Apparatus and method for manufacturing three-dimensional net-like structure

摘要

The object is to improve the production efficiency of three-dimensional net-like structures while maintaining the surface quality of the three-dimensional net-like structures. A second chute 6 is located below a hole-free region 33 and is provided between first chutes 4a and 4b. Filaments 20a and 20b located on longitudinal sides 22b and 22c at the periphery of assemblies 21a and 21b are in contact with the upper side of inclined surfaces 46a and 46b of the second chute 6. Such contact disturbs the vertical fall of the filaments 20a and 20b and causes the filaments 20a and 20b to be tangled in loops with the adjacent filaments 20a and 20b and pass through the first chutes 4a and 4b and the second chute 6, while being cooled down with water supplied from openings 51a, 51b and 51c.

主权项

1. A method of simultaneously manufacturing a plurality of three dimensional randomly looped structures, the method comprising:
a. extruding a plurality of assemblies of filaments from melted thermoplastic resin across a predetermined interval parallel to a longitudinal direction through a nozzle having hole groups and a hole-free region formed between the hole groups, each hole group comprising multiple rows of holes parallel to the longitudinal direction, each row of holes comprising a plurality of holes, such that the assemblies of filaments of the plurality of assemblies of filaments extruded from the hole groups are spatially separated from one another by the hole-free region and fall downwardly; and b. hauling off the plurality of assemblies of filaments at a lower rate than a rate at which the plurality of assemblies of filaments falls with a pair of haul-off machines which is arranged below the nozzle, so as to tangle and thermally fuse the plurality of assemblies of filaments irregularly and thereby form loops, and submerging the plurality of assemblies of filaments in water to cause the plurality of assemblies of filaments to cool down and solidify, such that the assemblies of filaments of the plurality of assemblies of filaments are spaced from one another when reaching a water surface of the water, whereby the assemblies of filaments are positioned adjacent to one another and are in contact with one another as the assemblies of filaments move between the pair of haul-off machines and are then separated from one another after passing through the haul-off machines, such that the plurality of three-dimensional randomly-looped structures corresponding to the plurality of assemblies of filaments is obtained.