Multi-Head Liquid Discharge Apparatus for Ink Bleeding Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image forming technologies, such as DTF and DTG printers, face challenges in preventing white ink bleeding into color ink layers, leading to image blurriness and reduced quality, especially in direct-to-garment printing where white ink aggregation is crucial for image clarity.
Innovation Solution
A liquid discharge apparatus with multiple heads that discharge color ink, pretreatment liquid containing a coagulant, white ink, and binder liquid in specific sequences onto a transfer substrate or recording medium, ensuring the pretreatment liquid aggregates the white ink and prevents bleeding, while the binder liquid adheres the ink layers to the medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If white ink is applied directly onto color ink in DTF printing, then the printing process is simplified, but white ink bleeds into color ink layers causing image blurriness
Solution Approach 1:
The patent applies a pretreatment liquid containing a coagulant to the transfer substrate before applying white ink. This preliminary action causes the white ink to coagulate and aggregate on the substrate surface, preventing it from bleeding into the color ink layers during subsequent printing and transfer processes, thereby maintaining image clarity without complicating the overall printing workflow
2Manufacturing precision
If pretreatment liquid with coagulant is applied before white ink in DTG printing, then white ink aggregation is achieved, but the printing process requires additional steps
Solution Approach 1:
The patent combines the pretreatment liquid application and white ink application into a single integrated printing operation using a multi-head printing system. The pretreatment liquid is discharged from one head while white ink is discharged from another head simultaneously or in immediate sequence, achieving white ink aggregation without requiring separate pretreatment steps, thus reducing overall process complexity
3Manufacturing precision
If multiple liquid discharge heads are used to apply pretreatment liquid and binder liquid, then ink aggregation and adhesion are improved, but the apparatus structure becomes more complex
Solution Approach 1:
The patent employs a multi-functional liquid discharge head that can discharge multiple types of liquids (color ink, white ink, pretreatment liquid, and binder liquid) through a single integrated structure. This universal head design achieves improved ink aggregation and adhesion through coordinated discharge of multiple liquids while avoiding the need for separate specialized heads for each liquid type, thereby reducing overall apparatus structural complexity
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 approach enhances image quality by preventing white ink bleeding into color ink layers during the DTF method and ensures effective white ink aggregation in the DTG method, resulting in sharper and more vibrant images.
Implementation Method 1
The second head discharges a pretreatment liquid including a coagulant onto the transfer substrate onto which the color ink has been discharged by the first head
Data Source
AI summary
A liquid discharge apparatus includes a first head, a second head, and a third head. The first head discharges a color ink onto a transfer substrate. The second head discharges a pretreatment liquid including a coagulant onto the transfer substrate onto which the color ink has been discharged by the first head. The third head discharges a white ink onto the transfer substrate onto which the pretreatment liquid has been discharged by the second head.