Robotic Die Casting: The Ultimate Guide

The robotics industry is currently undergoing rapid development, with capabilities growing increasingly sophisticated. Examples include robots replacing humans in hazardous tasks and medical robotic arms performing delicate surgeries. Against this backdrop, demand for robotic components—particularly those for humanoid robots—is rising. If you’re considering die casting for robotic parts, the following article will prove invaluable.

What is Robotic Die Casting?

Robotic die casting refers to the process of producing robotic components through die casting.

As an efficient, one-step metal forming process, die casting is increasingly favored by the robotics industry. At Sunrise, we provide turnkey robotic component solutions encompassing design, mold design and manufacturing, rapid prototyping, die casting, trimming, CNC machining, and surface finishing.

What are the benefits of using die casting for robot parts?

High Precision

Die-cast parts achieve exceptional dimensional accuracy, meeting stringent assembly requirements. For precision-critical robot components like joint housings, sensor enclosures, or linkages, die casting is the ideal solution.

Lightweight

Typically utilizing lightweight aluminum alloys, die casting delivers significant weight reduction compared to stainless steel. If your robot requires agile operation, is weight-sensitive, yet demands high-strength components, die-cast parts will better meet your needs than plastic or stainless steel alternatives.

Complex Geometries

Certain robotic components feature intricate shapes that would be prohibitively expensive to machine. Die casting excels at producing complex forms—provided manufacturability is confirmed during design—enabling seamless one-piece molding of intricate structures.

Cost-Effectiveness

Although die casting involves higher tooling costs upfront, it offers significant per-unit cost advantages for high-volume production runs. This is due to its rapid production speed—nearly one part every few seconds—and exceptional consistency.

Which die casting processes are suitable for manufacturing robot parts?

High-pressure die casting

High-pressure die casting is suitable for producing thin-walled robot parts with excellent surface finish.

Vacuum die casting

Vacuum die casting allows molten metal to fill cavities more densely, resulting in lower porosity, making it suitable for manufacturing robot housings.

Semi-solid die casting

Robot parts manufactured via semi-solid die casting exhibit high dimensional consistency due to the smooth filling process.

What are the differences between die-cast and injection-molded robot components?

Die casting and injection molding are distinct manufacturing processes, with the primary difference being the raw materials used.

Die casting is a metal forming process under high pressure. Its raw materials are primarily low-melting-point metals such as aluminum alloys, magnesium alloys, and zinc alloys. These alloys are injected into mold cavities under high pressure. After filling, they cool and solidify before being ejected, yielding complex metal components.

The injection molding process is similar to die casting, also involving the injection of liquid material into a mold to form parts. However, injection molding typically uses plastics—high-molecular-weight polymers.

Robotic components manufactured via die casting exhibit higher mechanical strength than those produced by injection molding.

Which robot components can be produced via die casting?

• Motor housings
• Joint housings
• Linkage arms
• Heat sinks
• Transmission housings
• Sensor enclosures

What is the most suitable die-casting alloy for robot components?

Aluminum alloys are optimal for manufacturing robot parts. Numerous aluminum alloys are available for die casting, offering excellent flow properties and mechanical strength. They provide superior mold filling and yield durable final components. Aluminum alloys commonly used for robot components include A380 and AADC12, offering the best overall cost-performance ratio.

Alternatively, zinc alloys present a viable option. With a lower melting point than aluminum alloys, zinc alloys cause less mold wear and are better suited for casting small, intricate robot parts.

Why choose Sunrise for your robot component die casting?

Sunrise possesses over 15 years of die casting expertise, having successfully delivered over 1,000 globally acclaimed die casting projects.

Our renowned die casting machines range from 180T to 1600T, enabling production of both large structural components and intricate parts. We rigorously control porosity below 1% during casting to ensure corrosion resistance and structural integrity.

Sunrise also operates in-house CNC machining and surface treatment facilities to further meet your robotics assembly and corrosion resistance requirements.

During quality inspection, we utilize CMM, X-ray testing, CT Scanners, and other measurement equipment to verify dimensional accuracy and detect defects, guaranteeing flawless delivery.

Contact Sunrise to start your robotics die-casting project today!