3D Printer Build Chamber Temperature Control via Directed Preheating
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Solution Overview
Problem
Existing three-dimensional printing systems face inefficiencies in heating the build chamber, particularly early in the fabrication process when only a small amount of build material requires thermal management, leading to wasted energy due to diffuse heating throughout the entire build volume.
Innovation Solution
A three-dimensional printer system that uses directed heat to preheat the build region where the build will initiate, followed by circulating heated air at a variable flow rate to maintain the target temperature, employing a heater and blower to efficiently manage temperature within the build chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the entire build chamber is heated from the beginning, then the thermal environment is regulated, but heating inefficiency occurs when only a small amount of build material requires thermal management
Solution Approach 1:
The patent applies local quality by directing heated air preferentially to the build region rather than uniformly heating the entire build chamber. The blower is positioned to create a focused airflow pattern that concentrates thermal energy where the build material is located, while other regions of the chamber receive less heating. This resolves the contradiction by providing adequate temperature regulation for the build area without wasting energy heating empty spaces.
Solution Approach 2:
The heating process is segmented into two distinct phases: an initial phase where heated air is directed primarily at the build region, and a subsequent phase where the entire chamber is heated. This segmentation allows the system to adapt heating intensity to the actual thermal needs at different stages of the build process, improving overall energy efficiency while maintaining proper temperature regulation.
2Productivity
If heat is diffused throughout the entire build volume, then the thermal environment is uniform, but preheating takes longer
Solution Approach 1:
The system performs preliminary action by preheating the build region first before initiating the build process. The blower directs concentrated heated air to the build area in advance, bringing it to the required temperature quickly. Once the build begins and more material is present, the system transitions to uniform chamber heating. This preliminary focused heating resolves the contradiction by achieving rapid preheating of the critical region without requiring immediate uniform heating of the entire volume.
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 allows for rapid preheating of the build region and efficient temperature maintenance throughout the build chamber, reducing energy waste and improving heating efficiency by focusing initial heating on the build area and adjusting airflow rates based on temperature sensors.
Implementation Method 1
a heater and blower that moves air at a variable flow rate in response to a control signal
Implementation Method 2
a blower that moves air at a variable flow rate in response to a control signal. The blower is positioned to move the air over the heater toward the build region
Data Source
AI summary
A build chamber of a three-dimensional printer uses directed heat to preheat a region within the chamber where a build will be initiated, and then uses circulating, heated air to maintain a target temperature for the entire build volume after the build is initiated. A fixed heating element and blower may advantageously be used for both heating steps, and preheating may be accomplished more quickly by initially directing heat at the locus of build initiation rather than diffusing heat throughout an entire build volume.