When people weld D-sub hybrid connectors, they must pay attention to these precautions to avoid unnecessary trouble. First of all, it is recommended to wrap a layer of thermal insulation adhesive paper on the inner mold before wrapping copper foil to prevent the core wire from being burned when welding copper foil or injection molding external mold, and then the covered copper foil is not allowed to have cracks or damage, if the copper foil is found to be damaged, you can use copper foil to cover the damage, and then the joint between the repaired copper foil and the original copper foil should be completely welded with solder. When the copper foil is completely wrapped, it is not allowed to see the inner mold or core wire exposed from any Angle, the most important thing is to pay attention to not burn the core wire when welding, and do not allow the solder to dissolve into the gap between the inner mold and the connector and the thermal insulation adhesive paper that the solder penetrates into the inner mold. Pay attention to these matters, you can effectively avoid some unnecessary trouble.