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PRINTING & PACKAGING INDUSTRY FOCUS


FROM CUTTING CARDBOARD TO POSITIONING BOTTLES...


In the packaging industry, high cycle times, precision, reliability and machine stability are


essential features. Designers of the machinery used here are therefore specifying products and solutions from HepcoMotion to meet the exacting demands


used in the furniture industry and for online mail orders, and is able to process cardboard for even the slimmest products.


P


ackaging processes are often complex, and there is a growing demand for


machines which can offer flexibility in cardboard processing. As a manufacturer of machinery for a range of industries, Germany-based G. Kraft Maschinenbau has therefore developed the compact VPS100 automated cardboard cutting machine which is capable of making grooves, cuts, perforations and scores. The machine is available in two


variations – the 1.7m high version which is suitable for cardboard up to 1.5m wide, and the 2.25m high model for cardboard widths up to 2.5m. Tools are installed in pairs in each machine, with the smaller machine holding a range of 4-6 tools and the larger machine accommodating 6-12. Serrated knives allow clean processing of the cartons. The narrowest tools are just 40mm wide and are installed on specially-designed V-shape guide carriages which makes it possible to nest the tools in one another and drive them in very close succession. This makes it possible to create grooves as little as 14mm apart. Thanks to the programmable perforation


rate, the folding behaviour and stability of packaging can be tailored to individual needs, with product changes easily implemented. The use of complex cutters and the availability of a variety of tools also negates the need to reverse the direction of travel of the cardboard during processing. All tools are able to cut, perforate, groove or carve as required, and each tool is moved with its own servo motor. Thanks to the precision of the tools, the continuous stream of cardboard is process-optimised for cutting. According to G. Kraft, the cardboard


cutting machine is ideal for where batch sizes are small and there are frequent product changes. It can, for instance, be


The VPS100 automated cardboard cutting machine


ACCURACY AND PRECISION As well as being able to score, cut and perforate cardboard, the machine can also scratch, a benefit when processing very stiff and unyielding cardboard as


needed to maintain accuracy and precision despite the strong forces, so the design of the guide system to which the tools are attached was critical. When selecting the guidance system, the designers had to consider factors such as how the movement would be carried out, which external forces will affect the guidance system, and how flexible the system must be for the application. HepcoMotion’s GV3 range met the demands. “We decided on the HepcoMotion


guide system as it could accommodate large forces relative to its size and also maintain accuracy at the point of processing,” Bernd Krimphove, head of packaging at G. Kraft, explained. For this application, HepcoMotion


Up to twelve tools can be installed in the VPS100


the cartons can be more easily folded. These processes are made possible by linear motion technology. With a maximum processing speed


of 1.6m/s and the option to process cardboard up to 7mm thick, the machine


supplied slides made of hardened steel, V-bearings and lubrication blocks. G. Kraft developed its own carriage plate and trolley, constructed in a V-shape, allowing the tools to move in very close succession. The V-bearings are responsible for the


smooth running. Each carriage uses two eccentric and two concentric bearings. The eccentric bearings are used to remove play and set preload in the carriage when


DESIGNING A FLOW WRAPPER FOR MID-SIZE BAKERIES


When developing the Delta EZ flow wrapper for tortilla and flatbread applications, the engineers at ILAPAK came up with a design that focuses on what is important to mid-sized bakeries: value for money and sealing performance, rather than high IP ratings or sophisticated networking capabilities. As a result, the machine features a longitudinal sealing system, enabling it to handle the co-extruded


films favoured by food service operators as well as the PET-based barrier films typically used in retail MAP applications. It has two sets of heated rollers for sealing and two sets of variable speed cold rollers for drawing the film through the system, enabling it to achieve best-in-class sealing performance and pack appearance even when handling films with different properties and behaviours, the company explains. The film tension between the two sets of cold rollers – the first and the last set – can be adjusted to accommodate varying film stretch properties, guaranteeing smooth transfer of film through the sealing system. In addition to this, the machine features a multi-belt infeed to enable automatic phasing of individual


tortillas or flatbreads into the folding box, automatic splicing that facilitates rapid reel change, and an adjustable folding box that accommodates products ranging in diameter from 6” up to 14”. The Delta EZ is designed to run off conventional pillow packs with a longitudinal fin at speeds of up to


100ppm with in-built MAP gas flushing capabilities as standard. And, being modular, the machine can be configured to incorporate additional modules such as a reclosable feature or double reel mounting.


ILAPAK www.ilapak.co.uk >> 30  DESIGN SOLUTIONS | FEBRUARY 2020 29


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