Experimental Study On 3D Printing Of Polyethersulfone And Its Continuous Basalt Fiber Reinforced Composite

FDM 3D printing technology can produce the designed prototype parts in a short time.The ultra-high manufacturing efficiency of FDM 3D printing technology has been rapidly developed and applied in the background of industrial manufacturing with increasingly fierce product competition.However,because FDM 3D printing technology has more stringent requirements for consumables,the limitations of printing consumables have been one of the biggest obstacles to the further development and application of FDM 3D printing technology.In addition,with the continuous development of FDM technology,in order to meet the application requirements in more construction machinery fields,FDM printing functional parts with high strength,high temperature resistance and excellent wear resistance are urgently needed.In this paper,high performance special engineering plastics polyethersulfone(PES)and its basalt fiber reinforced composites were used in FDM taking the application of 3D printing technology as the main research line,through the research on the preparation and performance test of polyethersulfone wire,the selection of the optimal polyethersulfone3 D printing temperature,the optimization of polyethersulfone 3D printing process parameters,the 3D printing method and performance test of basalt fiber reinforced polyethersulfone composites,the melting sedimentation of polyethersulfone and basalt fiber reinforced composites with high molding quality was successfully realized.Through the research of this paper,on the one hand,it can break through the limitations of traditional manufacturing methods of PES,and meet the needs of complex parts with high strength,wear resistance and high temperature resistance in more construction machinery applications.On the other hand,it can make up for the blank of PES in the field of FDM 3D printing technology and broaden the scope of FDM the selection of3 D printing materials is of great significance to promote the further development and application of FDM technology.The main contents of this paper are as follows:The feasibility of PES material used in fused deposition 3D printing was studied.The thermal properties of PES particles were determined by X-ray diffraction(XRD)and differential scanning calorimetry(DSC);PES 3D printing wire was successfully prepared by twin-screw extruder,and its diameter dimension accuracy,tensile strength and water absorption were tested to determine that the prepared wire can meet the needs of FDM 3D printing,and the drying parameters before printing were determined to ensure the molding quality of the printed parts.The printing accuracy of 3D printing device is tested,and it is confirmed that the device can meet the needs of PES 3D printing.The primary and secondary relationship and optimal combination of PES optimal printing temperature and main printing process parameters on the mechanical strength of the printed parts were determined.The influence of different printing temperature on the tensile strength of PES printing sample was studied by single factor experiment,and the bonding mechanism between FDM tow was analyzed.The bonding and fusion of the tow in PES printing sample under different printing temperature was analyzed by scanning electron microscope,and the optimal printing temperature of PES was finally determined.The influence of main printing parameters on the mechanical strength of PES 3D printing sample was studied and analyzed by using orthogonal experiment method,and the primary and secondary order and optimal combination of printing parameters on the tensile strength and bending strength of PES 3D printing sample were obtained by using range analysis method.3D printing of continuous basalt fiber reinforced polyethersulfone composites was successfully realized.The 3D printing device of basalt fiber reinforced PES composite was built,and the designed parts were successfully printed;the mechanical properties and friction and wear properties of basalt fiber reinforced PES composite FDM parts were studied and analyzed;the fiber reinforcement mechanism and fiber resin interface bonding mechanism and influencing factors were analyzed,and the mechanical properties of FDM parts were treated by silane coupling agent and ultrasonic reinforcement methods to further improve the tensile strength of basalt fiber reinforced PES composite 3D printing specimen.