Superiority of V-LINE® Injection Molding Machine in Metal Injection Molding for Precise Parts

In metal injection molding (MIM), it is important to reduce flash and flow mark as much as possible for high quality and high productivity on each MIM green parts. The back flow that occurs in injection process and the ability of injection response affect flash and flow mark. In this study, the experiment using the spiral-flow tester and the medical clip mold are carried to compare V-LINE® injection molding machine (V-LINE®) that plasticizes with the single screw and fills with the plunger to In-line injection molding machine (In-line). The experiment using the spiral-flow tester shows that the flow length molded by V-LINE® is longer than that one molded by In-line. And the experiment using the medical clip mold shows that V-LINE® can reduce flash and flow mark more than In-line. ©2025 Japan Society of Powder and Powder Metallurgy.