Kistler Instruments Ltd. - PRODUCT NEWS

Torque sensor solves MedTech friction problem

When a dental laboratory commissioned special-purpose machinery manufacturer, Jonas & Redmann, to design and build a highly automated production cell capable of producing and testing five million mixing nozzles per year the company's 30 years mechanical engineering experience was well up to the task but the short cycle time of 1.5 seconds was a problem when it came to the essential 100% final testing.

The mixing nozzles, used to produce the casting compounds used by dentists, are made of four separate parts and are assembled in the production cell and, like many MedTech products, are disposable, use once items. Final testing, a mission critical part of the production process, had to be based on a friction coefficient test (< 0.5 Nm) on the mixing mechanism of the assembled nozzle. Having worked successfully with Kistler on other projects, Jonas & Redmann looked to the sensor company for a solution.

The solution Kistler proposed used a combination of a type 4502A torque sensor and the maXYmos BL evaluation system to check the torque curve for each individual product. The measurement value produced by the torque sensor is used to generate an OK/NOK signal transmitted directly to the control system so that any product with an out of spec torque curve is automatically rejected. This 100% testing ensures that only perfect products are delivered by the production cell.

One important factor in the successful outcome was the close collaboration of Kistler and the consulting engineers who were executing the project. The two teams quickly devised a test rig to verify the solution which, at the first attempt, confirmed that the transducer produced values for frictional torque that were within the tolerances allowed by the system specifications.

The 30 years mechanical engineering experience plus Kistler's precise measurement solutions creates a highly successful end product.

About the Kistler Group
Kistler is the global leader in dynamic measurement technology for measuring pressure, force, torque and acceleration. Cutting-edge technologies provide the basis for Kistler's modular solutions.
Customers in industry and science benefit from Kistler's experience as a development partner, enabling them to optimize their products and processes so as to secure a sustainable competitive edge. The owner-managed Swiss company's unique sensor technology plays a key role in the evolution of automobile development and industrial automation, as well as in numerous emerging sectors. With a broad knowledge of applications and an absolute commitment to quality, Kistler is making an important contribution to the further development of current megatrends. This includes topics such as electrified drive technology, automated and connected driving, emission reduction and Industry 4.0.
Some 2,050 employees at more than 60 locations worldwide are dedicated to developing new solutions and offer customized service for individual applications. Since its founding in 1959, the Kistler Group has grown along with its customers, generating sales of CHF 361 million in 2020. Approximately 9% of this went back into research and technology and thus into achieving better results for all our customers.

For more information, please contact :-

Kistler Instruments Ltd.
13 Murrell Green Business Park, London Road, Hook RG27 9GR
Tel: +44 (0)1256 741550
Fax: +44 (0)1256 741551

November 2021

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