The point to firstly consider is the press and die with which you will use the machine. Although it is thought that the first question to be asked while selecting a press feeding line is width, thickness and type of the sheet, this is not always true. The points to firstly examine in parallel with each other are what speed your line should have and what space you have in order to place the machine. Because the press feeding lines are simply separated into two types. The first consists of classical, conventional press feeding lines, that is, a decoiler, a straightener and a servo motor controlled feeder. In these lines, the part determining the speed of the line is the decoiler. The average sheet decoiling speed of a roll sheet decoiler is 12 meters. If you need faster lines due to your feeding lengths and fast operation presses, then you have two alternatives for the solution. The first is to scoop out a hole between the decoiler and the straightener where you can accumulate the material. The second one is to ensure to remove required amount of materials from the decoiler by the straightener using an decoiler with disc break system.
Since these lines occupy huge space, the compact line types are preferred as alternative to these lines to be used by the companies with insufficient space. These compact lines consist of a decoiler and a servo motor controlled feeder – straighetener (Photo 1). The feeder roller transmits the drive from the servo motor to the straightener rollers through the drive gear system and the transaction of straightening occurs. Such lines occupy less space by half than the conventional press feeding lines. However, it is not possible for the compact lines to be used in production exceeding an average speed of 12 meters per minute.
In some cases, it is not possible for us to choose a compact line even if our line speed does not exceed 12 meters per minute. For example, we have to work with conventional lines in a production line running with inox material. The reason is that while these types of materials are straightened, the material has to flow non-stop within the straightening rollers. On the contrary, it is possible to see the roller marks on the material when the material is kept under light after being painted. Therefore, no matter how slow our line speed is for these materials, it is not possible to use compact lines. Because the straightening rollers in the compact lines receive the drive from the servo motors. Since the servo motor has to stop and start at each feeding length, the straightening rollers, too, have to stop and start like the feeder rolls. For this reason, it is not possible for the material to flow non-stop between the straightening rollers. As we have mentioned, this causes marks on the materials after painting.