Lost-foam casting (Consumable-pattern casting)
In the process of lost-foam casting, high-precision consumable shell molds are used to obtain casting products. Lost-foam casting is a progressive method of casting.
By using this method:
- it becomes possible to produce castings of complex configuration;
- castings are produced with high precision (2-5 grades).
The disadvantage of this metal casting method is the complexity of the cast mold manufacturing process.
Lost-wax pattern (Investment pattern casting)
This method has visible similarities with the lost-foam casting method. Molds made of low-melting-point materials are used for metal casting. Most often it is a mixture of paraffin and stearin.
Parts are characterized by high precision and low surface roughness. This is achieved by using finely dispersed materials. Most often, this casting method is used for casting of: heat-resistant alloys, steel products, engine parts, turbines.
Permanent-mold casting is a metal casting process that employs permanent molds, usually made from metal. The production process of permanent-mold casting has its own peculiarity. The difference lies in the impossibility of mold destruction after casting. That is why the permanent mold is designed in such a way that the cast product can be removed by simply turning over the mold or splitting it in the joint planes.
Typically, permanent-mold casting is used to produce copper and aluminum alloy castings. The mass of parts made by metal mold casting does not exceed 250 kg. Permanent-mold casting has several advantages:
- simplicity of process automation;
- low surface roughness;
- low production cost price of cast products;
- high dimensional accuracy of cast products.
Permanent-mold casting has also has certain disadvantages:
- high cost and labor intensity of permanent mold manufacturing;
- tendency to the occurrence of internal stresses, cracks;
- limited stability of permanent mold
Permanent-mold casting method is most often used in serial and mass production.
Pressure-die casting is one of the most accurate casting methods, providing high quality and high precision casting products. Quite often, products made by using this casting method do not require additional machining. This is the most significant advantage of pressure-die casting.
The method is efficiently used only in serial and mass production. Locks, door and window handles, automobile parts are produced using this type of casting.
Sand-mold casting is a metal casting process in which molten metal is poured into a special mold made of a tightly compacted sand.
This type of casting makes it possible to manufacture large and heavy castings. Along with this, it is worth highlighting the high surface roughness, which is the main disadvantage of this casting method.
- forged parts
- rolled rings;
- artistic forging.