EXPERIMENTAL STUDY OF CRUSHED POLYMER WASTE USED AS INITIAL RAW MATERIAL FOR THE SCREW EXTRUDER OF A 3D PRINTER

Abstract

Polymeric waste generated in the process of manufacturing finished products using 3D printing is described. Factors
that influence the choice of a plastic processing method are considered. The distribution of bulk materials by particle size is
given. The use of mechanical grinding of polymer waste as the most common method is substantiated. Physical effects used in
different types of shredders are described. Types of equipment for mechanical destruction of various materials are given. A
shredder for shredding polymer waste generated in the process of 3D printing is selected, its technical characteristics are given
and the principle of operation is described. Shredding of polymer materials, namely ABS, PLA, TPU plastics using a shredder,
was carried out. Sieve analysis of crushed polymeric materials was carried out. Distribution curves of crushed polymer particles
were constructed. Graphs of the dependence of crushed plastic particles on the average particle size of different fractions were
constructed. Regression dependences of the bulk density depending on the average particle size of polymer materials were
obtained. The density of the monofilament made using a 3D printer with a screw extruder, which prints with crushed particles
obtained in the process of grinding using a shredder, was determined.