Aluminum Gravity Casting

In order to better provide one-stop service to our customers, Innovaw continues to maintain a high level of investment in research and development in the field of gravity casting.
We will continue to introduce the industry's advanced gravity casting equipment.
We continue to improve the details of the gravity casting process in practice, the pursuit of each and every bit of progress.
We continue to study the material properties and the best application of different materials in the field of gravity casting.

1. Overview of the process

In gravity casting, the process of pouring molten metal into a reusable mold or die, where the molten metal flows from top to bottom under the force of gravity and flows to fill a designated model cavity, cooling and solidifying into shape. Molds are usually made of durable materials that can withstand high temperatures and reuse. The most common technique used in this process is tilt pour casting.

The process flow of low pressure casting includes the following major steps:

- Preparation of the Mold: The first step involves preparing the mold, which can be made from various materials, including metal or sand. The mold is often pre-heated to ensure better flow of the molten metal and to reduce the risk of thermal shock.

- Melting the Metal: The metal is melted in a crucible or furnace until it reaches a liquid state.

- Pouring the Molten Metal: Once the metal is ready, it is poured into the mold. This is done by tilting the ladle or using a pouring basin to direct the flow. The molten metal fills the mold cavity under the force of gravity, which helps minimize turbulence and oxidation, leading to better quality castings .

- Cooling and Solidification: After the mold is filled, the molten metal is allowed to cool and solidify. The cooling rate can affect the properties of the final casting, so it is important to manage this process carefully.

- Removing the Casting: Once the metal has solidified, the mold is opened, and the casting is removed. Any excess material is trimmed away.

2. Advantages of Gravity Casting

The Gravity Casting process offers several advantages:

- High Dimensional Accuracy: The gravity casting process is known for producing parts with exceptional dimensional accuracy. This precision is crucial for applications where tight tolerances are required.

- Good Surface Finish: Castings produced through gravity casting typically exhibit smoother surfaces compared to other methods.

- Superior Mechanical Properties: The process results in reduced porosity in the final products, which enhances their mechanical properties.

- Simplicity of Equipment: Gravity casting requires relatively simple equipment compared to pressure die casting methods. This simplicity allows for its use in traditional and low-tech foundry environments, making it accessible for various manufacturers.

- Cost-Effectiveness: While there may be higher initial tooling costs, gravity casting can be more economical for small to medium production runs due to the reusability of molds.