Quartz Member Coating With Airflow Plate Flame Stabilization

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Solution Overview

Problem

Existing methods for coating quartz members face challenges in stabilizing the oxyhydrogen flame due to interference from upward airflow, leading to irregular heat input, unmolten residues, and non-uniform coating, particularly when coating angled or curved surfaces.

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 flame direction, stabilizes the flame and ensures uniform coating by suppressing upward airflow interference.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If thermal spray coating of quartz glass is performed using oxyhydrogen flame, then coating can be applied to regenerate quartz members, but upward airflow interferes with the flame causing irregular heat input and non-uniform coating

Engineering Contradiction:

Improvecoating uniformityVSAvoidflame stability

Core Design Contradiction:

Manufacturing precisionVSStability of the object's composition

Solution Approach 1:

A airflow control plate is introduced as an intermediary component between the upward airflow and the oxyhydrogen flame. This plate blocks and redirects the upward airflow, preventing it from directly interfering with the flame structure, thereby maintaining flame stability while allowing the coating process to proceed

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the spatial configuration parameters by positioning the airflow control plate at specific distances and angles relative to the burner. By adjusting these geometric parameters, the system optimizes the blocking effect on upward airflow while maintaining appropriate heat input for effective coating

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If coating is performed on angled or curved surfaces, then regeneration of quartz members with reduced thickness is achieved, but flame disturbance increases causing unmolten residues and non-uniform coating

Engineering Contradiction:

Improvecoating applicability to various surfacesVSAvoidcoating uniformity

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The airflow control plate serves as a mediator that creates a more stable flame environment suitable for coating angled and curved surfaces. By blocking upward airflow, the plate prevents flame distortion that would otherwise occur on non-flat surfaces, enabling uniform coating even on complex geometries

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If raw material quartz powder is supplied through the center of the oxyhydrogen flame, then coating material is delivered to the target place, but flame turbulence causes attachment at shifted positions resulting in portions that cannot receive necessary heat

Engineering Contradiction:

Improvecoating efficiencyVSAvoidcoating position accuracy

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The airflow control plate acts as a mediator that stabilizes the flame structure and reduces turbulence. This stabilization ensures that quartz powder supplied through the flame center remains on track and reaches the correct target position, preventing displacement caused by flame distortion

Inventive Principle:

Principle #24Intermediary (Mediator)

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 transparent and dense coating film, effectively suppressing flame flickering and ensuring uniform application on both flat and curved surfaces.

Implementation Method 1

a fire processing step of applying heat with a burner to a surface of a processing target member containing quartz

Methodology Applied

Scientific EffectHeating: Heating

Implementation Method 2

a treatment of spraying a silica powder onto the surface of the processing target member while melting the silica powder to perform coating

Methodology Applied

Scientific EffectMelting: Melting

Implementation Method 3

suppressing inflow of an upward airflow (thermal airflow) into a flame below a burner

Methodology Applied

Scientific EffectConvection: Convection

Implementation Method 4

heated air generates an upward airflow

Methodology Applied

Scientific EffectThermal airflow: Free Convection

Implementation Method 5

a fire processing step of applying heat with a burner to a surface of a processing target member containing quartz

Methodology Applied

Scientific EffectCombustion: Combustion

Data Source

PatentUS20260022445A1Method for producing quartz member, device for coating quartz member, and method for regenerating quartz member

Publication Date: 2026.01.22 MITSUBISHI CHEM CORP

AI summary

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. The method for producing the quartz member includes a fire processing involving applying heat with a burner to a surface of a processing target member containing quartz. In the fire processing, 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.