Printing apparatus and printing method
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Solution Overview
Problem
Existing printing technologies do not adequately address the challenge of printing on fabrics, as they fail to consider the unique directional properties of warp and weft threads, leading to uneven ink distribution and potential bleed-through issues.
Innovation Solution
A printing apparatus and method that compares the relative areas occupied by warp and weft threads on a fabric and adjusts ink discharge accordingly, reducing ink amount in the direction of the thread with greater exposure to prevent bleed-through and optimize ink consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If ink discharge is increased to improve color quality, then color quality is improved, but ink bleed-through increases
Solution Approach 1:
The patent applies local quality by adjusting ink discharge amounts based on the local fabric structure. Specifically, the ink discharge amount is varied according to the yarn density and direction at each printing position, allowing optimal ink deposition that prevents bleed-through while maintaining color quality in different regions of the fabric
Solution Approach 2:
The patent changes the parameter of ink discharge amount dynamically based on fabric characteristics. By detecting yarn density and direction, the system adjusts ink discharge parameters (volume, velocity) to match the local fabric structure, preventing overflow and bleed-through while ensuring sufficient color deposition
2Device complexity
If uniform ink discharge is used to simplify printing control, then device complexity is reduced, but manufacturing precision deteriorates due to uneven ink distribution
Solution Approach 1:
The patent performs preliminary action by detecting and analyzing fabric yarn density and direction before the actual printing process. This advance information is used to pre-calculate the optimal ink discharge pattern, allowing the printing system to apply precise variable ink discharge without requiring complex real-time adjustments during printing
Solution Approach 2:
The patent implements feedback by using detection means to measure fabric yarn characteristics and feeding this information back to the ink discharge control system. This closed-loop control enables the system to automatically adjust ink discharge amounts based on actual fabric conditions, achieving precise ink distribution while maintaining relatively simple device architecture
3Object-affected harmful factors
If ink discharge is reduced to prevent bleed-through, then ink bleed-through is suppressed, but ink consumption increases due to need for multiple passes
Solution Approach 1:
The patent optimizes ink consumption by dynamically changing ink discharge parameters based on yarn density. In high-density yarn regions where bleed-through risk is lower, the system increases ink discharge to reduce the need for multiple printing passes, while in low-density regions it reduces discharge to prevent bleed-through, achieving efficient single-pass or reduced-pass printing
Data Source
AI summary
A printing apparatus according to the present disclosure provides a printing apparatus configured to discharge a liquid to a medium that is a fabric woven by using a first yarn in a first direction and a second yarn in a second direction intersecting the first direction, to perform printing, the printing apparatus including: a comparing unit configured to compare a size of a region occupied by the first yarn per unit area and a size of a region occupied by the second yarn in a surface of the medium at which the liquid is discharged, and a printing control unit configured to control printing based on image data, in which the printing control unit controls printing based on the image data such that, when the region occupied by the first yarn per unit area is greater than the region occupied by the second yarn, the amount of discharge of the liquid arranged in the first direction reduces as compared with when the region occupied by the first yarn per unit area is not greater than the region occupied by the second yarn.