JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 44

AUTOMATlON preforming technology

Gripper placing a patch, preform gripper over preform, preform gripper lifting preform

with Fibre Patch Placement. Typical preform
thickness is between 0.25 and 2.0 mm. Such
preforms can be easily handled and further
processed by picking up the final preform at
only a few points.
Removing the preform from the tool
When automating the FPP preforming chain,
the challenge is that the patches of the first ply
have to stick to the preforming tool surface so
well that all the other layers can be built upon
them. However, the preform should be easily removable at the end of the preforming
process. The adhesion of the first ply needs to
carry the total preform weight at the robots'
full acceleration speed, even when the tool
turns upside down and the complete preform
is literally "hanging" on the first (interface)
layer. On the other hand, the removal needs
to be quick, without damaging the first layer
of the preform, e.g. by fibre pull-out perpendicular to the surface. Automated preform removal enables a quick restart of the machine
and is essential to reduce overall downtime
and increase machine output as well as overall
productivity.
The solution to overcome these challenges is
to modify the preforming tool surface. The
separation of preforming and impregnation
tools allows for a design of each tool that is
more specific for its respective task. For the
demonstrator, the modification was achieved
with an elastic textile whose thermoplastic
material was selected according to the binder
in the carbon fibre tape. Furthermore, air
ducts were incorporated in the tool to produce an impulse of compressed air to peel off
the preform. This air impulse causes the fabric

44

to move while slightly shearing and lifting it
off the preform at the same time. This way,
both requirements for fast and robust automation are fulfilled in parallel.
Using standard gripper technology
Compact FPP preforming based on unidirectional carbon fibre spread tow tapes results
in a high fibre volume content of up to 65%
without separate compaction in the injection tool. This compact preform also makes it
possible to use standard gripper components
such as vacuum suction cups. Effectively gluing the patches onto one another allows direct
contact of the suction cups with the sensitive preform surface without damaging it.
Moreover, there are no residual marks of the
gripper after releasing the preform. The usage of standard gripper technology keeps the
process interface automating costs low, offers
high flexibility in building a tailored gripper

Final helmet shell

jec composites magazine / No109 November - December 2016

system and works efficiently with only little
pressurized air consumption.
Conclusion
Cevotec will present a new production system for the industrial manufacturing of complex composite parts at the JEC 2017 show
in Paris. To further automate the preforming
process chain, Cevotec has shown how preform removal, gripping and manipulation can
be automated for FPP preforms. Overcoming
the challenge of patch adhesion and preform
removal, the automation gap between the
preforming cell and connected systems for
e.g. trimming or impregnation can be closed.
Automating the process interface eliminates
manual preform handling, reducing machine
downtime and thereby increasing overall productivity in the preforming process.
More information: www.cevotec.com
Contact: felix.michl@cevotec.com


http://www.cevotec.com

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016

Cover
Edito
Opinion: Public transportation
Contents
NEWS
In brief
Development
Graphene
Agenda
Cyclitech, the international conference on bicycle technology
BUSINESS
Prospective
Latin America
Biocomposites
MANUFACTURING
Overmoulding
RTM
Viscous resin
Feature Automation - The key to success?
Conferences
Awards
Floorplan
Preforming technology
Robotization
Carbon fibre
Cutting
SOLUTIONS
UAV
Sailing
Fire rescue
Public transportation
Autonomous vehicle
In the world
TECHNOLOGY
NDT
Certification
Index
Advertisers
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - BckCovAd
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Cover
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 2
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Edito
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Opinion: Public transportation
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 5
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Contents
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 7
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - In brief
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 9
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Development
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 11
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Graphene
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 13
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Agenda
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Cyclitech, the international conference on bicycle technology
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Prospective
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 17
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 18
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Latin America
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Biocomposites
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 21
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Overmoulding
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 23
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 24
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 25
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - RTM
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 27
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 28
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Viscous resin
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 30
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 31
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Feature Automation - The key to success?
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Conferences
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 34
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Awards
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 36
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 37
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 38
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 39
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 40
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Floorplan
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 42
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Preforming technology
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 44
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Robotization
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Carbon fibre
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 47
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Cutting
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 49
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 50
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - UAV
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 52
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Sailing
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Fire rescue
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Public transportation
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Autonomous vehicle
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - In the world
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 58
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - NDT
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 60
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 61
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Certification
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 63
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 64
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 65
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - Advertisers
JEC COMPOSITES MAGAZINE - Issue #109 - November/December 2016 - 67
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