Unlike a single bladder lug, button or leaf air shaft, a Multi-Bladder shaft has expanding components that are in multiple, equally spaced rows on the outer diameter of the shaft. Each of the gripping ledges has a separate bladder underneath and span the entire length of the body.
Goldenrod's European counterpart Svecom invented the Multiple External Bladder design over thirty years ago, and Goldenrod soon introduced it to North America. With over 40 multi bladder design variations from which to choose, Goldenrod finds the right solution for the application.
Goldenrod has over 40 multi-bladder design variations from which to choose including our patented carbon fiber pultrusion design whereby we pultrude carbon into the hollows of an aluminum extrusion to offer our customers the latest in light weight shaft technology.
When considering an expanding reel spool, there are three options.
1. Mechanical Design -- Cores are slid onto the non-air reel spool until they hit a core stop at the far end. Then the operators place a large "nut" on the near side and tighten with a "spanner" wrench until all cores are secure.
Disadvantage: Safety (reports of lost fingers due to misuse of wrench and back injuries due to cores being too difficult to dislodge are common);
Time--it takes more time to core up and de-core the rolls; this design has no centering which may limit speed; Difficult to change web widths.
2. Axial-Pneumatic Core Clamps--Pneumatic clamps are placed on either end of the reel spool acting as book ends for the empty cores. They clamp down to the reel spool using air.
Disadvantage: This design still takes too long; difficult to change slit widths; no true centering which may limit speed.
3. Pneumatic Reel Spools -- This option is the choice for most new operations or for those seeking to upgrade to the most efficient method of production.
Advantages: Easy changeover; enables maximum machine speed (w/our centering design); simple maintenance (with our design); fast payback.
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