| 摘要 |
A trailer (2) or caravan for coupling to a towing vehicle is normally composed of a series of different materials which react differently to temperature variations and moisture. Also, their corrosive characterisitics are very different and herewith also their lifetime and thus the lifetime of the trailer. The production of the known trailers with said diverse materials requires considerable working operations, and involves up to several different trade groups in connection with the assembly. With the object of achieving longer lifetime, less weight and herewith greater loading capacity, and also lower production costs, a trailer (2) of the kind disclosed is characterised in that the superstructure (6), the chassis (4) and towing-bar/triangle (8) consist of one and the same self-supporting construction of composite materials comprising external shells between which a core of suitable core material is placed. A method and a mould are also disclosed for the forming of items (16) of PVC-based cellular plastic.
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