Powder Bed 3D Printing With Thermal Control for Support-Free Builds
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Solution Overview
Problem
Current 3D printing methods face challenges in minimizing deformation and auxiliary support removal during the printing process, particularly in achieving precise control over energy application and thermal management to ensure accurate and efficient formation of three-dimensional objects.
Innovation Solution
A method involving the sequential application of powder layers in a powder bed, where an energy beam transforms and solidifies the material, with controlled thermal energy removal to manage temperature and prevent deformation, allowing for the formation of three-dimensional objects without auxiliary supports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If auxiliary supports are inserted to prevent deformation during 3D printing, then the object maintains structural stability, but the device complexity and post-processing requirements increase
Solution Approach 1:
The patent enables the printed object to support itself during the printing process through controlled thermal management and sequential layer formation, eliminating the need for auxiliary support structures. The system uses precise temperature control and energy beam parameters to ensure each layer solidifies properly before the next is added, allowing the object to be self-supporting throughout construction.
2Productivity
If energy beam parameters are increased to improve material transformation, then the transformation speed increases, but thermal deformation and warping worsen
Solution Approach 1:
The patent employs periodic or pulsed energy beam application with controlled duty cycles, alternating between high-power transformation phases and lower-power cooling phases. This periodic action allows the material to transform at high speed during active beam periods while dissipating excess heat during idle periods, preventing thermal accumulation that causes deformation and maintaining dimensional accuracy.
Solution Approach 2:
Instead of simply increasing energy beam parameters to accelerate transformation, the patent inverts the approach by using controlled energy reduction and thermal management strategies. The system deliberately modulates energy input, using lower average power with precise pulsed delivery to achieve both high transformation speed and minimal thermal deformation, rather than continuously high power that would cause warping.
3Temperature
If thermal energy removal is increased to prevent deformation, then the temperature control improves, but the energy management complexity increases
Solution Approach 1:
The patent combines the heating and cooling functions into a single integrated energy beam system. The same energy beam used to transform and heat the material is also used to remove thermal energy through controlled modulation, eliminating the need for separate heating and cooling systems. This merging simplifies the overall energy management architecture while maintaining precise temperature control.
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 precise formation of three-dimensional objects with reduced deformation and efficient energy management, resulting in objects with improved structural integrity and surface quality.
Implementation Method 1
transforming at least a portion of the powder material in the second layer to form a transformed material, wherein the transforming is with the aid of an energy beam having a first energy per unit area (S1)
Implementation Method 2
removing energy from the second layer at a time interval from t2 to a third time (t3), wherein the thermal energy is removed along a direction that is different from below the first layer of powder material
Implementation Method 3
upon removal of the energy, the transformed material solidifies to form at least a part of the three dimensional object
Data Source
AI summary
The present disclosure provides three-dimensional (3D) objects, 3D printing processes, as well as methods, apparatuses and systems for the production of a 3D object. Methods, apparatuses and systems of the present disclosure may reduce or eliminate the need for auxiliary supports. The present disclosure provides three dimensional (3D) objects printed utilizing the printing processes, methods, apparatuses and systems described herein.