| 摘要 |
A product solid (A) is generated on a CAD screen using a 3-dimensional CAD system, then thin film solids (B1 and B2) are added to the product solid so as to divide an object mold into parts or fill holes of the mold, and after this, the product solid (A) is united with the thin film solids (B1 and B2) into one, thereby to generate a thin film formed product solid. This thin film formed product solid is put in a rectangular solid, then the thin film formed product solid is removed from the rectangular solid, thereby to generate cavities in the rectangular solid. And, along these cavities, the mold is divided into a cavity solid and a core solid. In addition, the thickness (t) of each thin film solid is decided so as to prevent melted resin invasion. This method can thus divide a mold into a cavity and a core easily when product data is converted to solids for designing a mold using a 3-dimensional CAD system.
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