DÜSSELDORF, GERMANY (Oct. 29, 11:15 a.m. ET) — Desma has chosen K 2010 to present substantial revisions to its “Benchmark” series of vertical injection moulding machines for elastomers (Hall 16 Stand F56). New series 3 Benchmark machines feature servo-driven hydraulics for the first time.
The two-pump system, branded “ServoGear”, is claimed to stand out because of its approximately 45 % lower energy consumption for normal movements in a four-minute cycle. In real terms, says Desma, this adds up to around a 10-13 % saving in overall energy consumption.
The system is also claimed to offer more precise positioning and “impressively” low noise levels. The hydraulic lines are mostly ducted or integrated into the mould carrier plates, so minimising the number of hoses. Desma´s patented “FIFO A” injection unit has been redesigned; the latest version is branded “FIFO-Advanced”. Large silicone stuffing systems can now be integrated, even with small injection volumes. In addition, the injection unit can be fitted with an actively driven feed roller, “ActiveFeed”, enabling the handling of material strips with double the thickness possible on comparable units. The injection unit can even feed in strips with serious fluctuations in width and thickness, says Desma, with a view to offering greater flexibility in material procurement and hence cost savings.
Benchmark S3 machines also feature a newly developed non-return system. The hydraulically operated non-return valve is branded as “PlastControl” and patents have been applied for. According to Desma, the result is approximately 50 % more accurate dosing. This is a particular advantage when handling low-viscosity materials such as liquid silicone, says the company, because the non-return valve can be actively closed. Material changes and cleaning are facilitated. Desma points to more efficient material usage and “the lowest possible level” of product reworking.