Moulding tray for manufacturing slabs made of agglomerate material, method for realizing such moulding tray and method for manufacturing slabs made of agglomerate material

A moulding tray for manufacturing slabs made of agglomerate material from a mix, the tray comprising a base portion;

• wherein the base portion comprises at least one surface layer made of elastomeric material and at least one fabric layer;
• wherein said moulding tray comprises a rim portion made of elastomeric material and designed to delimit together with said base portion a cavity for containing the mix, the elastomeric material of the rim portion and the elastomeric material of the at least one surface layer of the base portion comprising a filler containing silicon;
• and
• characterized in that said at least one surface layer of the base portion and said rim portion are independent parts of the moulding tray and that the elastomeric material of the rim portion and the elastomeric material of the at least one surface layer of the base portion are chosen from the group comprising ethylene-propylene rubbers (EPM) and ethylene-propylene-diene monomer rubbers (EPDM).