Method of producing assembled product and assembling apparatus

An assembling apparatus configured to assemble an assembled product from a plurality of parts, the assembling apparatus comprising:

• a mold comprising a first unit and a second unit opposing the first unit,
• wherein the first unit comprises a first movable portion that is movable, a second movable portion, and a third movable portion, the first movable portion comprising a plurality of first forming portions, the second movable portion comprising a plurality of second forming portions, and the third movable portion comprising a plurality of third forming portions, the plurality of the first forming portions being configured to form a plurality of first parts, the plurality of the second forming portions being configured to form a plurality of second parts, and the plurality of the third forming portions being configured to form a plurality of third parts,
• wherein the second unit comprises a fourth forming portion, a fifth forming portion, and a fourth movable portion, the fourth movable portion being configured to move so as to switch a first assembling portion, a second assembling portion, and a third assembling portion,
• wherein the first movable portion is configured to have at least one first forming portion of the plurality of first forming portions oppose the first assembling portion, and the first assembling portion is configured to hold a first one of the first parts formed in the at least one first forming portion of the plurality of first forming portions,
• wherein the second movable portion is configured to have at least one second forming portion of the plurality of second forming portions oppose the second assembling portion in which a second one of the first parts is held, and the second assembling portion is configured to assemble a first one of the second parts formed in the at least one second forming portion of the plurality of second forming portions to the second one of the first parts held in the second assembling portion, and
• wherein the third movable portion is configured to have at least one third forming portion of the plurality of third forming portions oppose the third assembling portion in which a part formed by assembling a third one of the first parts to a second one of the second parts is held, and the third assembling portion is configured to assemble a part formed by assembling the third one of the first parts to the second one of the second parts to a third part formed in the at least one third forming portion of the plurality of third forming portions.