
Electro-Magnetic Low Pressure Semi Permanent Mold Aluminum Casting
Alcast Company utilizes the Mitchener Molding Machine an advanced Electro-Magnetic Low-Pressure Semi-Permanent Mold Aluminum Casting process refined technique that has been perfected over 50 years in our aluminum foundry. This method enhances metal flow, reduces turbulence, and ensures superior metallurgical integrity, making it ideal for high-performance aluminum components.
A key advantage of this process is the integration of sand cores, allowing for complex geometries, including hollows, undercuts, and negative draft angles—features that are not feasible with conventional permanent mold casting. This flexibility enables engineers to optimize part design for weight reduction, mechanical properties, and manufacturability.
To further enhance precision and efficiency, we manufacture shell sand cores in-house as a value-added service. This ensures seamless integration, tight dimensional control, and cost-effective production while expanding design possibilities.
For engineers seeking high-integrity aluminum castings with complex geometries and superior material properties, Alcast’s Mitchener Molding Machine electro-magnetic low-pressure casting technology offers an innovative solution.
What is Semi Permanent Mold Aluminum Casting?
Semi Permanent Mold Aluminum Casting is very similar to the low pressure, permanent mold process used at Alcast, with just one exception. Our expendable shell cores are used in conjunction with the mold. One sand cores, multiple cores, or an assembly of cores are inserted into the mold before casting and will later be sand blasted or baked out before or during the heat treating process.
This casting process allows for much more complex aluminum castings to be produced in our aluminum foundry, such as: torque converters, valve bodies, blowers, and more. We are also still able to provide exceptionally smooth surface finishes using this process because of the shell sand core process Alcast uses.
Semi Permanent Mold Features
- On site Shell Core Manufacturing
- Hollow Castings
- Manage Undercuts
- Negative and Zero Draft Ability
- Simple to Complex Cores
- 4 Redford 16's
- 1 Redford 22
- 2 Redford 43's
- 1 Harrison 1818
- 12 Proprietary Machines
- 3 Shalco U-360's
- 3 U360 Shell Core Machines


Semi Permanent Mold Benefits
- Endless Design Possibilities
- Lighter Parts per Hollow
- Complex Becomes Simple
- Convert Sand Castings
- 30 Years Experience
- High Quality Shell Sand Cores
Request Your Aluminum Casting Quote
If you’re looking for high-quality aluminum castings with precision, strength, and a superior finish, our advanced permanent mold casting process is the perfect solution. Contact us today to discuss your custom casting needs and experience the difference for yourself. Request your quote now to learn more.