Research on Water Jet Cutting of Polymer Composites Based on Epoxy/Waste Fibres from Coconut Processing
This paper deals with a machining of polymer fibre composite materials reinforced with a waste from coconut processing by means of an unconventional technology, i.e. an abrasive water jet (AWJ) and a water jet (WJ). Short and long fibres from the waste/a by-product from the coconut processing were used as the reinforcement within the research. The composite material was made by a vacuum infusion method. These composite materials are difficult to cut by another cutting method. They are used as a design upper/view element which is applied on a basic material, e.g. chipboards. These materials have to be cut precisely according to requirements of a shape and dimensions of a final product, e.g. for furniture industry. The paper deals with a study of an influence of the abrasive water jet and the water jet at their impact on a surface of the machined polymer fibre composite material. SEM analysis proved that a considerable destruction of the material occurred at the water jet outlet, i.e. on a bottom side of the cut, under unsuitable cutting conditions and at an absence of the abrasive grains which is an undesirable factor for following applications of these materials.
KeywordsAWJ Biological reinforcement Cutting speed Kerf width Quality of cut SEM WJ
This paper has been made with the assistance of the grant IGA TF CZU (Research on mechanical properties of polymeric composite materials cut by water jet).
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