Double Head Low-E Film Deletion Machine
Double Head Low-E Film Deletion Machine
2026-02-26
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Double Head Low-E Film Deletion Machine: Technical Overview, Operational Principles and Industrial Applications
Abstract
The Double Head Low-E Film Deletion Machine is a high‑precision, high‑efficiency special equipment designed for removing the low‑emissivity coating along the edges of Low‑E glass. It adopts dual independent grinding heads, an intelligent CNC or PLC control system, pneumatic positioning, and an air‑flotation worktable to achieve synchronous, stable, and residue‑free edge deletion on two adjacent edges of glass sheets. This equipment is essential in the production of insulating glass, architectural glass, automotive glass, and energy‑saving glass, as it ensures reliable sealing, stable bonding, and long service life of final glass units. This article systematically introduces the definition, structural composition, working principle, core technical features, advantages, applications, operation, maintenance, and development trends of the double head Low‑E film deletion machine, providing a complete technical reference for glass deep‑processing enterprises.
1. Introduction
With the global promotion of green building and energy‑saving policies, Low‑E (low‑emissivity) glass has become the preferred material in modern construction, automotive, home appliance, and photovoltaic industries due to its excellent thermal insulation, light transmission, and UV protection performance. However, the metallic coating on Low‑E glass surface will seriously affect the bonding strength and sealing effect between glass and sealant, leading to risks such as degumming, air leakage, and hollow layer failure. Therefore, removing a certain width of the coating along the glass edge before sealing and tempering is an indispensable process.
Traditional manual film removal and single‑head deletion machines suffer from low efficiency, uneven deletion, residual coating, high labor intensity, and poor consistency. The double head Low‑E film deletion machine overcomes these shortcomings through dual synchronous heads, automatic positioning, and intelligent control. It can process two edges simultaneously, greatly improving production efficiency and product qualification rate. It has become core supporting equipment in automated glass processing lines.
2. Basic Definition and Classification
2.1 Definition
Double Head Low-E Film Deletion Machine is an automatic or semi-automatic mechanical equipment specially used to strip the low-emissivity coating layer from the edge of coated glass. It is equipped with two independently controlled or synchronously linked grinding heads, which can remove the film on two adjacent sides of glass at the same time. The deletion width, speed, and pressure are adjustable to adapt to different glass thicknesses, sizes, and coating types.
2.2 Classification
- By control mode: semi-automatic (manual feeding) and fully automatic (automatic sensing, conveying, and positioning).
- By structure: horizontal air-flotation type and vertical conveying type.
- By application: standard type for architectural insulating glass, high-precision type for automotive glass, multi-functional type compatible with single-silver, double-silver, and triple-silver Low-E glass.
- By grinding method: resin wheel grinding, diamond wheel grinding, and combined grinding system.
3. Structural Composition
The double head Low-E film deletion machine integrates machinery, electricity, pneumatics, and intelligent control. Its main components include:
3.1 Heavy-Duty Frame Structure
The frame is welded with high-strength steel and treated by stress relief, ensuring high rigidity, low vibration, and stable operation during long-term production. The stable structure guarantees precision and reduces glass damage caused by shaking.
3.2 Double Independent Grinding Head System
Two high-speed grinding motors drive special wear-resistant resin or diamond grinding wheels. The heads can move synchronously or independently, with adjustable height, pressure, and deletion width. They can process different glass thicknesses from 3 mm to 15 mm and ensure clean, scratch-free removal.
3.3 Air-Flotation Workbench
The workbench is equipped with high-pressure air nozzles to form a stable air cushion, allowing labor-free and low-damage movement of large glass sheets. It effectively reduces friction and edge breakage during feeding and positioning.
3.4 Pneumatic Clamping & Positioning System
Precision pneumatic cylinders fix the glass position automatically to avoid sliding during grinding. The positioning system ensures consistent deletion width and high dimensional accuracy.
3.5 Intelligent Control System
Equipped with PLC or CNC controller and touch screen, it supports one-key operation, parameter storage, deletion width setting, speed adjustment, and fault self-diagnosis. The human-machine interface is intuitive and easy to master.
3.6 Dust Collection & Environmental Protection System
A built-in vacuum dust collection device absorbs coating dust in real time, preventing dust pollution and protecting the health of operators. It keeps the workbench clean and improves working environment.
3.7 Safety Protection System
Equipped with emergency stop, safety grating, overload protection, and limit switches to ensure safe operation and prevent personal injury or equipment damage.
