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In a sense, the wire and cable manufacturing industry is an industry
of material finishing and assembly.
First, the amount of materials used is huge, and the material cost in cable products accounts for 80-90% of the total manufacturing cost; Second, there are many types and varieties of materials used, and the performance requirements are particularly high, such as copper for conductors, the purity of copper is required to be more than 99.
95%, and some products should use oxygen-free high-purity copper; Third, the selection of materials will have a decisive impact
on the manufacturing process, product performance and service life.
Among them, the selection of copper wire is particularly important, if the slightest carelessness may cause safety accidents
.
Below, the editor will sort out some of the causes and treatment methods of yellow copper wire
.
Yellowing usually has several causes:
1.
The temperature of the tin furnace is too high and the fluidity is large, resulting in too large the pinhole of the plating and fast penetration of copper and tin
2.
The tin layer is too thin, and the copper and tin penetrate quickly
3.
There are too many flux halogen residues, and the pickling on the copper surface is not thorough enough
4.
The packaging time is too fast, the heat is not dissipated, and the tin furnace impurities are too much
5.
The quality of copper is not good, and there are too many impurities
6.
The temperature has an effect on the activity of copper atoms, and hot days turn yellow faster
than cold days.
These issues can be addressed
in the following ways.
1.
Mold aperture> wire warp +0.
02mm (the purpose is very simple, can not be too thin);
2.
After production, it can be placed for about 2 hours and then packaged (purpose: internal heat dissipation);
3.
Buy a good flux, match the flux concentration, mainly the flux affects the quality of tin plating;
4.
Choose a better oxygen-free copper wire
.
In a sense, the wire and cable manufacturing industry is an industry
of material finishing and assembly.
First, the amount of materials used is huge, and the material cost in cable products accounts for 80-90% of the total manufacturing cost; Second, there are many types and varieties of materials used, and the performance requirements are particularly high, such as copper for conductors, the purity of copper is required to be more than 99.
95%, and some products should use oxygen-free high-purity copper; Third, the selection of materials will have a decisive impact
on the manufacturing process, product performance and service life.
Among them, the selection of copper wire is particularly important, if the slightest carelessness may cause safety accidents
.
Below, the editor will sort out some of the causes and treatment methods of yellow copper wire
.
Yellowing usually has several causes:
1.
The temperature of the tin furnace is too high and the fluidity is large, resulting in too large the pinhole of the plating and fast penetration of copper and tin
2.
The tin layer is too thin, and the copper and tin penetrate quickly
3.
There are too many flux halogen residues, and the pickling on the copper surface is not thorough enough
4.
The packaging time is too fast, the heat is not dissipated, and the tin furnace impurities are too much
5.
The quality of copper is not good, and there are too many impurities
6.
The temperature has an effect on the activity of copper atoms, and hot days turn yellow faster
than cold days.
These issues can be addressed
in the following ways.
1.
Mold aperture> wire warp +0.
02mm (the purpose is very simple, can not be too thin);
2.
After production, it can be placed for about 2 hours and then packaged (purpose: internal heat dissipation);
3.
Buy a good flux, match the flux concentration, mainly the flux affects the quality of tin plating;
4.
Choose a better oxygen-free copper wire
.
