SAMPE Journal - March/April 2017 - 35

Feature Article
process), which was investigated
and implemented by Applicator
System AB, Moelnlyke, Sweden, in
cooperation with Owens Corning,
Battice, Belgium5,6,7. This process
enabled a fully automated production
of dry preforms. To use this process
for aerospace applications the
"Programmable Powdered Preform
Process for Aerospace" (P4Aprocess), was developed, which uses
carbon fiber rovings instead of glass
fiber rovings8. One disadvantage
of the P4-processes, is the usage of
thermoplastic powder binders, which
lead to a clogging of the vacuum
suction during the preforming. To
avoid the disadvantage of the powder
binder, the Ford Motor Company,
Dearborn, USA, developed the "Ford
Programmable Preform Process"
(F3P-process)9. In contrast to the
P4-processes the F3P-process uses
a special roving (Preformance, PPG
Industries, Pittsburgh), in which the
binder is integrated as a filament.
All mentioned fiber spraying
technologies
have
a
major
disadvantage which leads to an
insufficient use of the lightweight
potential of the material. The
technologies do not allow for aligning
the fibers during the layup. The big
advantage of FRP is the possibility to
orientate the fibers along load paths.
This fiber orientation is one reason
for the high lightweight potential
of FRP, compared to classical
construction materials which have
isotropic mechanical properties.
A new industrial approach is the
process Tenax® PvP-process (Tenax®
Part via Preform). In this process
a quasi-isotropic basic preform is
sprayed in a fiber spraying process.
To increase the parts mechanical
properties, continuous fibers are
applied onto the basic preform in a
dry fiber placement process. This
leads to better mechanical properties
compared to the basic preform10.
Another approach to implement
a fully automated and economic
preforming process for FRP structural
parts by fiber spraying with a direct
integration of functional elements
(cut-outs, inserts, stiffening profiles),
SAMPE Journal, Volume 53, No. 2, March/April 2017

Material Testing Technology
Wheeling, IL USA






www.mttusa.net
Ph (847) 215-7448





ASTM D6641
ASTM D7249

ASTM D7264

ASTM D695

ASTM D3410

ASTM C393








ASTM D5379
ASTM D3039

ASTM D2344

ASTM D4255

ASTM C297
ASTM D7332

COMPOSITE TEST FIXTURES

Figure 1. Reduction of process steps by the 3D fiber spraying process developed at IKV.
35


http://www.mttusa.net

Table of Contents for the Digital Edition of SAMPE Journal - March/April 2017

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