Float Glass Dross Box Guide Member for Buffer Film Formation
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Solution Overview
Problem
In float-glass manufacturing, the inflow of an oxidizing atmosphere into the dross box can cause removing members to be oxidized and burned out, leading to flaws in the glass ribbon, while reducing the distance between the atmosphere-partitioning device and the glass ribbon can result in a disturbed sulfur oxide gas flow, inhibiting the formation of a buffer film on the glass ribbon.
Innovation Solution
A float-glass manufacturing apparatus with a dross box, annealing furnace, and gas ejection nozzle configuration, including first and second partitioning parts and a guide member, which maintains a reducing atmosphere in the dross box and ejects sulfur oxide gas to form a buffer film on the glass ribbon without interfering with the reducing atmosphere.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distance between the atmosphere-partitioning device and the glass ribbon is reduced to inhibit oxidizing atmosphere inflow, then the removing members are protected from burning out, but the sulfur oxide gas flow is disturbed and buffer film formation is inhibited
Solution Approach 1:
A guide member is introduced as an intermediary component between the atmosphere-partitioning device and the glass ribbon. This guide member has a specific shape that directs the sulfur oxide gas flow around it, ensuring the gas can reach the glass ribbon surface to form the buffer film while the atmosphere-partitioning device maintains its protective function. The guide member mediates between the conflicting requirements of atmosphere separation and gas flow delivery.
2Stability of the object's composition
If the atmosphere-partitioning device is positioned close to the glass ribbon, then the reducing atmosphere is maintained in the dross box, but the sulfur oxide gas ejection is interfered with
Solution Approach 1:
The guide member is designed with specific local geometric features that create different flow characteristics in different regions. The shape of the guide member is optimized to allow sulfur oxide gas to pass through or around it efficiently while maintaining the atmosphere barrier function in other regions. This local optimization resolves the conflict between atmosphere stability and gas flow efficiency.
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 configuration prevents the burning out of removing members in the dross box while enabling the formation of a buffer film on the glass ribbon, reducing flaws and maintaining a stable reducing atmosphere.
Implementation Method 1
a gas ejection nozzle which ejects a sulfur oxide gas from under the conveyance route toward the conveyance route
Implementation Method 2
a stream of a sulfur oxide gas which is being ejected toward the lower surface of the glass ribbon is disturbed to render a buffer film less apt to be formed on the lower surface of the glass ribbon
Data Source
AI summary
The present invention relates to a float-glass manufacturing apparatus including a float bath and a heat treatment furnace, in which the heat treatment furnace includes: a dross box including a plurality of lift-out rolls; an annealing furnace including a plurality of lehr rolls; a first partitioning part; a second partitioning part; a gas ejection nozzle; and a guide member.