3D Printed Sacrificial Tooling —Washes Out with Water
ExOne's unique Washout Tooling solution streamlines the production of aircraft ducting, pressure tanks, struts, mandrels and other hollow tools and objects. The process is simple: We 3D print the tool core in silica or ceramic sand, and coat it with a proprietary material that remains water soluble to high temperatures. Then, composite layup is completed as normal. After autoclaving, the entire tool is simply washed away with water, and the sand is reclaimed for reuse.
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?
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.