KHS develops new packaging concept with Rexroth
06 July 2010
KHS, a provider of filling and packaging technology in the beverage industry has implemented decentralised servo drive technology. The latest upgrade is centred around Bosch Rexroth’s IndraDrive Mi.
Dirk Langanki (left), Manager of Electrical Construction and Development at the KHS Competence Center for Packaging Technology, in a discussion with Steffen Winkler, Bosch Rexroth AG
The company has used Rexroth’s servo and control technology since the mid-1980’s and at the beginning of 2000, KHS introduced a comprehensive, modular machine program into the packaging industry, using combinable mechatronics modules.
Its next step was to implement the decentralised servo drive technology. The IndraDrive Mi’s motor housing surface serves as a heat sink for the drive’s control electronics, which are mounted flat on the motor, creating little change in its shape. Furthermore, only a single cable is required for power supply and communication. By connecting multiple IndraDrive Mi units in series, the number of required cable connections is reduced even further. However, the most significant benefit is that additional drives can be added in the future, without requiring changes to the control cabinet.
IndraDrive Mi combines high power density with full functionality and is compatible with the Rexroth IndraDrive family. The servo drives are equipped with hundreds of advanced technical functions, including integrated Motion Logic (in accordance with IEC 61131-3). With this capability, totally new decentralised automation architectures become possible.
Using the new integrated motor/drive concept, KHS has built a machine for the Innopack Kisters SP series, which is used to shrink-wrap wine bottles. Along with the Innopack Kisters SP shrink packers, the series provides the complete power range from 35 to 150 cycles per minute in continuous operation. The machines package cans, jars and bottles as well as pre-packaged products in the beer, soft-drink, hygiene, food and non-food industries.
Additionally, these machines allow the economic creation of multi-packs with clear, scatter-printed or pinpoint-printed foil. The packaging costs remain low because shrink foil is used as the only packaging material. The drive is controlled using Motion Logic by Rexroth for one to three-row processing, where the speed automatically adjusts to match the actual line capacity. Downtime is reduced because of the high degree of user-friendliness and the diagnostic system, which is integrated into the HMI screens.
KHS is able to combine the machine modules with greater flexibility using IndraDrive Mi technology. For example, with the addition of two extra modules, a shrink packer becomes a tray shrink packer: simply, two additional IndraDrive Mi drives are added to the existing seven while in the control cabinet nothing changes.
“With the use of IndraDrive Mi, the system costs are significantly reduced,” says Dirk Langanki, manager of Electrical Construction and Development at the KHS Competence Centre for Packaging Technology. “This particularly affects the required installation effort for the control cabinet and wiring.”
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