Apparatus for manufacturing a netted structure and method for manufacturing a netted structure
AssigneeAirweave Manufacturing Inc.
InventorHiroyuki Sasaki
Life of this patent
Estimating the term…
Abstract
The purpose of the invention is to eliminate water-permeable sheets and thus to eliminate various bothersome works related to the water-permeable sheets. To achieve the purpose, the surfaces of the chutes 21, 22 are roughened by sandblasting. The chutes 21, 22 are made of metal such as stainless steel, for example. Processed metal surfaces are generally smooth with almost no friction. Moreover, metal has its inherent water repellency. If water is flowed on a bare metal surface, some parts do not get wet while some parts have concentrated surge water flow thereon. However, by sandblasting the surfaces of the chutes 21, 22, adequate friction resistance is generated and inherent water repellency of metal is eliminated.
Claims14
An apparatus for manufacturing a netted structure, comprising:
- a pair of opposing chutes located on both sides of a filament assembly extruded downward along the width direction of said filament assembly and vertical to the thickness direction of said filament assembly, said chutes being inclined so that the distance between each said chute becomes narrower downward and toward the center of said filament assembly;
- and
- a pair of water supplying units for supplying cooling water downward on surfaces of said chutes to cool said filament assembly;
- wherein the surfaces of said chutes are uniformly roughened so that said cooling water spreads all over the surfaces of said chutes and forms cooling water layers;
- and
- said cooling water layers receive the filaments in surface parts of said filament assembly to form loops and make the adjacent filaments contact and entangled with each other so as to form surface layers having a higher apparent density and an inner layer located between said surface layers and having a lower apparent density.
A method for manufacturing a netted structure, comprising:
- a cooling water supplying step of supplying cooling water downward on uniformly roughened surfaces of chutes for cooling a 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, 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 of receiving filaments in surface parts of said filament assembly by said cooling water to form loops and make the adjacent filaments contact and entangled with each other;
- and
- a dense-and-sparse portions forming step of forming surface layers having a higher apparent density and an inner layer located between said surface layers and having a lower apparent density.
Dependencies are inferred from the claim text.