Patent ID: 8113895

Claim:
A method for manufacturing an article for water sports, comprising the following steps of: uniformly supplying a liquid of pre-cured photo-curing resin at a predetermined depth on a table that is capable of moving up and down while maintaining a horizontal plane; irradiating a light beam on a surface of the liquid of photo-curing resin based on two-dimensional surface data that expresses a virtual cross sectional surface of a predetermined end part of the article extracted from three-dimensional shape data that expresses a three-dimensional shape of the article; creating a first solid piece layer with a predetermined thickness based on the surface data by curing the resin that has been irradiated; lowering the table at a predetermined depth and supplying a liquid of pre-cured photo-curing resin on top of the first solid piece layer; irradiating a light beam onto said liquid of pre-cured photo-curing resin based on surface data of a virtual cross sectional surface adjoining the virtual cross sectional surface that has constructed said first solid piece layer in an overlapping manner to connect a second solid piece layer to the first solid piece layer so that they are integrally united; and sequentially repeating the above steps until n-th layer that corresponds to an end of the article, where all layers are unified by building-up the photo-curing resin to thereby ultimately form the three-dimensional shape of the article; wherein said three-dimensional shape of the article is configured by an outer shell having a hollow structure for forming an outer shape of the article, a partition wall arranged within the hollow structure of the outer shell for forming a plurality of sectioned spaces, and a vent hole formed on each partition wall so that gas can pass through the plurality of sectioned spaces.