Advanced mass finishing solutions for coin blanks,
dies and collector coins
Rösler mass finishing solutions are trusted by mints worldwide for cleaning, polishing and brightening coin blanks and minting dies with exceptional precision. Our processes cover all critical steps: degreasing, cleaning, polishing, passivation and drying for coin blanks, as well as surface smoothing and finishing of raw and final minting dies.
By embedding coin blanks and minting dies in grinding and polishing media, our processes deliver uniform, reproducible surfaces that ensure perfect results through vibration, centrifugal, rotation or drag motion.
Rösler Multi-Surf-Finisher
for polishing dies
Machine and process concept:
- Selective and defined machining of clampable workpieces with complex geometry through spinning working bowl
- Damage-free single part machining "One Piece Flow“
- High machining intensity due to adjustable parameters:
- Speed of the working bowl
- Variable immersion depth in the media
- Variable Inclination Angle of the work spindle
- High reproducibility in connection with a high degree of automation
- Possibility of linking with existing prefabrication (e.g. CNC machining)
- Short cycle times in combination with the various possible applications
- Shorter machining times than drag grinding, combined with high removal rate
Rösler portfolio for coin processing
Fully automatic MPA…/A2 coin blank finishing system
Globally, the professional surface finishing of blanks for circulation coins is done in fully automatic Rösler centrifugal disk finishing systems, type MPA. The equipment design, perfected down to the last detail, is available in different sizes and versions and can be adapted to a broad range of finishing tasks.
Processing unit, type MPA…E/SA
The blanks for collector and conmemory coins as well as medals require an extra careful finishing step prior to coining. Fully automatic processing with multiple treatment programs and extremely gentle work piece transfer without any tumbling steps allows the perfect, impingement-free processing of the most delicate blanks.
Drag finisher
Drag finishing with the work pieces mounted to special fixtures, offer a wide range of treatment options, from intensive cut-down to surface smoothing to high gloss polishing. Due to the fact that the hubs and dies are mounted to fixtures, they will not touch each other during the process.
Special rotary vibrator
Up to 20 dies can be processed in one single batch. These special rotary vibrators can be used for polishing of the hubs as well as placing the final mirror finish on the dies with the final motive.
Multi-Surf-Finisher
The Rösler Multi-Surf-Finisher (RMSF) provides fully controlled, reproducible finishing for minting dies. Its flexible, automated process delivers uniform surfaces, reduces defects, and ensures high-quality results every time.
