Synthetic resin molding and molding method therefor

A molding method for a synthetic resin molding, the method comprising:

• preparing a mold configured to form the synthetic resin molding, the mold including
• a molding body having a side edge,
• a bent portion arranged on the side edge and bending in a first direction,
• a flange extending from the bent portion in a second direction orthogonal to the first direction, the flange including a wide portion, and a narrow portion continuous with the wide portion and having a shorter length in the second direction than the wide portion,
• a protrusion protruding in the first direction from a boundary portion between the bent portion and the flange,
• a gate at a position corresponding to an end of the narrow portion;
• and
• injecting a colored resin material from the gate into the mold, the colored resin material containing a luster agent kneaded in the material.

A synthetic resin molding, comprising:

• a molding body having a side edge;
• a bent portion arranged on the side edge and bending in a first direction;
• a flange extending from the bent portion in a second direction orthogonal to the first direction, the flange including a wide portion, and a narrow portion continuous with the wide portion and having a shorter length in the second direction than the wide portion;
• and
• a protrusion protruding in the first direction from a boundary portion between the bent portion and the flange.