Pittsburgh — Officials of two machinery makers that make all-electric blow molding presses touted the technology during presentations at the Society of Plastics Engineers' Annual Blow Molding Conference in Pittsburgh.
Italian machinery maker Magic MP SpA is selling the third generation of its all-electric blow molding machine, said Celestino Spiga, area manager. He said Magic began making all-electrics about 20 years ago. Company leaders found that the fully electric blow molders were more repeatable and precise than hydraulic machines, removing the variables of oil temperature and viscosity.
"The basic concept came from our customers," Spiga said. "They, from the beginning, were looking for all-electric because it is cleaner and no oil." At first, the presses went into cosmetic and clean room pharmaceutical package, all-electrics have spread to a wide range of markets, he said.
He explained the technology behind Magic's all-electric extrusion blow molders, which uses rack-and-pinion transmission. Electric motors run the two key axes of motion: clamp movement and the blow pin operation. The all-electric blow molders use 30 percent less energy than hydraulic presses, Spiga said.
Magic, based in Monza, Italy, has produced more than a thousand fully electric blow molding machines since it began making them in 1997, Spiga said. The company makes more than 100 machines a year — every one of them all-electric.