Automatic tensile tester for high-tenacity yarns
 STATIMAT 4  Twisted vs. untwisted yarn - Better definition of the test and lower deviations for breaking force, elongation at break and work to rupture: During the testing of an untwisted multi-filament yarn, usually filament breaks occur one after another, whereas a twisted multi-filament yarn will break suddenly.
- Close-to-practice tests: For most technical yarn applications, the yarn is twisted before being processed and subjected to use in its application.
- Standardized test method: Various standards recommend or require tensile tests on technical yarns to be carried out after twist insertion, e.g. ASTM D 885, Note 9, ASTM D 2256, BISFA standards for Polyester- and Polyamide filament yarns.
- Possibility for twist optimisation: Material properties which can be measured with the equipment such as tenacity and elongation, work to rupture, modulus, and reference values for force and elongation can be examined regarding the influence of twist. This enables determination of the optimum twist level for respective applications.
For these reasons, Textechno developed the automatic testing equipment STATIMAT 4, featuring innovative technical details that take into account the special requirements of technical filament yarns. Both the mechanical construction of the equipment and its force measuring range are suitable for maximum forces up to 5000 N. It is equipped with patented bollards located at both clamps (force reduction cams), which automatically swing in. The clamps are characterised by their outstanding clamping effect. A patented automatic rotary clamp, which is integrated into the test section, inserts twist prior to commencement of the tensile test.  |  |  | Automatic bollards and twisting device of STATIMAT 4
|
As applicable to the STATIMAT ME, in the STATIMAT 4 model there is also a possibility to use special clamps instead of the automatic yarn clamps, e.g. for fabrics or slivers and rovings. Moreover, it is possible to carry out automatic yarn count measurements using an AUTOCOUNT module. STATIMAT 4 MONOFIL As a further application the STATIMAT 4 MONOFIL is available for automatic testing coarse monofils as well as other coarse or sticky threads including narrow tapes and artiicial grass which cannot be suction cleared. This STATIMAT 4 version employs a mechanical clearing system for broken end removal. Further modifications include a special package changer and - if necessary - ioniser bar discharging the complete testing zone.
System componentsTest section: 2 pneumatic yarn clamps with force reduction cams, automatic linear threading by auxiliary clamp, min. gauge length 40 mm, max. travel of draw-off clamp 880 mm for a 100 mm gauge length
Package changer: Standard version with 24 positions, expandable to 48 positions
Measuring systems: Force measuring device with easily exchangeable force transducers, max. 5000 N
Elongation measuring device with resolver, resolution 0.4 µm
Twist insertion: Rotating auxiliary clamp situated below the draw-off clamp
Yarn feed mechanism: Nip-roller system, max. yarn delivery speed of 300 m/min, resolution of length measurement 0.3 mm
AUTOCOUNT: Yarn collection and weighing device, measuring range 0 - 310 g, resolution 1 mg
Further technical dataMains supply: 220 V, 50 (60) Hz, current requirement approx. 1 A
Compressed air supply: min. 5 bar, 150 l/min (with AUTOCOUNT: 200 l/min)
Dimensions: Height 1850 mm, Width 910 mm (for 24 position package changer), Depth 700 mm, Weight approx. 290 kg
The above information can be subject to change by Textechno. |
