There are usually several reasons for yellowing:
1, the tin furnace temperature is too high, fluidity, resulting in a large coating, copper and tin penetration;
2, tin layer is too thin, copper and tin penetration;
3, flux residue too much halogen, copper surface pickling is not thorough;
4, the packaging time is too fast, the heat is not scattered, too many impurities in the tin furnace;
5, the quality of copper material is off, too many impurities;
6, the level of temperature has an effect on the activity of copper atoms, hot days faster than the cold yellow.
These problems can be solved by the following methods:
1, mold diameter> line by +0.02mm (the purpose is very simple can not be too thin coating);
2, can be placed after production for about 2 hours before packaging (purpose: internal heat dissipation);
3, buy a good flux, with a good flux concentration, mainly the impact of tin flux quality;
4, choose a better oxygen-free copper wire.
In a sense, the wire and cable manufacturing industry is a material finishing and assembly industry. One is that the amount of materials is huge, and the cost of materials in wire and cable products accounts for 80-90% of the total manufacturing cost; the second is that the materials used are of many types and varieties, and the performance requirements are particularly high. For example, copper for conductors requires the purity of copper. Above 99.95%, some products use oxygen-free high-purity copper; Third, the choice of materials will have a decisive influence on the manufacturing process, product performance and service life.
Foam Cutter
Auto horizontal and vertical Foam Cutting Machine uses the circle blade for high speed cutting. It can be used for both of Horizontal & Vertical cutting.
. Driven by high accuracy motor for accurate cutting and high efficiency.
. With 360° turning-lifting table
Computerized circle cutting machine, This machine is mainly used for multi foam block`s horizontal cutting. The cutting
is efficient for its continues cutting without move back. And this machine adopts the
PLC controller to adjust the cutting thickness and cutting speed. So the simple and
precious operation is the characteristic of this machine. There are 4 air blowers
which make the foam steadier.(Suction is optional)
3D Foam Cutter,Industrial Foam Cutter,Sponge Cutting Machine,Vertical Foam Cutting Machine
SOFTLIFE MATTRESS MACHINERY CO.,LTD , https://www.machinesoftlifefoam.com