Daily ceramic blanks usually refer to the batching and processing of ceramic raw materials to form a multi-component mixture with forming properties that meet quality requirements for forming. According to the forming method of the product, the blank has Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe different characteristics. The plastic forming mud with a moisture content of 19% to 26% and a slurry for grouting with a moisture content of 30% to 35% are prepared with a moisture content of 4% to 35%. 7% of the powder used for dry pressing and the slurry used for hot-press injection molding or the wax cake after uniform mixing of dry powder and wax have different preparation processes, which should be based on the characteristics of the raw Insulating Silicon Nitride Ceramic Locating Block Tile materials used, equipment usage conditions, production scale, The product quality requirements and the technical and economic indicators of the preparation process itself are selected. Improper processing methods or process control of bad materials will not only reduce production efficiency and increase production costs, but also affect the process performance of the blank and the performance of the product. Forming Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe
The forming of ceramic products is to use different methods to make blanks with a certain shape and size. According to the difference in the moisture Insulating Silicon Nitride Ceramic Locating Block Tile content and performance of the blank, the forming methods of ceramics are divided into plasticizing method, grouting method and pressing method.
(1) Plastic forming
Plastic forming is a method of plastically deforming a plastic blank under the action of external force to make a blank. Due to the different external forces and operating methods, the plastic forming of target ceramics can be divided into two categories: manual forming and mechanical forming. Sculptures, printed blanks, drawn blanks, hand kneading, etc. belong to manual forming. These forming methods are relatively old and are mostly used for artistic ceramics. Manufacturing. Spinning and roll forming are currently widely used mechanical forming methods in factories and can be used for the production of plates, bowls, cups and saucers. In addition, plastic forming methods such as extrusion, car blanks, pressing, and film rolling are also used in other ceramic industries.
(2) Grouting method forming
Grouting is a method of injecting mud Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe into the porous model by using the water absorption of the porous model. This method of forming is highly adaptable. Anything with complex shapes, irregular thin-walled, thick tires, large volume and less stringent size requirements All products can be formed by grouting. For example, vases, soup bowls, oval plates, teapot handles, etc. in daily ceramics can all be formed by grouting.
After grouting, the structure of the green Insulating Silicon Nitride Ceramic Locating Block Tile body is uniform, but its moisture content is large and uneven, and the drying shrinkage and firing shrinkage are large.
In addition, from the production process, the production cycle is long, manual operations are many, labor intensity is large, the area is large, and the model consumption is large. With the continuous progress of production technology and the continuous development of grouting machinery, these problems will be improved and solved, so that grouting is more suitable for modern ceramic production.
(3) Forming by pressing method
Press forming is a forming method that uses pressure to compact the powder placed in the mold to a compact structure to become a green body with a certain shape and size. According to the moisture content of the powder, it can be divided into dry press forming (moisture content less than 6%) and semi-dry press forming (moisture content 6% to 14%). The compacted body has low moisture content, Heat Resistant Si3n4 Silicon Nitride Ceramic Bush Pipe compact body and dry shrinkage. Small, accurate product shape and size, high quality. In addition, the forming process is simple and the production volume is large, which is convenient for mechanized mass production, for flat systems with regular geometric shapes.
How many kinds of ceramic moulding?
2020 09/07