The Stahlfolder TH 82-P has reinvented folding. Running at speeds greater than 16,000 sph, it is the first folder to match the output of the printing presses it supports. While a linear speed of 160 meters per minute (525 fpm) typically yields 8,500 sph for a 16-page, 8.5 x 11″ signature, the TH 82-P increases the output to 16,500 sph — at the same linear speed.
Here are the key innovations:
Feeder. With traditional feeding, the operator has to tend the feeder and remove folded signatures at the delivery to ensure uninterrupted production. Because every sheet of paper is lifted twice, operators must pace themselves to a speed that is often below the capabilities of the folder. A pallet feeder lets the operator simply load the pallet and run the folder from the delivery.
Streamfeeding. Streamfeeding almost doubles the throughput of each fold plate without increasing linear speed. As one sheet exits the fold plate, the next sheet is already entering it. Advanced air control at the fold rollers and in the fold plates separates the sheets and prevents marking.
Folding station. Automation for both rollers (setting of paper thickness) and plates (for format and folding sequence setup) makes an especially big difference when the operator has to handle many different folding schemes on different substrates.
Deliveries. The latest generation of high-speed deliveries matches the output of the latest folder generation. High-pile stacks and buffer spaces give the operator time for quality checks and production optimization.
Automation. Touchscreen control supports the operator not only with an intelligent folding catalog that shows how the sheet is folded for each imposition but also with a smart interface that guides the operator through the entire makeready sequence.
Sheet Control and Monitoring. Whether by means of pulsed air at the feeder, sensor-controlled infeed, venturi air-controlled sheet alignment, sensors throughout the machine, or the comprehensive presets, sheets are continuously monitored during folding to make production more stable and reliable.
Push-to-Stop Folding. Sensors in the feeder and delivery recognize a job-specific bar code. When a new job in the same layout arrives, the machine folds the first two sheets and ejects them at the delivery for operator review. At the same time, the delivery pile is cleared to avoid mixing signatures. After about 20 seconds, the folder starts the subsequent job — without operator intervention.
Thanks to the modularity of its feeder, folding station, and delivery options, a Stahlfolder device can be configured to match the production volume of any shop — all while replacing two or three legacy folders.