Compressible Ejector with Protective Layer for Rotary Die Scrap Removal
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Solution Overview
Problem
Rotary cutting dies face challenges in effectively ejecting scrap material and stabilizing the product during the cutting process, leading to potential contamination of usable products and reduced throughput due to the limitations of existing ejector systems.
Innovation Solution
The cutting die system incorporates durable ejectors with a compressible portion and a protective layer, along with stabilizers and a product ejector made of rubber, which are designed to crush and separate scrap material while stabilizing the blank, reducing back folding, wrinkling, and false scoring, and enhancing the durability and speed of the cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ejectors are used to eject scrap material, then scrap removal is improved, but ejector durability deteriorates due to direct contact with scrap and product material
Solution Approach 1:
A protective layer is introduced as an intermediary between the ejector and the material being processed. This protective layer transfers the direct contact and mechanical stress from scrap and product material away from the ejector core, allowing the ejector to maintain its functional integrity while the protective layer absorbs the wear and degradation.
Solution Approach 2:
The ejector is constructed as a composite structure combining a durable core material with a protective surface layer. This composite design integrates the structural strength needed for ejector function with the wear resistance required for prolonged service life, creating a multi-functional component that addresses both scraping effectiveness and durability requirements.
2Productivity
If ejectors operate at high speeds to improve throughput, then productivity is improved, but ejector durability deteriorates due to increased wear and stress
Solution Approach 1:
The protective layer serves as a mediator that allows the ejector to operate at high speeds by absorbing the increased mechanical stress and wear that would otherwise directly affect the ejector core. This intermediary layer enables high-speed operation while protecting the ejector structure from degradation.
Solution Approach 2:
The protective layer modifies the surface parameters of the ejector, providing enhanced wear resistance and friction characteristics that allow the ejector to withstand high-speed operation. By changing the surface properties through the protective layer, the ejector can maintain structural integrity at elevated operating speeds.
3Duration of action of stationary object
If a protective layer is added to the ejector to improve durability, then ejector service life is improved, but device complexity increases
Solution Approach 1:
The protective layer is integrated directly into the ejector structure as a composite material layer rather than being a separate attachable component. This integration approach provides the durability benefits while minimizing structural complexity, as the protective layer becomes an inherent part of the ejector's manufacturing process rather than an additional assembly step.
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 enables efficient ejection of scrap material, improves product quality by reducing defects, and extends the useful life of the cutting die system by allowing higher operating speeds and increased durability of the ejectors.
Implementation Method 1
The ejector includes a compressible portion having a top surface and a bottom surface opposite the top surface
Implementation Method 2
a protective layer cured to the top surface
Implementation Method 3
The product ejector comprises a sheet of rubber that is positioned between the first stabilizer and the second stabilizer to contact a substantial portion of the usable product portion of the blank
Data Source
AI summary
Embodiments of the present disclosure generally provide a cutting die system. The cutting die system includes a substrate, at least one blade, and an ejector coupled to the substrate. The ejector includes a compressible portion having a top surface and a bottom surface opposite the top surface. The bottom surface is coupled to the substrate and a protective layer is cured to the top surface. A method of die cutting a blank according to an embodiment of the present disclosure includes directing a blank between a cutting die and an anvil, the cutting die comprising a substrate. An ejector coupled to the substrate is compressed between the cutting die and the blank. A scrap piece is cut from the blank as it passes between the cutting die and the anvil, and the scrap piece is ejected by releasing the compressed ejector.