Liquid Discharge Head Trajectory for Uniform Coating Speed
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Solution Overview
Problem
Existing liquid discharge apparatuses face challenges in maintaining productivity while ensuring uniform application quality, particularly when dealing with complex object surfaces, as adjusting discharge distances and angles can slow down the process.
Innovation Solution
A liquid discharge apparatus with a controller that determines a linear trajectory, outputs commands for moving positions and discharge positions, and selectively skips certain positions to maintain discharge distance and angle within threshold ranges, thereby optimizing productivity and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the liquid discharge apparatus adjusts discharge distances and angles to maintain uniform application quality on complex object surfaces, then the application quality is improved, but the processing speed decreases and productivity is reduced
Solution Approach 1:
The patent implements dynamic trajectory generation that adapts the head movement path based on the object's surface geometry. The system calculates optimal trajectories that maintain consistent discharge conditions while moving across complex surfaces, allowing the apparatus to automatically adjust positions without manual intervention for each position change, thus maintaining quality while improving speed
Solution Approach 2:
The system performs preliminary calculation of the optimal linear trajectory and discharge positions before actual liquid discharge begins. By pre-computing the sequence of moving positions and corresponding discharge positions based on the object's 3D information, the system eliminates real-time calculation delays and enables high-speed execution while maintaining uniform application quality
2Productivity
If the liquid discharge apparatus maintains a fixed linear trajectory with predetermined moving positions, then the processing speed is improved, but the liquid application quality becomes non-uniform on complex surfaces
Solution Approach 1:
The system dynamically adjusts discharge parameters including the sequence of moving positions and discharge positions along the linear trajectory. By modifying these parameters based on the object's surface characteristics and discharge conditions, the system maintains both high processing speed through linear motion and uniform liquid application quality through adaptive parameter selection
3Manufacturing precision
If the liquid discharge apparatus uses a complex multi-axis positioning system to adjust discharge positions for each point, then the application quality is improved, but the device complexity increases and processing time is extended
Solution Approach 1:
The patent segments the liquid discharge process into discrete moving positions and discharge positions along a linear trajectory. By dividing the continuous discharge path into manageable segments with predetermined positions, the system achieves precise discharge control using simple linear motion rather than complex multi-axis positioning, reducing device complexity while maintaining accuracy
Solution Approach 2:
The system introduces an intermediary computational layer that translates complex surface geometry requirements into simple linear trajectory commands. The trajectory generation unit acts as an intermediary that processes 3D object information and discharge conditions to produce optimized moving position sequences, eliminating the need for complex real-time positioning control hardware
Data Source
AI summary
A liquid discharge apparatus includes a head, a position changer, and circuitry. The head has a nozzle. The head discharges a liquid from the nozzle to apply the liquid onto a surface of an object. The head has a prescribed discharge condition. The position changer changes a relative position between the object and the head. The circuitry determines a linear trajectory along which the position changer moves the head based on the prescribed discharge condition, outputs a first command including multiple moving positions along the linear trajectory to the position changer to cause the position changer to move the head along the linear trajectory, and outputs a second command including multiple discharge positions to the head to cause the head to discharge the liquid at the multiple discharge positions.