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Reconstruction of archaeological findings through computer tomography and rapid prototyping techniques

Reproduction of archaeological findings from the direct creation of moulds using rapid prototyping techniques. Moulds are created by binding together ceramic layers of powder

The accurate reproduction of highly valued parts, such as archaeological findings, is a very complex and painstaking procedure. The procedures that are usually followed today for archaeological findings, include, if possible, disassembly and reproduction of the parts through a copy cast. These procedures often result in wear of the original part. The main goal of the proposed project is the use of know-how in the reproduction of archaeological findings, not by creating moulds through the production of wax models, which is what used to be done, but from the direct creation of moulds using rapid prototyping techniques and especially through the binding of layers of ceramic powders. This technology enables the direct production of moulds, which is superior to the indirect method, not only in respect of the dimension accuracy but also the speed. Another goal for the project is the development of algorithms able to correct errors and defections came from the tomographies of the archaeological findings through the appropriate software to be used. The weakness of the procedure of computer tomography for capturing artistic details of the archaeological findings, is going to be dealt with by using digital photos of the original parts and using appropriate software. Solving the above technical problems and considering the geometry of archaeological findings in electronic format, the next step is the study and design of the moulds of the prototypes. This can be conducted through casting simulation software. The mould is thereby designed and verified in order to avoid porous effects and distortions on the final part. The three-dimensional printing technique using binding ceramic powder on layers is going to be used in the project. After casting, the parts will be treated for purification. Several methodologies, such as priming, sounding, etching etc. are to be used, while their suitability for achieving the desired texture of the parts will be investigated. Furthermore, use will also be made of advanced techniques to represent the colour characteristics of the parts like coatings, through natural deposition of steam (PVD) of thin and tough stacks on the outer surface. Optical and dimensional checking of the fidelity of the parts will also be carried out. The main goal of the project, beyond the reconstruction of archaeological findings, is also highlighting the technological achievements of ancient times. The study of the technical solutions adopted and the technical procedures for creating and morphing parts in ancient times, shows the high level of technical abilities of the ancient Greeks, thereby providing motivation for obtaining such models. Keywords: computer tomography, rapid prototyping, archaeological.
Acronym: 
ARAPICO
Project ID: 
3 881
Start date: 
12-05-2006
Project Duration: 
18months
Project costs: 
240 000.00€
Technological Area: 
Moulding, injection moulding, extrusion, sintering
Market Area: 
Robotics

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