| 摘要 |
<p>A production method of a metal mold for molding a foamed product pattern for use in sublimation pattern casting method comprising a step for determining the final three-dimensional data of the profile of a foamed product pattern correlated with the three-dimensional data of the profile of a casting in order to mold a casting as the final product having target dimensions, a step for inputting the final three-dimensional data thus determined to the controller of an NC machine tool, and a step for cutting a cavity having the profile of the foamed product pattern thus determined in the base material of a molding die by means of the NC machine tool. Computer simulation of a casting by sublimation pattern casting method employing a virtual foamed product pattern is performed and the final three-dimensional data is determined based on information obtained from deformation of the casting due to the simulation, or a foamed product pattern is manufactured by way of trial and a casting is actually manufactured by way of trial by sublimation pattern casting method using the foamed product pattern manufactured by way of trial, and the final three-dimensional data is determined by feeding back the difference between the dimensions of the casting manufactured by way of trial and the target dimensions. Alternatively, the final three-dimensional data may be determined by using both the simulation and feedback.</p> |
