Precision Metal Injection Molding MIM Parts
Metal Injection Molding for Precision. Metal Injection Molding (MIM) is ideal for the high-volume production of metal parts with complex geometries and tight tolerances.MIM combines the benefits typically associated with plastic injection molding with the properties of metal.
MIM is abbreviation of Metal Injection Moulding. MIM is a forming method in which a plasticized mixture of metal powder and its binder is injected into a mold. Firstly, mix the selected powder with the binder and then pelletize the pellet for injection molding. As a near-net forming technology for manufacturing high-quality precision parts, MIM technology has the advantages that conventional powder metallurgy, machining and precision casting methods cannot match. Can produce small metal parts with complex shapes (0.1-500g) like plastic products; uniform structure, high dimensional accuracy, high relative density (≥95%); Good surface finish; stable product quality, high production efficiency, easy to achieve large-volume, large-scale production.
MIM parts can be made of a wide variety of metals and alloys to provide the exact properties required for the individual application. A viable alternative to traditional manufacturing processes, Metal Injection Molding offers numerous advantages:
Improved production costs. MIM is more cost effective than other manufacturing processes such as investment casting, die casting, and machining. Typically the higher the production volume, the greater the savings.
Greater design freedom. Design your part as geometrically complex as you’d like. Intricate features including dovetails, slots, undercuts, threads, holes, pockets, splines, and curved surfaces are achievable with MIM.
1. What is MIM technology?
MIM ( Metal Injection Molding) is a manufacturing technology that combines the shape
making complexity of Plastic Injection Molding with the material flexibility of Powder
2. Is the metal melted during the molding process?
No, only the binders are melted allowing the powders to flow like a plastic material. Upon
cooling the binders solidify giving the part strength for handling The part must be
subsequently sintered to high density to achieve the required mechanical properties
3. How does MIM differ from the Conventional PM process?
Conventional PM uses high, uniaxially applied pressure to coarse metal powders in a die set
to produce moderately complex components. Typically, no further densification is gained
during the sintering process. Densities achieved by this method are typically in the range of
80-90% of theoretical which limit the physical properties that can be achieved for the given
alloy. MIM products are not limited in shape complexity due to the flexibility of the injection
molding process. The fine metal powders used- combine with higher sintering temperature
to allow MIM to achieve near full density in the final article. This allows MIm products to have
similar properties as wrought materials.
4. Does the part shrink during removal of binders?
No, the part will not change size in the debinding phase of the process. However, since
sintering achieves near full density of the powders, the part will undergo a size change of up
5. Why should I use MIM?
IM excels in producing small, highly complex parts that are difficult or cost prohibitive to
produce with conventional technologies such as machining or casting