link no. 59 customer magazine spun yarn systems - Rieter

10 LINK 59 . 1 /2012
PRODUCT NEWS
Fig. 2 Two applications
in direct comparison
with competitors illustrate
the high productivity
for equal quality
and energy saving with
the C 70 card.
120
100
80
60
40
20
0
C 70
160
140
120
100
80
60
40
20
0
C 70
140
120
+115 %
65
+20 %
100
Competitor
Energy efficiency in carding has a name – C 70
With its high production performance and the innovative
machine cross-section, the C 70 card attains
the lowest energy consumption values per kilogram
of produced card sliver. In comparison to wider cards
with a conventional technological cross-section, the
C 70 impresses with its lower energy consumption in
the range 15 – 25 %. The following direct field comparison
confirms this statement.
ROTOR YARN 100 % VISCOSE – C 70 COMPARED TO CONVENTIONAL
1.3 M CARD
Production [kg /h]
0.18
0.16
0.14
0.12
0.10
0.08
0.06
0.04
0.02
0.00
-42 %
0.091
160
140
120
100
80
60
40
20
0.157
0
-16 %
128
120
100
43 433
80
60
40
20
0
153
Annual saving: 25 000 CHF
COTTON – WASTE BLEND FOR ROTOR YARNS, C 70 COMPARED TO
CONVENTIONAL 1 M CARD
Production [kg/h]
Energy consumption* [kWh/kg]
Energy costs in 1 000 CHF / year*
Competitor * based on 0.1 CHF/kWh
Costs for an 800 kg line [1 000 CHF]
59,5
102,9
Annual saving: 43 433 CHF
* based on the same number of cards
Example – Viscose application for rotor yarns
In this comparison, the cards were running with Viscose
for OE yarns. On the C 70, a 30 % better quality
was achieved at a 20 % higher production rate.
When considering the energy expenditure, the C 70
was a class ahead. It required 16 % less energy. Converted
to a year at a production rate of 1 200 kg/h,
this corresponds to an annual saving of approx.
25 000 CHF.
Example – 1 m card with cotton / waste blend for
open-end yarns
Various comparisons to 1 m cards showed an energy
saving in the range of 30 – 45 % - a remarkable
difference! This was documented by means of a field
trial whereby the C 70 with a 42 % lower energy input
achieved more than double the production with
equal quality.
Why is the C 70 more energy-efficient?
The higher production performance of the C 70 positively
affects the expended energy per kg card sliver,
kW/kg. This alone, however, is not the only reason.
With the optimal, comparatively small cylinder diameter
(816 mm), lower amounts are set in motion.
The energy expenditure required to reach the
production speed is consequently also lower. As a
result, less energy must be applied to maintain the
production speed.
C 70 – tested worldwide
Even prior to the Olympics 2012, the C 70 card was
able to prove its effectiveness worldwide in hard
Olympic comparison with more than 300 already operational
cards. 12-104 •
Gerald Steiner
Head Product Management
Blowroom / Cards
Winterthur
gerald.steiner@rieter.com