01 / CUSTOMER PROBLEM
Release enclosed geometry
Temporary cores can remove split-tool design constraints from ducts, manifolds and difficult-release composite structures while preserving the intended internal shape.
Product family
Water-Soluble Core Materials
Water-soluble cores and mandrels are temporary internal tools for enclosed cavities, internal channels and difficult-release composite structures.
Engineering view / Water-soluble mandrels
Design the hollow part around its release route
A dissolvable mandrel makes complex hollow geometry possible without forcing a mechanical tool apart. The core must remain stable during lay-up and cure, then dissolve and flush completely through the access provided by the finished part.
02 / SELECTION LOGIC
Design the washout before lay-up
Confirm access openings, drain paths, wall support, surface compatibility, cure exposure and the intended wash conditions. The mandrel is part of the part design, not an afterthought.
03 / PROCESS CHECKPOINTS
Protect shape and access
Plan handling, reinforcement placement, vacuum or pressure, cure, opening of the access path, flushing and inspection. Validate that no residue remains in corners, ribs or small passages.
04 / RELEASE CHECK
Use the actual process materials
Test with the project’s resin, reinforcement, cure route and wash conditions. EPTEK does not publish a universal dissolution time because geometry and process determine the result.
Validate washout with the actual geometry.Share geometry, temperature or hardness target, process route, quantity and finish requirement. The matching EPTEK TDS remains the authority for grade-specific values and handling limits.Contact us ↗
01 / PRODUCT FAMILY
Water-Soluble Core Materials
Water-soluble cores, also called water-soluble mandrels or wash-out mandrels, are temporary internal tools that dissolve after composite curing.
02 / PRODUCT FAMILY
Core Materials and Dissolution Processes
Choose the mandrel form and dissolution behaviour around cavity geometry, wall support, access openings and the required washout cycle.