Recently, a screening conveyor has been put into use in the SMT production lines of several electronic manufacturing enterprises. This equipment, with its features of precise sorting, continuous conveying and high degree of automation, has effectively solved the problem of automatic separation of OK boards and NG boards (qualified products and defective products) in the production lines, and has become an important tool for improving quality control efficiency and reducing manual intervention.
What is a screening conveyor?
The screening conveyor is a specialized peripheral equipment for the SMT surface mount production line. Its main function is to automatically screen and sort PCB circuit boards during the production process. It uses sensors or receives signals from upstream equipment (such as AOI, SPI) to automatically send qualified boards to the main water line and direct defective boards into separate channels or designated storage boxes, achieving real-time control of production line yield and automatic material diversion.
This equipment adopts a classic gray-green color industrial design. The upper part is equipped with multiple layers of Magazine storage racks, which can accommodate multiple PCBs simultaneously; the middle part is a green anti-static conveyor belt, and the lower part is equipped with a storage cabinet. The overall structure is compact and easy to move.
Main features
Precise filtering function: Supports automatic diversion of OK/NG signals, and can be connected to AOI, 3D inspection and other equipment signals.
Multi-layer Magazine storage: The top stainless steel rack can store multiple circuit boards, enabling continuous operation.
Green anti-static conveyor belt: The surface has moderate friction, protecting the PCB from being scratched or sliding.
Intelligent control system: Equipped with a touch screen and button panel, supporting manual/automatic/online multiple modes.
Stable structure: Bottom-mounted high-strength swivel wheels and fixed base cups ensure flexible movement and reliable positioning.
User-friendly design: Lower double-door storage cabinet for convenient storage of common tools and spare parts.
Core advantage
Compared with traditional manual sorting, the screening conveyor significantly reduces the risk of human error and improves sorting efficiency and accuracy. It can effectively prevent defective plates from flowing into the downstream process, reduces repetitive labor, and simultaneously enhances the automation level of the entire line. According to the feedback from the using enterprises, after introducing this equipment, the manual configuration at the rear end of the production line can be reduced by 1-2 people, and the quality traceability is also more convenient.
Typical application scenarios
Automatic sorting at the end of AOI and SPI inspection equipment in the SMT production line
Quality control links in production lines for consumer electronics, automotive electronics, communication equipment, etc.
Normal delivery of OK boards and isolation and buffering of NG boards
Flexible diversion requirements for small-batch, multi-variety mixed production lines
The wide application of this screening conveyor demonstrates that the peripheral equipment of SMT is continuously evolving towards the direction of "intelligence and automation", providing a practical and efficient solution for electronic manufacturing enterprises to promote the construction of intelligent factories.
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