Uniform-Cross-Section Score Die for Durable Can-End Scoring
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Solution Overview
Problem
The existing score dies for forming can ends are difficult to create uniformly, wear out quickly, and coatings applied to them tend to degrade due to non-uniform surfaces, leading to faster degradation and imperfections in the score lines.
Innovation Solution
A score die with a score blade having a substantially uniform cross-section, machine-smoothed surfaces, and a thin coating that adheres well, formed using a score die forming system involving machining and heat treatment to ensure consistency and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional score dies are manufactured with hand-polished surfaces, then the score blade can be created, but the surface is non-uniform causing coating degradation and quick wear
Solution Approach 1:
The patent replaces the traditional hand-polishing mechanical process with a coating application process. Instead of mechanically smoothing the score blade surface to achieve uniformity, the invention applies a specialized coating that adheres to the score blade and provides the necessary surface uniformity for consistent scoring performance and extended durability.
Solution Approach 2:
The patent uses a composite structure consisting of the score die body with a score blade that has a applied coating. This composite material approach combines the structural integrity of the score die with the surface properties of the coating material, creating a unified component that achieves both manufacturability and precision.
2Ease of manufacture
If coatings are applied to non-uniform score blade surfaces, then coating coverage is achieved, but the coating degrades quickly due to surface imperfections
Solution Approach 1:
The patent applies the coating to the score blade surface as a preliminary action during the manufacturing process, before the score die is put into service. This ensures that the coating is applied to a controlled surface state and establishes a durable foundation that prevents subsequent coating degradation during operation.
Solution Approach 2:
The patent changes the surface parameters of the score blade by applying a coating with specific adhesion and uniformity properties. This parameter change transforms the surface characteristics from non-uniform and prone to degradation to uniform and coating-stable, directly addressing the reliability issue.
3Ease of manufacture
If score blades are made with varying cross-sections, then manufacturing is simpler, but performance consistency deteriorates over time
Solution Approach 1:
The patent applies the coating specifically to the score blade surface, creating a localized quality enhancement. The coating is applied where it is most needed - on the scoring surface - to ensure uniform score line performance, while the rest of the score die body maintains its structural design for ease of manufacture.
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 results in a score die with uniform score blades that maintain their shape and coating integrity, reducing wear and tear and ensuring consistent performance over time.
Implementation Method 1
heat treating the score die blank to harden the score blade
Data Source
AI summary
A score die including a body with a generally planar first surface. The first surface includes a score blade. The score blade has a number of cutting portions, and, each cutting portion has a substantially uniform cross-section.