Additive Manufacturing Residence Time Optimization
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Solution Overview
Problem
In 3D-printing processes, the melted build material often exceeds its critical residence time, leading to degradation or thermal stress, which can result in poor component quality and unnecessary consumption of build material.
Innovation Solution
A method is introduced to optimize the production process by calculating and adjusting the resulting residence time of build materials within the heated nozzle, ensuring it remains below the critical residence time. This is achieved by dividing components into build portions, optimizing build material volume and discharge rate, and implementing additional elements to manage build material usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the build material is kept in the heated nozzle for extended periods to complete large volume components, then the component production is completed, but the build material degrades due to exceeding critical residence time
Solution Approach 1:
The component is divided into multiple build portions that are printed in sequential passes. The build material is replenished in segments rather than loaded all at once, allowing the material to be used before exceeding its critical residence time. This segmentation of the printing process enables completion of large components while maintaining material quality.
Solution Approach 2:
The system calculates the critical residence time for each build material and plans the printing process in advance to ensure material is discharged before degradation occurs. By preliminarily determining the maximum usable duration of materials and structuring build portions accordingly, the system prevents material degradation before it happens.
2Reliability
If build material is flushed out frequently to prevent degradation, then material quality is maintained, but unnecessary build material is consumed
Solution Approach 1:
The system continuously monitors the residence time of build material in the nozzle and provides feedback to control the printing process. Based on this feedback, the system optimizes the timing of material discharge and replenishment, flushing material only when necessary to prevent degradation rather than on a fixed schedule, thus reducing unnecessary consumption.
Solution Approach 2:
The system dynamically adjusts printing parameters such as discharge rate and build portion size based on the residence time calculations. By changing these parameters adaptively, the system maximizes the utilization of each batch of build material while ensuring it is discharged before exceeding critical residence time, minimizing waste.
3Ease of operation
If the nozzle temperature is maintained high to keep build material molten, then material flow is maintained, but material degradation occurs faster
Solution Approach 1:
The system dynamically adjusts the nozzle temperature based on the residence time of the build material. Rather than maintaining a constant high temperature, the temperature is modulated according to how long material has been in the nozzle, reducing temperature when material approaches its critical residence time to slow degradation while maintaining adequate flow during active printing.
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
The method effectively reduces the resulting residence time of build materials, preventing degradation and thermal stress, thereby improving the quality of produced components and optimizing build material consumption.
Implementation Method 1
a certain amount of build material is melted and remains in a heated nozzle at a temperature until the build material is discharged
Implementation Method 2
If the build material remains at too high a temperature for too long, for example, this can lead to degradation or thermal stress of the build material, which may result in a physical and/or chemical structural change in the build material
Data Source
AI summary
In a method for producing, by means of an additive manufacturing method or a 3D printing process, at least one component comprising at least two build materials each having a critical residence time T_x_max, data for producing the component are provided and the component is divided into at least one build portion having corresponding build portion information. After deriving at least one build material volume and at least one average removal rate per build portion from the build portion information, at least one build time per build portion and at least one resulting residence time t_x for each build material are calculated from the build material volume and the removal rate. The resulting residence times t_x are compared with the respective critical residence times T_x_max of the corresponding build materials. By virtue of the fact that at least one adaptation of the data is carried out. such that the respective resulting residence times t_x are less than the respective critical residence times T_x_max of the corresponding build materials, if at least one resulting residence time t_x exceeds the respective critical residence time T_x_max of the corresponding build material, this results in an optimization with regard to the consumption of the required build material and the quality of the component.