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Metal Injection Molding(MIM)

Metal Injection Molding or MIM, also called Powder Injection Molding or PIM, is a net-shape process for producing solid metal parts that combines the design freedom of plastic injection molding with material properties near that of wrought metals. With its inherent design flexibility, MIM is capable of producing an almost limitless array of highly complex geometries in many different alloys ranging from stainless steels, alloy steels, and soft magnetic materials, controlled expansion materials (low CTE), and custom alloys. Design and economic limitations of traditional metalworking technologies, such as machining and casting, can be readily overcome by MIM.

Today, MIM is serving critical performance applications in a wide range of industries and products including, automotive, aerospace and defense, cellular telephones, dental instruments, electronic heat sinks and hermetic packages, electrical connector hardware, industrial tools, fiber optic connectors, fluid spray systems, hard disk drives, pharmaceutical devices, power hand-tools, surgical instruments, and sporting equipment.

Sunshine's quality assurance and engineering organization apply statistical methods to production and final inspection to ensure that your parts meet defined critical specifications. 80% of our production is supplied ship-to-stock.our system can be supported with daily,weekly, and monthly shipments. Sunshine focus is to deliver what you need, when you need it.

MIM technology/ production processes

Production process:

1. Mixing process Machine photos                                                 Raw material

2. Injection machine Feeding: About 60% of the metal powder and 40% of the binder are mixed into a homogeneous feed.

3.Injection molding: It is feed into injection molding machine to be molding. The process similar to injection molding. Parts of the shape and structure in the mold forming.

4.Debonding: It is to use the method of physical or chemical to remove the binder in the parts. And then the parts will become simple metal ones from the metal powder and binder mixture. After this process, the volume shrinkage of part will be shrank, but the shape and structure will be unchanged.

5.Sintering: This process is part densification treatment, whose volume will be further reduced, but the shape and structure will be still same, and last the relative density will greater than or equal to 95%.