3D Printer Laser Scanning Segmentation for Overheating
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Solution Overview
Problem
The existing lamination molding process using laser sintering faces challenges in shortening the time required for the process without compromising the quality of the molded product, as reducing the cooling period between laser irradiation lines can lead to overheating, bulging, spatter, and composition changes in the material powder layer.
Innovation Solution
A powder sintering lamination molding method where the laser beam is scanned along a scanning passage composed of line groups, with a controlled cooling period after irradiation on one line before irradiation on an adjacent line, allowing irradiation of lines outside the immediate group to manage heat distribution and prevent overheating, while maintaining an adequate cooling period to ensure quality without extending the overall process time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the cooling period between laser irradiation lines is extended to prevent overheating, then the quality of molded product is improved, but the time required for lamination molding is extended
Solution Approach 1:
The scanning passage is divided into multiple line groups, where each line group contains multiple lines arranged adjacently. By controlling laser irradiation in a systematic sequence across these segmented line groups and maintaining appropriate cooling periods between adjacent lines, the patent prevents overheating while efficiently utilizing irradiation time, thus improving product quality without excessively extending the overall molding time.
2Productivity
If the cooling period between laser irradiation lines is shortened to reduce process time, then the productivity is improved, but overheating and material defects occur
Solution Approach 1:
The patent implements periodic action by systematically controlling the laser irradiation sequence across multiple line groups with predetermined cooling periods between adjacent lines. This periodic irradiation pattern ensures adequate heat dissipation time is built into the process rhythm, preventing overheating and material defects while maintaining efficient productivity through continuous systematic operation.
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 method effectively balances cooling time and process efficiency, preventing overheating and ensuring high-quality molded products by strategically controlling laser irradiation across line groups, thus reducing the overall time required for lamination molding.
Implementation Method 1
a predetermined portion of the material powder layer is irradiated with a laser, thereby sintering the material powder at the position of irradiation
Implementation Method 2
irradiating an irradiation region of the sliced layer of the molded product surrounded by an outline profile with a laser beam to selectively sinter the material powder of the material powder layer within the irradiation region
Data Source
AI summary
A powder sintering lamination molding method which can improve the quality of the molded product without extending the time required for the lamination molding. A powder sintering lamination molding method, including the steps of, irradiating an irradiation region of the sliced layer of a molded product surrounded by an outline profile with a laser to selectively sinter the material powder of the material powder layer within the irradiation region; wherein a cooling period is provided after the laser is irradiated along the first line and before the laser is irradiated along the second line.