APP – Preparing parts

Before being shredded, parts and items should be :

  • cleaned
  • pre-chopped (if there dimensions are too big)

1. What needs to be cleaned ?

The regrind you will feed in the extruder needs to be free of any :

  • glue
  • dust
  • foreign plastics
  • grease
  • any other impurities in general (solid or liquid)

2. How to clean the parts ?

There are several methods to clean plastic parts :

  • Removing the glue with acetone or an other solvent, but being careful it does not dissolve the parts themselves.
  • Rinsing the parts thoroughly with soapy water and then clear running water
  • Plunging the parts in a water bath
  • Blowing the dust away with compressed air
  • Other

This is a very interesting step in the recycling process. Indeed, it is crucial, but most researchers have not yet found the optimal method.

This is a topic of interest for the Materials Team at 3devo.

3. Why pre-cutting the parts ?

The hopper of the Shr3d It has an opening of approximately 7cm.

Obviously, parts should be smaller than this in order to be shredded.

It is difficult to define the ideal shape and dimensions for parts to be shredded. The shredding of one given part can be more or less easy, depending on :

  • the stiffness of the material
  • the number of parts you are trying to feed in at the same time
  • the size and shape of the part and of other parts around that part

Here, the term ‘easy’ means that the user can shred a large amount of plastic, fast. In other terms, easy shredding refers to a high throughput.

Generally speaking, smaller parts (<3cm in all directions) can be shredded faster, for they fall more easily down the hopper and into the throat. [/av_textblock] [/av_one_full]