Grinding, polishing and dust removal During the process of scraping, grinding, and polishing, the closed pores on the surface of the brick blank will become open pores. At the same time, a large number of fine small cracks will be generated under the external mechanical force. This phenomenon is inevitable and unavoidable The open pores and micro-cracks are the root cause of the contamination. The more open pores and micro-cracks on the brick surface, the more serious the contamination. Therefore, the polished tiles have been treated with anti-fouling before leaving the factory. The brick surface is coated with antifouling wax, and the open air holes and microcracks of the brick surface are filled with the antifouling wax.
However, as far as the current situation of the entire polished tile industry is concerned, the pollution defect has not been fundamentally resolved, and there are many manufacturers complained of pollution, including high-end brands and low-end brands. As the quality control and after-sales staff, the author explores the causes and solutions of soiling from two aspects of product essence and use, with a view to introducing new ideas.
In terms of the essence of the product, first, the number of pores on the surface of the polished tile determines the internal quality of the brick. The more pores, the greater the possibility of staining, and the less pores, the lesser the possibility of staining. To solve this problem Only by starting with the two steps of raw materials and firing, on the one hand, reduce the content of volatile matter in the raw materials; on the other hand, formulate a reasonable firing curve, enter the vitrification stage after full oxidation, and reduce the amount of bubbles in the brick.