Electrode Plate Slitter Knife Geometry for Low-Dust Cutting
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Solution Overview
Problem
Existing slitters generate foreign substances like dust during the cutting process of electrode plates, leading to defects in the manufacturing of electrodes.
Innovation Solution
The slitter design includes an upper knife with an inclined inner surface and a second inner surface, reducing contact area and minimizing dust generation by spacing the knives apart, while maintaining sharp cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the upper knife and lower knife are disposed in close contact to cut the electrode plate, then the cutting sharpness is improved, but foreign substances such as dust are generated and attached to the knives
Solution Approach 1:
The patent introduces a new spatial dimension by inclining the inner surface of the upper knife relative to the lower knife, transforming the traditional parallel close-contact configuration into a multi-dimensional arrangement. This inclination creates a gradient contact pattern where the knives touch at specific points rather than across a broad surface, reducing dust generation while preserving cutting sharpness at the contact points
Solution Approach 2:
The patent applies local quality by creating different contact characteristics at different locations of the knife surfaces. The inclined inner surface ensures that only specific local regions of the upper knife contact the lower knife, concentrating the cutting action at precise points while minimizing overall contact area and thus reducing dust generation across the entire knife interface
2Object-generated harmful factors
If the contact area between upper knife and lower knife is reduced to minimize dust generation, then dust attachment is decreased, but cutting effectiveness may be compromised
Solution Approach 1:
The patent employs dynamics by utilizing the rotational motion of the knives to maintain effective cutting with reduced static contact area. The rotation ensures that fresh surfaces continuously engage the electrode plate, compensating for the reduced contact area and maintaining cutting effectiveness while minimizing dust attachment that would occur with larger stationary contact regions
Solution Approach 2:
The patent applies curvature principles through the inclined inner surface geometry, which creates a progressive contact pattern. This curved/angled surface design allows the knife edges to engage the electrode plate in a controlled manner, concentrating cutting forces at specific points while reducing overall contact area, thereby minimizing dust attachment without sacrificing cutting effectiveness
Data Source
AI summary
A slitter according to an embodiment of the present art includes: an upper knife disposed above the electrode plate to rotate, thereby cutting the electrode plate; and a lower knife disposed below the electrode plate to partially overlap the upper knife and rotate, thereby cutting the electrode plate together with the upper knife, wherein the upper knife includes: a first inner surface extending to be inclined from a tip formed at the lowermost end to the lower knife; and an outer circumferential surface extending to be inclined from the tip to an opposite side of the lower knife, wherein the first inner surface has an inclination at a first angle from a vertical line V that is perpendicular to a rotation axis that serves as a rotation center of the upper knife, and the outer circumferential surface has an inclination at a second angle from the vertical line.