| 主权项 |
1. A method of making a resin panel comprising
extruding a first molten resin material in a vertically downward direction between a pair of split molds, molding surfaces of the split molds including corresponding molding protrusions extending therefrom; extruding a second molten resin material in the vertically downward direction between the pair of split molds; moving a first of the pair of split molds and a second of the pair of split molds toward one another with the first and second molten resin materials extending therebetween; blowing the first molten resin material against the first of the pair of split molds forming a first structure; and blowing the second molten resin material against the second of the pair of split molds forming a second structure, wherein each of the first and second downwardly extruded structures is formed with corresponding reference surfaces that serve as a front surface and a back surface of the resin panel, respectively, the blowing of the first and the second molten resin materials further includes forming a plurality of protrusions protruding inwardly from respective ones of the reference surfaces corresponding to the molding protrusions formed on the molding surfaces of the split molds, the protrusions of one of the first and second structures facing the protrusions of the other of the first and extruded structures, and the first and second structures being joining such that apical portions of the protrusions of one of the first and second structures abut apical portions of the protrusions of the other of the first and second structures, and jutting portions having a linear shape are formed between adjacent protrusions of each of the first and second structures during the blowing of the first and second molten resin materials, the molding surfaces of the split molds not having jutting portions formed thereon. |
