Two-Layer Coating Die Shim for Precise Slot Alignment
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Solution Overview
Problem
The existing coating die technology requires manual adjustment with micron-order accuracy for positioning two layers of coating liquids, which is time-consuming and degrades repeatability, especially in applications like lithium-ion cells where precise alignment is critical.
Innovation Solution
A coating die design featuring an integrated shim with recesses on both faces, eliminating the need for separate positioning of upper and lower layers, thereby reducing assembly steps and improving positioning accuracy between the two-layered coating films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment is used to position the coating die with micron-order accuracy, then positioning precision is improved, but assembly time increases and repeatability degrades
Solution Approach 1:
The shim is pre-designed with recesses on both faces that automatically define the positions of upper and lower discharge slots when sandwiched between the upper and lower die blocks. This preliminary design eliminates the need for manual positioning adjustments during assembly, achieving micron-order accuracy without increasing assembly time.
2Manufacturing precision
If manual adjustment is used to align the coating positions of two layers, then positioning accuracy is improved, but the complexity of the assembly process increases
Solution Approach 1:
The shim integrates both upper and lower recesses into a single component that simultaneously defines the positions of both discharge slots. This merging of positioning functions into one element simplifies the assembly process while maintaining high alignment accuracy between the two coating layers.
3Manufacturing precision
If separate positioning adjustments are made for upper and lower layers, then positioning precision is improved, but production efficiency decreases
Solution Approach 1:
The shim with recesses on both faces automatically self-aligns and self-positions the upper and lower die blocks when assembled. This self-service mechanism eliminates the need for operator intervention in positioning adjustments, thereby improving both precision and assembly efficiency simultaneously.
Data Source
AI summary
Provided is a coating die enabling coating of two layers of coating films stably. The coating die includes: a first block including a first manifold to receive a first coating liquid; a second block including a second manifold to receive a second coating liquid; and a shim sandwiched between the first block and the second block.