Successful micro molding machines are highly customized. Some players such as Accumold build their own machines to meet demands of specific molds.
A relatively new German micro molder is working with Wittmann Battenfeld to develop new molding technology. microtechnik HIRT (abbreviated MTH), a specialist in hybrid parts based in Schramberg, Germany, helped developed the 5-axis MicroPower into a 6-axis production cell to facilitate manufacturing of parts with unscrewing functions, helical micro cogwheels and shafts with inclination profiles.
Following mold opening, the mold cavity is driven by a toothed belt installed on the side of the mold to release the molded part for ejection. The ejector subsequently demolds the part with a servo-electric drive, and a new cycle starts as soon as the contour element has been returned to its original position.
It’s also possible to drive thread cores inside the mold to produce high-precision internal threads on molded parts. One example is a focusing device used in cameras to hold lenses in place and/or focus them, or in medical measuring devices to focus optical measurement systems.
The unscrewing unit is integrated into the machine’s Unilog B6 control system
MTH is itself a tiny company with a staff of just three. Founder Franz Hirt sees rapid growth coming for micro hybrid parts in medical technology, electronics, communication and satellite technology, as well as in the automotive industry.