Danobat coil fed laser&punching equipment can improve the metal usage efficiency and throughput compared to normal blank fed manufacturing, reducing the part cost, and increasing the production rate.
When laying out parts in a blank sheet for punching or laser cutting, it’s generally not possible to fill the entire sheet with parts, generating scrap metal that can’t be used. This scrap can be sold later but at a fraction of the price of the blank metal so it’s important to keep it to a minimum. This scrap amount is higher when cutting not rectangular parts, and especially circular ones.
There are 2 kinds of scrap produced when punching or cutting from blanks: the one between parts inside the blank and the one between the last part and the edge of the blank.
For scrap between parts, there is not much we can do, other than modifying the nesting till finding one that optimizes the unused area keeping it to minimum.
It is for the scrap between parts and sheet edges, when coil fed metal helps to reduce the scrap. You can handle the incoming metal sheet as infinitely long, with no side edges, so you can cut to size and join blanks together, eliminating that part-to-edge unused space.
Related to scrap removal, Danobatgroup’s Sheet Metal Division has different solutions that allow the removal of scrap directly from cutting or punching bed. Among all these, solutions we highlight the recently developed new X-GAP system.
Also, another advantage of coil vs blank feeding is the continuous availability of material. With blank feeding, once a sheet is finished, it must be removed from the cutting or punching bed, and another one brought from the feeding system. This makes the machine not producing any part while blanks are replaced, wasting time and reducing the throughput.
In a coil fed laser system for example, the metal is available continuously, so many more parts can be produced until a new coil is needed, achieving a higher production throughput and almost 100% machine usage.