FAQ

Products

TUBE

Do the tubes have to be cleaned often?

No because they are self-cleaned by the feeding of the material

Do the tubes pollute the fiber and are they worn quickly?

Endurance tests have been performed on tubes in order to check tube damage. Microscope analysis of the inner surface of used tubes and tube sections show no differences compared with a new tube. Customer’s feedback from an analysis of coupons did not show a loss of mechanical.

What is the tube material?

Thermoplastic without Teflon, Fluor or silicon.

How long does it take to change a tube?

5 minutes

How to feed the first fiber?

A metallic shim is supplied to feed from one end of the tube to the other. 
During a machine stoppage or spool change, the fibers can remain in the tube. Then, only a manual splice is needed to re-feed the new fiber for the start up.

What are the advantages of tubes vs pulleys?

No need to rewind the fiber when the AFP head moves.
No risk of twists because of tube’s rectangular section.
No risk of contact between fibers or with external components.
Possibility to cool down the tubes to reduce fiber tackiness on arrival at the AFP head.
Allows complex robot movement without fiber twists.

ROBOT ACCURACY

Is the robot compacting force as high as with a machine tool?

Yes, up to 10 N/mm band width.

Is the robot stiff enough to handle the AFP process?

Yes, the weight of the AFP head, the process compaction force and all associated components are well below the maximum payload of the robot.

Does the robot stiffness decrease and deviate with the time under the compacting payload?

No, because the payload is below the robot maximum capacity, no deviation appears.

What is robot accuracy?

The robot can deviate by up to 2 mm under payload but the software program compensates for this.

What is the impact of robot accuracy?

The ply contour is directly affected but can be corrected by the software

What is the robot repeatability?

The robot repeatability is below 0.15 mm (static or dynamic). This value has to be added to optional linear axis and positioner repeatability (0.15 mm approx. for each)

What are the impacts of robot repeatability?

The robot repeatability impacts the gap between two courses when the layup directions are the same.
The robot repeatability also guarantees that once the program is calibrated, the part is laid up within the repeatability tolerances.

GAP AND OVERLAP

What is the gap between two fibers of the same course?

Gap and overlap tolerance between two fibers of the same course is +/-0.5 mm. If no overlap is required, the material width should be decreased and special guiding plates can be supplied to fit to the narrower material.

What is the gap between two courses?

If the layup directions are opposite, cumulated gearbox backlash will increase by maximum 2,5 mm.

Can Coriolis commit to accuracy, productivity and availability?

Yes, but dedicated to a part and after layup validation trials have been approved by the Customer. A report should describe the acceptance of the trial including layup design, material quality, machine parameters, speed, gap and deviation measurements. Responsibility is limited to the layup and does not include composites processes (compacting, curing, handling, forming,…).

 

ATL vs AFP

  • Because each fiber is fed independently and because each fiber speed is independent of the others, AFP is able to produce more complex structures.
    AFP allows cutting and restarting fibers on the fly, minimizes scrap, places fibers on a steered path or on complex ramps and inserts like honeycomb.
  • Productivity is equal, or even less for ATL, because cutting on the fly is not possible or is limited.
  • An ATL spool is embedded in the layup head, making the head cumbersome and heavy, consequently ATL heads require larger machines.Furthermore, the storage of material in the layup head is very limited compared to an AFP creel capacity of 16 or more heavy spools.

GANTRY vs ROBOT

  • The cost of a gantry is more expensive than a robot on a rail
  • the risk of foreign objects falling onto the part under a gantry is more significant compared to a robot or column configuration with a vertical mould position.
  • Same for visual inspection which is easier with a vertical position than an horizontal tool position under a gantry
  • A robot on a rail can work on both sides, the gantry cannot.
  • Robot range is limited to a 3 m part width, wider parts can be made with the use of a rotating positioner
  • Optional positioner under a gantry might not be feasible

CUSTOMER SERVICE

How Coriolis Composites supports worldwide customers?

Coriolis Composites has worldwide customers that are supported by locally based Coriolis Composites subsidiaries or partners.The company continues to set up such remote teams close to customers with serial production machines, as is already the case in Biarritz, Augsburg & Montreal. Furthermore, with the machine based on “off-the shelf” robotic components, Coriolis Composites customers benefit from the robotic supplier’s worldwide service and on-site support, in conjunction with the service team.

How is the maintenance managed?

Coriolis Composites provides full maintenance training and /or yearly maintenance contracts, appropriate for the customers' manufacturing plant. If permitted by the Customer, a remote control service is carried out to support the customer in very short time.
Because Coriolis Composites supplies only standard products, main standard spare parts are available worldwide within 48h.
Local spare storage can be delivered to reduce spare part delivery time.
Because all the machines use standard off-the-shelf-components, maintenance prerequisites and know-how are basic and current.