Metal Injection Molding (MIM) is a manufacturing technology that combines the design freedom of plastic injection molding with the mechanical properties of metal. It enables the cost-efficient production of highly complex and precise metal components in serial production.
MIM is particularly competitive when a component combines small size, complex geometry, and high quality requirements.
What types of components are suitable for MIM?
MIM technology is typically used for components that include:
- complex internal structures and thin walls
- multiple mounting points, bosses, or threads
- opportunities to combine several parts into a single component
- requirements for high surface quality and dimensional accuracy
The example component above illustrates the strengths of MIM well: internal support structures, fine details, and a finished outer surface can be achieved without extensive post-processing.
How does MIM differ from other manufacturing methods?
Machining (CNC):
Enables high precision, but complex geometries quickly increase manufacturing time and cost.
Investment casting:
Suitable for complex shapes and stainless steel, but often requires secondary machining to meet tolerances and surface finish requirements.
MIM combines the advantages of both:
- high design freedom
- good dimensional accuracy
- minimal need for post-processing
- excellent repeatability in serial production
Why does the choice of manufacturing technology matter?
The manufacturing method is not just a production decision—it directly impacts:
- the cost structure of the component
- supply chain efficiency
- quality and repeatability
- overall project risk
Selecting the right technology can eliminate entire process steps, shorten lead times, and improve the final product quality.
Gelecta as your sourcing partner
Gelecta supports customers in selecting the right manufacturing technology already at the design stage. MIM is one of the key technologies in projects where geometry and precision are critical.
We work continuously with audited and specialized suppliers. Our partners are evaluated on-site, and their processes and quality are actively monitored.
Our local sourcing manager operates close to production and follows project progress directly on-site.
As part of our ongoing collaboration, Jouni Heikinheimo and Otto Hartikainen visited our suppliers in March to ensure that quality, processes, and communication continue to meet Gelecta’s and our customers’ requirements.
Summary
MIM is not the right solution for every product—but in the right application, it is often superior.
It is not just about how a part is manufactured.
It is about how it should be manufactured.
