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Article | January 14, 2014
Multivac: Thermoforming die technology and automation
Allows production of portion packs and saves packaging material.
Multivac’s use of wide and long dies in the thermoforming packaging procedure means that even at relatively low cycle rates a large number of portion packs can be produced.
In some customer projects customers have achieved 960 portion packs/min at just 15 cycles per minute. Since the packaging machine manufacturer has designed a slower packaging procedure, this can be controlled even at a high output. This has a positive effect on the upstream and downstream processes such as filling, cutting, quality control, pack handling. and secondary packaging in boxes.
These allows manufacturers of portion packs to achieve a maximum output from their thermoforming packaging line, since the plus factor in the process control is not gained at the expense of the number of packs produced.
Multivac’s cutting technology leads to a reduction in packaging material consumption. In order to cut the large number of packs cleanly out of the film, the technology positions two cutting tools, one after the other. These cut the portion packs out of the film in two stages, similar to the pattern of a chess board.
Since not all the packs are cut out at once, the partitions between the packs can be designed to be narrower than with conventional die processes. Thanks to the reduction in the widths of the partitions, manufacturers of portion packs can save on the amount of packaging material. This also makes the investment in this cutting procedure economically viable.
Also, the easily controlled cutting procedure has a positive effect on the handling of the portion packs after cutting. Since "only" half the packs must be removed per cutting tool, the removal from each cutting tool and the transfer of the packs to downstream processes, such as secondary packaging in boxes or quality inspection, can be performed in a controlled manner.
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