sometimes causing the whole workshop to be filled with smoke, and some even in use. A lot of sparks are generated on the surface of the tin slag, which may cause fire hazards and affect the physical and mental health and personal safety of employees
[0005] 2. Tin slag reduction machine is the only equipment on the market that purchases physical methods to reduce tin slag, and its reduction rate is relatively high. It is an after-event treatment, and the generation of tin slag cannot be controlled from the source. When using the tin slag reduction machine, the working temperature is high, consumes more electricity, and wastes resources. At the same time, when the tin slag reduction machine is used, a large For smoke and smell, it needs to be put in a separate workshop, which increases the cost
[0006] 3. Anti-oxidation reducing agent, liquid oily product, its anti-oxidation and reduction are good, but because it is liquid, it is easy to stick to the wave soldering equipment, making it difficult to clean and maintain, and at the same time, it has a large smoke and smell It is heavy and sometimes even sticks to the PCB board
[0007] 4. Installing a nitrogen device. The installation of a nitrogen device can not only control the generation of tin slag from the source, but also effectively improve the welding quality. However, the cost of using a nitrogen generator is high, and it is not economical to use in practice. unacceptable
However, the anti-oxidation powder currently on the market has a low melting point, large smog, and high halogen content, which is highly corrosive to wave soldering equipment and affects the efficiency and service life of wave soldering.
Even if the corroded wave soldering is repaired, it will still affect its heating performance, thus affecting its welding quality

Method used

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  • Molten solder anti-oxidation activated powder

Examples

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Effect test

Embodiment 1

[0036] An anti-oxidation active powder for molten solder, the main components of which are ammonium fluoroborate and silicon micropowder, the content of ammonium fluoroborate and silicon micropowder is more than 90%, and the silicon micropowder is coated on the surface of potassium ammonium fluoroborate. First add an appropriate amount of water or other solvents to the silica powder to make the silica powder viscous, then use coating equipment (or other methods) to evenly coat the surface of ammonium fluoroborate, and then dry (drying, etc. ) will do. Alternatively, add silicon micropowder solution to the reaction tank for producing ammonium fluoroborate, and dry the solution after crystallization in the reaction tank.

Embodiment 2

[0038] An anti-oxidation active powder for molten solder, its main components are sodium fluoroborate and silicon micropowder, the content of ammonium fluoroborate and silicon micropowder is more than 90%, and the silicon micropowder is coated on the surface of sodium fluoroborate. First add an appropriate amount of water or other solvents to the silica powder to make the silica powder viscous, then use coating equipment (or other methods) to evenly coat the surface of sodium fluoroborate, and then dry (drying, etc. ) will do. Or add silicon micropowder solution in the reaction tank of production and sodium fluoroborate, and wait for the solution in the reaction tank to crystallize and dry.

Embodiment 3

[0040]An anti-oxidation active powder for molten solder, the main components of which are ammonium chloride and silicon micropowder. Add an appropriate amount of water or other solvents to the microsilica powder to make the microsilica powder viscous, then use coating equipment (or other methods) to evenly coat the surface of ammonium chloride, and then dry (drying, etc.) That's it.

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Abstract

The invention discloses a molten solder anti-oxidation activated powder. The molten solder anti-oxidation activated powder comprises at least one of ammonium fluoborate, sodium fluoborate, potassium fluoborate, ammonium chloride and the like and silica micropowder which serve as main ingredients and account for over 90 percent, wherein the silica micropowder is coated on the surfaces of the ammonium fluoborate, the sodium fluoborate, the potassium fluoborate and the ammonium chloride. The anti-oxidation activated powder is a powdery or crystalline solid; during production, a thin layer of molten solder anti-oxidation activated powder is covered on the surface of molten solder, so that the molten solder can be effectively prevented from being contacted with oxygen in the air to reduce the oxidation of the molten solder, the using amount of the molten solder and the production cost; the wettability, the flowability and the activation property of a tin solder can be enhanced, and the quality of a product can be improved; and simultaneously, the corrosion to equipment is reduced, and the equipment is convenient to maintain.

Description

technical field [0001] The present invention relates to a molten solder anti-oxidation active powder, especially refers to the anti-oxidation of liquid metal solder (or tin alloy) and the reduction of tin slag, which can improve the activity of solder, assist in improving the welding quality of products, and more importantly, can Reduce corrosion to welding equipment. Its name can also be called brazing tin surfactant, solder anti-oxidation powder, anti-oxidation and reduction powder, etc. Background technique [0002] In industrial production, especially in the electronic assembly industry, liquid metal tin (or tin alloy) is often used for soldering. However, after the tin alloy changes from solid to liquid at high temperature, the high-temperature liquid tin alloy is extremely easy to oxidize with oxygen in the air to produce oxidized tin slag. In the contemporary electronic welding production process, wave soldering is the most commonly used welding equipment, with fast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K35/363
Inventor 李平荣
Owner 李平荣