Vibrating Slide Applicator for Uniform Powder Distribution
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Solution Overview
Problem
Existing rapid prototyping methods using powdered materials face challenges with poorly free-flowing powders, leading to defects such as grooves, waves, and cracks due to inadequate layer application, and the addition of additives to improve flowability can be undesirable, especially for fine powders.
Innovation Solution
A device with a slide applicator having a non-continuous edge design with recesses, allowing for perpendicular movement to ensure even powder distribution across the construction platform, reducing the need for additives and enhancing the application of poorly free-flowing powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If additives are added to improve powder flowability, then the flowability is improved, but the three-dimensional objects contain unwanted additives and exhibit increased warpage
Solution Approach 1:
The invention extracts and removes the harmful element (additives) from the system by using a vibration-assisted powder application device that enables poor-flowing pure powders to be applied uniformly without requiring flowability-enhancing additives, thus eliminating warpage and quality issues
Solution Approach 2:
The invention introduces dynamic vibration to the powder application process, where the application device is vibrated in the direction perpendicular to the construction field level, dynamically improving powder flow and distribution without altering the powder composition with additives
2Manufacturing precision
If very fine powders are used to increase surface quality, then the surface quality is improved, but the powders become poorly free-flowing and difficult to apply
Solution Approach 1:
The invention applies vibration in the vertical direction to fine powders during application, dynamically overcoming their poor flowability and enabling uniform distribution of very fine powders that would otherwise be difficult to apply
Solution Approach 2:
The invention uses mechanical vibration of the application device perpendicular to the construction field level to enhance the flow and distribution of fine powders, allowing them to be applied uniformly without clumping or poor coverage
3Device complexity
If a continuous straight edge slide is used for powder application, then the device structure is simple, but poorly free-flowing powders are not evenly distributed
Solution Approach 1:
The invention transforms the static continuous straight edge slide into a dynamic vibrating device, where vibration in the vertical direction enables even distribution of poorly free-flowing powders while maintaining the simplicity of the continuous edge structure
Solution Approach 2:
The invention changes the operational parameter of the slide by introducing vibration frequency and amplitude, transforming it from a static powder applicator to a dynamic one that can handle poorly free-flowing powders effectively
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables the effective application of poorly free-flowing powders without additives, improving the quality of three-dimensional objects by ensuring uniform powder distribution and minimizing defects, while also allowing for the use of very fine powders that enhance surface quality and reduce warpage.
Implementation Method 1
In this process, plastic powders are selectively briefly exposed to a laser beam in a chamber, causing the powder particles hit by the laser beam to melt. The melted particles run into each other and quickly solidify again into a solid mass.
Implementation Method 2
The invention provides a device for the layered production of three-dimensional objects... wherein the device for applying a layer is designed as a slide, the edge facing the layer of a material that can be solidified by the action of electromagnetic radiation... can be moved perpendicular to the application direction and parallel to the construction field level.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
The present invention relates to a device for the layer-by-layer production of three-dimensional objects, a method for layer-by-layer production, and corresponding molded bodies.