Casting process is a very important link in aluminum product processing. In the production of aluminum products, gravity casting and low-pressure casting are two very common processes. They each have their advantages and disadvantages. This article will introduce their characteristics in detail.

1. Gravity casting process

Gravity casting refers to a method of making products by pouring molten aluminum liquid directly into a mold based on the principle of gravity.

Advantages: 

1. Relatively low cost: The tooling production of gravity casting process is relatively simple, and its cost is relatively low compared to other casting processes.

2. High production efficiency: Gravity casting has greatly improved production efficiency compared to traditional sand casting technology.

3. High one-time molding rate: The molding rate of gravity casting process can reach more than 90%.

4. High quality of finished products: The finished products of gravity casting process have high precision and relatively good surface quality.

Disadvantages:

1. Relatively small product size: The product size of gravity casting process is relatively small.

2. Small boiler volume: The volume of aluminum liquid is small, and the single production volume is not high.

2. Low-pressure casting process

4.Low-pressure casting refers to the process in which aluminum liquid flows into the mold under pressure for solidification.

Advantages:

1. High pressure: The pressure of the low-pressure casting process can reach dozens of atmospheres, so that the aluminum liquid can fully fill every detail in the mold.

2. Wide range of applications: Low-pressure casting is suitable for the production of various aluminum products.

3. Good sealing of finished products: Low-pressure casting products have good sealing and are suitable for the manufacture of high-precision aluminum products.

4. High one-time molding rate: The low-pressure casting process has a high one-time molding rate and greatly improves production efficiency.

Disadvantages:

1. High manufacturing cost: The cost of low-pressure casting is high, mainly due to the high cost of tooling manufacturing and maintenance.

2. Complex operation: The operation of low-pressure casting is difficult, and the staff needs to master the technology proficiently.

3. Boiler volume limit: The volume of aluminum liquid is small, and the single production volume is not high.

3. The difference between gravity casting and low-pressure casting

The biggest difference between gravity casting and low-pressure casting is the pressure of the aluminum liquid entering the mold during casting. Gravity casting uses gravity to pour into the mold from top to bottom, while low-pressure casting uses mechanical pressure to make the aluminum liquid fully fill every detail of the mold. In addition, gravity casting has a lower cost, but a narrow range of application and relatively low production efficiency. Low-pressure casting has a higher cost, but a wide range of application and relatively high production efficiency.

4. Summary

Gravity casting and low-pressure casting each have their own advantages and disadvantages. As a professional aluminum product manufacturer, when choosing a casting process, it is necessary to comprehensively consider factors such as product characteristics, size, requirements, etc. to make the right choice. Our company's practice has proved that in the production of aluminum products, choosing a suitable casting process according to the specific situation can greatly improve the performance of various aspects such as delivery time, production efficiency, and finished product quality.