Case Studies
29/08/2017 |
Reliable Sesotec sorting systems convince the Swiss
About RecyPET
In Switzerland used beverage bottles are sorted, after collection, in five primary sorting plants by colour and quality, compressed into bales and delivered to RecyPET AG, and other recycling operators, for processing. RecyPET’s goal is closed loop recycling for PET beverage bottles. The recyclate produced is used to make a number of products including new PET bottles, food packaging films and other film.
Task
Sesotec supplied a PETMAG metal separator to RecyPET in 2001to separate metal contaminants from PET flakes. As colour sorting was also required, Sesotec, working closely with RecyPET, developed a colour sorter for PET flakes based on a unit originally used in the glass recycling industry. The result was the SPECTRUM range of colour sorters which with double-sided inspection can also separate flakes contaminated with glue residues.
Solution
During 2010 the PETMAG , which had proved a reliable and effective metal separator with minimal maintenance costs, was replaced with the latest generation VARISORT COMPACT combining metal and colour sensors in the same unit.
Product Advantages
The vibratory feeder and fast inspection belt systems of the VARISORT COMPACT combine the advantages of chutes and belt systems. For the first time, for example, rubber pieces can be removed from the material stream which is not the case with chute technology due to friction variation. VARISORT COMPACT with its open construction has the additional benefits over channelled chute systems of being easy to clean and much less prone to blockages caused by larger flakes and irregular shaped product
Even for irregular product or materials which have differing friction coefficients, the belt feeding system facilitates pinpoint ejection in free fall at the end of the feed belt, immediately after inspection. Following inspection, high-speed, precisely timed valves are activated to eject unwanted material from the main product flow into a separate zone for subsequent handling.
Customer Feedback
For Kornel Büsser, production manager at RecyPET AG, the long-standing
cooperation with Sesotec has proven its value: “The reliability and ease
of maintenance of the Sesotec units convinced us, together with their
performance, particularly in the separation of difficult contaminants.”
