Plastic recycling lines Tandem

The TANDEM technology applied to the recycling of heavily printed, contaminated and high humidity plastic materials guarantees the excellent quality of the granule with a notable energy savings in comparison with conventional recycling systems that foresee the re-extrusion of the material.

The plant is composed of a COMPAC unit and two extruders arranged in succession.
The short, non-vented primary extruder and the larger diameter secondary extruder allow for a reduction of the cutting forces (“shear rate”) and stress less the melted material.

Distinctive characteristics:

– Line suitable for the recycling for heavily printed, high humidity and contaminated materials.
– High performance degassing chamber for removal of up to 10 times more gas and humidity in the melted material compared to other systems.
– Possibility to have double filtration.
– Possibility to have the first extruder as a single screw and the second a twin screw.

LINE	PRODUCTION CAPACITY (Kg/h)*	ENERGY CONSUMPTION (KWh/Kg)*
GM90	250 ÷ 500	0.30 ÷ 0.40
GM105	400 ÷ 680	0.30 ÷ 0.40
GM125	600 ÷ 950	0.30 ÷ 0.40
GM160	1000 ÷ 1400	0.30 ÷ 0.40
GM180	1500 ÷ 2000	0.30 ÷ 0.40
GM210	2000 ÷ 2800	0.30 ÷ 0.40

* The capacity refers to LDPE, and can vary depending on the density of the material, degree of pollution, print and humidity percentage.

Tandem PLUS lines to give more “added” value to waste materials

Tandem PLUS line allows to have all the advantages of the classic TANDEM plus the possibility to improve the characteristics of material during the upcycling process. This solution is ideal for the production of compounds for special applications.
The Tandem PLUS line provides the combination of the first extruder as a single screw and the second a twin screw.
The regeneration and “upcycling” process begins with gravimetric dosing system to feed the materials in a more precise and accurate way to the COMPAC unit which has the function of shredding and densifying the waste material to be recycled. From the COMPAC unit, the material is pushed with constant flow from the feeding screw into the first extruder.
Connected to the first extruder there is a self-cleaning screen changer, installed to remove the contaminants present in the melted polymer. At the exit of the screen changer, the melt is “degassed” by the high performance vacuum chamber to avoid defects in the granules such as “air bubbles”.
The patented Gamma Meccanica high performance vacuum system allows for removal of up to 10 times more gas and humidity in the melted material compared to other systems. The polymer is “enriched” with master, carbonate and various additives inside the twin-screw extruder. The upcycling process ends with the cutting of the melted material inside the TDA or TI pelletizer systems.

Advantages of the lines

ECOTRONIC System

The ECOTRONIC system created by Gamma Meccanica, applied to the cutter-compactor, optimizes the speed of the cutter-compactor in order to maintain the requested temperature without the use of water.

Feeding screw

It pushes the material (especially low bulk density) into the extrusion screw. The screw speed is automatically adjusted to keep constant the extruder production.

High performance degassing chamber

Here the surface of material exposed to vacuum is 10 times greater than the exposure of a normal extruder, guaranteeing the extraction of large quantities of gas and contaminants.

Double filtration

Possibility to have double filtration

Watch the video

ALL PLASTICS RECYCLING SYSTEMS