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Press Releases

[01.04.12]

NPE 2012: Speed and Precision Paired with High Holding Forces

Hydraulic and electric drive technology play out their strengths in application-specific hybrid system solutions.
Rexroth teamed up with Berlin-based BEKUM Maschinenfabriken GmbH to develop a hybrid drive for the closing system of blow molding machines. The drive not only meets dynamic axis requirements, but also the need for fast, stroke-independent buildup of force at closure and contemporary (low) energy consumption and noise levels.

The innovative hybrid drive leverages the benefits of hydraulic and electric drives to maintain applied forces over extended periods and gently buffer fast changes in direction. It is also efficient, precise, and minimizes noise emissions. To develop this system, which does without a classic hydraulic setup with tank and displacer unit, both partners had to break new ground.

A hydraulic gearbox was fitted between the electric drive and linear axis for the closing system of blow molding machines and is used to convert rotary to linear movement and provide for targeted switching between rapid and power strokes. This considerably reduces the loads for the drive side and the ball screw drive. A locking function in the hydraulic gearbox enables the closing force to be held without drive torque, similar to a classic hydraulic machine.

Internal tests and initial field applications confirm the everyday suitability of the new development.

The hybrid drive can also be used for closing systems involving other applications, such as presses and injection molding machines. This innovative, customized solution is just one example of the many years of experience Rexroth has gained as an engineering partner in development projects.


Bosch Rexroth AG is one of the world’s leading specialists in the field of drive and control technologies. Under the Rexroth brand name, the company supplies more than 500,000 customers with tailored solutions for driving, controlling, and moving. Bosch Rexroth is a partner for Mobile Applications, Machinery Applications and Engineering, Factory Automation and Renewable Energies. The company provides customized solutions tailored to the needs and specifications of each individual market. As The Drive & Control Company, Bosch Rexroth develops, produces, and sells components and systems in over 80 countries. As part of the Bosch Group, Bosch Rexroth and its 34,900 associates generated approximately 5.1 billion euros (6.8 billion) in revenue in 2010.

To learn more, please visit www.boschrexroth-us.com.

The Bosch Group is a leading global supplier of technology and services. According to preliminary figures, more than 300,000 associates generated sales of 51.4 billion ($71.5 billion) euros in the areas of automotive and industrial technology, consumer goods, and building technology in fiscal 2011. The Bosch Group comprises Robert Bosch GmbH and its more than 350 subsidiaries and regional companies in some 60 countries. If its sales and service partners are included, then Bosch is represented in roughly 150 countries. This worldwide development, manufacturing, and sales network is the foundation for further growth. Bosch spent more than 4 billion euros ($5.5 billion) for research and development in 2011, and applied for over 4,100 patents worldwide. With all its products and services, Bosch enhances the quality of life by providing solutions which are both innovative and beneficial.Additional information can be accessed at Further information is available online at www.bosch.com, www.bosch-press.com.



For more information, please contact:

Bosch Rexroth Corporation
Susan Strauss
2315 City Line Road
Bethlehem, PA 18107
Telephone (610) 694-8352
Fax (610) 694-8266
susan.strauss@boschrexroth-us.com

Godfrey Public Relations
Todd Walter
40 North Christian Street
Lancaster, PA 17602
Telephone (717) 393-3831 ext. 133
Fax (717) 393-1403
twalter@godfrey.com
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