3D Printing Build Space Control for Binder Drying and Strength
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Solution Overview
Problem
Existing 3D printing methods often result in components with inadequate strength and geometric deviations due to premature drying of binders, which can be economically limiting and technologically constrained by the limited increase in water glass content.
Innovation Solution
A method and device that control the relative humidity and solvent concentration in the build space, along with temperature control, to regulate the drying and hardening process of 3D components, allowing for targeted strength and surface quality optimization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the drying process is accelerated to improve surface quality, then the surface quality improves, but the component strength decreases due to premature drying
Solution Approach 1:
The patent applies preliminary action by controlling the drying process to occur progressively rather than all at once. The build space environment is regulated to allow controlled moisture removal, preventing premature drying that would weaken the component while still achieving surface quality improvement over time.
Solution Approach 2:
The patent changes physical parameters by regulating temperature and humidity in the build space. By maintaining controlled temperature and relative humidity levels, the drying process is optimized to balance surface quality improvement with component strength preservation through gradual moisture removal.
2Shape
If water glass content is increased to improve surface quality, then surface quality improves, but the economic feasibility decreases
Solution Approach 1:
The patent changes the approach from modifying material composition to modifying process parameters. Instead of increasing water glass content, the invention regulates temperature and humidity in the build space to achieve surface quality improvement, thereby maintaining economic feasibility while reaching the quality objective.
3Shape
If cement is added to absorb moisture to improve surface quality, then surface quality improves, but the component strength decreases due to premature drying effect
Solution Approach 1:
The patent converts the harmful premature drying effect into a beneficial controlled drying process. By regulating the build space environment, the moisture removal process that would normally weaken the component is transformed into a controlled process that improves surface quality while preserving strength through gradual hardening.
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 enables the production of 3D components with improved strength and surface quality, expanding the range of usable materials and enhancing the economic feasibility of the process by maintaining size accuracy and reducing property variance.
Implementation Method 1
Drying or evaporating the fluid in 3D printing processes of this type also results in a solidification and formation of a molded part
Implementation Method 2
the temperature in the build space being set to a selected temperature
Implementation Method 3
the relative humidity or the relative solvent concentration in the atmosphere in the build space being set to a selected value
Data Source
AI summary
The invention relates to a method for producing 3D components, particulate material being applied in layers to a building platform in a closed build space and printing fluid being selectively applied, and these steps being repeated until a three-dimensional component is obtained, the relative humidity or the relative solvent concentration in the atmosphere in the build space being set to a selected value, and/or the temperature in the build space being set to a selected temperature.