Polyurethane Developments – Metal Center News

Polyurethane Developments
Kastalon Polyurethane Products, Alsip, Ill, has a mission: to protect coils with polyurethane. While the company has traditionally manufactured pads to protect coils, it also offers Coil Saddles, which are a variation of coil pads. “It’s very similar to a pad, except it’s two very robust pieces that have a thinner cross-section, but they have a very deep radius,” says Bob DeMent, president. “They actually carry two different radiuses for different diameter coils.”

Because the Coil Saddles are so deep, they inadvertently are also safety mechanisms for the coils and the people working with them. “Their depth allows fewer roll offs and easier landings from overhead cranes,” says DeMent. “The coils seat themselves much better [in the Coil Saddles], which provide a much more stable environment for the coil.” He adds that they are easily anchored into the floor and easily moved and that these polyurethane Coil Saddles handle coil weights better than all-urethane or all-rubber pads.

Kastalon also offers filler plates, “which allow a processor to take his existing mandrel, which let’s say is equipped for 20-inch ID coil processing, and bolt on filler plates, which are just added-on diameter,” says DeMent. “They bolt these plates onto the circular mandrel, and it will allow them to work with coils much larger on the ID than what they’re traditionally set up for. These filler plates are immensely inexpensive compared to having a whole new mandrel made, so the processors or the mills are allowed to take advantage of perhaps spot purchases of coils with a varying ID they’re not used to processing.”

He points out that steel filler plates have been the norm in the marketplace and can attach to a mandrel relatively quickly. Yet steel being so expensive and heavy makes it difficult for the mandrel to operate. “The more weight you add, the harder it is on the machine. The weight endangers those who handle these plates and the plates themselves,” says DeMent. While plastic filler plates have become a popular alternative due to their low weight and low cost, they are physically not strong, says DeMent. “If you drop those, it’s not as much of a hazard to a human being, but they can crack, and then you’re out quite a bit of money.”

Enter Kastalon’s polyurethane filler plates, which give the weight reduction of plastic over steel and have the properties of urethane, “so they don’t scratch, they don’t mar, they don’t dent,” says DeMent. “In this day and age, with coil tonnage being so expensive, you must maximize every inch of that, every pound of that to reduce your scrap, but you’ve got to take advantage of being able to process almost any ID coil that you can get your hands on.”

Most important? “Customers are loving them,” says DeMent.

Originally reported By Beth Gainer on Jan 26, 2022 – Coil Coating – Metal Center News

New Summit Lathe Roll Grinder

July 2020, Kastalon has purchased and installed a new Summit roll lathe to further enhance our large roll manufacturing and repair capabilities. Kastalon now offers the most comprehensive roller services in the industry.

The Summit lathe/roll grinder allows Kastalon to not only machine metal, but to turn, mill, groove, and grind polyurethane and rubber covered rollers to ultra-precise diameters, geometric finishes, and straightness specifications. This CNC machine has a capacity of 48 inch finished diameters x 20 feet CC (1.22 x 6.1 meters) and almost 50,000 lbs with full CNC grooving. Simple to highly complex and precise grooves and finishes can be produced with this state-of-the-art equipment.

Kastalon’s roller capacity ranges from fractional diameters and face lengths to 62 inches in diameter x 30 feet overall length (1.57 x 9.1 meters). Kastalon’s polyurethane roll coverings are available from 20 Shore A to 75 Shore D (baby’s skin soft to bowling ball hard, and anywhere in between) with surface finishes and groove patterns to optimize your roller’s performance.

We’ve combined chemistry and mechanics just for you. Contact Kastalon today and bring the Kastalon’s advantage to your operations.

Designing Rollers – Kastalon helps companies save by joining their design team!

When designing a roller assembly it is critical to take into consideration the actual application and environment that rollers will be operating in. Although the drawing might be accurate, it is essential to involve your roller manufacturer in the design phase to assist in choosing the right polyurethane compound that the roller will be covered with. Not all polyurethanes are the same, but understanding how the roller is going to be used and where the roller will be located, is essential in choosing the right material that will result in the best performance.

To avoid over engineering a roller assembly, which can affect the cost and lead time, the roller manufacturer can help choose the proper material with adequate tolerances for the specific application being planned. For example, calling out a very tight tolerance can drive up the cost of the roller unnecessarily.

This is where Kastalon can help.

Recently, a customer gave us a drawing for a new roller assembly for a new process. The engineers called out a TIR of .005. After several months of receiving the rollers as requested, they sat down with us and shared their concern that the cost of the rollers was negatively impacting their ability to sell their new system. Once they shared the actual application and environment with our design engineers it was determined by opening up the tolerance to .015, the cost could be reduced by more 20% with no effect on quality, life expectancy or system efficiency. The lead time was also significantly reduced and the outcome was the customer’s ability to deliver their new system at a lower cost and a reduced lead time.

We like to think that having us on your design team is a win, win proposition!