The medium-format Rapida 105 was unveiled by KBA in November 2011. This new sheetfed offset press has significant differences to previous generations.
The Rapida 105 is based on the same technological platform as the high-tech Rapida 106 that, with a maximum output of up to 20,000 sph and its makeready times, defines the benchmarks in medium format. Its intelligent automation concept, various configurations and optional features available combined with a maximum production speed of 16,000sph (17,000sph with the HS speed enhancement package), the internationally successful Rapida 105 targets printers with limited in-vestment budgets. Since Drupa 2012, the new press has been available and sold as a long perfecting press for 4-back-4 and 5-back-5 printing. Its sheet travel systems and maximum sheet format makes its superior to presses from other well-known manufacturers, who still print with single-size impression cylinders without washing units.
The Rapida 105 perfecting press also features double-size impression cylinders and transfer systems as standard. Sheet travel has become even more streamlined thanks to the substructures and printing units taken from the Rapida 106. The quick-reacting inking units with a single-train ink feed and large rollers for less waste are identical to those found in the Rapida 106. The console’s preset capability, smooth running and contact-free sheet transfer supported by Venturi air-cushioned sheet guides, a feature not found in many comparable presses. This predestines the new Rapida 105 for perfecting, even when using heavy substrates. Its universal grippers accommodate any changes in substrates without adjustments. All registers can of course be remotely adjusted at the ErgoTronic console or automatically checked and corrected with ErgoTronic ACR.
Perfecting with Rapida 106 technology inside
The three-drum perfecting system in the Rapida 105 which ensures an output of up to 14,000sph in perfecting mode, is the same as in the Rapida 106, that has a maximum output of up to 18,000sph. There are opportunities to increase the Rapida 105’s output in future. Precise perfecting register is achieved with a broad range of substrates. The fully-automatic conversion between straight and perfecting mode and vice versa only takes two minutes. The Venturi system also prevents the substrate from coming into contact with certain press components before the printing zone. Mechanical guides are only needed when printing with carton board.
Jackets on the impression cylinders after perfecting ensure invariable quality on both sides of the sheet. The drum shells feature an anti-marking coat and twisting suckers spread the rear edge of the sheet tight on the storage drum when perfecting. Sheet travel below the perfecting drum and in the delivery can be observed via a video system allowing the airstream to be adjusted precisely. All settings for sheet travel from the feeder to the delivery can be saved and recalled for repeat jobs.
Intelligent automation boosts efficiency
Long Rapida 105 perfecting presses with optional automated plate changers score points when it comes to the time saved during job changes. In just five and half minutes, including the necessary register zeroing, all plates are changed in eight or ten printing units.
KBA CleanTronic ensures fast washing with job-specific preset programs. Dry cloths and ready-impregnated cloth rolls are used instead of commonplace, high-maintenance brushes. Collection tanks or feedback systems for used washing materials are not necessary in the Rapida 105. One roll of cloth lasts up to 200 washing cycles. KBA CleanTronic is easy to operate and up to three minutes faster than conventional brushing systems. Parallel washing programs cut job changeover times. Along with a swiveling washing bar for combined blanket and impression cylinder washing, also available is a multiple-media washing system (CleanTronic Multi) for different ink use and a safety function to eliminate waiting times before the cylinder is washed when printing with UV inks. Additionally, the “print clean” function removes the remaining ink from plates and blankets, thus slashing the time need for washing and the use of resources.