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HOME : PLANTS : ROLLED PLANT : ABOUT Rolled Products Division - Marengo, Illinois Rolled Products Materials Rolled Products was established in 1950 to serve Arnold Engineering's Wound Core business in producing Moly Permalloy foil for the manufacture of Bobbin Cores. Our first mill was a 4" (102 mm) Sendzimir cluster mill that is still in use producing precison foil. Today Rolled Products has several Sendzimir cluster mills. Our widest mills can roll 17-1/2" (445 mm) wide materials to a thickness of 0.0005" (0.013 mm), while the 4" wide mills can roll material as thin as 0.000085" (0.002 mm). Rolled Products specializes in reducing the thickness of metal alloys by running the metal between work rolls. While the metal is moving between the work rolls, pressure is applied. At the same time, both forward and reverse tension is applied to the alloy strip, causing it to move through the work rolls at a controlled rate. This process is also known as rotary extrusion. The metal is reduced in thickness by getting longer not wider. The reduction process "work hardens" the metal. After a certain amount of thickness reduction, additional reduction is not possible until the material has been annealed. Depending upon the type of metal alloy and the required final mechanical characteristics, the alloy foil might be rolled and annealed several times. Cluster Roll Mill Box The specific rolling and annealing processes have a direct impact on the mechanical characteristics of the metal. These are classified as elongation, yield strength, tensile strength, and hardness. They identify how much the metal will deform prior to cracking. This is important for subsequent forming processes such as stamping, bending, shearing, etc. See the Rolled Products Glossary if you would like a more complete explanation of the terms. Additional operations that may be performed on the metal include slitting to the customer-specified width, coating, cleaning, and heat treatment to develop specific magnetic characteristics. A simple comparison might be that the rolling process looks like an old time wringer washing machine or a pasta rolling machine at work, except metal is moving between the rolls. Product Applications The alloys and applications of rolled products materials are wide ranging and include both magnetic and non-magnetic material. Magnetic Applications Semi-hard magnetic materials include the ARNOKROMETM family of alloys. These materials are used in anti-theft applications (also called EAS or Electronic Article Surveillance) as well as motors and sensors. Examples of security tag applications that use ARNOKROMETM magnetic materials The anti-theft materials are made into tags that are either inserted or attached to retail products. The purpose of these tags is to prevent unauthorized removal of a product from retail stores, warehouses, or libraries (shoplifting). If an item is not checked out correctly through the clerk, the tag will set off an alarm at the exit to alert security personnel. ARNOKROMETM materials are also used in hysteresis-coupled drives for light duty applications such as twisting of the auger in vending machines (to drop a bag of chips), or moving a control lever in a building's HVAC duct system to direct the flow of air. Other applications include hysteresis clutches used on weaving equipment to control thread tension, float gauges in storage tanks, sign flippers on buses, and medication identification tags to promote accuracy in tracking IV solutions for hospitals. Examples of hysteresis rings and magnets Soft magnetic materials include 3% silicon steel and nickel iron alloys. Silicon steel is typically used for the laminations in transformers and inductors. Nickel iron alloys can be used as a partner material with ARNOKROMETM in anti-theft tags. (The tags require both a soft and semi-hard magnetic material to function.) Another use for nickel iron alloy foil is in shielding applications to capture unwanted stray (electro-) magnetic fields, for example: inside your computer, around high frequency transformers on aircraft, and near compasses in an automobile console. Non Magnetic Materials and Applications Titanium and titanium alloys have low density and high strength. They are ideally suited for applications such as the following: Loud speaker domes for accurate audio reproduction Body implants such as, heart pacemaker cases Irradiation windows for sterilization of food and medical instruments Battery activators for watches and electric cars Shims for aircraft frames Satellite plumes (umbrellas to protect satellites) Osmosis medium to convert saltwater to fresh water ARNAVARTM is used as a protector material in check sorting machines to get all those checks you wrote back to your bank; the account code, bank location and amount must be read and sorted. At the bottom of each check are a series of numbers. These numbers (MICR) are magnetic and are read by special equipment. The MICR numbers and the check are very abrasive. Each check is passed at high speed over a read head. To protect the sensitive (and expensive) read head from wearing, which could result in damage and errors, our ARNAVARTM foil is placed between the read head and the abrasive check. ARNAVARTM is very abrasion resistant and non-magnetic so it protects the read head and does not interfere with the magnetic coding. Stainless steels are known for their resistance to corrosion. Customers applications include : Motor start switches Long-life battery anodes Window seals Shims Tool wrap for heat treating Strain Gauge Alloys are materials that change their electrical resistance under stress. Arnold converts customer materials for applications found in aircraft landing gear, bridge braces, load cells, scales and sensitive tension related instruments. Material names include: Karma Constantin BalcoTM Cupron Nickel The X-33 SSTO (Single-Stage-To-Orbit Space Vehicle). Rolled Products produces materials used in the metallic thermal protection system Technical Alloys produced by Rolled Products include materials used in the aerospace industry. InconelTM materials are used to form heat resistant honey comb structures in jet engine heat deflectors. Rolled Products materials are used in jet engines Other alloys are used as brazing foils to bond jet engine blades together. Pure nickel is used to create a clean, single grain casting to form jet engine blades. Some of these alloys are also used as diaphragms in pressure gauges for precise measurement of industrial processes. Bar stock and other metal alloys are also valued contributors to fill out our product offerings. Rolled Products purchases and resells 2% vanadium cobalt bar stock that is primarily used by our customers to help concentrate the lines of flux produced by permanent magnets. This alloy is manufactured in our Alnico Products Division and at Swift Levick Magnets. Other materials include Copper, Aluminum, Carbon Steel, Brass, etc. On the eve of our 50th anniversary, we are proud to state that we have processed over 200 different metals and alloys. The alloys processed by Rolled Products are integral to the function, although usually hidden from our view, in a wide array of our customers end products -- products that offer us convenience or which are necessary in our life. TOP | BACK | HOME | HELP | MAP | CONTACT Copyright © Arnold Magnetic Technologies Corporation. All Rights Reserved. Please send all web related questions/comments to the Webmaster.