| 摘要 |
<p>PURPOSE:To sharply and certainly develop a joint pattern to a part or all of the outer periphery of a tile by molding the tile in a mold whose groove depth is made larger than the thickness of the first layer sheet and smaller than the sum of the thicknesses of the first and second layer sheets and removing the protruding part on the periphery of the molded tile so as to make said periphery flush with the central plane of the tile. CONSTITUTION:A joint forming groove 5 is provided to the entire periphery of a mold and the depth of the groove 5 is made larger than the thickness of the first layer sheet 1 and smaller than the sum of the thicknesses of the first and second layer sheets 1,2 to mold a tile. A tile surface material 1 and a joint part material 2 are separately compounded and kneaded to be formed into a sheet by a heating roll. A black rubber material for the rear base of the tile is compounded and kneaded to be formed into a sheet by a heating roll and three layers of the sheets 1,2,3 are successively charged in a mold having a recessed part and vulcanized under heating to perform press molding. The protruding part of the tile joint part of the molded product is ground and the joint part material 2 is made flush with the surface 1 of a tile.</p> |
