Quartz Coating Flame Stabilization Using an Airflow Control Plate
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Solution Overview
Problem
Existing methods for coating quartz members on base materials face challenges such as irregular flame flickering, inconsistent heat input, and non-uniform coating due to upward airflow interference, particularly when coating inner surfaces with complex shapes.
Innovation Solution
The installation of an airflow control plate within a specific angular range relative to the burner axis, combined with controlled gas supply and silica powder application, stabilizes the flame and ensures uniform coating by suppressing upward airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If thermal spray coating is performed on inner surface of coating target quartz member, then coating can be applied to complex shapes, but upward airflow interferes with flame causing irregular flickering and non-uniform coating
Solution Approach 1:
An airflow control plate is introduced as an intermediary component between the burner and the coating target. This plate redirects the upward thermal airflow away from the flame zone, mediating the interaction between heat source and coating surface to eliminate flame instability while preserving the ability to coat complex geometries
2Temperature
If quartz powder is supplied through center of oxyhydrogen flame, then coating material is heated, but turbulence causes powder to attach at shifted positions and generates unmolten residue
Solution Approach 1:
The harmful turbulent airflow is extracted or removed from the flame zone by the airflow control plate. This eliminates the cause of powder attachment errors and unmolten residue, while the controlled thermal field remains intact for proper heating of coating material
3Reliability
If coating is performed to regenerate quartz member with reduced thickness, then member purity is improved, but flame stability is compromised by upward airflow
Solution Approach 1:
The airflow control plate serves as a mediator that stabilizes the flame conditions during coating regeneration processes, ensuring consistent heating for high-purity quartz member production while maintaining the coating capability needed for thickness restoration
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 approach results in a stable burner flame and the formation of a transparent, dense coating film, even on curved surfaces, by minimizing airflow interference and ensuring consistent heat distribution.
Implementation Method 1
an airflow control plate for suppressing inflow of an upward airflow (thermal airflow) into a flame below a burner
Implementation Method 2
a fire processing step of applying heat with a burner to a surface of a processing target member containing quartz
Implementation Method 3
a treatment of spraying a silica powder onto the surface of the processing target member while melting the silica powder to perform coating
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3
AI summary
Provided are a method for producing a quartz member, a quartz member coating device, and a method for regenerating a quartz member, which are capable of suppressing disturbance of a flame emitted from a burner when quartz coating is performed on a base material. Provided is a method for producing a quartz member, the method including a fire processing step of applying heat with a burner to a surface of a processing target member containing quartz, wherein, in the fire processing step, an airflow control plate is installed within a range of ± 45° with respect to a position parallel to an axis of the burner as a reference.