3D Shaping Heater Control for Predicted Service Life Limits
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Solution Overview
Problem
Three-dimensional shaping apparatuses face issues with part deterioration over time, leading to potential disruptions and quality issues during the shaping process, as existing solutions require part replacement mid-shaping, which can result in suspension or resumption of shaping and decreased quality.
Innovation Solution
A three-dimensional shaping apparatus with a plasticizing section, ejection section, moving mechanism, state observation, prediction, and control unit that adjusts the heater temperature and drive motor speed based on predicted residual service life, allowing for continuous shaping by switching between two modes: one with a higher temperature and another with a lower temperature, thereby extending the service life of the heater and maintaining shaping quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the heater operates at a high temperature to maintain shaping quality, then the shaping quality is maintained, but the heater deteriorates faster and requires replacement mid-shaping
Solution Approach 1:
The heater temperature is made dynamic rather than static. The control unit switches between first temperature (higher) and second temperature (lower) based on real-time residual service life predictions. This dynamic adjustment allows the system to maintain high shaping quality when the heater is healthy while extending its service life by reducing temperature when deterioration is detected, thereby resolving the contradiction between maintaining shaping quality and extending heater service life.
Solution Approach 2:
The operating temperature parameter of the heater is changed based on its degradation state. When the predicted residual service life exceeds a threshold, the system operates at the first (higher) temperature to ensure shaping quality. When the predicted residual service life falls below the threshold, the system switches to the second (lower) temperature to reduce thermal stress and extend the heater's service life, preventing mid-shaping replacement.
2Duration of action of stationary object
If the heater is replaced mid-shaping to maintain service life, then the heater service life is managed, but the shaping process is suspended and quality deteriorates
Solution Approach 1:
The system performs preliminary action by predicting the heater's residual service life before actual deterioration occurs. The state observation section continuously monitors heater parameters, and the prediction section forecasts remaining service life. This allows the control unit to proactively switch to the second temperature mode before the heater fails, ensuring continuous shaping operation without suspension or quality deterioration, thereby resolving the contradiction between managing heater service life and maintaining shaping continuity.
Solution Approach 2:
The system ensures continuity of the shaping action by switching between two temperature modes rather than replacing the heater mid-shaping. The control unit maintains uninterrupted shaping operation by adjusting the heater temperature based on predicted service life, eliminating suspension and resumption cycles. This continuous operation prevents quality deterioration and maintains productivity while managing heater service life.
3Duration of action of stationary object
If the heater temperature is reduced to extend service life, then the heater service life is extended, but the shaping quality may deteriorate
Solution Approach 1:
The heater temperature is dynamically adjusted based on the heater's actual condition rather than being statically reduced. The system operates at the first (higher) temperature when the heater is healthy to ensure shaping quality, and only switches to the second (lower) temperature when prediction indicates impending deterioration. This dynamic approach ensures shaping quality is maintained during the majority of the heater's service life while still extending overall service life by reducing temperature only when necessary.
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 extends the period before heater replacement is needed, reduces the likelihood of shaping quality deterioration due to suspension or resumption, and ensures continuous operation without decreasing the set temperature of the heater, enhancing overall shaping efficiency and quality.
Implementation Method 1
a heater, and a screw rotated by the drive motor and that plasticizes a material to form a shaping material
Implementation Method 2
a drive motor, and a screw rotated by the drive motor
Data Source
AI summary
A three-dimensional shaping apparatus includes a plasticizing section that includes a drive motor, a heater, and a screw rotated by the drive motor and that plasticizes a material to form a shaping material, an ejection section that ejects the shaping material toward a stage, a moving mechanism section that changes a relative position of the ejection section to the stage, a prediction section that predicts a residual service life of the heater from an observation result of a state observation section that observes a state of the heater, and a control unit that controls the plasticizing section and the moving mechanism section to shape a three-dimensional shaped article. The control unit has a first mode in which a temperature of the heater is set to a first temperature and a second mode in which the temperature of the heater is set to a temperature lower than the first temperature, and shapes the three-dimensional shaped article in the first mode when a first residual service life when the temperature of the heater is set to the first temperature exceeds a first value, and shapes the three-dimensional shaped article in the second mode when the first residual service life is equal to or less than the first value.