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Why Is Cold End Equipment So Important in Float Glass Production Line?

Views: 16     Author: Site Editor     Publish Time: 2023-12-21      Origin: Site

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This article will introduce the structure of the cold end equipment in the float glass production line and its significance to production efficiency and production quality.


What is cold end equipment in float glass production line?

The cold end equipment in a float glass production line refers to the section where the glass sheets undergo final processing and handling after the initial stages of formation and cooling. This crucial phase involves various specialized machinery and processes designed to meet specific quality, size, and application requirements.


Following the completion of the primary float glass manufacturing process, the cold end equipment includes cutting and breaking systems for sheet sizing, edge deletion processes to enhance edge quality, cleaning mechanisms to remove contaminants, inspection systems for defect detection, and packaging equipment for efficient shipment.


Additionally, depending on the intended applications, the cold end may encompass further processes such as laminating, coating, heat treatment, and decorative enhancements to tailor the glass sheets for specific functionalities and safety standards. The cold end plays a pivotal role in ensuring that the final glass products meet stringent quality standards before reaching end-users.


Importance of cold end equipment in float glass production line

The cold end equipment in a float glass production line plays a pivotal role in maintaining the quality of the final product and improving overall efficiency.


Quality Maintenance

1.Cold end equipment in float glass production line, such as glass belt conveyors and slicing devices, ensures the careful and precise movement of glass ribbons.


This precision is critical for preventing damage, scratches, or any defects that could compromise the quality of the glass.


2.Quality inspection devices, including stress detection, thickness measurement, and defect detection, integrated into the cold end equipment, contribute to identifying and rectifying any imperfections in the glass. This proactive approach helps in maintaining a consistently high level of quality.


3.Surface protection devices, like anti-mold liquid application and electrostatic paper spreading, safeguard the glass against scratches and other surface flaws. This not only preserves the aesthetic appeal of the glass but also ensures it meets stringent quality standards.


Efficiency Improvement

1.The cold end equipment streamlines the various processes involved in post-annealing, from cutting and breaking to stacking and packing. This seamless integration optimizes the production workflow, reducing downtime and improving overall operational efficiency.


2.Through accurate cutting and precise handling, the cold end equipment minimizes waste by ensuring that each glass piece meets the required specifications. This not only contributes to cost-effectiveness but also aligns with sustainable manufacturing practices.


3.Modern cold end equipment often features electronic computer distributed control systems that automate and coordinate the entire production line. This automation reduces the likelihood of human errors, enhances process consistency, and contributes to increased efficiency.


4.Equipment designed for quick changeovers in the processing of different glass specifications allows for greater flexibility in production. This adaptability improves efficiency by minimizing downtime during transitions between product runs.


Overall Production Benefits

1.The meticulous handling and inspection provided by the cold end equipment contribute to lower defect rates. This not only meets quality standards but also reduces the need for rework or the scrapping of defective products, optimizing resource utilization.


2.By ensuring a smooth flow of glass from the annealing kiln through various processing stages, the cold end equipment supports a consistent and higher output. This is crucial for meeting market demand and maintaining a competitive edge in the glass manufacturing industry.


Composition of float glass cold end


1. Conveying Equipment for Glass Ribbons in Float Glass Production Line

In the Float glass production line, conveying equipment is essential for the seamless transport of glass ribbons or plates through various stages after leaving the annealing kiln. This equipment includes conveying wheels, belts, negative pressure suction cups, air cushions, and other specialized devices. The purpose is to facilitate a series of crucial processes, including inspections, cutting, breaking, slicing, re-cutting, surface protection, and stacking or packing. Here are key components:


(1) Glass Belt Conveyor

The glass belt conveyor guides the glass ribbon's path from the annealing kiln to lateral breaking. This section of the mixing tunnel is equipped with emergency cutting, falling plate mixing, stress detection, thickness measurement, plate edge position tracking, pulse detection of glass running speed and distance, washing and drying, point defect detection, and longitudinal and transverse cutting and breaking disconnect equipment.


(2) Slice Conveying Device

This device distributes glass plates running on the main line transversely to each branch line for further processing, including cutting, breaking, surface protection, and garbage disposal.


2. Cutting and Breaking Devices for Glass Ribbons

Various cutting and breaking devices play a vital role in processing glass ribbons or plates:


Emergency cross-cutting machines

Slitting machines

Cross-cutting machines

Transverse breaking devices

Edge breaking devices

Longitudinal breaking and slicing devices

Scrap plate drop-off devices


3. Quality Inspection Devices

Quality assurance is maintained through detailed inspection devices:


(1) Stress Detection Device


(2) Glass Ribbon Thickness Measuring Device


Measures thickness variations along the glass ribbon to address optical distortion concerns.


(3) Online Board Edge Position Detection Device


(4) Point Defect Detection Device


Identifies defects such as sand, slag inclusions, tin stains, and bubbles.


4. Surface Protection Devices

Various devices are implemented to protect the surface of high-quality float glass:


Device for spraying anti-mold liquid

Electrostatic paper spreader and powder spraying device

Use of air cushion transportation

To combat scratches and mold at the cold end, additional measures include applying antifungal agents, laying paper, spraying powder, and utilizing fast and slow mixing channels and air cushion transportation before and after transverse breaking.


5. Glass Plate Quasi-Stacking and Boxing Equipment

Equipment for stacking and boxing glass plates includes a stacker with a boom, tractor, and rotating bracket. Two types of stackers, vertical and horizontal, offer different advantages in terms of ease of operation, cost, and maintenance. Vertical stacking is preferred for reducing scratches and damage, especially for small and medium-sized glass sheets.


6. Changing and Cutting Lines for Large and Medium-Sized Pieces

Specialized equipment for handling large and medium-sized glass pieces includes vertical and horizontal changing cutting tables, breaking devices, falling plates, and reversible stacking and picking machines.


7. Electronic Computer Distributed Control System

The entire line of equipment at the cold end is controlled by an advanced electronic computer distributed control system, ensuring seamless coordination and efficient operation.


About US - Professional glass production line manufacturer

Nanjing Baisheng Glass Technology Co., Ltd. is a global glass technology equipment engineering system integration service provider situated in the Airport Science & Technology Industrial Park, Nanjing. The company excels in offering comprehensive "one-stop" system integration services encompassing glass engineering R&D, construction, equipment manufacturing, commissioning, and production operations. Over its 15-year history, the company has amassed advanced technology and expertise in constructing glass factories, repairing melting furnaces, furnace heat-up, and manufacturing equipment for glass production lines.


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