Coating Head Nozzle Layout for Uniform Film Under Vibration
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Solution Overview
Problem
Existing coating technologies struggle to form a uniform coated film using a coating bar, as they often result in uneven thickness and stability issues due to vibration and pulsatory motion of the liquid supply.
Innovation Solution
A coating head design incorporating multiple nozzles, a first member with recesses, elastic members, and a position controller to stabilize nozzle positions and control the relative position between the nozzles and the coating bar, ensuring uniform liquid distribution and stable film formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a coating bar is used to coat liquid, then the coating process can be performed, but the coated film becomes uneven in thickness
Solution Approach 1:
The invention divides the single liquid supply point into multiple nozzles (first, second, and third nozzles) that are positioned at different locations. This segmentation of the liquid supply system allows for more uniform distribution of liquid across the coating bar surface, preventing thickness unevenness while maintaining process stability.
Solution Approach 2:
The invention introduces an elastic member as an intermediary element between the nozzles and the coating bar. This elastic member absorbs vibrations and pulsatory motions, acting as a mediator that isolates the liquid supply system from mechanical disturbances, thereby ensuring stable and uniform coating despite external vibrations.
2Productivity
If liquid is supplied to the coating bar, then coating can be performed, but vibration and pulsatory motion cause instability
Solution Approach 1:
The elastic member serves as a vibration-absorbing intermediary that decouples the liquid supply system from mechanical vibrations. This allows the system to maintain high coating speed while the elastic member filters out pulsatory motions, ensuring stable liquid supply to all nozzles simultaneously.
Solution Approach 2:
The invention positions multiple nozzles at different locations (first, second, and third nozzles at different positions relative to the coating bar) to address local variations in liquid distribution. Each nozzle supplies liquid to a specific region, ensuring uniform coverage across the entire coating bar surface even during high-speed operation.
3Manufacturing precision
If multiple nozzles are used to supply liquid, then uniform distribution can be achieved, but device complexity increases
Solution Approach 1:
The invention uses multiple nozzles (first, second, and third nozzles) segmented at different positions to achieve uniform liquid distribution. While this increases the number of components, each nozzle is relatively simple in structure, and their arrangement follows a systematic pattern that simplifies the overall positioning and alignment process.
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 solution enables the formation of a highly uniform coated film with reduced thickness unevenness, even under conditions of vibration and pulsatory liquid supply, by stabilizing nozzle positions and maintaining consistent liquid adhesion to the coating bar.
Implementation Method 1
One of the multiple elastic members 35 is located at a first position between one of the multiple third members 33 and one of the multiple second members 32
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3
AI summary
A coating head, a coating apparatus, and a coating method can form a uniform coated film. According to an embodiment, the coating head includes a coating bar, multiple nozzles that supply a liquid toward the coating bar, first to third members, an elastic member, and a position controller. The first member includes multiple first recesses. At least a portion of one of the nozzles is between one of the first recesses and one of the third members. The at least a portion of the one of the nozzles and the one of the third members are fixed to the first member by one of the second members. One of the elastic members is located in at least one of a first position between the one of the third members and the one of the second members, a second position between the at least a portion of the one of the first recesses and the one of the nozzles, or a third position between the at least a portion of the one of the nozzles and the one of the third members.