Heated Air System for 3D Printer Thermal Management
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Solution Overview
Problem
Fused deposition modeling 3D printers face challenges in efficiently regulating the thermal environment of the build chamber due to power limitations, leading to thermal stresses and material deformation during the additive manufacturing process.
Innovation Solution
The method involves providing heated air at a selected temperature across the horizontal build plane in a 3D printer, using a chamber with air intake and exhaust systems that recirculate and reheate the air to maintain a uniform temperature profile, minimizing power consumption and preventing part deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heated air is provided to the build chamber to maintain temperature, then thermal stresses and material deformation are reduced, but power consumption increases
Solution Approach 1:
The patent applies local heating by positioning the heating element to provide heated air directly at the build plane where material is deposited. This localized approach maintains temperature stability at the critical build zone while minimizing power consumption compared to heating the entire chamber uniformly.
Solution Approach 2:
The system pre-heats air before it reaches the build plane, ensuring that material deposits on a pre-warmed surface. This preliminary heating action prevents thermal shock and deformation while using less energy than continuous chamber heating.
2Manufacturing precision
If heated air is provided at the build plane to maintain material temperature, then material adhesion improves, but thermal expansion and contraction issues arise
Solution Approach 1:
The heating element is positioned to provide localized heat at the build plane, ensuring material adhesion where deposition occurs while allowing the bulk material and chamber to maintain a more stable thermal environment, reducing thermal expansion and contraction issues.
Solution Approach 2:
The system dynamically controls heating to match the deposition process, providing heat only when and where material is being deposited. This dynamic approach maintains adhesion during deposition while preventing excessive thermal buildup that would cause expansion and contraction.
3Reliability
If uniform heating is applied throughout the chamber, then thermal stresses are minimized, but power consumption and cooling requirements increase
Solution Approach 1:
Instead of uniform heating throughout the chamber, the patent applies heating locally at the build plane where it is most needed. This reduces the total energy required for heating and minimizes the cooling load, as only the deposited material needs temperature control, not the entire chamber volume.
Solution Approach 2:
The patent extracts the heating function from the general chamber environment and concentrates it at the specific location (build plane) where thermal control is critical. This separation allows efficient thermal management with reduced power consumption.
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 efficient heat distribution and solidification of the build material, reducing thermal stresses and deformation while adhering to power limitations, allowing for the production of high-quality 3D parts without additional heating or cooling needs.
Implementation Method 1
a heating element positioned within the chamber and positioned below the build plane such that the heating element heats the air in the chamber
Implementation Method 2
a blower positioned within the chamber and above the build plane such that the blower circulates the heated air across the build plane
Data Source
AI summary
An apparatus and a method using the apparatus provides heated air in an additive manufacturing process for building a three-dimensional part. The method comprises providing a stream of flowable part material at an initial build level, the initial build level being positioned in and defining a horizontal plane wherein the stream of flowable material is being initially disposed on previously deposited part material. Heated air is provided at a selected temperature corresponding to the temperature of the stream of flowable part material such that the stream of flowable part material deposits on previously deposited part material in an adhering fashion thereby forming the three-dimensional part wherein the heated air is provided in the horizontal plane of the initial build level.