Pultrusion process resin transfer moulding

In order to minimise the number of variables within the programme it was decided to restrict the processes to the minimum feasible number commensurate with producing a valid code. Hence three of the primary processes have been specifically denoted as within the scope of the code. They are hand lay up, pultrusion and resin transfer moulding (RTM). These have been identified as a sensible, minimum range of processes which are necessary to produce components for construction applications. 

Manufacturing methods for composites vary from manual to fully automated processes, whereby the latter have better quality control than the former. Wet layup, pultrusion, and filament winding are all discussed in some detail, while other techniques such as pull-winding, resin transfer moulding, vacuum bag moulding, and injection moulding are left to specialized composite materials texts. 

Closed mould (or matched-die moulding) processes are used in the composites industry for fabrication and manufacturing of three dimensional compounds and products. There are different closed moulding processes. Within these, there are transfer moulding, compression moulding, resin injection moulding, injection moulding, pultrusion and extrusion. 

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