Technological Strength

Design Capability: Mastery of core MIM mold design logic, precisely reserving 15%-20% for sintering shrinkage, optimizing wall thickness uniformity, gates, runners, venting, and ejection systems. Capable of forming complex structures with a minimum wall thickness of 0.25mm and a minimum hole diameter of 0.5mm, supporting structural designs that are difficult to achieve with traditional processes, such as internal and external threads, deep holes, blind holes, irregular curved surfaces, multi-steps, and micro-holes.

Selected high-sphericity metal powders (mainly stainless steel 304/316L/17-4PH) with a particle size of 5–20μm are used. The powder loading is 60%–65%, and the powder is mixed and granulated with a special binder using a twin-screw extruder to create a stable and uniformly dispersed MIM feedstock. Equipped with a 50–200 ton high-precision horizontal injection molding machine, the feedstock features closed-loop control of barrel temperature (140–180℃) and injection pressure (50–100MPa), a molding cycle of 20–60 seconds, and produces uniform density, free of bubbles and material shortages.

Employing a combined process of oxalic acid-catalyzed degreasing and thermal degreasing, over 98% of the binder in the green blank is removed in stages, preventing deformation, cracking, and blistering. Equipped with a vacuum-protected sintering furnace (helium/argon), it supports high-temperature sintering at 1230–1385℃ (stainless steel), with temperature uniformity ±5℃. Parts exhibit linear shrinkage of 15%–20%, with final density, strength, hardness, and toughness approaching forged parts levels, and dimensional tolerances of 0.03–0.05%.

Equipped with CNC machining centers, CNC lathes, Swiss-type lathes, and grinding machines, it can perform precision finishing of holes, end face milling, thread machining, groove machining, and irregular surface finishing on sintered parts, and is suitable for high-hardness materials such as stainless steel. Dimensional accuracy reaches ±0.005mm, with form and position tolerances such as coaxiality, perpendicularity, and flatness ≤0.01mm, and surface roughness Ra≤0.4μm, meeting the stringent assembly requirements of medical, electronics, and high-end hardware industries.

Mechanical polishing (vibratory/roller/manual), electrochemical polishing, and magnetic polishing can optimize surface roughness from Ra1.6μm to Ra0.1–0.4μm, achieving a mirror finish. For stainless steel: passivation, electrolytic polishing, and pickling improve the salt spray and acid/alkali resistance of 304/316L. PVD coatings (titanium nitride, diamond-like carbon DLC), carburizing, nitriding, blackening, powder coating, and electroplating improve surface hardness (HV800–2000), abrasion resistance, and service life.

Equipped with high-end testing equipment such as a coordinate measuring machine, 2D image analyzer, height gauge, profiler, roughness tester, hardness tester (Rockwell/Vickers), salt spray test chamber, metallographic microscope, densitometer, and tensile testing machine. Strictly adhering to ISO9001, IATF16949, and medical-grade GMP systems, we conduct 100% full inspection plus random sampling re-inspection, issuing complete test reports to ensure product consistency and reliability.