Papers by Keyword: Glass Forming

Abstract: In order to improve the structure, section shape and inner flow performance of micro-channel in Micro-fluidic system, a novel fabricating process of bio-micro-channel (BMC) is proposed based on the softening and forming property of glass material. By the manipulation of heating, pulling and blowing, a bio-micro-channel is made from glass capillary with specific functional units. A vitreous bio-micro-channel fabricating device (VBMCFD) is presented with working models of uniaxial and biaxial tension. Using common borosilicate glass capillary as experimental material, the affecting parameters of micro channel inner diameter, outer diameter, thickness and functional unit key parameter are tested, such as heating voltage, heating time, pulling velocity, pulling displacement and inner pressure. The bio-micro-channel is fabricated with micron scale inner diameter, about 5μm, and spherical functional unit. The experimental results show that the prototype of VBMCFD is characterized by reliable process, simple structure, low cost, etc. The vitreous bio-micro-channel is fabricated with circular-cross-section straight channels and uniform functional units, which are the key characters of biologic micro-channel.

Abstract: Production of glass bottles requires blowing of the glass after entrance of a gob of molten glass in the blank mould. The final shape of the bottle is highly dependent on the viscosity of the glass, the blow-pressure and the temperature distribution in the glass and the mould and simulation of this complicated process enables optimization of the process conditions. During simulation of blowing of the glass, the mesh has to be adapted due to the extreme deformations of the mesh. To reduce the user-time and to be able to run this kind of analyses automatically based on an arbitrary base-geometry, a completely automated remeshing/rezoning procedure is set-up. Using the automated remeshing capability, simulations of the glass bottle forming process have successfully been performed, enabling for example optimization of process settings.

Abstract: In glass manufacturing a variety of different forming processes is used to meet product requirements like shape and quality but also throughput and cost targets might influence the decision for the optimal forming process. Out of these variety one can select a group of forming processes that have in some respects similar forming principles but then also some very different physics. The present paper focuses on similarities and differences of drawing processes and its requirements to modeling.

Abstract: Based on the results in glass scientific research fields such as the National Natural Science Foundation project—forming and structure of heavy metal oxide glass, national defense new material projects and various other research projects, the new achievement and the present progress on the investigation in non-crystalline science exploration and the development for new kinds of glass materials in the school of Materials Science and Engineering of Central South University are briefly introduced in this paper.