EoW January 2010

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EuroWire – January 2010 68
Extruding – machinery & equipment
Pulleys for extruding
Wyrepak offers a range of guide pulleys highly suited for extruding wire. In particular,
the WP series pulleys have nitrile rubber contact rings. This hardwearing rubber ensures
smoothness and dampens vibration.
A variety of sizes are available from a contact surface diameter of 2.5" up to 22".
The contact rings are replaceable. Larger pulleys can be fitted with single or double
bearings: double bearings improve stability.
Wyrepak also has available its UA series of small pulleys. All have solid polished ceramic
contact rings and are available with contact ring diameters of 15mm, 20mm, 30mm,
40mm and 50mm.
Wyrepak Industries Inc – USA Fax: +1 860 632 5775
Email: Website:
WP pulley with rubber contact ring ▲ ▲
Spools for extrusion processes
The A Appiani Srl product range includes spools for extruding applications. Traditionally,
standard single-flange pressed spools (BCG-type) or composite ABS-steel spools
(P-type) are used in extruding processes. Above all, the second type, P-type, is widely
used for the extrusion of telephone and communication cable, and fibre optics.
In response to the need for lower cost spools offering high performance (high speed
through efficient dynamic balancing) and longer cable lengths with higher weight
capacities, A Appiani has focused more on the manufacture of partially machined and
dynamically balanced structural steel reels suitable for the extruding process. This kind
of reel is also suitable for the extruding process of large size cables.
Features and advantages of the P-type:
Lighter structure than traditional BCS reels. Traditionally, in extrusion, there are no •
heavy weight spools, so a lighter structure is more appropriate
Quick to assemble •
Geometrically perfect with minimum tolerances and reduced concentricity due to •
partial machining and dynamic balancing according to Q16 ISO 1940
Suitable for high speed processes up to 25m per second •
Full machining of the barrel if required •
Options available include pockets for reel lifting and handling, and screwed or pressed
interchangeable bores with hardened steel bushes or other special materials. An
alternative to the BCS reel is the BAP-type (double flanged pressed steel reel); a partially
machined and dynamically balanced reel, which is also suitable for the extruding
process.
A Appiani Srl – Italy Fax: +39 030 9382425
Email: Website: