Preparation method of ceramic tile back grains

Abstract

The invention belongs to the technical field of architectural ceramics, and particularly discloses a preparation method of back grains of a ceramic tile. The surface material layer, the back pattern layer and the bottom material layer are arranged in sequence, and the ceramic tile is prepared through compression molding, drying and sintering. The back pattern layer contains a pore-foaming agent, and the back pattern layer and the backing material layer are seamlessly spliced and located at the same horizontal plane height. A processing mode of combining material distribution and pore forming is adopted, powder added with a pore-foaming agent is directly distributed on the back grain layer, irregular isolated holes, communicating holes or groove structures are formed after the pore-foaming agent is sintered at high temperature and serve as back grains of the ceramic tile, and a traditional back grain mold pressing process can be replaced. The flexible and diversified back grain layer is realized by means of digital cloth, the limitation of traditional mould pressing on back grain patterns is eliminated, the cross section of a pore structure formed by a pore-foaming agent has irregularity, and compared with a flat surface formed by a mould, the contact area of an adhesive can be increased during paving and bonding, so that the bonding strength of the ceramic tile is improved, and the service life of the ceramic tile is prolonged. And the pulling strength of the ceramic wall and floor tiles during paving can reach 0.3 MPa or above.

Description

technical field [0001] The invention belongs to the technical field of architectural ceramics, and in particular relates to a method for preparing ceramic brick back grain. Background technique [0002] In recent years, with the continuous improvement of residents' living standards, more and more ceramic tiles are used for decoration in ordinary homes, offices, and municipal projects. At present, with the continuous improvement of the tonnage of presses and the continuous improvement of inkjet printing technology, ceramic tiles are gradually tending to larger and thinner ceramic rock slabs, which also brings certain difficulties to paving. Generally, the water absorption rate of porcelain tiles is below 0.5wt%, and some products even have a water absorption rate lower than 0.01wt%. Forming a firm paste effect, it is easy to appear hollow in the local area, causing the tiles to deform or even fall off. [0003] The concave-convex back pattern with a certain groove is provid...

AI Technical Summary

Problems solved by technology

At present, the background pattern of ceramic tiles is mainly formed by mold pressing, but because the mold pressing can only be carried out in the vertical direction, the texture of the background pattern cannot be set arbitrarily due to the limitation of the pressing process, so it is difficult to increase the size of the ceramic tile by changing the shape of the background pattern. Adhesive strength of paving

At the same time, when pressing with a mold, the depth of the groove of the back pattern should not be too large, otherwise it is easy to cause a density difference in the concave and convex parts of the ceramic tile and reduce the flexural strength of the tile body.

In addition, the cost of mold opening is relatively high. In order to meet the requirements of paving and bonding of products of different specifications and models, it is necessary to frequently replace the mold of the press, which increases the production cost of the enterprise.

Images