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Your tempering furnace is the heartbeat of your factory. To maximize energy efficiency, you load the bed based on glass thickness and size ("Furnace Optimization"). But your IGU line needs glass based on order sequence ("Assembly Optimization"). |
In a high-efficiency plant, the glass coming out of the quench (cooling section) is rarely in the order needed for the next step. You might have ten pieces of 6mm glass for five different jobs mixed together.
Using numbered harp racks immediately after the unloading table transforms this chaos. Operators can read the laser mark or label on the glass and slot it directly into the corresponding rack number (e.g., Job A goes to Rack 1, Slots 1-10). This "micro-sorting" happens instantly during the unloading process, turning a pile of glass into an organized queue ready for the IGU line.
Visual cues: Use distinct colored racks (like yellow) to designate "Hot/Tempered" workflows.
Glass exiting the furnace is stable but can still retain residual heat. Tightly stacking glass sheets face-to-face (as done on A-frames) can trap heat in the center of the pack, potentially causing "thermal shock" issues or affecting the curing of spacers if assembled too quickly.
The separated slot design of a harp rack ensures natural airflow around every single sheet. This facilitates even cooling to ambient temperature before the glass reaches the butyl extruder or digital printer, ensuring process consistency and quality control.
The moment glass leaves the furnace rollers, it is most vulnerable to edge damage. Impacting a hard steel surface can cause "clamshell" chips that weaken the tempered glass, leading to spontaneous breakage later.
Our racks feature high-impact PVC or Nylon base liners. When an operator slides the glass off the table and into the rack, the edge meets a shock-absorbing material, not bare metal. This simple feature significantly reduces the rejection rate at the very end of the value chain.
Individual slots allow operators to re-sequence glass without double-handling.
Yes, provided the glass has passed through the quench and cooling section and is safe to touch (typically below 60°C). The PVC/Nylon components are rated for industrial temperatures well above standard handling limits.
It eliminates "search time." When the rack arrives at the IGU line, the glass is already sorted (Inner Lite in Slot 1, Outer Lite in Slot 2). The robot operator simply feeds them in order, maintaining continuous machine uptime.
The base rollers or liners are made from durable engineering plastics. While not designed for red-hot glass, they are perfectly suitable for the "warm" glass typically handled at the unloading station.
Absolutely. The universal design allows the rack to travel the entire loop: Cutting -> Edging -> Tempering -> IGU. This reduces the need to transfer glass between different types of carts.
Harp racks are faster to load than A-frames because there is no strapping or balancing required. Operators can slide glass in as fast as the conveyor runs, making them ideal for high-speed continuous furnaces.
