Digital Roller Mold Manufacturing via DMD Optical Projection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current roller printing manufacturing techniques face challenges in creating large-sized, seamless, and complex 3D micro-structures on roller molds, as they lack precision and mechanical stability, leading to defects such as gaps, notches, and bulges in the surface of the roller mold.
Innovation Solution
A digital roller mold manufacturing system comprising a projection module with a UV-LED illuminator, a Digital Mirror Device (DMD) chip, imaging lens, micro-lenses, and optical fibers, along with a control unit, which projects and focuses light energy onto a photo-resist layer on the roller to create precise patterns and micro-structures through controlled rotations and shifts, enabling seamless and scalable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional roller printing manufacturing techniques are used, then production speed is maintained, but manufacturing precision and surface quality deteriorate due to inability to create seamless large-sized complex structures
Solution Approach 1:
The patent replaces conventional mechanical roller manufacturing methods with a digital projection system using DMD chips and optical fibers to directly write micro-structures onto the roller mold surface. This substitution eliminates mechanical contact and assembly errors, achieving seamless large-sized complex structures with high precision while maintaining production efficiency
Solution Approach 2:
The patent uses digital mirror device (DMD) chips to create precise optical copies of the desired micro-structure patterns and transfer them onto the roller mold surface through focused light. This copying approach enables replication of complex 3D micro-structures with high fidelity without requiring complex mechanical tooling
2Area of stationary object
If conventional techniques are used to create large-sized structures, then area coverage is increased, but manufacturing precision deteriorates due to gaps, notches, and bulges
Solution Approach 1:
The patent segments the large roller mold surface into multiple zones covered by arrays of optical fibers, each fiber independently writing micro-structures. This segmentation allows parallel processing across large areas while maintaining uniform precision, eliminating gaps and notches that occur in conventional sequential mechanical methods
Solution Approach 2:
By replacing mechanical contact methods with optical writing through focused light from optical fibers, the patent eliminates mechanical errors such as notches and bulges. The non-contact optical approach ensures uniform surface quality across the entire large roller mold surface
3Adaptability or versatility
If conventional roller printing techniques are used, then existing manufacturing capabilities are maintained, but adaptability to complex patterns and 3D micro-structures is insufficient
Solution Approach 1:
The patent uses a dynamic control system where the DMD chip can rapidly reconfigure mirror orientations to write different micro-structure patterns, and the roller mold can rotate at variable speeds. This dynamic adaptability allows the same system to produce diverse complex patterns with high precision without requiring physical tooling changes
Solution Approach 2:
The digital mirror device enables precise copying of complex 3D micro-structure patterns by controlling light reflection angles. This optical copying approach can reproduce intricate patterns with high fidelity, adapting to various design requirements while maintaining micro-structure precision
4Productivity
If conventional techniques are used, then equipment simplicity is maintained, but productivity and precision for complex structures are insufficient
Solution Approach 1:
The patent implements continuous manufacturing by combining the rotating roller mold with continuous optical writing through arrays of optical fibers. The system maintains uninterrupted production flow, writing micro-structures continuously as the roller rotates, thereby increasing productivity while ensuring consistent pattern precision through controlled optical exposure
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
This system enables fast, precise, and scalable manufacturing of seamless roller molds with complex patterns and 3D micro-structures, overcoming the limitations of conventional techniques by ensuring high mechanical stability and surface quality, allowing for larger and more intricate designs without defects.
Implementation Method 1
The optical image is projected on the imaging lens and further on the first micro-lenses from the imaging lens by a specific magnification
Implementation Method 2
The first micro-lenses are aspheric micro-lenses arranged as a matrix; the first optical fibers are optical fibers arranged as a matrix; a first micro-lens matches a first optical fiber
Implementation Method 3
The digital light energy from the first optical fibers is received by the second optical fibers and transmitted to the second micro-lenses at which the digital light energy is focused as light spots
Implementation Method 4
The second micro-lenses are a plurality of line-up aspheric micro-lenses; the second micro-lenses relative to the roller are arranged horizontally
Implementation Method 5
The roller mold comprises a roller and a photo-resist layer at which light spots are received for development of patterns
Data Source
AI summary
A digital roller mold manufacturing system for manufacture of exterior characteristic structures on a roller mold depends on an illuminator for generation and projection of a light source on a Digital Mirror Device (DMD) chip in which micro-mirrors are rotated a controllable angle for defining the light source as an optical image and projecting the optical image on first micro-lenses at which digital light energy is transformed from the optical image and transmitted to first optical fibers, second optical fibers via couplers, and second micro-lenses. Furthermore, the second micro-lenses focus the digital light energy as light spots which are received by a photo-resist layer externally covered on the roller for development of patterns with exterior characteristic structures on the roller mold because a control unit regulates rotations of the roller and horizontal shifts of second micro-lenses.