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How To Achieve Quality Control in Float Glass Production?

Views: 44     Author: Site Editor     Publish Time: 2024-04-30      Origin: Site

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Float glass production quality control


Quality control in float glass production is crucial to ensure that the final product meets the required standards. Here are some key steps to achieve quality control:


Float glass production


1. Raw material quality control  


The quality of float glass is directly affected by the quality of raw materials, so be extra cautious when selecting raw materials. For key minerals such as sandstone, dolomite, feldspar, etc., the raw material selection, mining, selection, processing, storage and other links must be strictly checked and controlled to ensure the quality standards of the raw materials entering the factory.


First, the raw materials used in glass production, such as silica sand, soda ash, limestone and other additives, need to be inspected to see if they meet specified quality standards and are free of impurities.


Secondly, it is necessary to ensure that the composition of the raw materials is stable so as not to affect the stability of the product.


2. Process control


Track various parameters and processes in the glass production process through real-time monitoring systems or regular inspections. This includes:


Temperature control: Temperature control of float glass involves multiple stages of float glass production, including Melting and Refining, Float Bath, Annealing Lehr, etc.


Temperature control impacts regulating viscosity, ensuring consistent color, and maintaining glass properties such as strength, durability, clarity, and chemical resistance in float glass production.


Precise temperature control not only improves product quality, but also optimizes energy consumption, reduces environmental impact, and supports sustainable production practices.


Melt control: Control the chemical composition and purity of the glass melt to eliminate quality problems caused by contamination.


Float speed and glass ribbon thickness control: The speed at which the molten glass moves across the surface of the molten tin in the float bath determines the thickness of the glass ribbon. Slower speeds generally result in thicker glass, while faster speeds produce thinner glass.


Inconsistencies in the uniform thickness and flatness of glass can cause defects in the glass, making it unsuitable for many of its applications.


Therefore, the equipment responsible for controlling the speed of the float tank and the gap between the rollers needs to be calibrated regularly to ensure accurate measurements.


3. Quality inspection at every stage


Quality inspection is performed at every stage of the production process. This includes:


1. Monitor the melting process of raw materials to ensure proper temperature control, efficient mixing of raw materials, and minimal impurities in the molten glass.


2. The glass ribbon is continuously inspected as it passes through the float tank to detect defects such as bubbles, scratches, and uneven thickness.


3. Check the glass for even cooling and stress relief as it passes through the annealing furnace, preventing internal defects and ensuring proper strength and durability.


4. During the cutting stage of float glass, the dimensions and surface quality of the glass sheets are checked to ensure that they meet specified requirements for thickness, flatness and edge quality.


4. Automated inspection system


Use automated inspection systems such as cameras and sensors to quickly and accurately detect defects in glass. These systems can identify issues such as bubbles, scratches, and uneven thickness.


5. Sampling and testing


Finished glass is regularly sampled and subjected to various tests to ensure that it meets the required specifications. This includes thickness, flatness, transparency and strength testing.


6. Calibration and maintenance


Regularly calibrate and maintain all equipment used in the production process to ensure accurate measurements and consistent performance. This includes calibrating temperature sensors, checking drum alignment and maintaining float tank cleanliness.


7. Employee training


Provide production personnel with comprehensive training in quality control procedures and techniques. This ensures that everyone involved in the process understands their roles and responsibilities in maintaining quality standards.


8. Continuous improvement


Implement a continuous improvement system that uses feedback from quality control inspections to identify areas in the production process that require optimization and enhancement.


By following these steps and implementing a comprehensive quality control system, float glass manufacturers can produce high-quality products that meet customer requirements and industry standards.







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