Study on Reuse Techniques of Hot Air Melting of Waste Plastics

doi:10.19491/j.issn.1001-9278.2021.08.027

Abstract

Abstract:

This paper proposed a hot air melting method for the reuse of waste plastics. With this method， the waste plastics was melted directly in the hot air and then extruded and palletized. There is no crashing needed in the whole process， generating no noise and dust accordingly. The temperature of hot air can be controlled easily， and therefore the degradation caused by overheating can be avoided. The waste heat can be reused through hot air recycling. Based the theoretical analysis， an experimental prototype was designed and manufactured， following by conducting a validation experiment.

Key words: reuse, extrusion granulating, hot air melting, waste plastics

CLC Number:

TQ 319

HUANG Xingyuan, PAN Liuwen, TAN Lei, WANG Han. Study on Reuse Techniques of Hot Air Melting of Waste Plastics[J]. China Plastics, 2021, 35(8): 195-199.

Figures/Tables 11

Fig.1. Schematic diagram of hot air melting plastic recycling granulators

Fig.2. Schematic diagram of hot air circulation systems

Fig.3. Mixing device diagram

Fig.4. Schematic diagram of stirring sheet function

Fig.5. The process of separating the melt film on the surface of the waste plastic

Fig.6. Screw extrusion mechanism

Fig.7. Schematic diagram of cutting mechanism

Fig.8. Experimental material （PP）

Fig.9. Extrusion of molten waste plastics without mouth model

Fig.10. Extruded molten waste plastic with mouth model

Fig.11. Experiment with molten plastic extrusion and pelletizing

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