Connection structure of electric wire and terminal, and manufacturing method thereof

A manufacturing method of a connection structure of an electric wire and a terminal, the electric wire having an insulating coated part in which a conductor part is covered with an insulating material, and a conductor exposed part in which the insulating material of an end of the electric wire is removed, and the terminal is a box-shaped terminal having a first crimp part crimped to the insulating coated part, a second crimp part crimped to the conductor exposed part, and a notched part in which a notch is formed in an upper part between the first crimp part and the second crimp part, the method comprising:

• crimping the first crimp part while covering the notched part together with the first crimp part with a crimp surface of a crimp device in the case of crimping the first crimp part by pressing the crimp surface of the crimp device, and
• forming a seal part which is made of thermoplastic elastomer and covers a surface including the first crimp part and the insulating coated part of a side extending from said first crimp part toward a direction opposite to the end of the electric wire, a surface of the second crimp part and a surface of the notched part in an extension direction of the electric wire so as to seamlessly cover an outer periphery of the electric wire when viewed in a cross section thereof by a metallic mold.