在分析国内废旧塑料回收现状以及传统塑料回收工艺的基础上，遵循机械设计原理，设计出热风循环熔融废旧塑料回收造粒机，将废旧塑料经热风加热熔融后，再由单螺杆将熔融塑料挤出造粒。其中重点介绍了热风循环熔融塑料系统以及螺杆的几何参数设计。遵循结构设计方案，制造出热风循环熔融塑料回收造粒机的物理样机，并用该样机进行塑料回收试验，试验验证了热风熔融塑料回收的可行性和研究价值，同时针对试验过程中发现的问题提出了一系列解决方法，为后续的改进和进一步研究工作提供了可靠依据。%Based on the analysis of the domestic current situation of the waste plastics recycling and on the basis of traditional plastic recycling technology,following the principleof mechanical design,a molten waste plastic recycling granulator with hot air circulation was designed. The waste plastic was heated and melted by the hot air,and then the molten plastic was extruded and granulated by a single screw. The hot air circulation system and geometric parameters design of the screw were focused on. Follow-ing the structure design project,the physical prototype of hot air circulation molten plastic recycling granulator was produced,and a test of plastic recycling with the prototype was conducted. The test verified the feasibility and research value of hot air molten plastic recycling. At the same time,a series of solutions to the problems found in the test were put forward,which provides the reliable basis for the subsequent improvement work and further research.
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