NH/DNH-80

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SIGLOCH Nipping Presses NH/DNH-80 – perfect shaping of the book block spine The Sigloch nipping presses NH for single line and DNH-80 for double line are used to ensure optimum book block finishing. Nipping pressure applied to the joint of the thread-sewn book block after gluing and lining corrects the incline of the spine in the joint area to produce a right-angled block spine. The book blocks are transported into the nipping presses in an upright position on their spines; the pressing process is executed with the product at a standstill. Integrated pre-pressing jaws prevent displacement of individual signatures within the block and deformation of the block spine. The DNH-80 is primarily used downstream of the SIGLOCH TF/TFD drying conveyors. The DNH-80 can be directly connected to the double line TFD drying conveyor. In the case of the TF single conveyor line, it is necessary to link the TW dividing switch between the TF drying conveyor and the DNH-80 nipping press. NH/DNH-80 Innovations Motorized adjustment of the pressing jaws Electronically controlled setting of the pressing time Integrated protective cladding with wide opening, pneumatic spring assisted, large protective hoods to ensure optimum accessibility Increased efficiency and shorter change-over times due to data exchange via Ethernet with other machines of the inline book production line Intuitive operator guidance via graphical touch screen display Ergonomic design In this way, the NH and DNH-80 ensure perfect results for subsequent threeknife trimming and absolute edge precision of the finished book. The adjustment values can be set automatically via Ethernet or touch screen. In inline mode or as an offline solution, the Sigloch nipping presses NH and DNH-80 offer universal solutions for the processing of thread-sewn book blocks.
Performance Profile The book blocks are transported and pressed standing on their spines – this guarantees uniform, right-angled and precisely shaped book blocks Motorized adjustment of the toggle lever mechanics to the block thickness Pre-pressing jaws fix the block and prevent displacement of the individual signatures and deformation during pressing Can be used as a flexible free-standing machine or as an efficient component in a book block production line Infinitely variable pressing times Short change-over times 1. Unpressed 2. Action of the pre-pressing jaws NH/DNH-80 Technology & Function Depending on the version – NH for single line or DNH-80 for double line – the book blocks are fed directly or via TW dividing switch from the drying conveyor into the nipping press. The book blocks are pressed in the NH/DNH-80 at a standstill. This ensures right-angled book spines without creases which is particularly important for thicker book blocks. The PLC control system ensures that the book block is centrally positioned between the pressing jaws and that the pressing stroke is triggered at the same time. The book block is fixed by pre-pressing jaws above the joint to prevent displacement of individual signatures within the book block (see diagrams 1 to 3). In conjunction with the toggle lever mechanics, the pneumatic cylinders produce a pressing force of 12 t that is transferred via connecting rods to the pressing jaws. The pressing time is infinitely variable. In the case of using DNH-80 it can be adjusted separately for each pressing station. After pressing, the book blocks are laid down by a block tilting station and fed to the downstream machine for further processing. 3. Pressed
Page 1: Nipping Presses NH/DNH-80

NH/DNH-80

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