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Spring Hinge

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OBE Ohnmacht & Baumgärtner GmbH
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Spring Hinge
Benefit: Increased Component Complexity
Main Forming Process: Metal Injection Moulding
End Use Sector: Consumer Goods
Material: Ferrous

Process Steps: Tapping, Sand Blasting, Polishing, Plating


The concept by Tag Heuer was to produce spectacles without edges and corners that look like they have been formed from a mould. The edgeless hinge movement was designed as two disk-shaped forms that slid over each other.


MIM technology was the only possibility here as the complexity of the component made production via conventional metal-removing processing too expensive. Tolerances meant that the form required could not be produced via waste-wax casting but only via MIM.

Component Specification

Density (g/cm3): 7.9
Tensile Strength (MPa): 510
Hardness (HV1): 120

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