In the past, many ceramic blanks were made by atmospheric pressure grouting. However, this process has a series of problems in practical applications. In order to overcome the shortcomings of the existing grouting process, a high pressure has been introduced. Grouting technology, then what is the corresponding ceramic mold?
The so-called high-pressure grouting molding is to directly press the slurry into the ceramic mold, and keep the slurry under a certain pressure for a certain period of time, so that the slurry is quickly filled inside the ceramic mold and under the action of high pressure Moisture moisture is squeezed into the mold and discharged, so that the blank can be formed and peeled off in about 5 minutes.
Since the high-pressure grouting process makes the preparation of the ceramic blanks high, the demand for the number of ceramic molds is reduced under the same capacity, and the demand for the land area is reduced; in addition, due to the high-pressure grouting The slurry has a fast flow rate, strong ability to break through the resistance, and greater compactness and uniformity, so it is widely used.
However, for the high-pressure grouting process, the traditional ceramic mold obviously cannot meet the requirements, so it is urgent to use a ceramic mold with high strength and water permeability to be applied in the high-pressure grouting process. To this end, a special ceramic mold was specially designed.
The ceramic mold mainly comprises an outer mold, a support plate, a steel sleeve, a sealing ring and the like. Since K gypsum is used instead of the traditional gypsum, it not only has good water absorption and gas permeability but also has greater strength; In addition, the arrangement of the steel sleeve effectively restrains the expansion deformation of the K gypsum mold during high pressure grouting to prevent the ceramic mold from being damaged.