CNC Roll Forming Machine Pre-Cut and Post-Cut Advantages and Disadvantages

CNC Roll Forming Machine Pre-Cut and Post-Cut Advantages and DisadvantagesWhen the designer are considering to how to design the new CNC roll forming machine. How to cut the steel product into desired length is also an involved option.pu sandwich panel line
There are totally 3 kinds of cutting positions. so the designer should choose between Pre-cut, Middle-cut, Post-cut. The Pre-cut CNC roll forming machine, the coil strips is cut before entering the roll forming mill. And Middle-cut, the coil strips is cut between the roll forming stations. This design is applicable to a complex shape , which is difficult to make as Pre-cut or Post-Cut. The Post-cut CNC Roll Forming Machines, the coil strips is cut after roll formed. View Cold Roll Former Cutting Position for more details.
As for now only less roll forming machines adopt Middle-cut design. so we will only talk about the advantages and disadvantages of Pre-cut and Post-cut roll forming machine designs:
Advantages of A Post-cut CNC Roll Forming Machine
Less roll forming station and entry guide required while compared with a Pre-cut roll forming line
Only the leading edge of the first piece product will be bit deformed while a new coils is fed into the roll forming mill.
The ends twisted, flared, cambered and bower are easier to control
The length of the steel product is not limited.
Disadvantages of A Post-cut CNC Roll Forming Machines
There will be a slight burr or distortion on the specific profile or no-supported areas of the cross section.
If there are many sizes product, more cutting dies are required.
A rotary saw post-cut will be used for a very complex profile. but it will make much more noise and burr. If choosing cold cutting saw, which is very expensive.