Shenzhen Alu Rapid Prototype Precision Co., Ltd.

Casting a metal prototype from a 3D printed part is a popular rapid prototyping method, often called "lost-pattern" or investment casting. It uses the 3D printed part as a disposable pattern to create a mold, allowing you to produce functional metal components with complex geometries quickly and cost-effectively. This is ideal for low-volume runs (1–50 parts) in industries like aerospace, automotive, or medical devices. The two main approaches are investment casting (using a printed wax-like or resin pattern) and sand casting (printing the mold directly). 

Step-by-Step Guide: Investment Casting with a 3D Printed Pattern

This process typically takes 1–3 weeks, including printing and curing. It's based on hybrid 3D printing and traditional lost-wax techniques.

1.Design the Part and Pattern

2.3D Print the Pattern

3.Prepare the Investment Mold

4.Burn Out the Pattern

5.Pour the Molten Meta

6.Break Out and Finish the Casting

Alternative: Sand Casting with 3D Printed Molds

For simpler, larger prototypes without fine details, use binder jetting to print the mold directly—no pattern needed. This skips burnout and suits rougher finishes.

1.Design and Print the Mold: From CAD, print a sand mold (using furan or silica sand with binder) via binder jetting. Include cores for internal features.

2.Pour and Cool: Preheat if necessary, pour molten metal, and let solidify.

3.Extract and Finish: Shake out the sand and clean the part.