Squeeze Casting: Eliminating Porosity in Aluminum Die Cast

Aluminum die casting is a widely used production process in industries requiring intricate metal components with high dimensional accuracy.

However, the presence of internal porosity poses a challenge to achieving optimal mechanical properties in aluminum die casting parts.

This article will explore the methods and strategies employed in controlling and preventing internal porosity in aluminum die casting, with a focus on the application of aluminum squeeze casting technology by CEX to produce high-quality, porosity-free aluminum components.

Understanding Internal Porosity in Aluminum Die Casting

Internal porosity refers to the presence of air or gas pockets within the structure of an aluminum die casting part.

These pores can significantly compromise the mechanical properties of the material, including tensile strength, ductility, and fatigue resistance.

The formation of internal porosity is influenced by various factors, including alloy composition, melt temperature, die design, and processing parameters.


Utilizing Aluminum Squeeze Casting for Porosity Control

Aluminum squeeze casting is an advanced manufacturing technique that combines the advantages of both die casting and forging processes.

This method involves injecting molten aluminum into a preheated steel die cavity under high pressure, followed by applying additional pressure during solidification to eliminate gas entrapment and minimize porosity formation.

CEX specializes in the application of aluminum squeeze casting technology to produce high-quality, porosity-free aluminum parts with superior mechanical properties.

squeeze casting process

Key Strategies for Porosity Control and Prevention

Alloy Selection: CEX adopts high-quality aluminum alloys with low gas solubility and minimum impurities to reduce the tendency of gas bubble formation during solidification.

Optimized Processing Parameters: precise control of melt temperature, injection pressure and squeeze pressure is crucial to minimize the formation of internal porosity and ensure uniform filling of the die cavity.

Mould Design Optimization: CEX applies advanced in-house mould design techniques, such as venting systems and optimized gating configurations, to facilitate the escape of trapped gases and promote smooth metal flow during casting.

Vacuum Assisted Casting: in critical applications, vacuum-assisted casting techniques may be used to further decrease gas entrapment and improve the density and integrity of the aluminum casting part.

Post-Casting Treatment: CEX carries out post-casting treatments, such as heat treatment and impregnation processes, to effectively seal any remaining pores and enhance the mechanical properties of the finished part.

CEX’s Commitment to Quality and Innovation

CEX is dedicated to providing high-quality aluminum casting parts with outstanding mechanical properties to meet the diverse requirements of our customers.

Through continuous research and development, CEX keeps leading the aluminum squeeze casting technology, providing innovative solutions for porosity control and prevention.

By applying advanced and patented aluminum squeeze casting technology and strict quality control under ISO 9001 and IATF 16949 systems, CEX guarantees that our products show superior performance, durability and reliability in various industrial applications.


By utilizing aluminum squeeze casting technology and following key strategies, such as alloy selection, optimized processing parameters, mould design optimization, and post-casting treatments, CEX demonstrates its ability to produce high-quality, porosity-free aluminum casting parts with superior mechanical performance.

As a leading manufacturer in this field, CEX keeps driving innovation and excellence in aluminum squeeze die casting, providing reliable solutions to meet the changing needs of our customers.

Update cookies preferences