Keeping Single-Faced Board Flat: Suction-Brake Tension Control on a Bridge Conveyor

Single-faced board does not always travel politely. If tension is uneven, it can wander, wrinkle, or arrive at the preheater in poor condition. That is why tension control is one of the most useful features of a modern overhead bridge conveyor.

Hsieh Hsu’s bridge conveyor uses a suction-brake device that holds the board flat. Board tension is controlled by a pneumatic system and can be adjusted. The company’s product description highlights precise pneumatic tension control as a key feature of the series.

Why a pneumatic system? Compressed air offers smooth, adjustable control and is already present in most corrugating plants. Operators can change the setting to suit different boards and conditions, and a consistent setting helps the board stay stable as it moves.

When you evaluate a bridge conveyor, ask how tension is adjusted, where the controls are located, and what air supply the system needs. Ask also how operators record settings for different board types, so good results can be repeated.

Tension control will not fix every problem on the line, but a stable transfer between the single facer and the preheater removes one common source of variation.
https://www.hsiehhsumachinery.....com/overhead-bridge-

Why the Overhead Bridge Conveyor Matters for Board Quality and Line Stability

It is easy to overlook the conveyor between two machines, because it doesn’t form flutes or apply glue. But the single-face web has to be handled carefully on its way from one stage to the next, and the conveyor is where that happens. A poorly performing transfer system can introduce wrinkles, misalignment or damage that later machines then have to deal with. Hsieh Hsu Machinery’s overhead bridge conveyors are designed for efficient paper transfer, supporting smooth sheet conveying and stable production in corrugated cardboard lines. A stable transfer stage benefits the whole line. Downstream equipment receives the web in a more consistent condition, operators spend less time on corrective adjustments, and production planning becomes more predictable. The overhead layout also keeps floor space clear, which helps with access and safety around the line. When you evaluate a corrugator investment, it is worth looking at every link in the chain, not only the headline machines. Asking how the bridge conveyor is designed, which models are available and how it integrates with the rest of the line can reveal a lot about overall line quality. Contact Hsieh Hsu to discuss your requirements, and we will help you choose a conveyor that supports stable, consistent production.
https://www.hsiehhsumachinery.....com/overhead-bridge-

N.C. Helical Cut-Off (Double Drive) — Precision Cutting for Corrugated Board Lines

The N.C. Helical Cut-Off (Double Drive) from Hsieh Hsu Machinery is engineered for high-speed corrugated board production, delivering precise sheet cutting, stable operation, and efficient order changes on modern corrugator lines. Installed directly after the N.C. Slitter Scorer, the machine accurately cuts corrugated sheets to the required length before transferring them to the downstream stacking system, keeping the entire production flow continuous and synchronized.

Available in three configurations — NC-C110H, NC-C128H, and NC-C158H — the series offers multiple performance tiers to match different production capacities while maintaining consistent cutting accuracy of ±1.0 mm across all models. Powered by a double AC servo drive system, the machine achieves stable transmission and accurate synchronization even at demanding production speeds, while dual measuring wheels support precise length control and fast order switching, with storage for up to 99 production orders.

Built around a lightweight hollow blade shaft and helical blade structure, the design reduces cutting resistance, improves transmission efficiency, and extends blade service life. Combined with quick blade removal and reverse grinding support, the N.C. Helical Cut-Off is built for manufacturers who need dependable, long-term cutting performance without sacrificing production speed or accuracy.
https://www.hsiehhsumachinery.....com/n-c-helical-cut-

Inside the DF-12's Heating System: How It Keeps Board Bonding Consistent
Heat consistency is what separates a reliable double backer from one that produces uneven, weak bonds — and it's the core of the DF-12's design. The unit runs 12 to 22 heating plates depending on line configuration, each 150mm in height with ground-polished, chrome-plated surfaces built to release heat evenly across the full board width. Above each plate sit five to six weight rollers, with lift and lower motion handled hydraulically and contact pressure fine-tuned pneumatically — giving operators two separate, adjustable controls rather than one fixed setting for heat transfer and mechanical pressure. In the dedicated heating section, thin-type steel hot plates measuring 120mm (H) × 600mm (W) × 2650mm (L) are arranged across 20 plates, backed by a hydraulic press-shoe unit and three-section steam pressure control. A 15-inch channel steel main frame keeps the whole assembly rigid under continuous heat and pressure. For plants running single or double wall board, that level of independent control is what keeps bonding quality steady from the first sheet to the last.
https://www.hsiehhsumachinery.....com/double-backer-df