Differences and characteristics between aluminium alloy pressure casting and gravity casting
Author: SAIVS Date Published: May 16,2023
aluminum alloys are widely used in automobile manufacturing, aerospace, shipbuilding and other fields due to their good plasticity, corrosion resistance and lightweight characteristics. With the development of Chinese manufacturing industry, the demand for aluminium alloy and aluminium alloy castings is increasing constantly, which will also promote the development of aluminium alloy casting industry. At present, the casting methods of aluminium alloy are divided into pressure casting and gravity casting. In this paper, the differences and characteristics of the two casting processes are analyzed in detail.
Aluminum alloy casting process is roughly divided into two types: gravity casting and pressure casting.
Aluminum alloy pressure casting refers to the process by which liquid metal is injected into the mold under other external forces (without gravity). Pressure casting is divided into high pressure casting and low pressure casting.
High pressure casting is commonly referred to as Die Casting, in which liquid aluminium is poured into the chamber, filled into the mold cavity at high speed through its pressure, and solidified under pressure to form aluminium castings.
The characteristics of aluminium alloy die castings are:
1. The product has a good surface finish, generally up to Ra6.3 or even up to Ra1.6.
2. It can not be heat treated.
3. The products have high air tightness, high strength and surface hardness, but low elongation.
4. Mold cost is high and service life is short.
5. High production efficiency.
6. Thin-walled parts can be produced with small machining allowance.
Gravity casting of aluminium alloy refers to the process of injecting liquid aluminium into the casting mold under the action of the earth's gravity. Gravity casting can be divided into Sand Casting, metal casting (steel casting) and lost foam casting.
At present, the most widely used is metal mold (steel mold), which is made of heat-resistant alloy steel. The strength, size and appearance of cast aluminium are higher than those of other casting processes.
The liquid aluminium in gravity casting is usually poured into the gate by hand, and the sample is obtained by filling the cavity, exhausting, cooling and opening the mould with the weight of the liquid metal. The process flow is generally aluminum melting, filling, exhaust, cooling, opening, cleaning, heat treatment and processing.
Gravity casting of aluminium alloys is characterized by:
1. Product surface finish is not high and pits are easy to occur after shot blasting.
2. aluminum castings have few internal pores and can be heat treated.
3. The product has low density and slightly poor strength, but high elongation.
4. Low cost and long service life of dies.
5. Low production efficiency, which increases production costs.
6. The process is simple and unsuitable for producing thin-walled parts.
When choosing which process to produce the product, the choice is mainly based on the wall thickness of the workpiece. When the wall thickness of the product is more than 8mm, die casting will cause a lot of pores to be stored in the wall. Therefore, the products with thicker wall thickness can be finished by gravity casting.
Why Choose SAIVS™ as Your Supplier？
1.Superb Quality Control Management
At SAIVS, we take pride in our perfect quality management systems and procedures, which guarantees the excellent performance of all our producs, being a professional Investment Casting | Die Casting| Sand Castingmanufacturer in China.
2.Rich Production Experience
With 20 years of experience in production, SAIVS has a deep understanding of the market and trends, and strives for continuous research and innovation. This has created advantages in both the product's performance and appearance.
As a Chinese factory committed to becoming the most cost-effective Investment Casting | Die Casting| Sand Castingexporter in China, SAIVS provides high-quality products at advantageous prices. By lowering costs and increasing efficiency, we ensure that our customers receive the best possible value for their investment.
4.Perfect After-sales Service
At SAIVS, we strive to provide superior customer service that meets and exceeds expectations. We are always available for any questions or concerns you may have, and we stand by our commitment to providing excellent after-sales support.
What is the process of gravity casting
What is Gravity Casting?Gravity casting, also known as gravity die casting or permanent mold casting, is a casting process used to produce high-quality metal pa...
How Casting Simulation Improves Metal Casting Quality
Casting is a manufacturing process in which molten metal is poured into a mold and allowed to solidify. It is a versatile process that can be used to produce a ...
Technical Requirements for Investment Casting
Throughout the production process, precision casting solidifies its liquid immediately at room temperature and pours the compound into its unique die casting di...
What are the requirements for precision die casting?
Precision die casting is an advanced forming technology for precise metal parts. It refers specifically to precise manufacturing technology, which makes liquid ...
Cold Forging And Hot Forging:What Is The Difference
Forging is a widely used manufacturing process that involves shaping metal by applying compressive forces.Two primary methods of forging are hot forging and col...
The Effective Uses of Sand Casting for Construction Machinery Parts
The construction machinery industry requires the production of big parts that have shapes, sizes, and complexities that are not easy to produce by conventional ...