Melting the solder paste makes the surface paint of the enameled wire fall off automatically; depending on the temperature resistance level of the enameled wire, generally F(155), H(180) enameled wire, the solder temperature can be adjusted to 350-400 to automatically hang the tin, and the production use is adjusted to 400.
The maximum rebound angle of the Fuda electrical direct welded polyurethane enameled wire with a nominal conductor diameter of 1.600 mm or more shall not exceed 5 °.
High temperature (400 degrees) can not cause the paint to fall off directly, and the paint temperature must be 1200-1600; tin is the kind of solder used for soldering circuit boards, with a low melting point, 160-250. Mainly a series of direct-welding polyurethane, polyester imine or polyester, etc.
Under high temperature conditions, paint film resins such as polyurethane are decomposed into gas and separated from the surface source of the copper wire. If it is with tin at high temperature, the surface of the copper wire will be tinned. The biggest drawback of using an electric soldering iron is that it is heated on one side, adding flux and other materials, so that the distributed heat is evenly balanced, and the purpose of removing paint and tin is achieved.
Polyurethane enameled wire paint was developed by Bayer in Germany in 1937. Because of its direct solderability, high frequency resistance and dyeability, it is widely used in the fields of electronics and electrical appliances. At present, foreign countries are paying great attention to improving the heat resistance level of polyurethane enameled wire without affecting its direct welding performance. In Europe, the United States, and Japan, Class F and Class H polyurethane enameled wires have been developed.
Due to the rapid development of color TVs, the large-length, salt-free pinhole polyurethane enameled wire developed by Japan for color TV FBT has attracted the attention of countries all over the world, and Japan is still the leader.
1. Mainly a series of direct-welding polyurethane, polyester imide or polyester, etc.
2. Under high temperature, polyurethane and other paint film resins are decomposed into gas and separated from the surface of copper wire. If it is with tin at high temperature, the surface of copper wire will be immersed in tin.
3. The biggest drawback of using an electric soldering iron is that it is heated on one side, adding flux and other materials, so that the heat is evenly distributed, and the purpose of removing paint and tin is achieved.
4. Many enameled wires are not suitable for direct soldering. It is necessary to remove the paint film on the surface with a grinder before proceeding to the next soldering operation.
To choose enameled wire, you need to consider model, material shape, insulation properties, insulation material and many other factors. For example, models are QA-1/155, QZ, QZ-2/155, QA, CCA096, etc.; insulation properties include polyurethane enameled wire, polyurethane Enameled wire, acetal enameled wire, polyimide enameled wire, polyesterimide enameled wire, etc.; insulation materials include polyester, polyurethane, acetal, polyimide, polyesterimide, etc.