| 摘要 |
<p>The present invention relates to methods for reinforcing articles formed from sheet materials such as plastics and fibreglass materials. Essentially the reinforcing method comprises forming reinforcing projections 4, which extend out from the surface of the sheet material, by pinching together two adjacent areas 5,6 of the sheet material 1 between gaps 3 of movable moulds 2, attaching those two adjacent areas to each other by known means such as with adhesives or by chemical bonding. Conventionally sheet materials are reinforced by attaching separate projecting ribs or reinforcements to the sheet material whereas in the present invention the reinforcement is formed from the sheet material itself and forms an integral part of the sheet material. The present invention is particularly useful for use in sheet materials used in the building industry e.g. in the cladding of buildings, walls of buildings, curtain walling and roofs. Strips of metal may be inserted between or on either side of areas 5,6 as additional reinforcements. <IMAGE></p> |
