Small-machine specialist Dr. Boy GmbH & Co. KG rolled out its E Series injection press at NPE2012, and rolled out — literally — a portable, bolt-on injection unit on wheels.
E Series machines use a servomotor pump drive to run the hydraulic clamp. Boy Managing Director Carl Schiffer said the German company has been using the technology on its larger presses, but now E machines come in smaller sizes.
At NPE, held April 1-5 in Orlando, Boy displayed an E with 22 metric tons of clamping force. “It's a good synthesis between a hydraulic machine and an all-electric machine,” Schiffer said in an interview at Boy's booth.
All-electric presses have gained a lot of attention, especially in the smaller machines that are Boy's strength. But Schiffer said Boy favors servo-hydraulics, also known as electro-mechanical presses, be- cause they are less expensive than all-electrics, with better performance in areas like pressure control and lower-priced spare parts.
“We are, in general, confident with our concept of the servo drive,” he said.
A 90-tonne Boy 90 E molded two-shot sunglasses. The bolt-on, portable injection unit on wheels has its own controller that can be disconnected and put on any machine, Schiffer said.
Also new from Boy: the 35 E VH, an insert molding press with vertical clamp and horizontal injection. Injection is done on the parting line.
Boy also was making a micromolded part from liquid silicone rubber. The 10-tonne XS-V sported an LSR pump and mixing block, that are the right compact size, made by Efficient Metering Technology of Werdohl, Germany.
EMT President Klaus Germeshausen said his company had mainly targeted the water-based-adhesives market, but teamed up with Boy to enter the injection molding press arena.
EMT's LSR metering system has fewer mechanical parts than traditional units. The extremely short static mixer does not have a flow regulator or a stop valve.
Boy Machines Inc. of Exton, Pa., the U.S. unit of the Fernthal, Germany-based Dr. Boy, sold a 55-tonne Boy E press off the show floor to International Polymers Corp., a compounder in Allentown, Pa.
Schiffer said demand is growing for injection presses, but shipments will only reach about half of their peak levels.
“The market is improving. Still, we are not back where we were 10 or 15 years ago,” he said.