SAMPE Journal - November/December 2016 - 13
Feature Article
Figure 12. Spring angle results for DForm®
Epoxy at various post cure temperatures
for C channels cured at 50°C and 60°C.
Table 3. Springback angle results for various BMI layups.
When incorporating a bushing on a curved model
surface, the bushing block can be first cured on the
curved area of the model (prior to the tool layup) to create
a perfectly shaped bushing block, after demolding, the
edges are chamfered and the block utilized in the same
way as Figure 14.
Joints
DForm® tiles are laid up with a maximum stagger on the
joints between adjacent plies to optimize the properties
of the tool face. Figure 16 planar view illustrates how
layers of tiles might be assembled and offset between
adjacent layers. Furthermore, tile edges are chamfered
to an acute angle using an oscillating tool as an effective
method to cut the tile beveled edges. Gaps should be
avoided in tile joints as they will readily fill with resin or
remain voidy, the beveled edge helps avoid gaps and
provides a generally smoother lay down of the next layer
of tiles.
Mechanical Properties
Mechanical properties compared with continuous
fiber prepregs (Table 4) show some reduction as
might be expected from the use of a discontinuous
fiber, primarily tensile strength. The relevance of this
knockdown with respect to the tool face is somewhat
tool design specific, most tools being supported with a
backing structure (egg crate fashion) that encompasses
the high load points (tool handling provisions such as
fork lift points etc.). Continuous fiber tooling requires
Figure 13. Screening of
compliancy.
SAMPE Journal, Volume 52, No. 6, November/December 2016
13
Table of Contents for the Digital Edition of SAMPE Journal - November/December 2016
Contents
SAMPE Journal - November/December 2016 - Cover1
SAMPE Journal - November/December 2016 - Cover2
SAMPE Journal - November/December 2016 - Contents
SAMPE Journal - November/December 2016 - 2
SAMPE Journal - November/December 2016 - 3
SAMPE Journal - November/December 2016 - 4
SAMPE Journal - November/December 2016 - 5
SAMPE Journal - November/December 2016 - 6
SAMPE Journal - November/December 2016 - 7
SAMPE Journal - November/December 2016 - 8
SAMPE Journal - November/December 2016 - 9
SAMPE Journal - November/December 2016 - 10
SAMPE Journal - November/December 2016 - 11
SAMPE Journal - November/December 2016 - 12
SAMPE Journal - November/December 2016 - 13
SAMPE Journal - November/December 2016 - 14
SAMPE Journal - November/December 2016 - 15
SAMPE Journal - November/December 2016 - 16
SAMPE Journal - November/December 2016 - 17
SAMPE Journal - November/December 2016 - 18
SAMPE Journal - November/December 2016 - 19
SAMPE Journal - November/December 2016 - 20
SAMPE Journal - November/December 2016 - 21
SAMPE Journal - November/December 2016 - 22
SAMPE Journal - November/December 2016 - 23
SAMPE Journal - November/December 2016 - 24
SAMPE Journal - November/December 2016 - 25
SAMPE Journal - November/December 2016 - 26
SAMPE Journal - November/December 2016 - 27
SAMPE Journal - November/December 2016 - 28
SAMPE Journal - November/December 2016 - 29
SAMPE Journal - November/December 2016 - 30
SAMPE Journal - November/December 2016 - 31
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SAMPE Journal - November/December 2016 - 33
SAMPE Journal - November/December 2016 - 34
SAMPE Journal - November/December 2016 - 35
SAMPE Journal - November/December 2016 - 36
SAMPE Journal - November/December 2016 - 37
SAMPE Journal - November/December 2016 - 38
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SAMPE Journal - November/December 2016 - 40
SAMPE Journal - November/December 2016 - 41
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SAMPE Journal - November/December 2016 - 72
SAMPE Journal - November/December 2016 - Cover3
SAMPE Journal - November/December 2016 - Cover4
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