Liquid Ejector Moisture Control for Fabric Wrinkle Prevention
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Solution Overview
Problem
Existing liquid ejectors face challenges in maintaining optimal moisture content in fabrics during printing, leading to issues such as wrinkling or smearing due to varying fabric materials, thickness, and water absorption rates, which affect image quality.
Innovation Solution
A liquid ejector system with a conveyance unit, ejection unit, and moisture applying unit that includes a holding unit for a fabric roll, a conveyance unit to pull out and convey the fabric, an ejection unit to apply liquid, and a moisture applying unit to adjust moisture levels on the roll body, using detection units to monitor and control moisture content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If moisture is applied to the fabric surface before printing, then image quality improves by preventing wrinkles and raising, but for thick fabrics the moisture takes too long to penetrate through the fabric thickness, causing the moisture content to not reach the predetermined range within the processing time
Solution Approach 1:
The patent applies moisture to the fabric roll body before the fabric is conveyed through the printing unit. This preliminary moisture application allows thick fabrics to absorb moisture from the inside out as the roll rotates, ensuring adequate moisture penetration without extending the printing processing time. The moisture applying unit treats the fabric in its rolled state, performing the moisture penetration action in advance of the actual printing operation.
2Manufacturing precision
If moisture is applied to the fabric, then wrinkling and raising are prevented improving image quality, but excessive moisture causes smearing that deteriorates image quality
Solution Approach 1:
The patent incorporates a moisture content detection unit that measures the moisture content of the fabric and provides feedback to the control unit. The control unit adjusts the moisture application amount based on this feedback to maintain moisture content within a predetermined range. This closed-loop control prevents both insufficient moisture (causing wrinkles) and excessive moisture (causing smearing), thereby optimizing image quality.
Solution Approach 2:
The patent dynamically adjusts the moisture application parameters (amount, timing) based on fabric type, thickness, and detected moisture content. The system changes operational parameters to match the specific fabric characteristics, ensuring optimal moisture levels are achieved without causing smearing or other image quality deterioration.
3Stability of the object's composition
If the fabric roll body is held and moisture is applied to it, then consistent moisture content is achieved across different fabric types and thicknesses, but the device complexity increases with additional holding and moisture applying units
Solution Approach 1:
The patent designs the moisture applying unit to treat the fabric roll body in a universal manner that works for various fabric types and thicknesses. Rather than requiring separate treatment mechanisms for different fabric characteristics, the system uses a single multi-functional moisture applying unit that can adapt to different fabrics through parameter adjustments and feedback control, reducing overall system complexity while maintaining moisture content consistency.
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 system ensures consistent moisture application, preventing wrinkles and smearing by maintaining fabrics within a predetermined moisture content range, thereby enhancing image quality.
Implementation Method 1
Fabrics vary in water absorption speed depending on the materials. In addition, if a fabric has a greater thickness, it takes a longer time for moisture of the fabric on the surface where the moisture has been absorbed to reach the surface on the side opposite to the aforementioned surface.
Data Source
AI summary
A liquid ejector includes a holding unit capable of holding a roll body around which a fabric is wound, a conveyance unit capable of pulling out the fabric from the roll body to convey the fabric, an ejection unit capable of ejecting a liquid to be fabric pulled out from the roll body, and a moisture applying unit that applies moisture to the roll body held by the holding unit.