German injection molding machinery maker Arburg GmbH + Co. KG introduced a new entry-level version of its Allrounder Alldrive line of all-electric machines during its Technology Days open house March 23 at its headquarters at Lossburg.
Available in four models with clamping forces of 60, 100, 150 and 200 metric tons, Arburg said the machine is pitched as an electrical alternative to basic hydraulic machines.
Chairman Michael Hehl said the new machines will enable the energy and emission savings of all-electric machines to be realized in production of standard technical parts. The company presented data it said shows Edrive machines deliver energy savings of up to 50 percent, depending on throughput rate, over a conventional, two-pump hydraulic machine and up to 35 percent compared with its Allrounder Advance hydraulic machines with energy-optimized drives.
The Edrive will be about 22 percent less expensive than Arburg's existing all-electric Alldrive machine, putting it in the same price range as the company's hydraulic Allrounder S Advance and around 15 percent more expensive than the hydraulic Allrounder S.
Herbert Kraibuhler, technical managing director, said the cost saving has been achieved by designing the machines with lower dynamics and drive power than the higher-performance Alldrive machine. The Edrive specification uses ball-screw drives with no cooling, rather than the cooled gear-spindle drive used on the higher-performance machines. Dry cycle times are said to lie between those for the Alldrive and conventional hydraulic machines.
Arburg also has opted for a more standardized design, which Kraibuhler said means the Edrive model will not be offered in a multicomponent version. That means higher modularity, which in turn means higher costs, he said. Versions will, however, be available for liquid silicone rubber processing and clean room applications.
The Edrive is, however, a fully all-electric unit using servo-electric motors for the double five-point toggle clamp, ejection, core pulling, nozzle movement, injection and dosing.
Hydraulic options are available for auxiliary functions ejection, core pulling and nozzle movement if required.