Metal Injection Molding (MIM) Cobalt Optical Communications Parts
Figure 1: MIM Process Flowchart
Currently, around the world efforts are being made to complete the fiber optic network. Accompanying this development, there has been a surge in demand for fiber-optic related products made from cobalt materials offering low thermal expansion. In particular, the complex-shaped packages have produced a high demand for low-cost, metal-powder injection molded products over conventional machine-assembled items. Our products have been created drawing on the Company's nearly 10-year track record with MIM technology. The MIM process, as shown in the flowchart appearing in Figure 1, is a manufacturing process for mass-producing complicated three-dimensional objects in near-net shapes.
Figure 2: Samples of MIM Cobalt Optical Communications Parts
1. Molds and Dimensional Precision
Compared with conventional machining products, our products are low-cost, and, as Figure 2 shows, enable the production of complicated three-dimensional forms of near-net shaped sintered bodies. Furthermore, the dimensional precision is ±0.5
(1) Low Thermal Expansion
With almost the same thermal expansion coefficient as molten manufacturing materials, it is ideal as an adhesive (See Chart 1.).
Chart 1: Thermal Expansion CoefficientUnit：10-6/K 30～400℃ 30～800℃ MIM sintered items 4.20～4.80 9.60～10.20 Molten manufacturing materials(ASTM F15) 4.60～5.20 (10.4)
( ) refers to ASTM F15, given as an example.
(2) Highly Airtight
The relative density exceeds 96%, which is an adequate degree of airtightness for packaging applications.
(3) High Purity
Due to its high density, it has few holes, as seen below (Figure 3), and is well-suited to metal plating.
Figure 3: Microstructure
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