Coexpair, composites Expertise for Aircraft

Coexpair is the reference in Europe for Net Shape Composites Manufacturing Solutions.

Our main products are Molds, Workcells (Presses) and Injection systems for RTM and SQRTM processes. Our service is to provide advanced engineering for aerospace parts. In collaboration with our customers we deliver innovative part architectures, advanced RTM & SQRTM processes and optimal production equipment.

Our EN9100 qualified shop is dedicated to material coupons, test elements, proof of concept or pre-serial parts. On a general way, Coexpair is supporting its customers from the idea that sprouts in their design office up to the installation of their workshop.

Today Coexpair is a recognized partner of the largest aerospace OEM and Tier-1. Many European companies have become regular customers, including Airbus and Safran.

See our molds, workcells and injection systems in action at Spirit aerosystems for A320 RTM spoiler.

Coexpair works in partnership with Radius Engineering, USA.


Coexpair designs and builds RTM workstations including clamping & heating systems, injection systems and tool handling devices. Automation of High Performance RTM process for aerospace is our job. The partnership with Radius Engineering ensures our Customers the same high quality & reliable equipment worldwide. Previously called RTM press, our workstation is a lot more advanced solution that integrates many functions in a smarter way.

Injection Systems

  • Designed to inject single component or pre-mixed multi-component resin systems
  • Piston actuated by an electric stepper motor
  • Heater capable of achieving temperatures up to 290°C (550°F)
  • Equipped with a complete data acquisition system
  • Able to operate either in a stand-alone mode or integrated with FlowareTM software controlled by PC
  • Parameters can easily be defined by the user prior to each injection
  • The only production proven & capable SQRTM injection
  • system on the market

Workcells (RTM Presses)

  • Optimal Clamping & Heating Systems
  • Specifically designed for RTM and SQRTM processes
  • Uniform clamping force through pneumatic hoses
  • Rapid heating by electric platens providing a clean and safe operational environment (no risk of oil contamination)
  • Control system creates a workstation to monitor and to control the heating zones, as well as the clamping pressure
  • Data acquisition and interface to a computer network are included
  • Included handling equipment for transferring molds into or out of a clamping system
  • Can optionally be fitted with equipment for opening and closing molds
  • Low maintenance required


RTM mold quality is critical for part production success. Customers can count on a team of specialized engineers to design and to machine their molds. FEA allows study of thermal transfer, mold deformation and tool closure kinematics.

Molds are generally aluminum or steel and are designed to be used in combination with a self-clamping system. Equipped with more than 50 CNC-machines, our qualified shops have the capacity to produce molds of complex geometry up to more than 10 meters long. Our network offers the right balance of quality, lead time and budget.

Final fitting is done internally before surface treatment is completed to ensure tool durability.

Mold & tools


Net-shape composites are an opportunity to improve performance: lower weight, lower cost, shorter manufacturing cycle. We support you by engineering for optimal performance. The position of the office inside the workshop gives the designer a great opportunity to combine 3D models and hands-on trials.

Design and Analysis

Our skilled engineers are mastering Samcef & Nastran FEA. They are distinguished by their hands-on experience of manufacturing RTM parts themselves. Their engineering approach is built on understanding the key process elements that impact mechanical performances. Allowables generation including test campaign definition is also part of their job.

Analysis screen

Materials & Processes

The selection of material and the set-up of process parameters are the heart of our engineering services. Manufacturing of flat panels for coupons is a common task. More complex tools are also used to validate the mechanical performances at higher level (sub-element level).

Our shop is the right place for our customers to manufacture their first full scale parts using RTM state-of-the-art industrial equipment (mold and workstation).

Processes Analysis


Coexpair offers an intensive introduction course of RTM for Aerospace. Course covers the process, the design, the materials and the equipment commonly used.