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Grant
Agency: GTR | Branch: EPSRC | Program: | Phase: Research Grant | Award Amount: 179.78K | Year: 2014

This project proposes to investigate the way the polymeric powders of different shapes and sizes flow, interact and sinter in the Laser Sintering process, through modelling and experimental validation. Laser sintering is part of the additive manufacturing technology, known for its benefits in industries where custom made products, lightweight and complex designs are required. In laser sintering a polymer powder bed is heated to just below its melt temperature. A laser is then focused onto the bed which scans a raster pattern of a single layer of the final part. The bed lowers slightly and a new layer of powder is applied. The process is then repeated until the component is made and the additive layer process is complete. The spreading and compaction of the powder is an important part of the LS process, a non-uniform layer of powder leads to high porosity and weaker bonding between layers and therefore a structure with poor mechanical performance. Similarly, the size and shape of particles can change the sintering process. Larger contact areas between particles lead to a good sintering profile and ultimately to a high density part and good mechanical properties. Surface area of particles, polymer viscosity and surface tension are characteristics which will be considered when modelling the flow and sintering process.


Trademark
Victrex Plc | Date: 2008-08-26

Plastic in the form of films; plastic composite material in the form of profiles, boards, sheets, blocks, rods, powder, and pellets for use in manufacturing; synthetic plastic as semi-finished products in the form of foils, plates, rods, profiles, hoses, tubes, and blocks for use in manufacturing; plastics in the form of rods, blocks, tubes, films and sheets, all for use in manufacturing.


Trademark
Victrex Plc | Date: 2010-11-16

Unprocessed plastics; Unprocessed plastic material for industrial use; unprocessed plastics in the form of powders, pastes, granules, emulsions and dispersions, all for use in industry. Plastic composite material in the form of profiles, blocks, rods, powder and pellets for use in manufacturing; synthetic plastic as semi-finished products in the form of foils, rods, profiles, tubes and blocks, for use in manufacturing; plastics in the form of rods, blocks, tubes, films and sheets, all for use in manufacturing.


V

Trademark
Victrex Plc | Date: 2009-01-20

Unprocessed plastics in the form of dispersions for use in coatings; Unprocessed plastic in the form of powder for use in coatings; unprocessed plastic in powder form and dispersions of unprocessed plastic, namely, plastics which will fuse at elevated temperatures to provide coatings for substrates; Unprocessed plastic materials, namely, polyaryletherketones, in powder form; Unprocessed plastic materials, namely, polyaryletherketones in powder form and dispersions of polyaryletherketones for use in providing a protective and anti-adhesive coating on metal substrates; unprocessed plastics in powder form and dispersions of unprocessed plastics for use in providing a protective and anti-adhesive coating on a metal substrate.


Trademark
INVIBIO Ltd and Victrex Plc | Date: 2008-10-07

Unprocessed plastics for use in the medical industry; unprocessed plastics in the form of powders, pastes, granules, emulsions and dispersions, all for use in the medical industry. Plastics for use in manufacture in the medical industry, namely, plastics in the form of bars, blocks, pellets, rods, sheets and tubes; plastics in semi-finished form for use in manufacture in the medical industry, namely, plastics in the form of pellets; plastics in the form of rods, blocks, tubes, films, foil and sheets all for use in manufacturing in the medical industry.

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