Self-Sealing End Seal Insert to Block Ink and Solvent Ingress
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Solution Overview
Problem
Existing seals in flexography printing are difficult to adjust, have limited life due to ink and solvent exposure, and rely on adhesives that degrade, leading to delamination and reduced reliability.
Innovation Solution
A self-sealing end seal with a flexible body and a stiffer insert, where the insert is forced into the body upon engagement with the anilox roller, preventing ink and solvent accumulation, and using protruding posts instead of adhesives for mechanical connection, reducing manufacturing costs and enhancing durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing seals use adhesives to connect the insert to the body, then the seal can be assembled, but the adhesive degrades due to ink and solvent exposure, leading to delamination and reduced reliability
Solution Approach 1:
The invention removes the adhesive layer from the seal structure, replacing it with a mechanical connection system. The insert is designed with protrusions that fit into corresponding recesses in the body, creating a direct mechanical bond that eliminates the failure point of adhesive degradation from ink and solvent exposure.
Solution Approach 2:
The protrusions and recesses act as intermediary mechanical features that transfer and distribute the connection forces between the insert and body. This mechanical intermediary replaces the chemical intermediary (adhesive), providing a connection method that is resistant to chemical degradation from ink and solvent environments.
2Ease of manufacture
If the insert is recessed into the body, then the assembly is complete, but this creates a reservoir that accumulates ink and chemicals, damaging the seal and shortening its life
Solution Approach 1:
Instead of recessing the insert into the body as in conventional seals, the invention inverts the arrangement by having the insert protrude from the body. This inversion eliminates the creation of ink-trapping reservoirs while maintaining proper sealing function, as the protruding insert configuration prevents liquid accumulation in the connection area.
3Ease of operation
If existing seals are designed with complex adjustment mechanisms, then they can be adjusted, but they are difficult to properly adjust and require more complexity
Solution Approach 1:
The seal is divided into distinct modular components: the body with integrated sealing features and the insert with positioning protrusions. This segmentation allows each component to be optimized independently and assembled through simple alignment of the protrusions with recesses, eliminating complex adjustment mechanisms while maintaining ease of proper installation.
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 self-sealing end seal effectively prevents ink and solvent ingress, extending its lifespan and reducing maintenance complexity, while avoiding adhesive-related issues, thus improving the reliability and longevity of the seal.
Implementation Method 1
a flexible, or compressible body
Implementation Method 2
The body is preferably formed from a resilient material
Implementation Method 3
The insert, when under pressure, seals the holes in the body
Data Source
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AI summary
The end seal with self-sealing insert includes a flexible, or compressible body, and a stiffer insert to reduce wear caused by the rotating anilox roller. The end seal with self-sealing insert places the recesses within the body beneath an expanded insert. The insert, when under pressure, seals the holes of the body, preventing introduction and accumulation of solvents. The result is a degradation-resistant end seal. By having extensions, also referred to as posts or legs, protruding from the insert that pass into the body, the reliance on adhesives is avoided. The reduction of the use of adhesives is helpful because adhesives are sensitive to solvents used in ink and to cleaning solutions. In the preferred embodiment, circular posts extend downward from the insert, passing into circular holes in the body.