Thin materials such as paper, vinyl, films, and foils are typically sold in unwieldy rolls of continuous material. Before they can use these materials, manufacturers must have a reliable method of slitting material down to a usable size.
Companies in the converting, packaging, and similar industries rely on slitter rewinders to rapidly process wound material into smaller rolls of their desired dimensions. Jennerjahn’s slitter rewinder machines facilitate this task, leveraging advanced technology to increase efficiency and minimize downtime.
Slitter rewinder machines perform three primary functions to convert a single large roll into multiple smaller ones. They first unroll the master roll, then slit the unwound material into strips of the desired dimensions. Afterward, they rewind the newly-cut material onto new cores for distribution or use in manufacturing.
Although slitter rewinding machines are commonly associated with paper products and films, they can be used to convert almost any very thin material, including a range of polymers, fabrics, and foils.
“Since 1979, Jennerjahn Machine has been a global leader in the converting industry and continues to be a progressive, international company committed to providing the most efficient solutions for the changing needs of their customers.”
Rolls loaded into a slitter rewinding machine go through programmed stages that convert the roll into smaller, narrower rolls. The master rolls enter a staging area before being loaded. Once loaded in the rewinding station, the machine cuts through the core’s tails and tucks them into the core before unwinding and slitting the roll. Finally, the machine rewinds the rolls, seals the tails, and transfers the finished products to an exit conveyor.
Although all slitter rewinding machines perform the same general functions of unwinding, slitting, and rewinding, they use different techniques to slit the material. Razor blade cutting is the most economical, drawing the material against a fixed razor blade to slit cleanly through paper and film. However, razor blade cutting cannot be used with heavy or abrasive materials, and it may cause polymers to bend as the blade heats up.
A more versatile option is shear cutting, which is more accurate and can accommodate tougher, thicker materials. This technique uses rotating blades that slit from above and below to create a smoother cut through heavy materials.
Some machines use score cutting, especially older machines or machines used for adhesives. This technique involves cutting a film between a dull blade and a hard table. Although fast and affordable, it can cause quality problems such as cracking and stretching.
Another distinction between rewinding machines is the level of automation. Automation allows users to obtain unmatched uniformity and precision, while interchangeable blades and dynamic blade spacing accommodate specialized designs. Some slitter rewinders are fully automated from feeding through unloading, requiring minimal intervention from an operator. Others are only semi-automated, although these machines still offer substantial time savings and accuracy improvements compared to manual models.
Jennerjahn supplies a range of slitter rewinder machines to suit any industrial application. Our machines include:
In addition to rewinding machines, Jennerjahn also offers a line of automation solutions that work in conjunction with rewinders to expedite the converting and manufacturing processes. These include:
Jennerjahn Machine has spent over 40 years serving international clients with standard and custom converting solutions. Our customizable, high-performance slitter rewinders are 100% American-made and guaranteed to meet your strictest quality standards. To learn more, contact our team today.