Extrusion techniques Patterns

Similar to 2-2 composite more comphcated geometiy was reported for 3-1 connectivity pattern (Zhang et al. 1996). Honeycomb PZT stracture was manufactured by the extrusion technique. Consequently the inner faces are electroded and the voids are either hlled by the polymer (which results in stiffer stmcture) or left empty and end-capped by the additional polymer plate. This configuration allows for higher effective hydrostatic figure of merit. Values as high as ... 

Similar to other rapid prototyping techniques, ACR s EFF process begins with a 3D drawing (AutoCAD,. DXF, etc...) of the component to be fabricated. The file is imported into ACR proprietary software and sliced into the individual layers and fill patterns which will be utilized to build the part. The fill pattern in each successive layer ultimately becomes an extrusion path for the EFF machine to follow while extruding the chosen material in the shape of the component being fabricated. 

LDPE production is a radical high-pressure process. Despite the high investment and higher operation cost related to this process, LDPE processes are still in use as the special branching pattern of the product cannot be achieved with low-pressure techniques. Some applications, for example, PE extrusion, require the properties of LDPE. 

UK), in which the basic technique is to emboss a pattern of parallel indentations onto the hot melt immediately after extrusion. This results in a series of continuous and uniform fibrils connected by relatively fine membranes extending across the film s width. The film is next divided into tapes of the required denier, and processed through drawing and winding operations. It is then twisted to produce a continuously fibrillated yarn (300-600 denier), with high tenacity (6.5-8.0 cN/ denier) and regular round cross section. 

In-line monitoring of EVA extrusion was carried out using in-line fibre optic Raman spectroscopy. Vinyl acetate content in the random copolymer and melt indices of various grades of the EVA were determined and vinyl acetate content in the samples correlated using linear least squares andPLS analysis. Hierarchical Cluster analysis was employed as a pattern recognition technique to follow the natural clustering tendencies of the EVA samples. 10 refs. 

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