Advancing fused deposition modelling

推进熔融沉积建模

• 批准号: RGPIN-2017-06282
• 负责人: Frei, Hanspeter
• 金额: $ 1.6万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=638468
• 关键词: Advancing; fused; deposition; modelling

The over goal of this research is to develop a manufacturing strategy that allows to cost-effectively design and produce patient specific plastic implants for musculoskeletal conditions within a hospital. Conventional manufacturing poses too many design restrictions and would not be cost-effective for this purpose and therefore our research focuses on 3D printing. Several 3D printing technologies exist but due to its simplicity material extrusion 3D printing is an attractive technology. Here, a plastic filament is supplied to an extrusion nozzle which is heated to a semi-liquid state. The semi-molten plastic is then extruded through the nozzle and laid down in layers. The position of the nozzle is controlled with a numerically controlled mechanism that follows the shape of the desired part. The simplicity of this manufacturing technology makes it very accessible and allows to print a wide variety of plastics in an office setting. However, this 3D printing technology has been developed to create prototypes and not functional parts and therefore has several limitations. Therefore, our short term goal is to investigate and enhance this plastic extrusion based 3D printing technology to ensure that strong and reliable implants and other plastic parts can be manufactured. In addition to extensive material testing, we will generate numerical models, which allow to predict the long term performance and strength of the printed implants and parts to ensure safety and reliability. With an innovative approach we will enhance the printing process and address some of its limitations, which will further increase reliability and strength of the printed implants and parts. We will also include continuous carbon fiber into the printing process resulting in very stiff and strong parts that can be used in many other industries, including aerospace.

这项研究的目标是开发一种制造策略，允许以成本效益的方式设计和生产针对患者的特定塑料植入物，用于医院内的肌肉骨骼疾病。传统制造有太多的设计限制，不符合成本效益，因此我们的研究集中在3D打印上。3D打印技术有几种，但由于其材料简单，挤压3D打印是一种有吸引力的技术。这里，塑料细丝被提供给被加热到半液态的挤出喷嘴。然后，半熔融的塑料通过喷嘴挤出并层层铺设。喷嘴的位置由一个跟随所需零件形状的数字控制机构控制。这种制造技术的简单性使其非常易于使用，并允许在办公室环境中打印各种塑料。然而，这种3D打印技术是为了创建原型而不是功能部件而开发的，因此有几个限制。因此，我们的短期目标是研究和提升这种基于塑料挤出的3D打印技术，以确保能够制造出坚固可靠的植入物和其他塑料部件。除了广泛的材料测试外，我们还将生成数值模型，以便预测打印植入物和部件的长期性能和强度，以确保安全和可靠。通过一种创新的方法，我们将改进印刷工艺并解决其一些局限性，这将进一步提高印刷植入物和部件的可靠性和强度。我们还将在印刷过程中加入连续碳纤维，从而产生非常坚硬和坚固的部件，这些部件可以用于许多其他行业，包括航空航天。