| 摘要 |
1. A method for the production of a moulded body, especially a plate consisting of at least two polystyrene foam materials of different density, in which respect various polystyrene starting materials are introduced successively into mould portions, formed by an adjustable mould wall, of a moulding box, are foamed by vapour blasting and partially hardened and in which respect, after the introduction of the last polystyrene starting material, the moulded body is completely hardened and the portions are connected together, characterised in that in each case the foamed polystyrene material of small density after the foaming is allowed to expand by retraction of the adjustable mould wall upon the relaxing and cooling by a fraction of the filling width of the mould portion and is in conclusion compressed by means of the mould wall to a fraction of the filling width. |
