Slot Die Spacer Alignment for Uniform Coating Width
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Solution Overview
Problem
Conventional coating apparatuses face challenges in accurately adjusting the offset between the die lip and spacer of a slot die, leading to deviations in coating width and interface defects due to misalignment, which is exacerbated by the lack of quantitative measurement and skill-dependent alignment processes.
Innovation Solution
An offset adjusting device comprising an offset measuring module and an offset adjusting module that quantitatively measures and aligns the spacer relative to the die lip, ensuring precise and stable alignment through a support bracket, indicator, moving stage unit, and control unit, allowing for real-time adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the offset is adjusted by pulling the spacer to the opposite side of the die lip using a block, then the alignment can be performed manually, but it is difficult to quantitatively measure the offset and the alignment accuracy depends on operator skill level
Solution Approach 1:
The patent replaces the manual mechanical block-pulling method with an automated motor-driven moving stage system. The moving stage unit, driven by a motor, precisely positions the spacer relative to the die lip based on quantitative offset measurements, eliminating dependence on operator skill while achieving accurate alignment through automated control.
Solution Approach 2:
The patent implements a feedback mechanism where the actual offset between the die lip and spacer is measured and compared against the target offset. Based on this feedback, the moving stage unit automatically adjusts the spacer position to minimize the offset error, ensuring precise alignment without manual intervention.
2Manufacturing precision
If the spacer alignment is not accurately performed, then the coating width deviation increases, but improving alignment accuracy requires complex measurement and adjustment mechanisms
Solution Approach 1:
The patent introduces a spacer as an intermediary component that physically separates and positions the die lips. By aligning the spacer rather than directly aligning the die lips, the system achieves precise coating width control through a simpler, more manageable intermediate element that can be easily measured and adjusted.
Solution Approach 2:
The alignment system is segmented into independent functional modules: an offset measuring module that quantifies the misalignment, and a moving stage unit that executes the correction. This segmentation allows each module to be optimized independently and simplifies the overall system compared to a monolithic alignment mechanism.
3Stability of the object's composition
If the offset between die lip and spacer varies along the longitudinal direction, then coating interface defects occur, but maintaining consistent offset requires precise control mechanisms
Solution Approach 1:
The patent performs preliminary alignment by measuring the offset between the die lip and spacer before the coating process begins. The moving stage unit pre-positions the spacer to the correct location based on the measured offset, ensuring consistent alignment throughout the coating process and preventing interface defects before they occur.
Data Source
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AI summary
An offset adjusting device capable of stably adjusting an offset between components of a coating agent applying device for discharging a coating agent, and a coating apparatus including the same are provided. The offset adjusting device according to one aspect of the present disclosure is configured for aligning a spacer provided in a slot die of a coating agent applying device configured to apply a coating agent to a substrate, and includes an offset measuring module configured to measure an offset between a die lip of the slot die and the spacer; and an offset adjusting module coupled to the spacer and configured to align the spacer according to the measured offset.