Metal Injection Molding (MIM) is an advanced manufacturing process that combines:
Plastic injection molding technology
Powder metallurgy technology
It is widely used to produce small, complex, and high-precision metal parts in large-scale production.
Compared with standard plastic injection molding, MIM materials have distinct characteristics:
Higher density
Strong abrasiveness
Poorer flowability
Therefore, a dedicated MIM injection molding machine must be designed with enhanced performance, including:
Wear-resistant screw and barrel system
Higher injection pressure capability
Stable and precise temperature control system
Strong plasticizing performance for metal feedstock
High-accuracy injection control system
These features ensure stable production and consistent part quality.
1. Mixing
Metal powder is blended with binder materials (wax and polymers) to form feedstock.
2. Injection Molding
The prepared feedstock is injected into molds using a MIM injection molding machine to form green parts.
3. Debinding
The binder material is removed from the molded parts through chemical or thermal processes.
4. Sintering
Parts are sintered at high temperature to achieve final density, strength, and metal properties.
Complex Geometry Capability
Enables production of intricate metal parts that are difficult or costly to machine.
High Precision
Ensures excellent dimensional accuracy and repeatability.
High Production Efficiency
Ideal for large-scale mass production.
Material Efficiency
Reduces material waste compared to traditional CNC machining.
Mobile phone components
Medical instruments
Automotive parts
Watch accessories
Lock components
Gear systems
Precision electronic parts
Watch real application case:
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