SAMPE Journal - November/December 2020 - 29
Figure 2. Consolidation unit using a heating-and-cooling approach.
minute, a consolidated blank is expected. This is
supposed to work for a stack thickness between 0.6
and 4.0 mm. Heating and cooling of an entire thick
metal mould would take a lot to long. Therefore,
the thermally dynamic mass, i.e. the thickness of
the metal dies, needs to be reduced to the minimum.
For the heating and the
cooling, separate compression
frames are in use. Furthermore,
the machinery has a loading/
unloading station and fully automatized drives for the shuttling, lifting, opening, and closing of the metal dies. At least
three sets of dies are in operation in the consolidation unit at
once, where usually in the lower
halves, the thickness variations
are depicted.
The removal of the consolidated blanks from the metal die
is done at elevated temperature.
The residual heat within the metal dies is then used partially for
the pre-heating of the next stacks
before it enters the heating position.
The combination of thin
metal dies, individual stations
for the heating and the cooling,
automated shuttling of the dies,
and high precision process control yield the required high productivity and superior quality of
the consolidated blanks.
w w w. s a m p e . o r g
PERFORMANCE CHARACTERISTICS
Tape Stacking Cell
For the investigations, a test stack was utilized that
consists of 0°-layers, 90°-layers and +/- 45° layers.
The overall outer dimension of the stack was 430
x 200 mm. While the 0°-layers are placed as one
piece on the stack, the 90°-, +45°-, and -45°-layers
consist of two tape cutouts. This means, there is a
characteristic line in these layers where the tape
cutouts need to be positioned exactly adjacent to
each other.
Trials with the test stack at extensive parameter
variations have shown that a stacking precision of
+/- 1.0 mm is achieved and even a stacking precision of +/- 0.5 mm is possible. However, the result
is dependent on both, the calibration of the end-ofarm tool (EOAT) and the illumination conditions.
Precise tool-centre-point settings for the EOAT are
achieved with utilization of calibration software.
Back-lighting of the EOAT improves the image
quality. Appropriate back-lighting with an illumination foil on the EOAT allows detection of the
transition from the tape to the background in a
narrow range.
N OV E M B E R / D E C E M B E R 2 0 2 0
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SAMPE JOURNAL
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29
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SAMPE Journal - November/December 2020
Table of Contents for the Digital Edition of SAMPE Journal - November/December 2020
Table of Contents
SAMPE Journal - November/December 2020 - Cover1
SAMPE Journal - November/December 2020 - Cover2
SAMPE Journal - November/December 2020 - Table of Contents
SAMPE Journal - November/December 2020 - 2
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