3D Printing Spray Forming Angled Surface Finish
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Solution Overview
Problem
Conventional 3D-printing methods, such as FDM, result in a stair-stepped effect on angled surfaces due to layer-by-layer deposition, requiring additional manufacturing steps like sanding or hand spray forming to achieve smoothness, which complicates the process, reduces accuracy, and increases costs.
Innovation Solution
Integrating spray forming into the 3D printing process, where a flexible, computer-controlled nozzle forms successive layers and smooths the surface by spraying material onto the intermediate structure, eliminating the need for separate finishing steps and ensuring the surface meets specified tolerances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If layer-by-layer deposition technique is used to 3-D print parts, then manufacturing capability is achieved, but stair-stepped effect occurs on angled surfaces resulting in poor surface finish
Solution Approach 1:
The patent combines two manufacturing processes (3-D printing and spray forming) into a single integrated system. The 3-D printer builds the intermediate structure layer-by-layer, then the spray forming head immediately smooths the surface in the same manufacturing cycle, eliminating the need for separate finishing operations and resolving the contradiction between manufacturing capability and surface finish quality
Solution Approach 2:
The spray forming process acts as an intermediary step between layer-by-layer deposition and final part completion. It mediates the stair-stepped effect by depositing additional material that fills in the gaps and smooths the surface, transforming the rough intermediate structure into a smooth final surface
2Manufacturing precision
If separate finishing steps like sanding or hand spray forming are used to eliminate stair-stepped effect, then surface smoothness is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges the 3-D printing process with spray forming into a single integrated system controlled by one computer. This combination eliminates separate finishing steps and reduces manufacturing complexity while maintaining surface smoothness, directly addressing the contradiction between surface quality and process complexity
Solution Approach 2:
The system performs self-service by automatically smoothing its own output. The spray forming head is controlled by the same computer that controls the 3-D printer, allowing the system to automatically detect and correct stair-stepped effects without requiring external finishing operations or additional manual intervention
3Manufacturing precision
If conventional 3-D printing followed by separate finishing steps is used, then surface quality is improved, but manufacturing time and productivity are reduced
Solution Approach 1:
The patent implements continuous useful action by performing both 3-D printing and spray forming in a single uninterrupted manufacturing cycle. The spray forming head follows the 3-D printing process continuously, smoothing surfaces as they are created, which eliminates idle time between printing and finishing operations and significantly improves manufacturing efficiency
Solution Approach 2:
The spray forming process performs preliminary smoothing action during the 3-D printing process itself, before the part is removed from the machine. This preliminary action prevents the need for subsequent finishing operations and maximizes productivity by completing surface quality improvement in the same manufacturing cycle
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
This approach allows for the direct creation of smooth, complex geometries without additional finishing, enhancing manufacturing efficiency and accuracy by eliminating stair-stepped effects in a single step, ensuring compliance with specifications.
Implementation Method 1
printing the structure based on the instructions, the printing comprising spray forming the material to produce the structure
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3C
AI summary
Techniques for 3-D printing parts using spray forming are disclosed. A 3-D printer receives instructions for printing a structure, where the instructions are based on a data model of the structure. The 3-D printer receives a suitable material such as a metal, plastic, or composite, and prints the structure based on the instructions using spray forming. In one embodiment, the 3-D printer employs spray forming to finish an angled surface of a 3-D printed part having a stair-stepped effect.