The document provides details on the filament winding process used to fabricate a bolted hub fitting tube. It describes: 1) Loading spools of dry fiber onto a winding machine and passing it through a resin bath to saturate it before winding onto a rotating mandrel in various patterns as programmed; 2) Applying additional layers of saturated mats and allowing the resin to cure on the mandrel for 24 hours; 3) Removing the cured tube from the mandrel and cutting it to length before drilling holes in one end and inserting bolts to complete the hub fitting; and 4) Applying a polyurethane liner to the inside of the tube and inspecting the final part.

1. Rédaction anglaise de la gamme (604-A53-JR)
5/08/2016
F I L A M E N T W I N D I N G
T U B E W I T H B O LT E D H U B F I T T I N G
Presented by Francine Côté

2. 2
03 CURING PROCESS
04 RELEASE PROCESS
05 END FITTING CONNECTION
06 FINISH
P R E S E N T A T I O N P L A N
Filament winding fabrication technique
01 WINDING MACHINE & PROGRAM
02 TUBE PRODUCTION

3. Threaded Towpreg
1 . W I N D I N G M A C H I N E & P R O G R A M
3
Place spools of dry fiber (tows) on the creel’s supports. Thread around
tension bars.
Creel Cabinet
The signals returned from these bars are interpreted by a closed-loop,
servo driven system that maintains constant fiber tension as spools unwind.
Tension Load Center
Insert ends of fiber in the filament feed’s opening.
Pass the strand through the resin bath and over a drum or wheel.
Delivery Head Carriage
The towpred passed through the guide on the deliveryhead. Machine is
ready to begin winding as per CNC program.

4. 4
Winding Expert by Microsam.
The controlled variables for winding are fiber
type, resin content, wind angle, tow or
bandwidth and thickness of the fiber bundle.
Winding Program
Top to bottom: Hoop, Helical, Polar Winding.
Hoop plies provide circumferential strength,
while polar or helical will provide greater
longitudinal / axial tensile strength.
Winding Patterns
Chopped strand mats transfer the axial load
from the bolts to the wound material in the
center part.
Ply Sequence
1 . W I N D I N G M A C H I N E & P R O G R A M

5. 5
Mix Epicote Resin MGS RIMR 135 and Epikure Curing Agent
RIMH 137 in a mixing ratio of 100:30.
• low viscosity for complete wetting of roving
• pot life required of 2 hours minimum.
Resin Bath
When the drum rotates, a film of resin builds up. This film can be
metered to the desired amount by raising or lowering the drum.
• Adjustable “Doctor Blades” controls resin pick-up
Amount of Resin
2 . T U B E P R O D U C T I O N

6. 6
Saturate pre-cut mats with epoxy resin using a brush. Wear nitrile
gloves and use in well ventilated area.
The 5th ply begins: helical
2 . T U B E P R O D U C T I O N
Final hoop ply.
Wrap mat plies around the mandrel. Squeeze out as much excess
epoxy as possible from the mats with a plastic scraper.

7. 3 . C U R E
7
Once the mandrel is completely covered to the desired
thickness, it rotates in the winding machine for 24 hours at 23°C
as recommended in the Technical Data Sheet.
Cure
Post cure in an oven at 60°C for 15 hours as recommended in
the Technical Data Sheet.
Post Cure

8. 4 . R E L E A S E P R O C E S S
8
Once the resin has cured, the mandrel is removed with a
mandrel extractor, leaving the hollow final product.
Cut at the previously made marks on a band saw to get a
2000mm long tube.
Final DimensionsMandrel Extractor

9. 5 . E N D F I T T I N G C O N N E C T I O N
9
Install a glass and tile drill bit (Ø J = 7.036mm)
in a drill press.
Use a water based cooling liquid and a RPM
of 10mm/min.
TILE & GLASS DRILL BIT
• Drill 10 holes that are 36° apart.
• Hole size tolerance is 6.934 - 7.188mm.
• Inspect holes for delamination.
ASSEMBLY DRAWING
Insert and assemble remaining 9 other M8
bolts, bushings and 18 washers.
BOLTED HUB FITTING

10. 6 . F I N I S H
10
Liner Application
Pour the uncured polyurethane thought the
inlet hole in the center of the hub and
rotated in a lathe.
Final Cure
Keep the pipe spinning at 1400 RPM for
30 minutes to assure an even distribution
of the liner while it is curing.
Inspection
• Clean the outside of the tube with
acetone.
• Inspect final part, dimensions,
tolerances and imperfections.
• Have final tube and hub fitting
inspected and approved by a Quality
Insurance inspector.

11. T H A N K Y O U !
A n y Q u e s t i o n s ?