Bosch Sprang patents thermoforming tooling


In close co-operation with its parent company Kiefel, Bosch Sprang has developed a new patent pending thermoforming tooling system for the production of polypropylene (PP) coffee cups which can be recycled in water separation systems thanks to their material density below 1.000 kg/m3.

The new tooling system has been statistically analySed as well as tested and can be adapted to most tilting bed style thermoforming machines. Consequently, it does not require any special machine adaptions.

The propriety technology is based on several multifunctional elements in the tool that enable and control the realisation of specific mechanical properties of the coffee cups. These mechanical properties ensure problem free usage of the cups in all commercial K-cup coffee systems. The production of cups can only be consistent if the sheet specification, the process parameters and tool are well balanced.


The production line is based on a Kiefel KTR 6.1 Speed, a Bosch Sprang 91 cavity tool and Mould & Matic downstream equipment. With its production capacity around 1 billion cups/year (24/7) this production system represents Kiefel’s ability to provide turnkey solutions, says the firm.

The production line was presented to the public for the first time at Kiefel’s technology day recently.

Kiefel says the KTR 6.1 Speed sets new standards with more power, more forming area, more speed. This leads not just to higher output and new trend products. It also offers the opportunity of processing a wider range of materials like rPET, PP, PS, PLA, PE and others, inclusive foamed plastics. The customised automation is completed by a Pick-up Stacker.


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