2023 年 89 巻 10 号 p. 790-794
The authors propose using microtubes as an alternative to porous structures for improving the accuracy of release agent penetration in a die-casting mold. They evaluated the effectiveness of this method by examining the characteristics of the release agent, creating microtubes of different sizes and angles using a commercial powder bed fusion machine, and evaluating the release resistance during casting. They found that a larger setting size is needed to permeate the release agent when designing microtubes using a layer-by-layer method, and that increasing the angle of the microtube design improves the accuracy of the microtube's internal shape and stabilizes the amount of release agent penetration. The authors also found that controlling the release agent penetration through a microtube is simpler than controlling it through a porous structure, and that the release agent penetration can be controlled by adjusting the output pressure, allowing for the production of high-quality castings.