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Precise and fast moulding of microglass components by means of micro-injection moulding

(Kopie 3)

Project Leader: Prof. Gerhard Ziegmann (Dr.Eng) and Prof. Joachim Deubener (Dr.Eng)

Funding period: 2010 - 2012
Funding body: DFG, Bonn
Funding reference:
-

Contact partner: Dipl.-Ing. Randolf Hoffmann and Dipl.-Geow. Simon Striepe

Due to their good chemical and thermal resistance, their optical properties, the ability to be sterilised, their bio-compatibility and ability to be cleaned, micro-structured glass components have many applications. In spite of this, the current techniques for the production of such glass components are not suitable for the realisation of cost-effective mass production. It is therefore essential to find new production options in order to increase the cost-effectiveness of the production of micro-structured glass components and simultaneously guarantee high production accuracy with short cycle times.

The objective of the project is to systematically study the processability of glasses using the micro-injection moulding procedure. To this end, an experimental micro-injection moulding system is to be developed and built on a laboratory scale. In addition, the thermodynamic properties of chemically resistant phosphate glasses with a low glass transition temperature are to be studied, with special consideration given to the ambient conditions that prevail during the micro-injection moulding process. Furthermore, the effects of the moulding post material and its surface finish on the flowability of the glass melt, in the micro-cavities and innovative procedures for the manufacture of these cavities are to be studied. In order to simulate the flow of the melt into the micro-cavities, a mathematical model is to be developed. Finally, the process parameters that influence quality and the quality control methods (visual and mechanical properties, residual stress, surface roughness, geometry and dimensional accuracy) are identified.

 

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