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Method for coating soldering surface of soldering lug/soldering ring with soldering flux

A technology of surface coating and flux, which is applied in the field of solder manufacturing, can solve problems such as health hazards for operators, complex procedures, and environmental pollution, and achieve the effects of high controllability of coating thickness, stable adhesion, and simple process

Active Publication Date: 2021-12-17
ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Types (1) and (2) both use liquid flux, and most liquid fluxes contain volatile organic solvents, which are likely to cause environmental pollution and health hazards to operators. Although type (3) uses powder Shaped solid flux, which has high requirements for equipment and flux powder, complicated process, and high cost, these shortcomings restrict large-scale production and application

Method used

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  • Method for coating soldering surface of soldering lug/soldering ring with soldering flux
  • Method for coating soldering surface of soldering lug/soldering ring with soldering flux
  • Method for coating soldering surface of soldering lug/soldering ring with soldering flux

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Experimental program
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Effect test

Embodiment 1

[0033] This embodiment proposes a method for coating flux on the surface of a solder sheet, including the following steps:

[0034] (1), put the flux containing more than 90wt% rosin into a grinder and grind it into powder to obtain a flux powder containing rosin with a particle size of 200 μm;

[0035] (2), weigh the above-mentioned rosin-containing flux powder with a mass ratio of 2:98 and metal balls with a particle size of 0.6 mm, place them in a spin coater for the first spin coating, and the speed of the spin coater is controlled It is 180r / min, and the working time is 45min. After taking it out, a metal ball with a flux layer on the surface is obtained;

[0036] (3), then weigh the metal balls with a mass ratio of 100:3:30 above the surface coating flux layer, the flux powder containing rosin and the square soldering piece to be coated (thickness is 0.5mm, area is 50mm 2 ), put it in the spin coater for the second spin coating, the spin coater speed is controlled at 18...

Embodiment 2

[0040] This embodiment proposes a method for coating flux on the surface of a solder sheet, including the following steps:

[0041] (1), put the flux containing more than 90wt% rosin into a grinder and grind it into powder to obtain a flux powder containing rosin with a particle size of 100 μm;

[0042] (2), take by weighing the above-mentioned flux powder containing rosin and the metal ball that particle diameter is 1mm that mass ratio is 1:99, place in spin coater and carry out spin coating for the first time, the rotating speed control of spin coater is 150r / min, working time is 60min, after taking out, get the metal ball with flux layer on the surface;

[0043] (3), weigh again the above-mentioned metal balls with a mass ratio of 100:2:30 to coat the flux layer on the surface, the flux powder containing rosin and the circular soldering sheet to be coated (the thickness is 0.5mm, the area is not greater than 50mm 2 ), put it in the spin coater for the second spin coating,...

Embodiment 3

[0047] This embodiment proposes a method for coating flux on the surface of a solder sheet, including the following steps:

[0048] (1), put the flux containing more than 90wt% rosin into a grinder and grind it into powder to obtain a flux powder containing rosin with a particle size of 300 μm;

[0049] (2), weigh the above-mentioned rosin-containing flux powder with a mass ratio of 2:98 and metal balls with a particle size of 0.5 mm, place them in a spin coater for the first spin coating, and the speed of the spin coater is controlled It is 200r / min, and the working time is 30min. After taking it out, a metal ball with a flux layer on the surface is obtained;

[0050](3), then weigh the metal balls with a mass ratio of 100:5:30 above the surface coating flux layer, the flux powder containing rosin and the square soldering piece to be coated (thickness is 0.5mm, area is 50mm 2 ), placed in the spin coater for the second spin coating, the spin coater speed is controlled at 150...

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Abstract

The invention discloses a method for coating soldering the surface of a soldering lug / soldering ring with soldering flux. The method comprises the following steps that soldering flux powder and a metal ball are placed in a rotary coating device for first-time rotary coating to obtain the metal ball coated with the surface coated with a soldering flux layer; and the metal ball with the surface covered with the soldering flux layer, the soldering flux powder and the to-be-coated soldering lug / soldering ring are placed in the rotary coating device to be subjected to second-time rotary coating, and after the metal ball is separated out, the soldering lug / soldering ring with the surface coated with the soldering flux layer is obtained. The method for coating the surface of the soldering lug / soldering ring with the soldering flux has the characteristics that the coating thickness is uniform, the soldering flux is not prone to falling off, the technology is simple, environment protection and high efficiency are achieved, the cost is low and the like, and large-batch production of the coated soldering lugs can be achieved.

Description

technical field [0001] The invention belongs to the technical field of solder manufacture, and in particular relates to a method for coating flux on the surface of a solder piece / weld ring. Background technique [0002] Because the surface of the coated solder contains flux, it can also be made into precision-molded solder of different shapes and sizes according to requirements. It is widely used in the fields of printed board assembly, connectors and communication equipment, and micro-assembly welding. At present, there are usually three technologies for coating flux on the surface of soldering sheets: (1) liquid flux dipping process; (2) liquid flux spraying process; (3) flux powder electrostatic spraying. Types (1) and (2) both use liquid flux, and most liquid fluxes contain volatile organic solvents, which are likely to cause environmental pollution and health hazards to operators. Although type (3) uses powder Shaped solid flux, which has high requirements for equipmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K35/365B23K35/362
CPCB23K35/365B23K35/362
Inventor 钟海锋冯斌刘平吴剑平
Owner ZHEJIANG ASIA GENERAL SOLDERING & BRAZING MATERIAL