plastics articles with continuous reinforcement strands are normally produced by pultrusion . pultrusion methods are known for producing straight or curved plastics profiles . it has not hitherto been possible for reinforced plastics articles of more complex form to be produced by pultrusion methods . the invention provides a pultrusion method in which a part of a curved plastics article serves , together with a mold , for the pultrusion of a reinforced plastics article . in this way , it is possible for complex plastics articles , for example a plastics pipe , to be produced by pultrusion .