What types of graphite moulds are available and what aspects are applied
時(shí)間：2022-09-09瀏覽次數(shù)：2114In recent years, due to its excellent physical and chemical properties, graphite has gradually become a suitable mold material.Graphite mouldIt has excellent performance characteristics and can be used in many aspects. Next, let's look at the types of graphite molds and their applications.
Graphite mould for continuous casting and semi continuous casting of nonferrous metals
With the promotion of advanced manufacturing methods at home and abroad, such as directly and continuously (or semi continuously) manufacturing steel bars and pipes with molten metal. This method has been applied to copper, copper alloy, aluminum, aluminum alloy, etc. in China. Artificial graphite is considered to be a good material for continuous and semi continuous casting moulds of nonferrous metals. Due to the use of graphite mould, due to its good thermal conductivity (which determines the solidification speed of metal or alloy), good self-lubricating performance of mould and other factors, the casting speed is not only improved, but also due to the size of ingot. The surface is precise and smooth, and the crystal structure is uniform, which can be directly processed by the following processes: this not only significantly improves the output and reduces the waste loss, but also significantly improves the product quality.
Die casting die
Artificial graphite material has been successfully used in non-ferrous metal die casting. For example, the castings of zinc alloy and copper alloy produced by the pressure casting mould of artificial graphite material are used for automobile parts.
Graphite mould for centrifugal casting
Graphite mould has been successfully used in centrifugal casting. Bronze sleeves are centrifugally cast in the United States using artificial graphite molds with a wall thickness of 25 mm or greater. Some anti-oxidation measures can be taken to prevent the combustion of artificial graphite. After casting a certain number of castings, if the inner surface of the mold is found to be scorched, the size of the inner hole of the mold can be increased to cast a large casing.
Hot pressing die
The hot pressing die of artificial graphite for pressure sintering of cemented carbide has the following characteristics: First, the pressure temperature is increased to 1350-1450 degrees, and the required unit pressure can be reduced to 67-100kgf/cm? (i.e., 1/10 of the cold pressing pressure); Secondly, pressing and heating are carried out in the same process, and compact sinter can be obtained after a short time of sintering.
Glass forming mould
Due to the chemical stability of the graphite material, it is not easy to penetrate into the molten glass and does not change the composition of the glass. Graphite material has good thermal shock resistance, and its size changes little with temperature, so it has become an indispensable material in glass manufacturing industry in recent years. Mold materials for manufacturing glass tubes, elbows, funnels and other special-shaped glass bottles.
Glass forming mould
Due to the chemical stability of the graphite material, it is not easy to penetrate into the molten glass and does not change the composition of the glass. Graphite material has good thermal shock resistance, and its size changes little with temperature, so it has become an indispensable material in glass manufacturing industry in recent years. Mold materials for manufacturing glass tubes, elbows, funnels and other special-shaped glass bottles.
From the above, it can be seen that graphite mold has many uses, and is used in different fields. For example, the die casting mold is used to produce automobile parts by manually manufacturing colored metal die casting.
