Ascent Aerospace to unveil latest mould technology at JEC World

HyVarC layup tooling offers a cost-effective, lightweight, short lead-time solution for prototype and development applications.

Sample HyVarC tools will be on display at Ascent’s stand at JEC World 2018 in Paris, booth R86 in hall 5, and at AeroDef Manufacturing in Long Beach, California, March 27-28, booth 624.

HyVarC combines a thin Invar backup structure and facesheet with a bonded, high-temperature composite working surface. The resulting tool is 50% lighter with a 20% shorter lead-time than a traditional Invar layup mould, while maintaining the same superior vacuum integrity and dimensional precision. The hybrid mould capitalises on the desirable performance characteristics of Invar and composites to offer an ideal layup mould for prototype aerospace parts.

At half the thickness of a traditional Invar mould, the thin Invar backup structure takes less time to weld and manufacture. It serves as both the master mould and the deliverable mould, eliminating the time and cost of creating a second composite backup structure. Lead-times are reduced by at least 20%, compared to an all-Invar or all-composite tool.

Thin Invar, and the resulting lighter weight, is easier to handle when transporting the tool within the facility. It has thermal mass benefits, for faster autoclave cycles each time the customer is curing a part. And as Invar is a commodity by weight, raw material savings can be passed along to the customer.

The machined composite working surface offers better dimensional accuracy than net-mold composite tooling, while the Invar structure provides vacuum integrity and durability. A part fabricated on a HyVarC mold is bagged to the Invar facesheet, which provides vacuum reliability that is independent of the composite surface and does not degrade with age or thermal cycling.

The composite working surface is easily re-machined to support modifications for rapid prototyping and R&D applications. A damaged surface can be repaired with material add (layup) and subtract (re-machine) operations. The base mould can be reused by burning off the composite working surface and laying up an entirely new surface.

http://ascentaerospace.com/hyvarc-hybrid-invarcomposite-layup-molds