Belt molding and method for producing same

A method for producing a belt molding configured to be attached along an upper edge of a door panel of a vehicle door, the method comprising:

• preparing a molding body extending in a longitudinal direction and made of a thermoplastic resin, the molding body comprising a vehicle exterior side wall portion, a vehicle interior side wall portion facing the vehicle exterior side wall portion, and a top wall portion integrally connecting the vehicle exterior side wall portion and the vehicle interior side wall portion, the vehicle interior side wall portion comprising a side wall remaining portion formed by removing a part of the vehicle interior side wall portion in a vicinity of an end of the molding body;
• preparing an end cap configured to be attached to one end portion of the molding body, the end cap comprising a lid portion configured to close an opening end of the molding body, and an insertion portion extending from the lid portion and configured to be inserted between the vehicle exterior side wall portion of the molding body and the side wall remaining portion, the insertion portion comprising a vehicle interior side surface extending along an insertion direction of the end cap on a vehicle interior side, the insertion portion on which a catch surface provided to intersect the vehicle interior side surface is formed;
• inserting the insertion portion of the end cap into the molding body such that the insertion portion of the end cap is disposed to face a facing portion that is a part of the molding body while the facing portion is positioned on a vehicle interior side relative to the insertion portion and faces the insertion portion;
• and
• forming a protruding portion in the molding body, the protruding portion protruding on a vehicle exterior side relative to the vehicle interior side surface of the insertion portion of the end cap, by deforming a portion of the facing portion of the molding body, the portion of the facing portion of the molding body being closer to the lid portion of the end cap relative to the catch surface,
• wherein the end cap is prevented from moving in a direction opposite to the insertion direction in a state in which the protruding portion of the molding body and the catch surface of the end cap engage each other.