Electrically powered extrusion blowmolding machines are hardly new, and officials at Bekum (Berlin, Germany) admit as much. But, they insist, just changing a drive from hydraulic to electrical power does not make for a better machine, so they bided their time and kept developing until last week's K show in Düsseldorf, Germany, which was the global premier of Bekum's Eblow machine.
Working in an exclusive relationship with Bosch-Rexroth, the two developed a hybrid drive for the machine's closing system. The drive is optimized to handle the transition from rapid motion (mold close) to force motion, and is fully adjustable and stroke-independent. Maximum force build-up is available immediately after the switchover. Even with all of this force, the unit is a quiet 68 dB.
The Eblow is the commercially ready version of an electric extrusion blowmolding machine that Bekum displayed at the K show in 2007....