3D Model Feature Protection for Thin-Feature Printing
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Solution Overview
Problem
Three-dimensional printing faces challenges in accurately retaining thin features of a three-dimensional object, such as hair or fins, which can break apart or be poorly reproduced due to thermal expansion and binder fluid issues, and in metal printing systems where maintaining the 'green part' is difficult.
Innovation Solution
The solution involves selectively saving or growing thin features by applying erosion or dilation techniques, using a cut vertex lookup table and setting a minimum feature size, and identifying a skeleton to ensure features are preserved in the printed object, employing modules for three-dimensional model analysis, configuration analysis, and modification to manage feature sizes and configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If erosion or dilation techniques are applied to retain thin features, then feature preservation is improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies erosion and dilation techniques to the three-dimensional model before printing to proactively preserve thin features. By performing these morphological operations in advance, the system compensates for expected feature loss during printing, ensuring thin features like hair or fins are retained in the final object without requiring complex real-time adjustments during the printing process.
Solution Approach 2:
The system selectively applies different processing treatments to different regions of the three-dimensional model based on local feature characteristics. Thin features identified through skeleton extraction receive specialized erosion/dilation treatment, while other regions maintain their original geometry. This localized approach preserves critical features without unnecessarily complicating the processing of the entire model.
2Manufacturing precision
If thin features are retained in the three-dimensional model, then feature completeness is improved, but printing reliability deteriorates due to thermal expansion and binder fluid issues
Solution Approach 1:
The patent applies preliminary anti-action by performing morphological operations (erosion and dilation) on the three-dimensional model to counteract the expected harmful effects of thermal expansion and binder fluid bleed during printing. By pre-adjusting the model geometry, particularly protecting thin features through skeleton-based dilation, the system compensates for anticipated distortion, ensuring features are retained despite the inherent reliability issues of the printing process.
Data Source
AI summary
In some examples, with respect to feature protection for three-dimensional printing, a three-dimensional model of a three-dimensional object to be printed may be ascertained. A determination may be made as to whether a configuration of a three-dimensional model feature of the three-dimensional model matches a removable feature configuration from a set of removable feature configurations. Based on a determination that the configuration of the three-dimensional model feature of the three-dimensional model matches the removable feature configuration from the set of removable feature configurations, the three-dimensional model feature may be removed from the three-dimensional model to generate a modified three-dimensional model.