3D Printing Head Band Width Control for Curved Surface Quality
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Solution Overview
Problem
In three-dimensional object printing, the quality of the image formed on a curved surface deteriorates when the start position of the printing region deviates from the ideal position, leading to issues like white and black stripes due to overlapping band regions with varying widths.
Innovation Solution
A three-dimensional object printing apparatus and method that adjusts the width of band regions and includes overlapping regions to prevent these defects, ensuring consistent ink application across the surface by controlling the relative position and posture of the head and workpiece using a 6-axis robot, with specific width settings and overlapping patterns to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the printing region is divided into multiple band regions for printing, then the printing coverage is increased, but the image quality deteriorates when start position deviates
Solution Approach 1:
The printing region is divided into multiple band regions that are printed sequentially. Each band region is defined with specific width characteristics where the width at the start position is smaller than the width at other positions, allowing for overlap compensation. This segmentation enables comprehensive coverage while maintaining quality through controlled overlapping.
Solution Approach 2:
The band regions are pre-configured with asymmetric width characteristics before printing begins. The width at the start position is deliberately made smaller than the width at other positions, creating a built-in compensation mechanism that prevents image quality deterioration even when start positions deviate during multi-band printing operations.
2Adaptability or versatility
If band regions are printed with varying widths, then coverage flexibility is improved, but white and black stripes are generated
Solution Approach 1:
Different portions of the band region are assigned different width characteristics. Specifically, the width at the start position is made smaller than the width at other positions. This local differentiation allows the band region to adapt to positioning variations while preventing the generation of white and black stripes through controlled overlap patterns.
3Productivity
If the number of band regions is reduced to optimize productivity, then manufacturing time is decreased, but image quality control becomes more difficult
Solution Approach 1:
The width parameter of band regions is changed asymmetrically, with the start position width being smaller than the width at other positions. This parameter modification enables fewer band regions to achieve complete coverage while maintaining image quality, as the asymmetric width design inherently compensates for positioning deviations and eliminates the need for excessive overlapping.
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
Prevents the generation of white and black stripes, maintaining image quality even when the start position deviates, while optimizing productivity by minimizing the number of band regions and reducing manufacturing time.
Implementation Method 1
a head that ejects a liquid to a printing region on a workpiece
Data Source
AI summary
A three-dimensional object printing apparatus includes a head that ejects a liquid to a printing region on a workpiece, and a movement mechanism that changes a relative position and posture between the workpiece and the head, and executes a first printing operation and a second printing operation. The printing region includes a first band region into which the liquid is ejected in the first printing operation and a second band region into which the liquid is ejected in the second printing operation. When a width of the first band region at a first position is set as a first width and a width of the first band region at a second position is set as a second width, the first width is less than the second width, and a part of the printing region overlaps with a part of the second band region at the first position.