Method of manufacture of seat pad

A method of manufacture of a seat pad comprising the steps of:

• disposing a mesh body wherein a three-dimensional mesh body formed of a plurality of three-dimensionally entangled fibers is disposed on a molding face of a lower mold onto which a liquid raw material of foam made of a synthetic resin is poured;
• forming a cavity wherein while the cavity is formed as an upper mold is laid over the lower mold on which the three-dimensional mesh body is disposed in the step of disposing the mesh body, a contact face of a projection projected on the upper mold toward the cavity is contacted with a back surface of the three-dimensional mesh body, and the three-dimensional mesh body is fixed in the cavity;
• and
• molding wherein the liquid raw material is foamed in the cavity formed in the step of forming the cavity to mold a pad main body formed of the foam and the three-dimensional mesh body is attached and fixed to a front surface of the pad main body;
• wherein the lower mold includes a tubular partitioning wall erected on the molding face and having an opened top end;
• wherein in the step of disposing the mesh body, the three-dimensional mesh body is inserted into an inside of the partitioning wall and the three-dimensional mesh body is disposed on the molding face;
• wherein the partitioning wall includes a notch portion notched from the top end toward the molding face along a height direction;
• and
• wherein the notch has a lower end thereof formed in an arc shape.