No assignee for patent application serial number 867271 has been made.
News editors obtained the following quote from the background information supplied by the inventors: "Conventionally, there has been known a device which sequentially laminates resin layers on respective cross sections obtained by cutting off a shaped object in a plurality of parallel planes, to perform stereoscopic shaping, so as to form a shaped object to serve as a three-dimensional model of the shaped object.
"In the field of rapid prototyping (RP) used for prototyping and the like in product development, a laminate shaping method which enable three-dimensional shaping has been employed. As the laminate shaping method, such a matter formed by slicing three-dimensional CAD data of a product and laminating thin plates is prepared as original data for manufacturing, and materials such as powder, resins, steel plates, and paper are laminated thereon, to prepare a prototype. As such a laminate shaping method, there are known an inkjet method, a powder method, an optical shaping method, a sheet laminating method, an extrusion method, and the like. Among these methods, in the inkjet method, a liquefied material is ejected, and then cured to form a layer through irradiation with ultraviolet light (UV), cooling, or the like. According to this method, a principle of an inkjet printer can be applied, and it is thus possible to obtain an advantage of facilitating high definition.
"A three-dimensional shaping device of a resin layer-lamination type ejects, onto a shaping plate, a model material that forms a final shaped object and a supporting material that supports an overhang portion of the model material and is finally removed, while performing scanning in XY-directions, and laminates the materials in a height direction to perform shaping. The model material and the supporting material are each made of a resin having characteristics of being cured by irradiation of ultraviolet light, and an ultraviolet lamp capable of emitting ultraviolet light is scanned in the XY-directions along with nozzles for ejecting the model material and the supporting material, so that the model material and the supporting material ejected from the nozzles are irradiated with ultraviolet light to be cured."
As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Problems to be Solved by the Invention
"However, there has conventionally been a problem in that, since a model material MA and a supporting material SA are simultaneously ejected in one scanning (X-direction) and the model material MA and the supporting material SA come into contact with each other in the uncured state as illustrated in a plan view of FIG. 9(a), both materials are mixed in an uncured liquid state at a boundary between the model material MA and the supporting material SA as illustrated in a vertical sectional view of FIG. 9(b). When curing is performed under this state, the mixed portion expands and discolors, to cause deterioration in shaping quality. Further, it makes removal of the supporting material difficult. Moreover, since the ultraviolet lamp is generally structured to be scanned along with the nozzles, it is difficult to cure the model material and the supporting material immediately after being ejected from the nozzles. For this reason, the longer the state where the materials are mixed in the uncured state continues, the more significant the foregoing problem becomes.
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