Meandering Anilox Roll Channels for High-Resolution Ink Transfer
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Anilox rolls in printing methods face challenges in balancing high resolution and color intensity due to limitations in line screens, leading to ink residue and inefficient ink transfer, which affects printing speed and quality, and require frequent cleaning, causing waste and downtime.
Innovation Solution
The anilox roll features a fluid distribution structure with meandering channels and restrictions, allowing dual operational modes for printing both heavy layers and details, reducing ink residue and improving transfer efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If cells with larger volume are used to increase color intensity, then ink transfer amount is improved, but printing resolution deteriorates
Solution Approach 1:
The anilox roll surface is segmented into two distinct types of cells: first cells with larger volume for transferring heavy layers of ink, and second cells with smaller volume for printing details. This segmentation allows each cell type to be optimized for its specific function, resolving the contradiction between ink transfer amount and printing resolution.
Solution Approach 2:
Different regions of the anilox roll surface are assigned different cell characteristics. The first cells are distributed across the surface for general ink transfer, while second cells are strategically positioned for detail printing. This local differentiation enables the same anilox roll to provide both high color intensity and high resolution in different areas.
2Manufacturing precision
If higher line screen density is used to improve printing resolution, then detail printing is improved, but ink transfer amount deteriorates
Solution Approach 1:
The cell population is segmented into two groups with different densities and volumes. The first cells provide the necessary ink transfer capacity for heavy layers, while the second cells with higher density provide the resolution needed for details. This dual-segmentation approach eliminates the need to choose between resolution and ink transfer amount.
Solution Approach 2:
The anilox roll is designed to perform multiple functions simultaneously: it can print both heavy layers of ink and fine details in a single printing operation. The combination of first cells and second cells enables this multi-functionality, allowing the same roll to serve both purposes without requiring multiple rolls.
3Device complexity
If single line screen anilox rolls are used, then device simplicity is maintained, but adaptability deteriorates
Solution Approach 1:
The anilox roll incorporates two types of cells with different characteristics on the same surface, enabling it to adapt to different printing requirements. Whether the job requires heavy ink layers or fine details, the appropriate cell type will transfer the ink, providing versatility without requiring multiple specialized rolls.
Solution Approach 2:
The printing system becomes dynamically adaptable by incorporating cells of two different types. The effective line screen density becomes variable depending on which cells are actively transferring ink to which areas of the substrate, allowing the system to adjust its characteristics to match the printing requirements.
4Ease of manufacture
If conventional cell structures are used, then manufacturing simplicity is maintained, but productivity deteriorates due to frequent cleaning
Solution Approach 1:
The cell structure is segmented into two types with different functions, which prevents ink residue accumulation that would otherwise require frequent cleaning. The distinct cell geometries reduce the tendency for ink to remain trapped, thereby maintaining productivity without compromising manufacturing simplicity.
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 solution enables high-resolution printing with desired color intensity while minimizing ink residue and cleaning frequency, enhancing printing speed and reducing waste.
Implementation Method 1
The intensity of the laser is sufficient for locally vaporising the material of the outer layer of the anilox roll, for example chromium oxide. This will form a cell.
Implementation Method 2
Patterns and cells on the surface of the anilox roll can be formed using a laser by performing a laser engraving method.
Data Source
Figure 1~2b
Figure 3a~3d
Figure 3e~4
AI summary
The invention relates to an anilox roll (5) for a printing apparatus. The anilox roll (5) comprises a cylinder having a surface (100). The surface comprises a fluid distribution structure for receiving, distributing and transferring a fluid such as an ink. The fluid distribution structure comprises a channel formed in the surface having channel walls. This channel is arranged for distributing the fluid over the fluid distribution structure. The channel comprises channel parts, wherein the courses of connected channel parts are at an angle with respect to each other for preventing a linear distribution of the fluids to be received in a course direction of the channel, allowing a meandering distribution of the fluid to be received in the channel. Side walls of the channel are arranged for allowing a meandering flow of the fluid throughout the fluid distribution surface.