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Peek plastic injection molding9/18/2023 ![]() ![]() The experimental results prove that the injection process of PEEK parts by photosensitive resin mould is feasible, and the PEEK parts with good mechanical properties and complex shape can be obtained quickly by this process.ĭifferential scanning calorimetry (DSC) experimental equipment was DSC200F3 differential scanning calorimeter the mould was made by Shaanxi Hengtong Intelligent Machine Co., Ltd., in SPR6000 photosensitive resin. The experimental results show that the strength of PEEK parts produced by this process meets all the mechanical properties’ requirements. Mechanical experiments were carried out on the samples with the best injection process parameters. Under these process parameters, the mechanical properties of PEEK parts are the best. The PEEK samples were injected, and nine groups of experiments were done the orthogonal experimental results were analysed by variance analysis, and the optimum injection process parameters were obtained. The finite element simulation experiment was done to evaluate the temperature change of resin mould during the injection process. The process for quickly printing a mould using a stereolithography technique to inject individualized PEEK parts through a thermosetting photosensitive resin mould was proposed in this study. Generally, the photocuring forming speed is fast, the photosensitive resin material used has thermosetting property, and the manufacturing precision can reach 0.1 mm or more. Individualized PEEK parts are injection-moulded with metal moulds, which have the disadvantages of high processing cost, serious material waste, low efficiency and cumbersome processes. Traditional injection moulding is suitable for high-volume, standardized PEEK parts manufacturing. The edges of PEEK parts manufactured by FDM are easy to warp and deform, and the mechanical properties of PEEK parts are difficult to meet the requirements of using parts. The flexural properties and interlaminar shear strength of PEEK moulded parts made by fused deposition modelling (FDM) forming technology are poor. The traditional mould costs are high, the production cycle is long, and the PEEK material is wasted during the machining process. Injection moulding needs to be matched with the corresponding mould design and manufacturing. The traditional PEEK processing methods mainly include injection moulding, machining and the like. The advantage of additive manufacturing (AM) technology is that it can quickly manufacture parts with complex structures and individual structures and has high material utilization. It has been widely used in aerospace, automobile and other fields. ![]() It has good high-temperature resistance, fatigue resistance, high strength and corrosion resistance. Polyether ether ketone (PEEK) is an inert polymer material with excellent properties. The injection method in this study greatly reduced the production cost of individualized PEEK parts and can obtain PEEK parts with good mechanical properties in a relatively fast time. Photosensitive resin mould has lower cost, shorter production cycle and no waste of PEEK material during injection process. The experimental results show that it is feasible to produce photosensitive resin mould to inject individualized PEEK parts by stereolithography. The results showed that the average tensile strength was 96.4 ± 2.28 MPa, the average bending strength was 147.654 ± 9.36 MPa, and the impact strength was higher than 10 kJ/m 2. Mechanical tests were carried out on PEEK samples injected by this process. The optimum parameters of PEEK injection process were obtained by orthogonal experiment: injection temperature 373 ☌, injection pressure 11 MPa and injection speed 70%. In simulation experiment, the temperature field of the PEEK injection mould was analysed by finite element analysis it was preliminarily determined that the resin mould will not be deformed during the injection process. In this study, photosensitive resin mould was made by stereolithography technology to inject individualized polyether ether ketone (PEEK) parts. ![]()
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