| 摘要 |
During the manufacture of slabs of ceramic material from a mixture formed by a grannulated material and by an inorganic binding phase, the starting mixture is spread on a support constituted by a mechanically resistant fabric or felt covered with a layer or sheet of release material permeable to water vapour such as paper, and the layer of mixture is covered with a protective sheet of release material, preferably rubber, after which forming is carried out by the application of a compacting pressure under vacuum combined with the simultaneous application of a vibratory motion; the resulting raw slab is released from the rubber sheet, transferred by pincer means to a support or metal grid used for the drying and firing steps, and is then sent to a drying oven after which, when the felt sheet has been removed, the visible surface is covered with a layer of refractory material and the raw slab is turned over and sent to the firing kiln where the permeable paper is removed by burning.
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