Granular Support Compaction for Stronger 3D Printed Layer Bonding
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Solution Overview
Problem
Components manufactured via additive manufacturing often have reduced structural strength due to incompletely bonded layers, voids, and manufacturing-induced defects, limiting their use in structural applications.
Innovation Solution
A method involving the use of a compaction vessel with a granular support medium and heat to fuse planar or deposition layers of components, applying a compaction force to enhance interlayer bonding and heal defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If additive manufacturing is used to fabricate components, then manufacturing time is reduced and material waste is eliminated, but structural strength is compromised due to incompletely bonded layers and voids
Solution Approach 1:
The patent applies heat and pressure parameters to the additively manufactured component to transform its physical state. Heating to elevated temperatures softens the material, allowing layers to flow and bond together, while applied pressure forces intimate contact between layers, eliminating voids and strengthening interlayer bonds.
Solution Approach 2:
The patent utilizes phase transition of the printing material from solid to softened/melted state during heating, then back to solid upon cooling. This phase change enables the material to flow and fuse layers together under pressure, then solidify to maintain the strengthened structure.
2Ease of manufacture
If additive manufacturing is used to fabricate components, then tooling requirements are eliminated, but manufacturing defects such as voids and incomplete bonding occur
Solution Approach 1:
The patent introduces heat and pressure as intermediary agents that mediate between the deposited layers. These intermediaries facilitate bonding by softening material and forcing layers into intimate contact, compensating for the poor bonding inherent in the additive manufacturing process itself.
Solution Approach 2:
The patent replaces the mechanical layer-by-layer deposition system with a thermal-mechanical fusion system. Instead of relying solely on the precision of the printing head to create bonds, the system uses heat and pressure to create bonds, substituting mechanical precision requirements with thermal-mechanical processing.
3Shape
If components are stamped or cut from sheet materials and assembled, then complex geometries can be formed, but assembly complexity and time increase
Solution Approach 1:
The patent merges multiple planar or curved sheets into a single integrated three-dimensional component through heat and pressure fusion. Instead of assembling separate stamped parts, the process combines them into one monolithic structure, eliminating assembly steps while maintaining geometric complexity.
Solution Approach 2:
The patent transitions from two-dimensional sheet assembly to three-dimensional integrated structure. By applying heat and pressure, flat or curved sheets are fused into a volumetric form, adding the third dimension and creating complex geometries that cannot be achieved through simple planar assembly.
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 method significantly improves the structural strength and interlayer bonding of components, eliminating voids and defects, enabling the formation of complex geometries without tooling and reducing material waste.
Implementation Method 1
applying heat to the granular support and the first component within the compaction vessel
Implementation Method 2
the temperature within the compaction vessel is increased to or above the melting point of a material from which the first component is formed
Implementation Method 3
applying a compaction force in a first axial direction to the compaction vessel containing the first component and the granular support medium
Implementation Method 4
a combination of the compaction force and heat applied are sufficient to fuse one or more of the planar or deposition layers of the first component together
Data Source
AI summary
Disclosed herein is a method of fabrication used in conjunction with simplified fabrication process such as sheet cutting or additive material manufacturing which can cure many deficiencies of laminar bonding or assembly processes including curing of micro-voids or delamination between layers of a component, as well as enabling the combination of components to form a more complex assembly. This method includes the steps of: providing a first component having been formed of a plurality of planar layers; providing a compaction vessel; providing a granular support medium to the interior of the compaction vessel; placing the first component into the granular support medium within the compaction vessel so as to fully encompass the first component or component assembly; heating the granular support and the primary component within the compaction vessel; and applying a compaction force so as to bond or re-fuse the planar layers together.