High efficiency due to automatic changer for cans up to 1 000 mm
The automatic can changer for diameters up to 1 000 mm is a unique feature for a double-head draw frame. This results in long running periods without personnel intervention and consistently high production efficiency. Slumps in efficiency of up to 10 %, particular in spinning mills with overloaded personnel, can therefore be prevented.
In mill operations with carded cotton the SB-D 22 produces 3-6 tons more sliver per day than conventional double-head draw frames. Otherwise the automatic can changer enables a larger number of machines to be allocated to each operator compared to conventional double-head draw frames without changer. For example, up to six SB-D 22 draw frames can be allocated to an operator instead of only four conventional double-head draw frames.
Very easy operation of the drafting system
Central setting of the drafting system is a unique feature of the SB-D 22 double-head draw frame and enables rapid product changes. Break draft and main draft distances can be set independently of each other. The roller gaps can be read off a scale, which makes setting gauges unnecessary. The belts can remain tensioned during setting. All mechanical settings can be performed with a single key.
Compared to conventional double-head draw frames, a single mechanic can adjust the roller gaps – whereas other double-head draw frames require in some cases two people for this operation. Precise parallel movement of the bottom rollers by the centralized adjustment mechanism is also assured, thus guaranteeing superior quality values of sliver and yarn as well as a long durability of the bearings.
Small space requirements
The SB-D 22 also stands out with regard to space requirements. Machine width including the 1 000 mm can changer totals only 2.98 meters. The machine can be mounted on the floor or sunk into the floor. The latter reduces machine length by one meter.
Low energy consumption
Belt drives instead of complex geared solutions and the small number of motors and inverters keep energy consumption low. The short drive chain compared to other double-head draw frames and the highly efficient motor technology result in low power consumption. Energy consumption is some 20 % lower than on comparable double-head draw frames due to the well-conceived drive system. Calculated with energy costs of 0.09 USD per kWh this results in savings of 1 000 USD per year and draw frame.
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