Foam molding apparatus and foam molding method thereby

A foam molding apparatus comprising:

• a foaming agent supply unit configured to supply a foaming agent;
• a molten resin supply unit configured to supply molten resin;
• a fixed mixing unit configured to produce a foaming resin-critical solution by mixing a foaming agent supplied from the foaming agent supply unit and molten resin supplied from the molten resin supply unit through multiple channels of a rod-shaped body;
• and
• a molding unit configured to mold a foam molding product using the foaming resin-critical solution supplied from the fixed mixing unit,
• wherein the rod-shaped body includes:
• plate-shaped members formed by 2-dimensionally arranging unit cells forming an aperture;
• and
• spacers connecting the plate-shaped members such that the plate-shaped members are stacked and the unit cells are 3-dimensionally arranged,
• wherein the spacers connect adjacent plate-shaped members to each other with a gap that maintains the aperture,
• wherein the plate-shaped members form a layered structure 2-dimensionally repeated in a same pattern,
• wherein the rod-shaped body is a stacking structure in the layered structure and the spacers are repeated in the same pattern as the repeated pattern of the layered structure even in a direction in which adjacent layered structures are connected by the spacers,
• wherein the rod-shaped body is a stacking structure formed by repeating the unit cells and the spacers in x-, y-, and z-axial directions around one origin and each of the unit cells is a 3D body formed by overlapping three octagonal prisms having a square as one surrounding surface such that axial lines are disposed along the x, y, and z axes around one origin;
• and
• each of the spacers is a cube extending from the surrounding surface crossing the axial line, connected to the surrounding surface of an adjacent unit cell, and having the surrounding surface as one side.