Inkjet Thread-Coating Module with Dynamic Printhead and Ink Recovery
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Solution Overview
Problem
Current systems for coating ink onto threads using pagewide inkjet printing technology lack efficiency and versatility, leading to suboptimal ink distribution and waste management.
Innovation Solution
A thread-coating system comprising a base plate with a printhead opening, a movable chamber unit, and an inkjet printhead that can adjust its angle for optimal ink ejection, along with an ink management system for recycling excess ink and aerosol collection, allowing for precise coating and minimal waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a stationary inkjet printhead is used for thread coating, then the system structure is simple, but ink distribution efficiency and coating precision are suboptimal
Solution Approach 1:
The patent implements a movable printhead assembly that can dynamically adjust its position and angle relative to the thread path. The printhead is mounted on a movable support structure allowing it to move toward and away from the coating chamber, and the printhead itself can pivot to optimize the ejection angle. This dynamic positioning enables precise ink distribution while maintaining operational simplicity through automated movement control.
Solution Approach 2:
The system divides the printhead functionality into separate adjustable components: the printhead assembly, the support structure, and the pivot mechanism. This segmentation allows each component to be optimized independently - the printhead for ink ejection precision, the support for movement control, and the pivot for angle adjustment - thereby achieving high coating precision without requiring complete system redesign.
2Loss of substance
If excess ink is not collected and recycled, then the system operation is simple, but ink and water wastage increases
Solution Approach 1:
The patent incorporates an ink collection system with a collection slot positioned to receive excess ink that does not adhere to the thread. A vacuum opening connected to a vacuum source creates negative pressure to draw excess ink and aerosol into the collection chamber. The recovered ink can then be recycled back into the system, significantly reducing ink and water wastage while the automated collection process minimizes the operational complexity burden.
Solution Approach 2:
The system converts the harmful effect of excess ink and aerosol (which would otherwise be waste) into a beneficial resource by collecting and recycling it. The vacuum collection system transforms potential pollution and waste into recoverable material, turning a negative aspect of the coating process into a positive sustainability feature.
3Productivity
If the printhead angle is fixed, then the device structure is simple, but ink ejection optimization is limited
Solution Approach 1:
The printhead is mounted on a pivot mechanism that allows it to rotate about an axis perpendicular to the base plate, enabling dynamic adjustment of the ink ejection angle. This angular adjustment optimizes the trajectory of ink droplets toward the moving thread, improving coating efficiency and speed. The automated pivot control ensures that the complexity is managed through systematic movement rather than manual intervention.
4Productivity
If multiple threads are coated simultaneously, then the productivity increases, but the ink distribution uniformity decreases
Solution Approach 1:
The system employs a wide-format printhead with multiple nozzle arrays that can be independently controlled. Each nozzle or group of nozzles can be individually addressed and adjusted to account for variations in thread position, tension, and coating requirements. This localized control ensures uniform ink distribution across multiple threads even as they move through the coating chamber at high speed, maintaining precision while achieving high productivity.
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 enables efficient and versatile ink coating of multiple threads with reduced ink and water wastage, improving speed and cost-effectiveness in thread coloring processes.
Implementation Method 1
an inkjet printhead received in the printhead opening for ejecting ink onto the thread
Implementation Method 2
the chamber unit has a vacuum opening for collecting ink aerosol
Data Source
AI summary
A thread-coating module includes: a base plate having a printhead opening; an inkjet printhead received in the printhead opening; and a chamber unit having a mouth for engagement with the base plate and an ink-collection slot opposing the printhead. The chamber unit and the base plate are movable relative to each other for opening and closing a coating chamber comprising the base plate and the chamber unit, with the ink-collection slot being positioned opposite the printhead in the coating chamber.