4. Working Principle
The working process of the double head Low-E film deletion machine follows a stable and efficient logic:
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Feeding & Positioning The operator places the glass on the air-flotation table and pushes it to the positioning area. The pneumatic system automatically clamps and fixes the glass sheet.
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Parameter Setting Set deletion width, grinding speed, and pressure on the touch screen according to glass thickness and coating type.
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Dual-Head Synchronous Deletion The two grinding heads start simultaneously and move along the glass edges to remove the Low-E coating completely and evenly.
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Automatic Stop & Unloading When deletion is finished, the heads return automatically. The air cushion starts again for easy unloading. For four-edge deletion, the glass is rotated 90 degrees for repeated processing.
The dual-head design doubles efficiency compared with single-head machines. The precise pressure control ensures no damage to the glass surface while removing the coating thoroughly.
5. Core Technical Characteristics and Advantages
5.1 High Efficiency & Double Productivity
Two grinding heads work at the same time, significantly reducing processing time. Fully automatic models can be linked with glass cutting lines and insulating glass production lines to realize continuous flow operation.
5.2 High Precision & Good Consistency
Deletion width can be adjusted from 5 mm to 50 mm with an error less than ±1 mm. The edge is clean and residue-free, which greatly improves the sealing quality and service life of insulating glass.
5.3 Wide Compatibility
Suitable for single-silver, double-silver, triple-silver Low-E glass, coated glass, reflective glass, and solar glass. Compatible with various glass sizes and thicknesses.
5.4 Low Breakage Rate & High Stability
Air-flotation table, soft clamping, and stable pressure control minimize glass scratch and breakage. The breakage rate is controlled below 0.3%.
5.5 Easy Operation & Low Labor Intensity
Intelligent touch screen control reduces professional skill requirements. Air flotation makes glass movement effortless, reducing operator fatigue.
5.6 Environmentally Friendly & Low Maintenance
Dust removal system ensures clean production. The grinding wheels have long service life and are easy to replace. The overall structure is simple with low failure rate.
6. Main Application Fields
6.1 Insulating Glass Production
The most important application: removing edge coating to ensure reliable bonding between glass and butyl rubber / structural sealant, preventing hollow glass failure.
6.2 Architectural Glass Processing
Used for curtain wall glass, doors and windows, skylights, and partition glass to meet building energy-saving and safety standards.
6.3 Automotive Glass
Edge treatment of automotive sunroofs, rear windshields, and side windows to ensure optical performance and sealing reliability.
6.4 Home Appliance & Photovoltaic Glass
Suitable for oven doors, refrigerator shelves, solar panels, and display glass, improving product durability and appearance.
7. Operation and Maintenance
7.1 Standard Operation
- Check power, air pressure, grinding wheels, and dust collector before startup.
- Set correct parameters according to glass type.
- Do not place hands near grinding heads during operation.
- Clean glass chippings and dust after shutdown.
7.2 Daily Maintenance
- Clean the workbench and dust collection box daily.
- Check air tightness of pneumatic components.
- Lubricate linear guides and transmission parts regularly.
- Replace worn grinding wheels to ensure deletion quality.
7.3 Regular Overhaul
Check motor current, control system, and positioning accuracy every 6–12 months. Replace aging wearing parts to extend service life.
8. Development Trend
8.1 Higher Intelligence
Future models will integrate AI visual recognition, automatic glass size detection, automatic coating identification, and remote monitoring for unmanned production.
8.2 Higher Integration
The machine will combine with loading, cutting, edging, and washing functions to form a fully automatic processing unit.
8.3 Greener & More Efficient
Energy-saving motors, optimized dust removal, and quieter design will meet environmental requirements.
8.4 More Specialized Customization
Special models for ultra-thin glass, large-size glass, and shaped glass will be developed to meet diversified market demands.
9. Conclusion
The Double Head Low-E Film Deletion Machine is key equipment in the modern glass deep-processing industry. It solves the problems of low efficiency and poor quality in traditional film removal processes, and guarantees the sealing performance, structural stability, and service life of Low-E glass products. With the rapid development of energy-saving buildings and automotive industries, the demand for high-quality coated glass will continue to grow, and the double head Low-E film deletion machine will become more intelligent, efficient, and integrated. For glass processing enterprises, choosing reliable double head film deletion equipment is an important way to improve product quality, reduce production costs, and enhance market competitiveness.
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