Slitting Lines

A Slitting Line divides master coils of steel, aluminum, copper, or brass to create multiple specified widths or "mults" provided by secondary users (e.g., metal stampers, tube producers, or roll formers), which are then utilized it in the production of their of the finished product.

The Slitting Line consists of three main parts, the Uncoiler, Slitter Head, and Recoiler. The process begins with the master coil loaded onto the Uncoiler via the Entry Coil Car. The Uncoiler will unwind the coil onto a peeler to allow the head of the coil to enter the edge guides and a set of pinch rolls which guide the coil into the Slitter Head.  The Slitter Head consists of two arbors mounted with rotary slitter knives, which then split the coil into narrower strips or "Mults." Finally, the Mults will pass through a tension device and onto the Recoiler, which re-wraps the slit material into narrow coils onto a mandrel. The mults pass through a separating device mounted to the Recoiler to keep the slit product isolated. It is then carried off the Recoiler via an Exit Coil Car and into the packaging equipment or Banding Line.

Slitting Lines are built to handle a wide array of coils sizes. They range from 8 to 84" inches in width and up to 96" in the Aluminum industry. Master coil weights can range from 3,000 to 100,000 pounds. Flat-rolled steel can be produced as thick as .875" thick to as thin as .006 for some specialty metals. Speed can range as fast as 2,000 fpm or as low as 100 fpm, depending on the desired processing.

VX-LLC is one of the world's foremost re-sellers of second-hand Slitting Lines. Our extensive inventory and service stand out by providing valuable opportunities for customers thru substantial cost savings and prompt delivery time compared to new machines. If you have trouble finding the equipment you're looking for, please contact us today!

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Frequently Asked Questions About Slitting Lines

What is a Slitting Line?

A slitting line takes a master coil and makes longitudinal cuts to produce narrower, predetermined widths. The line is usually made up of three main parts—an uncoiler, slitter, and recoiler. The uncoiler feeds material through the nip between the two cutting wheels positioned above and below the feed and is then rewound into the smaller coils (called “mults”) onto the recoiler. Part art, part science, the slitting process performs an essential function in preparing material for downstream use such as metal stamping or tube forming before shipping to its final destination.

Slitting lines can cover a variety of cutting needs from 6” to 96” wide, 5 ton to 60-ton capacity coils, and from .006” to 1.00” thick material. Processing speeds can be anywhere from 100 to 2,000 feet per minute, depending on material thickness and yield strength.

What is the Slitting Line Process?

A strip of metal unwinds from the uncoiler and is sent to the line for processing at the speed and direction best suited for the type of material & thickness. As opposed to a cut-to-length (CTL) process that cuts strips of metal to a specified width and length, the slitting process takes a master coil of material and breaks it down into smaller coils with specific diameters only before being sent to the recoiler.

The recoiler then winds the slit strips of metal onto a spool-shaped device. One feature of a recoiler is an expanding mandrel that can control the strip rate and direction as it rewinds into mults.

What are Mults Used For?

Once the mults are cut and sent to their final destination, industries use them for various purposes. Slit steel coils can be used to manufacture pipes of different sizes and lengths. Some coils end up as vehicle frames, car seat frames, and other automotive parts. Likewise, manufacturers use slit coils in the building of railroad equipment and cars or anything that needs solid framing and parts manufacturing, including components for the agricultural and aerospace industries. And, while not necessarily a manufacturing use, mults have been used in numerous large-scale community art projects and sculptures.

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If you do not find your desired equipment in our inventory, please let us know your requirements, and we will utilize our connections to locate the right equipment to meet your needs. Contact us today for assistance!