This is what a total line could typically look like, the colored boxes are the piece's of machinery that would be built at GFG. The configuration would change to fit the needs of the customer. Notice that the direction of travel may change, so the Coater can be configured for vertical or horizontal passage. The strip process dept. now can supply any of the other machinery shown, typ. in narrow width lines.
This process known as Roll Coating may not seem obvious to most people. And what is the end result? Have you ever wondered how they paint a piece of steel siding, some appliances, and many other articles that are made of light steel up to thicker uses also? It is painted long before it becomes anything that you would recognize. The strip(coil) is going through a line of machines that may be almost a mile long. It could be narrow, about 4 inches wide, or 90 inches wide.
Imagine a coil of steel being unwound like a roll of toilet paper. It could then be coated on both sides as it passes through various machinery. When you paint with a roller you pick up paint in a pan, you meter the amount on the top of the pan, then you apply it to the wall. And don't forget that you had to clean the wall first, Chemical Coater which etches the steel so the paint will stick. You more than likely primed the wall if it was a new surface, Prime Coater. Then you finally applied the finish coat, Finish Coater. So inbetween coats you had to wait for the paint to dry, but you have heard of baked enamel, so thats what the ovens are for between the various coaters. If the paint can be controlled to the minimum required to do the job you will save alot of paint. Thats where specialized control systems become quite handy. Save those dollars, use multiple machines to change from white to brown in a matter of minutes! Maybe you need a protective film on one side, use a Laminator and Unwind to add this final touch. Have you ever peeled the foil from the paper of a gum wrapper, a simple lamination? Ever wonder how they got all those wrinkles in your frig, Embosser? The waxer would apply a thin film of wax if the material is to be used where forming will be necessary. I'm sure you have purchased some type of material that had a thin tissue between each piece so it wouldn't stick to itself or mar the other surface, Interleafing Unwind.
The Electrostatic Oiler is also for coil coating, but a little different and at a different time. There are many reasons that the steel must be oiled. One of the most common is to keep it from rusting until it get's to the company that is going to paint it, or form it into something useful. The oil is charged electrically, it is then pulled by the charge to the steel passing through the enclosure. Not all oils are responsive to the process. It is like static charge that everyone is so fond of and those little shocks you get on cold days when you rub your feet on the carpet. You know what a quart of oil costs, so if you can apply it evenly and at the minimum you can save alot of money! Rust prevention or lubrication for forming are the most basic reasons. Forming of tin cans for food grade use with animal fats is another example.
|Horzizontal Chemical Coater|
|"S" Coater - Prime or Finish|
|Laminator/Embosser with Unwind & Turning Bay|
|"T" type Finish Coater|
|Electrostatic Oiler with multiple Oil Select|
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