| 摘要 |
PROBLEM TO BE SOLVED: To suitably design a mold without actually trially molding by sequentially altering a gradient of a mold surface and a mold surface state based on a mold release resisting force to be received at mold surfaces, and obtaining a suitable steel material and the mold surface state in a mold releasing direction. SOLUTION: A mold release resistance value generated at a surface unit of a molding is obtained (S3). If the values falls within predetermined decision values, a gradient and a mold surface state of initial values are adopted as design values (S4). If the initial values exceed the decision values, the gradient is changed (S6). Then, the gradient is again calculated and the mold release resistance value at the changed gradient value is obtained (S8). If the resistance value falls within the predetermined decision value, the changed gradient and the surface state of the initial value are adopted as design values. Similarly, whether the resistance values of the respective surfaces fall within the predetermined decision values or not is decided, and if the resistance values of the surfaces of all the moldings fall within the decision values, the again calculated gradient and the mold surface state of the initial value are adopted as design values (S9).
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