Manufacturing method of smd network transformer

A manufacturing method of a Surface Mounted Device (SMD) network transformer, comprising:

• providing a metal material sheet and a plurality of coils, the metal material sheet comprising a substrate, a plurality of metal PINs and an auxiliary sheet, at least one of a left side end and a right side end of each of the plurality of metal PINs being connected with the auxiliary sheet, a cross section of each of the plurality of metal PINs being exposed, the plurality of coils each comprising a magnetic ring and a copper wire;
• tapping a respective copper wire on the plurality of coils;
• welding a wire end of the respective copper wire on a respective one of the plurality of metal PINs at a corresponding position to form a respective one of a plurality of welding positions;
• packaging the welding positions through a glue material in an injection molding mode, the glue material forming a glue frame after the injection molding, and the glue frame wrapping the welding positions;
• packaging the coils in the glue frame by using the glue material again;
• and
• cutting the auxiliary sheet, taking down the substrate and the auxiliary sheet together, and bending and shaping the plurality of metal PINs to form a product.