eSUN PLA-Cast: Specialty 3D Printing Filament for Investment Casting. Burns cleanly with low ash residue of only 0.3%. Prints accurate prototypes, replacing traditional wax injection molding. Ideal for jewelers and small foundries.

When it comes to traditional metal casting or jewelry making, many people think of wax injection molding, where wax models are made before casting. This process requires expensive metal molds and takes a long time to create a prototype. Today, 3D printing technology significantly reduces both time and cost with special 3D printing filaments like eSUN PLA-Cast, designed specifically for melt casting (investment casting).

What is PLA-Cast?

eSUN PLA-Cast is a 3D printing filament in the PLA category, formulated specifically for "casting" as a replacement for traditional wax patterns. The concept is to first 3D print the prototype using an FDM printer. Then, the printed part is coated with plaster or a slurry until it hardens into a mold. This mold is then placed in a high-temperature furnace (burnout) to completely decompose the PLA-Cast material, leaving almost no ash residue. Only the mold cavity remains, ready for molten metal to be poured in to create the final product.

Key Features that Differentiate PLA-Cast from General PLA

Compared to standard PLA that we are familiar with, PLA-Cast has properties specifically designed for casting applications, including:

• Very Low Ash Content (as low as 0.3%) — Burns almost completely, leaving minimal residue in the mold, resulting in smooth, defect-free cast parts.
• High Strength — Prints strong prototypes that maintain their shape well and do not warp during the slurry coating process. Withstands handling before being placed in the furnace.
• High Precision Printing — Captures fine details effectively, suitable for jewelry requiring sharp patterns.
• Easy Post-processing — Allows for convenient sanding or additional detailing before slurry coating.

Suitable for Which Applications?

PLA-Cast is designed specifically for melt casting and prototyping. The groups that will benefit most include:

• Jewelry makers and gold shops who want to create prototypes of rings, pendants, or custom-designed jewelry without hand-carving wax.
• Small foundries or model makers who need to cast metal prototypes before mass production.
• Designers who need to test multiple versions in a short time, as new prototypes can be printed much faster than hand-carving wax.

Initial Printing Settings

For PLA-Cast with a diameter of 1.75 mm and a weight of 1 kg/roll, the initial printer settings are as follows:

• Nozzle Temperature: 210–240°C
• Heated Bed Temperature (required): 45–60°C
• Fan Speed: 100%
• Printing Speed: Not exceeding 200 mm/s

With a density of 1.25 g/cm³ and a high tensile strength of 76.85 MPa in the XY plane, the printed prototypes are durable enough for the slurry coating process before burnout, without easily warping or breaking.

Conclusion

eSUN PLA-Cast offers a solution that makes metal casting processes, from jewelry to small industrial parts, faster, more cost-effective, and more precise. It eliminates the need for expensive metal molds or traditional hand-carved wax patterns. It is ideal for jewelers, small foundries, and designers who need to test multiple prototypes in a short timeframe.

For those looking for high-quality PLA filament for general printing alongside this, you can find eSUN PLA Basic Filament at Molastic.

Tags

3D Printing eSUN Filament Functional Materials Investment Casting Jewelry Metal Casting PLA PLA-Cast

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