3D Printed Washout Tooling On Demand

ExOne® global Adoption Centers offer on-demand 3D printing of custom sand and ceramic cores for washout tooling. These streamline the manufacturing of aircraft ducting, pressure tanks, struts, mandrels and other hollow tools and objects.

Soluble Support Material Replaces Multi-Piece Metal Breakdown Tooling

Eliminate the expenses and lead time associated with traditional manufacturing of composite parts with trapped geometries. Washout Tooling from ExOne leverages soluble support material for 3D printing hollow objects. Our 3D printer generates a dissolvable support core of silica or ceramic sand which is then coated with a water-soluble spray or Teflon® tape to prevent resin migration before composite layup through filament winding or woven fabric*. After curing, the soluble support material can be washed out with tap water.

The washout tooling process of 3D printing hollow objects is faster and more affordable than traditional methods of manufacturing multi-piece metal breakdown tooling. And, because the sand cores can be printed in more complex designs, ExOne washout tooling also eliminates the need for the multi-piece molds used to make castable washout tooling media for a faster and more streamlined process.

Contact us to order 3D printed cores for washout tooling, or learn more about our sand systems and incorporating the 3D printing of soluble support material into your manufacturing process.

*ExOne does not provide composite layup services, but will coat the cores in Teflon® tape or water-soluble spray per customer specifications before shipping an order.

Let ExOne 3D Print Your Washout Tooling

Our high-quality service is fast and affordable.

request a quote

FAQs for 3D Printing Hollow Objects with Washout Tooling

What is Washout Tooling commonly used for?

3D printed soluble support materials are designed to create hollow tooling and composite parts with trapped geometries. You can order parts on demand developed with washout tooling for aircraft ducting, pressure tanks, mandrels and more.

Can you help design a digital file?

ExOne accepts a wide range of digital modeling file types, though STL is most preferred, and files can be easily uploaded via our Request a Quote form. If you need assistance creating a file that is suitable for 3D printing, please inquire about our design services.

What is the typical coating applied to seal the core from resin infiltration?

Teflon® tape wrap or soluble spray-on coating. We can apply whatever coat you need to prepare the cores for finishing in your facility.

What composite materials are compatible?

Currently, ExOne only offers printed and coated cores. Composite layup, curing and washout is completed by our customers using filament winding or application of prepreg woven fabric. Common layup materials that can be applied to our cores are: carbon fiber, fiberglass, aramid fiber or ceramic matrix composites (CMC).

What is the maximum cure temperature for composite part manufacturing?

350°F (177°C)

Are ExOne 3D printed cores autoclave approved?

Yes. The core can withstand a maximum autoclave pressure of 85 psi during composite part production.

What do you use to washout the core after the composite part is produced?

Our cores are made with water-soluble support material and are able to be removed with room temperature tap water.

Are there any chemicals or toxins present during washout?


When will I receive my 3D printed tooling?

Standard lead time for washout tooling is 7-10 working days to account for printing, curing and coating the cores. Additional production to apply the composite layup, cure the tooling and washout the core will be required after you receive the parts. Rush services are available.

Can you accommodate the volume of my order?

The binder jetting process is the most economical choice for 3D printing hollow objects. And lots of 1 can be just as efficient as lots of 1,000. Additionally, iterative or individually customized washout tooling can be printed in a single print run.

Let ExOne 3D Print Your Washout Tooling

Our high-quality service is fast and affordable.

request a quote