What materials are suitable for photoengraving?
All steels, alloyed and unalloyed, iron, copper and zinc.
What characteristics should the rollers' surfaces have to be photoengraved?
The surface finish suitable for photoengraving must have a grade of Ra between 0,3 and 0,8. If it is higher, the correct value can be realized by our technical staff.
Definitely not. Thanks to our technologies, the cylinders are not subject to pressures and are therefore free from deformations.
Are there any size limits for cylinders?
We can handle small rollers sized Ø 60x30 mm up to cylinders of Ø 750 x 4.000 mm, with weights ranging from a few hundred grams to 50 tons.
The cylinders must have at least 30 cm long lateral pins per side. If the measurements were lower, it is necessary to equip them with extensions.
We can start from any sample, even a very small one if inside it there is a repeat. In these cases, appropriate measures will allow to avoid the risk of the repetition or postage stamp effect.
If the sample is too small, we can recreate the drawing inspired by the specimen.
It is very important to prevent the sample from being deformed or wrinkled during transport. In this regard, it is advisable to wrap it on a pipe if it is large or protect it between two thick cardboards.
If the roll body has non-conformity of material, can it be textured all the same?
In such a case, the cylinder will be covered with a sleeve of copper that can be etched without problems, and afterwards chrome-plated.
Is it possible to recover a damaged cylinder and etch it with the same design?
Definitely yes. The drawing is detected from the undamaged area and graphically processed.
After stripping and grinding, the industrial roll can be textured with the design adapted to the new diameter, with no significant difference except the time and money savings.
What happens if no roller is available, neither new nor to be restored?
No problem. We can have it built by our trusted suppliers on the basis of a technical design or a sample roller in vision. The newly built cylinder, at the end oth the production cycle, will then be packed in a custom made wooden crade, to protect it during handling and transport operations.
How can embossing and calender rollers be protected?
Apart with wooden cases, after etching, the rolls surface can be covered with a layer of chromo, thanks to a galvanic process called chrome-plating. Another option, that can be applied upon request. is nickel-plating where nickel is used instead of chromium.
When the cylinders are subject to considerable stress on the production line, as in the case of the calender rollers for metal plates and coils, they must be treated with an induction tempering treatment with a depth of 8 / 10 mm.
