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Monforts Textil-maschinen has launched a completely new, modular
design Thermex hotflue system for knitted fabric producers to
reduce dyeing process times from hours to minutes. The Thermex
6500 is an all-new loop dryer with a fabric capacity of up to
51m. The machine has a number of new features, including the
control system, drive system and indirect gas heating.
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In control
A key feature of the Thermex 6500 is the ergonomically-designed
control desk. This provides easy access to all the main
control and operating functions via a touchscreen monitor
located at eye level. A simple menu system guides operators
through the set-up procedure. The system is now uniform
across the Monforts range, making it even simpler for
operators to move between different types of machine.
The Thermex 6500 is available with a choice of two control
systems. The standard Qualitex 540 allows important operating
parameters, including temperature setpoints and fan speeds
to be set and monitored using the touchscreen.
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Thermex hotflue system for knitted fabrics
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The optional Qualitex 740 is a full-scale, programmable logic
process controller that incorporates the Monformatic system.
Additional functions offered by Qualitex 740 include the storage
of set-up data, batch management and network interfacing.
Both Qualitex 540 and 740 have a two-loop system for emergency
run and can be connected to Monforts' remote diagnostics system.
Econtrol knit
Developed for use with the new Thermex 6500 hotflue, Econtrol
KNIT delivers previously unheard levels of productivity. A batch
that would require between 12 and 24 hours to produce using
a discontinuous process, takes just two minutes with Econtrol
KNIT. Moreover, Econtrol KNIT can reproduce the results time
after time, even with large batches. Precise control of the
dwell time ensures there is no variation in colour.
Unintentional Moiré (rippling) effect is also avoided
because the process puts no mechanical strain on the fabric
surface.
Unlike other processes, Econtrol KNIT dyes cotton/elastane
blends without the fabric having to be sewn into a tubular form.
Another benefit is that fabric is dry after the dyeing process
so it does not have to be immediately washed out.
Econtrol Knit is suitable for all types of reactive dyestuffs.
Although the process requires no salt or urea, it achieves up
to 5-8% higher yields from dyestuffs than with other processes.
Production costs can be up to 45% lower than for discontinuous
methods of dyeing. Econtrol is a trademark from DyStar Textilfaurben
GmbH & Co. Deutschland KG.
Individual drives of hotflue rollers
Standard roller diameter on the Thermex 6500 is 140mm. An 180mm
diameter version is available as an option. Manufactured with
stainless steel, the rollers in the drying section are Teflon-coated,
while those in the thermosoling section have a highly-polished
surface finish.
An AC motor powers each pair of upper rollers. This allows
for higher speeds compared to the single chain drive used on
previous Thermex models. The motors can be controlled by either
a common or individual frequency converter.
ST stabilisation rollers
For fabrics that are prone to waving or creasing during hotflue
drying, Monforts has developed the ST stabilisation roller.
Featuring a dual density rubber coating, the ST rollers feed
fabric through the hotflue without leaving any marks.
Indirect gas heating
The Thermex 6500 is the first Monforts hotflue available with
the Exxotherm indirect gas heating. This Monforts-developed
system keeps combustion gases separate from the circulation
air to prevent yellowing of elastomer fabrics. It can be used
in modern reactive and naphthol dyeing processes with no neutralisation
of the alkali.
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