日本の製造業は海外との労働コストの格差から，国内空洞化 の危機にさらされている．とくに，基盤産業の一つである金型 産業は大きな打撃を受けている．このような状況下で，金型産 業の活性化に向けた金型製造システムの革新が求められている．%The innovative system of milling-combined laser metal sintering is developed, combining a laser-assisted metal sintering and a milling process. In this process, the periphery of the sintered layers is machined by end mill in each several sintering steps. Smooth surface is obtained after the one process. Applying to the mold manufacturing process, it halved the lead time required in the conventional machining processes.To get the accurate dimensions and a smooth surface required to the injection mold in this method, relation between the energy density of the laser and the sintering surface density is evaluated. In the range of the energy densities bigger than 4.1J/mm~2, approximately 100 % density is obtained. Also, the milling condition of sintered body is decided by evaluating the relation between the surface roughness and cut volume per tooth.When processing a sample by the developed Milling-Combined Laser Metal Sintering system, dimensional accuracy of ±0.03 mm and the surface roughness of Rz20μm are obtained. And it confirmed that a mold manufacturing time is reduced by half than the conventional machining process when applying this process to the injection mold manufacturing.
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