An Interview with Werner Runft, Machine Design & Development

Expertise Series

Germany is renowned globally for well engineered and quality products. What influenced you to become an engineer?
When I was a young man I was interested in model railways, erector sets and model air planes. These hobbies lead me to study design engineering.


Why did you choose to work for BOSCH?
My father was a gardener and one of his customers was a Bosch manager. He asked if the manager could help me get a job. It is this relationship that lead me to work for Bosch.


What machines have you worked with in your current position?
I started to work with antibiotic powder fillers (AFG) and capper machines. These products are now built in Crailsheim, Germany. Here in Waiblingen I have worked with a long line of capsule filling machines, including the GKF 700, GKF 2000, GKF 2500, GKF 1400, GKF 1700 HiProTect, the Micro-Dosing filling module and the KKE 2500 checkweigher. I have also been involved in the development of products that have not been released yet.


What current development projects are underway on the GKF capsule filling machine line?
Our team is working on the next generation of production units, focusing on cleanability (WIP/CIP), the control system, and modular filling systems.


What do you see as the main advantages in our Bosch GKF capsule fillers?
Our design principle is the most copied solution for capsule filling. Bosch created the dosing disk tamping style machine more than 50 years ago. The movements of the machine are transparent to operators for trouble shooting empty capsule or filling problems. Naturally the machine has a flexible platform for modular filling systems. Our 100% feedback control for weight is also
widely accepted.


Can Bosch capsule fillers actually run at their maximum speed of 140 cycles/min? Or is the listed mechanical output theoretical?
When you have a well-flowing product and your capsules are in good condition, as long as your weight is within tolerance, the machine is capable of running at maximum speed throughout the entire shift.

Prior to the GKF 2000, the GKF 1500 was capable of 125 cycles/min. The GKF 2000 was engineered in 1996 to run at 150 cycles but programmed and marketed at 140. 140 is certainly possible.


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