Multi-Printhead 3D Printing for Removable Sintering Supports
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Solution Overview
Problem
The challenge in 3D inkjet printing is developing support materials that provide functional support during printing without causing cross-contamination and can be easily removed, while maintaining the integrity of the printed part, especially in the transition from a green to a fully sintered state.
Innovation Solution
A system with multiple print heads and a processor that regulates the distribution of materials with different particle sizes and sintering characteristics, allowing for the simultaneous printing of a product structure and a support structure with the support material sintering at a higher temperature than the object material, enabling easy removal after partial sintering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If support material is used to provide functional support during printing, then the printed part can be supported during printing or until the model reaches self-supporting stage, but the support material may cause cross-contamination and cannot be easily removed without affecting the integrity of the printed part
Solution Approach 1:
The support material is segmented into multiple removable sections or layers that can be detached individually as the printed part gains mechanical strength, minimizing cross-contamination and avoiding damage to the printed part during support removal
Solution Approach 2:
The support structure is designed with preliminary features such as self-release mechanisms or pre-defined separation interfaces that enable easy removal once the printed part reaches adequate mechanical strength, preventing cross-contamination before it occurs
2Ease of manufacture
If support material is removed during post-printing process before the model reaches self-supporting stage, then the support can be removed, but the removal process may affect the integrity of the printed part
Solution Approach 1:
The support structure incorporates preliminary release features or self-detaching mechanisms designed in advance, allowing support removal to occur automatically or easily once the printed part achieves adequate mechanical strength, eliminating the need for manual removal that could compromise part integrity
Solution Approach 2:
The support material is designed as a temporary, disposable structure that is intentionally made easy to remove or degrade after serving its support function, using materials or designs that sacrifice the support structure without harming the final printed part
3Adaptability or versatility
If different particle sizes are used for model and support materials, then the sintering characteristics can be controlled to enable selective sintering, but the material compatibility and processing complexity increase
Solution Approach 1:
The particle size parameter of support material is deliberately changed to be larger than model material particles, creating distinct sintering characteristics that enable selective sintering of model material at lower temperatures while support material remains unsintered and easily removable
Solution Approach 2:
The system uses composite material strategy by combining model material and support material with different particle sizes and sintering properties in the same printing process, allowing differential processing where model material sinters while support material remains removable
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 ensures the integrity of the printed part by controlling shrinkage and minimizing cross-contamination, facilitating the removal of the support structure without damaging the object, thus enhancing the mechanical properties of the final product.
Implementation Method 1
a first material having a first average particle size, wherein the first average particle size is chosen to impart a first sintering characteristic... a second material having a second average particle size, wherein the second average particle size is chosen to impart a second sintering characteristic
Data Source
Figure 1
Figure 2A~2F
Figure 3
AI summary
A system for forming a product with different size particles is disclosed. The system comprises at least one print head region configured to retain a first group of print heads configurable to additively print at least a first portion of the product with a first material and a second group of print heads configurable to additively print at least a second portion of the product with a second material. The described system may also comprise a processor configured to regulate the first group of print heads and the second group of print heads to distribute the first material and the second material. A method of making an object by ink jet printing using the disclosed system is also disclosed.