Multi-Slot Die Coater Assembly for Stable Slot Gap Alignment
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Solution Overview
Problem
Conventional slot die coaters face challenges in uniformly coating electrode active material layers due to structural vulnerability to deformation and twist, particularly when forming multiple layers, which affects thickness consistency and productivity.
Innovation Solution
A multi-slot die coater design with specific bolt fastening angles and spacers to minimize deformation and twist, ensuring uniform coating by aligning die blocks and maintaining consistent slot gaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple die blocks are assembled to form multiple slots for simultaneous multi-layer coating, then productivity is improved, but the die blocks become vulnerable to deformation and twist
Solution Approach 1:
The die assembly is divided into multiple separate die blocks (first die block, second die block, third die block) that can be independently manufactured and then assembled together to form multiple slots. This segmentation allows each block to be optimized for structural stability while collectively achieving multi-layer coating capability, resolving the contradiction between productivity improvement through multiple slots and structural stability of individual blocks.
2Manufacturing precision
If the slot gap is adjusted to achieve desired coating thickness, then manufacturing precision is improved, but the slot gap is sensitive to fastening strength and may change during operation
Solution Approach 1:
Spacers are pre-installed between the die blocks to establish and maintain the desired slot gap before the coating process begins. This preliminary action of setting the gap with spacers ensures that the coating thickness is controlled from the start, and the gap remains stable during operation because the spacers physically maintain the spacing regardless of fastening strength variations.
3Device complexity
If the die blocks are made thinner to reduce overall device size, then device complexity is reduced, but the die blocks become more vulnerable to deformation and twist
Solution Approach 1:
Multiple thin die blocks are merged together through precise assembly with spacers and fasteners to form a combined structure that achieves the desired compact overall size while the collective assembly provides the structural strength and rigidity that individual thin blocks would lack. The merging of multiple blocks compensates for the weakness of each individual thin block.
Data Source
AI summary
Provided is a multi-slot die coater with reduced structural vulnerability to deformation and twist in the multi-slot die coater basically including three die blocks. The multi-slot die coater according to the present disclosure is a multi-slot die coater including a first slot and a second slot to extrude and coat a coating solution on a surface of a continuously moving substrate through at least one of the first slot or the second slot, and includes a first outer die block, an intermediate die block and a second outer die block. The multi-slot die coater includes a bolt fastened at contact surfaces between the first outer die block, the intermediate die block and the second outer die block, the bolt being at such an angle that a bolt head faces a first exit port and a second exit port.