Cold Roll Former Cutting Position
As we know that, a continuous cold roll former( cold roll forming machine) is a whole line with the cutoff die. The Coil strips move continuously during the roll forming production. Only if you use a very simple roll former which is adopt cut-into-piece sheets to produce roll forming product. Normally, the cold roll former cutting position have 3 design:
- Precutting before roll forming
- Cutting between roll forming
- Postcutting after roll forming
Precutting Before Roll Forming
Some Special Roll Former use the pieces cut to length before roll forming to run the roll forming machine without stopping. Sometimes, to reduce the changeover time of changing the cutting die, the designer prefer to a precutting design. Such as: door panel roll forming machine, purlin roll forming machines etc. The common point is the width of steel product is various. the roll former mill can be adjustable automatically.
Cutting Between Roll Forming
Occasionally, the steel profile is partially roll formed, then cut to length before the final roll forming pass. This design is applicable to a complex shape , which is difficult to make as postcutting. But for now, only few roll formers adopt such design. With the development of precutting technology and cold saw cutting. More and more cutting method is generated instead of it.
Postcutting After Roll Forming
This is a very common cutting position. After cutting, the finished roll forming product is either keep moving to next operation( packing) or dropped into a running out table.
In a roll former, every piece of the coil strip is moving until it is cut to length. Therefore, in processes where the tool is engaged in the moving material such as punching, notching, embossing and so on. The dies is moving or stationary will influence the speed of the roll former speed.