Rapid prototyping method and apparatus using V-CAD data

Data processing: generic control systems or specific application – Specific application – apparatus or process – Product assembly or manufacturing

Reexamination Certificate

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C700S097000, C700S098000, C700S118000, C264S401000

Reexamination Certificate

active

07406361

ABSTRACT:
V-CAD data is prepared by dividing external data12consisting of boundary data of an object into rectangular parallelepiped cells13having boundary planes orthogonal to each other in accordance with octree division and separating the respective divided cells into internal cells13apositioned on the inner side of the object and boundary cells13bincluding a boundary face, and a modeling unit quantity of a prototyping material7is changed in accordance with sizes of the internal cell13aand the boundary cell13bof a modeling portion. The prototyping material7is a resin, lumber powder, a low-fusing-point metal, metal powder, ceramics powder or a mixture of a binder and one of these materials, and its modeling unit quantity is set in such a manner that the modeling unit quantity is smaller than a capacity of a corresponding cell and does not protrude from the boundary plane of the cell. As a result, by using the V-CAD data, a program for rapid prototyping can be simplified, and a model production time can be greatly reduced.

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