Method for manufacturing insert molded article, mold for insert molding, and insert molded article

A mold for insert molding, the mold comprising:

• a first mold including a placing surface on which an end surface of the metal collar on one side is placed such that an axis of a tube portion of a metal collar including the tube portion is along a mold clamping direction, and a first cavity forming surface adjacent to the placing surface;
• and
• a second mold including a pressing surface to be in contact with an end surface of the metal collar on another side, and a second cavity forming surface adjacent to the pressing surface,
• the first cavity forming surface being formed shallower than the placing surface, and
• the second cavity forming surface being formed shallower than the pressing surface.

An insert molded article comprising:

• a metal collar including a tube portion;
• and
• a resin molded portion to which the metal collar is assembled,
• the tube portion including end surfaces on one side and another side along an axis of the tube portion, and a barrel portion between the end surfaces, and
• the barrel portion bulging outward in a radial direction beyond the end surfaces to bite into the resin molded portion.