高分辨率立体石版:通过控制流体力学来实现负空间
Ian A Coates1, William Pan2, Max A Saccone1,3
1Department of Chemical Engineering, Stanford University, Stanford, CA 94305.
概括
注射连续液体接口生产可以防止3D打印中的过硬. 这种先进的立体石刻技术可以分辨50μm微通道,使复杂的微流体设备制造成为可能.
科学领域:
- 添加剂制造 添加剂制造 添加剂制造
- 聚合物科学 聚合物科学
- 微型制造业的微型制造
背景情况:
- 立体石刻法 (SLA) 是一种3D打印方法,使用光诱导聚合来创建自由形式结构.
- 过度硬化,由于紫外线剂量积累而导致负空间的意外关闭,限制了SLA的分辨率,特别是在微流体通道中.
- 现有的SLA方法在制造复杂的结构时,难以保持Z轴分辨率.
研究的目的:
- 引入一种新的方法,以减轻立体石刻技术中的过度硬化.
- 为了提高3D打印对象中负空间 (如微通道) 的分辨率.
- 为了提高设计自由在制造3D自由形式的微流体设备.
主要方法:
- 使用注射连续液体接口生产 (CLIP) 连续在负空间中取代树脂.
- 使用新鲜树脂来取代在之前创建的层中存在过度硬化风险的树脂.
- 专注于在3D打印过程中减轻Z轴分辨率损失.
主要成果:
- 成功解决了50μm微通道,克服了先前与树脂特性与负空间分辨率有关的限制.
- 证明了制造高准确度的3D自由形式微流体设备的能力.
- 在材料选择和设备属性方面实现了更好的设计灵活性.
结论:
- 注射CLIP有效地防止通过连续的树脂位移在立体石刻中过度固化.
- 这种技术显著提高了微尺度特征的3D打印的分辨率能力.
- 允许创建先进的3D微流体设备,具有更大的设计自由和材料选择.
相关概念视频
01:05Fluid Pressure over Flat Plate of Constant Width
When a body is submerged in water, it experiences fluid pressure acting normal on its surface and distributed over its area. For better design structures, it is crucial to determine the magnitude and location of the resultant force acting on the surface. In the case of a rectangular plate of constant width submerged in water, the pressure increases with depth, resulting in a linearly varying trapezoidal pressure distribution from the upper to the lower edge of the plate.
The resultant force...
The resultant force...
01:12Fluid Pressure over Curved Plate of Constant Width
When a curved plate of constant width is submerged in a liquid, the pressure acting normal to the plate varies continuously both in magnitude and direction. Calculating the magnitude and location of the resultant force at a point is often challenging for such cases. One of the methods to determine the resultant force and its location involves separately calculating the horizontal and vertical components of the resultant force. This complex calculation can be simplified by representing the...
01:02Fluid Pressure over Flat Plate of Variable Width
When a flat plate is submerged in a fluid, the fluid exerts pressure on the plate. This pressure can lead to many different phenomena, including drag and buoyancy. To understand the behavior of the fluid over a flat plate of variable width, it is essential to analyze the distribution of the pressure exerted.
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
The pressure distribution on the plate can be calculated by determining the force that acts on a differential area strip of the plate. Thus, the magnitude of the force is equal to the...
01:17Steady, Laminar Flow Between Parallel Plates
Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
01:30Typical Model Studies
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
01:30Applications of Integration to Find Hydrostatic Pressure
Hydrostatic force is a fluid's total force at rest on a surface. For a horizontal surface submerged at a fixed depth, the pressure is constant and calculated as the product of fluid density, gravitational acceleration, and depth. In the case of a vertical dam wall submerged in water, this force is not evenly distributed due to the increasing pressure with depth. This variation arises from the cumulative weight of the water above each point. Integration is used to account for the continuous...