Glass Ribbon Edge Gap Control via Velocity Adjustment
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Solution Overview
Problem
Existing methods for processing glass ribbons struggle to create a consistent gap between upstream and downstream severed edges during the roll-to-roll process, leading to potential damage and inefficiencies in glass product manufacturing.
Innovation Solution
A method involving traversing the glass ribbon at a predetermined velocity, severing it transversely to create upstream and downstream edges, and then adjusting the relative velocity between these edges by increasing or decreasing the speed of the downstream edge portion to create a gap, which can be facilitated by using accumulators to control the path length and velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the glass ribbon is severed during roll-to-roll processing, then the glass ribbon can be divided into segments for storage and processing, but the upstream and downstream severed edges may come into contact causing damage
Solution Approach 1:
The patent introduces a gap as an intermediary space between the upstream and downstream severed edges of the glass ribbon. This gap prevents direct contact between the edges, eliminating the harmful effect of edge damage while maintaining continuous roll-to-roll processing capability. The gap is created by controlling the relative positions of the severed edges through the processing system.
2Object-affected harmful factors
If the velocity of the downstream edge portion is increased to create a gap, then edge damage is prevented, but the process velocity control becomes more complex
Solution Approach 1:
The patent employs dynamic velocity control where the downstream edge portion is accelerated relative to the upstream edge portion to create and maintain the protective gap. This dynamic adjustment of velocity allows the system to adapt to different processing conditions while maintaining the gap, balancing edge protection with process simplicity.
3Manufacturing precision
If accumulators are used to control the path length and velocity of the downstream web, then consistent gap creation is achieved, but the device complexity increases
Solution Approach 1:
The patent utilizes accumulators to change the path length and velocity parameters of the downstream web, thereby achieving consistent gap creation. By adjusting these physical parameters through the accumulator mechanism, the system maintains precise control over the gap distance while managing the added device complexity through standardized components.
Data Source
AI summary
Methods of processing a glass ribbon are provided. The method includes the step of traversing the glass ribbon through a travel path at a predetermined velocity and severing the glass ribbon to create an upstream web and a downstream web. The method further includes the step of increasing a relative velocity of a downstream edge portion with respect to an upstream edge portion to create a gap between an upstream severed edge and a downstream severed edge. In other example methods, a segment of the glass ribbon is removed to create a gap between an upstream severed edge and a downstream severed edge. In still further example methods, an upstream severed edge is directed along a second travel path to create a gap between the upstream severed edge and a downstream severed edge.