Nanostructure Die for Seamless Roll Embossing
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Solution Overview
Problem
Current technologies face challenges in producing continuous nanostructured patterns in the submicron or nanometer range for large-area applications, particularly in roll-to-roll embossing processes, which are not adequately resolved for achieving reliable and reproducible results.
Innovation Solution
A nanostructure die and embossing roll system utilizing a step-and-repeat process for seamless embossing on the entire periphery of the roll, with a concavely curved die surface matching the embossing roll, allowing for continuous and precise application of nanostructures, and the use of deformation means like thermal expansion or piezomaterials for precise alignment and curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional embossing techniques are used for continuous production, then productivity is improved, but manufacturing precision deteriorates due to inability to produce seamless nanostructures
Solution Approach 1:
The embossing roll is divided into multiple sections, each embossed by a separate nanostructure die in a step-and-repeat process. This segmentation allows continuous production while maintaining precision through controlled sequential embossing of adjacent sections that are later joined seamlessly.
Solution Approach 2:
Multiple embossing sections are prepared and embossed in advance using the step-and-repeat process before final assembly. The preliminary embossing of individual sections enables continuous production while ensuring each section meets precise manufacturing requirements before being integrated into the continuous roll.
2Manufacturing precision
If nanostructure dimensions are reduced to submicron or nanometer range, then manufacturing precision is improved, but device complexity increases due to technical challenges in continuous application
Solution Approach 1:
The complex task of continuously embossing nanostructures is segmented into multiple manageable embossing steps, each handling a specific section of the roll. This segmentation reduces the complexity of each individual embossing operation while enabling continuous production of submicron and nanometer-scale structures.
Solution Approach 2:
The step-and-repeat embossing process uses periodic action where the embossing die systematically returns to emboss adjacent sections in a repeating cycle. This periodic operation simplifies the control of continuous nanostructure embossing by breaking down the complex continuous process into manageable repeating steps.
3Manufacturing precision
If step-and-repeat process is used for peripheral embossing, then manufacturing precision is improved for seamless structures, but productivity decreases due to multi-step process
Solution Approach 1:
The peripheral embossing is segmented into multiple adjacent sections that can be embossed in sequence. By preparing multiple embossing sections in advance and then joining them, the process achieves seamless peripheral structures while maintaining productivity through parallel preparation of multiple sections.
Solution Approach 2:
Multiple embossing sections are prepared in advance using the step-and-repeat process before final assembly. This preliminary action allows the embossing cycle to be optimized by preparing sections in parallel, reducing the overall cycle time while maintaining seamless peripheral structures.
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
Enables the production of materials with unique surface properties and precise optical effects by ensuring seamless and homogeneous embossing across the entire periphery, suitable for large-area applications like glass plates, with the ability to produce nanostructures continuously and reproducibly.
Implementation Method 1
a concavely curved nanostructured die surface for seamless embossing of at least one peripheral ring of a jacket surface of an embossing roll
Implementation Method 2
the use of deformation means like thermal expansion or piezomaterials for precise alignment
Implementation Method 3
the use of deformation means like thermal expansion or piezomaterials for precise alignment
Implementation Method 4
curing of the die form and/or of the embossing layer of the embossing roll
Data Source
AI summary
A nanostructure die with a concavely curved nanostructured die surface for seamless embossing of at least one peripheral ring of a jacket surface of an embossing roll in a step-and-repeat process and an embossing roll for continuous embossing of nanostructures with an embossing layer, which has been applied on a body of revolution, with a jacket surface with at least one peripheral ring which is made seamless at least in the peripheral direction and which is embossed in the step-and-repeat process. Furthermore, the invention relates to a method and a device for producing such an embossing roll for continuous embossing of nanostructures as well as a method for producing such a nanostructure die and a method for producing an embossing substrate.