When Negri Bossi and other leading European OEMs brought out their first all-electric models in the early 2000s, the consensus was that within a few short years, hydraulic models would be a thing of the past.
A downward trend in energy prices followed, making payback on a more expensive technology difficult to justify. The hydraulic machine also benefitted from a general move towards servo-pump technology.
Things have however also moved on for all-electric technology, the latest machines offering much more than energy efficiency. Negri Bossi’s own ‘fourth-generation’ offering, the NOVA eT, is a case in point. These machines still use significantly less power than hydraulic models, but this is coupled with:
- Unparalleled levels of accuracy
- Faster cycle times
- Higher injection speeds and pressures
- Low noise levels
- Minimal cooling requirements
Following delivery of their first NOVA eT machine, IVM’s Managing Director Ian Davidson commented,
“The level of performance that the new machine offers is extremely impressive. The original cycle time of a key component has been reduced from 23.5 to 17.8 seconds, and we believe that there are still more savings to find. Hold and cooling phases are obviously fixed, but we now have the ability to eject components ‘on the fly’, combined with significantly faster material injection rates and opening and closing speeds.”
“Operating at high speed obviously raises concerns over mould safety, but the machine monitors motor torque so precisely, that we are able to trigger mould safety protocols with slivers of cardboard or apple peel.”
Although faster cycle times are always welcome, the main motive for IVM’s investment was a gain in levels of accuracy and minimising levels of non-conforming product:
“Our six-impression lens tool has been running with a phenomenal 0.01mm variation in mould cushion. We are also able to inject material at much faster rates and with greater levels of control. This has minimised moulding defects such as material flow lines, as well as reduce levels of ‘start up scrap’, as we are achieving optimal processing levels very quickly.”
All-electric machines are still more expensive to manufacture, so to help companies to justify their investment in the latest technology, Negri Bossi are now contributing 10% towards the machine purchase price. This initiative will apply to all NOVA eT machines delivered within 2018.
Models are available from 50 to 350 tonnes, with a 130-tonne machine available to view at Negri Bossi’s Rugby-based showroom.
For more information, get in touch on the below.