Nose bridge strip welding mechanism

The invention provides a nose bridge strip welding mechanism which is used for welding a nose bridge strip and a mask piece. The nose bridge strip welding mechanism comprises a first mold plate, a second mold plate and a guide piece. The first mold plate is provided with a concave groove and a positioning groove, the positioning groove is formed in the groove opening of the concave groove, and the positioning groove communicates with the concave groove and is matched with the nose bridge strip in shape. And the nose bridge strip can be positioned in the positioning groove. The second mold plate is provided with a convex block matched with the concave groove, the convex block and the concave groove are arranged in a relative movement mode, and the mask piece is attached to the convex block. And a guide part of the guide piece is rotatably or rollably arranged in the concave groove, so that the nose bridge strip is in contact with the guide part when the convex block and the concave groove are close to each oth