| 摘要 |
In the method of producing slabs made of granulated stone materials and/or sand bound with a hardenable resin by compaction under vacuum and subsequent hardening of the resulting raw slab, in which, before the vibratory compaction, the mixture (26) is spread with substantially uniform thickness on a support (20), the said support (20) being protected by a highly resilient sheet material, the flat configuration of the lower sheet is replaced by a shaped configuration comprising a flat base (120b) and a peripheral frame (120a) projecting from the flat base (120b) for a predetermined height so as to define a seat of dimensions corresponding in plan to those of the slab to be produced, the aforementioned peripheral frame (120a) having a height which is lower by a predetermined amount than that of the final slab to be produced so that, when the completely flat upper sheet (132) is placed on the upper surface of the mixture (26), a space (100a) of predetermined depth remains between the peripheral edge of the upper sheet and the top of the aforementioned frame.
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