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Application of dry pressing die and release agent in ceramic dry pressing

Dec 20, 2018

When performing the ceramic dry press forming process, not only must the corresponding dry pressing mold be matched, but also a matching release agent, otherwise the workpiece cannot be smoothly removed from the dry pressing mold, and even affects the quality of the mold and the product. Of course, the production and maintenance of dry pressing molds is also a part that cannot be ignored.

In this case, firstly speaking, the release agent used for ceramic dry pressing molds can be mainly divided into three categories, one is wax series release agent, such as plant and animal synthetic paraffin; microcrystalline paraffin; polyethylene wax Wait. The other type is a series of inorganic powder release agents, including talc, mica, clay, white clay and the like.

Another type is fluorine series release agent, which refers to polytetrafluoroethylene, fluororesin powder, fluororesin coating, etc. As a release agent for dry pressing mold, it has the advantages of good isolation, small pollution to the mold, and disadvantages. It is high cost and limits the use of a wide range.

In order to obtain the desired effect of dry pressing, the production of dry pressing mold is more critical, and it must have the conditions of good gas permeability, smooth and uniform drainage, and long service life. In order to achieve the above quality requirements, a metal mold frame is used in the production process to prevent the mold from being damaged.

Secondly, it is necessary to pay attention to the material quality and modulation process used for dry pressing molds; in order to extend the strength and service life of the dry pressing mold, a steel mesh and a ventilation pipe can be arranged inside, so that the compressed air can enter the dry pressing mold to achieve The purpose of blowing and demolding.

Proper use and maintenance are also very necessary for dry-pressing molds. They should be properly stored and stored in the long-term unsuitable condition. Regularly blow the air to clear and observe the water content. Before using, check whether the dry pressing mold is used to meet the requirements.