GERMANY • Renzmann, a manufacturer of washing machines and distillation units for the graphic arts industry, focuses its drupa stand (D39 in Hall 16) on optimizing industrial washing processes. Because shorter print runs and frequent job changes mean print shops have to wash greater quantities of press components and accessories, many are looking for more efficient ways of cleaning ink-carrying press parts. Renzmann said it presents solutions for a “clean” printing process as well as systems that ensure time- and cost-saving cleaning of press parts.
One offering is its Flexplatecleaner, which according to the company cleans and dries flexographic printing plates using a fast and automated process. The system comes with a patented transport system that allows the speed of the plates to be regulated individually via a manual potentiometer. The contact pressure of the washing rollers is automatically adjusted to the thickness of the plate. After cleaning, the plates are ready for reuse.
Another offering is its next generation washing machine model 3400, which meets the highest efficiency and safety requirements. The explosion-proof and ATEX-compliant machine cleans press parts, ink pans, doctor blades and buckets using spray pipes that oscillate around their longitudinal axis. ensure optimal cleaning results. The washing machine 3400-e uses short spraying distances and a powerful pump, has no accessories, and has a robust and maintenance-friendly design, the company said.
Another focus for drupa concerns how climate and emission protection regulations make specific demands on cleaning processes, especially if they involve solvents. The Rotomax-e 20 distillation unit has a distillation output between 60 and 120 liters (16 and 32 gallons) of solvent per hour and, according to Renzmann, achieves a recovery rate of approximately 94 percent. By minimizing the quantity of highly viscous, disposable residue, the unit cuts both disposal and solvent costs and actively contributes to protecting the environment.