Case Studies

Feb 01, 2018 | Sesotec

Optical Sorting is the Core of the Recycling Cycle

Thermoplastkreislauf GmbH is headquartered in the Lower Austrian town of  Traiskirchen near Vienna. As a specialist in the field of thermoplast refining the company in its "Production" business unit produces individual plastic granulates by means of sophisticated compounding processes. The recycling of high-quality thermoplasts is the company's second business unit. The objective of this business unit is to process production waste into high-quality regrinds or regranulates.

All the products – new material, regrind, regranulate, and recyclate – undergo stringent quality inspection, and it is also of great importance here that products are of pure colour and correct form, and metal-free.


Sesotec sorting station with integrated multi-sensor sorting system

In its recycling business unit Thermoplastkreislauf GmbH installed a sorting station designed by Sesotec. Sesotec supplied a customised station with suitable steel construction, conveyor technology, and multi-sensor sorting system. The scope of delivery also included feeding hoppers, conveyor belts, steel construction for screens and working platform, and a suitable  SIEMENS control unit. For easy cleaning of the conveyor belts in case of material changes, mobile folding conveyors were integrated in the sorting station.

The core component of the sorting station is the VARISORT COMPACT multi-sensor sorting system that is equipped with sensors for colour and shape detection and with an all-metal sensor. The sorting station furthermore includes various screens that remove oversized and undersized particles before the material is transferred into the sorting system. The VARISORT COMPACT multi-sensor sorting system separates unwanted colours, shapes, and metals from the plastic flow and thus guarantees a constant high quality of the plastic recyclate. The unmixed products in additional steps are processed into granulate or are returned to the customer for further processing.

Says Christian Wind, managing director of Thermoplastkreislauf GmbH: "The project was perfectly planned and smoothly executed by Sesotec. We greatly benefit from the experience and flexibility of Sesotec in the field of sorting technology, because we can now guarantee that our products meet highest quality demands."


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