Matching Structural Optimization And Heat Transfer Simulation Based On Wood Plastic Extrusion 3D

With the gradual promotion of industrial automation,3D molding technology has been a great deal of attention.In recent ten years,countries have increased investion in the field of researse about 3D prototyping technology,colleges and universities all over the world serve 3D molding technology as a hot topic to study.Wood plastic material is a new kind of green environmental protection material,which has been widely used in all walks of life.In this paper,a new forming method of wood plastic composites-3D extrusion molding technology.By consulting the relevant literature,in this paper,the structural design of wood plastic 3D extrusion was studied,and numerical simulation of heat transfer in structures and parts,specific research contents include the following aspects:(1)Access to a large number of relevant literature,to 3D printing technology and wood plastic materials to make an overall description,including current 3D molding characteristics,molding material,development status of domestic and international and the development background of WPC,molding process and research progress at home and abroad etc.More common 3D molding technology has SLS,SLA and FDM,this paper mainly studies the FDM forming technology.(2)The theoretical analysis of the heat transfer of the wood plastic 3D forming temperature field was studied,establishment of physical and mathematical model of heat transfer,temperature field solving method and boundary conditions,numerical solution method of 3D forming fluid etc.(3)To make an overall design and optimization of the 3D extrusion extrusion special head.In order to improve the efficiency and precision of forming,innovative design of the nozzle can be achieved by changing the extrmsion parameters of the adaptive changes in the nozzle diameter,using FULENT to simulate the heat transfer of a suitable variable diameter nozzle,under meet the molding conditions to predict the appropriate nozzle size and the location of temperature infliction.(4)Using Workbench Fluent to simulate the extrusion process of WPC materials,got pressure distribution and velocity distribution,laid the foundation for 3D extrusion molding theory.Under the method of variable diameter extrusion,the temperature distribution of heat transfer is simulated,in the process of material cooling,the welding property of forming units,the distribution of thermal stress caused by different forming conditions is analyzed.(5)The flow rate measurement and extrusion experiments were carried out,test verified effect of molding temperature on material flow and forming material unit indirect surface reasonable temperature range.