Inject_1_2012_en.pdfDownload - Sumitomo (SHI) Demag
Inject_1_2012_en.pdfDownload - Sumitomo (SHI) Demag
Inject_1_2012_en.pdfDownload - Sumitomo (SHI) Demag
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ENERGY EFFICIENCY<br />
Fitness cure for injection moulding machines<br />
Speed-regulated smartDrive pump drive increases <strong>en</strong>ergy effici<strong>en</strong>cy<br />
The <strong>en</strong>ergy effici<strong>en</strong>cy of hydraulic injection<br />
moulding machines can also still be<br />
increased considerably. With its smart-<br />
Drive speed-regulated pump drive, <strong>Sumitomo</strong><br />
(<strong>SHI</strong>) <strong>Demag</strong> offers its customers<br />
a retrofitting design promising optimum<br />
levels of effectiv<strong>en</strong>ess and savings in <strong>en</strong>ergy<br />
of up to 40 %. The dynamic performance<br />
adjustm<strong>en</strong>t of the pump drive<br />
motor, allowing for the individual adjustm<strong>en</strong>t<br />
of every cycle phase, also helps<br />
contribute to this.<br />
<strong>Sumitomo</strong> (<strong>SHI</strong>) <strong>Demag</strong> integrates smart-<br />
Drive operation into hydraulic injection<br />
moulding machines in the Ergotech series<br />
within the context of its retrofit<br />
programme. This retrofitting is the simplest<br />
way to achieve considerably lower<br />
<strong>en</strong>ergy consumption and thereby greater<br />
cost-effectiv<strong>en</strong>ess. All that is needed is<br />
clamping a frequ<strong>en</strong>cy converter in front<br />
of the asynchronous pump drive motor<br />
thus regulating its speed. The alternative<br />
use of a dynamic servomotor and of a<br />
fixed displacem<strong>en</strong>t pump requires considerably<br />
higher investm<strong>en</strong>t costs.<br />
Frequ<strong>en</strong>cy converter can be adjusted<br />
to each processing phase<br />
The functions of the smartDrive can be<br />
operated via the NC4-control of the<br />
machine. The machine is switched from<br />
standard operating to <strong>en</strong>ergy-saving<br />
mode by operating a soft switch. Every<br />
machine axis and every process phase<br />
can th<strong>en</strong> be integrated or switched out<br />
of the smartDrive <strong>en</strong>ergy saving function<br />
separately. During the injection moulding<br />
process, for example, the injection<br />
phase can be operated in standard<br />
mode, but the hold pressure phase can<br />
be operated in <strong>en</strong>ergy-saving mode. The<br />
“High Dynamics” function leads to the<br />
dynamic speed of the pump drive being<br />
increased in ample before a machine<br />
axis actually starts up. The time readings<br />
displayed for at-rest and active smart-<br />
Drive phases, refer<strong>en</strong>ced to the overall<br />
cycle time, allow the operator to obtain<br />
a precise <strong>en</strong>ergy analysis for the cycle.<br />
As the user can flexibly allocate the<br />
<strong>en</strong>ergy saving function to the individual<br />
machine axes and process phases and<br />
does not have to let the <strong>en</strong>tire cycle be<br />
affected, the smartDrive solution wins<br />
out over frequ<strong>en</strong>cy converters working<br />
according to other designs.<br />
In the case of various machine functions,<br />
the converter would react too slowly,<br />
which could have negative effects on the<br />
cycle time, process reliability or product<br />
quality. If certain production orders are<br />
to be executed in non-<strong>en</strong>ergy saving<br />
mode, this can also be done without any<br />
restriction.<br />
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