One-Stop Precision Metal Manufacturing from Mold to Delivery

Aluminum Die Casting Housings for a Korean Automation Equipment Maker

2026-09-24

The Project

A South Korean manufacturer of industrial automation equipment approached us for a series of aluminum housings that would protect sensitive internal components while keeping overall machine weight down. These housings needed to serve as both structural frames and heat-dissipating enclosures, meaning wall thickness, surface finish, and dimensional consistency mattered equally. The client planned to roll out the equipment across multiple production lines, so the parts had to be repeatable from the first shot to the ten-thousandth.

The Challenge

The client had three non-negotiable requirements that often pull in opposite directions.

Strong structure. The housings needed to withstand assembly torque, transport vibration, and years of factory-floor use without cracking or deforming. Thin walls would save weight but could compromise rigidity in critical mounting areas.

Lightweight design. Every gram counted. The automation equipment was part of a larger moving system where excess weight meant slower cycle times and higher energy consumption. The housing had to protect internals without becoming dead weight.

High production consistency. This was not a one-off prototype run. The client needed thousands of identical units with uniform surface quality, consistent thread depths after machining, and stable dimensions so sealing gaskets would seat properly every time. Variation between batches would trigger costly incoming inspections and assembly delays at their end.

They needed a supplier who could balance these trade-offs through smart mold design and controlled processing—not just by thickening every wall and calling it safe.

Our Approach

We started with mold development in-house, designing the die casting tooling to achieve the thin-wall sections the client wanted while maintaining adequate material flow to prevent cold shuts or porosity in the thicker mounting bosses.

Aluminum die casting. We used high-pressure aluminum die casting to form the complex housing geometry in a single shot, including internal ribs, mounting posts, and cooling fins that would have required expensive machining from solid billet. The as-cast surface provided a solid foundation for subsequent finishing.

CNC finishing. After casting, we precision-machined critical mating surfaces, threaded holes, and sealing flanges to ensure the housings would align cleanly with the client's cover plates and internal modules. This hybrid approach—cast the complex shape, machine the precision interfaces—delivered both structural integrity and accurate assembly.

Surface treatment. We applied the specified surface finish to improve appearance quality and provide a uniform protective layer across the entire housing. The treated surface also held up better during final assembly, resisting scratches and fingerprints that would have marred raw castings.

Throughout production, we monitored key dimensions at the die casting stage and again after CNC finishing to catch drift before it became a batch problem.

The Result

The housings moved into the client's assembly line without incoming rework or selective fitting. The production data held steady across multiple lot releases.

Reduced component weight. The optimized aluminum casting design achieved the strength requirements at a significantly lower weight than a machined-from-solid alternative, helping the client meet their overall equipment weight target.
Improved appearance quality. The combination of controlled casting parameters and proper surface finishing delivered a clean, professional look that matched the client's brand standards for industrial equipment.
Stable mass production. Dimensional consistency held lot after lot, allowing the client to reduce incoming inspection overhead and move parts straight into assembly. The mold held up through the production run without degradation in part quality.

What This Means for Your Project

If you are developing automation equipment and need aluminum housings that balance strength, weight, and appearance—without managing three different suppliers for casting, machining, and finishing—we can handle the full cycle in-house. From mold design to surface treatment, we deliver parts that fit your assembly and hold up on the factory floor.

Need aluminum die cast housings for your next equipment generation? Send us your drawings and we will review the design for manufacturability within 24 hours.

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Get in touch with us

Longwin Metal, founded in 2002 as Xiamen Zhenyuan Die Casting Factory, is now an integrated ODM/OEM manufacturer of precision aluminum and zinc die cast components based in Zhangzhou, Fujian.

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Contact: Paul Hu

Phone: +86 13950196086

Email: phu@longwin-metal.com

WhatsApp: +86 13950196086

Address: No. 18-1, Fu Zhao Road, Chen Xiang Town, Chang Tai District, Zhang Zhou City, Fujian Province, China