Precision ceramic dry pressing mold product

Principle of precision ceramic dry pressing mold

After granulation, the material with good fluidity and suitable particle gradation is loaded into the metal mold cavity. The pressure head moves in the mold cavity and transmits the pressure, causing the row of powder particles in the mold cavity to deform and be compacted, forming a certain strength and shape of the ceramic mold base.

Dry pressing refers to a body forming method commonly used in ceramic manufacturing. The powder is granulated by adding a small amount of binder, then put into a mold and pressurized on a press to bring the powder particles close to each other in the mold and firmly bond with internal friction to form a green body of a certain shape. Induction heating surface heat treatment. Dry press molding is to put powder (containing 5% to 8% moisture) into a metal mold and compress it under the action of force (usually one-way pressure). The gas in the interstices of the blank is partially expelled and the particles are displaced. As the particles are pressed into the mold, they gradually approach each other and bite into each other, eventually forming a green body with the same cross section as the mold, and the shape of the top and bottom is determined by the upper and lower indenters of the mold. The size of the holes in the molded body is much smaller, the number is greatly reduced, the density is greatly increased, and it has a certain strength.

Advantages of precision ceramic dry pressing molds

The size of the product body is accurate and the operation is simple.

The dry-pressed green body contains less moisture and binder, and the drying and firing shrinkage is smaller. It is mainly used to form products with simple shapes and small aspect ratio.

Under the action of external force, the powder particles are brought close to each other in the mold and firmly bonded by friction to maintain a certain shape.