Redfern Converting Machinery

Redfern Machinery

Redfern Machinery Blog for used printing & converting machinery

  • Universal Converting Equipment upgrade to Ashe Slitter

    Redfern Converting recently installed a 2006 Ashe Sapphire mark II slitter rewinder at the new site of Infiniti Films. Infiniti Films is a supplier of converted high grade films with the additional facility to offer on-machine corona treatment for better adhesion when printing or coating.

    After installation, a number of problems were found with the machine which included safety circuits which didn’t conform to regulations, rewind tension control not working and the unwind control not working. It was decided to replace the control system. Universal Converting Equipment was selected as the best company to work with. An order was placed with Universal just before the Christmas break and due to the urgent need, the new system was installed in the first week in January. The system based on their well proven X6 design was completed to schedule with the control software working perfectly to plan. Obsolete components were removed and a new 22” colour touchscreen operator interface installed.  In addition, new differential ball lock shafts were introduced and a new corona treater added in-line. The slitter is 10 years old and now has an up-to-date control giving many more years extended life but shows what can be done with existing used equipment. Redfern can offer similar upgrades to any of their stock machinery. For further information please contact Richard Redfern. richard.redfern@redfernmachinery.com

    Ashe Slitter Rewinder model Sapphire II Slitter Rewinder control system upgrade by Universal
  • Packaging Industry - Converting Machinery

    Converting machinery processes for the packaging  Industry

    Die-cutting

    Die-cutting is used to support processes in packaging, labelling and printing. Flat bed die-cutting is used for sheet materials, which require cutting, creasing in preparation for folding, embossing and separation of unwanted sheet areas. Paper and corrugated board are commonly processed with die-cutting along with plastic materials.

    A flat bed die-cutter is highly configured according to the production requirements. It can be integrated into a complex multi-print production line or made to operate stand-alone. Material is first fed into the cutter using suction or mechanical movement before it is registered with the cutter to ensure accuracy. The substrate material is subjected to pressure between the die and cutting plate in order to execute the desired process of cutting, creasing etc. Waste material is removed by stripping tools and a blanking set-up produces a stack of flat blanks for delivery or a continuous linked set of blanks, which can be easily separated when needed in the packaging or other process.

     

    Hot foil stamping

    Hot foil stamping is used when decorative effects or anti fraud effects are required. The process is used in the packaging industry, including food. Commercial printing processes use Hot foil stamping such as in paper currency.

    Heat and pressure are used to apply metal foil to other substrates including paper, corrugated board and plastics. Common effects achieved include embossing and holograms. Metallic foil is fixed to the target substrate via a layer of glue which is enabled by a combination of pressure from a die combined with heat. Hot stamped foils have layers including a polyester base, image layer, lacquer and metal. The required image can be hand crafted or produced by a computer-controlled machine. The process can operate stand-alone or integrated within a multi-print line sheet or web-fed.

  • Packaging Industry - Printing

    Flexo Printing

    With technological advancements in plate making and press manufacturing the use of flexography has bridged the quality gap that once separated it from other printing processes.

    Developments in direct laser engraving have opened new possibilities for the flexographic printing industry. Direct laser engraving improves print quality and cost efficiency. Start-up, waste, registration, make-ready time and print speed are all improved in today’s press design.

    Various working widths can be realized using a single mandrel size with adaptors added for change of repeat length.

    Fewer cylinders are required for a given press, reducing investment costs.

    Low sleeve weight facilitates ease of handling.

    Only sleeves need to be transported leaving the sleeve mandrel in the press.

    Storage of rubber covered cylinders is no longer necessary.

     

    Rotogravure printing process

    Rotogravure printing allows printing onto a variety of substrates including fibre, wood-based, or laminated material including synthetics, paper and metal foils. Today’s rotogravure printing presses use engraved cylinders, which can retain ink finely enough to produce the required image, when applied with pressure to the substrate material. Gravure printing is used extensively in both food and other packaging applications including wallpaper and labels. Rotogravure presses are usually arranged in-line with printing units added as required. An engraved printing cylinder – a tube without seams, made from steel, aluminium of other engraveable material. The engraving represents the required finished image. A device or blade removes excess ink before a rubber roller presses the engraved surface against the substrate material creating the image.

    Inks may be solvent or water-based and accordingly driers are added to each print stage and the power of the driers is calculated in proportion to the print speed of the line. The substrate is then ready to receive the next colour or varnish.

    The rotating print cylinder collects ink so that engraved cells are primed with ink before excess ink is removed and the cylinder surface is pressed against the substrate material by pressure rollers. Capillary action assists the transfer of ink.

  • Used Uteco Flexo Press Onyx 810 GL

    Redfern recently installed an 8 - colour gearless press.

    The Uteco Onyx was successfully transferred from Italy to UK and is producing high quality packaging products at a well-known UK printer. the model 810 has a long print repeat for specialised printing. the machine was transported overland and installed in record time. 8colorprinter

    You can see more information on Used Uteco Packaging Machinery here..

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