3D Printing Small Geometric Offsets Surface Characteristics
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Solution Overview
Problem
Current fused-deposition 3D printing techniques struggle to produce desired surface characteristics such as colors, image resolutions, and textures due to the inability to quickly start and stop the flow of melted filament, leading to significant geometric artifacts and increased printing time.
Innovation Solution
The techniques involve using small geometric offsets at the outer bounds of printing layers, allowing for the creation of desired surface characteristics using a single filament head or multiple heads with different filaments, reducing filament head switches and artifacts, and enabling faster printing speeds by applying filaments in waves with varying amplitudes and phases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If fused-deposition printers use multiple filament heads with different colors to produce desired surface characteristics, then color variety and image resolution are improved, but the number of filament head switches increases dramatically, causing increased printing time and geometric artifacts
Solution Approach 1:
The patent segments the surface characteristics into alternating layers, where even layers use one filament color and odd layers use another filament color. This segmentation allows the printer to maintain a single filament head for most of the printing process, switching filaments only at layer boundaries rather than continuously, thereby reducing printing time while maintaining surface quality
Solution Approach 2:
The patent implements periodic filament switching based on layer number parity (even/odd layers). By making filament head switches periodic rather than continuous, the system achieves desired surface characteristics with minimal interruptions, resolving the contradiction between surface quality and printing time
2Manufacturing precision
If fused-deposition printers quickly start and stop filament flow to apply short segments, then surface characteristics are improved, but geometric artifacts increase due to inability to quickly start and stop
Solution Approach 1:
The patent maintains continuous filament flow by alternating between two filament heads in a coordinated manner. Instead of frequently starting and stopping filament flow to apply short segments, the system keeps the filament flow continuous by switching between heads, thereby eliminating geometric artifacts while maintaining surface characteristics
3Adaptability or versatility
If fused-deposition printers switch back and forth between multiple print heads to produce different colors, then color variety is improved, but total printing time dramatically increases
Solution Approach 1:
The patent segments the printing process into alternating layers with different filament colors. By organizing colors in alternating even/odd layers, the printer can use a single filament head for extended periods, switching only at layer boundaries. This segmentation strategy maintains color variety while dramatically reducing the frequency of filament head switches and increasing printing speed
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 enables the creation of 3D objects with desired surface characteristics, including colors and images, using fewer filament head switches, reducing artifacts, and increasing printing speed, even with basic 3D printers, and achieving high image resolution and color grading.
Implementation Method 1
In the case of fused deposition modeling, layers of material, such as sugar, plastic, or metal, are extruded, often in the form of small beads that make up strings, also called 'filaments.' Through extruding layer after layer of these filaments a 3D object is created.
Implementation Method 2
These techniques involve using small geometric offsets at the outer bounds of printing layers, allowing for the creation of desired surface characteristics using a single filament head or multiple heads with different filaments
Data Source
AI summary
This document describes techniques and apparatuses for 3D printing with small geometric offsets to affect surface characteristics. These techniques are capable of enabling fused-deposition printers to create 3D objects having desired surface characteristics, such as particular colors, images and image resolutions, textures, and luminosities. In some cases, the techniques do so using a single filament head with a single filament material. In some other cases, the techniques do so using multiple heads each with different filaments, though the techniques can forgo many switches between these heads. Each printing layer may use even a single filament from one head, thereby enabling surface characteristics while reducing starts and stops for filaments heads, which enables fewer artifacts or increases printing speed.