Three-dimensional filaments-linked structure manufacturing apparatus, manufacturing method of three-dimensional filaments-linked structure, and mattress core material

A manufacturing apparatus for manufacturing a three-dimensional filaments-linked structure in which filaments are tangled sterically, comprising:

• divided weight information acquisition means for acquiring divided weight information per block, by dividing weight distribution in a height direction of a person, in virtual planes orthogonal to a height axis extending from a top of a head of the person toward a heel of the person and disposed at intervals, the divided weight information acquisition means being further for recording the divided weight information respectively acquired per block, in correlation with a distance of each respective block in a height axis direction from a starting point of the top of the head;
• and
• three-dimensional linked structure formation means for making an extruder extrude a thermoplastic resin material in continuous lines via plural nozzles, tangles and fuses filaments of the thermoplastic resin material extruded in a three-dimensional net shape, for cooling the filaments while transferring the filaments, and for forming a three-dimensional filaments-linked structure relatively long in a product streaming direction,
• the three-dimensional linked structure formation means including filament density control means for controlling filament density based on the divided weight information recorded in the divided weight information acquisition means, the filament density being a filament density of a region corresponding to each respective block of the formed three-dimensional filaments-linked structure in the product streaming direction.