Abstract
The weaving of virtually endless three-dimensional preforms where the height and width are of similar magnitude (e.g. 50 × 50cm) on a conventional loom is described. The term ‘conventional loom’ refers here to any kind of two-dimensional weaving machine, irrespective of whether it uses a shuttle or is shuttless. A software package has been developed which enables complete weaving instructions to be generated that can automatically control the operation of an electronic Jacquard machine. The principles applied in developing the software are described under two broad headings, i.e. the flattening of the preform so as to make it weavable on a conventional loom and the selection of the shuttle paths on which the weaving instructions are based. Weaving experiments based on these principles are reported. Theoretical and practical work is also described for producing preforms where two sets of threads are inclined to each other by an acute angle so that they could be orientated in the direction of the anticipated maximum stress.
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