DYNAFIL ME with COVAFIL and PACKAGE
CHANGER
The newest evolutionary
stage in the TEXTECHNO
DYNAFIL series is the
DYNAFIL ME. Apart from a
substantial increase in output, the
DYNAFIL ME is also characterised by a high degree of
automation and is especially user friendly. Moreover, it opens
completely new areas of application for filament yarn testing.
In the past all DYNAFIL
models worked with constant overfeed/extension. In addition to
this, DYNAFIL ME also
enables measurement of extension or contraction at constant
tensile force, e.g. percentage crimp contraction of textured
yarns. Furthermore, it is possible to carry out time-dependent
shrinkage- and shrinkage force measurements and relaxation- or
creep tests on static yarn.
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The
DYNAFIL ME incorporates a patented high
temperature heater that operates between room temperature
and 500°C. In conjunction with godet yarn feed mechanisms and
electronically regulated servo drives, it enables test speeds of
up to 1000 m / min, which have until now been impossible
to realise. Furthermore, it opens new application possibilities
in the area of high temperature resistant polymers. A further
technical innovation is the high-resolution load cell for
highly accurate measurement of even the smallest forces, e.g.
for crimp tests on textured yarns.
Apart from standard tests for routine quality control, the PC
control technique also permits the use of complex test parameter
linkages, which allow for substantially more comprehensive
statements to be made concerning yarn quality and sources of
faults during production. Detailed investigations have
demonstrated that DYNAFIL
tests that have been configured accordingly can often replace
work intensive knit-dye tests that are commonly used in
texturing. A change of test material, yarn count, or testing
method is PC controlled and requires no manual adjustment to the
test equipment.
In addition to the actual DYNAFIL
testing methods, the application areas of the equipment can be
substantially broadened to include friction measurements,
entanglement tests, yarn evenness tests and yarn count
measurements using additional modules. Here, the basic
principle of all such additional tests is that, in each case,
they take place either simultaneously or sequentially on the
same yarn. As a result, there is a substantial time advantage
over the use of several different test instruments and
significant advantage in space saving, together with increased
functional safety. At the end of the testing sequence, the yarn
samples can be captured by an automatic sample collector
and be forwarded for further testing, e.g. for determining spin
finish- or coning oil contents.
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To achieve a high test
output, an automatic changer for feeding the test packages is
recommended. The Textechno package changers model SM and
SE for feeding 2 or 20 yarn ends respectively operate on
the principle of splicing the running yarn. This method enables
package change without stoppage of the test equipment during the
package changeover.
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Testing
methods
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- Draw-force testing of pre-oriented yarns (POY), e.g.
according to ASTM D 5344 - 99, or of fully-drawn yarns (FOY,
FDY);
- Crimp testing of textured yarns (DTY, BCF);
- Shrinkage testing of all types of yarns;
- Static shrinkage-, relaxation- or creep measurements;
- Friction measurements*;
- Entanglement tests*;
- Capacitive evenness tests*;
- Yarn count testing* with sample collection*.
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*with additional modules
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System components
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DYNAFIL ME, basic equipment |
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Yarn feeds: |
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- 2 godets, alternatively nip rolls can be automatically
added,
- computer controlled servo drives for yarn speeds up to
1000 m/min;
- Pre-selectable extension -80 - 1000 %;
- Gauge length between the godets 1250 mm.
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Heater: |
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Electrically heated,
max. temperature 500 °C (special model for 600 °C if required),
length 1000 mm, automatic traversing for yarn introduction to
the heater.
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Force measuring system:
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1 load cell with measuring roller, nominal range 1200 cN,
resolution 10 µN;
Automatic yarn lift and calibration.
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| Pre-tensioning
device: |
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KTF active feeding
device, PC controlled, for obtaining accurately adjustable and
constant pre-tension forces within the range 1 - 1000 cN;
two easily exchangeable load cells (100 cN and 1000 cN)
available.
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TESTCONTROL: |
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PC system for
controlling the test processes and for the evaluation of the
measured data, connected via Textechno interface;
Textechno software as a WINDOWS application;
Input of all parameters for testing and measured data evaluation
on the PC, saving of selected parameter sets of test conditions
under code words;
PC easily integrated into any network type.
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Additional modules |
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Friction device:
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With ceramic- or
stainless steel friction bodies (other surfaces on request);
Choice between three different, automatically adjustable wrap
angles.
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Entanglement
sensor: |
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Optical
determination of yarn diameter;
Fully automatic adjustment to the yarn count;
Adjustment to existing value levels via adjustable threshold
value;
Max. test speed 1000 m/min;
Measuring heads for fine and medium count yarns (up to 2500 dtex)
and coarse yarns (over 2500 dtex).
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Module for measuring yarn evenness COVAFIL: |
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Capacitive
measuring system, yarn count range 40 - 300 dtex (other ranges
on request);
False twist rotor up to 16000 rpm;
Integrated yarn feed system for stand-alone use,
independent of the DYNAFIL ME.
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COMCOUNT: |
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Yarn collecting
and weighing device, weighing range 0 - 310 g,
resolution 1 mg.
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Automatic sample collector: |
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Takes over the
weighed samples from the COMCOUNT
module;
Exchangeable magazine with 20 collecting positions.
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Package changer: |
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Automatic change
by splicing the running yarn;
Model SE for 20 yarn ends;
Model SM for 2 yarn ends.
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Further
technical data
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Mains supply: |
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220 V, 50
(60) Hz, current requirement approx. 10 A (DYNAFIL
ME).
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Compressed air supply: |
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5
bar, 150 l/min.
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Dimensions, weight: |
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DYNAFIL ME
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Height 1680, width 1040, depth 720 mm, Weight approx. 250 kg |
COMCOUNT,
COVAFIL
and automatic sample collector |
Height 1680, width 680, depth 650 mm, Weight approx. 180 kg |
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Package changer SE |
Height 935, width 800, depth 630 mm,
Weight approx. 65 kg |
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Package changer SM |
Height 1100, width 600, depth 600 mm,
Weight approx. 15 kg |
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Measured Solutions, Inc.
