Microstructured diamond dies for transfer moulding
| Autor: | Klas Hjort, Joakim Andersson, Paul Eriksen, Patrik Hollman, Henrik Björkman |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
congenital
hereditary and neonatal diseases and abnormalities business.product_category Materials science engineering.material hemic and lymphatic diseases parasitic diseases Materials Chemistry Wet oxidation Electrical and Electronic Engineering Composite material Electroplating chemistry.chemical_classification Mechanical Engineering Abrasive Metallurgy A diamond Diamond General Chemistry Polymer respiratory tract diseases Electronic Optical and Magnetic Materials body regions Wear resistance chemistry engineering Die (manufacturing) business |
| Zdroj: | Diamond and Related Materials. 10:7-12 |
| ISSN: | 0925-9635 |
| DOI: | 10.1016/s0925-9635(00)00367-8 |
| Popis: | The wear of Ni dies, used for transfer moulding of abrasive polymer compounds, was investigated and found to be too severe for high precision moulding of micromechanical structures. A diamond die was manufactured as an alternative. It consisted of a thin replicated diamond film on an electroplated Ni carrier. The wear of the diamond die was investigated and found to be negligible. Initially, with normal hydrogen-terminated diamond surfaces, the polymer stuck to the die. The reason for this was that a hydrogen-terminated diamond surface is hydrophobic, which makes it difficult for the release spray to stay on the diamond surface. To solve the problem, the diamond surface was made hydrophilic (polar) by wet oxidation, which enabled the release spray to stay on the surface during plastic moulding. Consequently, no sticking of the polymer to the polar diamond surface was observed. Thus, diamond proved to be a very good die material, with enormous wear resistance compared to Ni, for transfer moulding of abrasive polymers. |
| Databáze: | OpenAIRE |
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