Patent ID: 9334593
Filing Date: 2016-05-10
CPC Classification: B29B,B29C,D02G,D04H

Claim Text:
1. A method for manufacturing a netted structure, comprising: a filament assembly step comprising extruding downward a molten resin as a plurality of filaments, wherein said plurality of filaments forms a filament assembly having a width and a thickness; a cooling water supplying step comprising supplying cooling water downward on uniformly roughened metal surfaces of chutes for cooling said filament assembly extruded downward, said chutes being opposed to each other and being located on both sides of said filament assembly along the width direction of said filament assembly and vertical to the thickness direction of said filament assembly, and said chutes being inclined so that the distance between each said chute becomes narrower downward and toward the center of said filament assembly; a loop forming step comprising receiving a first part of the filaments of said filament assembly on said roughened metal surfaces of said chutes supplied with said cooling water to form loops and make adjacent filaments within said first part of the filaments contact and entangled with each other; and a dense-and-sparse portions forming step for forming surface layers having a higher apparent density and an inner layer located between said surface layers and having a lower apparent density, said dense-and-sparse portions forming step comprising: