PFFC - October 2008 - (Page 40)

CORE SHAFTS Stability Achieved This 63-in. Deacro slitter with Goldenrod shafts now runs 70% of the time in differential rewind mode. in. outer diameter (O.D.) with differential shafts. The company switched its core shaft technology on the slitter from a competitor’s differential shaft to a Model 1250-CL (Cam Lock) design from Goldenrod Corp. It grips the core more securely than previous shafts. “More and more converters want bigger rolls,” says Weber. “A lot of the older Mark Andys and Webtrons can handle a 40-in. O.D., so they have less changeover and save on scrap. It creates a lot more efficiency for them.” Weber says this secure grip is particularly critical for WebCut as a contract converter that constantly switches between roll widths, lengths, and weights on every machine. Its older shafts from a different supplier simply didn’t perform as well. “In their defense,” Weber says of the previous shaft supplier, “we are a contract manufacturer, so every time we put something on there, it’s different, it’s new. We received an application for higher tensions and larger O.D., but we didn’t want to sacrifice the low end of tension. We slit Shaft Is Bored Shaft weight was a concern for WebCut Converting (WCC), which needed a shaft that could handle 500 lb of rewind roll weight at a 40-in. dia roll build and at run speeds to 800 fpm. With frequent changeover and given that the shaft was a lift-out shaft handled by the operator, Goldenrod worked with WCC to reduce the weight of the shaft by boring out as much material as possible without compromising the shaft’s integrity, says Dan Weber, WCC president. The company dropped the new shaft into the Deacro slitter and began running quality rolls at full machine speed on the same day. What was once a machine that ran only in locked core mode now runs 70% of the time in differential rewind mode. The Goldenrod 1250-CL features a series of cam lock rings situated across the face of the shaft that grip and lock the inside diameter of individual cores. The inside diameter of the cam lock ring then becomes the point of friction on the internal pneumatic shaft. The cam lock rings rotate on the internal pneumatic shaft that utilizes engineered materials (hightemperature plastic or felt over a bladder system) to expand and control the amount of slip. Weber says the additional capability on the 940D slitter and the stability provided by its Goldenrod shafts should help WCC realize its long-time goal of expanding its customer base to the broader packaging market. “Probably 90 percent of anything from a half-mil BOPP what we do is specialty, high-end film to a 30-mil extruded film, films,” notes Weber, “so we see from one-quarter inch to 80 a lot of potential in the specialty, inches; we never know what lower volume side of the packagwe’re going to get.” ing industry.” Weber notes the old yoke With its ongoing improvedifferential technology it uses ments in equipment and techon another machine works nologies, Weber feels WebCut by loading a stack of cores Converting is even better poand spacers laterally against sitioned to service its customa fixed collar. Cores are ers’ unique requirements. allowed to rotate, but spacers are keyed and rotate with the Contributing editor Edward shaft at a set overspeed. Boyle, based in Reading, PA, A pneumatically controlled has covered the converting yoke applies pressure on the industry for more than 24 spacer and cores. Friction is years. Contact him at EJB applied on the sides of each Communications; 610-670core by the spacers, and the 4680; ejbcomm@aol.com. cores are allowed to rotate at their own rate. As roll diameter increases, so does uSupplier Infot uGoldenrod Corp. | the air pressure in the yoke. www.goldrod.com Mark Olsen, technical dePFFC-ASAP 340 velopment manager of WCC, uDeacro Industries | recognized there were disadvanwww.deacro.com tages to this system. Operator PFFC-ASAP 341 set-up time is very long, and uRosenthal Mfg. Co. | the company had to inventory a www.rosenthalmfg.com wide variety of core spacers due PFFC-ASAP 342 to the variety of jobs run. Based uSiat Flexo-Printing on personal experience, Olsen Equipment Corp. | knew this system was known www.flexo-siat.com for inconsistent tension across PFFC-ASAP 343 the web and for generating excessive dust. WWW.PFFC-ONLINE.COM 40 | OCTOBER 2008 http://www.goldrod.com http://www.deacro.com http://www.rosenthalmfg.com http://www.flexo-siat.com http://www.pffc-online.com

Table of Contents Feed for the Digital Edition of PFFC - October 2008

PFFC - October 2008 Contents First Glance Calendar of Events From the Editor Web Lines Process Management News Clips Narrow Web & Label Reporter Narrow Web & Label What's New Products Shrink Sleeves Carton & Box Reporter Carton & Box What's New Products Cover Story - Custom Coating Core Shafts Show Preview Flexo Printing Film Converting Static Control UV/EB Inks What's New Products Trade Show in Print Services Directory Classified Marketplace Equipment Buyers & Sellers Advertisers Index Experience Speaks

PFFC - October 2008

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