Tips

Unwinding and rewinding of narrow width, lighter rolls will, oftentimes, be accomplished using cantilevered core holders. Unwind and rewind stands, incorporating cantilevered core holders, feature faster and easier roll changes when compared to roll support methods with dual pedestal support. Here are some ways to get added value from your cantilevered core holding application:

1) Use air shafts to hold the core, so the roll of material will slide, easily, on and off for fast and easy roll changes. Leaf type air shafts are the most efficient with zero core distortion.

2) Cantilevered air shafts are available using rotary union connection to facilitate inflating and deflating. The inflate and deflate operation can be controlled with a simple remote mounted toggle valve or through HMI control. This eliminates the need for an inflating gun to inflate the air shaft, speeding up roll changes and lowering machine operator interaction.

3) Toggle valve operation can be built into the cantilevered end of the air shaft. This is the ultimate in ease of air shaft operation. This design has the toggle valve front and center when the operator makes roll changes. Allowing the easiest and fastest roll changes.

4) Cantilevered air shafts can be designed with built-in lateral adjust. Typically, these designs include facilitating the lateral adjustment “on the fly”, while the machine is running. Manual lateral adjustment is handy when your operators want to position the web, laterally, in the machine without stopping to deflate the air shaft and reposition the roll. Bottom line, this modification can really speed up your overall setup process if lateral web position is a concern. This air shaft can be designed to utilize the standard inflating gun inflation method or the remote toggle valve inflation method.

If your application already utilizes cantilevered core holding, consider these options to get the most from the cantilevered design. If your unwind or rewind stand is currently dual pedestal (core holder supported on both sides) and you feel you would benefit from cantilevered core holding, consider the upgrade to cantilevered air shafts.