| 摘要 |
PROBLEM TO BE SOLVED: To easily make a weld line formed on a molded article an invisible width or lower, and also, accurately estimate the location and the width of the weld line. SOLUTION: The width of the weld line of the injection-molded article is measured. Based on a boosting speed map, the width of the weld line is judged. When the width is a specified width or higher, a boosting speed to make it the specified width or lower is obtained. An injection speed which provides this boosting speed is set to be a new injection-molding condition. The boosting speed map is prepared in such a manner that the boosting speed is obtained based on a function for the variation with time of the internal pressure of a molten material, at a location wherein the generation of the weld line is estimated when the injection-molding is actually performed, and at the same time, based on the width of the weld line when the injection is performed by the obtained boosting speed.
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