| 摘要 |
In a sheet structure of the type having comparatively rigid surface layers (1, 2) and an intermediate layer (3), e.g. of cellular material, located therebetween, the surface layers as well as the intermediate layer have projections and recesses facing each other and designed so that the projections (4) of the surface layers (1, 2) are received by recesses (7) of the intermediate layer and vice versa. In a method for production of such a sheet structure the intermediate layer is produced with projections (6) and recesses (7) on the lateral surfaces thereof and surface layer material is applied on these lateral surfaces, so that this fills the recesses (7) of the intermediate layer while forming surface layers having a thickness varying in correspondence with the projections and recesses of the intermediate layer. Alternatively, between surface layers (1, 2) positioned with respect to each other a material forming the intermediate layer may be injected, so that this fills up the volume between the surface layers and get a thickness varying in correspondence with the projections and recesses of the surface layers. |
