Leda plastic recycling Plastic recycling washing line 
 
Everybody hates agglomerators because of the simple fact it is a machine requiring high installed power and, since not long ago, one or more operators.
 
With the continuous agglomerator the energy per Kg. required is fairly low and the consumption is steady avoiding the peaks of standard batch machines.
 
The final result is a melted material that can be ground for further processing or sent directly to an extruder for pelletizing.

giorgio.mattiello@gmail.com

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 Continuous agglomerator

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When recycling plastics wastes from post-consumer collect and, especially, in the case of  LLDPE-LDPE-HDPE thin film foils and packaging material having a low specific weight and low density, it is advisable and necessary to increase the density and weight in order to process further the material in the extrusion or pulverizing phases.
There are cases when the material has a bulk density of 18-20 kg/cbm and to make them suitable for further process they should be turned to a minimum 350-400 kg/cbm.
During the density increasing phase, a fairly good amount of humidity must be removed specially when coming from the washing line.
To this purpose, agglomerators are used by recyclers.
This type of machine has reduced capacity when the thickness of the film, foils lowers (bigger volumes with low density) and the humidity on surface of the material at in-feed increases.
PURPOSE OF MELTING :
                  - Increase the bulk density of plastic waste from 20 kg/cbm up to a minimum of 400 kg/cbm.
                  - Reduce humidity on the plastic waste.
                  - Due to the big volumes of wastes at in-feed, have a big capacity of the in-feed hopper to enable the acceptance of huge volume of material shred or ground even by a twin-shaft shredder without sizing screen (i.e. not necessarily from a sharp cutting grinder open rotor type provided of screen).
- Low processing costs (i.e. low energy consumption, maintenance, staff).
 
TECHNOLOGY: twin screw counter-rotating melt plastifier
 
The in-feed shred material is fed very fast to the hopper of the melt plastifier by means of a dosing feed belt conveyor.
Based on the melt plastifier amps absorption, the feeding of the material is adjusted automatically.
The axle between the screws and the relative screws diameter allows a very wide feeding surface.
In fact, the material is taken in through the two counter-rotating screws and is undergoing a strong mechanic friction and heating up.
At the output of the extrusion short chamber the material temperature preset on the PLC is checked from the sensor that drives and controls the output valve.
The material is thus extruded through one or a set of holes as required from the further process. The holes cannot be blocked by the presence of any metal, wood or un-melted plastics eventually mixed up in the material.
The melted material can thus either feed a short extruder (homogeneous material) for pelletizing or it can be cooled down and further ground or cut (mixed wastes).
 
TECHNICAL DATA
 
      Type of machine                    COUNTER ROTATING TWIN SCREW
      Screw diameter                     600         mm
      Motor power                        395         kW
      Screw speed rotation           96         Rpm max
      Total power installed          450         kW
      Overall sizes                     Length     5800 mm
                                           Width       2500 mm
                                           Height      2000 mm
                                                 Weight    15000   kg