PERMANENT MOLD CASTING

What is permanent mold casting?

Permanent mold casting, also known as gravity die casting or permold, is a metal casting process. It uses gravity to pour molten aluminum into a reusable steel mold. At LA Aluminum, we design and manufacture both the molds and the final aluminum parts.

Why Choose Permanent Mold Casting?

This method offers a cost-effective alternative to traditional fabrication. Many customers switch from welded steel or iron assemblies to aluminum castings. As a result, they benefit from lighter, stronger parts that reduce labor and eliminate assembly steps.

Lower Costs, Higher Value

Aluminum castings are not only lighter but also more efficient to produce. They reduce material waste and require less post-processing. This leads to lower production costs and faster turnaround times.

Design Improvements That Save

Our team often recommends design changes to improve part performance. These adjustments can reduce weight, enhance functionality, or simplify manufacturing. In many cases, these changes lead to significant cost savings.

Durable and Reusable Molds

Unlike sand casting, permanent molds are reusable. This makes them ideal for medium to high-volume production. The result is consistent quality and better dimensional accuracy.

Partner With LA Aluminum

With decades of experience, LA Aluminum delivers reliable, high-quality castings. We guide you from design to production, ensuring optimal results every step of the way.

Higher Production Rates

The mold doesn't have to be remade each time-- it's permanent! That's why higher production rates are possible. Permanent molds can produce tens of thousands of parts throughout their lifetime.

Lower Labor Costs

Higher production rates means productivity is increased. Increased productivity results in a lower price.

Weight Reduction

The higher strength properties produced by the permanent mold process permit castings with thinner walls. The resultant weight savings ultimately means cost savings-- both material costs and shipping costs

Lower Machining Costs

Closer dimensional tolerances made possible by permanent mold castings and the option of casting inserts such as threaded steel inserts, nuts, and bushings into the casting minimize required machining.

Smoother Surface Finishes

Smoother surface finishes, typically 125-300 RMS reduce polishing costs.

SOUNDNESS

Of the three basic types of castings- die, sand and permanent mold- permanent mold gives the soundest casting overall.

Strength

The chilling effect of the metal mold produces fine grain structures which significantly enhance physical properties. Elongation is 50%-100% greater and other mechanical properties are from 20%-25% greater than sand castings of the same alloy.

Low Porosity

Permanent mold castings are less susceptible to gas entrapment than that of sand castings or die castings.

Review our Casting Method Comparison and other Tech Specs.

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Talk with one of our casting specialists for more information.

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