At the recent Drinktec show in Germany, Mold-Masters Europa GmbH (North American office in Georgetown, Ont.) present several new hot-runner developments for PET preform molding. First, the company showed that its micro pitch technology allows a 96-cavity MPET system to run on a 300-ton press, though such a mold normally requires 400 tons, according to Mold-Masters. The company also can run 128 cavities on a 400-ton machine. With micro pitch, 96 water preforms weighing 9.8 g each can fit a 50 x 110 pitch, replacing a 72-cavity 50 x 140 pitch (photo). The switch produces 13% shorter fill time at equivalent injection pressure, even with 24 additional cavities, thanks to the company’s iFlow hot-runner technology. And its iCool mold technology can result in 45% shorter cooling time and 15.5% shorter cycle overall.
Also shown at Drinktec was the PurgeWizard system, now pre-installed on all the company’s TempMaster M2 hot-runner controllers. This is a semi-automated process for chemical and mechanical purging, which steps the operator through the purge sequence for a selected tool. It also maintains a Purge Log.
Editor PickIf Two Arms Are Better Than One, Are Four Better Than Two?
Robots with two main arms have proven useful in applications ranging from stack molds to IML to insert molding and performing a variety of post-mold operations. The concept has evolved to the point that a single robot chassis can have two kick assemblies with one or two arms apiece.