| 摘要 |
<p>A method and an installation for producing moulded articles of foamed plastic material having stiffening portions or stiffeners preformed by spraying onto the internal surfaces of the mould which are subsequently embedded into the body of the moulded article. According to the invention, the stiffeners (15, 17) are preformed in the same mould (1) for the article to be moulded, by spraying a quick-reacting mixture of a first plastic material having definite physical and/or mechanical properties, which adheres in pre-established positions to the internal surface of the mould (1). Then a foamable mixture (16) of a second plastic material having physical and/or mechanical properties different to those of the first material, is fed into the cavity of the mould (1), embedding the preformed stiffeners (15, 17).</p> |
