Sacrificial Objects for 3D Printing Thermal Uniformity
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Solution Overview
Problem
3D printing technologies face challenges in maintaining uniform temperature distribution during the printing process, leading to warpage issues in larger parts due to non-uniform thermal stress, which affects the dimensional accuracy of final objects.
Innovation Solution
The implementation of sacrificial objects strategically placed near the target object in the build bed to provide dynamic heating and enhance temperature uniformity, using a system that includes a target engine, thermal engine, and sacrificial object engine to identify optimal locations for these objects based on the target model geometry and temperature data, employing finite element method simulations and simulated annealing operations to achieve temperature threshold coverage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If 3D printing is used to produce larger parts, then productivity and manufacturing capability are improved, but non-uniform temperature distribution causes warpage and dimensional inaccuracy
Solution Approach 1:
The patent introduces sacrificial objects with specific thermal properties at strategic locations within the build bed to create localized thermal zones. These sacrificial objects have different thermal characteristics than the target object, allowing them to emit thermal energy preferentially to cooler regions, thereby creating non-uniform heating patterns that compensate for expected cooling gradients in large parts.
Solution Approach 2:
Sacrificial objects serve as intermediary elements between the heat source and the target object. They absorb and redistribute thermal energy, acting as thermal mediators that smooth out temperature gradients. The sacrificial objects are positioned to intercept and redirect heat flow, preventing direct thermal stress concentration on the target object that would cause warpage.
2Manufacturing precision
If uniform temperature distribution is maintained across the build bed, then manufacturing precision is improved, but additional heating mechanisms increase device complexity
Solution Approach 1:
The sacrificial objects are designed to autonomously regulate their own temperature and thermal emission based on their material properties and positioning. They self-adjust their thermal contribution without requiring active control systems, sensors, or feedback mechanisms. The objects naturally emit thermal energy to their surroundings based on their temperature differential with the environment, providing passive thermal compensation.
Solution Approach 2:
The patent modifies the thermal parameters of the printing system by introducing materials with specific thermal conductivity, heat capacity, and emissivity characteristics. By selecting sacrificial objects with appropriate thermal parameters, the system achieves temperature uniformity through material property optimization rather than complex control mechanisms.
3Temperature
If sacrificial objects are strategically placed to provide dynamic heating, then temperature uniformity is improved, but the quantity of additional materials increases
Solution Approach 1:
Rather than attempting to heat the entire build bed uniformly, the patent applies heating action only to specific localized regions where temperature gradients are most problematic. Sacrificial objects are positioned strategically at critical thermal zones rather than distributing them uniformly throughout the build bed, providing sufficient thermal compensation with minimal material 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 effectively maintains temperature uniformity across the printing area, reducing warpage and ensuring accurate dimensional representation of the target object by dynamically adjusting the temperature distribution with sacrificial objects.
Implementation Method 1
a second distance from the target object within a heat dissipation range of the sacrificial object
Implementation Method 2
Energy may be applied to fuse the final materials together
Data Source
AI summary
In one implementation, a system comprising a target engine, a thermal engine, and a sacrificial object engine is described. The target engine is to identify a target region of a build bed of a print device where a target object is to be located. The thermal engine is to identify a temperature level of the target region. The sacrificial object engine is to identify an object location to place a sacrificial object in response to a determination that the temperature level of the target region is deficient to achieve a temperature threshold for production.