EuroWire March 2023

Technology News

Ready for take-up? Many factors in the vast field of cable and wire production can complicate the selection of the right winder for a particular project.

cable and wire product segments, from compact machines for small product sizes to large machines suited to heavy weights. For each Rosendahl Nextrom winder, the motor and gearbox are individually adapted to the line speed and product properties to ensure the lowest tensile fluctuations. are designed for easy operation, either with or without the protective grids required by CE specifications. Each machine has its own touch terminal for operations including lifting, lowering, swivelling, bobbin selection, traverse correction and tip operation. All winders are equipped as standard with their own PLC, and various interfaces are available. For higher production speeds, the company recommends the use of a dancer to maintain a stable process by constantly balancing the tension. One of the latest additions to Rosendahl’s machine range is a series of semi-auto matic double spoolers. These machines Rosendahl Nextrom’s winders

The first decision is to choose between payoff and take-up – an important distinction from the beginning. Many winders and reelers can be used both for payoff or take-up. However, the direction of rotation and control unit must be set up accordingly. Switching from take up to payoff or vice versa is possible, but requires significant changes to the machine. The next important aspects to consider include coil size, coil weight, product properties and production speed. Not every conductor can be wound on every coil: there are physical limitations. The operator must maintain certain degrees of deflection and take into account the weight that presses down to the lowest layer. In the case of high speeds, centrifugal forces need to be calculated to keep everything under control. Rosendahl Nextrom offers a wide variety of payoffs and take-ups for different

Rosendahl’s RODS 800 semi-automatic double spooler

are particularly suitable for high-speed in sulation processes up to 1,500m/min with reels of up to 2,500kg in weight. The RODS (Rosendahl Double Spooler) series covers take-up machines with a reel size of up to 800, 1,000 or 1,250mm, and can automatically change between two spools at full production speed, enabling continuous production. The RODS double spoolers are also available as single machines.

Rosendahl Nextrom GmbH https://rosendahlnextrom.com

Extrusion head with no hardware, for easy cleaning The Bullet® from Guill Tool is an extrusion head with a fixed-centre, multi-port spiral flow design and gum space adjustment. With no fastening hardware, cleaning and restart are said to be easier and faster than with conventional heads. The new patent-pending Cam Lock® deflector retaining system offers

accommodated with the simple changing of just one component. Various crosshead designs are available and users can specify the “calibre” – the maximum die ID. A vacuum chamber and kit for assembly and disassembly are included with the unit. Optional keyed tooling capability offers machine designers and end users quick orientation. The overall unit design enables faster disassembly, cleaning and restart. Guill Tool & Engineering Co, Inc www.guill.com

additional benefits to extruders and machine builders. It only takes half a turn of the Cam Lock to remove and install the deflector and tip; no fastening hardware is required. There is a threaded retaining ring for the die and threaded tip retainer; dies are removed from the front and tips from the rear. Tooling retainers also provide gum space adjustment. High- and low-volume applications are suitable for this head and are

The next generation of the tool – the Bullet II – allows quick tooling changes, as the tips remove from the back and the die removes from the front of the unit. The absence of fastening hardware eliminates leaking, as does the taper body and deflector design.

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March 2023