Printing Vehicle Hexagonal Raster Ink Efficiency
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Solution Overview
Problem
The industrial print industry faces challenges such as high capital costs, sensitivity to mechanical tolerances, limited flexibility in print size and substrate type, and inefficiencies in ink usage, leading to increased costs and reduced productivity due to the need for large and complex printing systems.
Innovation Solution
The implementation of a novel printing system utilizing a hexagonal raster and multiple non-orthogonal printing directions, enabled by a self-contained printing vehicle (APV) that can traverse and print on various substrates with enhanced nozzle usage and ink efficiency, reducing the number of nozzles required and allowing for flexible print sizes and orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of print heads is increased to achieve higher throughput, then productivity is improved, but system cost and device complexity increase disproportionately
Solution Approach 1:
The printing system is divided into multiple independent printing vehicles (APVs), each capable of autonomous operation. Each APV contains its own print heads, ink delivery system, and control electronics, allowing the system to scale by adding independent units rather than expanding a single complex system.
Solution Approach 2:
The patent transitions from a single-dimensional linear array of print heads to a two-dimensional array of printing vehicles operating in parallel. Multiple APVs can print simultaneously on different sections of the substrate, achieving higher throughput through spatial parallelism rather than simply adding more nozzles to a single carriage.
2Productivity
If the nozzle array length is increased to improve productivity, then throughput increases, but manufacturing precision requirements and costs increase non-linearly
Solution Approach 1:
The continuous nozzle array is segmented into multiple discrete printing vehicles, each with its own compact nozzle array. This segmentation reduces the length of individual nozzle arrays, thereby reducing the cumulative tolerance stacking and mechanical precision requirements while maintaining overall system throughput through parallel operation.
Solution Approach 2:
Each printing vehicle is equipped with sensors and control systems that provide real-time feedback on nozzle performance, dot placement accuracy, and substrate position. This feedback enables dynamic compensation for variations, reducing the need for ultra-tight manufacturing tolerances on individual components.
3Reliability
If multi-pass printing is used to improve print quality, then print quality increases, but productivity decreases due to increased printing time
Solution Approach 1:
The printing task is segmented across multiple printing vehicles operating in parallel, each handling a portion of the substrate. This allows the system to achieve high print quality through adequate passes while maintaining productivity by having multiple vehicles work simultaneously, effectively distributing the multi-pass requirement across parallel streams.
4Ease of manufacture
If standard rectangular raster printing is used, then ease of manufacture is maintained, but ink usage efficiency and print quality are suboptimal
Solution Approach 1:
The patent employs hexagonal or staggered nozzle arrangements instead of traditional rectangular grids. This asymmetric configuration optimizes dot coverage and reduces ink consumption by improving the geometric efficiency of dot placement, while the modular APV design keeps the system manufacturable through standardized components.
Solution Approach 2:
The system allows dynamic adjustment of printing parameters including nozzle selection, print direction, and raster patterns. By optimizing these parameters for each specific printing task, the system achieves better ink efficiency and print quality without sacrificing ease of manufacture, as the same hardware can be reconfigured for different requirements.
Data Source
AI summary
A novel printing system and associated printing methods that can overcome many of the obstacles presented by today's printing systems. In certain embodiments a printing vehicle is presented that may work in cooperation with other vehicles to produce a system capable of delivering a wide range of productivity and scale. This printing system is amenable to novel printing methods that can reduce printing defects and ink consumption by up to 30%.